repos/blastem: png.c annotate

annotate png.c @ 2688:b42f00a3a937 default tip

Fix default target. Ensure m68k.h and z80.h are built before anything else when no dep info is available

author	Michael Pavone <pavone@retrodev.com>
date	Mon, 31 Mar 2025 21:06:18 -0700
parents	da2e06c42d16
children

rev	line source
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	1 #include <stdint.h>
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	2 #include <stdlib.h>
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	3 #include <stdio.h>
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	4 #include <string.h>
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	5 #include "zlib/zlib.h"
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	6 #include "png.h"
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	7
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	8 static const char png_magic[] = {0x89, 'P', 'N', 'G', '\r', '\n', 0x1A, '\n'};
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	9 static const char ihdr[] = {'I', 'H', 'D', 'R'};
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	10 static const char plte[] = {'P', 'L', 'T', 'E'};
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	11 static const char idat[] = {'I', 'D', 'A', 'T'};
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	12 static const char iend[] = {'I', 'E', 'N', 'D'};
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	13 static const char actl[] = {'a', 'c', 'T', 'L'};
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	14 static const char fctl[] = {'f', 'c', 'T', 'L'};
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	15 static const char fdat[] = {'f', 'd', 'A', 'T'};
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	16
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	17 enum {
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	18 COLOR_GRAY,
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	19 COLOR_TRUE = 2,
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	20 COLOR_INDEXED,
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	21 COLOR_GRAY_ALPHA,
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	22 COLOR_TRUE_ALPHA=6
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	23 };
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	24
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 static void write_chunk(FILE f, const charid, uint8_t *buffer, uint32_t size)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 uint8_t tmp[4] = {size >> 24, size >> 16, size >> 8, size};
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	28 uint8_t warn = 0;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 warn = warn \|\| (sizeof(tmp) != fwrite(tmp, 1, sizeof(tmp), f));
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	30 warn = warn \|\| (4 != fwrite(id, 1, 4, f));
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 if (size) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	32 warn = warn \|\| (size != fwrite(buffer, 1, size, f));
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	33 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	34
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	35 uint32_t crc = crc32(0, NULL, 0);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 crc = crc32(crc, id, 4);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	37 if (size) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	38 crc = crc32(crc, buffer, size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	39 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	40 tmp[0] = crc >> 24;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	41 tmp[1] = crc >> 16;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	42 tmp[2] = crc >> 8;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	43 tmp[3] = crc;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 warn = warn \|\| (sizeof(tmp) != fwrite(tmp, 1, sizeof(tmp), f));
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	45 if (warn) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	46 fprintf(stderr, "Failure during write of %c%c%c%c chunk\n", id[0], id[1], id[2], id[3]);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	47 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	48 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	49
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	50 static void write_header(FILE *f, uint32_t width, uint32_t height, uint8_t color_type)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	51 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	52 uint8_t chunk[13] = {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	53 width >> 24, width >> 16, width >> 8, width,
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 height >> 24, height >> 16, height >> 8, height,
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	55 8, color_type, 0, 0, 0
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	56 };
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	57 if (sizeof(png_magic) != fwrite(png_magic, 1, sizeof(png_magic), f)) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	58 fputs("Error writing PNG magic\n", stderr);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	59 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	60 write_chunk(f, ihdr, chunk, sizeof(chunk));
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	61 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	62
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	63 void save_png24_frame(FILE f, pixel_t buffer, apng_state *apng, uint32_t width, uint32_t height, uint32_t pitch)
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	64 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	65 uint32_t idat_size = (1 + width3) height;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	66 uint8_t *idat_buffer = malloc(idat_size);
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	67 pixel_t *pixel = buffer;
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	68 uint8_t *cur = idat_buffer;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	69 for (uint32_t y = 0; y < height; y++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	70 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	71 //save filter type
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	72 *(cur++) = 0;
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	73 pixel_t *start = pixel;
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	74 for (uint32_t x = 0; x < width; x++, pixel++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	75 {
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	76 pixel_t value = *pixel;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	77 #ifdef USE_RGB565
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	78 *(cur++) = (value >> 8 & 0xF8) \| (value >> (8+5));
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	79 *(cur++) = (value >> 3 & 0xFC) \| (value >> (3+5) & 0x3);
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	80 *(cur++) = value << 3 \| (value >> (5-3) & 0x3);
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	81 #else
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	82 #ifdef USE_GLES
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	83 *(cur++) = value;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	84 *(cur++) = value >> 8;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	85 *(cur++) = value >> 16;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	86 #else
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	87 *(cur++) = value >> 16;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	88 *(cur++) = value >> 8;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	89 *(cur++) = value;
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	90 #endif
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	91 #endif
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	92 }
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	93 pixel = start + pitch / sizeof(pixel_t);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	94 }
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	95
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	96 uLongf compress_buffer_size = idat_size + 5 * (idat_size/16383 + 1) + 3;
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	97 uint32_t offset = 0;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	98 if (apng) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	99 uint8_t chunk[26] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	100 apng->sequence_number >> 24, apng->sequence_number >> 16,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	101 apng->sequence_number >> 8, apng->sequence_number,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	102 width >> 24, width >> 16, width >> 8, width,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	103 height >> 24, height >> 16, height >> 8, height,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	104 0, 0, 0, 0, //x offset
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	105 0, 0, 0, 0, //y offset
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	106 apng->delay_num >> 8, apng->delay_num,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	107 apng->delay_den >> 8, apng->delay_den,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	108 0, 0 //dispose and blend ops
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	109 };
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	110 write_chunk(f, fctl, chunk, sizeof(chunk));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	111 apng->sequence_number++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	112 apng->num_frames++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	113 if (apng->sequence_number > 1) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	114 offset = sizeof(uint32_t);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	115 compress_buffer_size += offset;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	116 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	117 }
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	118 uint8_t *compressed = malloc(compress_buffer_size);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	119 compress_buffer_size -= offset;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	120 compress(compressed + offset, &compress_buffer_size, idat_buffer, idat_size);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	121 free(idat_buffer);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	122 if (offset) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	123 cur = compressed;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	124 *(cur++) = apng->sequence_number >> 24;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	125 *(cur++) = apng->sequence_number >> 16;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	126 *(cur++) = apng->sequence_number >> 8;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	127 *(cur++) = apng->sequence_number;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	128 apng->sequence_number++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	129 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	130 write_chunk(f, offset ? fdat : idat, compressed, compress_buffer_size + offset);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	131 free(compressed);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	132 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	133
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	134 apng_state* start_apng(FILE *f, uint32_t width, uint32_t height, float frame_rate)
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	135 {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	136 write_header(f, width, height, COLOR_TRUE);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	137 apng_state *apng = calloc(1, sizeof(apng_state));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	138 uint8_t chunk[] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	139 0, 0, 0, 0,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	140 0, 0, 0, 1
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	141 };
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	142 apng->num_frame_offset = ftell(f) + 8;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	143 write_chunk(f, actl, chunk, sizeof(chunk));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	144 apng->delay_num = 65535.0f / frame_rate;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	145 apng->delay_den = frame_rate * apng->delay_num;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	146 return apng;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	147 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	148
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	149 void end_apng(FILE f, apng_state apng)
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	150 {
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	151 write_chunk(f, iend, NULL, 0);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	152 fseek(f, apng->num_frame_offset, SEEK_SET);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	153 uint8_t bytes[] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	154 apng->num_frames >> 24, apng->num_frames >> 16,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	155 apng->num_frames >> 8, apng->num_frames
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	156 };
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	157 fwrite(bytes, 1, sizeof(bytes), f);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	158 fclose(f);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	159 free(apng);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	160 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	161
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	162 void save_png24(FILE f, pixel_t buffer, uint32_t width, uint32_t height, uint32_t pitch)
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	163 {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	164 write_header(f, width, height, COLOR_TRUE);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	165 save_png24_frame(f, buffer, NULL, width, height, pitch);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	166 write_chunk(f, iend, NULL, 0);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	167 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	168
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	169 void save_png(FILE f, pixel_t buffer, uint32_t width, uint32_t height, uint32_t pitch)
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 {
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	171 pixel_t palette[256];
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 uint8_t pal_buffer[256*3];
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 uint32_t num_pal = 0;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 uint32_t index_size = (1 + width) * height;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	175 uint8_t *index_buffer = malloc(index_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 uint8_t *cur = index_buffer;
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	177 pixel_t *pixel = buffer;
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 for (uint32_t y = 0; y < height; y++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	179 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	180 //save filter type
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	181 *(cur++) = 0;
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	182 pixel_t *start = pixel;
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	183 for (uint32_t x = 0; x < width; x++, pixel++, cur++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	185 uint32_t value = (*pixel) & 0xFFFFFF;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 uint32_t i;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 for (i = 0; i < num_pal; i++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	188 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 if (palette[i] == value) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 break;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	191 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	192 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 if (i == num_pal) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	194 if (num_pal == 256) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 free(index_buffer);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 save_png24(f, buffer, width, height, pitch);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 return;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	199 palette[i] = value;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 num_pal++;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	201 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	202 *cur = i;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	203 }
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	204 pixel = start + pitch / sizeof(pixel_t);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	205 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	206 write_header(f, width, height, COLOR_INDEXED);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	207 cur = pal_buffer;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	208 for (uint32_t i = 0; i < num_pal; i++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 {
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	210 #ifdef USE_RGB565
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	211 *(cur++) = (palette[i] >> 8 & 0xF8) \| (palette[i] >> (8+5));
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	212 *(cur++) = (palette[i] >> 3 & 0xFC) \| (palette[i] >> (3+5) & 0x3);
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	213 *(cur++) = palette[i] << 3 \| (palette[i] >> (5-3) & 0x3);
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	214 #else
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	215 #ifdef USE_GLES
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	216 *(cur++) = palette[i];
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	217 *(cur++) = palette[i] >> 8;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	218 *(cur++) = palette[i] >> 16;
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	219 #else
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	220 *(cur++) = palette[i] >> 16;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	221 *(cur++) = palette[i] >> 8;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	222 *(cur++) = palette[i];
2685 da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	223 #endif
da2e06c42d16 Add a compile-time flag to use RGB565 instead of ABGR/ARGB Michael Pavone <pavone@retrodev.com> parents: 2346 diff changeset	224 #endif
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	225 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	226 write_chunk(f, plte, pal_buffer, num_pal * 3);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	227 uLongf compress_buffer_size = index_size + 5 * (index_size/16383 + 1) + 3;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	228 uint8_t *compressed = malloc(compress_buffer_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	229 compress(compressed, &compress_buffer_size, index_buffer, index_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	230 free(index_buffer);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	231 write_chunk(f, idat, compressed, compress_buffer_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	232 write_chunk(f, iend, NULL, 0);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	233 free(compressed);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	234 }
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	235
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	236 typedef uint8_t (filter_fun)(uint8_t cur, uint8_t *last, uint8_t bpp, uint32_t x);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	237 typedef uint32_t (pixel_fun)(uint8_t cur, uint8_t *last, uint8_t bpp, uint32_t x, filter_fun);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	238
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	239 static uint8_t filter_none(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	240 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	241 return *cur;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	242 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	243
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	244 static uint8_t filter_sub(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	245 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	246 if (x) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	247 return cur + (cur - bpp);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	248 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	249 return *cur;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	250 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	251 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	252
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	253 static uint8_t filter_up(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	254 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	255 if (last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	256 return cur + last;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	257 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	258 return *cur;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	259 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	260 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	261
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	262 static uint8_t filter_avg(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	263 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	264 uint8_t prev = x ? *(cur - bpp) : 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	265 uint8_t prior = last ? *last : 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	266 return *cur + ((prev + prior) >> 1);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	267 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	268
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	269 static uint8_t paeth(uint8_t a, uint8_t b, uint8_t c)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	270 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	271 int32_t p = a + b - c;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	272 int32_t pa = abs(p - a);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	273 int32_t pb = abs(p - b);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	274 int32_t pc = abs(p - c);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	275 if (pa <= pb && pa <= pc) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	276 return a;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	277 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	278 if (pb <= pc) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	279 return b;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	280 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	281 return c;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	282 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	283
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	284 static uint8_t filter_paeth(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	285 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	286 uint8_t prev, prev_prior;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	287 if (x) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	288 prev = *(cur - bpp);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	289 prev_prior = *(last - bpp);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	290 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	291 prev = prev_prior = 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	292 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	293 uint8_t prior = last ? *last : 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	294 return *cur + paeth(prev, prior, prev_prior);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	295 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	296
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	297 static uint32_t pixel_gray(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x, filter_fun filter)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	298 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	299 uint8_t value = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	300 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	301 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	302 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	303 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	304 return 0xFF000000 \| value << 16 \| value << 8 \| value;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	305 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	306
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	307 static uint32_t pixel_true(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x, filter_fun filter)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	308 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	309 uint8_t red = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	310 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	311 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	312 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	313 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	314 uint8_t green = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	315 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	316 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	317 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	318 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	319 uint8_t blue = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	320 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	321 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	322 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	323 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	324 return 0xFF000000 \| red << 16 \| green << 8 \| blue;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	325 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	326
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	327 static uint32_t pixel_gray_alpha(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x, filter_fun filter)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	328 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	329 uint8_t value = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	330 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	331 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	332 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	333 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	334 uint8_t alpha = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	335 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	336 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	337 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	338 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	339 return alpha << 24 \| value << 16 \| value << 8 \| value;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	340 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	341
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	342 static uint32_t pixel_true_alpha(uint8_t cur, uint8_t last, uint8_t bpp, uint32_t x, filter_fun filter)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	343 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	344 uint8_t red = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	345 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	346 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	347 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	348 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	349 uint8_t green = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	350 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	351 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	352 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	353 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	354 uint8_t blue = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	355 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	356 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	357 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	358 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	359 uint8_t alpha = *cur = filter(cur, *last, bpp, x);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	360 (*cur)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	361 if (*last) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	362 (*last)++;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	363 }
2346 0111c8344477 Fix some issues identified by asan/ubsan Michael Pavone <pavone@retrodev.com> parents: 2295 diff changeset	364 return ((uint32_t)alpha) << 24 \| red << 16 \| green << 8 \| blue;
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	365 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	366
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	367 static filter_fun filters[] = {filter_none, filter_sub, filter_up, filter_avg, filter_paeth};
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	368
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	369 #define MIN_CHUNK_SIZE 12
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	370 #define MIN_IHDR_SIZE 0xD
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	371 #define MAX_SUPPORTED_DIM 32767 //chosen to avoid possibility of overflow when calculating uncompressed size
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	372 uint32_t load_png(uint8_t buffer, uint32_t buf_size, uint32_t width, uint32_t height)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	373 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	374 if (buf_size < sizeof(png_magic) \|\| memcmp(buffer, png_magic, sizeof(png_magic))) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	375 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	376 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	377 uint32_t cur = sizeof(png_magic);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	378 uint8_t has_header = 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	379 uint8_t bits, color_type, comp_type, filter_type, interlace;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	380 uint8_t *idat_buf = NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	381 uint8_t idat_needs_free = 0;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	382 uint32_t idat_size;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	383 uint32_t *out = NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	384 uint32_t *palette = NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	385 while(cur + MIN_CHUNK_SIZE <= buf_size)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	386 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	387 uint32_t chunk_size = buffer[cur++] << 24;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	388 chunk_size \|= buffer[cur++] << 16;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	389 chunk_size \|= buffer[cur++] << 8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	390 chunk_size \|= buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	391 if (!memcmp(ihdr, buffer + cur, sizeof(ihdr))) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	392 if (chunk_size < MIN_IHDR_SIZE \|\| cur + MIN_IHDR_SIZE > buf_size) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	393 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	394 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	395 cur += sizeof(ihdr);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	396 *width = buffer[cur++] << 24;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	397 *width \|= buffer[cur++] << 16;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	398 *width \|= buffer[cur++] << 8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	399 *width \|= buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	400 *height = buffer[cur++] << 24;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	401 *height \|= buffer[cur++] << 16;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	402 *height \|= buffer[cur++] << 8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	403 *height \|= buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	404 if (width > MAX_SUPPORTED_DIM \|\| height > MAX_SUPPORTED_DIM) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	405 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	406 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	407 bits = buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	408 if (bits != 8) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	409 //only support 8-bits per element for now
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	410 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	411 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	412 color_type = buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	413 if (color_type > COLOR_TRUE_ALPHA \|\| color_type == 1 \|\| color_type == 5) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	414 //reject invalid color type
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	415 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	416 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	417 comp_type = buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	418 if (comp_type) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	419 //only compression type 0 is defined by the spec
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	420 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	421 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	422 filter_type = buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	423 interlace = buffer[cur++];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	424 if (interlace) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	425 //interlacing not supported for now
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	426 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	427 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	428 cur += chunk_size - MIN_IHDR_SIZE;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	429 has_header = 1;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	430 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	431 if (!has_header) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	432 //IHDR is required to be the first chunk, fail if it isn't
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	433 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	434 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	435 if (!memcmp(plte, buffer + cur, sizeof(plte))) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	436 //TODO: implement paletted images
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	437 } else if (!memcmp(idat, buffer + cur, sizeof(idat))) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	438 cur += sizeof(idat);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	439 if (idat_buf) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	440 if (idat_needs_free) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	441 idat_buf = realloc(idat_buf, idat_size + chunk_size);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	442 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	443 uint8_t *tmp = idat_buf;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	444 idat_buf = malloc(idat_size + chunk_size);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	445 memcpy(idat_buf, tmp, idat_size);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	446 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	447 memcpy(idat_buf + idat_size, buffer + cur, chunk_size);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	448 idat_size += chunk_size;
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	449 idat_needs_free = 1;
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	450 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	451 idat_buf = buffer + cur;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	452 idat_size = chunk_size;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	453 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	454 cur += chunk_size;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	455 } else if (!memcmp(iend, buffer + cur, sizeof(iend))) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	456 if (!idat_buf) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	457 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	458 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	459 if (!palette && color_type == COLOR_INDEXED) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	460 //indexed color, but no PLTE chunk found
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	461 return NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	462 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	463 uLongf uncompressed_size = width *height;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	464 uint8_t bpp;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	465 pixel_fun pixel;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	466 switch (color_type)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	467 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	468 case COLOR_GRAY:
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	469 uncompressed_size *= bits / 8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	470 bpp = bits/8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	471 pixel = pixel_gray;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	472 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	473 case COLOR_TRUE:
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	474 uncompressed_size = 3 bits / 8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	475 bpp = 3 * bits/8;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	476 pixel = pixel_true;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	477 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	478 case COLOR_INDEXED: {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	479 uint32_t pixels_per_byte = 8 / bits;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	480 uncompressed_size = (width / pixels_per_byte) *height;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	481 if (*width % pixels_per_byte) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	482 uncompressed_size += *height;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	483 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	484 bpp = 1;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	485 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	486 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	487 case COLOR_GRAY_ALPHA:
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	488 uncompressed_size *= bits / 4;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	489 bpp = bits / 4;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	490 pixel = pixel_gray_alpha;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	491 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	492 case COLOR_TRUE_ALPHA:
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	493 uncompressed_size *= bits / 2;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	494 bpp = bits / 2;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	495 pixel = pixel_true_alpha;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	496 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	497 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	498 //add filter type byte
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	499 uncompressed_size += *height;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	500 uint8_t *decomp_buffer = malloc(uncompressed_size);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	501 if (Z_OK != uncompress(decomp_buffer, &uncompressed_size, idat_buf, idat_size)) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	502 free(decomp_buffer);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	503 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	504 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	505 out = calloc(width *height, sizeof(uint32_t));
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	506 uint32_t *cur_pixel = out;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	507 uint8_t *cur_byte = decomp_buffer;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	508 uint8_t *last_line = NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	509 for (uint32_t y = 0; y < *height; y++)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	510 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	511 uint8_t filter_type = *(cur_byte++);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	512 if (filter_type >= sizeof(filters)/sizeof(*filters)) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	513 free(out);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	514 out = NULL;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	515 free(decomp_buffer);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	516 break;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	517 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	518 filter_fun filter = filters[filter_type];
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	519 uint8_t *line_start = cur_byte;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	520 for (uint32_t x = 0; x < *width; x++)
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	521 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	522 *(cur_pixel++) = pixel(&cur_byte, &last_line, bpp, x, filter);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	523 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	524 last_line = line_start;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	525 }
1592 31effaadf877 Fix some memory errors (mostly leaks) identified by valgrind Michael Pavone <pavone@retrodev.com> parents: 1569 diff changeset	526 free(decomp_buffer);
1569 0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	527 } else {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	528 //skip uncrecognized chunks
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	529 cur += 4 + chunk_size;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	530 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	531 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	532 //skip CRC for now
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	533 cur += sizeof(uint32_t);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	534 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	535 if (idat_needs_free) {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	536 free(idat_buf);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	537 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	538 free(palette);
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	539 return out;
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	540 }

Mercurial > repos > blastem

annotate png.c @ 2688:b42f00a3a937 default tip