repos/blastem: png.c annotate

annotate png.c @ 2496:187bc857a76a default tip

Fix bug in MED mapper protection bit implementation

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 28 Apr 2024 23:33:11 -0700
parents	0111c8344477
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
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	63 void save_png24_frame(FILE f, uint32_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);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	67 uint32_t *pixel = buffer;
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;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	73 uint32_t *start = pixel;
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 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	76 uint32_t value = *pixel;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	77 *(cur++) = value >> 16;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	78 *(cur++) = value >> 8;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	79 *(cur++) = value;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	80 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	81 pixel = start + pitch / sizeof(uint32_t);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	82 }
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	83
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	84 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	85 uint32_t offset = 0;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	86 if (apng) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	87 uint8_t chunk[26] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	88 apng->sequence_number >> 24, apng->sequence_number >> 16,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	89 apng->sequence_number >> 8, apng->sequence_number,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	90 width >> 24, width >> 16, width >> 8, width,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	91 height >> 24, height >> 16, height >> 8, height,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	92 0, 0, 0, 0, //x offset
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	93 0, 0, 0, 0, //y offset
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	94 apng->delay_num >> 8, apng->delay_num,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	95 apng->delay_den >> 8, apng->delay_den,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	96 0, 0 //dispose and blend ops
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	97 };
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	98 write_chunk(f, fctl, chunk, sizeof(chunk));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	99 apng->sequence_number++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	100 apng->num_frames++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	101 if (apng->sequence_number > 1) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	102 offset = sizeof(uint32_t);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	103 compress_buffer_size += offset;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	104 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	105 }
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	106 uint8_t *compressed = malloc(compress_buffer_size);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	107 compress_buffer_size -= offset;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	108 compress(compressed + offset, &compress_buffer_size, idat_buffer, idat_size);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	109 free(idat_buffer);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	110 if (offset) {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	111 cur = compressed;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	112 *(cur++) = apng->sequence_number >> 24;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	113 *(cur++) = apng->sequence_number >> 16;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	114 *(cur++) = apng->sequence_number >> 8;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	115 *(cur++) = apng->sequence_number;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	116 apng->sequence_number++;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	117 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	118 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	119 free(compressed);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	120 }
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	121
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	122 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	123 {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	124 write_header(f, width, height, COLOR_TRUE);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	125 apng_state *apng = calloc(1, sizeof(apng_state));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	126 uint8_t chunk[] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	127 0, 0, 0, 0,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	128 0, 0, 0, 1
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 apng->num_frame_offset = ftell(f) + 8;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	131 write_chunk(f, actl, chunk, sizeof(chunk));
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	132 apng->delay_num = 65535.0f / frame_rate;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	133 apng->delay_den = frame_rate * apng->delay_num;
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	134 return apng;
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
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	137 void end_apng(FILE f, apng_state apng)
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	138 {
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	139 write_chunk(f, iend, NULL, 0);
2295 eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	140 fseek(f, apng->num_frame_offset, SEEK_SET);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	141 uint8_t bytes[] = {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	142 apng->num_frames >> 24, apng->num_frames >> 16,
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	143 apng->num_frames >> 8, apng->num_frames
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	144 };
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	145 fwrite(bytes, 1, sizeof(bytes), f);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	146 fclose(f);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	147 free(apng);
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
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	150 void save_png24(FILE f, uint32_t buffer, uint32_t width, uint32_t height, uint32_t pitch)
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	151 {
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	152 write_header(f, width, height, COLOR_TRUE);
eb45ad9d8a3f WIP "video" recording in APNG format Michael Pavone <pavone@retrodev.com> parents: 2019 diff changeset	153 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	154 write_chunk(f, iend, NULL, 0);
1532 b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	155 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	156
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	157 void save_png(FILE f, uint32_t buffer, uint32_t width, uint32_t height, uint32_t pitch)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	158 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	159 uint32_t palette[256];
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	160 uint8_t pal_buffer[256*3];
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	161 uint32_t num_pal = 0;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	162 uint32_t index_size = (1 + width) * height;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	163 uint8_t *index_buffer = malloc(index_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	164 uint8_t *cur = index_buffer;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	165 uint32_t *pixel = buffer;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	166 for (uint32_t y = 0; y < height; y++)
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 //save filter type
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 *(cur++) = 0;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 uint32_t *start = pixel;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	171 for (uint32_t x = 0; x < width; x++, pixel++, cur++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 uint32_t value = (*pixel) & 0xFFFFFF;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 uint32_t i;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	175 for (i = 0; i < num_pal; i++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	177 if (palette[i] == value) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 break;
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 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	181 if (i == num_pal) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	182 if (num_pal == 256) {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	183 free(index_buffer);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 save_png24(f, buffer, width, height, pitch);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	185 return;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 palette[i] = value;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	188 num_pal++;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 *cur = i;
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 pixel = start + pitch / sizeof(uint32_t);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 }
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	194 write_header(f, width, height, COLOR_INDEXED);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 cur = pal_buffer;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 for (uint32_t i = 0; i < num_pal; i++)
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 {
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 *(cur++) = palette[i] >> 16;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	199 *(cur++) = palette[i] >> 8;
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 *(cur++) = palette[i];
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 write_chunk(f, plte, pal_buffer, num_pal * 3);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	203 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	204 uint8_t *compressed = malloc(compress_buffer_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	205 compress(compressed, &compress_buffer_size, index_buffer, index_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	206 free(index_buffer);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	207 write_chunk(f, idat, compressed, compress_buffer_size);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	208 write_chunk(f, iend, NULL, 0);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 free(compressed);
b505083dcd87 Added png screenshot support Michael Pavone <pavone@retrodev.com> parents: diff changeset	210 }
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	211
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	212 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	213 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	214
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	215 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	216 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	217 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	218 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	219
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	220 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	221 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	222 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	223 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	224 } 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	225 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	226 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	227 }
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	228
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	229 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	230 {
0ec89dadb36d Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI Michael Pavone <pavone@retrodev.com> parents: 1532 diff changeset	231 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	232 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	233 } 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	234 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	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 }
0ec89dadb36d Add 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
0ec89dadb36d Add 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 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	239 {
0ec89dadb36d Add 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 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	241 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	242 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	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
0ec89dadb36d Add 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 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	246 {
0ec89dadb36d Add 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 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	248 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	249 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	250 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	251 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	252 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	253 }
0ec89dadb36d Add 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 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	255 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	256 }
0ec89dadb36d Add 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 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	258 }
0ec89dadb36d Add 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 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	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 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	263 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	264 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	265 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	266 } 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	267 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	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 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	270 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	271 }
0ec89dadb36d Add 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
0ec89dadb36d Add 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 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	274 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	275 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	276 (*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	277 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	278 (*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	279 }
0ec89dadb36d Add 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 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	281 }
0ec89dadb36d Add 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 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	284 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	285 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	286 (*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	287 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	288 (*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	289 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	290 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	291 (*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	292 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	293 (*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	294 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	295 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	296 (*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	297 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	298 (*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	299 }
0ec89dadb36d Add 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 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	301 }
0ec89dadb36d Add 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
0ec89dadb36d Add 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 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	304 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	305 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	306 (*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	307 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	308 (*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	309 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	310 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	311 (*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	312 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	313 (*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	314 }
0ec89dadb36d Add 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 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	316 }
0ec89dadb36d Add 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
0ec89dadb36d Add 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 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	319 {
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	320 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	321 (*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	322 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	323 (*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	324 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	325 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	326 (*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	327 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	328 (*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	329 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	330 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	331 (*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	332 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	333 (*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	334 }
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	335 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	336 (*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	337 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	338 (*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	339 }
2346 0111c8344477 Fix some issues identified by asan/ubsan Michael Pavone <pavone@retrodev.com> parents: 2295 diff changeset	340 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	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
0ec89dadb36d Add 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 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	344
0ec89dadb36d Add 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 #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	346 #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	347 #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	348 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	349 {
0ec89dadb36d Add 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 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	351 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	352 }
0ec89dadb36d Add 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 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	354 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	355 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	356 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	357 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	358 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	359 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	360 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	361 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	362 {
0ec89dadb36d Add 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 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	364 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	365 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	366 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	367 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	368 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	369 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	370 }
0ec89dadb36d Add 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 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	372 *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	373 *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	374 *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	375 *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	376 *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	377 *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	378 *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	379 *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	380 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	381 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	382 }
0ec89dadb36d Add 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 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	384 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	385 //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	386 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	387 }
0ec89dadb36d Add 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 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	389 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	390 //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	391 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	392 }
0ec89dadb36d Add 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 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	394 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	395 //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	396 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	397 }
0ec89dadb36d Add 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 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	399 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	400 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	401 //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	402 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	403 }
0ec89dadb36d Add 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 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	405 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	406 } 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	407 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	408 //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	409 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	410 }
0ec89dadb36d Add 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 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	412 //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	413 } 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	414 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	415 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	416 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	417 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	418 } 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	419 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	420 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	421 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	422 }
0ec89dadb36d Add 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 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	424 idat_size += chunk_size;
2019 81eebbe6b2e3 Fix some bugs in PNG decoder Michael Pavone <pavone@retrodev.com> parents: 1592 diff changeset	425 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	426 } 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	427 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	428 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	429 }
0ec89dadb36d Add 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 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	431 } 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	432 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	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 (!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	436 //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	437 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	438 }
0ec89dadb36d Add 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 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	440 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	441 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	442 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	443 {
0ec89dadb36d Add 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 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	445 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	446 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	447 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	448 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	449 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	450 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	451 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	452 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	453 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	454 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	455 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	456 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	457 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	458 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	459 }
0ec89dadb36d Add 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 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	461 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	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 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	464 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	465 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	466 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	467 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	468 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	469 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	470 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	471 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	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 }
0ec89dadb36d Add 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 //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	475 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	476 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	477 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	478 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	479 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	480 }
0ec89dadb36d Add 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 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	482 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	483 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	484 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	485 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	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 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	488 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	489 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	490 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	491 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	492 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	493 }
0ec89dadb36d Add 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 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	495 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	496 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	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 *(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	499 }
0ec89dadb36d Add 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 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	501 }
1592 31effaadf877 Fix some memory errors (mostly leaks) identified by valgrind Michael Pavone <pavone@retrodev.com> parents: 1569 diff changeset	502 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	503 } 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	504 //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	505 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	506 }
0ec89dadb36d Add 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 }
0ec89dadb36d Add 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 //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	509 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	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 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	512 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	513 }
0ec89dadb36d Add 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 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	515 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	516 }

Mercurial > repos > blastem

annotate png.c @ 2496:187bc857a76a default tip