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comparison render_sdl.c @ 20:f664eeb55cb4

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Mostly broken VDP core and savestate viewer
author Mike Pavone <pavone@retrodev.com>
date Sat, 08 Dec 2012 02:00:54 -0800
parents
children 037963b4c92d
comparison
equal deleted inserted replaced
19:4717146a7606 20:f664eeb55cb4
1 #include <SDL.h>
2 #include <stdlib.h>
3 #include <stdio.h>
4 #include "render.h"
5
6 SDL_Surface *screen;
7
8 void render_init()
9 {
10 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
11 fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
12 exit(1);
13 }
14 atexit(SDL_Quit);
15 screen = SDL_SetVideoMode(320, 240, 32, SDL_SWSURFACE | SDL_ANYFORMAT);
16 if (!screen) {
17 fprintf(stderr, "Unable to get SDL surface: %s\n", SDL_GetError());
18 exit(1);
19 }
20 if (screen->format->BytesPerPixel < 2) {
21 fprintf(stderr, "BlastEm requires at least a 16-bit surface, SDL returned a %d-bit surface\n", screen->format->BytesPerPixel * 8);
22 exit(1);
23 }
24 }
25
26 void render_context(vdp_context * context)
27 {
28 uint8_t *buf_8;
29 uint16_t *buf_16;
30 uint32_t *buf_32;
31 uint8_t b,g,r;
32 if (SDL_MUSTLOCK(screen)) {
33 if (SDL_LockSurface(screen) < 0) {
34 return;
35 }
36 }
37 switch (screen->format->BytesPerPixel) {
38 case 2:
39 buf_16 = (uint16_t *)screen->pixels;
40 for (int y = 0; y < 240; y++, buf_16 += (screen->pitch/2 - 320)) {
41 for (int x = 0; x < 320; x++, buf_16++) {
42 uint16_t gen_color = context->framebuf[y * 320 + x];
43 b = ((gen_color >> 8) & 0xE) * 18;
44 g = ((gen_color >> 4) & 0xE) * 18;
45 r = (gen_color& 0xE) * 18;
46 *buf_16 = SDL_MapRGB(screen->format, r, g, b);
47 }
48 }
49 break;
50 case 3:
51 buf_8 = (uint8_t *)screen->pixels;
52 for (int y = 0; y < 240; y++, buf_8 += (screen->pitch - 320)) {
53 for (int x = 0; x < 320; x++, buf_8 += 3) {
54 uint16_t gen_color = context->framebuf[y * 320 + x];
55 b = ((gen_color >> 8) & 0xE) * 18;
56 g = ((gen_color >> 4) & 0xE) * 18;
57 r = (gen_color& 0xE) * 18;
58 *(buf_8+screen->format->Rshift/8) = r;
59 *(buf_8+screen->format->Gshift/8) = g;
60 *(buf_8+screen->format->Bshift/8) = b;
61 }
62 }
63 break;
64 case 4:
65 buf_32 = (uint32_t *)screen->pixels;
66 for (int y = 0; y < 224; y++, buf_32 += (screen->pitch/4 - 320)) {
67 for (int x = 0; x < 320; x++, buf_32++) {
68 uint16_t gen_color = context->framebuf[y * 320 + x];
69 b = ((gen_color >> 8) & 0xE) * 18;
70 g = ((gen_color >> 4) & 0xE) * 18;
71 r = (gen_color& 0xE) * 18;
72 *buf_32 = SDL_MapRGB(screen->format, r, g, b);
73 }
74 }
75 for (int y = 224; y < 240; y++, buf_32 += (screen->pitch/4 - 320)) {
76 for (int x = 0; x < 320; x++, buf_32++) {
77 uint16_t gen_color = context->cram[x/10 + ((y-224)/8)*32];
78 b = ((gen_color >> 8) & 0xE) * 18;
79 g = ((gen_color >> 4) & 0xE) * 18;
80 r = (gen_color& 0xE) * 18;
81 *buf_32 = SDL_MapRGB(screen->format, r, g, b);
82 }
83 }
84 break;
85 }
86 if ( SDL_MUSTLOCK(screen) ) {
87 SDL_UnlockSurface(screen);
88 }
89 SDL_UpdateRect(screen, 0, 0, 320, 240);
90 }
91
92 void render_wait_quit()
93 {
94 SDL_Event event;
95 while(SDL_WaitEvent(&event)) {
96 switch (event.type) {
97 case SDL_QUIT:
98 return;
99 }
100 }
101 }
102