Mercurial > repos > blastem
diff render_sdl.c @ 20:f664eeb55cb4
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 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/render_sdl.c Sat Dec 08 02:00:54 2012 -0800 @@ -0,0 +1,102 @@ +#include <SDL.h> +#include <stdlib.h> +#include <stdio.h> +#include "render.h" + +SDL_Surface *screen; + +void render_init() +{ + if (SDL_Init(SDL_INIT_VIDEO) < 0) { + fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError()); + exit(1); + } + atexit(SDL_Quit); + screen = SDL_SetVideoMode(320, 240, 32, SDL_SWSURFACE | SDL_ANYFORMAT); + if (!screen) { + fprintf(stderr, "Unable to get SDL surface: %s\n", SDL_GetError()); + exit(1); + } + if (screen->format->BytesPerPixel < 2) { + fprintf(stderr, "BlastEm requires at least a 16-bit surface, SDL returned a %d-bit surface\n", screen->format->BytesPerPixel * 8); + exit(1); + } +} + +void render_context(vdp_context * context) +{ + uint8_t *buf_8; + uint16_t *buf_16; + uint32_t *buf_32; + uint8_t b,g,r; + if (SDL_MUSTLOCK(screen)) { + if (SDL_LockSurface(screen) < 0) { + return; + } + } + switch (screen->format->BytesPerPixel) { + case 2: + buf_16 = (uint16_t *)screen->pixels; + for (int y = 0; y < 240; y++, buf_16 += (screen->pitch/2 - 320)) { + for (int x = 0; x < 320; x++, buf_16++) { + uint16_t gen_color = context->framebuf[y * 320 + x]; + b = ((gen_color >> 8) & 0xE) * 18; + g = ((gen_color >> 4) & 0xE) * 18; + r = (gen_color& 0xE) * 18; + *buf_16 = SDL_MapRGB(screen->format, r, g, b); + } + } + break; + case 3: + buf_8 = (uint8_t *)screen->pixels; + for (int y = 0; y < 240; y++, buf_8 += (screen->pitch - 320)) { + for (int x = 0; x < 320; x++, buf_8 += 3) { + uint16_t gen_color = context->framebuf[y * 320 + x]; + b = ((gen_color >> 8) & 0xE) * 18; + g = ((gen_color >> 4) & 0xE) * 18; + r = (gen_color& 0xE) * 18; + *(buf_8+screen->format->Rshift/8) = r; + *(buf_8+screen->format->Gshift/8) = g; + *(buf_8+screen->format->Bshift/8) = b; + } + } + break; + case 4: + buf_32 = (uint32_t *)screen->pixels; + for (int y = 0; y < 224; y++, buf_32 += (screen->pitch/4 - 320)) { + for (int x = 0; x < 320; x++, buf_32++) { + uint16_t gen_color = context->framebuf[y * 320 + x]; + b = ((gen_color >> 8) & 0xE) * 18; + g = ((gen_color >> 4) & 0xE) * 18; + r = (gen_color& 0xE) * 18; + *buf_32 = SDL_MapRGB(screen->format, r, g, b); + } + } + for (int y = 224; y < 240; y++, buf_32 += (screen->pitch/4 - 320)) { + for (int x = 0; x < 320; x++, buf_32++) { + uint16_t gen_color = context->cram[x/10 + ((y-224)/8)*32]; + b = ((gen_color >> 8) & 0xE) * 18; + g = ((gen_color >> 4) & 0xE) * 18; + r = (gen_color& 0xE) * 18; + *buf_32 = SDL_MapRGB(screen->format, r, g, b); + } + } + break; + } + if ( SDL_MUSTLOCK(screen) ) { + SDL_UnlockSurface(screen); + } + SDL_UpdateRect(screen, 0, 0, 320, 240); +} + +void render_wait_quit() +{ + SDL_Event event; + while(SDL_WaitEvent(&event)) { + switch (event.type) { + case SDL_QUIT: + return; + } + } +} +