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#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;
}
}
}
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