1 files changed, 102 insertions, 0 deletions
diff --git a/render_sdl.c b/render_sdl.c
new file mode 100644
index 0000000..f2f15c0
--- /dev/null
+++ b/render_sdl.c
@@ -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;
+		}
+	}
+}
+