drasticaly optimize flipping

3 files changed, 50 insertions, 4 deletions

diff --git a/src/main.c b/src/main.c
index 2ed9528..43c5d09 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,12 +6,18 @@
 int
 main(void)
 {
-	if (TZR_Init(128, 128, 60, true, false, false, false, false, "px"))
+	if (TZR_Init(128, 128, 60, .mixer=false))
 		return 1;
 	if (atexit(TZR_Quit)) {
 		TZR_Quit();
 		return 1;
 	}
+	if (pxInit())
+		return 1;
+	if (atexit(pxDeinit)) {
+		pxDeinit();
+		return 1;
+	}
 	srand(time(NULL));
 
 	PxSpr spr = {
diff --git a/src/px.c b/src/px.c
index 0a601fe..ff31ddc 100644
--- a/src/px.c
+++ b/src/px.c
@@ -29,20 +29,53 @@ static struct {
 	int w;
 	int h;
 } pxclip = {0, 0, PX_WIDTH, PX_HEIGHT};
+static SDL_Texture *pxtexture = NULL;
+
+int
+pxInit(void)
+{
+	pxtexture = SDL_CreateTexture(___tzr_renderer,
+	                              SDL_PIXELFORMAT_ARGB8888,
+	                              SDL_TEXTUREACCESS_STREAMING,
+	                              PX_WIDTH, PX_HEIGHT);
+	if (pxtexture == NULL) {
+		fprintf(stderr, "%s\n", SDL_GetError());
+		return 1;
+	}
+	return 0;
+}
+
+void
+pxDeinit(void)
+{
+	if (pxtexture != NULL) {
+		SDL_DestroyTexture(pxtexture);
+		pxtexture = NULL;
+	}
+}
 
 void
 pxFlip(void)
 {
+	uint8_t *pixels = NULL;
+	int pitch = 0;
+	SDL_LockTexture(pxtexture, NULL, (void **)&pixels, &pitch);
+
 	for (int y = 0; y < PX_HEIGHT; y++) {
 		for (int x = 0; x < PX_WIDTH; x++) {
+			const int ix = x << 2;
 			PxCol col = pxbuf[x + y * PX_WIDTH];
 			if (pxpal[col].spal)
 				col = pxpal[col].spal - 1;
-			TZR_DrawSetColor8(pxpal[col].r, pxpal[col].g,
-			                  pxpal[col].b, 255);
-			TZR_DrawPoint(x, y);
+			pixels[ix + y * pitch + 0] = pxpal[col].b;
+			pixels[ix + y * pitch + 1] = pxpal[col].g;
+			pixels[ix + y * pitch + 2] = pxpal[col].r;
+			pixels[ix + y * pitch + 3] = 255;
 		}
 	}
+
+	SDL_UnlockTexture(pxtexture);
+	SDL_RenderCopy(___tzr_renderer, pxtexture, NULL, NULL);
 }
 
 void
diff --git a/src/px.h b/src/px.h
index c70db81..d7f7dee 100644
--- a/src/px.h
+++ b/src/px.h
@@ -50,6 +50,13 @@ typedef struct {
 extern PxCol pxbuf[PX_WIDTH * PX_HEIGHT];
 extern PxPal pxpal[256];
 
+/* Return -1 on error. Should be called after TZR_Init. */
+int pxInit(void);
+
+/* Should be called before TZR_Quit. */
+void pxDeinit(void);
+
+/* Should be called between TZR_DrawBegin and TZR_DrawEnd. */
 void pxFlip(void);
 
 /*** DRAW ***/