Add sdl_gfx_primitives.c to git.

tests/sdl_gfx_primitives.c

@@ -0,0 +1,46 @@
+#include "SDL/SDL.h"
+#include "SDL/SDL_gfxPrimitives.h"
+
+#ifdef EMSCRIPTEN
+#include "emscripten.h"
+#endif
+
+int main(int argc, char **argv) {
+    SDL_Init(SDL_INIT_VIDEO);
+
+    const int width = 400;
+    const int height = 400;
+    SDL_Surface *screen = SDL_SetVideoMode(width, height, 32, SDL_SWSURFACE);
+    boxColor(screen, 0, 0, width, height, 0xff);
+
+    boxColor(screen, 0, 0, 98, 98, 0xff0000ff);
+    boxRGBA(screen, 100, 0, 198, 98, 0, 0, 0xff, 0xff);
+    // check that the x2 > x1 case is handled correctly
+    boxColor(screen, 298, 98, 200, 0, 0x00ff00ff);
+    boxColor(screen, 398, 98, 300, 0, 0xff0000ff);
+
+    rectangleColor(screen, 0, 100, 98, 198, 0x000ffff);
+    rectangleRGBA(screen, 100, 100, 198, 198, 0xff, 0, 0, 0xff);
+
+    ellipseColor(screen, 300, 150, 99, 49, 0x00ff00ff);
+    filledEllipseColor(screen, 100, 250, 99, 49, 0x00ff00ff);
+    filledEllipseRGBA(screen, 250, 300, 49, 99, 0, 0, 0xff, 0xff);
+
+    lineColor(screen, 300, 200, 400, 300, 0x00ff00ff);
+    lineRGBA(screen, 300, 300, 400, 400, 0, 0xff, 0, 0xff);
+
+    SDL_UpdateRect(screen, 0, 0, 0, 0);
+
+#ifndef EMSCRIPTEN
+    SDL_Event evt;
+    SDL_SaveBMP(screen, "native_output.bmp");
+    while (1) {
+       if (SDL_PollEvent(&evt) != 0 && evt.type == SDL_QUIT) break;
+       SDL_Delay(33);
+    }
+#endif
+
+    SDL_Quit();
+
+    return 1;
+}