SDLGLES initial import

[sdlhildon] / sdlgles / test / gles1.c

diff --git a/sdlgles/test/gles1.c b/sdlgles/test/gles1.c
new file mode 100644 (file)
index 0000000..704031a
--- /dev/null
+++ b/sdlgles/test/gles1.c
@@ -0,0 +1,98 @@
+/* gles1 - a simple SDL_gles OpenGL|ES 1.1 sample
+ *
+ * This file is in the public domain, furnished "as is", without technical
+ * support, and with no warranty, express or implied, as to its usefulness for
+ * any purpose.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <assert.h>
+
+#include <SDL.h>
+#include <SDL_gles.h>
+
+#include <GLES/gl.h>
+
+static SDL_Surface *screen;
+static SDL_GLES_Context *context;
+
+static float box_step = 0.1f;
+
+static const float w = 0.28f, h = 0.4f;
+static float x = -1.0f, y = 0.0f;
+static float box_v[4*3];
+
+static Uint32 tick(Uint32 interval, void* param)
+{
+       SDL_Event e;
+       e.type = SDL_VIDEOEXPOSE;
+
+       x += box_step;
+       if (x >= 1.0f || x <= -1.0f) {
+               box_step *= -1.0f;
+       }
+
+       const float x1 = x - w/2, y1 = y - h/2;
+       const float x2 = x + w/2, y2 = y + h/2;
+       const float z = 0.5f;
+       box_v[0] = x1; box_v[1] = y1;  box_v[2] = z;
+       box_v[3] = x2; box_v[4] = y1;  box_v[5] = z;
+       box_v[6] = x1; box_v[7] = y2;  box_v[8] = z;
+       box_v[9] = x2; box_v[10] = y2; box_v[11] = z;
+
+       SDL_PushEvent(&e);
+
+       return interval;
+}
+
+int main()
+{
+       int res;
+       res = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
+       assert(res == 0);
+
+       res = SDL_GLES_Init(SDL_GLES_VERSION_1_1);
+       assert(res == 0);
+
+       screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE);
+       assert(screen);
+
+       SDL_TimerID timer = SDL_AddTimer(10, tick, NULL);
+       assert(timer != NULL);
+
+       context = SDL_GLES_CreateContext();
+       assert(context);
+
+       SDL_GLES_MakeCurrent(context);
+       
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+
+       glClearColor(0.0f, 0.0f, 1.0f, 0.0f);
+       glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
+       glEnableClientState(GL_VERTEX_ARRAY);
+       glVertexPointer(3, GL_FLOAT, 0, box_v);
+
+       SDL_Event event;
+       while (SDL_WaitEvent(&event)) {
+               switch (event.type) {
+                       case SDL_QUIT:
+                               goto quit;
+                       case SDL_VIDEOEXPOSE:
+                               glClear(GL_COLOR_BUFFER_BIT);
+                               glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+                               SDL_GLES_SwapBuffers();
+                               break;
+               }
+       }
+
+quit:
+       SDL_GLES_DeleteContext(context);
+
+       SDL_GLES_Quit();
+       SDL_Quit();
+
+       return 0;
+}