added sdl_gles_get/setattribute calls

[sdlhildon] / sdlgles / test / attrib.c

diff --git a/sdlgles/test/attrib.c b/sdlgles/test/attrib.c
new file mode 100644 (file)
index 0000000..6e6a8a5
--- /dev/null
+++ b/sdlgles/test/attrib.c
@@ -0,0 +1,142 @@
+/* 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 bool fullscreen = false;
+
+static const float vertices[] ={-0.6f, -0.6f, -0.5f, /* Square 1 */
+                                                                0.3f, -0.6f, -0.5f,
+                                                               -0.6f,  0.8f,  0.1f,
+                                                                0.3f,  0.8f,  0.1f,
+                                                                0.3f,  0.8f,  0.1f, /* Degenerate vertices */
+                                                               -0.3f, -0.6f,  0.5f,
+                                                               -0.3f, -0.6f,  0.5f, /* Square 2 */
+                                                                0.6f, -0.6f,  0.5f,
+                                                               -0.3f,  0.8f, -0.1f,
+                                                                0.6f,  0.8f, -0.1f,
+                                                               };
+static const float colors[] =  { 1.0f,  0.0f,  0.0f, 1.0f,
+                                                                1.0f,  0.0f,  0.0f, 1.0f,
+                                                                1.0f,  0.0f,  0.0f, 1.0f,
+                                                                1.0f,  0.0f,  0.0f, 1.0f,
+                                                                0.0f,  0.0f,  0.0f, 1.0f,
+                                                                0.0f,  0.0f,  1.0f, 1.0f,
+                                                                0.0f,  0.0f,  1.0f, 1.0f,
+                                                                0.0f,  0.0f,  1.0f, 1.0f,
+                                                                0.0f,  0.0f,  1.0f, 1.0f,
+                                                                0.0f,  0.0f,  1.0f, 1.0f,
+                                                               };
+
+static void draw()
+{
+       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+       glDrawArrays(GL_TRIANGLE_STRIP, 0, 10);
+       SDL_GLES_SwapBuffers();
+}
+
+static void toggle_fullscreen()
+{
+       int res;
+
+       fullscreen = !fullscreen;
+
+       screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE |
+               (fullscreen ? SDL_FULLSCREEN : 0));
+       assert(screen);
+
+       res = SDL_GLES_SetVideoMode();
+       assert(res == 0);
+
+       draw();
+}
+
+int main()
+{
+       int res, value = 0;
+       res = SDL_Init(SDL_INIT_VIDEO);
+       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_WM_SetCaption("SDLgles attrib test", "SDLgles v1 test");
+       SDL_ShowCursor(SDL_DISABLE);
+
+#define ENABLE_DEPTH_BUFFER 1
+
+#ifdef ENABLE_DEPTH_BUFFER
+       /* With a depth buffer, the red square will be partially over the blue sq. */
+       res = SDL_GLES_SetAttribute(SDL_GLES_DEPTH_SIZE, 4);
+       assert(res == 0);
+
+       res = SDL_GLES_GetAttribute(SDL_GLES_DEPTH_SIZE, &value);
+       assert(res == 0);
+       assert(value == 4);
+       printf("Wanted depth buffer size is %d\n", value);
+#else
+       /* Without a depth buffer, the blue square will be over the red square. */
+       printf("Wanted depth buffer size is %d\n", 0);
+#endif
+
+       context = SDL_GLES_CreateContext();
+       assert(context);
+
+       res = SDL_GLES_MakeCurrent(context);
+       assert(res == 0);
+
+       value = 0;
+       res = SDL_GLES_GetAttribute(SDL_GLES_DEPTH_SIZE, &value);
+       assert(res == 0);
+       printf("Depth buffer size is %d\n", value);
+
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+
+       glEnable(GL_DEPTH_TEST);
+       glClearColor(0.0f, 0.2f, 0.0f, 0.0f);
+       glEnableClientState(GL_VERTEX_ARRAY);
+       glEnableClientState(GL_COLOR_ARRAY);
+       glVertexPointer(3, GL_FLOAT, 0, vertices);
+       glColorPointer(4, GL_FLOAT, 0, colors);
+
+       draw();
+
+       SDL_Event event;
+       while (SDL_WaitEvent(&event)) {
+               switch (event.type) {
+                       case SDL_QUIT:
+                               goto quit;
+                       case SDL_MOUSEBUTTONDOWN:
+                               toggle_fullscreen();
+                               break;
+               }
+       }
+
+quit:
+       SDL_GLES_DeleteContext(context);
+
+       SDL_GLES_Quit();
+       SDL_Quit();
+
+       return 0;
+}
+