[cogl] test-gles2-context: Read pixels using GL_RGBA not GL_RGB

[Neil Roberts <nroberts src gnome org>]

commit 745cbcbdee0f5b4df4c6a735b03709248a551884
Author: Neil Roberts <neil linux intel com>
Date:   Wed Feb 6 12:59:58 2013 +0000

    test-gles2-context: Read pixels using GL_RGBA not GL_RGB
    
    The GLES2 spec only guarantees calling glReadPixels with GL_RGBA and
    an implementation specific format. Mesa seems to now reject reading
    with GL_RGB so the test had started failing. This fixes it to just
    read using GL_RGBA.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 tests/conform/test-gles2-context.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/tests/conform/test-gles2-context.c b/tests/conform/test-gles2-context.c
index e9f6e3a..7b5f0fc 100644
--- a/tests/conform/test-gles2-context.c
+++ b/tests/conform/test-gles2-context.c
@@ -277,7 +277,7 @@ test_gles2_read_pixels (void)
   CoglGLES2Context *gles2_ctx;
   const CoglGLES2Vtable *gles2;
   CoglError *error = NULL;
-  GLubyte pixel[3];
+  GLubyte pixel[4];
   GLuint fbo_handle;
 
   create_gles2_context (&offscreen_texture,
@@ -299,7 +299,7 @@ test_gles2_read_pixels (void)
 
   gles2->glClearColor (1, 0, 0, 1);
   gles2->glClear (GL_COLOR_BUFFER_BIT);
-  gles2->glReadPixels (0, 0, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &pixel);
+  gles2->glReadPixels (0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
 
   test_utils_compare_pixel (pixel, 0xff0000ff);
 
@@ -309,7 +309,7 @@ test_gles2_read_pixels (void)
 
   gles2->glClearColor (0, 1, 0, 1);
   gles2->glClear (GL_COLOR_BUFFER_BIT);
-  gles2->glReadPixels (0, 0, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &pixel);
+  gles2->glReadPixels (0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
 
   test_utils_compare_pixel (pixel, 0x00ff00ff);
 
@@ -317,7 +317,7 @@ test_gles2_read_pixels (void)
 
   gles2->glClearColor (0, 1, 1, 1);
   gles2->glClear (GL_COLOR_BUFFER_BIT);
-  gles2->glReadPixels (0, 0, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &pixel);
+  gles2->glReadPixels (0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
 
   test_utils_compare_pixel (pixel, 0x00ffffff);
 
@@ -335,7 +335,7 @@ test_gles2_read_pixels (void)
       g_error ("Failed to push gles2 context: %s\n", error->message);
     }
 
-  gles2->glReadPixels (0, 0, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &pixel);
+  gles2->glReadPixels (0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
 
   test_utils_compare_pixel (pixel, 0x00ffffff);
 
@@ -355,7 +355,7 @@ test_gles2_read_pixels (void)
       g_error ("Failed to push gles2 context: %s\n", error->message);
     }
 
-  gles2->glReadPixels (0, 0, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &pixel);
+  gles2->glReadPixels (0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel);
 
   test_utils_compare_pixel (pixel, 0xffffffff);