mutter/tests/conform/test-mesh-interleved.c
Neil Roberts 1cbafc99d6 * tests/conform/test-mesh-mutability.c:
* tests/conform/test-mesh-interleved.c:
	* tests/conform/test-mesh-contiguous.c: Remove the idle source
	after the test is complete so that it won't interfere with other
	tests.
2008-11-28 16:25:20 +00:00

174 lines
4.1 KiB
C

#include <clutter/clutter.h>
#include <cogl/cogl.h>
#include "test-conform-common.h"
/* This test verifies that interleved attributes work with the mesh API.
* We add (x,y) GLfloat vertices, interleved with RGBA GLubyte color
* attributes to a mesh object, submit and draw.
*
* If you want visual feedback of what this test paints for debugging purposes,
* then remove the call to clutter_main_quit() in validate_result.
*/
typedef struct _TestState
{
CoglHandle mesh;
ClutterGeometry stage_geom;
guint frame;
} TestState;
typedef struct _InterlevedVertex
{
GLfloat x;
GLfloat y;
GLubyte r;
GLubyte g;
GLubyte b;
GLubyte a;
} InterlevedVertex;
static void
validate_result (TestState *state)
{
GLubyte pixel[4];
GLint y_off = state->stage_geom.height - 90;
/* NB: glReadPixels is done in GL screen space so y = 0 is at the bottom */
/* NB: We ignore the alpha, since we don't know if our render target is
* RGB or RGBA */
#define RED 0
#define GREEN 1
#define BLUE 2
/* Should see a blue pixel */
glReadPixels (10, y_off, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixel);
if (g_test_verbose ())
g_print ("pixel 0 = %x, %x, %x\n", pixel[RED], pixel[GREEN], pixel[BLUE]);
g_assert (pixel[RED] == 0 && pixel[GREEN] == 0 && pixel[BLUE] != 0);
#undef RED
#undef GREEN
#undef BLUE
/* Comment this out if you want visual feedback of what this test
* paints.
*/
clutter_main_quit ();
}
static void
on_paint (ClutterActor *actor, TestState *state)
{
/* Draw a faded blue triangle */
cogl_mesh_draw_arrays (state->mesh,
GL_TRIANGLE_STRIP, /* mode */
0, /* first */
3); /* count */
/* XXX: Experiments have shown that for some buggy drivers, when using
* glReadPixels there is some kind of race, so we delay our test for a
* few frames and a few seconds:
*/
if (state->frame >= 2)
validate_result (state);
else
g_usleep (G_USEC_PER_SEC);
state->frame++;
}
static gboolean
queue_redraw (gpointer stage)
{
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
return TRUE;
}
void
test_mesh_interleved (TestConformSimpleFixture *fixture,
gconstpointer data)
{
TestState state;
ClutterActor *stage;
ClutterColor stage_clr = {0x0, 0x0, 0x0, 0xff};
ClutterActor *group;
guint idle_source;
state.frame = 0;
stage = clutter_stage_get_default ();
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_clr);
clutter_actor_get_geometry (stage, &state.stage_geom);
group = clutter_group_new ();
clutter_actor_set_size (group,
state.stage_geom.width,
state.stage_geom.height);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
/* We force continuous redrawing of the stage, since we need to skip
* the first few frames, and we wont be doing anything else that
* will trigger redrawing. */
idle_source = g_idle_add (queue_redraw, stage);
g_signal_connect (group, "paint", G_CALLBACK (on_paint), &state);
{
InterlevedVertex verts[3] =
{
{ /* .x = */ 0.0, /* .y = */ 0.0,
/* blue */
/* .r = */ 0x00, /* .g = */ 0x00, /* .b = */ 0xff, /* .a = */ 0xff },
{ /* .x = */ 100.0, /* .y = */ 100.0,
/* transparent blue */
/* .r = */ 0x00, /* .g = */ 0x00, /* .b = */ 0xff, /* .a = */ 0x00 },
{ /* .x = */ 0.0, /* .y = */ 100.0,
/* transparent blue */
/* .r = */ 0x00, /* .g = */ 0x00, /* .b = */ 0xff, /* .a = */ 0x00 },
};
/* We assume the compiler is doing no funny struct padding for this test:
*/
g_assert (sizeof (InterlevedVertex) == 12);
state.mesh = cogl_mesh_new (3 /* n vertices */);
cogl_mesh_add_attribute (state.mesh,
"gl_Vertex",
2, /* n components */
GL_FLOAT,
FALSE, /* normalized */
12, /* stride */
&verts[0].x);
cogl_mesh_add_attribute (state.mesh,
"gl_Color",
4, /* n components */
GL_UNSIGNED_BYTE,
FALSE, /* normalized */
12, /* stride */
&verts[0].r);
cogl_mesh_submit (state.mesh);
}
clutter_actor_show_all (stage);
clutter_main ();
cogl_mesh_unref (state.mesh);
g_source_remove (idle_source);
if (g_test_verbose ())
g_print ("OK\n");
}