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#include <clutter/clutter.h>
#include <cogl/cogl.h>
#include "test-conform-common.h"
/* This test verifies that interleved attributes work with the vertex buffer
* API. We add (x,y) GLfloat vertices, interleved with RGBA GLubyte color
* attributes to a buffer, 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 buffer;
ClutterGeometry stage_geom;
} 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 = 90;
/* 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 */
cogl_read_pixels (10, y_off, 1, 1,
COGL_READ_PIXELS_COLOR_BUFFER,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
pixel);
if (cogl_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_vertex_buffer_draw (state->buffer,
GL_TRIANGLE_STRIP, /* mode */
0, /* first */
3); /* count */
validate_result (state);
}
static CoglBool
queue_redraw (gpointer stage)
{
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
return TRUE;
}
void
test_vertex_buffer_interleved (TestUtilsGTestFixture *fixture,
void *data)
{
TestState state;
ClutterActor *stage;
ClutterColor stage_clr = {0x0, 0x0, 0x0, 0xff};
ClutterActor *group;
unsigned int idle_source;
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 incase someone comments out the
* clutter_main_quit and wants visual feedback for the test since 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.buffer = cogl_vertex_buffer_new (3 /* n vertices */);
cogl_vertex_buffer_add (state.buffer,
"gl_Vertex",
2, /* n components */
GL_FLOAT,
FALSE, /* normalized */
12, /* stride */
&verts[0].x);
cogl_vertex_buffer_add (state.buffer,
"gl_Color",
4, /* n components */
GL_UNSIGNED_BYTE,
FALSE, /* normalized */
12, /* stride */
&verts[0].r);
cogl_vertex_buffer_submit (state.buffer);
}
clutter_actor_show_all (stage);
clutter_main ();
cogl_handle_unref (state.buffer);
g_source_remove (idle_source);
if (cogl_test_verbose ())
g_print ("OK\n");
}
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