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#include <clutter/clutter.h>
#include <cogl/cogl.h>
#include <string.h>
#include "test-conform-common.h"
static const ClutterColor stage_color = { 0x0, 0x0, 0x0, 0xff };
#define QUAD_WIDTH 20
#define RED 0
#define GREEN 1
#define BLUE 2
#define ALPHA 3
typedef struct _TestState
{
unsigned int padding;
} TestState;
static void
assert_region_color (int x,
int y,
int width,
int height,
uint8_t red,
uint8_t green,
uint8_t blue,
uint8_t alpha)
{
uint8_t *data = g_malloc0 (width * height * 4);
cogl_read_pixels (x, y, width, height,
COGL_READ_PIXELS_COLOR_BUFFER,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
data);
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
uint8_t *pixel = &data[y * width * 4 + x * 4];
#if 1
g_assert (pixel[RED] == red &&
pixel[GREEN] == green &&
pixel[BLUE] == blue);
#endif
}
g_free (data);
}
/* Creates a texture divided into 4 quads with colors arranged as follows:
* (The same value are used in all channels for each texel)
*
* |-----------|
* |0x11 |0x00 |
* |+ref | |
* |-----------|
* |0x00 |0x33 |
* | |+ref |
* |-----------|
*
*
*/
static CoglHandle
make_texture (guchar ref)
{
int x;
int y;
guchar *tex_data, *p;
CoglHandle tex;
guchar val;
tex_data = g_malloc (QUAD_WIDTH * QUAD_WIDTH * 16);
for (y = 0; y < QUAD_WIDTH * 2; y++)
for (x = 0; x < QUAD_WIDTH * 2; x++)
{
p = tex_data + (QUAD_WIDTH * 8 * y) + x * 4;
if (x < QUAD_WIDTH && y < QUAD_WIDTH)
val = 0x11 + ref;
else if (x >= QUAD_WIDTH && y >= QUAD_WIDTH)
val = 0x33 + ref;
else
val = 0x00;
p[0] = p[1] = p[2] = p[3] = val;
}
/* Note: we don't use COGL_PIXEL_FORMAT_ANY for the internal format here
* since we don't want to allow Cogl to premultiply our data. */
tex = test_utils_texture_new_from_data (QUAD_WIDTH * 2,
QUAD_WIDTH * 2,
TEST_UTILS_TEXTURE_NONE,
COGL_PIXEL_FORMAT_RGBA_8888,
COGL_PIXEL_FORMAT_RGBA_8888,
QUAD_WIDTH * 8,
tex_data);
g_free (tex_data);
return tex;
}
static void
on_paint (ClutterActor *actor, TestState *state)
{
CoglHandle tex0, tex1;
CoglHandle material;
CoglBool status;
CoglError *error = NULL;
float tex_coords[] = {
0, 0, 0.5, 0.5, /* tex0 */
0.5, 0.5, 1, 1 /* tex1 */
};
tex0 = make_texture (0x00);
tex1 = make_texture (0x11);
material = cogl_material_new ();
/* An arbitrary color which should be replaced by the first texture layer */
cogl_material_set_color4ub (material, 0x80, 0x80, 0x80, 0x80);
cogl_material_set_blend (material, "RGBA = ADD (SRC_COLOR, 0)", NULL);
cogl_material_set_layer (material, 0, tex0);
cogl_material_set_layer_combine (material, 0,
"RGBA = REPLACE (TEXTURE)", NULL);
/* We'll use nearest filtering mode on the textures, otherwise the
edge of the quad can pull in texels from the neighbouring
quarters of the texture due to imprecision */
cogl_material_set_layer_filters (material, 0,
COGL_MATERIAL_FILTER_NEAREST,
COGL_MATERIAL_FILTER_NEAREST);
cogl_material_set_layer (material, 1, tex1);
cogl_material_set_layer_filters (material, 1,
COGL_MATERIAL_FILTER_NEAREST,
COGL_MATERIAL_FILTER_NEAREST);
status = cogl_material_set_layer_combine (material, 1,
"RGBA = ADD (PREVIOUS, TEXTURE)",
&error);
if (!status)
{
/* It's not strictly a test failure; you need a more capable GPU or
* driver to test this texture combine string. */
g_debug ("Failed to setup texture combine string "
"RGBA = ADD (PREVIOUS, TEXTURE): %s",
error->message);
}
cogl_set_source (material);
cogl_rectangle_with_multitexture_coords (0, 0, QUAD_WIDTH, QUAD_WIDTH,
tex_coords, 8);
cogl_handle_unref (material);
cogl_handle_unref (tex0);
cogl_handle_unref (tex1);
/* See what we got... */
assert_region_color (0, 0, QUAD_WIDTH, QUAD_WIDTH,
0x55, 0x55, 0x55, 0x55);
/* Comment this out if you want visual feedback for what this test paints */
#if 1
clutter_main_quit ();
#endif
}
static CoglBool
queue_redraw (void *stage)
{
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
return TRUE;
}
void
test_multitexture (TestUtilsGTestFixture *fixture,
void *data)
{
TestState state;
ClutterActor *stage;
ClutterActor *group;
unsigned int idle_source;
stage = clutter_stage_get_default ();
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
group = clutter_group_new ();
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);
clutter_actor_show_all (stage);
clutter_main ();
g_source_remove (idle_source);
if (cogl_test_verbose ())
g_print ("OK\n");
}
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