mutter/tests/conform/test-cogl-depth-test.c

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#include <clutter/clutter.h>
#ifndef COGL_ENABLE_EXPERIMENTAL_API
#define COGL_ENABLE_EXPERIMENTAL_API
#endif
#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
#define MASK_RED(COLOR) ((COLOR & 0xff000000) >> 24)
#define MASK_GREEN(COLOR) ((COLOR & 0xff0000) >> 16)
#define MASK_BLUE(COLOR) ((COLOR & 0xff00) >> 8)
#define MASK_ALPHA(COLOR) (COLOR & 0xff)
typedef struct _TestState
{
ClutterGeometry stage_geom;
} TestState;
typedef struct
{
guint32 color;
float depth;
gboolean test_enable;
CoglDepthTestFunction test_function;
gboolean write_enable;
float range_near;
float range_far;
} TestDepthState;
static void
check_pixel (GLubyte *pixel, guint32 color)
{
guint8 r = MASK_RED (color);
guint8 g = MASK_GREEN (color);
guint8 b = MASK_BLUE (color);
guint8 a = MASK_ALPHA (color);
if (g_test_verbose ())
g_print (" expected = %x, %x, %x, %x\n",
r, g, b, a);
/* FIXME - allow for hardware in-precision */
g_assert_cmpint (pixel[RED], ==, r);
g_assert_cmpint (pixel[GREEN], ==, g);
g_assert_cmpint (pixel[BLUE], ==, b);
/* FIXME
* We ignore the alpha, since we don't know if our render target is
* RGB or RGBA */
/* g_assert (pixel[ALPHA] == a); */
}
static gboolean
draw_rectangle (TestState *state,
int x,
int y,
TestDepthState *rect_state)
{
CoglDepthState depth_state;
guint8 Cr = MASK_RED (rect_state->color);
guint8 Cg = MASK_GREEN (rect_state->color);
guint8 Cb = MASK_BLUE (rect_state->color);
guint8 Ca = MASK_ALPHA (rect_state->color);
CoglPipeline *pipeline;
pipeline = cogl_pipeline_new ();
cogl_depth_state_init (&depth_state);
cogl_depth_state_set_test_enabled (&depth_state, rect_state->test_enable);
cogl_depth_state_set_test_function (&depth_state, rect_state->test_function);
cogl_depth_state_set_write_enabled (&depth_state, rect_state->write_enable);
cogl_depth_state_set_range (&depth_state,
rect_state->range_near,
rect_state->range_far);
if (!cogl_pipeline_set_depth_state (pipeline, &depth_state, NULL))
{
cogl_object_unref (pipeline);
return FALSE;
}
cogl_pipeline_set_color4ub (pipeline, Cr, Cg, Cb, Ca);
cogl_set_source (pipeline);
cogl_push_matrix ();
cogl_translate (0, 0, rect_state->depth);
cogl_rectangle (x * QUAD_WIDTH,
y * QUAD_WIDTH,
x * QUAD_WIDTH + QUAD_WIDTH,
y * QUAD_WIDTH + QUAD_WIDTH);
cogl_pop_matrix ();
cogl_object_unref (pipeline);
return TRUE;
}
static void
test_depth (TestState *state,
int x,
int y,
TestDepthState *rect0_state,
TestDepthState *rect1_state,
TestDepthState *rect2_state,
guint32 expected_result)
{
GLubyte pixel[4];
GLint y_off;
GLint x_off;
gboolean missing_feature = FALSE;
if (rect0_state)
missing_feature |= !draw_rectangle (state, x, y, rect0_state);
if (rect1_state)
missing_feature |= !draw_rectangle (state, x, y, rect1_state);
if (rect2_state)
missing_feature |= !draw_rectangle (state, x, y, rect2_state);
/* We don't consider it an error that we can't test something
* the driver doesn't support. */
if (missing_feature)
return;
/* See what we got... */
y_off = y * QUAD_WIDTH + (QUAD_WIDTH / 2);
x_off = x * QUAD_WIDTH + (QUAD_WIDTH / 2);
cogl_read_pixels (x_off, y_off, 1, 1,
COGL_READ_PIXELS_COLOR_BUFFER,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
pixel);
check_pixel (pixel, expected_result);
}
static void
on_paint (ClutterActor *actor, TestState *state)
{
CoglMatrix projection_save;
CoglMatrix identity;
/* We don't want the effects of perspective division to interfere
* with the positions of our test rectangles on the x and y axis
* so we use an orthographic projection...
*/
cogl_get_projection_matrix (&projection_save);
cogl_ortho (0, state->stage_geom.width, /* left, right */
state->stage_geom.height, 0, /* bottom, top */
-1, 100 /* z near, far */);
cogl_push_matrix ();
cogl_matrix_init_identity (&identity);
cogl_set_modelview_matrix (&identity);
/* Sanity check a few of the different depth test functions
* and that depth writing can be disabled... */
{
/* Closest */
TestDepthState rect0_state = {
0xff0000ff, /* rgba color */
-10, /* depth */
FALSE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_ALWAYS,
TRUE, /* depth write enable */
0, 1 /* depth range */
};
/* Furthest */
TestDepthState rect1_state = {
0x00ff00ff, /* rgba color */
-70, /* depth */
TRUE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_ALWAYS,
TRUE, /* depth write enable */
0, 1 /* depth range */
};
/* In the middle */
TestDepthState rect2_state = {
0x0000ffff, /* rgba color */
-20, /* depth */
TRUE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_NEVER,
TRUE, /* depth write enable */
0, 1 /* depth range */
};
test_depth (state, 0, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
0x00ff00ff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_ALWAYS;
test_depth (state, 1, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
0x0000ffff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_LESS;
test_depth (state, 2, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
0x0000ffff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_GREATER;
test_depth (state, 3, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
0x00ff00ff); /* expected */
rect0_state.test_enable = TRUE;
rect1_state.write_enable = FALSE;
test_depth (state, 4, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
0x0000ffff); /* expected */
}
/* Check that the depth buffer values can be mapped into different
* ranges... */
{
/* Closest by depth, furthest by depth range */
TestDepthState rect0_state = {
0xff0000ff, /* rgba color */
-10, /* depth */
TRUE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_ALWAYS,
TRUE, /* depth write enable */
0.5, 1 /* depth range */
};
/* Furthest by depth, nearest by depth range */
TestDepthState rect1_state = {
0x00ff00ff, /* rgba color */
-70, /* depth */
TRUE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_GREATER,
TRUE, /* depth write enable */
0, 0.5 /* depth range */
};
test_depth (state, 0, 1, /* position */
&rect0_state, &rect1_state, NULL,
0xff0000ff); /* expected */
}
/* Test that the legacy cogl_set_depth_test_enabled() API still
* works... */
{
/* Nearest */
TestDepthState rect0_state = {
0xff0000ff, /* rgba color */
-10, /* depth */
FALSE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_LESS,
TRUE, /* depth write enable */
0, 1 /* depth range */
};
/* Furthest */
TestDepthState rect1_state = {
0x00ff00ff, /* rgba color */
-70, /* depth */
FALSE, /* depth test enable */
COGL_DEPTH_TEST_FUNCTION_LESS,
TRUE, /* depth write enable */
0, 1 /* depth range */
};
cogl_set_depth_test_enabled (TRUE);
test_depth (state, 0, 2, /* position */
&rect0_state, &rect1_state, NULL,
0xff0000ff); /* expected */
cogl_set_depth_test_enabled (FALSE);
test_depth (state, 1, 2, /* position */
&rect0_state, &rect1_state, NULL,
0x00ff00ff); /* expected */
}
cogl_pop_matrix ();
cogl_set_projection_matrix (&projection_save);
clutter_main_quit ();
}
static gboolean
queue_redraw (gpointer stage)
{
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
return TRUE;
}
void
test_cogl_depth_test (TestConformSimpleFixture *fixture,
gconstpointer data)
{
TestState state;
ClutterActor *stage;
ClutterActor *group;
guint idle_source;
stage = clutter_stage_new ();
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
clutter_actor_get_geometry (stage, &state.stage_geom);
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);
clutter_actor_destroy (stage);
if (g_test_verbose ())
g_print ("OK\n");
}