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

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#include <cogl/cogl.h>
#include <string.h>
#include "test-utils.h"
#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
{
int padding;
} TestState;
typedef struct
{
uint32_t color;
float depth;
CoglBool test_enable;
CoglDepthTestFunction test_function;
CoglBool write_enable;
float range_near;
float range_far;
} TestDepthState;
static CoglBool
draw_rectangle (TestState *state,
int x,
int y,
TestDepthState *rect_state,
CoglBool legacy_mode)
{
uint8_t Cr = MASK_RED (rect_state->color);
uint8_t Cg = MASK_GREEN (rect_state->color);
uint8_t Cb = MASK_BLUE (rect_state->color);
uint8_t Ca = MASK_ALPHA (rect_state->color);
CoglPipeline *pipeline;
CoglDepthState depth_state;
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);
pipeline = cogl_pipeline_new (ctx);
if (!cogl_pipeline_set_depth_state (pipeline, &depth_state, NULL))
{
cogl_object_unref (pipeline);
return FALSE;
}
if (!legacy_mode)
{
cogl_pipeline_set_color4ub (pipeline, Cr, Cg, Cb, Ca);
cogl_framebuffer_push_matrix (fb);
cogl_framebuffer_translate (fb, 0, 0, rect_state->depth);
cogl_framebuffer_draw_rectangle (fb,
pipeline,
x * QUAD_WIDTH,
y * QUAD_WIDTH,
x * QUAD_WIDTH + QUAD_WIDTH,
y * QUAD_WIDTH + QUAD_WIDTH);
cogl_framebuffer_pop_matrix (fb);
}
else
{
cogl_push_framebuffer (fb);
cogl_push_matrix ();
cogl_set_source_color4ub (Cr, Cg, Cb, Ca);
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_pop_framebuffer ();
}
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,
CoglBool legacy_mode,
uint32_t expected_result)
{
CoglBool missing_feature = FALSE;
if (rect0_state)
missing_feature |= !draw_rectangle (state, x, y, rect0_state, legacy_mode);
if (rect1_state)
missing_feature |= !draw_rectangle (state, x, y, rect1_state, legacy_mode);
if (rect2_state)
missing_feature |= !draw_rectangle (state, x, y, rect2_state, legacy_mode);
/* We don't consider it an error that we can't test something
* the driver doesn't support. */
if (missing_feature)
return;
test_utils_check_pixel (fb,
x * QUAD_WIDTH + (QUAD_WIDTH / 2),
y * QUAD_WIDTH + (QUAD_WIDTH / 2),
expected_result);
}
static void
paint (TestState *state)
{
/* 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,
FALSE, /* legacy mode */
0x00ff00ff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_ALWAYS;
test_depth (state, 1, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
FALSE, /* legacy mode */
0x0000ffff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_LESS;
test_depth (state, 2, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
FALSE, /* legacy mode */
0x0000ffff); /* expected */
rect2_state.test_function = COGL_DEPTH_TEST_FUNCTION_GREATER;
test_depth (state, 3, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
FALSE, /* legacy mode */
0x00ff00ff); /* expected */
rect0_state.test_enable = TRUE;
rect1_state.write_enable = FALSE;
test_depth (state, 4, 0, /* position */
&rect0_state, &rect1_state, &rect2_state,
FALSE, /* legacy mode */
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,
FALSE, /* legacy mode */
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,
TRUE, /* legacy mode */
0xff0000ff); /* expected */
cogl_set_depth_test_enabled (FALSE);
test_depth (state, 1, 2, /* position */
&rect0_state, &rect1_state, NULL,
TRUE, /* legacy mode */
0x00ff00ff); /* expected */
}
}
void
test_depth_test (void)
{
TestState state;
cogl_framebuffer_orthographic (fb, 0, 0,
cogl_framebuffer_get_width (fb),
cogl_framebuffer_get_height (fb),
-1,
100);
paint (&state);
if (cogl_test_verbose ())
g_print ("OK\n");
}