mutter/tests/conform/test-just-vertex-shader.c
Robert Bragg b5a7657076 Starts porting Cogl conformance tests from Clutter
This makes a start on porting the Cogl conformance tests that currently
still live in the Clutter repository to be standalone Cogl tests that no
longer require a ClutterStage.

The main thing is that this commit brings in is the basic testing
infrastructure we need, so now we can port more and more tests
incrementally.

Since the test suite wants a way to synchronize X requests/replies and
we can't simply call XSynchronize in the test-utils code before we know
if we are really running on X this adds a check for an environment
variable named "COGL_X11_SYNC" in cogl-xlib-renderer.c and if it's set
it forces XSynchronize (dpy, TRUE) to be called.

By default the conformance tests are run off screen. This makes the
tests run much faster and they also don't interfere with other work you
may want to do by constantly stealing focus. CoglOnscreen framebuffers
obviously don't get tested this way so it's important that the tests
also get run on screen every once in a while, especially if changes are
being made to CoglFramebuffer related code.  On screen testing can be
enabled by setting COGL_TEST_ONSCREEN=1 in your environment.
2011-09-08 15:48:07 +01:00

138 lines
3.7 KiB
C

#include <clutter/clutter.h>
#include <string.h>
#include "test-conform-common.h"
static const ClutterColor stage_color = { 0x00, 0x00, 0xff, 0xff };
static void
draw_frame (void)
{
CoglHandle material = cogl_material_new ();
CoglColor color;
GError *error = NULL;
CoglHandle shader, program;
/* Set the primary vertex color as red */
cogl_color_set_from_4ub (&color, 0xff, 0x00, 0x00, 0xff);
cogl_material_set_color (material, &color);
/* Override the vertex color in the texture environment with a
constant green color */
cogl_color_set_from_4ub (&color, 0x00, 0xff, 0x00, 0xff);
cogl_material_set_layer_combine_constant (material, 0, &color);
if (!cogl_material_set_layer_combine (material, 0,
"RGBA=REPLACE(CONSTANT)",
&error))
{
g_warning ("Error setting blend constant: %s", error->message);
g_assert_not_reached ();
}
/* Set up a dummy vertex shader that does nothing but the usual
fixed function transform */
shader = cogl_create_shader (COGL_SHADER_TYPE_VERTEX);
cogl_shader_source (shader,
"void\n"
"main ()\n"
"{\n"
" cogl_position_out = "
"cogl_modelview_projection_matrix * "
"cogl_position_in;\n"
" cogl_color_out = cogl_color_in;\n"
"}\n");
cogl_shader_compile (shader);
if (!cogl_shader_is_compiled (shader))
{
char *log = cogl_shader_get_info_log (shader);
g_warning ("Shader compilation failed:\n%s", log);
g_free (log);
g_assert_not_reached ();
}
program = cogl_create_program ();
cogl_program_attach_shader (program, shader);
cogl_program_link (program);
cogl_handle_unref (shader);
/* Draw something using the material */
cogl_set_source (material);
cogl_rectangle (0, 0, 50, 50);
/* Draw it again using the program. It should look exactly the same */
cogl_program_use (program);
cogl_rectangle (50, 0, 100, 50);
cogl_program_use (COGL_INVALID_HANDLE);
cogl_handle_unref (material);
cogl_handle_unref (program);
}
static void
validate_pixel (int x, int y)
{
guint8 pixels[4];
cogl_read_pixels (x, y, 1, 1, COGL_READ_PIXELS_COLOR_BUFFER,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, pixels);
/* The final color should be green. If it's blue then the layer
state is being ignored. If it's green then the stage is showing
through */
g_assert_cmpint (pixels[0], ==, 0x00);
g_assert_cmpint (pixels[1], ==, 0xff);
g_assert_cmpint (pixels[2], ==, 0x00);
}
static void
validate_result (void)
{
/* Non-shader version */
validate_pixel (25, 25);
/* Shader version */
validate_pixel (75, 25);
}
static void
on_paint (void)
{
draw_frame ();
validate_result ();
/* Comment this out to see what the test paints */
clutter_main_quit ();
}
void
test_cogl_just_vertex_shader (TestUtilsGTestFixture *fixture,
void *data)
{
ClutterActor *stage;
unsigned int paint_handler;
stage = clutter_stage_get_default ();
/* If shaders aren't supported then we can't run the test */
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
{
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
paint_handler = g_signal_connect_after (stage, "paint",
G_CALLBACK (on_paint), NULL);
clutter_actor_show (stage);
clutter_main ();
g_signal_handler_disconnect (stage, paint_handler);
if (g_test_verbose ())
g_print ("OK\n");
}
else if (g_test_verbose ())
g_print ("Skipping\n");
}