mirror of
https://github.com/brl/mutter.git
synced 2024-11-23 16:40:41 -05:00
9c32d07453
This creates a material which users a layer to override the color of the rectangle. A simple vertex shader is then created which just emulates the fixed function pipeline. No fragment shader is added. This demonstrates a bug where the layer state is getting ignored when a vertex shader is in use. http://bugzilla.clutter-project.org/show_bug.cgi?id=2221
136 lines
3.6 KiB
C
136 lines
3.6 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"
|
|
" gl_Position = ftransform ();\n"
|
|
" gl_FrontColor = gl_Color;\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 (TestConformSimpleFixture *fixture,
|
|
gconstpointer data)
|
|
{
|
|
ClutterActor *stage;
|
|
guint 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");
|
|
}
|
|
|