diff options
Diffstat (limited to 'tests/conform/test-just-vertex-shader.c')
| -rw-r--r-- | tests/conform/test-just-vertex-shader.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/tests/conform/test-just-vertex-shader.c b/tests/conform/test-just-vertex-shader.c new file mode 100644 index 00000000..886f354e --- /dev/null +++ b/tests/conform/test-just-vertex-shader.c @@ -0,0 +1,137 @@ +#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"); +} + |