static gboolean
clutter_shader_glsl_bind (ClutterShader *self,
ClutterShaderType shader_type,
GError **error)
{
ClutterShaderPrivate *priv = self->priv;
CoglHandle shader = COGL_INVALID_HANDLE;
switch (shader_type)
{
case CLUTTER_VERTEX_SHADER:
shader = cogl_create_shader (COGL_SHADER_TYPE_VERTEX);
cogl_shader_source (shader, priv->vertex_source);
priv->vertex_shader = shader;
break;
case CLUTTER_FRAGMENT_SHADER:
shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
cogl_shader_source (shader, priv->fragment_source);
priv->fragment_shader = shader;
break;
}
g_assert (shader != COGL_INVALID_HANDLE);
cogl_shader_compile (shader);
if (!cogl_shader_is_compiled (shader))
{
gchar *log_buf;
log_buf = cogl_shader_get_info_log (shader);
/* translators: the first %s is the type of the shader, either
* Vertex shader or Fragment shader; the second %s is the actual
* error as reported by COGL
*/
g_set_error (error, CLUTTER_SHADER_ERROR,
CLUTTER_SHADER_ERROR_COMPILE,
_("%s compilation failed: %s"),
shader_type == CLUTTER_VERTEX_SHADER ? _("Vertex shader")
: _("Fragment shader"),
log_buf);
g_free (log_buf);
return FALSE;
}
cogl_program_attach_shader (priv->program, shader);
return TRUE;
}
static void
st_scroll_view_fade_init (StScrollViewFade *self)
{
static CoglHandle shader = COGL_INVALID_HANDLE;
if (shader == COGL_INVALID_HANDLE)
{
if (clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
{
shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
cogl_shader_source (shader, fade_glsl_shader);
cogl_shader_compile (shader);
if (!cogl_shader_is_compiled (shader))
{
gchar *log_buf = cogl_shader_get_info_log (shader);
g_warning (G_STRLOC ": Unable to compile the fade shader: %s",
log_buf);
g_free (log_buf);
cogl_handle_unref (shader);
shader = COGL_INVALID_HANDLE;
}
}
}
self->shader = shader;
self->is_attached = FALSE;
self->tex_uniform = -1;
self->height_uniform = -1;
self->width_uniform = -1;
self->scrollbar_width_uniform = -1;
self->scrollbar_height_uniform = -1;
self->rtl_uniform = -1;
self->offset_top_uniform = -1;
self->offset_bottom_uniform = -1;
self->fade_offset = DEFAULT_FADE_OFFSET;
if (shader != COGL_INVALID_HANDLE)
cogl_handle_ref (self->shader);
}
static void
clutter_shader_effect_paint_target (ClutterOffscreenEffect *effect)
{
ClutterShaderEffectPrivate *priv = CLUTTER_SHADER_EFFECT (effect)->priv;
ClutterOffscreenEffectClass *parent;
CoglHandle material;
/* we haven't been prepared or we don't have support for
* GLSL shaders in Clutter
*/
if (priv->program == COGL_INVALID_HANDLE ||
priv->shader == COGL_INVALID_HANDLE)
goto out;
if (!priv->source_set)
goto out;
if (!priv->is_compiled)
{
CLUTTER_NOTE (SHADER, "Compiling shader effect");
cogl_shader_compile (priv->shader);
if (!cogl_shader_is_compiled (priv->shader))
{
gchar *log_buf = cogl_shader_get_info_log (priv->shader);
g_warning ("Unable to compile the GLSL shader: %s", log_buf);
g_free (log_buf);
cogl_handle_unref (priv->shader);
priv->shader = COGL_INVALID_HANDLE;
cogl_handle_unref (priv->program);
priv->shader = COGL_INVALID_HANDLE;
goto out;
}
cogl_program_attach_shader (priv->program, priv->shader);
cogl_handle_unref (priv->shader);
cogl_program_link (priv->program);
priv->is_compiled = TRUE;
}
CLUTTER_NOTE (SHADER, "Applying the shader effect of type '%s'",
G_OBJECT_TYPE_NAME (effect));
clutter_shader_effect_update_uniforms (CLUTTER_SHADER_EFFECT (effect));
/* associate the program to the offscreen target material */
material = clutter_offscreen_effect_get_target (effect);
cogl_material_set_user_program (material, priv->program);
out:
/* paint the offscreen buffer */
parent = CLUTTER_OFFSCREEN_EFFECT_CLASS (clutter_shader_effect_parent_class);
parent->paint_target (effect);
}
static gboolean
clutter_colorize_effect_pre_paint (ClutterEffect *effect)
{
ClutterColorizeEffect *self = CLUTTER_COLORIZE_EFFECT (effect);
ClutterEffectClass *parent_class;
if (!clutter_actor_meta_get_enabled (CLUTTER_ACTOR_META (effect)))
return FALSE;
self->actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
if (self->actor == NULL)
return FALSE;
if (!clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
{
/* if we don't have support for GLSL shaders then we
* forcibly disable the ActorMeta
*/
g_warning ("Unable to use the ShaderEffect: the graphics hardware "
"or the current GL driver does not implement support "
"for the GLSL shading language.");
clutter_actor_meta_set_enabled (CLUTTER_ACTOR_META (effect), FALSE);
return FALSE;
}
if (self->shader == COGL_INVALID_HANDLE)
{
self->shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
cogl_shader_source (self->shader, colorize_glsl_shader);
self->is_compiled = FALSE;
self->tex_uniform = -1;
self->tint_uniform = -1;
}
if (self->program == COGL_INVALID_HANDLE)
self->program = cogl_create_program ();
if (!self->is_compiled)
{
g_assert (self->shader != COGL_INVALID_HANDLE);
g_assert (self->program != COGL_INVALID_HANDLE);
cogl_shader_compile (self->shader);
if (!cogl_shader_is_compiled (self->shader))
{
gchar *log_buf = cogl_shader_get_info_log (self->shader);
g_warning (G_STRLOC ": Unable to compile the colorize shader: %s",
log_buf);
g_free (log_buf);
cogl_handle_unref (self->shader);
cogl_handle_unref (self->program);
self->shader = COGL_INVALID_HANDLE;
self->program = COGL_INVALID_HANDLE;
}
else
{
cogl_program_attach_shader (self->program, self->shader);
cogl_program_link (self->program);
cogl_handle_unref (self->shader);
self->is_compiled = TRUE;
self->tex_uniform =
cogl_program_get_uniform_location (self->program, "tex");
self->tint_uniform =
cogl_program_get_uniform_location (self->program, "tint");
}
}
parent_class = CLUTTER_EFFECT_CLASS (clutter_colorize_effect_parent_class);
return parent_class->pre_paint (effect);
}
static void
paint (TestState *state)
{
CoglPipeline *pipeline = cogl_pipeline_new (test_ctx);
CoglTexture *tex;
CoglColor color;
CoglError *error = NULL;
CoglHandle shader, program;
cogl_color_init_from_4ub (&color, 0, 0, 0, 255);
cogl_clear (&color, COGL_BUFFER_BIT_COLOR);
/* Set the primary vertex color as red */
cogl_color_set_from_4ub (&color, 0xff, 0x00, 0x00, 0xff);
cogl_pipeline_set_color (pipeline, &color);
/* Override the vertex color in the texture environment with a
constant green color provided by a texture */
tex = create_dummy_texture ();
cogl_pipeline_set_layer_texture (pipeline, 0, tex);
cogl_object_unref (tex);
if (!cogl_pipeline_set_layer_combine (pipeline, 0,
"RGBA=REPLACE(TEXTURE)",
&error))
{
g_warning ("Error setting layer combine: %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"
" cogl_tex_coord_out[0] = cogl_tex_coord_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 without the program */
cogl_set_source (pipeline);
cogl_rectangle (0, 0, 50, 50);
/* Draw it again using the program. It should look exactly the same */
cogl_pipeline_set_user_program (pipeline, program);
cogl_handle_unref (program);
cogl_rectangle (50, 0, 100, 50);
cogl_pipeline_set_user_program (pipeline, COGL_INVALID_HANDLE);
cogl_object_unref (pipeline);
}
static gboolean
cd_icc_effect_pre_paint (ClutterEffect *effect)
{
CdIccEffect *self = CD_ICC_EFFECT (effect);
ClutterEffectClass *parent_class;
ClutterActorBox allocation;
gfloat width, height;
if (!clutter_actor_meta_get_enabled (CLUTTER_ACTOR_META (effect)))
return FALSE;
self->actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
if (self->actor == NULL)
return FALSE;
if (!clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
{
/* if we don't have support for GLSL shaders then we
* forcibly disable the ActorMeta
*/
g_warning ("Unable to use the ShaderEffect: the graphics hardware "
"or the current GL driver does not implement support "
"for the GLSL shading language.");
clutter_actor_meta_set_enabled (CLUTTER_ACTOR_META (effect), FALSE);
return FALSE;
}
clutter_actor_get_allocation_box (self->actor, &allocation);
clutter_actor_box_get_size (&allocation, &width, &height);
if (self->shader == COGL_INVALID_HANDLE)
{
self->shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
cogl_shader_source (self->shader, glsl_shader);
self->is_compiled = FALSE;
self->main_texture_uniform = -1;
self->indirect_texture_uniform = -1;
self->color_data1_uniform = -1;
self->color_data2_uniform = -1;
}
if (self->program == COGL_INVALID_HANDLE)
self->program = cogl_create_program ();
if (!self->is_compiled)
{
g_assert (self->shader != COGL_INVALID_HANDLE);
g_assert (self->program != COGL_INVALID_HANDLE);
cogl_shader_compile (self->shader);
if (!cogl_shader_is_compiled (self->shader))
{
gchar *log_buf = cogl_shader_get_info_log (self->shader);
g_warning (G_STRLOC ": Unable to compile the icc shader: %s",
log_buf);
g_free (log_buf);
cogl_handle_unref (self->shader);
cogl_handle_unref (self->program);
self->shader = COGL_INVALID_HANDLE;
self->program = COGL_INVALID_HANDLE;
}
else
{
cogl_program_attach_shader (self->program, self->shader);
cogl_program_link (self->program);
cogl_handle_unref (self->shader);
self->is_compiled = TRUE;
self->main_texture_uniform =
cogl_program_get_uniform_location (self->program, "main_texture");
self->indirect_texture_uniform =
cogl_program_get_uniform_location (self->program, "indirect_texture");
self->color_data1_uniform =
cogl_program_get_uniform_location (self->program, "color_data1");
self->color_data2_uniform =
cogl_program_get_uniform_location (self->program, "color_data2");
}
}
parent_class = CLUTTER_EFFECT_CLASS (cd_icc_effect_parent_class);
return parent_class->pre_paint (effect);
}