void
cogl_program_uniform_matrix (int uniform_no,
int size,
int count,
gboolean transpose,
const float *value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl_program_set_uniform_matrix (ctx->current_program,
uniform_no, size, count, transpose, value);
}
static void
st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect)
{
StScrollViewFade *self = ST_SCROLL_VIEW_FADE (effect);
ClutterOffscreenEffectClass *parent;
CoglHandle material;
gdouble value, lower, upper, page_size;
ClutterActor *vscroll = st_scroll_view_get_vscroll_bar (ST_SCROLL_VIEW (self->actor));
ClutterActor *hscroll = st_scroll_view_get_hscroll_bar (ST_SCROLL_VIEW (self->actor));
gboolean h_scroll_visible, v_scroll_visible;
ClutterActorBox allocation, content_box, paint_box;
/*
* Used to pass the fade area to the shader
*
* [0][0] = x1
* [0][1] = y1
* [1][0] = x2
* [1][1] = y2
*
*/
float fade_area[2][2];
ClutterVertex verts[4];
if (self->program == COGL_INVALID_HANDLE)
goto out;
clutter_actor_get_paint_box (self->actor, &paint_box);
clutter_actor_get_abs_allocation_vertices (self->actor, verts);
clutter_actor_get_allocation_box (self->actor, &allocation);
st_theme_node_get_content_box (st_widget_get_theme_node (ST_WIDGET (self->actor)),
(const ClutterActorBox *)&allocation, &content_box);
/*
* The FBO is based on the paint_volume's size which can be larger then the actual
* allocation, so we have to account for that when passing the positions
*/
fade_area[0][0] = content_box.x1 + (verts[0].x - paint_box.x1);
fade_area[0][1] = content_box.y1 + (verts[0].y - paint_box.y1);
fade_area[1][0] = content_box.x2 + (verts[3].x - paint_box.x2);
fade_area[1][1] = content_box.y2 + (verts[3].y - paint_box.y2);
g_object_get (ST_SCROLL_VIEW (self->actor),
"hscrollbar-visible", &h_scroll_visible,
"vscrollbar-visible", &v_scroll_visible,
NULL);
if (v_scroll_visible)
{
if (st_widget_get_direction (ST_WIDGET (self->actor)) == ST_TEXT_DIRECTION_RTL)
fade_area[0][0] += clutter_actor_get_width (vscroll);
fade_area[1][0] -= clutter_actor_get_width (vscroll);
}
if (h_scroll_visible)
fade_area[1][1] -= clutter_actor_get_height (hscroll);
st_adjustment_get_values (self->vadjustment, &value, &lower, &upper, NULL, NULL, &page_size);
if (self->offset_top_uniform > -1) {
if (value > lower + 0.1)
cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, self->fade_offset);
else
cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, 0.0f);
}
if (self->offset_bottom_uniform > -1) {
if (value < upper - page_size - 0.1)
cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, self->fade_offset);
else
cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, 0.0f);
}
if (self->tex_uniform > -1)
cogl_program_set_uniform_1i (self->program, self->tex_uniform, 0);
if (self->height_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->height_uniform, clutter_actor_get_height (self->actor));
if (self->width_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->width_uniform, clutter_actor_get_width (self->actor));
if (self->fade_area_uniform > -1)
cogl_program_set_uniform_matrix (self->program, self->fade_area_uniform, 2, 1, FALSE, (const float *)fade_area);
material = clutter_offscreen_effect_get_target (effect);
cogl_material_set_user_program (material, self->program);
out:
parent = CLUTTER_OFFSCREEN_EFFECT_CLASS (st_scroll_view_fade_parent_class);
parent->paint_target (effect);
}
static void
clutter_shader_effect_update_uniforms (ClutterShaderEffect *effect)
{
ClutterShaderEffectPrivate *priv = effect->priv;
GHashTableIter iter;
gpointer key, value;
gsize size;
if (priv->program == COGL_INVALID_HANDLE)
return;
if (priv->uniforms == NULL)
return;
key = value = NULL;
g_hash_table_iter_init (&iter, priv->uniforms);
while (g_hash_table_iter_next (&iter, &key, &value))
{
ShaderUniform *uniform = value;
if (uniform->location == -1)
uniform->location = cogl_program_get_uniform_location (priv->program,
uniform->name);
if (CLUTTER_VALUE_HOLDS_SHADER_FLOAT (&uniform->value))
{
const GLfloat *floats;
floats = clutter_value_get_shader_float (&uniform->value, &size);
cogl_program_set_uniform_float (priv->program, uniform->location,
size, 1,
floats);
}
else if (CLUTTER_VALUE_HOLDS_SHADER_INT (&uniform->value))
{
const GLint *ints;
ints = clutter_value_get_shader_int (&uniform->value, &size);
cogl_program_set_uniform_int (priv->program, uniform->location,
size, 1,
ints);
}
else if (CLUTTER_VALUE_HOLDS_SHADER_MATRIX (&uniform->value))
{
const GLfloat *matrix;
matrix = clutter_value_get_shader_matrix (&uniform->value, &size);
cogl_program_set_uniform_matrix (priv->program, uniform->location,
size, 1,
FALSE,
matrix);
}
else if (G_VALUE_HOLDS_FLOAT (&uniform->value))
{
const GLfloat float_val = g_value_get_float (&uniform->value);
cogl_program_set_uniform_float (priv->program, uniform->location,
1, 1,
&float_val);
}
else if (G_VALUE_HOLDS_DOUBLE (&uniform->value))
{
const GLfloat float_val =
(GLfloat) g_value_get_double (&uniform->value);
cogl_program_set_uniform_float (priv->program, uniform->location,
1, 1,
&float_val);
}
else if (G_VALUE_HOLDS_INT (&uniform->value))
{
const GLint int_val = g_value_get_int (&uniform->value);
cogl_program_set_uniform_int (priv->program, uniform->location,
1, 1,
&int_val);
}
else
g_warning ("Invalid uniform of type '%s' for name '%s'",
g_type_name (G_VALUE_TYPE (&uniform->value)),
uniform->name);
}
}
/**
* clutter_shader_set_uniform:
* @shader: a #ClutterShader.
* @name: name of uniform in GLSL shader program to set.
* @value: a #ClutterShaderFloat, #ClutterShaderInt or #ClutterShaderMatrix
* #GValue.
*
* Sets a user configurable variable in the GLSL shader programs attached to
* a #ClutterShader.
*
* Since: 1.0
*
* Deprecated: 1.8: Use #ClutterShaderEffect instead.
*/
void
clutter_shader_set_uniform (ClutterShader *shader,
const gchar *name,
const GValue *value)
{
ClutterShaderPrivate *priv;
int location = 0;
gsize size;
g_return_if_fail (CLUTTER_IS_SHADER (shader));
g_return_if_fail (name != NULL);
g_return_if_fail (value != NULL);
g_return_if_fail (CLUTTER_VALUE_HOLDS_SHADER_FLOAT (value) ||
CLUTTER_VALUE_HOLDS_SHADER_INT (value) ||
CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value) ||
G_VALUE_HOLDS_FLOAT (value) ||
G_VALUE_HOLDS_INT (value));
priv = shader->priv;
g_return_if_fail (priv->program != COGL_INVALID_HANDLE);
location = cogl_program_get_uniform_location (priv->program, name);
if (CLUTTER_VALUE_HOLDS_SHADER_FLOAT (value))
{
const float *floats;
floats = clutter_value_get_shader_float (value, &size);
cogl_program_set_uniform_float (priv->program,
location, size, 1, floats);
}
else if (CLUTTER_VALUE_HOLDS_SHADER_INT (value))
{
const int *ints;
ints = clutter_value_get_shader_int (value, &size);
cogl_program_set_uniform_int (priv->program,
location, size, 1, ints);
}
else if (CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value))
{
const float *matrix;
matrix = clutter_value_get_shader_matrix (value, &size);
cogl_program_set_uniform_matrix (priv->program,
location, size, 1, FALSE, matrix);
}
else if (G_VALUE_HOLDS_FLOAT (value))
{
float float_val = g_value_get_float (value);
cogl_program_set_uniform_float (priv->program,
location, 1, 1, &float_val);
}
else if (G_VALUE_HOLDS_INT (value))
{
int int_val = g_value_get_int (value);
cogl_program_set_uniform_int (priv->program,
location, 1, 1, &int_val);
}
else
g_assert_not_reached ();
}
