/**
* 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
*/
void
clutter_shader_set_uniform (ClutterShader *shader,
const gchar *name,
const GValue *value)
{
ClutterShaderPrivate *priv;
GLint 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 GLfloat *floats;
floats = clutter_value_get_shader_float (value, &size);
cogl_program_uniform_float (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_uniform_int (location, size, 1, ints);
}
else if (CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value))
{
const GLfloat *matrix;
matrix = clutter_value_get_shader_matrix (value, &size);
cogl_program_uniform_matrix (location, size, 1, FALSE, matrix);
}
else if (G_VALUE_HOLDS_FLOAT (value))
{
GLfloat float_val = g_value_get_float (value);
cogl_program_uniform_float (location, 1, 1, &float_val);
}
else if (G_VALUE_HOLDS_INT (value))
{
int int_val = g_value_get_int (value);
cogl_program_uniform_int (location, 1, 1, &int_val);
}
else
g_assert_not_reached ();
}
/**
* clutter_actor_set_shader_param:
* @self: a #ClutterActor
* @param: the name of the parameter
* @value: the value of the parameter
*
* Sets the value for a named parameter of the shader applied
* to @actor.
*
* Since: 1.0
*
* Deprecated: 1.8: Use clutter_shader_effect_set_uniform_value() instead
*/
void
clutter_actor_set_shader_param (ClutterActor *self,
const gchar *param,
const GValue *value)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (param != 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));
clutter_actor_set_shader_param_internal (self, param, value);
}
/**
* clutter_value_get_shader_matrix:
* @value: a #GValue
* @length: (out): return location for the number of returned floating
* point values, or %NULL
*
* Retrieves a matrix of floating point values stored inside
* the passed #GValue. @value must have been initialized with
* %CLUTTER_TYPE_SHADER_MATRIX.
*
* Return value: (array length=length) (transfer none): the pointer to a matrix
* of floating point values. The returned value is owned by the #GValue and
* should never be modified or freed.
*
*
*/
const gfloat *
clutter_value_get_shader_matrix (const GValue *value,
gsize *length)
{
ClutterShaderMatrix *shader_matrix;
g_return_val_if_fail (CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value), NULL);
shader_matrix = value->data[0].v_pointer;
if (length)
*length = shader_matrix->size;
return shader_matrix->value;
}
/**
* clutter_value_set_shader_matrix:
* @value: a #GValue
* @size: number of floating point values in @floats
* @matrix: (array length=size): a matrix of floating point values
*
* Sets @matrix as the contents of @value. The passed #GValue
* must have been initialized using %CLUTTER_TYPE_SHADER_MATRIX.
*
*
*/
void
clutter_value_set_shader_matrix (GValue *value,
gint size,
const gfloat *matrix)
{
ClutterShaderMatrix *shader_matrix;
gint i;
g_return_if_fail (CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value));
g_return_if_fail (size <= 4);
shader_matrix = value->data[0].v_pointer;
shader_matrix->size = size;
for (i = 0; i < size * size; i++)
shader_matrix->value[i] = matrix[i];
}
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);
}
}
