/**
* 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 ();
}
void
cogl_program_uniform_1i (int uniform_no,
gint value)
{
cogl_program_uniform_int (uniform_no, 1, 1, &value);
}
