static void
emit_vertex_buffer_geometry (CoglPangoDisplayListNode *node)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* It's expensive to go through the Cogl journal for large runs
* of text in part because the journal transforms the quads in software
* to avoid changing the modelview matrix. So for larger runs of text
* we load the vertices into a VBO, and this has the added advantage
* that if the text doesn't change from frame to frame the VBO can
* be re-used avoiding the repeated cost of validating the data and
* mapping it into the GPU... */
if (node->d.texture.vertex_buffer == COGL_INVALID_HANDLE)
{
CoglHandle vb = cogl_vertex_buffer_new (node->d.texture.verts->len);
cogl_vertex_buffer_add (vb, "gl_Vertex", 2,
COGL_ATTRIBUTE_TYPE_FLOAT, FALSE,
sizeof (CoglPangoDisplayListVertex),
&g_array_index (node->d.texture.verts,
CoglPangoDisplayListVertex, 0).x);
cogl_vertex_buffer_add (vb, "gl_MultiTexCoord0", 2,
COGL_ATTRIBUTE_TYPE_FLOAT, FALSE,
sizeof (CoglPangoDisplayListVertex),
&g_array_index (node->d.texture.verts,
CoglPangoDisplayListVertex,
0).t_x);
cogl_vertex_buffer_submit (vb);
node->d.texture.vertex_buffer = vb;
}
#ifdef CLUTTER_COGL_HAS_GL
if (ctx->driver == COGL_DRIVER_GL)
cogl_vertex_buffer_draw (node->d.texture.vertex_buffer,
GL_QUADS,
0, node->d.texture.verts->len);
else
#endif
{
/* GLES doesn't support GL_QUADS so instead we use a VBO with
indexed vertices to generate GL_TRIANGLES from the quads */
int n_indices = node->d.texture.verts->len / 4 * 6;
CoglHandle indices_vbo
= cogl_vertex_buffer_indices_get_for_quads (n_indices);
cogl_vertex_buffer_draw_elements (node->d.texture.vertex_buffer,
COGL_VERTICES_MODE_TRIANGLES,
indices_vbo,
0, node->d.texture.verts->len - 1,
0, n_indices);
}
}
static void
mx_fade_effect_paint_target (ClutterOffscreenEffect *effect)
{
guint8 opacity;
CoglColor color;
ClutterActor *actor;
CoglMaterial *material = clutter_offscreen_effect_get_target (effect);
MxFadeEffect *self = MX_FADE_EFFECT (effect);
MxFadeEffectPrivate *priv = self->priv;
if (priv->update_vbo)
mx_fade_effect_update_vbo (self);
if (!priv->vbo || !priv->indices || !material)
return;
/* Set the blend string if the material has changed so we can blend with
* the paint opacity.
*/
if (material != priv->old_material)
{
GError *error = NULL;
priv->old_material = material;
if (!cogl_material_set_layer_combine (material, 1,
"RGBA = MODULATE(PREVIOUS,CONSTANT)", &error))
{
g_warning (G_STRLOC ": Error setting layer combine blend string: %s",
error->message);
g_error_free (error);
}
}
/* Set the layer-combine constant so the texture is blended with the paint
* opacity when painted.
*/
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
opacity = clutter_actor_get_paint_opacity (actor);
cogl_color_init_from_4ub (&color, opacity, opacity, opacity, opacity);
cogl_material_set_layer_combine_constant (material, 1, &color);
/* Draw the texture */
cogl_set_source (material);
cogl_vertex_buffer_draw_elements (priv->vbo,
COGL_VERTICES_MODE_TRIANGLES,
priv->indices,
0,
(priv->n_quads * 4) - 1,
0,
priv->n_quads * 6);
}
static void
on_paint (ClutterActor *actor, TestState *state)
{
cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff);
cogl_vertex_buffer_draw_elements (state->buffer,
COGL_VERTICES_MODE_TRIANGLE_STRIP,
state->indices,
0, /* min index */
(MESH_WIDTH + 1) *
(MESH_HEIGHT + 1) - 1, /* max index */
0, /* indices offset */
state->n_static_indices);
}
/**
* mash_data_render:
* @self: A #MashData instance
*
* Renders the data contained in the model to the Clutter
* scene. The current Cogl source material will be used to affect the
* appearance of the model. This function is not usually called
* directly but instead the #MashData instance is added to a
* #MashModel and this function will be automatically called by
* the paint method of the model.
*/
void
mash_data_render (MashData *self, CoglPipeline* pl){
MashDataPrivate *priv;
g_return_if_fail (MASH_IS_DATA (self));
priv = self->priv;
if (priv->loaded_data.prim != NULL){
CoglFramebuffer *fb = /*(CoglFramebuffer*)*/ cogl_get_draw_framebuffer();
cogl_primitive_draw(priv->loaded_data.prim, fb, pl);
}
else if(priv->loaded_data.vertices_vbo != NULL && priv->loaded_data.indices != NULL){
cogl_vertex_buffer_draw_elements (priv->loaded_data.vertices_vbo,
COGL_VERTICES_MODE_TRIANGLES,
priv->loaded_data.indices,
priv->loaded_data.min_index,
priv->loaded_data.max_index,
0, priv->loaded_data.n_triangles * 3);
}
}
static void
clutter_deform_effect_paint_target (ClutterOffscreenEffect *effect)
{
ClutterDeformEffect *self= CLUTTER_DEFORM_EFFECT (effect);
ClutterDeformEffectPrivate *priv = self->priv;
gboolean is_depth_enabled, is_cull_enabled;
CoglHandle material;
gint n_tiles;
if (priv->is_dirty)
{
ClutterActor *actor;
gfloat width, height;
guint opacity;
gint i, j;
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
opacity = clutter_actor_get_paint_opacity (actor);
/* if we don't have a target size, fall back to the actor's
* allocation, though wrong it might be
*/
if (!clutter_offscreen_effect_get_target_size (effect, &width, &height))
clutter_actor_get_size (actor, &width, &height);
for (i = 0; i < priv->y_tiles + 1; i++)
{
for (j = 0; j < priv->x_tiles + 1; j++)
{
CoglTextureVertex *vertex;
vertex = &priv->vertices[(i * (priv->x_tiles + 1)) + j];
vertex->tx = (float) j / priv->x_tiles;
vertex->ty = (float) i / priv->y_tiles;
vertex->x = width * vertex->tx;
vertex->y = height * vertex->ty;
vertex->z = 0.0f;
cogl_color_init_from_4ub (&vertex->color, 255, 255, 255, opacity);
_clutter_deform_effect_deform_vertex (self, width, height, vertex);
}
}
/* XXX in theory, the sub-classes should tell us what they changed
* in the texture vertices; we then would be able to avoid resubmitting
* the same data, if it did not change. for the time being, we resubmit
* everything
*/
cogl_vertex_buffer_add (priv->vbo, "gl_Vertex",
3,
COGL_ATTRIBUTE_TYPE_FLOAT,
FALSE,
sizeof (CoglTextureVertex),
&priv->vertices->x);
cogl_vertex_buffer_add (priv->vbo, "gl_MultiTexCoord0",
2,
COGL_ATTRIBUTE_TYPE_FLOAT,
FALSE,
sizeof (CoglTextureVertex),
&priv->vertices->tx);
cogl_vertex_buffer_add (priv->vbo, "gl_Color",
4,
COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE,
FALSE,
sizeof (CoglTextureVertex),
&priv->vertices->color);
priv->is_dirty = FALSE;
}
/* enable depth test, if it's not already enabled */
is_depth_enabled = cogl_get_depth_test_enabled ();
if (!is_depth_enabled)
cogl_set_depth_test_enabled (TRUE);
/* enable backface culling if it's not already enabled and if
* we have a back material
*/
is_cull_enabled = cogl_get_backface_culling_enabled ();
if (priv->back_material != COGL_INVALID_HANDLE && !is_cull_enabled)
cogl_set_backface_culling_enabled (TRUE);
else if (priv->back_material == COGL_INVALID_HANDLE && is_cull_enabled)
cogl_set_backface_culling_enabled (FALSE);
n_tiles = (priv->x_tiles + 1) * (priv->y_tiles + 1);
/* draw the front */
material = clutter_offscreen_effect_get_target (effect);
if (material != COGL_INVALID_HANDLE)
{
cogl_set_source (material);
cogl_vertex_buffer_draw_elements (priv->vbo,
COGL_VERTICES_MODE_TRIANGLE_STRIP,
priv->indices,
0,
n_tiles,
0,
priv->n_indices);
}
/* draw the back */
material = priv->back_material;
if (material != COGL_INVALID_HANDLE)
{
cogl_set_source (priv->back_material);
cogl_vertex_buffer_draw_elements (priv->vbo,
COGL_VERTICES_MODE_TRIANGLE_STRIP,
priv->back_indices,
0,
n_tiles,
0,
priv->n_indices);
}
/* restore the previous state */
if (!is_depth_enabled)
cogl_set_depth_test_enabled (FALSE);
if (priv->back_material != COGL_INVALID_HANDLE && !is_cull_enabled)
cogl_set_backface_culling_enabled (FALSE);
else if (priv->back_material == COGL_INVALID_HANDLE && is_cull_enabled)
cogl_set_backface_culling_enabled (TRUE);
}
