void
cogl_path_stroke (CoglPath *path,
CoglFramebuffer *framebuffer,
CoglPipeline *pipeline)
{
CoglPathData *data;
CoglPipeline *copy = NULL;
unsigned int path_start;
int path_num = 0;
CoglPathNode *node;
_COGL_RETURN_IF_FAIL (cogl_is_path (path));
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (framebuffer));
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
data = path->data;
if (data->path_nodes->len == 0)
return;
if (cogl_pipeline_get_n_layers (pipeline) != 0)
{
copy = cogl_pipeline_copy (pipeline);
_cogl_pipeline_prune_to_n_layers (copy, 0);
pipeline = copy;
}
_cogl_path_build_stroke_attribute_buffer (path);
for (path_start = 0;
path_start < data->path_nodes->len;
path_start += node->path_size)
{
CoglPrimitive *primitive;
node = &g_array_index (data->path_nodes, CoglPathNode, path_start);
primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_LINE_STRIP,
node->path_size,
&data->stroke_attributes[path_num],
1);
cogl_primitive_draw (primitive, framebuffer, pipeline);
cogl_object_unref (primitive);
path_num++;
}
if (copy)
cogl_object_unref (copy);
}
static void
_cogl_path_stroke_nodes (CoglPath *path)
{
CoglPathData *data = path->data;
CoglPipeline *copy = NULL;
CoglPipeline *source;
unsigned int path_start;
int path_num = 0;
CoglPathNode *node;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
source = cogl_get_source ();
if (cogl_pipeline_get_n_layers (source) != 0)
{
copy = cogl_pipeline_copy (source);
_cogl_pipeline_prune_to_n_layers (copy, 0);
source = copy;
}
_cogl_path_build_stroke_attribute_buffer (path);
cogl_push_source (source);
for (path_start = 0;
path_start < data->path_nodes->len;
path_start += node->path_size)
{
node = &g_array_index (data->path_nodes, CoglPathNode, path_start);
cogl_framebuffer_vdraw_attributes (cogl_get_draw_framebuffer (),
source,
COGL_VERTICES_MODE_LINE_STRIP,
0, node->path_size,
data->stroke_attributes[path_num],
NULL);
path_num++;
}
cogl_pop_source ();
if (copy)
cogl_object_unref (copy);
}
static CoglBool
_cogl_rectangles_validate_layer_cb (CoglPipeline *pipeline,
int layer_index,
void *user_data)
{
ValidateLayerState *state = user_data;
CoglTexture *texture;
state->i++;
/* We need to ensure the mipmaps are ready before deciding
* anything else about the texture because the texture storage
* could completely change if it needs to be migrated out of the
* atlas and will affect how we validate the layer.
*
* FIXME: this needs to be generalized. There could be any
* number of things that might require a shuffling of the
* underlying texture storage. We could add two mechanisms to
* generalize this a bit...
*
* 1) add a _cogl_pipeline_layer_update_storage() function that
* would for instance consider if mipmapping is necessary and
* potentially migrate the texture from an atlas.
*
* 2) allow setting of transient primitive-flags on a pipeline
* that may affect the outcome of _update_storage(). One flag
* could indicate that we expect to sample beyond the bounds of
* the texture border.
*
* flags = COGL_PIPELINE_PRIMITIVE_FLAG_VALID_BORDERS;
* _cogl_pipeline_layer_assert_primitive_flags (layer, flags)
* _cogl_pipeline_layer_update_storage (layer)
* enqueue primitive in journal
*
* when the primitive is dequeued and drawn we should:
* _cogl_pipeline_flush_gl_state (pipeline)
* draw primitive
* _cogl_pipeline_unassert_primitive_flags (layer, flags);
*
* _cogl_pipeline_layer_update_storage should take into
* consideration all the asserted primitive requirements. (E.g.
* there could be multiple primitives in the journal - or in a
* renderlist in the future - that need mipmaps or that need
* valid contents beyond their borders (for cogl_polygon)
* meaning they can't work with textures in an atas, so
* _cogl_pipeline_layer_update_storage would pass on these
* requirements to the texture atlas backend which would make
* sure the referenced texture is migrated out of the atlas and
* mipmaps are generated.)
*/
_cogl_pipeline_pre_paint_for_layer (pipeline, layer_index);
texture = cogl_pipeline_get_layer_texture (pipeline, layer_index);
/* NULL textures are handled by
* _cogl_pipeline_flush_gl_state */
if (texture == NULL)
return TRUE;
if (state->i == 0)
state->first_layer = layer_index;
/* XXX:
* For now, if the first layer is sliced then all other layers are
* ignored since we currently don't support multi-texturing with
* sliced textures. If the first layer is not sliced then any other
* layers found to be sliced will be skipped. (with a warning)
*
* TODO: Add support for multi-texturing rectangles with sliced
* textures if no texture matrices are in use.
*/
if (cogl_texture_is_sliced (texture))
{
if (state->i == 0)
{
if (cogl_pipeline_get_n_layers (pipeline) > 1)
{
static CoglBool warning_seen = FALSE;
if (!state->override_source)
state->override_source = cogl_pipeline_copy (pipeline);
_cogl_pipeline_prune_to_n_layers (state->override_source, 1);
if (!warning_seen)
g_warning ("Skipping layers 1..n of your pipeline since "
"the first layer is sliced. We don't currently "
"support any multi-texturing with sliced "
"textures but assume layer 0 is the most "
"important to keep");
warning_seen = TRUE;
}
state->all_use_sliced_quad_fallback = TRUE;
return FALSE;
}
else
{
static CoglBool warning_seen = FALSE;
CoglTexture2D *tex_2d;
if (!warning_seen)
g_warning ("Skipping layer %d of your pipeline consisting of "
"a sliced texture (unsuported for multi texturing)",
state->i);
warning_seen = TRUE;
/* Note: currently only 2D textures can be sliced. */
tex_2d = state->ctx->default_gl_texture_2d_tex;
cogl_pipeline_set_layer_texture (pipeline, layer_index,
COGL_TEXTURE (tex_2d));
return TRUE;
}
}
#ifdef COGL_ENABLE_DEBUG
/* If the texture can't be repeated with the GPU (e.g. because it has
* waste or if using GL_TEXTURE_RECTANGLE_ARB) then if a texture matrix
* is also in use we don't know if the result will end up trying
* to texture from the waste area.
*
* Note: we check can_hardware_repeat() first since it's cheaper.
*
* Note: cases where the texture coordinates will require repeating
* will be caught by later validation.
*/
if (!_cogl_texture_can_hardware_repeat (texture) &&
_cogl_pipeline_layer_has_user_matrix (pipeline, layer_index))
{
static CoglBool warning_seen = FALSE;
if (!warning_seen)
g_warning ("layer %d of your pipeline uses a custom "
"texture matrix but because the texture doesn't "
"support hardware repeating you may see artefacts "
"due to sampling beyond the texture's bounds.",
state->i);
warning_seen = TRUE;
}
#endif
return TRUE;
}
