// cairo_public cairo_region_t *
// cairo_region_reference (cairo_region_t *region);
static int l_cairo_region_reference (lua_State* L)
{
cairo_region_t *region = get_cairo_region_t (L, 1);
cairo_region_t *v = cairo_region_reference (region);
lua_pushlightuserdata(L, v);
return 1;
}
static cairo_int_status_t
_cairo_gl_composite_setup_clipping (cairo_gl_composite_t *setup,
cairo_gl_context_t *ctx,
int vertex_size)
{
if (! _cairo_gl_context_is_flushed (ctx) &&
(! cairo_region_equal (ctx->clip_region, setup->clip_region) ||
! _cairo_clip_equal (ctx->clip, setup->clip)))
_cairo_gl_composite_flush (ctx);
cairo_region_destroy (ctx->clip_region);
ctx->clip_region = cairo_region_reference (setup->clip_region);
_cairo_clip_destroy (ctx->clip);
ctx->clip = _cairo_clip_copy (setup->clip);
assert (!setup->clip_region || !setup->clip);
if (ctx->clip_region) {
_disable_stencil_buffer ();
glEnable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
if (ctx->clip)
return _cairo_gl_composite_setup_painted_clipping (setup, ctx,
vertex_size);
_disable_stencil_buffer ();
glDisable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
static GtkSnapshotState *
gtk_snapshot_state_new (GtkSnapshotState *parent,
char *name,
cairo_region_t *clip,
double translate_x,
double translate_y,
GtkSnapshotCollectFunc collect_func,
gpointer collect_data)
{
GtkSnapshotState *state;
state = g_slice_new0 (GtkSnapshotState);
state->nodes = g_ptr_array_new_with_free_func ((GDestroyNotify) gsk_render_node_unref);
state->parent = parent;
state->name = name;
if (clip)
state->clip_region = cairo_region_reference (clip);
state->translate_x = translate_x;
state->translate_y = translate_y;
state->collect_func = collect_func;
state->collect_data = collect_data;
return state;
}
void
_gdk_x11_window_queue_antiexpose (GdkWindow *window,
cairo_region_t *area)
{
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
item->antiexpose_area = cairo_region_reference (area);
gdk_window_queue (window, item);
}
void
meta_surface_actor_set_input_region (MetaSurfaceActor *self,
cairo_region_t *region)
{
MetaSurfaceActorPrivate *priv = self->priv;
if (priv->input_region)
cairo_region_destroy (priv->input_region);
if (region)
priv->input_region = cairo_region_reference (region);
else
priv->input_region = NULL;
}
/**
* goc_canvas_invalidate_region:
* @canvas: #GocCanvas
* @item: the item to redraw
* @region: the region to redraw
*
* Invalidates a region of the canvas. Only @item will be redrawn if the next
* draw event is called with a cairo contest clipped to @region. Used in
* gnumeric for the walking ants cursor.
**/
void
goc_canvas_invalidate_region (GocCanvas *canvas, GocItem *item, cairo_region_t *region)
{
GocCanvasPrivate *priv;
g_return_if_fail (GOC_IS_CANVAS (canvas));
g_return_if_fail (item && region);
priv = (GocCanvasPrivate *) canvas->priv;
if (priv->invalid_region != NULL)
cairo_region_destroy (priv->invalid_region);
priv->invalidated_item = item;
priv->invalid_region = cairo_region_reference (region);
priv->done = FALSE;
gtk_widget_queue_draw_region (GTK_WIDGET (canvas), region);
}
static void
_gjs_cairo_region_construct_internal(JSContext *context,
JSObject *obj,
cairo_region_t *region)
{
GjsCairoRegion *priv;
priv = g_slice_new0(GjsCairoRegion);
g_assert(priv_from_js(context, obj) == NULL);
JS_SetPrivate(obj, priv);
priv->context = context;
priv->object = obj;
priv->region = cairo_region_reference(region);
}
static cairo_int_status_t
_cairo_gl_composite_setup_clipping (cairo_gl_composite_t *setup,
cairo_gl_context_t *ctx,
int vertex_size)
{
cairo_bool_t clip_changing = TRUE;
cairo_bool_t clip_region_changing = TRUE;
if (! ctx->clip && ! setup->clip && ! setup->clip_region && ! ctx->clip_region)
goto disable_all_clipping;
clip_changing = ! _cairo_clip_equal (ctx->clip, setup->clip);
clip_region_changing = ! cairo_region_equal (ctx->clip_region, setup->clip_region);
if (! _cairo_gl_context_is_flushed (ctx) &&
(clip_region_changing || clip_changing))
_cairo_gl_composite_flush (ctx);
assert (!setup->clip_region || !setup->clip);
/* setup->clip is only used by the msaa compositor and setup->clip_region
* only by the other compositors, so it's safe to wait to clean up obsolete
* clips. */
if (clip_region_changing) {
cairo_region_destroy (ctx->clip_region);
ctx->clip_region = cairo_region_reference (setup->clip_region);
}
if (clip_changing) {
_cairo_clip_destroy (ctx->clip);
ctx->clip = _cairo_clip_copy (setup->clip);
}
/* For clip regions, we scissor right before drawing. */
if (setup->clip_region)
goto disable_all_clipping;
if (setup->clip)
return _cairo_gl_composite_setup_painted_clipping (setup, ctx,
vertex_size);
disable_all_clipping:
_disable_stencil_buffer ();
glDisable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_status_t
_cairo_gl_composite_begin (cairo_gl_composite_t *setup,
cairo_gl_context_t **ctx_out)
{
unsigned int dst_size, src_size, mask_size, vertex_size;
cairo_gl_context_t *ctx;
cairo_status_t status;
cairo_bool_t component_alpha;
cairo_gl_shader_t *shader;
assert (setup->dst);
status = _cairo_gl_context_acquire (setup->dst->base.device, &ctx);
if (unlikely (status))
return status;
glEnable (GL_BLEND);
component_alpha =
setup->mask.type == CAIRO_GL_OPERAND_TEXTURE &&
setup->mask.texture.attributes.has_component_alpha;
/* Do various magic for component alpha */
if (component_alpha) {
status = _cairo_gl_composite_begin_component_alpha (ctx, setup);
if (unlikely (status))
goto FAIL;
} else {
if (ctx->pre_shader) {
_cairo_gl_composite_flush (ctx);
ctx->pre_shader = NULL;
}
}
status = _cairo_gl_get_shader_by_type (ctx,
&setup->src,
&setup->mask,
setup->spans,
component_alpha ?
CAIRO_GL_SHADER_IN_CA_SOURCE :
CAIRO_GL_SHADER_IN_NORMAL,
&shader);
if (unlikely (status)) {
ctx->pre_shader = NULL;
goto FAIL;
}
if (ctx->current_shader != shader)
_cairo_gl_composite_flush (ctx);
status = CAIRO_STATUS_SUCCESS;
dst_size = 2 * sizeof (GLfloat);
src_size = _cairo_gl_operand_get_vertex_size (setup->src.type);
mask_size = _cairo_gl_operand_get_vertex_size (setup->mask.type);
vertex_size = dst_size + src_size + mask_size;
if (setup->spans)
vertex_size += sizeof (GLfloat);
if (ctx->vertex_size != vertex_size)
_cairo_gl_composite_flush (ctx);
_cairo_gl_context_set_destination (ctx, setup->dst);
if (_cairo_gl_context_is_flushed (ctx)) {
ctx->dispatch.BindBuffer (GL_ARRAY_BUFFER, ctx->vbo);
ctx->dispatch.VertexAttribPointer (CAIRO_GL_VERTEX_ATTRIB_INDEX, 2,
GL_FLOAT, GL_FALSE, vertex_size, NULL);
ctx->dispatch.EnableVertexAttribArray (CAIRO_GL_VERTEX_ATTRIB_INDEX);
}
_cairo_gl_context_setup_operand (ctx, CAIRO_GL_TEX_SOURCE, &setup->src, vertex_size, dst_size);
_cairo_gl_context_setup_operand (ctx, CAIRO_GL_TEX_MASK, &setup->mask, vertex_size, dst_size + src_size);
if (setup->spans)
_cairo_gl_context_setup_spans (ctx, vertex_size, dst_size + src_size + mask_size);
else
ctx->dispatch.DisableVertexAttribArray (CAIRO_GL_COLOR_ATTRIB_INDEX);
_cairo_gl_set_operator (ctx, setup->op, component_alpha);
ctx->vertex_size = vertex_size;
if (_cairo_gl_context_is_flushed (ctx)) {
if (ctx->pre_shader) {
_cairo_gl_set_shader (ctx, ctx->pre_shader);
_cairo_gl_composite_bind_to_shader (ctx, setup);
}
_cairo_gl_set_shader (ctx, shader);
_cairo_gl_composite_bind_to_shader (ctx, setup);
}
if (! _cairo_gl_context_is_flushed (ctx) &&
! cairo_region_equal (ctx->clip_region, setup->clip_region))
_cairo_gl_composite_flush (ctx);
cairo_region_destroy (ctx->clip_region);
ctx->clip_region = cairo_region_reference (setup->clip_region);
if (ctx->clip_region)
glEnable (GL_SCISSOR_TEST);
else
glDisable (GL_SCISSOR_TEST);
*ctx_out = ctx;
FAIL:
if (unlikely (status))
status = _cairo_gl_context_release (ctx, status);
return status;
}