static cairo_int_status_t
_scissor_and_clip (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
cairo_composite_rectangles_t *composite,
cairo_bool_t *used_stencil_buffer)
{
cairo_gl_surface_t *dst = (cairo_gl_surface_t *) composite->surface;
cairo_rectangle_int_t *bounds = &composite->unbounded;
cairo_clip_t *clip = composite->clip;
cairo_rectangle_int_t r;
*used_stencil_buffer = FALSE;
if (_cairo_composite_rectangles_can_reduce_clip (composite, clip)) {
_scissor_to_rectangle (dst, bounds);
return CAIRO_INT_STATUS_SUCCESS;
}
/* If we cannot reduce the clip to a rectangular region,
we scissor and clip using the stencil buffer */
if (clip->num_boxes > 1 || clip->path != NULL) {
*used_stencil_buffer = TRUE;
_scissor_to_rectangle (dst, bounds);
return _draw_clip_to_stencil_buffer (ctx, setup, clip);
}
/* Always interpret the clip path as ANTIALIAS_NONE */
_cairo_box_round_to_rectangle (clip->boxes, &r);
_scissor_to_rectangle (dst, &r);
return CAIRO_INT_STATUS_SUCCESS;
}
static void
_cairo_gl_composite_draw_triangles_with_clip_region (cairo_gl_context_t *ctx,
unsigned int count)
{
int i, num_rectangles;
if (!ctx->clip_region) {
_cairo_gl_composite_draw_triangles (ctx, count);
return;
}
num_rectangles = cairo_region_num_rectangles (ctx->clip_region);
for (i = 0; i < num_rectangles; i++) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (ctx->clip_region, i, &rect);
_scissor_to_rectangle (ctx->current_target, &rect);
_cairo_gl_composite_draw_triangles (ctx, count);
}
}
