static cairo_status_t alpha_blend_boxes (cairo_win32_display_surface_t *dst, const cairo_pattern_t *source, cairo_boxes_t *boxes, uint8_t alpha) { const cairo_surface_pattern_t *pattern; struct copy_box cb; cairo_surface_t *surface; cairo_win32_display_surface_t *src; cairo_status_t status; TRACE ((stderr, "%s\n", __FUNCTION__)); if (source->type != CAIRO_PATTERN_TYPE_SURFACE) return CAIRO_INT_STATUS_UNSUPPORTED; pattern = (const cairo_surface_pattern_t *) source; surface = _cairo_surface_get_source (pattern->surface, &cb.limit); if (surface->type == CAIRO_SURFACE_TYPE_IMAGE) { surface = to_image_surface(surface)->parent; if (surface == NULL) return CAIRO_INT_STATUS_UNSUPPORTED; } if (surface->type != CAIRO_SURFACE_TYPE_WIN32) return CAIRO_INT_STATUS_UNSUPPORTED; if (! _cairo_matrix_is_integer_translation (&source->matrix, &cb.tx, &cb.ty)) return CAIRO_INT_STATUS_UNSUPPORTED; src = to_win32_display_surface (surface); cb.dst = dst->win32.dc; cb.src = src->win32.dc; /* First check that the data is entirely within the image */ if (! _cairo_boxes_for_each_box (boxes, source_contains_box, &cb)) return CAIRO_INT_STATUS_UNSUPPORTED; status = __cairo_surface_flush (&src->win32.base, 0); if (status) return status; cb.bf.BlendOp = AC_SRC_OVER; cb.bf.BlendFlags = 0; cb.bf.SourceConstantAlpha = alpha; cb.bf.AlphaFormat = (src->win32.format == CAIRO_FORMAT_ARGB32) ? AC_SRC_ALPHA : 0; cb.alpha_blend = to_win32_device(dst->win32.base.device)->alpha_blend; cb.tx += cb.limit.x; cb.ty += cb.limit.y; status = CAIRO_STATUS_SUCCESS; if (! _cairo_boxes_for_each_box (boxes, alpha_box, &cb)) status = CAIRO_INT_STATUS_UNSUPPORTED; _cairo_win32_display_surface_discard_fallback (dst); return status; }
static cairo_status_t copy_boxes (cairo_win32_display_surface_t *dst, const cairo_pattern_t *source, cairo_boxes_t *boxes) { const cairo_surface_pattern_t *pattern; struct copy_box cb; cairo_surface_t *surface; cairo_status_t status; cairo_win32_surface_t *src; TRACE ((stderr, "%s\n", __FUNCTION__)); pattern = (const cairo_surface_pattern_t *) source; surface = _cairo_surface_get_source (pattern->surface, &cb.limit); if (surface->type == CAIRO_SURFACE_TYPE_IMAGE) { surface = to_image_surface(surface)->parent; if (surface == NULL) return CAIRO_INT_STATUS_UNSUPPORTED; } if (surface->type != CAIRO_SURFACE_TYPE_WIN32) return CAIRO_INT_STATUS_UNSUPPORTED; if (! _cairo_matrix_is_integer_translation (&source->matrix, &cb.tx, &cb.ty)) return CAIRO_INT_STATUS_UNSUPPORTED; src = to_win32_surface(surface); if (src->format != dst->win32.format && !(src->format == CAIRO_FORMAT_ARGB32 && dst->win32.format == CAIRO_FORMAT_RGB24)) { /* forbid copy different surfaces unless it is from argb32 to * rgb (dropping alpha) */ return CAIRO_INT_STATUS_UNSUPPORTED; } cb.dst = dst->win32.dc; cb.src = src->dc; /* First check that the data is entirely within the image */ if (! _cairo_boxes_for_each_box (boxes, source_contains_box, &cb)) return CAIRO_INT_STATUS_UNSUPPORTED; status = __cairo_surface_flush (surface, 0); if (status) return status; cb.tx += cb.limit.x; cb.ty += cb.limit.y; status = CAIRO_STATUS_SUCCESS; if (! _cairo_boxes_for_each_box (boxes, copy_box, &cb)) status = CAIRO_INT_STATUS_UNSUPPORTED; _cairo_win32_display_surface_discard_fallback (dst); return status; }