WebSVN – Kolibri OS – Diff – /programs/develop/libraries/cairo/src/cairo-surface-wrapper.c

  *      Chris Wilson
  */
+#include "cairoint.h"
 #include "cairoint.h"
+#include "cairo-clip-inline.h"
 #include "cairo-error-private.h"
-#include "cairo-error-private.h"
+#include "cairo-pattern-private.h"
 #include "cairo-surface-wrapper-private.h"
 			   const cairo_pattern_t *original,
 			   const cairo_matrix_t  *ctm_inverse)
+{
     _cairo_pattern_init_static_copy (pattern, original);
-    /* apply device_transform first so that it is transformed by ctm_inverse */
-    if (original->type == CAIRO_PATTERN_TYPE_SURFACE) {
-	cairo_surface_pattern_t *surface_pattern;
-	cairo_surface_t *surface;
-        surface_pattern = (cairo_surface_pattern_t *) original;
-        surface = surface_pattern->surface;
-	if (_cairo_surface_has_device_transform (surface))
-	    _cairo_pattern_transform (pattern, &surface->device_transform);
-    }
     if (! _cairo_matrix_is_identity (ctm_inverse))
 	_cairo_pattern_transform (pattern, ctm_inverse);
-}
-static inline cairo_bool_t
-_cairo_surface_wrapper_needs_device_transform (cairo_surface_wrapper_t *wrapper)
-{
-    return ! _cairo_matrix_is_identity (&wrapper->target->device_transform);
-}
-static cairo_bool_t
-_cairo_surface_wrapper_needs_extents_transform (cairo_surface_wrapper_t *wrapper)
-{
-    return wrapper->has_extents && (wrapper->extents.x | wrapper->extents.y);
+}
 cairo_status_t
 _cairo_surface_wrapper_acquire_source_image (cairo_surface_wrapper_t *wrapper,
 					     cairo_image_surface_t  **image_out,
 					     void                   *image_extra)
+{
     _cairo_surface_release_source_image (wrapper->target, image, image_extra);
+}
-cairo_status_t
+static void
-_cairo_surface_wrapper_paint (cairo_surface_wrapper_t *wrapper,
+_cairo_surface_wrapper_get_transform (cairo_surface_wrapper_t *wrapper,
-			      cairo_operator_t	 op,
-			      const cairo_pattern_t *source,
-			      cairo_clip_t	    *clip)
+				      cairo_matrix_t *m)
-{
-    cairo_status_t status;
-    cairo_clip_t clip_copy, *dev_clip = clip;
+{
-    cairo_pattern_union_t source_copy;
-    cairo_clip_t target_clip;
+    cairo_matrix_init_identity (m);
-    if (unlikely (wrapper->target->status))
-	return wrapper->target->status;
+    if (wrapper->has_extents && (wrapper->extents.x || wrapper->extents.y))
+	cairo_matrix_translate (m, -wrapper->extents.x, -wrapper->extents.y);
-    if (wrapper->has_extents) {
-	_cairo_clip_init_copy (&target_clip, clip);
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
+    if (! _cairo_matrix_is_identity (&wrapper->transform))
-	if (unlikely (status))
+	cairo_matrix_multiply (m, &wrapper->transform, m);
+    if (! _cairo_matrix_is_identity (&wrapper->target->device_transform))
+	cairo_matrix_multiply (m, &wrapper->target->device_transform, m);
+}
-	    goto FINISH;
+static void
+_cairo_surface_wrapper_get_inverse_transform (cairo_surface_wrapper_t *wrapper,
+					      cairo_matrix_t *m)
+{
+    cairo_matrix_init_identity (m);
+    if (! _cairo_matrix_is_identity (&wrapper->target->device_transform_inverse))
+	cairo_matrix_multiply (m, &wrapper->target->device_transform_inverse, m);
+    if (! _cairo_matrix_is_identity (&wrapper->transform)) {
+	cairo_matrix_t inv;
-	dev_clip = clip = &target_clip;
+	cairo_status_t status;
+	inv = wrapper->transform;
+	status = cairo_matrix_invert (&inv);
+	assert (status == CAIRO_STATUS_SUCCESS);
+	cairo_matrix_multiply (m, &inv, m);
+    }
-    if (clip && clip->all_clipped) {
+    if (wrapper->has_extents && (wrapper->extents.x || wrapper->extents.y))
-	status = CAIRO_STATUS_SUCCESS;
+	cairo_matrix_translate (m, wrapper->extents.x, wrapper->extents.y);
-	goto FINISH;
+}
+static cairo_clip_t *
+_cairo_surface_wrapper_get_clip (cairo_surface_wrapper_t *wrapper,
+				 const cairo_clip_t *clip)
+{
+    cairo_clip_t *copy;
+    copy = _cairo_clip_copy (clip);
+    if (wrapper->has_extents) {
+	copy = _cairo_clip_intersect_rectangle (copy, &wrapper->extents);
     }
+    copy = _cairo_clip_transform (copy, &wrapper->transform);
+    if (! _cairo_matrix_is_identity (&wrapper->target->device_transform))
+	copy = _cairo_clip_transform (copy, &wrapper->target->device_transform);
+    if (wrapper->clip)
+	copy = _cairo_clip_intersect_clip (copy, wrapper->clip);
+    return copy;
+}
-    if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
+cairo_status_t
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
+_cairo_surface_wrapper_paint (cairo_surface_wrapper_t *wrapper,
-    {
+			      cairo_operator_t	 op,
-	cairo_matrix_t m;
+			      const cairo_pattern_t *source,
-	cairo_matrix_init_identity (&m);
+			      const cairo_clip_t    *clip)
+{
+    cairo_status_t status;
-	if (_cairo_surface_wrapper_needs_extents_transform (wrapper))
+    cairo_clip_t *dev_clip;
-	    cairo_matrix_translate (&m, -wrapper->extents.x, -wrapper->extents.y);
+    cairo_pattern_union_t source_copy;
     if (unlikely (wrapper->target->status))
-	if (_cairo_surface_wrapper_needs_device_transform (wrapper))
+	return wrapper->target->status;
 	    cairo_matrix_multiply (&m, &wrapper->target->device_transform, &m);
     dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
-	if (clip != NULL) {
+    if (_cairo_clip_is_all_clipped (dev_clip))
-	    status = _cairo_clip_init_copy_transformed (&clip_copy, clip, &m);
+	return CAIRO_INT_STATUS_NOTHING_TO_DO;
-	    if (unlikely (status))
-		goto FINISH;
-	    dev_clip = &clip_copy;
-	}
     if (wrapper->needs_transform) {
-	status = cairo_matrix_invert (&m);
+	cairo_matrix_t m;
-	assert (status == CAIRO_STATUS_SUCCESS);
+	_cairo_surface_wrapper_get_transform (wrapper, &m);
-	_copy_transformed_pattern (&source_copy.base, source, &m);
+	status = cairo_matrix_invert (&m);
-	source = &source_copy.base;
+	assert (status == CAIRO_STATUS_SUCCESS);
+	_copy_transformed_pattern (&source_copy.base, source, &m);
-    status = _cairo_surface_paint (wrapper->target, op, source, dev_clip);
+	source = &source_copy.base;
+    }
-  FINISH:
-    if (wrapper->has_extents)
+    status = _cairo_surface_paint (wrapper->target, op, source, dev_clip);
 	_cairo_clip_reset (&target_clip);
-    if (dev_clip != clip)
-	_cairo_clip_reset (dev_clip);
+    _cairo_clip_destroy (dev_clip);
     return status;
-}
+}
-cairo_status_t
-_cairo_surface_wrapper_mask (cairo_surface_wrapper_t *wrapper,
-			     cairo_operator_t	 op,
-			     const cairo_pattern_t *source,
-			     const cairo_pattern_t *mask,
-			     cairo_clip_t	    *clip)
-{
+cairo_status_t
-    cairo_status_t status;
-    cairo_clip_t clip_copy, *dev_clip = clip;
-    cairo_pattern_union_t source_copy;
-    cairo_pattern_union_t mask_copy;
-    cairo_clip_t target_clip;
-    if (unlikely (wrapper->target->status))
-	return wrapper->target->status;
+_cairo_surface_wrapper_mask (cairo_surface_wrapper_t *wrapper,
-    if (wrapper->has_extents) {
-	_cairo_clip_init_copy (&target_clip, clip);
+			     cairo_operator_t	 op,
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
-	if (unlikely (status))
-	    goto FINISH;
-	dev_clip = clip = &target_clip;
-    }
-    if (clip && clip->all_clipped) {
-	status = CAIRO_STATUS_SUCCESS;
-	goto FINISH;
-    }
-    if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
+			     const cairo_pattern_t *source,
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
+			     const cairo_pattern_t *mask,
 			     const cairo_clip_t	    *clip)
 	mask = &mask_copy.base;
+    }
-    status = _cairo_surface_mask (wrapper->target, op, source, mask, dev_clip);
-  FINISH:
-    if (wrapper->has_extents)
-	_cairo_clip_reset (&target_clip);
+    status = _cairo_surface_mask (wrapper->target, op, source, mask, dev_clip);
     if (dev_clip != clip)
-	_cairo_clip_reset (dev_clip);
+    _cairo_clip_destroy (dev_clip);
     return status;
+}
 cairo_status_t
 _cairo_surface_wrapper_stroke (cairo_surface_wrapper_t *wrapper,
 			       cairo_operator_t		 op,
 			       const cairo_pattern_t	*source,
-			       cairo_path_fixed_t	*path,
+			       const cairo_path_fixed_t	*path,
 			       const cairo_stroke_style_t	*stroke_style,
 			       const cairo_matrix_t		*ctm,
 			       const cairo_matrix_t		*ctm_inverse,
 			       double			 tolerance,
 			       cairo_antialias_t	 antialias,
-			       cairo_clip_t		*clip)
+			       const cairo_clip_t		*clip)
 {
     cairo_status_t status;
-    cairo_path_fixed_t path_copy, *dev_path = path;
+    cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path;
-    cairo_clip_t clip_copy, *dev_clip = clip;
+    cairo_clip_t *dev_clip;
-    cairo_matrix_t dev_ctm = *ctm;
-    cairo_matrix_t dev_ctm_inverse = *ctm_inverse;
+    cairo_matrix_t dev_ctm = *ctm;
-    cairo_pattern_union_t source_copy;
+    cairo_matrix_t dev_ctm_inverse = *ctm_inverse;
-    cairo_clip_t target_clip;
-    if (unlikely (wrapper->target->status))
+    cairo_pattern_union_t source_copy;
-	return wrapper->target->status;
-    if (wrapper->has_extents) {
-	_cairo_clip_init_copy (&target_clip, clip);
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
-	if (unlikely (status))
-	    goto FINISH;
+    if (unlikely (wrapper->target->status))
-	dev_clip = clip = &target_clip;
-    }
+	return wrapper->target->status;
-    if (clip && clip->all_clipped) {
-	status = CAIRO_STATUS_SUCCESS;
 	goto FINISH;
-    }
-    if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
+    dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
-    {
-	cairo_matrix_t m;
-	cairo_matrix_init_identity (&m);
+    if (_cairo_clip_is_all_clipped (dev_clip))
 	return CAIRO_INT_STATUS_NOTHING_TO_DO;
 	if (_cairo_surface_wrapper_needs_extents_transform (wrapper))
-	    cairo_matrix_translate (&m, -wrapper->extents.x, -wrapper->extents.y);
+    if (wrapper->needs_transform) {
 	cairo_matrix_t m;
-	if (_cairo_surface_wrapper_needs_device_transform (wrapper))
-	    cairo_matrix_multiply (&m, &wrapper->target->device_transform, &m);
-	status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
-	if (unlikely (status))
-	    goto FINISH;
-	_cairo_path_fixed_transform (&path_copy, &m);
 	dev_path = &path_copy;
 	_cairo_surface_wrapper_get_transform (wrapper, &m);
 	if (clip != NULL) {
-	    status = _cairo_clip_init_copy_transformed (&clip_copy, clip, &m);
+	status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
-	    if (unlikely (status))
+	if (unlikely (status))
-		goto FINISH;
+	    goto FINISH;
-	    dev_clip = &clip_copy;
-	}
-	cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m);
-	status = cairo_matrix_invert (&m);
-	assert (status == CAIRO_STATUS_SUCCESS);
 	_cairo_path_fixed_transform (&path_copy, &m);
-	cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse);
+	dev_path = &path_copy;
-	_copy_transformed_pattern (&source_copy.base, source, &m);
+	cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m);
 	source = &source_copy.base;
 	status = cairo_matrix_invert (&m);
-    else
+	assert (status == CAIRO_STATUS_SUCCESS);
-	if (clip != NULL) {
-	    dev_clip = &clip_copy;
-	    _cairo_clip_init_copy (&clip_copy, clip);
-	}
+	cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse);
 	_copy_transformed_pattern (&source_copy.base, source, &m);
-    status = _cairo_surface_stroke (wrapper->target, op, source,
+	source = &source_copy.base;
 				    dev_path, stroke_style,
 				    &dev_ctm, &dev_ctm_inverse,
-				    tolerance, antialias,
+    status = _cairo_surface_stroke (wrapper->target, op, source,
-				    dev_clip);
+				    dev_path, stroke_style,
 				    &dev_ctm, &dev_ctm_inverse,
- FINISH:
+				    tolerance, antialias,
-    if (dev_path != path)
+				    dev_clip);
 	_cairo_path_fixed_fini (dev_path);
-    if (wrapper->has_extents)
+ FINISH:
-	_cairo_clip_reset (&target_clip);
+    if (dev_path != path)
-    if (dev_clip != clip)
+	_cairo_path_fixed_fini (dev_path);
-	_cairo_clip_reset (dev_clip);
+    _cairo_clip_destroy (dev_clip);
     return status;
+}
 cairo_status_t
 _cairo_surface_wrapper_fill_stroke (cairo_surface_wrapper_t *wrapper,
 				    cairo_operator_t	     fill_op,
-				    const cairo_pattern_t   *fill_source,
-				    cairo_fill_rule_t	     fill_rule,
+				    const cairo_pattern_t   *fill_source,
-				    double		     fill_tolerance,
+				    cairo_fill_rule_t	     fill_rule,
+				    double		     fill_tolerance,
 				    cairo_antialias_t	     fill_antialias,
-				    cairo_path_fixed_t	    *path,
+				    const cairo_path_fixed_t*path,
-				    cairo_operator_t	     stroke_op,
-				    const cairo_pattern_t   *stroke_source,
+				    cairo_operator_t	     stroke_op,
-				    const cairo_stroke_style_t    *stroke_style,
+				    const cairo_pattern_t   *stroke_source,
-				    const cairo_matrix_t	    *stroke_ctm,
-				    const cairo_matrix_t	    *stroke_ctm_inverse,
+				    const cairo_stroke_style_t    *stroke_style,
-				    double		     stroke_tolerance,
+				    const cairo_matrix_t	    *stroke_ctm,
-				    cairo_antialias_t	     stroke_antialias,
-				    cairo_clip_t	    *clip)
+				    const cairo_matrix_t	    *stroke_ctm_inverse,
-{
-    cairo_status_t status;
-    cairo_path_fixed_t path_copy, *dev_path = path;
-    cairo_clip_t clip_copy, *dev_clip = clip;
+				    double		     stroke_tolerance,
-    cairo_matrix_t dev_ctm = *stroke_ctm;
-    cairo_matrix_t dev_ctm_inverse = *stroke_ctm_inverse;
-    cairo_pattern_union_t stroke_source_copy;
-    cairo_pattern_union_t fill_source_copy;
-    cairo_clip_t target_clip;
-    if (unlikely (wrapper->target->status))
-	return wrapper->target->status;
+				    cairo_antialias_t	     stroke_antialias,
-    if (wrapper->has_extents) {
-	_cairo_clip_init_copy (&target_clip, clip);
+				    const cairo_clip_t	    *clip)
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
-	if (unlikely (status))
-	    goto FINISH;
 	dev_clip = clip = &target_clip;
     cairo_status_t status;
     cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *)path;
-    if (clip && clip->all_clipped) {
+    cairo_matrix_t dev_ctm = *stroke_ctm;
-	status = CAIRO_STATUS_SUCCESS;
+    cairo_matrix_t dev_ctm_inverse = *stroke_ctm_inverse;
-	goto FINISH;
-    }
-    if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
-    {
-	cairo_matrix_t m;
-	cairo_matrix_init_identity (&m);
+    cairo_clip_t *dev_clip;
     cairo_pattern_union_t stroke_source_copy;
-	if (_cairo_surface_wrapper_needs_extents_transform (wrapper))
+    cairo_pattern_union_t fill_source_copy;
 	stroke_source = &stroke_source_copy.base;
 	_copy_transformed_pattern (&fill_source_copy.base, fill_source, &m);
 	fill_source = &fill_source_copy.base;
-    }
-    else
-    {
-	if (clip != NULL) {
-	    dev_clip = &clip_copy;
-	    _cairo_clip_init_copy (&clip_copy, clip);
-	}
+    }
     status = _cairo_surface_fill_stroke (wrapper->target,
 					 fill_op, fill_source, fill_rule,
 					 dev_clip);
   FINISH:
     if (dev_path != path)
-	_cairo_path_fixed_fini (dev_path);
-    if (wrapper->has_extents)
-	_cairo_clip_reset (&target_clip);
-    if (dev_clip != clip)
+	_cairo_path_fixed_fini (dev_path);
-	_cairo_clip_reset (dev_clip);
+    _cairo_clip_destroy (dev_clip);
     return status;
+}
 cairo_status_t
 _cairo_surface_wrapper_fill (cairo_surface_wrapper_t	*wrapper,
 			     cairo_operator_t	 op,
 			     const cairo_pattern_t *source,
-			     cairo_path_fixed_t	*path,
+			     const cairo_path_fixed_t	*path,
 			     cairo_fill_rule_t	 fill_rule,
 			     double		 tolerance,
 			     cairo_antialias_t	 antialias,
-			     cairo_clip_t	*clip)
+			     const cairo_clip_t	*clip)
 {
-    cairo_status_t status;
-    cairo_path_fixed_t path_copy, *dev_path = path;
+    cairo_status_t status;
-    cairo_clip_t clip_copy, *dev_clip = clip;
+    cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path;
     cairo_pattern_union_t source_copy;
-    cairo_clip_t target_clip;
+    cairo_clip_t *dev_clip;
-    if (unlikely (wrapper->target->status))
-	return wrapper->target->status;
-    if (wrapper->has_extents) {
-	_cairo_clip_init_copy (&target_clip, clip);
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
-	if (unlikely (status))
-	    goto FINISH;
+    if (unlikely (wrapper->target->status))
-	dev_clip = clip = &target_clip;
+	return wrapper->target->status;
-    }
-    if (clip && clip->all_clipped) {
-	status = CAIRO_STATUS_SUCCESS;
-	goto FINISH;
     dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
-    if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
+    if (_cairo_clip_is_all_clipped (dev_clip))
-    {
-	cairo_matrix_t m;
-	cairo_matrix_init_identity (&m);
 	return CAIRO_INT_STATUS_NOTHING_TO_DO;
 	if (_cairo_surface_wrapper_needs_extents_transform (wrapper))
-	    cairo_matrix_translate (&m, -wrapper->extents.x, -wrapper->extents.y);
+    if (wrapper->needs_transform) {
 	cairo_matrix_t m;
 	if (_cairo_surface_wrapper_needs_device_transform (wrapper))
-	    cairo_matrix_multiply (&m, &wrapper->target->device_transform, &m);
-	status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
-	if (unlikely (status))
-	    goto FINISH;
-	_cairo_path_fixed_transform (&path_copy, &m);
-	dev_path = &path_copy;
 	_cairo_surface_wrapper_get_transform (wrapper, &m);
 	if (clip != NULL) {
-	    status = _cairo_clip_init_copy_transformed (&clip_copy, clip, &m);
+	status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
-	    if (unlikely (status))
+	if (unlikely (status))
-		goto FINISH;
+	    goto FINISH;
-	    dev_clip = &clip_copy;
-	}
-	status = cairo_matrix_invert (&m);
-	assert (status == CAIRO_STATUS_SUCCESS);
 	_copy_transformed_pattern (&source_copy.base, source, &m);
-	source = &source_copy.base;
+	_cairo_path_fixed_transform (&path_copy, &m);
 	dev_path = &path_copy;
     else
 	status = cairo_matrix_invert (&m);
-	if (clip != NULL) {
+	assert (status == CAIRO_STATUS_SUCCESS);
 	    dev_clip = &clip_copy;
-	    _cairo_clip_init_copy (&clip_copy, clip);
-	}
-    }
+	_copy_transformed_pattern (&source_copy.base, source, &m);
-    status = _cairo_surface_fill (wrapper->target, op, source,
+	source = &source_copy.base;
 				  dev_path, fill_rule,
 				  tolerance, antialias,
-				  dev_clip);
+    status = _cairo_surface_fill (wrapper->target, op, source,
 				  dev_path, fill_rule,
- FINISH:
+				  tolerance, antialias,
-    if (dev_path != path)
+				  dev_clip);
 	_cairo_path_fixed_fini (dev_path);
-    if (wrapper->has_extents)
+ FINISH:
-	_cairo_clip_reset (&target_clip);
+    if (dev_path != path)
-    if (dev_clip != clip)
+	_cairo_path_fixed_fini (dev_path);
-	_cairo_clip_reset (dev_clip);
+    _cairo_clip_destroy (dev_clip);
     return status;
+}
 cairo_status_t
 _cairo_surface_wrapper_show_text_glyphs (cairo_surface_wrapper_t *wrapper,
 					 cairo_operator_t	     op,
+					 const cairo_pattern_t	    *source,
-					 const cairo_pattern_t	    *source,
+					 const char		    *utf8,
+					 int			     utf8_len,
-					 const char		    *utf8,
+					 const cairo_glyph_t	    *glyphs,
-					 int			     utf8_len,
+					 int			     num_glyphs,
-					 cairo_glyph_t		    *glyphs,
+					 const cairo_text_cluster_t *clusters,
-					 int			     num_glyphs,
+					 int			     num_clusters,
+					 cairo_text_cluster_flags_t  cluster_flags,
-					 const cairo_text_cluster_t *clusters,
+					 cairo_scaled_font_t	    *scaled_font,
-					 int			     num_clusters,
+					 const cairo_clip_t	    *clip)
-					 cairo_text_cluster_flags_t  cluster_flags,
-					 cairo_scaled_font_t	    *scaled_font,
+{
-					 cairo_clip_t		    *clip)
+    cairo_status_t status;
-{
-    cairo_status_t status;
-    cairo_clip_t clip_copy, *dev_clip = clip;
-    cairo_glyph_t *dev_glyphs = glyphs;
-    cairo_pattern_union_t source_copy;
-    cairo_clip_t target_clip;
+    cairo_clip_t *dev_clip;
-    if (unlikely (wrapper->target->status))
-	return wrapper->target->status;
-    if (glyphs == NULL || num_glyphs == 0)
-	return CAIRO_STATUS_SUCCESS;
-    if (wrapper->has_extents) {
+    cairo_glyph_t stack_glyphs [CAIRO_STACK_ARRAY_LENGTH(cairo_glyph_t)];
-	_cairo_clip_init_copy (&target_clip, clip);
+    cairo_glyph_t *dev_glyphs = stack_glyphs;
-	status = _cairo_clip_rectangle (&target_clip, &wrapper->extents);
-	if (unlikely (status))
-	    goto FINISH;
+    cairo_scaled_font_t *dev_scaled_font = scaled_font;
-	dev_clip = clip = &target_clip;
-    }
-    if (clip && clip->all_clipped) {
-	status = CAIRO_STATUS_SUCCESS;
+    cairo_pattern_union_t source_copy;
-	goto FINISH;
+    cairo_font_options_t options;
-    }
+    if (unlikely (wrapper->target->status))
+	return wrapper->target->status;
+    dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
+    if (_cairo_clip_is_all_clipped (dev_clip))
+	return CAIRO_INT_STATUS_NOTHING_TO_DO;
     if (_cairo_surface_wrapper_needs_device_transform (wrapper) ||
+    cairo_surface_get_font_options (wrapper->target, &options);
-	_cairo_surface_wrapper_needs_extents_transform (wrapper))
+    cairo_font_options_merge (&options, &scaled_font->options);
-    {
-	cairo_matrix_t m;
+    if (wrapper->needs_transform) {
-	int i;
+	cairo_matrix_t m;
 	int i;
-	cairo_matrix_init_identity (&m);
+	_cairo_surface_wrapper_get_transform (wrapper, &m);
-	if (_cairo_surface_wrapper_needs_extents_transform (wrapper))
+	if (! _cairo_matrix_is_translation (&wrapper->transform)) {
+	    cairo_matrix_t ctm;
-	    cairo_matrix_translate (&m, -wrapper->extents.x, -wrapper->extents.y);
+	    /* XXX No device-transform? A bug in the tangle of layers? */
 	    _cairo_matrix_multiply (&ctm,
-	if (_cairo_surface_wrapper_needs_device_transform (wrapper))
+				    &wrapper->transform,
-	    cairo_matrix_multiply (&m, &wrapper->target->device_transform, &m);
+				    &scaled_font->ctm);
 	    dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face,
+							&scaled_font->font_matrix,
+							&ctm, &options);
+	}
+	if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) {
+	    dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
+	    if (unlikely (dev_glyphs == NULL)) {
+		status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+		goto FINISH;
+	    }
+	}
+	for (i = 0; i < num_glyphs; i++) {
+	    dev_glyphs[i] = glyphs[i];
+	    cairo_matrix_transform_point (&m,
+					  &dev_glyphs[i].x,
+					  &dev_glyphs[i].y);
 	if (clip != NULL) {
-	    status = _cairo_clip_init_copy_transformed (&clip_copy, clip, &m);
-	    if (unlikely (status))
-		goto FINISH;
-	    dev_clip = &clip_copy;
+	status = cairo_matrix_invert (&m);
+	assert (status == CAIRO_STATUS_SUCCESS);
-	dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
+	_copy_transformed_pattern (&source_copy.base, source, &m);
-	if (dev_glyphs == NULL) {
+	source = &source_copy.base;
-	    status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+    } else {
-	    goto FINISH;
+	if (! cairo_font_options_equal (&options, &scaled_font->options)) {
 	    dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face,
+							&scaled_font->font_matrix,
-	for (i = 0; i < num_glyphs; i++) {
+							&scaled_font->ctm,
-	    dev_glyphs[i] = glyphs[i];
-	    cairo_matrix_transform_point (&m, &dev_glyphs[i].x, &dev_glyphs[i].y);
+							&options);
-	}
+	}
-	status = cairo_matrix_invert (&m);
-	assert (status == CAIRO_STATUS_SUCCESS);
-	_copy_transformed_pattern (&source_copy.base, source, &m);
+	/* show_text_glyphs is special because _cairo_surface_show_text_glyphs is allowed
+	 * to modify the glyph array that's passed in.  We must always
+	 * copy the array before handing it to the backend.
-	source = &source_copy.base;
+	 */
 	if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) {
-    else
+	    dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
 	    if (unlikely (dev_glyphs == NULL)) {
     } else {
 	return _cairo_surface_get_extents (wrapper->target, extents);
+    }
+}
+static cairo_bool_t
+_cairo_surface_wrapper_needs_device_transform (cairo_surface_wrapper_t *wrapper)
+{
+    return
+	(wrapper->has_extents && (wrapper->extents.x | wrapper->extents.y)) ||
+	! _cairo_matrix_is_identity (&wrapper->transform) ||
+	! _cairo_matrix_is_identity (&wrapper->target->device_transform);
+}
 void
-_cairo_surface_wrapper_set_extents (cairo_surface_wrapper_t *wrapper,
+_cairo_surface_wrapper_intersect_extents (cairo_surface_wrapper_t *wrapper,
-				    const cairo_rectangle_int_t *extents)
+					  const cairo_rectangle_int_t *extents)
 {
-    if (extents != NULL) {
+    if (! wrapper->has_extents) {
 	wrapper->extents = *extents;
+	wrapper->has_extents = TRUE;
+    } else
+	_cairo_rectangle_intersect (&wrapper->extents, extents);
+    wrapper->needs_transform =
+	_cairo_surface_wrapper_needs_device_transform (wrapper);
+}
+void
+_cairo_surface_wrapper_set_inverse_transform (cairo_surface_wrapper_t *wrapper,
+					      const cairo_matrix_t *transform)
+{
+    cairo_status_t status;
+    if (transform == NULL || _cairo_matrix_is_identity (transform)) {
+	cairo_matrix_init_identity (&wrapper->transform);
+	wrapper->needs_transform =
-	wrapper->has_extents = TRUE;
+	    _cairo_surface_wrapper_needs_device_transform (wrapper);
+    } else {
+	wrapper->transform = *transform;
+	status = cairo_matrix_invert (&wrapper->transform);
+	/* should always be invertible unless given pathological input */
+	assert (status == CAIRO_STATUS_SUCCESS);
-    } else {
-	wrapper->has_extents = FALSE;
+	wrapper->needs_transform = TRUE;
+    }
+}
+void
+_cairo_surface_wrapper_set_clip (cairo_surface_wrapper_t *wrapper,
+				 const cairo_clip_t *clip)
+{
+    wrapper->clip = clip;
+}
 void
 _cairo_surface_wrapper_get_font_options (cairo_surface_wrapper_t    *wrapper,
 					 cairo_font_options_t	    *options)
+{
     cairo_surface_get_font_options (wrapper->target, options);
+}
+cairo_surface_t *
-cairo_surface_t *
+_cairo_surface_wrapper_snapshot (cairo_surface_wrapper_t *wrapper)
+{
+    if (wrapper->target->backend->snapshot)
-_cairo_surface_wrapper_snapshot (cairo_surface_wrapper_t *wrapper)
+	return wrapper->target->backend->snapshot (wrapper->target);
-    return _cairo_surface_snapshot (wrapper->target);
+    return NULL;
+}
 void
 _cairo_surface_wrapper_init (cairo_surface_wrapper_t *wrapper,
 			     cairo_surface_t *target)
+{
     wrapper->target = cairo_surface_reference (target);
+    cairo_matrix_init_identity (&wrapper->transform);
     wrapper->has_extents = FALSE;
+    wrapper->extents.x = wrapper->extents.y = 0;
+    wrapper->clip = NULL;
+    wrapper->needs_transform = FALSE;
+    if (target) {
+	wrapper->needs_transform =
+	    ! _cairo_matrix_is_identity (&target->device_transform);
+    }
+}
 void
 _cairo_surface_wrapper_fini (cairo_surface_wrapper_t *wrapper)
+{
     cairo_surface_destroy (wrapper->target);
+}
+cairo_bool_t
+_cairo_surface_wrapper_get_target_extents (cairo_surface_wrapper_t *wrapper,
+					   cairo_rectangle_int_t *extents)
+{
+    cairo_rectangle_int_t clip;
+    cairo_bool_t has_clip;
+    has_clip = _cairo_surface_get_extents (wrapper->target, &clip);
+    if (wrapper->clip) {
+	if (has_clip) {
+	    if (! _cairo_rectangle_intersect (&clip,
+					      _cairo_clip_get_extents (wrapper->clip)))
+		return FALSE;
+	} else {
+	    has_clip = TRUE;
+	    clip = *_cairo_clip_get_extents (wrapper->clip);
+	}
+    }
+    if (has_clip && wrapper->needs_transform) {
+	cairo_matrix_t m;
+	double x1, y1, x2, y2;
+	_cairo_surface_wrapper_get_inverse_transform (wrapper, &m);
+	x1 = clip.x;
+	y1 = clip.y;
+	x2 = clip.x + clip.width;
+	y2 = clip.y + clip.height;
+	_cairo_matrix_transform_bounding_box (&m, &x1, &y1, &x2, &y2, NULL);
+	clip.x = floor (x1);
+	clip.y = floor (y1);
+	clip.width  = ceil (x2) - clip.x;
+	clip.height = ceil (y2) - clip.y;
+    }
+    if (has_clip) {
+	if (wrapper->has_extents) {
+	    *extents = wrapper->extents;
+	    return _cairo_rectangle_intersect (extents, &clip);
+	} else {
+	    *extents = clip;
+	    return TRUE;
+	}
+    } else if (wrapper->has_extents) {
+	*extents = wrapper->extents;
+	return TRUE;
+    } else {
+	_cairo_unbounded_rectangle_init (extents);
+	return TRUE;
+    }

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(root)/programs/develop/libraries/cairo/src/cairo-surface-wrapper.c – Rev 1892 → 3959