pixman/pixman-image.c - third_party/pixman - Git at Google

 /*
  * Copyright © 2000 SuSE, Inc.
  * Copyright © 2007 Red Hat, Inc.
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
  * the above copyright notice appear in all copies and that both that
  * copyright notice and this permission notice appear in supporting
  * documentation, and that the name of SuSE not be used in advertising or
  * publicity pertaining to distribution of the software without specific,
  * written prior permission.  SuSE makes no representations about the
  * suitability of this software for any purpose.  It is provided "as is"
  * without express or implied warranty.
  *
  * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif

 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>

 #include "pixman-private.h"
 #include "pixman-combine32.h"

 pixman_bool_t
 _pixman_init_gradient (gradient_t *                  gradient,
                        const pixman_gradient_stop_t *stops,
                        int                           n_stops)
 {
     return_val_if_fail (n_stops > 0, FALSE);

     gradient->stops = pixman_malloc_ab (n_stops, sizeof (pixman_gradient_stop_t));
     if (!gradient->stops)
 	return FALSE;

     memcpy (gradient->stops, stops, n_stops * sizeof (pixman_gradient_stop_t));

     gradient->n_stops = n_stops;

     gradient->stop_range = 0xffff;
     gradient->color_table = NULL;
     gradient->color_table_size = 0;
     gradient->common.class = SOURCE_IMAGE_CLASS_UNKNOWN;

     return TRUE;
 }

 /*
  * By default, just evaluate the image at 32bpp and expand.  Individual image
  * types can plug in a better scanline getter if they want to. For example
  * we  could produce smoother gradients by evaluating them at higher color
  * depth, but that's a project for the future.
  */
 void
 _pixman_image_get_scanline_generic_64 (pixman_image_t * image,
                                        int              x,
                                        int              y,
                                        int              width,
                                        uint32_t *       buffer,
                                        const uint32_t * mask,
                                        uint32_t         mask_bits)
 {
     uint32_t *mask8 = NULL;

     /* Contract the mask image, if one exists, so that the 32-bit fetch
      * function can use it.
      */
     if (mask)
     {
 	mask8 = pixman_malloc_ab (width, sizeof(uint32_t));
 	if (!mask8)
 	    return;

 	pixman_contract (mask8, (uint64_t *)mask, width);
     }

     /* Fetch the source image into the first half of buffer. */
     _pixman_image_get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8,
                                    mask_bits);

     /* Expand from 32bpp to 64bpp in place. */
     pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width);

     free (mask8);
 }

 pixman_image_t *
 _pixman_image_allocate (void)
 {
     pixman_image_t *image = malloc (sizeof (pixman_image_t));

     if (image)
     {
 	image_common_t *common = &image->common;

 	pixman_region32_init (&common->clip_region);

 	common->have_clip_region = FALSE;
 	common->clip_sources = FALSE;
 	common->transform = NULL;
 	common->repeat = PIXMAN_REPEAT_NONE;
 	common->filter = PIXMAN_FILTER_NEAREST;
 	common->filter_params = NULL;
 	common->n_filter_params = 0;
 	common->alpha_map = NULL;
 	common->component_alpha = FALSE;
 	common->ref_count = 1;
 	common->classify = NULL;
 	common->client_clip = FALSE;
 	common->destroy_func = NULL;
 	common->destroy_data = NULL;
 	common->need_workaround = FALSE;
 	common->dirty = TRUE;
     }

     return image;
 }

 source_image_class_t
 _pixman_image_classify (pixman_image_t *image,
                         int             x,
                         int             y,
                         int             width,
                         int             height)
 {
     if (image->common.classify)
 	return image->common.classify (image, x, y, width, height);
     else
 	return SOURCE_IMAGE_CLASS_UNKNOWN;
 }

 void
 _pixman_image_get_scanline_32 (pixman_image_t *image,
                                int             x,
                                int             y,
                                int             width,
                                uint32_t *      buffer,
                                const uint32_t *mask,
                                uint32_t        mask_bits)
 {
     image->common.get_scanline_32 (image, x, y, width, buffer, mask, mask_bits);
 }

 /* Even thought the type of buffer is uint32_t *, the function actually expects
  * a uint64_t *buffer.
  */
 void
 _pixman_image_get_scanline_64 (pixman_image_t *image,
                                int             x,
                                int             y,
                                int             width,
                                uint32_t *      buffer,
                                const uint32_t *unused,
                                uint32_t        unused2)
 {
     image->common.get_scanline_64 (image, x, y, width, buffer, unused, unused2);
 }

 static void
 image_property_changed (pixman_image_t *image)
 {
     image->common.dirty = TRUE;
 }

 /* Ref Counting */
 PIXMAN_EXPORT pixman_image_t *
 pixman_image_ref (pixman_image_t *image)
 {
     image->common.ref_count++;

     return image;
 }

 /* returns TRUE when the image is freed */
 PIXMAN_EXPORT pixman_bool_t
 pixman_image_unref (pixman_image_t *image)
 {
     image_common_t *common = (image_common_t *)image;

     common->ref_count--;

     if (common->ref_count == 0)
     {
 	if (image->common.destroy_func)
 	    image->common.destroy_func (image, image->common.destroy_data);

 	pixman_region32_fini (&common->clip_region);

 	if (common->transform)
 	    free (common->transform);

 	if (common->filter_params)
 	    free (common->filter_params);

 	if (common->alpha_map)
 	    pixman_image_unref ((pixman_image_t *)common->alpha_map);

 	if (image->type == LINEAR ||
 	    image->type == RADIAL ||
 	    image->type == CONICAL)
 	{
 	    if (image->gradient.stops)
 		free (image->gradient.stops);
 	}

 	if (image->type == BITS && image->bits.free_me)
 	    free (image->bits.free_me);

 	free (image);

 	return TRUE;
     }

     return FALSE;
 }

 PIXMAN_EXPORT void
 pixman_image_set_destroy_function (pixman_image_t *            image,
                                    pixman_image_destroy_func_t func,
                                    void *                      data)
 {
     image->common.destroy_func = func;
     image->common.destroy_data = data;
 }

 void
 _pixman_image_reset_clip_region (pixman_image_t *image)
 {
     image->common.have_clip_region = FALSE;
 }

 void
 _pixman_image_validate (pixman_image_t *image)
 {
     if (image->common.dirty)
     {
 	image->common.property_changed (image);
 	image->common.dirty = FALSE;
     }

     if (image->common.alpha_map)
 	_pixman_image_validate (image->common.alpha_map);
 }

 PIXMAN_EXPORT pixman_bool_t
 pixman_image_set_clip_region32 (pixman_image_t *   image,
                                 pixman_region32_t *region)
 {
     image_common_t *common = (image_common_t *)image;
     pixman_bool_t result;

     if (region)
     {
 	if ((result = pixman_region32_copy (&common->clip_region, region)))
 	    image->common.have_clip_region = TRUE;
     }
     else
     {
 	_pixman_image_reset_clip_region (image);

 	result = TRUE;
     }

     image_property_changed (image);

     return result;
 }

 PIXMAN_EXPORT pixman_bool_t
 pixman_image_set_clip_region (pixman_image_t *   image,
                               pixman_region16_t *region)
 {
     image_common_t *common = (image_common_t *)image;
     pixman_bool_t result;

     if (region)
     {
 	if ((result = pixman_region32_copy_from_region16 (&common->clip_region, region)))
 	    image->common.have_clip_region = TRUE;
     }
     else
     {
 	_pixman_image_reset_clip_region (image);

 	result = TRUE;
     }

     image_property_changed (image);

     return result;
 }

 PIXMAN_EXPORT void
 pixman_image_set_has_client_clip (pixman_image_t *image,
                                   pixman_bool_t   client_clip)
 {
     image->common.client_clip = client_clip;
 }

 PIXMAN_EXPORT pixman_bool_t
 pixman_image_set_transform (pixman_image_t *          image,
                             const pixman_transform_t *transform)
 {
     static const pixman_transform_t id =
     {
 	{ { pixman_fixed_1, 0, 0 },
 	  { 0, pixman_fixed_1, 0 },
 	  { 0, 0, pixman_fixed_1 } }
     };

     image_common_t *common = (image_common_t *)image;
     pixman_bool_t result;

     if (common->transform == transform)
 	return TRUE;

     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
     {
 	free (common->transform);
 	common->transform = NULL;
 	result = TRUE;

 	goto out;
     }

     if (common->transform == NULL)
 	common->transform = malloc (sizeof (pixman_transform_t));

     if (common->transform == NULL)
     {
 	result = FALSE;

 	goto out;
     }

     memcpy (common->transform, transform, sizeof(pixman_transform_t));

     result = TRUE;

 out:
     image_property_changed (image);

     return result;
 }

 PIXMAN_EXPORT void
 pixman_image_set_repeat (pixman_image_t *image,
                          pixman_repeat_t repeat)
 {
     image->common.repeat = repeat;

     image_property_changed (image);
 }

 PIXMAN_EXPORT pixman_bool_t
 pixman_image_set_filter (pixman_image_t *      image,
                          pixman_filter_t       filter,
                          const pixman_fixed_t *params,
                          int                   n_params)
 {
     image_common_t *common = (image_common_t *)image;
     pixman_fixed_t *new_params;

     if (params == common->filter_params && filter == common->filter)
 	return TRUE;

     new_params = NULL;
     if (params)
     {
 	new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 	if (!new_params)
 	    return FALSE;

 	memcpy (new_params,
 	        params, n_params * sizeof (pixman_fixed_t));
     }

     common->filter = filter;

     if (common->filter_params)
 	free (common->filter_params);

     common->filter_params = new_params;
     common->n_filter_params = n_params;

     image_property_changed (image);
     return TRUE;
 }

 PIXMAN_EXPORT void
 pixman_image_set_source_clipping (pixman_image_t *image,
                                   pixman_bool_t   clip_sources)
 {
     image->common.clip_sources = clip_sources;

     image_property_changed (image);
 }

 /* Unlike all the other property setters, this function does not
  * copy the content of indexed. Doing this copying is simply
  * way, way too expensive.
  */
 PIXMAN_EXPORT void
 pixman_image_set_indexed (pixman_image_t *        image,
                           const pixman_indexed_t *indexed)
 {
     bits_image_t *bits = (bits_image_t *)image;

     bits->indexed = indexed;

     image_property_changed (image);
 }

 PIXMAN_EXPORT void
 pixman_image_set_alpha_map (pixman_image_t *image,
                             pixman_image_t *alpha_map,
                             int16_t         x,
                             int16_t         y)
 {
     image_common_t *common = (image_common_t *)image;

     return_if_fail (!alpha_map || alpha_map->type == BITS);

     if (common->alpha_map != (bits_image_t *)alpha_map)
     {
 	if (common->alpha_map)
 	    pixman_image_unref ((pixman_image_t *)common->alpha_map);

 	if (alpha_map)
 	    common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 	else
 	    common->alpha_map = NULL;
     }

     common->alpha_origin_x = x;
     common->alpha_origin_y = y;

     image_property_changed (image);
 }

 PIXMAN_EXPORT void
 pixman_image_set_component_alpha   (pixman_image_t *image,
                                     pixman_bool_t   component_alpha)
 {
     image->common.component_alpha = component_alpha;

     image_property_changed (image);
 }

 PIXMAN_EXPORT void
 pixman_image_set_accessors (pixman_image_t *           image,
                             pixman_read_memory_func_t  read_func,
                             pixman_write_memory_func_t write_func)
 {
     return_if_fail (image != NULL);

     if (image->type == BITS)
     {
 	image->bits.read_func = read_func;
 	image->bits.write_func = write_func;

 	image_property_changed (image);
     }
 }

 PIXMAN_EXPORT uint32_t *
 pixman_image_get_data (pixman_image_t *image)
 {
     if (image->type == BITS)
 	return image->bits.bits;

     return NULL;
 }

 PIXMAN_EXPORT int
 pixman_image_get_width (pixman_image_t *image)
 {
     if (image->type == BITS)
 	return image->bits.width;

     return 0;
 }

 PIXMAN_EXPORT int
 pixman_image_get_height (pixman_image_t *image)
 {
     if (image->type == BITS)
 	return image->bits.height;

     return 0;
 }

 PIXMAN_EXPORT int
 pixman_image_get_stride (pixman_image_t *image)
 {
     if (image->type == BITS)
 	return image->bits.rowstride * (int) sizeof (uint32_t);

     return 0;
 }

 PIXMAN_EXPORT int
 pixman_image_get_depth (pixman_image_t *image)
 {
     if (image->type == BITS)
 	return PIXMAN_FORMAT_DEPTH (image->bits.format);

     return 0;
 }

 pixman_bool_t
 _pixman_image_is_solid (pixman_image_t *image)
 {
     if (image->type == SOLID)
 	return TRUE;

     if (image->type != BITS     ||
         image->bits.width != 1  ||
         image->bits.height != 1)
     {
 	return FALSE;
     }

     if (image->common.repeat == PIXMAN_REPEAT_NONE)
 	return FALSE;

     return TRUE;
 }

 uint32_t
 _pixman_image_get_solid (pixman_image_t *     image,
                          pixman_format_code_t format)
 {
     uint32_t result;

     _pixman_image_get_scanline_32 (image, 0, 0, 1, &result, NULL, 0);

     /* If necessary, convert RGB <--> BGR. */
     if (PIXMAN_FORMAT_TYPE (format) != PIXMAN_TYPE_ARGB)
     {
 	result = (((result & 0xff000000) >>  0) |
 	          ((result & 0x00ff0000) >> 16) |
 	          ((result & 0x0000ff00) >>  0) |
 	          ((result & 0x000000ff) << 16));
     }

     return result;
 }

 pixman_bool_t
 _pixman_image_is_opaque (pixman_image_t *image)
 {
     int i;

     if (image->common.alpha_map)
 	return FALSE;

     switch (image->type)
     {
     case BITS:
 	if (image->common.repeat == PIXMAN_REPEAT_NONE)
 	    return FALSE;

 	if (PIXMAN_FORMAT_A (image->bits.format))
 	    return FALSE;
 	break;

     case LINEAR:
     case RADIAL:
 	if (image->common.repeat == PIXMAN_REPEAT_NONE)
 	    return FALSE;

 	for (i = 0; i < image->gradient.n_stops; ++i)
 	{
 	    if (image->gradient.stops[i].color.alpha != 0xffff)
 		return FALSE;
 	}
 	break;

     case CONICAL:
 	/* Conical gradients always have a transparent border */
 	return FALSE;
 	break;

     case SOLID:
 	if (ALPHA_8 (image->solid.color) != 0xff)
 	    return FALSE;
 	break;
     }

     /* Convolution filters can introduce translucency if the sum of the
      * weights is lower than 1.
      */
     if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
 	return FALSE;

     return TRUE;
 }
	/*
	* Copyright © 2000 SuSE, Inc.
	* Copyright © 2007 Red Hat, Inc.
	*
	* Permission to use, copy, modify, distribute, and sell this software and its
	* documentation for any purpose is hereby granted without fee, provided that
	* the above copyright notice appear in all copies and that both that
	* copyright notice and this permission notice appear in supporting
	* documentation, and that the name of SuSE not be used in advertising or
	* publicity pertaining to distribution of the software without specific,
	* written prior permission. SuSE makes no representations about the
	* suitability of this software for any purpose. It is provided "as is"
	* without express or implied warranty.
	*
	* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
	* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#ifdef HAVE_CONFIG_H
	#include <config.h>
	#endif

	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <assert.h>

	#include "pixman-private.h"
	#include "pixman-combine32.h"

	pixman_bool_t
	_pixman_init_gradient (gradient_t * gradient,
	const pixman_gradient_stop_t *stops,
	int n_stops)
	{
	return_val_if_fail (n_stops > 0, FALSE);

	gradient->stops = pixman_malloc_ab (n_stops, sizeof (pixman_gradient_stop_t));
	if (!gradient->stops)
	return FALSE;

	memcpy (gradient->stops, stops, n_stops * sizeof (pixman_gradient_stop_t));

	gradient->n_stops = n_stops;

	gradient->stop_range = 0xffff;
	gradient->color_table = NULL;
	gradient->color_table_size = 0;
	gradient->common.class = SOURCE_IMAGE_CLASS_UNKNOWN;

	return TRUE;
	}

	/*
	* By default, just evaluate the image at 32bpp and expand. Individual image
	* types can plug in a better scanline getter if they want to. For example
	* we could produce smoother gradients by evaluating them at higher color
	* depth, but that's a project for the future.
	*/
	void
	_pixman_image_get_scanline_generic_64 (pixman_image_t * image,
	int x,
	int y,
	int width,
	uint32_t * buffer,
	const uint32_t * mask,
	uint32_t mask_bits)
	{
	uint32_t *mask8 = NULL;

	/* Contract the mask image, if one exists, so that the 32-bit fetch
	* function can use it.
	*/
	if (mask)
	{
	mask8 = pixman_malloc_ab (width, sizeof(uint32_t));
	if (!mask8)
	return;

	pixman_contract (mask8, (uint64_t *)mask, width);
	}

	/* Fetch the source image into the first half of buffer. */
	_pixman_image_get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8,
	mask_bits);

	/* Expand from 32bpp to 64bpp in place. */
	pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width);

	free (mask8);
	}

	pixman_image_t *
	_pixman_image_allocate (void)
	{
	pixman_image_t *image = malloc (sizeof (pixman_image_t));

	if (image)
	{
	image_common_t *common = &image->common;

	pixman_region32_init (&common->clip_region);

	common->have_clip_region = FALSE;
	common->clip_sources = FALSE;
	common->transform = NULL;
	common->repeat = PIXMAN_REPEAT_NONE;
	common->filter = PIXMAN_FILTER_NEAREST;
	common->filter_params = NULL;
	common->n_filter_params = 0;
	common->alpha_map = NULL;
	common->component_alpha = FALSE;
	common->ref_count = 1;
	common->classify = NULL;
	common->client_clip = FALSE;
	common->destroy_func = NULL;
	common->destroy_data = NULL;
	common->need_workaround = FALSE;
	common->dirty = TRUE;
	}

	return image;
	}

	source_image_class_t
	_pixman_image_classify (pixman_image_t *image,
	int x,
	int y,
	int width,
	int height)
	{
	if (image->common.classify)
	return image->common.classify (image, x, y, width, height);
	else
	return SOURCE_IMAGE_CLASS_UNKNOWN;
	}

	void
	_pixman_image_get_scanline_32 (pixman_image_t *image,
	int x,
	int y,
	int width,
	uint32_t * buffer,
	const uint32_t *mask,
	uint32_t mask_bits)
	{
	image->common.get_scanline_32 (image, x, y, width, buffer, mask, mask_bits);
	}

	/* Even thought the type of buffer is uint32_t *, the function actually expects
	* a uint64_t *buffer.
	*/
	void
	_pixman_image_get_scanline_64 (pixman_image_t *image,
	int x,
	int y,
	int width,
	uint32_t * buffer,
	const uint32_t *unused,
	uint32_t unused2)
	{
	image->common.get_scanline_64 (image, x, y, width, buffer, unused, unused2);
	}

	static void
	image_property_changed (pixman_image_t *image)
	{
	image->common.dirty = TRUE;
	}

	/* Ref Counting */
	PIXMAN_EXPORT pixman_image_t *
	pixman_image_ref (pixman_image_t *image)
	{
	image->common.ref_count++;

	return image;
	}

	/* returns TRUE when the image is freed */
	PIXMAN_EXPORT pixman_bool_t
	pixman_image_unref (pixman_image_t *image)
	{
	image_common_t common = (image_common_t )image;

	common->ref_count--;

	if (common->ref_count == 0)
	{
	if (image->common.destroy_func)
	image->common.destroy_func (image, image->common.destroy_data);

	pixman_region32_fini (&common->clip_region);

	if (common->transform)
	free (common->transform);

	if (common->filter_params)
	free (common->filter_params);

	if (common->alpha_map)
	pixman_image_unref ((pixman_image_t *)common->alpha_map);

	if (image->type == LINEAR \|\|
	image->type == RADIAL \|\|
	image->type == CONICAL)
	{
	if (image->gradient.stops)
	free (image->gradient.stops);
	}

	if (image->type == BITS && image->bits.free_me)
	free (image->bits.free_me);

	free (image);

	return TRUE;
	}

	return FALSE;
	}

	PIXMAN_EXPORT void
	pixman_image_set_destroy_function (pixman_image_t * image,
	pixman_image_destroy_func_t func,
	void * data)
	{
	image->common.destroy_func = func;
	image->common.destroy_data = data;
	}

	void
	_pixman_image_reset_clip_region (pixman_image_t *image)
	{
	image->common.have_clip_region = FALSE;
	}

	void
	_pixman_image_validate (pixman_image_t *image)
	{
	if (image->common.dirty)
	{
	image->common.property_changed (image);
	image->common.dirty = FALSE;
	}

	if (image->common.alpha_map)
	_pixman_image_validate (image->common.alpha_map);
	}

	PIXMAN_EXPORT pixman_bool_t
	pixman_image_set_clip_region32 (pixman_image_t * image,
	pixman_region32_t *region)
	{
	image_common_t common = (image_common_t )image;
	pixman_bool_t result;

	if (region)
	{
	if ((result = pixman_region32_copy (&common->clip_region, region)))
	image->common.have_clip_region = TRUE;
	}
	else
	{
	_pixman_image_reset_clip_region (image);

	result = TRUE;
	}

	image_property_changed (image);

	return result;
	}

	PIXMAN_EXPORT pixman_bool_t
	pixman_image_set_clip_region (pixman_image_t * image,
	pixman_region16_t *region)
	{
	image_common_t common = (image_common_t )image;
	pixman_bool_t result;

	if (region)
	{
	if ((result = pixman_region32_copy_from_region16 (&common->clip_region, region)))
	image->common.have_clip_region = TRUE;
	}
	else
	{
	_pixman_image_reset_clip_region (image);

	result = TRUE;
	}

	image_property_changed (image);

	return result;
	}

	PIXMAN_EXPORT void
	pixman_image_set_has_client_clip (pixman_image_t *image,
	pixman_bool_t client_clip)
	{
	image->common.client_clip = client_clip;
	}

	PIXMAN_EXPORT pixman_bool_t
	pixman_image_set_transform (pixman_image_t * image,
	const pixman_transform_t *transform)
	{
	static const pixman_transform_t id =
	{
	{ { pixman_fixed_1, 0, 0 },
	{ 0, pixman_fixed_1, 0 },
	{ 0, 0, pixman_fixed_1 } }
	};

	image_common_t common = (image_common_t )image;
	pixman_bool_t result;

	if (common->transform == transform)
	return TRUE;

	if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
	{
	free (common->transform);
	common->transform = NULL;
	result = TRUE;

	goto out;
	}

	if (common->transform == NULL)
	common->transform = malloc (sizeof (pixman_transform_t));

	if (common->transform == NULL)
	{
	result = FALSE;

	goto out;
	}

	memcpy (common->transform, transform, sizeof(pixman_transform_t));

	result = TRUE;

	out:
	image_property_changed (image);

	return result;
	}

	PIXMAN_EXPORT void
	pixman_image_set_repeat (pixman_image_t *image,
	pixman_repeat_t repeat)
	{
	image->common.repeat = repeat;

	image_property_changed (image);
	}

	PIXMAN_EXPORT pixman_bool_t
	pixman_image_set_filter (pixman_image_t * image,
	pixman_filter_t filter,
	const pixman_fixed_t *params,
	int n_params)
	{
	image_common_t common = (image_common_t )image;
	pixman_fixed_t *new_params;

	if (params == common->filter_params && filter == common->filter)
	return TRUE;

	new_params = NULL;
	if (params)
	{
	new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
	if (!new_params)
	return FALSE;

	memcpy (new_params,
	params, n_params * sizeof (pixman_fixed_t));
	}

	common->filter = filter;

	if (common->filter_params)
	free (common->filter_params);

	common->filter_params = new_params;
	common->n_filter_params = n_params;

	image_property_changed (image);
	return TRUE;
	}

	PIXMAN_EXPORT void
	pixman_image_set_source_clipping (pixman_image_t *image,
	pixman_bool_t clip_sources)
	{
	image->common.clip_sources = clip_sources;

	image_property_changed (image);
	}

	/* Unlike all the other property setters, this function does not
	* copy the content of indexed. Doing this copying is simply
	* way, way too expensive.
	*/
	PIXMAN_EXPORT void
	pixman_image_set_indexed (pixman_image_t * image,
	const pixman_indexed_t *indexed)
	{
	bits_image_t bits = (bits_image_t )image;

	bits->indexed = indexed;

	image_property_changed (image);
	}

	PIXMAN_EXPORT void
	pixman_image_set_alpha_map (pixman_image_t *image,
	pixman_image_t *alpha_map,
	int16_t x,
	int16_t y)
	{
	image_common_t common = (image_common_t )image;

	return_if_fail (!alpha_map \|\| alpha_map->type == BITS);

	if (common->alpha_map != (bits_image_t *)alpha_map)
	{
	if (common->alpha_map)
	pixman_image_unref ((pixman_image_t *)common->alpha_map);

	if (alpha_map)
	common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
	else
	common->alpha_map = NULL;
	}

	common->alpha_origin_x = x;
	common->alpha_origin_y = y;

	image_property_changed (image);
	}

	PIXMAN_EXPORT void
	pixman_image_set_component_alpha (pixman_image_t *image,
	pixman_bool_t component_alpha)
	{
	image->common.component_alpha = component_alpha;

	image_property_changed (image);
	}

	PIXMAN_EXPORT void
	pixman_image_set_accessors (pixman_image_t * image,
	pixman_read_memory_func_t read_func,
	pixman_write_memory_func_t write_func)
	{
	return_if_fail (image != NULL);

	if (image->type == BITS)
	{
	image->bits.read_func = read_func;
	image->bits.write_func = write_func;

	image_property_changed (image);
	}
	}

	PIXMAN_EXPORT uint32_t *
	pixman_image_get_data (pixman_image_t *image)
	{
	if (image->type == BITS)
	return image->bits.bits;

	return NULL;
	}

	PIXMAN_EXPORT int
	pixman_image_get_width (pixman_image_t *image)
	{
	if (image->type == BITS)
	return image->bits.width;

	return 0;
	}

	PIXMAN_EXPORT int
	pixman_image_get_height (pixman_image_t *image)
	{
	if (image->type == BITS)
	return image->bits.height;

	return 0;
	}

	PIXMAN_EXPORT int
	pixman_image_get_stride (pixman_image_t *image)
	{
	if (image->type == BITS)
	return image->bits.rowstride * (int) sizeof (uint32_t);

	return 0;
	}

	PIXMAN_EXPORT int
	pixman_image_get_depth (pixman_image_t *image)
	{
	if (image->type == BITS)
	return PIXMAN_FORMAT_DEPTH (image->bits.format);

	return 0;
	}

	pixman_bool_t
	_pixman_image_is_solid (pixman_image_t *image)
	{
	if (image->type == SOLID)
	return TRUE;

	if (image->type != BITS \|\|
	image->bits.width != 1 \|\|
	image->bits.height != 1)
	{
	return FALSE;
	}

	if (image->common.repeat == PIXMAN_REPEAT_NONE)
	return FALSE;

	return TRUE;
	}

	uint32_t
	_pixman_image_get_solid (pixman_image_t * image,
	pixman_format_code_t format)
	{
	uint32_t result;

	_pixman_image_get_scanline_32 (image, 0, 0, 1, &result, NULL, 0);

	/* If necessary, convert RGB <--> BGR. */
	if (PIXMAN_FORMAT_TYPE (format) != PIXMAN_TYPE_ARGB)
	{
	result = (((result & 0xff000000) >> 0) \|
	((result & 0x00ff0000) >> 16) \|
	((result & 0x0000ff00) >> 0) \|
	((result & 0x000000ff) << 16));
	}

	return result;
	}

	pixman_bool_t
	_pixman_image_is_opaque (pixman_image_t *image)
	{
	int i;

	if (image->common.alpha_map)
	return FALSE;

	switch (image->type)
	{
	case BITS:
	if (image->common.repeat == PIXMAN_REPEAT_NONE)
	return FALSE;

	if (PIXMAN_FORMAT_A (image->bits.format))
	return FALSE;
	break;

	case LINEAR:
	case RADIAL:
	if (image->common.repeat == PIXMAN_REPEAT_NONE)
	return FALSE;

	for (i = 0; i < image->gradient.n_stops; ++i)
	{
	if (image->gradient.stops[i].color.alpha != 0xffff)
	return FALSE;
	}
	break;

	case CONICAL:
	/* Conical gradients always have a transparent border */
	return FALSE;
	break;

	case SOLID:
	if (ALPHA_8 (image->solid.color) != 0xff)
	return FALSE;
	break;
	}

	/* Convolution filters can introduce translucency if the sum of the
	* weights is lower than 1.
	*/
	if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
	return FALSE;

	return TRUE;
	}