add pixman and libpngraylib

1 files changed, 676 insertions, 0 deletions

diff --git a/libs/pixman-0.40.0/pixman/pixman-glyph.c b/libs/pixman-0.40.0/pixman/pixman-glyph.c
new file mode 100644
index 0000000..96a349a
--- /dev/null
+++ b/libs/pixman-0.40.0/pixman/pixman-glyph.c
@@ -0,0 +1,676 @@
+/*
+ * Copyright 2010, 2012, Soren Sandmann <sandmann@cs.au.dk>
+ * Copyright 2010, 2011, 2012, Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Soren Sandmann <sandmann@cs.au.dk>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "pixman-private.h"
+
+#include <stdlib.h>
+
+typedef struct glyph_metrics_t glyph_metrics_t;
+typedef struct glyph_t glyph_t;
+
+#define TOMBSTONE ((glyph_t *)0x1)
+
+/* XXX: These numbers are arbitrary---we've never done any measurements.
+ */
+#define N_GLYPHS_HIGH_WATER  (16384)
+#define N_GLYPHS_LOW_WATER   (8192)
+#define HASH_SIZE (2 * N_GLYPHS_HIGH_WATER)
+#define HASH_MASK (HASH_SIZE - 1)
+
+struct glyph_t
+{
+    void *		font_key;
+    void *		glyph_key;
+    int			origin_x;
+    int			origin_y;
+    pixman_image_t *	image;
+    pixman_link_t	mru_link;
+};
+
+struct pixman_glyph_cache_t
+{
+    int			n_glyphs;
+    int			n_tombstones;
+    int			freeze_count;
+    pixman_list_t	mru;
+    glyph_t *		glyphs[HASH_SIZE];
+};
+
+static void
+free_glyph (glyph_t *glyph)
+{
+    pixman_list_unlink (&glyph->mru_link);
+    pixman_image_unref (glyph->image);
+    free (glyph);
+}
+
+static unsigned int
+hash (const void *font_key, const void *glyph_key)
+{
+    size_t key = (size_t)font_key + (size_t)glyph_key;
+
+    /* This hash function is based on one found on Thomas Wang's
+     * web page at
+     *
+     *    http://www.concentric.net/~Ttwang/tech/inthash.htm
+     *
+     */
+    key = (key << 15) - key - 1;
+    key = key ^ (key >> 12);
+    key = key + (key << 2);
+    key = key ^ (key >> 4);
+    key = key + (key << 3) + (key << 11);
+    key = key ^ (key >> 16);
+
+    return key;
+}
+
+static glyph_t *
+lookup_glyph (pixman_glyph_cache_t *cache,
+	      void                 *font_key,
+	      void                 *glyph_key)
+{
+    unsigned idx;
+    glyph_t *g;
+
+    idx = hash (font_key, glyph_key);
+    while ((g = cache->glyphs[idx++ & HASH_MASK]))
+    {
+	if (g != TOMBSTONE			&&
+	    g->font_key == font_key		&&
+	    g->glyph_key == glyph_key)
+	{
+	    return g;
+	}
+    }
+
+    return NULL;
+}
+
+static void
+insert_glyph (pixman_glyph_cache_t *cache,
+	      glyph_t              *glyph)
+{
+    unsigned idx;
+    glyph_t **loc;
+
+    idx = hash (glyph->font_key, glyph->glyph_key);
+
+    /* Note: we assume that there is room in the table. If there isn't,
+     * this will be an infinite loop.
+     */
+    do
+    {
+	loc = &cache->glyphs[idx++ & HASH_MASK];
+    } while (*loc && *loc != TOMBSTONE);
+
+    if (*loc == TOMBSTONE)
+	cache->n_tombstones--;
+    cache->n_glyphs++;
+
+    *loc = glyph;
+}
+
+static void
+remove_glyph (pixman_glyph_cache_t *cache,
+	      glyph_t              *glyph)
+{
+    unsigned idx;
+
+    idx = hash (glyph->font_key, glyph->glyph_key);
+    while (cache->glyphs[idx & HASH_MASK] != glyph)
+	idx++;
+
+    cache->glyphs[idx & HASH_MASK] = TOMBSTONE;
+    cache->n_tombstones++;
+    cache->n_glyphs--;
+
+    /* Eliminate tombstones if possible */
+    if (cache->glyphs[(idx + 1) & HASH_MASK] == NULL)
+    {
+	while (cache->glyphs[idx & HASH_MASK] == TOMBSTONE)
+	{
+	    cache->glyphs[idx & HASH_MASK] = NULL;
+	    cache->n_tombstones--;
+	    idx--;
+	}
+    }
+}
+
+static void
+clear_table (pixman_glyph_cache_t *cache)
+{
+    int i;
+
+    for (i = 0; i < HASH_SIZE; ++i)
+    {
+	glyph_t *glyph = cache->glyphs[i];
+
+	if (glyph && glyph != TOMBSTONE)
+	    free_glyph (glyph);
+
+	cache->glyphs[i] = NULL;
+    }
+
+    cache->n_glyphs = 0;
+    cache->n_tombstones = 0;
+}
+
+PIXMAN_EXPORT pixman_glyph_cache_t *
+pixman_glyph_cache_create (void)
+{
+    pixman_glyph_cache_t *cache;
+
+    if (!(cache = malloc (sizeof *cache)))
+	return NULL;
+
+    memset (cache->glyphs, 0, sizeof (cache->glyphs));
+    cache->n_glyphs = 0;
+    cache->n_tombstones = 0;
+    cache->freeze_count = 0;
+
+    pixman_list_init (&cache->mru);
+
+    return cache;
+}
+
+PIXMAN_EXPORT void
+pixman_glyph_cache_destroy (pixman_glyph_cache_t *cache)
+{
+    return_if_fail (cache->freeze_count == 0);
+
+    clear_table (cache);
+
+    free (cache);
+}
+
+PIXMAN_EXPORT void
+pixman_glyph_cache_freeze (pixman_glyph_cache_t  *cache)
+{
+    cache->freeze_count++;
+}
+
+PIXMAN_EXPORT void
+pixman_glyph_cache_thaw (pixman_glyph_cache_t  *cache)
+{
+    if (--cache->freeze_count == 0					&&
+	cache->n_glyphs + cache->n_tombstones > N_GLYPHS_HIGH_WATER)
+    {
+	if (cache->n_tombstones > N_GLYPHS_HIGH_WATER)
+	{
+	    /* More than half the entries are
+	     * tombstones. Just dump the whole table.
+	     */
+	    clear_table (cache);
+	}
+
+	while (cache->n_glyphs > N_GLYPHS_LOW_WATER)
+	{
+	    glyph_t *glyph = CONTAINER_OF (glyph_t, mru_link, cache->mru.tail);
+
+	    remove_glyph (cache, glyph);
+	    free_glyph (glyph);
+	}
+    }
+}
+
+PIXMAN_EXPORT const void *
+pixman_glyph_cache_lookup (pixman_glyph_cache_t  *cache,
+			   void                  *font_key,
+			   void                  *glyph_key)
+{
+    return lookup_glyph (cache, font_key, glyph_key);
+}
+
+PIXMAN_EXPORT const void *
+pixman_glyph_cache_insert (pixman_glyph_cache_t  *cache,
+			   void                  *font_key,
+			   void                  *glyph_key,
+			   int			  origin_x,
+			   int                    origin_y,
+			   pixman_image_t        *image)
+{
+    glyph_t *glyph;
+    int32_t width, height;
+
+    return_val_if_fail (cache->freeze_count > 0, NULL);
+    return_val_if_fail (image->type == BITS, NULL);
+
+    width = image->bits.width;
+    height = image->bits.height;
+
+    if (cache->n_glyphs >= HASH_SIZE)
+	return NULL;
+
+    if (!(glyph = malloc (sizeof *glyph)))
+	return NULL;
+
+    glyph->font_key = font_key;
+    glyph->glyph_key = glyph_key;
+    glyph->origin_x = origin_x;
+    glyph->origin_y = origin_y;
+
+    if (!(glyph->image = pixman_image_create_bits (
+	      image->bits.format, width, height, NULL, -1)))
+    {
+	free (glyph);
+	return NULL;
+    }
+
+    pixman_image_composite32 (PIXMAN_OP_SRC,
+			      image, NULL, glyph->image, 0, 0, 0, 0, 0, 0,
+			      width, height);
+
+    if (PIXMAN_FORMAT_A   (glyph->image->bits.format) != 0	&&
+	PIXMAN_FORMAT_RGB (glyph->image->bits.format) != 0)
+    {
+	pixman_image_set_component_alpha (glyph->image, TRUE);
+    }
+
+    pixman_list_prepend (&cache->mru, &glyph->mru_link);
+
+    _pixman_image_validate (glyph->image);
+    insert_glyph (cache, glyph);
+
+    return glyph;
+}
+
+PIXMAN_EXPORT void
+pixman_glyph_cache_remove (pixman_glyph_cache_t  *cache,
+			   void                  *font_key,
+			   void                  *glyph_key)
+{
+    glyph_t *glyph;
+
+    if ((glyph = lookup_glyph (cache, font_key, glyph_key)))
+    {
+	remove_glyph (cache, glyph);
+
+	free_glyph (glyph);
+    }
+}
+
+PIXMAN_EXPORT void
+pixman_glyph_get_extents (pixman_glyph_cache_t *cache,
+			  int                   n_glyphs,
+			  pixman_glyph_t       *glyphs,
+			  pixman_box32_t       *extents)
+{
+    int i;
+
+    extents->x1 = extents->y1 = INT32_MAX;
+    extents->x2 = extents->y2 = INT32_MIN;
+
+    for (i = 0; i < n_glyphs; ++i)
+    {
+	glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
+	int x1, y1, x2, y2;
+
+	x1 = glyphs[i].x - glyph->origin_x;
+	y1 = glyphs[i].y - glyph->origin_y;
+	x2 = glyphs[i].x - glyph->origin_x + glyph->image->bits.width;
+	y2 = glyphs[i].y - glyph->origin_y + glyph->image->bits.height;
+
+	if (x1 < extents->x1)
+	    extents->x1 = x1;
+	if (y1 < extents->y1)
+	    extents->y1 = y1;
+	if (x2 > extents->x2)
+	    extents->x2 = x2;
+	if (y2 > extents->y2)
+	    extents->y2 = y2;
+    }
+}
+
+/* This function returns a format that is suitable for use as a mask for the
+ * set of glyphs in question.
+ */
+PIXMAN_EXPORT pixman_format_code_t
+pixman_glyph_get_mask_format (pixman_glyph_cache_t *cache,
+			      int		    n_glyphs,
+			      const pixman_glyph_t *glyphs)
+{
+    pixman_format_code_t format = PIXMAN_a1;
+    int i;
+
+    for (i = 0; i < n_glyphs; ++i)
+    {
+	const glyph_t *glyph = glyphs[i].glyph;
+	pixman_format_code_t glyph_format = glyph->image->bits.format;
+
+	if (PIXMAN_FORMAT_TYPE (glyph_format) == PIXMAN_TYPE_A)
+	{
+	    if (PIXMAN_FORMAT_A (glyph_format) > PIXMAN_FORMAT_A (format))
+		format = glyph_format;
+	}
+	else
+	{
+	    return PIXMAN_a8r8g8b8;
+	}
+    }
+
+    return format;
+}
+
+static pixman_bool_t
+box32_intersect (pixman_box32_t *dest,
+		 const pixman_box32_t *box1,
+		 const pixman_box32_t *box2)
+{
+    dest->x1 = MAX (box1->x1, box2->x1);
+    dest->y1 = MAX (box1->y1, box2->y1);
+    dest->x2 = MIN (box1->x2, box2->x2);
+    dest->y2 = MIN (box1->y2, box2->y2);
+
+    return dest->x2 > dest->x1 && dest->y2 > dest->y1;
+}
+
+#if defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__)
+__attribute__((__force_align_arg_pointer__))
+#endif
+PIXMAN_EXPORT void
+pixman_composite_glyphs_no_mask (pixman_op_t            op,
+				 pixman_image_t        *src,
+				 pixman_image_t        *dest,
+				 int32_t                src_x,
+				 int32_t                src_y,
+				 int32_t                dest_x,
+				 int32_t                dest_y,
+				 pixman_glyph_cache_t  *cache,
+				 int                    n_glyphs,
+				 const pixman_glyph_t  *glyphs)
+{
+    pixman_region32_t region;
+    pixman_format_code_t glyph_format = PIXMAN_null;
+    uint32_t glyph_flags = 0;
+    pixman_format_code_t dest_format;
+    uint32_t dest_flags;
+    pixman_composite_func_t func = NULL;
+    pixman_implementation_t *implementation = NULL;
+    pixman_composite_info_t info;
+    int i;
+
+    _pixman_image_validate (src);
+    _pixman_image_validate (dest);
+    
+    dest_format = dest->common.extended_format_code;
+    dest_flags = dest->common.flags;
+    
+    pixman_region32_init (&region);
+    if (!_pixman_compute_composite_region32 (
+	    &region,
+	    src, NULL, dest,
+	    src_x - dest_x, src_y - dest_y, 0, 0, 0, 0,
+	    dest->bits.width, dest->bits.height))
+    {
+	goto out;
+    }
+
+    info.op = op;
+    info.src_image = src;
+    info.dest_image = dest;
+    info.src_flags = src->common.flags;
+    info.dest_flags = dest->common.flags;
+
+    for (i = 0; i < n_glyphs; ++i)
+    {
+	glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
+	pixman_image_t *glyph_img = glyph->image;
+	pixman_box32_t glyph_box;
+	pixman_box32_t *pbox;
+	uint32_t extra = FAST_PATH_SAMPLES_COVER_CLIP_NEAREST;
+	pixman_box32_t composite_box;
+	int n;
+
+	glyph_box.x1 = dest_x + glyphs[i].x - glyph->origin_x;
+	glyph_box.y1 = dest_y + glyphs[i].y - glyph->origin_y;
+	glyph_box.x2 = glyph_box.x1 + glyph->image->bits.width;
+	glyph_box.y2 = glyph_box.y1 + glyph->image->bits.height;
+	
+	pbox = pixman_region32_rectangles (&region, &n);
+	
+	info.mask_image = glyph_img;
+
+	while (n--)
+	{
+	    if (box32_intersect (&composite_box, pbox, &glyph_box))
+	    {
+		if (glyph_img->common.extended_format_code != glyph_format	||
+		    glyph_img->common.flags != glyph_flags)
+		{
+		    glyph_format = glyph_img->common.extended_format_code;
+		    glyph_flags = glyph_img->common.flags;
+
+		    _pixman_implementation_lookup_composite (
+			get_implementation(), op,
+			src->common.extended_format_code, src->common.flags,
+			glyph_format, glyph_flags | extra,
+			dest_format, dest_flags,
+			&implementation, &func);
+		}
+
+		info.src_x = src_x + composite_box.x1 - dest_x;
+		info.src_y = src_y + composite_box.y1 - dest_y;
+		info.mask_x = composite_box.x1 - (dest_x + glyphs[i].x - glyph->origin_x);
+		info.mask_y = composite_box.y1 - (dest_y + glyphs[i].y - glyph->origin_y);
+		info.dest_x = composite_box.x1;
+		info.dest_y = composite_box.y1;
+		info.width = composite_box.x2 - composite_box.x1;
+		info.height = composite_box.y2 - composite_box.y1;
+
+		info.mask_flags = glyph_flags;
+
+		func (implementation, &info);
+	    }
+
+	    pbox++;
+	}
+	pixman_list_move_to_front (&cache->mru, &glyph->mru_link);
+    }
+
+out:
+    pixman_region32_fini (&region);
+}
+
+static void
+add_glyphs (pixman_glyph_cache_t *cache,
+	    pixman_image_t *dest,
+	    int off_x, int off_y,
+	    int n_glyphs, const pixman_glyph_t *glyphs)
+{
+    pixman_format_code_t glyph_format = PIXMAN_null;
+    uint32_t glyph_flags = 0;
+    pixman_composite_func_t func = NULL;
+    pixman_implementation_t *implementation = NULL;
+    pixman_format_code_t dest_format;
+    uint32_t dest_flags;
+    pixman_box32_t dest_box;
+    pixman_composite_info_t info;
+    pixman_image_t *white_img = NULL;
+    pixman_bool_t white_src = FALSE;
+    int i;
+
+    _pixman_image_validate (dest);
+
+    dest_format = dest->common.extended_format_code;
+    dest_flags = dest->common.flags;
+
+    info.op = PIXMAN_OP_ADD;
+    info.dest_image = dest;
+    info.src_x = 0;
+    info.src_y = 0;
+    info.dest_flags = dest_flags;
+
+    dest_box.x1 = 0;
+    dest_box.y1 = 0;
+    dest_box.x2 = dest->bits.width;
+    dest_box.y2 = dest->bits.height;
+
+    for (i = 0; i < n_glyphs; ++i)
+    {
+	glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
+	pixman_image_t *glyph_img = glyph->image;
+	pixman_box32_t glyph_box;
+	pixman_box32_t composite_box;
+
+	if (glyph_img->common.extended_format_code != glyph_format	||
+	    glyph_img->common.flags != glyph_flags)
+	{
+	    pixman_format_code_t src_format, mask_format;
+
+	    glyph_format = glyph_img->common.extended_format_code;
+	    glyph_flags = glyph_img->common.flags;
+
+	    if (glyph_format == dest->bits.format)
+	    {
+		src_format = glyph_format;
+		mask_format = PIXMAN_null;
+		info.src_flags = glyph_flags | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST;
+		info.mask_flags = FAST_PATH_IS_OPAQUE;
+		info.mask_image = NULL;
+		white_src = FALSE;
+	    }
+	    else
+	    {
+		if (!white_img)
+		{
+		    static const pixman_color_t white = { 0xffff, 0xffff, 0xffff, 0xffff };
+
+		    if (!(white_img = pixman_image_create_solid_fill (&white)))
+			goto out;
+
+		    _pixman_image_validate (white_img);
+		}
+
+		src_format = PIXMAN_solid;
+		mask_format = glyph_format;
+		info.src_flags = white_img->common.flags;
+		info.mask_flags = glyph_flags | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST;
+		info.src_image = white_img;
+		white_src = TRUE;
+	    }
+
+	    _pixman_implementation_lookup_composite (
+		get_implementation(), PIXMAN_OP_ADD,
+		src_format, info.src_flags,
+		mask_format, info.mask_flags,
+		dest_format, dest_flags,
+		&implementation, &func);
+	}
+
+	glyph_box.x1 = glyphs[i].x - glyph->origin_x + off_x;
+	glyph_box.y1 = glyphs[i].y - glyph->origin_y + off_y;
+	glyph_box.x2 = glyph_box.x1 + glyph->image->bits.width;
+	glyph_box.y2 = glyph_box.y1 + glyph->image->bits.height;
+	
+	if (box32_intersect (&composite_box, &glyph_box, &dest_box))
+	{
+	    int src_x = composite_box.x1 - glyph_box.x1;
+	    int src_y = composite_box.y1 - glyph_box.y1;
+
+	    if (white_src)
+		info.mask_image = glyph_img;
+	    else
+		info.src_image = glyph_img;
+
+	    info.mask_x = info.src_x = src_x;
+	    info.mask_y = info.src_y = src_y;
+	    info.dest_x = composite_box.x1;
+	    info.dest_y = composite_box.y1;
+	    info.width = composite_box.x2 - composite_box.x1;
+	    info.height = composite_box.y2 - composite_box.y1;
+
+	    func (implementation, &info);
+
+	    pixman_list_move_to_front (&cache->mru, &glyph->mru_link);
+	}
+    }
+
+out:
+    if (white_img)
+	pixman_image_unref (white_img);
+}
+
+/* Conceptually, for each glyph, (white IN glyph) is PIXMAN_OP_ADDed to an
+ * infinitely big mask image at the position such that the glyph origin point
+ * is positioned at the (glyphs[i].x, glyphs[i].y) point.
+ *
+ * Then (mask_x, mask_y) in the infinite mask and (src_x, src_y) in the source
+ * image are both aligned with (dest_x, dest_y) in the destination image. Then
+ * these three images are composited within the 
+ *
+ *       (dest_x, dest_y, dst_x + width, dst_y + height)
+ *
+ * rectangle.
+ *
+ * TODO:
+ *   - Trim the mask to the destination clip/image?
+ *   - Trim composite region based on sources, when the op ignores 0s.
+ */
+#if defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__)
+__attribute__((__force_align_arg_pointer__))
+#endif
+PIXMAN_EXPORT void
+pixman_composite_glyphs (pixman_op_t            op,
+			 pixman_image_t        *src,
+			 pixman_image_t        *dest,
+			 pixman_format_code_t   mask_format,
+			 int32_t                src_x,
+			 int32_t                src_y,
+			 int32_t		mask_x,
+			 int32_t		mask_y,
+			 int32_t                dest_x,
+			 int32_t                dest_y,
+			 int32_t                width,
+			 int32_t                height,
+			 pixman_glyph_cache_t  *cache,
+			 int			n_glyphs,
+			 const pixman_glyph_t  *glyphs)
+{
+    pixman_image_t *mask;
+
+    if (!(mask = pixman_image_create_bits (mask_format, width, height, NULL, -1)))
+	return;
+
+    if (PIXMAN_FORMAT_A   (mask_format) != 0 &&
+	PIXMAN_FORMAT_RGB (mask_format) != 0)
+    {
+	pixman_image_set_component_alpha (mask, TRUE);
+    }
+
+    add_glyphs (cache, mask, - mask_x, - mask_y, n_glyphs, glyphs);
+
+    pixman_image_composite32 (op, src, mask, dest,
+			      src_x, src_y,
+			      0, 0,
+			      dest_x, dest_y,
+			      width, height);
+
+    pixman_image_unref (mask);
+}