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#include <stdlib.h>
#include <pixman.h>
#include "fimage.h"
/* TODO:
*
* rename to fragment_list?
* is the memory management too crackful?
*/
struct fimage_t
{
pixman_bool_t broken;
int n_allocated_fragments;
int n_fragments;
fragment_t * fragments[1];
};
static const fimage_t broken_fimage =
{
TRUE, /* broken */
0, /* n_allocated_fragments */
0, /* n_fragments */
{ NULL } /* fragments */
};
static fimage_t *
fimage_ensure_space (fimage_t *fimage, int n_more)
{
int required_fragments = fimage->n_fragments + n_more;
if (required_fragments > fimage->n_allocated_fragments)
{
fimage_t *new_image;
size_t space;
int pot;
pot = 1;
while (pot < required_fragments)
pot *= 2;
space = sizeof (fimage_t) + (pot - 1) * sizeof (fragment_t *);
if (!(new_image = realloc (fimage, space)))
{
fimage_free (fimage);
return (fimage_t *)&broken_fimage;
}
new_image->n_allocated_fragments = pot;
fimage = new_image;
}
return fimage;
}
static fimage_t *
fimage_append_fragment (fimage_t *fimage, fragment_t *fragment)
{
if (fimage->broken || fragment_is_broken (fragment))
{
fimage_free (fimage);
fragment_free (fragment);
return (fimage_t *)&broken_fimage;
}
if (fragment_is_empty (fragment))
{
fragment_free (fragment);
return fimage;
}
fimage = fimage_ensure_space (fimage, 1);
if (fimage->broken)
return fimage;
fimage->fragments[fimage->n_fragments++] = fragment;
return fimage;
}
static fimage_t *
fimage_new (void)
{
fimage_t *fimage;
if (!(fimage = malloc (sizeof *fimage)))
return (fimage_t *)&broken_fimage;
fimage->broken = FALSE;
fimage->n_allocated_fragments = 1;
fimage->n_fragments = 0;
return fimage;
}
static fimage_t *
make_image (fragment_t *fragment)
{
return fimage_append_fragment (fimage_new(), fragment);
}
fimage_t *
fimage_new_blank (int width, int height)
{
return make_image (fragment_new_blank (width, height));
}
fimage_t *
fimage_new_white (int width, int height)
{
return make_image (fragment_new_white (width, height));
}
fimage_t *
fimage_new_traps (int width, int height,
int n_traps, pixman_trapezoid_t *traps)
{
return make_image (
fragment_new_traps (width, height, n_traps, traps));
}
fimage_t *
fimage_new_glyphs (int width, int height,
pixman_glyph_cache_t *cache,
int n_glyphs,
pixman_glyph_t *glyphs)
{
return make_image (
fragment_new_glyphs (width, height, cache, n_glyphs, glyphs));
}
/* Takes ownership of the image */
fimage_t *
fimage_new_image (int width, int height, pixman_image_t *image)
{
return make_image (fragment_new_image (width, height, image));
}
/* Makes a copy of the region; does not take ownership */
fimage_t *
fimage_new_region (int width, int height,
pixman_region32_t *region)
{
fragment_t *fragment1, *fragment2;
fimage_t *image;
fragment1 = fragment_new_region (region);
fragment2 = fragment_new_blank (width, height);
fragment2 = fragment_subtract (fragment1, fragment2);
image = fimage_new ();
image = fimage_append_fragment (image, fragment1);
image = fimage_append_fragment (image, fragment2);
return image;
}
fimage_t *
fimage_composite (fimage_t *dest, pixman_op_t op, fimage_t *source)
{
fimage_t *new_image;
int i, j;
if (dest->broken || source->broken)
{
fimage_free (dest);
return (fimage_t *)&broken_fimage;
}
new_image = fimage_new ();
for (i = 0; dest->n_fragments; ++i)
{
for (j = 0; j < source->n_fragments; ++j)
{
fragment_t *new_frag, *dfrag, *sfrag;
dfrag = dest->fragments[i];
sfrag = source->fragments[j];
new_frag = fragment_composite (dfrag, op, sfrag);
new_image = fimage_append_fragment (new_image, new_frag);
new_image = fimage_append_fragment (new_image, dfrag);
}
}
dest->n_fragments = 0;
fimage_free (dest);
return new_image;
}
void
fimage_paint (fimage_t *image, pixman_image_t *pimage)
{
int i;
for (i = 0; i < image->n_fragments; ++i)
{
fragment_t *fragment = image->fragments[i];
fragment_apply (fragment, pimage);
}
}
void
fimage_free (fimage_t *image)
{
int i;
for (i = 0; i < image->n_fragments; ++i)
fragment_free (image->fragments[i]);
free (image);
}
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