You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
227 lines
6.6 KiB
227 lines
6.6 KiB
/*
|
|
* Image Library -- Basic image manipulation
|
|
*
|
|
* (c) 2006 Pavel Charvat <pchar@ucw.cz>
|
|
*
|
|
* This software may be freely distributed and used according to the terms
|
|
* of the GNU Lesser General Public License.
|
|
*/
|
|
|
|
#undef LOCAL_DEBUG
|
|
|
|
#include <ucw/lib.h>
|
|
#include <ucw/mempool.h>
|
|
#include <images/images.h>
|
|
#include <images/error.h>
|
|
#include <images/color.h>
|
|
|
|
#include <string.h>
|
|
|
|
static inline uint
|
|
flags_to_pixel_size(uint flags)
|
|
{
|
|
uint pixel_size = color_space_channels[flags & IMAGE_COLOR_SPACE];
|
|
if (flags & IMAGE_ALPHA)
|
|
pixel_size++;
|
|
return pixel_size;
|
|
}
|
|
|
|
struct image *
|
|
image_new(struct image_context *ctx, uint cols, uint rows, uint flags, struct mempool *pool)
|
|
{
|
|
DBG("image_new(cols=%u rows=%u flags=0x%x pool=%p)", cols, rows, flags, pool);
|
|
flags &= IMAGE_NEW_FLAGS;
|
|
if (unlikely(!image_dimensions_valid(cols, rows)))
|
|
{
|
|
IMAGE_ERROR(ctx, IMAGE_ERROR_INVALID_DIMENSIONS, "Invalid image dimensions (%ux%u)", cols, rows);
|
|
return NULL;
|
|
}
|
|
struct image *img;
|
|
uint channels, pixel_size, row_pixels_size, row_size, align;
|
|
pixel_size = channels = flags_to_pixel_size(flags);
|
|
if (!channels || channels > 4)
|
|
{
|
|
IMAGE_ERROR(ctx, IMAGE_ERROR_INVALID_PIXEL_FORMAT, "Invalid number of color channels (%u)", channels);
|
|
return NULL;
|
|
}
|
|
switch (channels)
|
|
{
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
flags |= IMAGE_PIXELS_ALIGNED;
|
|
break;
|
|
case 3:
|
|
if (flags & IMAGE_PIXELS_ALIGNED)
|
|
pixel_size = 4;
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
if (flags & IMAGE_SSE_ALIGNED)
|
|
align = IMAGE_SSE_ALIGN_SIZE;
|
|
else if (flags & IMAGE_PIXELS_ALIGNED)
|
|
align = pixel_size;
|
|
else
|
|
align = 1;
|
|
row_pixels_size = cols * pixel_size;
|
|
row_size = ALIGN_TO(row_pixels_size, align);
|
|
u64 image_size_64 = (u64)row_size * rows;
|
|
u64 bytes_64 = image_size_64 + (sizeof(struct image) + IMAGE_SSE_ALIGN_SIZE - 1 + sizeof(uint));
|
|
if (unlikely(bytes_64 > image_max_bytes))
|
|
{
|
|
IMAGE_ERROR(ctx, IMAGE_ERROR_INVALID_DIMENSIONS, "Image does not fit in memory");
|
|
return NULL;
|
|
}
|
|
if (pool)
|
|
img = mp_alloc(pool, bytes_64);
|
|
else
|
|
{
|
|
img = xmalloc(bytes_64);
|
|
flags |= IMAGE_NEED_DESTROY;
|
|
}
|
|
bzero(img, sizeof(struct image));
|
|
byte *p = (byte *)img + sizeof(struct image);
|
|
img->pixels = ALIGN_PTR(p, IMAGE_SSE_ALIGN_SIZE);
|
|
img->flags = flags;
|
|
img->channels = channels;
|
|
img->pixel_size = pixel_size;
|
|
img->cols = cols;
|
|
img->rows = rows;
|
|
img->row_size = row_size;
|
|
img->row_pixels_size = row_pixels_size;
|
|
img->image_size = image_size_64;
|
|
DBG("img=%p flags=0x%x pixel_size=%u row_size=%u image_size=%u pixels=%p",
|
|
img, img->flags, img->pixel_size, img->row_size, img->image_size, img->pixels);
|
|
return img;
|
|
}
|
|
|
|
struct image *
|
|
image_clone(struct image_context *ctx, struct image *src, uint flags, struct mempool *pool)
|
|
{
|
|
DBG("image_clone(src=%p flags=0x%x pool=%p)", src, src->flags, pool);
|
|
struct image *img;
|
|
flags &= IMAGE_NEW_FLAGS & ~IMAGE_CHANNELS_FORMAT;
|
|
flags |= src->flags & IMAGE_CHANNELS_FORMAT;
|
|
if (!(img = image_new(ctx, src->cols, src->rows, flags, pool)))
|
|
return NULL;
|
|
ASSERT(src->channels == img->channels);
|
|
if (img->image_size)
|
|
{
|
|
if (src->pixel_size != img->pixel_size) /* conversion between aligned and unaligned RGB */
|
|
{
|
|
ASSERT(src->channels == 3);
|
|
# define IMAGE_WALK_PREFIX(x) walk_##x
|
|
# define IMAGE_WALK_INLINE
|
|
# define IMAGE_WALK_IMAGE img
|
|
# define IMAGE_WALK_SEC_IMAGE src
|
|
# define IMAGE_WALK_DOUBLE
|
|
# define IMAGE_WALK_DO_STEP do{ walk_pos[0] = walk_sec_pos[0]; walk_pos[1] = walk_sec_pos[1]; walk_pos[2] = walk_sec_pos[2]; }while(0)
|
|
# include <images/image-walk.h>
|
|
}
|
|
else if (src->row_size != img->row_size || ((img->flags | src->flags) & IMAGE_GAPS_PROTECTED))
|
|
{
|
|
byte *s = src->pixels;
|
|
byte *d = img->pixels;
|
|
for (uint row = src->rows; row--; )
|
|
{
|
|
memcpy(d, s, src->row_pixels_size);
|
|
d += img->row_size;
|
|
s += src->row_size;
|
|
}
|
|
}
|
|
else
|
|
memcpy(img->pixels, src->pixels, img->image_size);
|
|
}
|
|
return img;
|
|
}
|
|
|
|
void
|
|
image_destroy(struct image *img)
|
|
{
|
|
DBG("image_destroy(img=%p)", img);
|
|
if (img->flags & IMAGE_NEED_DESTROY)
|
|
xfree(img);
|
|
}
|
|
|
|
void
|
|
image_clear(struct image_context *ctx UNUSED, struct image *img)
|
|
{
|
|
DBG("image_clear(img=%p)", img);
|
|
if (img->image_size)
|
|
if (img->flags & IMAGE_GAPS_PROTECTED)
|
|
{
|
|
byte *p = img->pixels;
|
|
uint bytes = img->cols * img->pixel_size;
|
|
for (uint row = img->rows; row--; p += img->row_size)
|
|
bzero(p, bytes);
|
|
}
|
|
else
|
|
bzero(img->pixels, img->image_size);
|
|
}
|
|
|
|
struct image *
|
|
image_init_matrix(struct image_context *ctx, struct image *img, byte *pixels, uint cols, uint rows, uint row_size, uint flags)
|
|
{
|
|
DBG("image_init_matrix(img=%p pixels=%p cols=%u rows=%u row_size=%u flags=0x%x)", img, pixels, cols, rows, row_size, flags);
|
|
if (unlikely(!image_dimensions_valid(cols, rows)))
|
|
{
|
|
IMAGE_ERROR(ctx, IMAGE_ERROR_INVALID_DIMENSIONS, "Invalid image dimensions (%ux%u)", cols, rows);
|
|
return NULL;
|
|
}
|
|
img->pixels = pixels;
|
|
img->cols = cols;
|
|
img->rows = rows;
|
|
img->pixel_size = img->channels = flags_to_pixel_size(flags);
|
|
img->row_size = row_size;
|
|
img->row_pixels_size = cols * img->pixel_size;
|
|
img->image_size = rows * row_size;
|
|
img->flags = flags & (IMAGE_NEW_FLAGS | IMAGE_GAPS_PROTECTED);
|
|
return img;
|
|
}
|
|
|
|
struct image *
|
|
image_init_subimage(struct image_context *ctx UNUSED, struct image *img, struct image *src, uint left, uint top, uint cols, uint rows)
|
|
{
|
|
DBG("image_init_subimage(img=%p src=%p left=%u top=%u cols=%u rows=%u)", img, src, left, top, cols, rows);
|
|
ASSERT(left + cols <= src->cols && top + rows <= src->rows);
|
|
img->pixels = src->pixels + left * src->pixel_size + top * src->row_size;
|
|
img->cols = cols;
|
|
img->rows = rows;
|
|
img->pixel_size = img->channels = src->pixel_size;
|
|
img->row_size = src->row_size;
|
|
img->row_pixels_size = cols * src->pixel_size;
|
|
img->image_size = src->row_size * rows;
|
|
img->flags = src->flags & IMAGE_NEW_FLAGS;
|
|
img->flags |= IMAGE_GAPS_PROTECTED;
|
|
return img;
|
|
}
|
|
|
|
byte *
|
|
image_channels_format_to_name(uint format, byte *buf)
|
|
{
|
|
byte *cs_name = color_space_id_to_name(format & IMAGE_COLOR_SPACE);
|
|
uint l = strlen(cs_name);
|
|
memcpy(buf, cs_name, l + 1);
|
|
if (format & IMAGE_ALPHA)
|
|
strcpy(buf + l, "+Alpha");
|
|
return buf;
|
|
}
|
|
|
|
uint
|
|
image_name_to_channels_format(byte *name)
|
|
{
|
|
uint i;
|
|
if (i = color_space_name_to_id(name))
|
|
return i;
|
|
uint l = strlen(name);
|
|
if (l > 6 && !strcasecmp(name + l - 5, "+alpha"))
|
|
{
|
|
byte buf[l + 1];
|
|
memcpy(buf, name, l - 6);
|
|
buf[l - 6] = 0;
|
|
if (i = color_space_name_to_id(name))
|
|
return i;
|
|
}
|
|
return 0;
|
|
}
|
|
|