#ifndef _IMAGES_IMAGES_H
#define _IMAGES_IMAGES_H
-#include "lib/bbuf.h"
+#include "ucw/bbuf.h"
struct mempool;
struct fastbuf;
#define IMAGE_SSE_ALIGN_SIZE 16
enum image_flag {
- IMAGE_COLOR_SPACE = 0x7, /* mask for enum color_space */
- IMAGE_ALPHA = 0x8, /* alpha channel */
- IMAGE_PIXELS_ALIGNED = 0x10, /* align pixel size to the nearest power of two */
- IMAGE_SSE_ALIGNED = 0x20, /* align scanlines to multiples of 16 bytes (both start and size) */
- IMAGE_NEED_DESTROY = 0x40, /* image is allocated with xmalloc */
- IMAGE_GAPS_PROTECTED = 0x80, /* cannot access gaps between rows */
+ IMAGE_COLOR_SPACE = 0xf, /* mask for enum color_space */
+ IMAGE_ALPHA = 0x10, /* alpha channel */
+ IMAGE_PIXELS_ALIGNED = 0x20, /* align pixel size to the nearest power of two */
+ IMAGE_SSE_ALIGNED = 0x40, /* align scanlines to multiples of 16 bytes (both start and size) */
+ IMAGE_NEED_DESTROY = 0x80, /* image is allocated with xmalloc */
+ IMAGE_GAPS_PROTECTED = 0x100, /* cannot access gaps between rows */
IMAGE_CHANNELS_FORMAT = IMAGE_COLOR_SPACE | IMAGE_ALPHA,
IMAGE_PIXEL_FORMAT = IMAGE_CHANNELS_FORMAT | IMAGE_PIXELS_ALIGNED,
IMAGE_ALIGNED = IMAGE_PIXELS_ALIGNED | IMAGE_SSE_ALIGNED,
IMAGE_INTERNAL_FLAGS = IMAGE_NEED_DESTROY | IMAGE_GAPS_PROTECTED,
};
+#define IMAGE_MAX_CHANNELS 4
+#define IMAGE_CHANNELS_FORMAT_MAX_SIZE 128
+byte *image_channels_format_to_name(uns format, byte *buf);
+uns image_name_to_channels_format(byte *name);
+
+struct color {
+ byte c[IMAGE_MAX_CHANNELS];
+ byte color_space;
+};
+
struct image {
byte *pixels; /* aligned top left pixel, there are at least sizeof(uns)
unused bytes after the buffer (possible optimizations) */
uns cols; /* number of columns */
uns rows; /* number of rows */
+ uns channels; /* number of color channels including the alpha channel */
uns pixel_size; /* size of pixel in bytes (1, 2, 3 or 4) */
uns row_size; /* scanline size in bytes */
uns row_pixels_size; /* scanline size in bytes excluding rows gaps */
{
return cols && rows && cols <= image_max_dim && rows <= image_max_dim;
}
-
-byte *color_space_to_name(uns cs);
-byte *image_channels_format_to_name(uns format);
-uns image_name_to_channels_format(byte *name);
-
-struct color {
- byte c[3];
- byte color_space;
-} PACKED;
-
/* scale.c */
int image_scale(struct image_context *ctx, struct image *dest, struct image *src);
void image_dimensions_fit_to_box(uns *cols, uns *rows, uns max_cols, uns max_rows, uns upsample);
-/* alpha.c */
-
-int image_apply_background(struct image_context *ctx, struct image *dest, struct image *src, struct color *background);
-
/* image-io.c */
enum image_format {
};
struct image_io {
- /* R - read_header input */
- /* H - read_header output */
- /* I - read_data input */
- /* O - read_data output */
- /* W - write input */
+ /* R - read_header input */
+ /* H - read_header output */
+ /* I - read_data input */
+ /* O - read_data output */
+ /* W - write input */
struct image *image; /* [ OW] - image data */
enum image_format format; /* [R W] - file format (IMAGE_FORMAT_x) */
- struct fastbuf *fastbuf; /* [R W] - source/destination stream */
+ struct fastbuf *fastbuf; /* [R W] - source/destination stream */
struct mempool *pool; /* [ I ] - parameter to image_new */
uns cols; /* [ HI ] - number of columns, parameter to image_new */
uns rows; /* [ HI ] - number of rows, parameter to image_new */