/*
- * Image Library -- GrapgicsMagick
+ * Image Library -- GraphicsMagick (slow fallback library)
*
* (c) 2006 Pavel Charvat <pchar@ucw.cz>
*
* of the GNU Lesser General Public License.
*/
-#define LOCAL_DEBUG
+#undef LOCAL_DEBUG
#include "lib/lib.h"
+#include "lib/mempool.h"
+#include "lib/fastbuf.h"
#include "images/images.h"
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <magick/api.h>
-int
-libmagick_read_header(struct image_io *io)
-{
- image_thread_err(io->thread, IMAGE_ERR_NOT_IMPLEMENTED, "GraphicsMagick read not implemented.");
- return 0;
-}
-
-int
-libmagick_read_data(struct image_io *io UNUSED)
-{
- ASSERT(0);
-}
-
-int
-libmagick_write(struct image_io *io)
-{
- image_thread_err(io->thread, IMAGE_ERR_NOT_IMPLEMENTED, "GraphicsMagick write not implemented.");
- return 0;
-}
+#define MAX_FILE_SIZE (1 << 30)
+#define QUANTUM_SCALE (QuantumDepth - 8)
+#define QUANTUM_TO_BYTE(x) ((uns)(x) >> QUANTUM_SCALE)
+#define BYTE_TO_QUANTUM(x) ((uns)(x) << QUANTUM_SCALE)
+#define OPACITY_MAX ((1 << QuantumDepth) - 1)
-#if 0
-struct magick_internals {
+struct magick_read_data {
ExceptionInfo exception;
- QuantizeInfo quantize;
ImageInfo *info;
+ Image *image;
};
static inline void
-magick_cleanup(struct image_io *io)
+libmagick_destroy_read_data(struct magick_read_data *rd)
{
- DestroyImageInfo(io->internals->info);
- DestroyExceptionInfo(&io->internals->exception);
+ if (rd->image)
+ DestroyImage(rd->image);
+ DestroyImageInfo(rd->info);
+ DestroyExceptionInfo(&rd->exception);
DestroyMagick();
}
-static int
-magick_read_header(struct image_io *io)
+static void
+libmagick_read_cancel(struct image_io *io)
+{
+ DBG("libmagick_read_cancel()");
+
+ struct magick_read_data *rd = io->read_data;
+
+ DestroyImage(rd->image);
+ libmagick_destroy_read_data(rd);
+}
+
+int
+libmagick_read_header(struct image_io *io)
{
- DBG("magick_read_header()");
- struct magick_internals *i = io->internals = mp_alloc(io->pool, sizeof(*i));
+ DBG("libmagick_read_header()");
+ /* Read entire stream */
+ sh_off_t file_size = bfilesize(io->fastbuf) - btell(io->fastbuf);
+ if (unlikely(file_size > MAX_FILE_SIZE))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_READ_FAILED, "Too long stream.");
+ return 0;
+ }
+ uns buf_size = file_size;
+ byte *buf = xmalloc(buf_size);
+ breadb(io->fastbuf, buf, buf_size);
+
+ /* Allocate read structure */
+ struct magick_read_data *rd = io->read_data = mp_alloc(io->internal_pool, sizeof(*rd));
+
+ /* Initialize GraphicsMagick */
InitializeMagick(NULL);
- GetExceptionInfo(&i->exception);
- i->info = CloneImageInfo(NULL);
- i->info->subrange = 1;
- GetQuantizeInfo(&i->quantize);
- i->quantize.colorspace = RGBColorspace;
+ GetExceptionInfo(&rd->exception);
+ rd->info = CloneImageInfo(NULL);
+ rd->info->subrange = 1;
- uns len = bfilesize(io->fastbuf);
- byte *buf = mp_alloc(io->pool, len);
- len = bread(io->fastbuf, buf, len);
+ /* Read the image */
+ rd->image = BlobToImage(rd->info, buf, buf_size, &rd->exception);
+ xfree(buf);
+ if (unlikely(!rd->image))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_READ_FAILED, "GraphicsMagick failed to read the image.");
+ goto err;
+ }
+ if (unlikely(rd->image->columns > IMAGE_MAX_SIZE || rd->image->rows > IMAGE_MAX_SIZE))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_INVALID_DIMENSIONS, "Image too large.");
+ goto err;
+ }
- Image *image = BlobToImage(magick_info, imo->thumb_data, imo->thumb_size, &magick_exception);
- if (unlikely(!image))
- goto error;
+ /* Fill image parameters */
+ io->cols = rd->image->columns;
+ io->rows = rd->image->rows;
+ switch (rd->image->colorspace)
+ {
+ case GRAYColorspace:
+ io->flags |= COLOR_SPACE_GRAYSCALE | IMAGE_ALPHA;
+ break;
+ default:
+ io->flags |= COLOR_SPACE_RGB | IMAGE_ALPHA;
+ break;
+ }
+ io->number_of_colors = rd->image->colors;
+ if (rd->image->storage_class == PseudoClass && rd->image->compression != JPEGCompression)
+ io->has_palette = 1;
- // FIXME
+ io->read_cancel = libmagick_read_cancel;
return 1;
-error:
- magick_cleanup(io);
+
+err:
+ libmagick_destroy_read_data(rd);
return 0;
}
-static int
-magick_read_data(struct image_io *io)
+static inline byte
+libmagick_pixel_to_gray(PixelPacket *pixel)
{
- DBG("magick_read_data()");
+ return ((uns)pixel->red * 19660 + (uns)pixel->green * 38666 + (uns)pixel->blue * 7210) >> (16 + QUANTUM_SCALE);
+}
+
+int
+libmagick_read_data(struct image_io *io)
+{
+ DBG("libmagick_read_data()");
+
+ struct magick_read_data *rd = io->read_data;
+
+ /* Quantize image */
+ switch (rd->image->colorspace)
+ {
+ case RGBColorspace:
+ case GRAYColorspace:
+ break;
+ default: ;
+ QuantizeInfo quantize;
+ GetQuantizeInfo(&quantize);
+ quantize.colorspace = RGBColorspace;
+ QuantizeImage(&quantize, rd->image);
+ break;
+ }
+
+ /* Allocate image for conversion */
+ int need_scale = io->cols != rd->image->columns || io->rows != rd->image->rows;
+ int need_destroy = need_scale || !io->pool;
+ struct image *img = need_scale ?
+ image_new(io->thread, rd->image->columns, rd->image->rows, io->flags & IMAGE_CHANNELS_FORMAT, NULL) :
+ image_new(io->thread, io->cols, io->rows, io->flags, io->pool);
+ if (unlikely(!img))
+ goto err;
+
+ /* Acquire pixels */
+ PixelPacket *src = (PixelPacket *)AcquireImagePixels(rd->image, 0, 0, rd->image->columns, rd->image->rows, &rd->exception);
+ if (unlikely(!src))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_READ_FAILED, "Cannot acquire image pixels.");
+ goto err;
+ }
+
+ /* Convert pixels */
+ switch (img->pixel_size)
+ {
+ case 1:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 1
+# define IMAGE_WALK_DO_STEP do{ \
+ pos[0] = libmagick_pixel_to_gray(src); \
+ src++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 2:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 2
+# define IMAGE_WALK_DO_STEP do{ \
+ pos[0] = libmagick_pixel_to_gray(src); \
+ pos[1] = QUANTUM_TO_BYTE(src->opacity); \
+ src++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 3:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 3
+# define IMAGE_WALK_DO_STEP do{ \
+ pos[0] = QUANTUM_TO_BYTE(src->red); \
+ pos[1] = QUANTUM_TO_BYTE(src->green); \
+ pos[2] = QUANTUM_TO_BYTE(src->blue); \
+ src++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 4:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 4
+# define IMAGE_WALK_DO_STEP do{ \
+ pos[0] = QUANTUM_TO_BYTE(src->red); \
+ pos[1] = QUANTUM_TO_BYTE(src->green); \
+ pos[2] = QUANTUM_TO_BYTE(src->blue); \
+ pos[3] = QUANTUM_TO_BYTE(src->opacity); \
+ src++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ default:
+ ASSERT(0);
+ }
- // FIXME
+ /* Free GraphicsMagick structures */
+ libmagick_destroy_read_data(rd);
- magick_cleanup(io);
+ /* Scale image */
+ if (need_scale)
+ {
+ struct image *img2 = image_new(io->thread, io->cols, io->rows, io->flags, io->pool);
+ if (unlikely(!img2))
+ goto err2;
+ int result = image_scale(io->thread, img2, img);
+ image_destroy(img);
+ img = img2;
+ need_destroy = !io->pool;
+ if (unlikely(!result))
+ goto err2;
+ }
+
+ /* Success */
+ io->image = img;
+ io->image_destroy = need_destroy;
return 1;
+
+ /* Free structures */
+err:
+ libmagick_destroy_read_data(rd);
+err2:
+ if (need_destroy)
+ image_destroy(img);
+ return 0;
}
-static int
-magick_decompress_thumbnail(struct image_obj *imo)
+int
+libmagick_write(struct image_io *io)
{
- DBG("Quantizing image");
- QuantizeImage(&magick_quantize, image);
- DBG("Converting pixels");
- PixelPacket *pixels = (PixelPacket *)AcquireImagePixels(image, 0, 0, image->columns, image->rows, &magick_exception);
- ASSERT(pixels);
- uns size = image->columns * image->rows;
- byte *p = imo->thumb.pixels = mp_alloc(imo->pool, imo->thumb.size = size * 3);
- for (uns i = 0; i < size; i++)
- {
- p[0] = pixels->red >> (QuantumDepth - 8);
- p[1] = pixels->green >> (QuantumDepth - 8);
- p[2] = pixels->blue >> (QuantumDepth - 8);
- p += 3;
- pixels++;
+ DBG("libmagick_write()");
+
+ /* Initialize GraphicsMagick */
+ int result = 0;
+ ExceptionInfo exception;
+ ImageInfo *info;
+ InitializeMagick(NULL);
+ GetExceptionInfo(&exception);
+ info = CloneImageInfo(NULL);
+
+ /* Setup image parameters and allocate the image*/
+ struct image *img = io->image;
+ switch (img->flags & IMAGE_COLOR_SPACE)
+ {
+ case COLOR_SPACE_GRAYSCALE:
+ info->colorspace = GRAYColorspace;
+ break;
+ case COLOR_SPACE_RGB:
+ info->colorspace = RGBColorspace;
+ break;
+ default:
+ ASSERT(0);
+ }
+ switch (io->format)
+ {
+ case IMAGE_FORMAT_JPEG:
+ strcpy(info->magick, "JPEG");
+ if (io->jpeg_quality)
+ info->quality = MIN(io->jpeg_quality, 100);
+ break;
+ case IMAGE_FORMAT_PNG:
+ strcpy(info->magick, "PNG");
+ break;
+ case IMAGE_FORMAT_GIF:
+ strcpy(info->magick, "GIF");
+ break;
+ default:
+ ASSERT(0);
+ }
+ Image *image = AllocateImage(info);
+ if (unlikely(!image))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "GraphicsMagick failed to allocate the image.");
+ goto err;
}
+ image->columns = img->cols;
+ image->rows = img->rows;
+
+ /* Get pixels */
+ PixelPacket *pixels = SetImagePixels(image, 0, 0, img->cols, img->rows), *dest = pixels;
+ if (unlikely(!pixels))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "Cannot get GraphicsMagick pixels.");
+ goto err2;
+ }
+
+ /* Convert pixels */
+ switch (img->pixel_size)
+ {
+ case 1:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 1
+# define IMAGE_WALK_DO_STEP do{ \
+ dest->red = BYTE_TO_QUANTUM(pos[0]); \
+ dest->green = BYTE_TO_QUANTUM(pos[0]); \
+ dest->blue = BYTE_TO_QUANTUM(pos[0]); \
+ dest->opacity = OPACITY_MAX; \
+ dest++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 2:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 2
+# define IMAGE_WALK_DO_STEP do{ \
+ dest->red = BYTE_TO_QUANTUM(pos[0]); \
+ dest->green = BYTE_TO_QUANTUM(pos[0]); \
+ dest->blue = BYTE_TO_QUANTUM(pos[0]); \
+ dest->opacity = BYTE_TO_QUANTUM(pos[1]); \
+ dest++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 3:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 3
+# define IMAGE_WALK_DO_STEP do{ \
+ dest->red = BYTE_TO_QUANTUM(pos[0]); \
+ dest->green = BYTE_TO_QUANTUM(pos[1]); \
+ dest->blue = BYTE_TO_QUANTUM(pos[2]); \
+ dest->opacity = OPACITY_MAX; \
+ dest++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ case 4:
+# define IMAGE_WALK_INLINE
+# define IMAGE_WALK_UNROLL 4
+# define IMAGE_WALK_COL_STEP 4
+# define IMAGE_WALK_DO_STEP do{ \
+ dest->red = BYTE_TO_QUANTUM(pos[0]); \
+ dest->green = BYTE_TO_QUANTUM(pos[1]); \
+ dest->blue = BYTE_TO_QUANTUM(pos[2]); \
+ dest->opacity = BYTE_TO_QUANTUM(pos[3]); \
+ dest++; }while(0)
+# include "images/image-walk.h"
+ break;
+
+ default:
+ ASSERT(0);
+ }
+
+ /* Store pixels */
+ if (unlikely(!SyncImagePixels(image)))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "Cannot sync GraphicsMagick pixels.");
+ goto err2;
+ }
+
+ /* Write image */
+ size_t buf_len = 0;
+ void *buf = ImageToBlob(info, image, &buf_len, &exception);
+ if (unlikely(!buf))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "GraphicsMagick failed to compress the image.");
+ goto err2;
+ }
+ if (unlikely(buf_len > MAX_FILE_SIZE))
+ {
+ image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "Image too large.");
+ goto err2;
+ }
+
+ /* Write to stream */
+ bwrite(io->fastbuf, buf, buf_len);
+
+ /* Success */
+ result = 1;
+
+err2:
DestroyImage(image);
- return 1;
+err:
+ DestroyImageInfo(info);
+ DestroyExceptionInfo(&exception);
+ DestroyMagick();
+ return result;
}
-#endif
projects / libucw.git / blobdiff