XML: Implemented a merger of element's contents.

[libucw.git] / images / io-libmagick.c

diff --git a/images/io-libmagick.c b/images/io-libmagick.c
index d75f0a8938e7168856a5a73721ba507cf404a696..60d3615941c0330fa7fa833670ea394f5ef54026 100644 (file)
--- a/images/io-libmagick.c
+++ b/images/io-libmagick.c
@@ -13,19 +13,24 @@
 #include "lib/mempool.h"
 #include "lib/fastbuf.h"
 #include "images/images.h"
+#include "images/error.h"
 #include "images/color.h"
 #include "images/io-main.h"
+
 #include <sys/types.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <magick/api.h>
+#include <pthread.h>
 
 #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)
+#define ALPHA_TO_BYTE(x) (255 - QUANTUM_TO_BYTE(x))
+#define BYTE_TO_ALPHA(x) (BYTE_TO_QUANTUM(255 - (x)))
 
+static pthread_mutex_t libmagick_mutex = PTHREAD_MUTEX_INITIALIZER;
 static uns libmagick_counter;
 
 struct magick_read_data {
@@ -37,18 +42,20 @@ struct magick_read_data {
 int
 libmagick_init(struct image_io *io UNUSED)
 {
-  // FIXME: lock
+  pthread_mutex_lock(&libmagick_mutex);
   if (!libmagick_counter++)
     InitializeMagick(NULL);
+  pthread_mutex_unlock(&libmagick_mutex);
   return 1;
 }
 
 void
 libmagick_cleanup(struct image_io *io UNUSED)
 {
-  // FIXME: lock
+  pthread_mutex_lock(&libmagick_mutex);
   if (!--libmagick_counter)
     DestroyMagick();
+  pthread_mutex_unlock(&libmagick_mutex);
 }
 
 static void
@@ -78,7 +85,7 @@ libmagick_read_header(struct image_io *io)
   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.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_READ_FAILED, "Too long stream.");
       return 0;
     }
   uns buf_size = file_size;
@@ -98,12 +105,12 @@ libmagick_read_header(struct image_io *io)
   xfree(buf);
   if (unlikely(!rd->image))
     {
-      image_thread_err(io->thread, IMAGE_ERR_READ_FAILED, "GraphicsMagick failed to read the image.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_READ_FAILED, "GraphicsMagick failed to read the image.");
       goto err;
     }
-  if (unlikely(rd->image->columns > IMAGE_MAX_SIZE || rd->image->rows > IMAGE_MAX_SIZE))
+  if (unlikely(rd->image->columns > image_max_dim || rd->image->rows > image_max_dim))
     {
-      image_thread_err(io->thread, IMAGE_ERR_INVALID_DIMENSIONS, "Image too large.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_INVALID_DIMENSIONS, "Image too large.");
       goto err;
     }
 
@@ -163,8 +170,11 @@ libmagick_read_data(struct image_io *io)
   /* Prepare the image */
   struct image_io_read_data_internals rdi;
   uns read_flags = io->flags;
+  uns cs = read_flags & IMAGE_COLOR_SPACE;
+  if (cs != COLOR_SPACE_GRAYSCALE && cs != COLOR_SPACE_RGB)
+    read_flags = (read_flags & ~IMAGE_COLOR_SPACE & IMAGE_PIXEL_FORMAT) | COLOR_SPACE_RGB;
   if ((read_flags & IMAGE_IO_USE_BACKGROUND) && !(read_flags & IMAGE_ALPHA))
-    read_flags = (read_flags | IMAGE_ALPHA) & IMAGE_CHANNELS_FORMAT;
+    read_flags = (read_flags & IMAGE_CHANNELS_FORMAT) | IMAGE_ALPHA;
   if (unlikely(!image_io_read_data_prepare(&rdi, io, rd->image->columns, rd->image->rows, read_flags)))
     {
       libmagick_destroy_read_data(rd);
@@ -175,7 +185,7 @@ libmagick_read_data(struct image_io *io)
   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.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_READ_FAILED, "Cannot acquire image pixels.");
       libmagick_destroy_read_data(rd);
       image_io_read_data_break(&rdi, io);
       return 0;
@@ -204,7 +214,7 @@ libmagick_read_data(struct image_io *io)
 #       define IMAGE_WALK_COL_STEP 2
 #       define IMAGE_WALK_DO_STEP do{ \
          walk_pos[0] = libmagick_pixel_to_gray(src); \
-         walk_pos[1] = QUANTUM_TO_BYTE(src->opacity); \
+         walk_pos[1] = ALPHA_TO_BYTE(src->opacity); \
          src++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -233,7 +243,7 @@ libmagick_read_data(struct image_io *io)
          walk_pos[0] = QUANTUM_TO_BYTE(src->red); \
          walk_pos[1] = QUANTUM_TO_BYTE(src->green); \
          walk_pos[2] = QUANTUM_TO_BYTE(src->blue); \
-         walk_pos[3] = QUANTUM_TO_BYTE(src->opacity); \
+         walk_pos[3] = ALPHA_TO_BYTE(src->opacity); \
          src++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -272,7 +282,8 @@ libmagick_write(struct image_io *io)
         info->colorspace = RGBColorspace;
         break;
       default:
-        ASSERT(0);
+        IMAGE_ERROR(io->context, IMAGE_ERROR_WRITE_FAILED, "Unsupported color space.");
+        goto err;
     }
   switch (io->format)
     {
@@ -293,7 +304,7 @@ libmagick_write(struct image_io *io)
   Image *image = AllocateImage(info);
   if (unlikely(!image))
     {
-      image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "GraphicsMagick failed to allocate the image.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_WRITE_FAILED, "GraphicsMagick failed to allocate the image.");
       goto err;
     }
   image->columns = img->cols;
@@ -303,7 +314,7 @@ libmagick_write(struct image_io *io)
   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.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_WRITE_FAILED, "Cannot get GraphicsMagick pixels.");
       goto err2;
     }
 
@@ -320,7 +331,7 @@ libmagick_write(struct image_io *io)
          dest->red = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->green = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->blue = BYTE_TO_QUANTUM(walk_pos[0]); \
-         dest->opacity = OPACITY_MAX; \
+         dest->opacity = 0; \
          dest++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -335,7 +346,7 @@ libmagick_write(struct image_io *io)
          dest->red = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->green = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->blue = BYTE_TO_QUANTUM(walk_pos[0]); \
-         dest->opacity = BYTE_TO_QUANTUM(walk_pos[1]); \
+         dest->opacity = BYTE_TO_ALPHA(walk_pos[1]); \
          dest++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -350,7 +361,7 @@ libmagick_write(struct image_io *io)
          dest->red = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->green = BYTE_TO_QUANTUM(walk_pos[1]); \
          dest->blue = BYTE_TO_QUANTUM(walk_pos[2]); \
-         dest->opacity = OPACITY_MAX; \
+         dest->opacity = 0; \
          dest++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -365,7 +376,7 @@ libmagick_write(struct image_io *io)
          dest->red = BYTE_TO_QUANTUM(walk_pos[0]); \
          dest->green = BYTE_TO_QUANTUM(walk_pos[1]); \
          dest->blue = BYTE_TO_QUANTUM(walk_pos[2]); \
-         dest->opacity = BYTE_TO_QUANTUM(walk_pos[3]); \
+         dest->opacity = BYTE_TO_ALPHA(walk_pos[3]); \
          dest++; }while(0)
 #       include "images/image-walk.h"
        break;
@@ -377,7 +388,7 @@ libmagick_write(struct image_io *io)
   /* Store pixels */
   if (unlikely(!SyncImagePixels(image)))
     {
-      image_thread_err(io->thread, IMAGE_ERR_WRITE_FAILED, "Cannot sync GraphicsMagick pixels.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_WRITE_FAILED, "Cannot sync GraphicsMagick pixels.");
       goto err2;
     }
 
@@ -386,12 +397,12 @@ libmagick_write(struct image_io *io)
   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.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_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.");
+      IMAGE_ERROR(io->context, IMAGE_ERROR_WRITE_FAILED, "Image too large.");
       goto err2;
     }