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19202fd2db
This patch is just adding a single header, but because it also modifies all the C files to add the #include, it was made as a patch on its own to ease review. Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/* load_magick.c - load image file using ImageMagick
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*
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* Raster graphics library
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*
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* Copyright (c) 2014 Window Maker Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include "config.h"
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#ifdef USE_MAGICK
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#if USE_MAGICK < 7
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#include <wand/magick_wand.h>
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#else
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#include <MagickWand/MagickWand.h>
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#endif
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#endif
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#include "wraster.h"
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#include "imgformat.h"
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#include "wr_i18n.h"
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static int RInitMagickIfNeeded(void);
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RImage *RLoadMagick(const char *file_name)
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{
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RImage *image = NULL;
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unsigned char *ptr;
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unsigned long w,h;
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MagickWand *m_wand = NULL;
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MagickBooleanType mrc;
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MagickBooleanType hasAlfa;
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PixelWand *bg_wand = NULL;
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if (RInitMagickIfNeeded()) {
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RErrorCode = RERR_BADFORMAT;
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return NULL;
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}
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/* Create a wand */
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m_wand = NewMagickWand();
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/* set the default background as transparent */
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bg_wand = NewPixelWand();
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PixelSetColor(bg_wand, "none");
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MagickSetBackgroundColor(m_wand, bg_wand);
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/* Read the input image */
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if (!MagickReadImage(m_wand, file_name)) {
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RErrorCode = RERR_BADIMAGEFILE;
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goto bye;
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}
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w = MagickGetImageWidth(m_wand);
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h = MagickGetImageHeight(m_wand);
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hasAlfa = MagickGetImageAlphaChannel(m_wand);
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image = RCreateImage(w, h, (unsigned int) hasAlfa);
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if (!image) {
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RErrorCode = RERR_NOMEMORY;
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goto bye;
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}
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ptr = image->data;
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if (hasAlfa == MagickFalse)
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mrc = MagickExportImagePixels(m_wand, 0, 0, (size_t)w, (size_t)h, "RGB", CharPixel, ptr);
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else
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mrc = MagickExportImagePixels(m_wand, 0, 0, (size_t)w, (size_t)h, "RGBA", CharPixel, ptr);
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if (mrc == MagickFalse) {
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RErrorCode = RERR_BADIMAGEFILE;
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RReleaseImage(image);
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image = NULL;
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goto bye;
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}
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bye:
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/* Tidy up */
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DestroyPixelWand(bg_wand);
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MagickClearException(m_wand);
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DestroyMagickWand(m_wand);
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return image;
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}
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/* Track the state of the library in memory */
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static enum {
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MW_NotReady,
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MW_Ready
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} magick_state;
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/*
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* Initialise MagickWand, but only if it was not already done
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*
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* Return ok(0) when MagickWand is usable and fail(!0) if not usable
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*/
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static int RInitMagickIfNeeded(void)
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{
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if (magick_state == MW_NotReady) {
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MagickWandGenesis();
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magick_state = MW_Ready;
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}
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return 0;
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}
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void RReleaseMagick(void)
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{
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if (magick_state == MW_Ready) {
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MagickWandTerminus();
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magick_state = MW_NotReady;
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}
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}
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