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Christophe CURIS
ad07a97788
As pointed by Coverity, this value is never used, the assignation has no effect, so Coverity reports that it is unnecessary complexity that is not compatible with code maintainability. Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
124 lines
2.8 KiB
C
124 lines
2.8 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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#include <wand/MagickWand.h>
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#include "wraster.h"
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#include "imgformat.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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