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31 \**************************************************************************/
32
33 // FIXME: this image reader is also present in Quarter. If you do any
34 // fixes/changes here you should look into updating the Quarter
35 // version as well. pederb, 2009-02-04
36
37 #include <Inventor/Qt/SoQtImageReader.h>
38 #include <Inventor/SbImage.h>
39 #include <qimage.h>
40
41 #ifdef HAVE_CONFIG_H
42 #include <config.h>
43 #endif // HAVE_CONFIG_H
44
SoQtImageReader(void)45 SoQtImageReader::SoQtImageReader(void)
46 {
47 #if HAVE_SBIMAGE_ADDREADIMAGECB
48 SbImage::addReadImageCB(SoQtImageReader::readImageCB, this);
49 #endif // HAVE_SBIMAGE_ADDREADIMAGECB
50 }
51
~SoQtImageReader(void)52 SoQtImageReader::~SoQtImageReader(void)
53 {
54 #if HAVE_SBIMAGE_ADDREADIMAGECB
55 SbImage::removeReadImageCB(SoQtImageReader::readImageCB, this);
56 #endif // HAVE_SBIMAGE_ADDREADIMAGECB
57 }
58
59 SbBool
readImage(const SbString & filename,SbImage * sbimage) const60 SoQtImageReader::readImage(const SbString & filename, SbImage * sbimage) const
61 {
62 QImage image;
63 if (image.load(filename.getString())) {
64 int c;
65 int w = image.width();
66 int h = image.height();
67
68 // Keep in 8-bits mode if that was what we read
69 if (image.depth() == 8 && image.isGrayscale()) {
70 c = 1;
71 }
72 else {
73 // FIXME: consider if we should detect allGrayscale() and alpha (c = 2)
74 #if QT_VERSION >= 0x040000
75 c = image.hasAlphaChannel() ? 4 : 3;
76 image = image.convertToFormat(image.hasAlphaChannel() ?
77 QImage::Format_ARGB32 : QImage::Format_RGB32);
78 #else
79 c = image.hasAlphaBuffer() ? 4 : 3;
80 image = image.convertDepth(32);
81 #endif
82 }
83
84 SbVec2s size((short) w, (short) h);
85 sbimage->setValue(size, c, NULL);
86 unsigned char * buffer = sbimage->getValue(size, c);
87
88 if (c == 1) {
89 for (int i = 0; i < h; i++) {
90 memcpy(buffer + i*w, image.scanLine(h-(i+1)), w);
91 }
92 }
93 else { // (c == 3 || c == 4)
94 QRgb * bits = (QRgb*) image.bits();
95 for (int y = 0; y < h; y++) {
96 unsigned char * line = &buffer[c*w*(h-(y+1))];
97 for (int x = 0; x < w; x++) {
98 *line++ = qRed(*bits);
99 *line++ = qGreen(*bits);
100 *line++ = qBlue(*bits);
101 if (c == 4) {
102 *line++ = qAlpha(*bits);
103 }
104 bits++;
105 }
106 }
107 }
108 return true;
109 }
110 return false;
111 }
112
113 SbBool
readImageCB(const SbString & filename,SbImage * image,void * closure)114 SoQtImageReader::readImageCB(const SbString & filename, SbImage * image, void * closure)
115 {
116 return ((SoQtImageReader*)closure)->readImage(filename, image);
117 }
118