/*!
* \brief Draw an image to Dia's _Image
* \todo use maskColors to have some alpha support
*/
void
DiaOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
int width, int height, GfxImageColorMap *colorMap,
GBool interpolate, int *maskColors, GBool inlineImg)
{
DiaObject *obj;
GdkPixbuf *pixbuf;
Point pos;
ObjectChange *change;
double *ctm = state->getCTM();
pos.x = ctm[4] * scale;
// there is some undocumented magic done with the ctm for drawImage
// deduced from SplashOutputDev::drawImage()
// cmt[2] and ctm[3] being negative - use that for y postion
// ctm[0] and ctm[3] have width and height in device coordinates
pos.y = (ctm[5] + ctm[3]) * scale;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, maskColors ? TRUE : FALSE, 8, width, height);
{
// 3 channels, 8 bit
ImageStream imgStr(str, width, colorMap->getNumPixelComps(), colorMap->getBits());
Guchar *line;
int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
guchar *pixels = gdk_pixbuf_get_pixels (pixbuf);
int y;
imgStr.reset(); // otherwise getLine() is crashing right away
line = imgStr.getLine ();
for (y = 0; y < height && line; ++y) {
guchar *dest = pixels + y * rowstride;
colorMap->getRGBLine (line, dest, width);
// ToDo: respect maskColors
line = imgStr.getLine ();
}
}
obj = create_standard_image (pos.x, pos.y,
ctm[0] * scale,
ctm[3] * scale, NULL);
if ((change = dia_object_set_pixbuf (obj, pixbuf)) != NULL)
change->free (change); /* reference transfered */
else
g_object_unref (pixbuf);
addObject (obj);
}
/*!
* \brief Draw an image to Dia's _Image
* \todo use maskColors to have some alpha support
*/
void
DiaOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
int width, int height, GfxImageColorMap *colorMap,
GBool interpolate, int *maskColors, GBool inlineImg)
{
DiaObject *obj;
GdkPixbuf *pixbuf;
Point pos;
ObjectChange *change;
double *ctm = state->getCTM();
pos.x = ctm[4] * scale;
// there is some undocumented magic done with the ctm for drawImage
// deduced from SplashOutputDev::drawImage()
// cmt[2] and ctm[3] being negative - use that for y postion
// ctm[0] and ctm[3] have width and height in device coordinates
pos.y = (ctm[5] + ctm[3]) * scale;
#ifdef USE_IMAGE_CACHE /* bogus: neither 'ref' nor 'str' work as unique key */
// rather than creating the image over and over again we try to cache them
// via the given 'stream' object
if ((pixbuf = static_cast<GdkPixbuf*>(g_hash_table_lookup (this->image_cache, str))) != NULL) {
g_object_ref (pixbuf);
} else {
#endif
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, maskColors ? TRUE : FALSE, 8, width, height);
{
// 3 channels, 8 bit
ImageStream imgStr(str, width, colorMap->getNumPixelComps(), colorMap->getBits());
Guchar *line;
int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
guchar *pixels = gdk_pixbuf_get_pixels (pixbuf);
int y;
imgStr.reset(); // otherwise getLine() is crashing right away
line = imgStr.getLine ();
for (y = 0; y < height && line; ++y) {
guchar *dest = pixels + y * rowstride;
colorMap->getRGBLine (line, dest, width);
if (maskColors) {
for (int x = 0; x < width; x++) {
bool is_opaque = false;
for (int i = 0; i < colorMap->getNumPixelComps(); ++i) {
if (line[i] < maskColors[2*i] ||
line[i] > maskColors[2*i+1]) {
is_opaque = true;
break;
}
}
if (is_opaque)
*dest |= 0xff000000;
else
*dest = 0;
dest++;
line += colorMap->getNumPixelComps();
}
}
line = imgStr.getLine ();
}
}
#ifdef USE_IMAGE_CACHE
// insert the new image into our cache
g_hash_table_insert (this->image_cache, str, g_object_ref (pixbuf));
}
#endif
obj = create_standard_image (pos.x, pos.y,
ctm[0] * scale,
ctm[3] * scale, NULL);
if ((change = dia_object_set_pixbuf (obj, pixbuf)) != NULL) {
change->free (change);
g_free (change);
}
g_object_unref (pixbuf);
addObject (obj);
}
