+//------------------------------------------------------------------------
+// DeviceNRecoder
+//------------------------------------------------------------------------
+
+class DeviceNRecoder: public FilterStream {
+public:
+
+ DeviceNRecoder(Stream *strA, int widthA, int heightA,
+ GfxImageColorMap *colorMapA);
+ virtual ~DeviceNRecoder();
+ virtual StreamKind getKind() { return strWeird; }
+ virtual void reset();
+ virtual int getChar()
+ { return (bufIdx >= bufSize && !fillBuf()) ? EOF : buf[bufIdx++]; }
+ virtual int lookChar()
+ { return (bufIdx >= bufSize && !fillBuf()) ? EOF : buf[bufIdx]; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue) { return gTrue; }
+ virtual GBool isEncoder() { return gTrue; }
+
+private:
+
+ GBool fillBuf();
+
+ int width, height;
+ GfxImageColorMap *colorMap;
+ Function *func;
+ ImageStream *imgStr;
+ int buf[gfxColorMaxComps];
+ int pixelIdx;
+ int bufIdx;
+ int bufSize;
+};
+
+DeviceNRecoder::DeviceNRecoder(Stream *strA, int widthA, int heightA,
+ GfxImageColorMap *colorMapA):
+ FilterStream(strA) {
+ width = widthA;
+ height = heightA;
+ colorMap = colorMapA;
+ imgStr = NULL;
+ pixelIdx = 0;
+ bufIdx = gfxColorMaxComps;
+ bufSize = ((GfxDeviceNColorSpace *)colorMap->getColorSpace())->
+ getAlt()->getNComps();
+ func = ((GfxDeviceNColorSpace *)colorMap->getColorSpace())->
+ getTintTransformFunc();
+}
+
+DeviceNRecoder::~DeviceNRecoder() {
+ if (imgStr) {
+ delete imgStr;
+ }
+}
+
+void DeviceNRecoder::reset() {
+ imgStr = new ImageStream(str, width, colorMap->getNumPixelComps(),
+ colorMap->getBits());
+ imgStr->reset();
+}
+
+GBool DeviceNRecoder::fillBuf() {
+ Guchar pixBuf[gfxColorMaxComps];
+ GfxColor color;
+ double y[gfxColorMaxComps];
+ int i;
+
+ if (pixelIdx >= width * height) {
+ return gFalse;
+ }
+ imgStr->getPixel(pixBuf);
+ colorMap->getColor(pixBuf, &color);
+ func->transform(color.c, y);
+ for (i = 0; i < bufSize; ++i) {
+ buf[i] = (int)(y[i] * 255 + 0.5);
+ }
+ bufIdx = 0;
+ ++pixelIdx;
+ return gTrue;
+}
+