int RGBE_WritePixels_RLE(FILE *fp, float *data, int scanline_width, int num_scanlines) { unsigned char rgbe[4]; unsigned char *buffer; int i, err; if ((scanline_width < 8)||(scanline_width > 0x7fff)) /* run length encoding is not allowed so write flat*/ return RGBE_WritePixels(fp,data,scanline_width*num_scanlines); buffer = (unsigned char *)malloc(sizeof(unsigned char)*4*scanline_width); if (buffer == NULL) /* no buffer space so write flat */ return RGBE_WritePixels(fp,data,scanline_width*num_scanlines); while(num_scanlines-- > 0) { rgbe[0] = 2; rgbe[1] = 2; rgbe[2] = scanline_width >> 8; rgbe[3] = scanline_width & 0xFF; if (fwrite(rgbe, sizeof(rgbe), 1, fp) < 1) { free(buffer); return rgbe_error(rgbe_write_error,NULL); } for(i=0; i<scanline_width; i++) { float2rgbe(rgbe,data[RGBE_DATA_RED], data[RGBE_DATA_GREEN],data[RGBE_DATA_BLUE]); buffer[i] = rgbe[0]; buffer[i+scanline_width] = rgbe[1]; buffer[i+2*scanline_width] = rgbe[2]; buffer[i+3*scanline_width] = rgbe[3]; data += RGBE_DATA_SIZE; } /* write out each of the four channels separately run length encoded */ /* first red, then green, then blue, then exponent */ for(i=0; i<4; i++) { if ((err = RGBE_WriteBytes_RLE(fp,&buffer[i*scanline_width], scanline_width)) != RGBE_RETURN_SUCCESS) { free(buffer); return err; } } } free(buffer); return RGBE_RETURN_SUCCESS; }
// Internal function used to save the Hdr. ILboolean iSaveHdrInternal() { ILimage *TempImage; rgbe_header_info stHeader; unsigned char rgbe[4]; ILubyte *buffer; ILfloat *data; ILuint i; ILboolean bRet; if (iCurImage == NULL) { ilSetError(IL_ILLEGAL_OPERATION); return IL_FALSE; } stHeader.exposure = 0; stHeader.gamma = 0; stHeader.programtype[0] = 0; stHeader.valid = 0; if (iCurImage->Format != IL_UNSIGNED_BYTE) { TempImage = iConvertImage(iCurImage, IL_RGB, IL_FLOAT); if (TempImage == NULL) return IL_FALSE; } else TempImage = iCurImage; if (!RGBE_WriteHeader(TempImage->Width, TempImage->Height, &stHeader)) return IL_FALSE; if (TempImage->Origin == IL_ORIGIN_LOWER_LEFT) iFlipBuffer(TempImage->Data,TempImage->Depth,TempImage->Bps,TempImage->Height); data = (ILfloat*)TempImage->Data; if ((TempImage->Width < 8)||(TempImage->Width > 0x7fff)) { /* run length encoding is not allowed so write flat*/ bRet = RGBE_WritePixels(data,TempImage->Width*TempImage->Height); if (iCurImage != TempImage) ilCloseImage(TempImage); return bRet; } buffer = (ILubyte*)ialloc(sizeof(ILubyte)*4*TempImage->Width); if (buffer == NULL) { /* no buffer space so write flat */ bRet = RGBE_WritePixels(data,TempImage->Width*TempImage->Height); if (iCurImage != TempImage) ilCloseImage(TempImage); return bRet; } while(TempImage->Height-- > 0) { rgbe[0] = 2; rgbe[1] = 2; rgbe[2] = TempImage->Width >> 8; rgbe[3] = TempImage->Width & 0xFF; if (iwrite(rgbe, sizeof(rgbe), 1) < 1) { free(buffer); if (iCurImage != TempImage) ilCloseImage(TempImage); return IL_FALSE; } for(i=0;i<TempImage->Width;i++) { float2rgbe(rgbe,data[RGBE_DATA_RED],data[RGBE_DATA_GREEN],data[RGBE_DATA_BLUE]); buffer[i] = rgbe[0]; buffer[i+TempImage->Width] = rgbe[1]; buffer[i+2*TempImage->Width] = rgbe[2]; buffer[i+3*TempImage->Width] = rgbe[3]; data += RGBE_DATA_SIZE; } /* write out each of the four channels separately run length encoded */ /* first red, then green, then blue, then exponent */ for(i=0;i<4;i++) { if (RGBE_WriteBytes_RLE(&buffer[i*TempImage->Width],TempImage->Width) != IL_TRUE) { ifree(buffer); if (iCurImage != TempImage) ilCloseImage(TempImage); return IL_FALSE; } } } ifree(buffer); if (iCurImage != TempImage) ilCloseImage(TempImage); return IL_TRUE; }