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Diffstat (limited to 'plugins/FreeImage/src/FreeImageToolkit/Resize.cpp')
| -rw-r--r-- | plugins/FreeImage/src/FreeImageToolkit/Resize.cpp | 656 |
1 files changed, 0 insertions, 656 deletions
diff --git a/plugins/FreeImage/src/FreeImageToolkit/Resize.cpp b/plugins/FreeImage/src/FreeImageToolkit/Resize.cpp deleted file mode 100644 index 5421bd47ab..0000000000 --- a/plugins/FreeImage/src/FreeImageToolkit/Resize.cpp +++ /dev/null @@ -1,656 +0,0 @@ -// ========================================================== -// Upsampling / downsampling classes -// -// Design and implementation by -// - Hervé Drolon (drolon@infonie.fr) -// - Detlev Vendt (detlev.vendt@brillit.de) -// -// This file is part of FreeImage 3 -// -// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY -// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES -// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE -// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED -// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT -// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY -// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL -// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER -// THIS DISCLAIMER. -// -// Use at your own risk! -// ========================================================== - -#include "Resize.h" - -/** - Filter weights table. - This class stores contribution information for an entire line (row or column). -*/ -CWeightsTable::CWeightsTable(CGenericFilter *pFilter, unsigned uDstSize, unsigned uSrcSize) { - unsigned u; - double dWidth; - double dFScale = 1.0; - const double dFilterWidth = pFilter->GetWidth(); - - // scale factor - const double dScale = double(uDstSize) / double(uSrcSize); - - if(dScale < 1.0) { - // minification - dWidth = dFilterWidth / dScale; - dFScale = dScale; - } else { - // magnification - dWidth= dFilterWidth; - } - - // allocate a new line contributions structure - // - // window size is the number of sampled pixels - m_WindowSize = 2 * (int)ceil(dWidth) + 1; - m_LineLength = uDstSize; - // allocate list of contributions - m_WeightTable = (Contribution*)malloc(m_LineLength * sizeof(Contribution)); - for(u = 0 ; u < m_LineLength ; u++) { - // allocate contributions for every pixel - m_WeightTable[u].Weights = (double*)malloc(m_WindowSize * sizeof(double)); - } - - // offset for discrete to continuous coordinate conversion - const double dOffset = (0.5 / dScale) - 0.5; - - - for(u = 0; u < m_LineLength; u++) { - // scan through line of contributions - const double dCenter = (double)u / dScale + dOffset; // reverse mapping - // find the significant edge points that affect the pixel - int iLeft = MAX (0, (int)floor (dCenter - dWidth)); - int iRight = MIN ((int)ceil (dCenter + dWidth), int(uSrcSize) - 1); - - // cut edge points to fit in filter window in case of spill-off - if ((iRight - iLeft + 1) > int(m_WindowSize)) { - if(iLeft < (int(uSrcSize) - 1 / 2)) { - iLeft++; - } else { - iRight--; - } - } - - m_WeightTable[u].Left = iLeft; - m_WeightTable[u].Right = iRight; - - int iSrc = 0; - double dTotalWeight = 0; // zero sum of weights - for(iSrc = iLeft; iSrc <= iRight; iSrc++) { - // calculate weights - const double weight = dFScale * pFilter->Filter(dFScale * (dCenter - (double)iSrc)); - m_WeightTable[u].Weights[iSrc-iLeft] = weight; - dTotalWeight += weight; - } - if ((dTotalWeight > 0) && (dTotalWeight != 1)) { - // normalize weight of neighbouring points - for(iSrc = iLeft; iSrc <= iRight; iSrc++) { - // normalize point - m_WeightTable[u].Weights[iSrc-iLeft] /= dTotalWeight; - } - // simplify the filter, discarding null weights at the right - iSrc = iRight - iLeft; - while(m_WeightTable[u].Weights[iSrc] == 0){ - m_WeightTable[u].Right--; - iSrc--; - if(m_WeightTable[u].Right == m_WeightTable[u].Left) - break; - } - - } - } -} - -CWeightsTable::~CWeightsTable() { - for(unsigned u = 0; u < m_LineLength; u++) { - // free contributions for every pixel - free(m_WeightTable[u].Weights); - } - // free list of pixels contributions - free(m_WeightTable); -} - -// --------------------------------------------- - -/** - CResizeEngine<br> - This class performs filtered zoom. It scales an image to the desired dimensions with - any of the CGenericFilter derived filter class.<br> - It works with 8-, 24- and 32-bit buffers.<br><br> - - <b>References</b> : <br> - [1] Paul Heckbert, C code to zoom raster images up or down, with nice filtering. - UC Berkeley, August 1989. [online] http://www-2.cs.cmu.edu/afs/cs.cmu.edu/Web/People/ph/heckbert.html - [2] Eran Yariv, Two Pass Scaling using Filters. The Code Project, December 1999. - [online] http://www.codeproject.com/bitmap/2_pass_scaling.asp - -*/ - -FIBITMAP* CResizeEngine::scale(FIBITMAP *src, unsigned dst_width, unsigned dst_height) { - unsigned src_width = FreeImage_GetWidth(src); - unsigned src_height = FreeImage_GetHeight(src); - - unsigned redMask = FreeImage_GetRedMask(src); - unsigned greenMask = FreeImage_GetGreenMask(src); - unsigned blueMask = FreeImage_GetBlueMask(src); - - unsigned bpp = FreeImage_GetBPP(src); - if(bpp == 1) { - // convert output to 8-bit - bpp = 8; - } - - FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(src); - - // allocate the dst image - FIBITMAP *dst = FreeImage_AllocateT(image_type, dst_width, dst_height, bpp, redMask, greenMask, blueMask); - if (!dst) return NULL; - - if(bpp == 8) { - if(FreeImage_GetColorType(src) == FIC_MINISWHITE) { - // build an inverted greyscale palette - RGBQUAD *dst_pal = FreeImage_GetPalette(dst); - for(unsigned i = 0; i < 256; i++) { - dst_pal[i].rgbRed = dst_pal[i].rgbGreen = dst_pal[i].rgbBlue = (BYTE)(255 - i); - } - } else { - // build a greyscale palette - RGBQUAD *dst_pal = FreeImage_GetPalette(dst); - for(unsigned i = 0; i < 256; i++) { - dst_pal[i].rgbRed = dst_pal[i].rgbGreen = dst_pal[i].rgbBlue = (BYTE)i; - } - } - } - - /** - Decide which filtering order (xy or yx) is faster for this mapping. - --- The theory --- - Try to minimize calculations by counting the number of convolution multiplies - if(dst_width*src_height <= src_width*dst_height) { - // xy filtering - } else { - // yx filtering - } - --- The practice --- - Try to minimize calculations by counting the number of vertical convolutions (the most time consuming task) - if(dst_width*dst_height <= src_width*dst_height) { - // xy filtering - } else { - // yx filtering - } - */ - - if(dst_width <= src_width) { - // xy filtering - // ------------- - - // allocate a temporary image - FIBITMAP *tmp = FreeImage_AllocateT(image_type, dst_width, src_height, bpp, redMask, greenMask, blueMask); - if (!tmp) { - FreeImage_Unload(dst); - return NULL; - } - - // scale source image horizontally into temporary image - horizontalFilter(src, src_width, src_height, tmp, dst_width, src_height); - - // scale temporary image vertically into result image - verticalFilter(tmp, dst_width, src_height, dst, dst_width, dst_height); - - // free temporary image - FreeImage_Unload(tmp); - - } else { - // yx filtering - // ------------- - - // allocate a temporary image - FIBITMAP *tmp = FreeImage_AllocateT(image_type, src_width, dst_height, bpp, redMask, greenMask, blueMask); - if (!tmp) { - FreeImage_Unload(dst); - return NULL; - } - - // scale source image vertically into temporary image - verticalFilter(src, src_width, src_height, tmp, src_width, dst_height); - - // scale temporary image horizontally into result image - horizontalFilter(tmp, src_width, dst_height, dst, dst_width, dst_height); - - // free temporary image - FreeImage_Unload(tmp); - } - - return dst; -} - - -/// Performs horizontal image filtering -void CResizeEngine::horizontalFilter(FIBITMAP *src, unsigned src_width, unsigned src_height, FIBITMAP *dst, unsigned dst_width, unsigned dst_height) { - if(dst_width == src_width) { - // no scaling required, just copy - switch(FreeImage_GetBPP(src)) { - case 1: - { - if(FreeImage_GetBPP(dst) != 8) break; - for(unsigned y = 0; y < dst_height; y++) { - // convert each row - BYTE *src_bits = FreeImage_GetScanLine(src, y); - BYTE *dst_bits = FreeImage_GetScanLine(dst, y); - FreeImage_ConvertLine1To8(dst_bits, src_bits, dst_width); - } - } - break; - - default: - { - const BYTE *src_bits = FreeImage_GetBits(src); - BYTE *dst_bits = FreeImage_GetBits(dst); - memcpy(dst_bits, src_bits, dst_height * FreeImage_GetPitch(dst)); - } - break; - } - } - else { - - // allocate and calculate the contributions - CWeightsTable weightsTable(m_pFilter, dst_width, src_width); - - // step through rows - switch(FreeImage_GetImageType(src)) { - case FIT_BITMAP: - { - switch(FreeImage_GetBPP(src)) { - case 1: - { - // scale and convert to 8-bit - if(FreeImage_GetBPP(dst) != 8) break; - - for(unsigned y = 0; y < dst_height; y++) { - // scale each row - const BYTE *src_bits = FreeImage_GetScanLine(src, y); - BYTE *dst_bits = FreeImage_GetScanLine(dst, y); - - for(unsigned x = 0; x < dst_width; x++) { - // loop through row - double value = 0; - const unsigned iLeft = weightsTable.getLeftBoundary(x); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(x); // retrieve right boundary - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(x, i-iLeft); - - const BYTE pixel = (src_bits[i >> 3] & (0x80 >> (i & 0x07))) != 0; - value += (weight * (double)pixel); - } - value *= 255; - - // clamp and place result in destination pixel - dst_bits[x] = (BYTE)CLAMP<int>((int)(value + 0.5), 0, 255); - } - } - } - break; - - case 8: - case 24: - case 32: - { - // Calculate the number of bytes per pixel (1 for 8-bit, 3 for 24-bit or 4 for 32-bit) - const unsigned bytespp = FreeImage_GetLine(src) / FreeImage_GetWidth(src); - - for(unsigned y = 0; y < dst_height; y++) { - // scale each row - const BYTE *src_bits = FreeImage_GetScanLine(src, y); - BYTE *dst_bits = FreeImage_GetScanLine(dst, y); - - for(unsigned x = 0; x < dst_width; x++) { - // loop through row - double value[4] = {0, 0, 0, 0}; // 4 = 32 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(x); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(x); // retrieve right boundary - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(x, i-iLeft); - - unsigned index = i * bytespp; // pixel index - for (unsigned j = 0; j < bytespp; j++) { - value[j] += (weight * (double)src_bits[index++]); - } - } - - // clamp and place result in destination pixel - for (unsigned j = 0; j < bytespp; j++) { - dst_bits[j] = (BYTE)CLAMP<int>((int)(value[j] + 0.5), 0, 0xFF); - } - - dst_bits += bytespp; - } - } - } - break; - } - } - break; - - case FIT_UINT16: - case FIT_RGB16: - case FIT_RGBA16: - { - // Calculate the number of words per pixel (1 for 16-bit, 3 for 48-bit or 4 for 64-bit) - const unsigned wordspp = (FreeImage_GetLine(src) / FreeImage_GetWidth(src)) / sizeof(WORD); - - for(unsigned y = 0; y < dst_height; y++) { - // scale each row - const WORD *src_bits = (WORD*)FreeImage_GetScanLine(src, y); - WORD *dst_bits = (WORD*)FreeImage_GetScanLine(dst, y); - - for(unsigned x = 0; x < dst_width; x++) { - // loop through row - double value[4] = {0, 0, 0, 0}; // 4 = 64 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(x); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(x); // retrieve right boundary - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(x, i-iLeft); - - unsigned index = i * wordspp; // pixel index - for (unsigned j = 0; j < wordspp; j++) { - value[j] += (weight * (double)src_bits[index++]); - } - } - - // clamp and place result in destination pixel - for (unsigned j = 0; j < wordspp; j++) { - dst_bits[j] = (WORD)CLAMP<int>((int)(value[j] + 0.5), 0, 0xFFFF); - } - - dst_bits += wordspp; - } - } - } - break; - - case FIT_FLOAT: - case FIT_RGBF: - case FIT_RGBAF: - { - // Calculate the number of floats per pixel (1 for 32-bit, 3 for 96-bit or 4 for 128-bit) - const unsigned floatspp = (FreeImage_GetLine(src) / FreeImage_GetWidth(src)) / sizeof(float); - - for(unsigned y = 0; y < dst_height; y++) { - // scale each row - const float *src_bits = (float*)FreeImage_GetScanLine(src, y); - float *dst_bits = (float*)FreeImage_GetScanLine(dst, y); - - for(unsigned x = 0; x < dst_width; x++) { - // loop through row - double value[4] = {0, 0, 0, 0}; // 4 = 128 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(x); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(x); // retrieve right boundary - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(x, i-iLeft); - - unsigned index = i * floatspp; // pixel index - for (unsigned j = 0; j < floatspp; j++) { - value[j] += (weight * (double)src_bits[index++]); - } - } - - // place result in destination pixel - for (unsigned j = 0; j < floatspp; j++) { - dst_bits[j] = (float)value[j]; - } - - dst_bits += floatspp; - } - } - } - break; - - } - } -} - -/// Performs vertical image filtering -void CResizeEngine::verticalFilter(FIBITMAP *src, unsigned src_width, unsigned src_height, FIBITMAP *dst, unsigned dst_width, unsigned dst_height) { - if(src_height == dst_height) { - // no scaling required, just copy - switch(FreeImage_GetBPP(src)) { - case 1: - { - if(FreeImage_GetBPP(dst) != 8) break; - for(unsigned y = 0; y < dst_height; y++) { - // convert each row - BYTE *src_bits = FreeImage_GetScanLine(src, y); - BYTE *dst_bits = FreeImage_GetScanLine(dst, y); - FreeImage_ConvertLine1To8(dst_bits, src_bits, dst_width); - } - } - break; - - default: - { - const BYTE *src_bits = FreeImage_GetBits(src); - BYTE *dst_bits = FreeImage_GetBits(dst); - memcpy(dst_bits, src_bits, dst_height * FreeImage_GetPitch(dst)); - } - break; - } - - } - else { - - // allocate and calculate the contributions - CWeightsTable weightsTable(m_pFilter, dst_height, src_height); - - // step through columns - switch(FreeImage_GetImageType(src)) { - case FIT_BITMAP: - { - switch(FreeImage_GetBPP(src)) { - case 1: - { - // scale and convert to 8-bit - if(FreeImage_GetBPP(dst) != 8) break; - - const unsigned src_pitch = FreeImage_GetPitch(src); - const unsigned dst_pitch = FreeImage_GetPitch(dst); - - for(unsigned x = 0; x < dst_width; x++) { - - // work on column x in dst - BYTE *dst_bits = FreeImage_GetBits(dst) + x; - - // scale each column - for(unsigned y = 0; y < dst_height; y++) { - // loop through column - double value = 0; - const unsigned iLeft = weightsTable.getLeftBoundary(y); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(y); // retrieve right boundary - - BYTE *src_bits = FreeImage_GetScanLine(src, iLeft); - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(y, i-iLeft); - - const BYTE pixel = (src_bits[x >> 3] & (0x80 >> (x & 0x07))) != 0; - value += (weight * (double)pixel); - - src_bits += src_pitch; - } - value *= 255; - - // clamp and place result in destination pixel - *dst_bits = (BYTE)CLAMP<int>((int)(value + 0.5), 0, 0xFF); - - dst_bits += dst_pitch; - } - } - } - break; - - case 8: - case 24: - case 32: - { - // Calculate the number of bytes per pixel (1 for 8-bit, 3 for 24-bit or 4 for 32-bit) - const unsigned bytespp = FreeImage_GetLine(src) / FreeImage_GetWidth(src); - - const unsigned src_pitch = FreeImage_GetPitch(src); - const unsigned dst_pitch = FreeImage_GetPitch(dst); - - for(unsigned x = 0; x < dst_width; x++) { - const unsigned index = x * bytespp; // pixel index - - // work on column x in dst - BYTE *dst_bits = FreeImage_GetBits(dst) + index; - - // scale each column - for(unsigned y = 0; y < dst_height; y++) { - // loop through column - double value[4] = {0, 0, 0, 0}; // 4 = 32 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(y); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(y); // retrieve right boundary - - const BYTE *src_bits = FreeImage_GetScanLine(src, iLeft) + index; - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(y, i-iLeft); - for (unsigned j = 0; j < bytespp; j++) { - value[j] += (weight * (double)src_bits[j]); - } - - src_bits += src_pitch; - } - - // clamp and place result in destination pixel - for (unsigned j = 0; j < bytespp; j++) { - dst_bits[j] = (BYTE)CLAMP<int>((int)(value[j] + 0.5), 0, 0xFF); - } - - dst_bits += dst_pitch; - } - } - } - break; - } - } - break; - - case FIT_UINT16: - case FIT_RGB16: - case FIT_RGBA16: - { - // Calculate the number of words per pixel (1 for 16-bit, 3 for 48-bit or 4 for 64-bit) - const unsigned wordspp = (FreeImage_GetLine(src) / FreeImage_GetWidth(src)) / sizeof(WORD); - - const unsigned src_pitch = FreeImage_GetPitch(src) / sizeof(WORD); - const unsigned dst_pitch = FreeImage_GetPitch(dst) / sizeof(WORD); - - for(unsigned x = 0; x < dst_width; x++) { - const unsigned index = x * wordspp; // pixel index - - // work on column x in dst - WORD *dst_bits = (WORD*)FreeImage_GetBits(dst) + index; - - // scale each column - for(unsigned y = 0; y < dst_height; y++) { - // loop through column - double value[4] = {0, 0, 0, 0}; // 4 = 64 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(y); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(y); // retrieve right boundary - - const WORD *src_bits = (WORD*)FreeImage_GetScanLine(src, iLeft) + index; - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(y, i-iLeft); - for (unsigned j = 0; j < wordspp; j++) { - value[j] += (weight * (double)src_bits[j]); - } - - src_bits += src_pitch; - } - - // clamp and place result in destination pixel - for (unsigned j = 0; j < wordspp; j++) { - dst_bits[j] = (WORD)CLAMP<int>((int)(value[j] + 0.5), 0, 0xFFFF); - } - - dst_bits += dst_pitch; - } - } - } - break; - - case FIT_FLOAT: - case FIT_RGBF: - case FIT_RGBAF: - { - // Calculate the number of floats per pixel (1 for 32-bit, 3 for 96-bit or 4 for 128-bit) - const unsigned floatspp = (FreeImage_GetLine(src) / FreeImage_GetWidth(src)) / sizeof(float); - - const unsigned src_pitch = FreeImage_GetPitch(src) / sizeof(float); - const unsigned dst_pitch = FreeImage_GetPitch(dst) / sizeof(float); - - for(unsigned x = 0; x < dst_width; x++) { - const unsigned index = x * floatspp; // pixel index - - // work on column x in dst - float *dst_bits = (float*)FreeImage_GetBits(dst) + index; - - // scale each column - for(unsigned y = 0; y < dst_height; y++) { - // loop through column - double value[4] = {0, 0, 0, 0}; // 4 = 128 bpp max - const unsigned iLeft = weightsTable.getLeftBoundary(y); // retrieve left boundary - const unsigned iRight = weightsTable.getRightBoundary(y); // retrieve right boundary - - const float *src_bits = (float*)FreeImage_GetScanLine(src, iLeft) + index; - - for(unsigned i = iLeft; i <= iRight; i++) { - // scan between boundaries - // accumulate weighted effect of each neighboring pixel - const double weight = weightsTable.getWeight(y, i-iLeft); - for (unsigned j = 0; j < floatspp; j++) { - value[j] += (weight * (double)src_bits[j]); - } - - src_bits += src_pitch; - } - - // clamp and place result in destination pixel - for (unsigned j = 0; j < floatspp; j++) { - dst_bits[j] = (float)value[j]; - } - - dst_bits += dst_pitch; - } - } - } - break; - - } - } -} - |