diff options
Diffstat (limited to 'indra/llimage')
| -rwxr-xr-x | indra/llimage/CMakeLists.txt | 2 | ||||
| -rwxr-xr-x | indra/llimage/llimage.cpp | 80 | ||||
| -rwxr-xr-x | indra/llimage/llimage.h | 3 | ||||
| -rwxr-xr-x | indra/llimage/llimagefilter.cpp | 939 | ||||
| -rwxr-xr-x | indra/llimage/llimagefilter.h | 136 |
5 files changed, 1118 insertions, 42 deletions
diff --git a/indra/llimage/CMakeLists.txt b/indra/llimage/CMakeLists.txt index e837b0cac2..293ada7548 100755 --- a/indra/llimage/CMakeLists.txt +++ b/indra/llimage/CMakeLists.txt @@ -27,6 +27,7 @@ set(llimage_SOURCE_FILES llimage.cpp llimagedimensionsinfo.cpp llimagedxt.cpp + llimagefilter.cpp llimagej2c.cpp llimagejpeg.cpp llimagepng.cpp @@ -42,6 +43,7 @@ set(llimage_HEADER_FILES llimagebmp.h llimagedimensionsinfo.h llimagedxt.h + llimagefilter.h llimagej2c.h llimagejpeg.h llimagepng.h diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp index c8a05e1fae..18e08b94a6 100755 --- a/indra/llimage/llimage.cpp +++ b/indra/llimage/llimage.cpp @@ -449,18 +449,8 @@ void LLImageRaw::verticalFlip() void LLImageRaw::expandToPowerOfTwo(S32 max_dim, BOOL scale_image) { // Find new sizes - S32 new_width = MIN_IMAGE_SIZE; - S32 new_height = MIN_IMAGE_SIZE; - - while( (new_width < getWidth()) && (new_width < max_dim) ) - { - new_width <<= 1; - } - - while( (new_height < getHeight()) && (new_height < max_dim) ) - { - new_height <<= 1; - } + S32 new_width = expandDimToPowerOfTwo(getWidth(), max_dim); + S32 new_height = expandDimToPowerOfTwo(getHeight(), max_dim); scale( new_width, new_height, scale_image ); } @@ -468,55 +458,61 @@ void LLImageRaw::expandToPowerOfTwo(S32 max_dim, BOOL scale_image) void LLImageRaw::contractToPowerOfTwo(S32 max_dim, BOOL scale_image) { // Find new sizes - S32 new_width = max_dim; - S32 new_height = max_dim; - - while( (new_width > getWidth()) && (new_width > MIN_IMAGE_SIZE) ) - { - new_width >>= 1; - } - - while( (new_height > getHeight()) && (new_height > MIN_IMAGE_SIZE) ) - { - new_height >>= 1; - } + S32 new_width = contractDimToPowerOfTwo(getWidth(), MIN_IMAGE_SIZE); + S32 new_height = contractDimToPowerOfTwo(getHeight(), MIN_IMAGE_SIZE); scale( new_width, new_height, scale_image ); } -void LLImageRaw::biasedScaleToPowerOfTwo(S32 max_dim) +// static +S32 LLImageRaw::biasedDimToPowerOfTwo(S32 curr_dim, S32 max_dim) { // Strong bias towards rounding down (to save bandwidth) // No bias would mean THRESHOLD == 1.5f; - const F32 THRESHOLD = 1.75f; - + const F32 THRESHOLD = 1.75f; + // Find new sizes - S32 larger_w = max_dim; // 2^n >= mWidth - S32 smaller_w = max_dim; // 2^(n-1) <= mWidth - while( (smaller_w > getWidth()) && (smaller_w > MIN_IMAGE_SIZE) ) + S32 larger_dim = max_dim; // 2^n >= curr_dim + S32 smaller_dim = max_dim; // 2^(n-1) <= curr_dim + while( (smaller_dim > curr_dim) && (smaller_dim > MIN_IMAGE_SIZE) ) { - larger_w = smaller_w; - smaller_w >>= 1; + larger_dim = smaller_dim; + smaller_dim >>= 1; } - S32 new_width = ( (F32)getWidth() / smaller_w > THRESHOLD ) ? larger_w : smaller_w; + return ( ((F32)curr_dim / (F32)smaller_dim) > THRESHOLD ) ? larger_dim : smaller_dim; +} +// static +S32 LLImageRaw::expandDimToPowerOfTwo(S32 curr_dim, S32 max_dim) +{ + S32 new_dim = MIN_IMAGE_SIZE; + while( (new_dim < curr_dim) && (new_dim < max_dim) ) + { + new_dim <<= 1; + } + return new_dim; +} - S32 larger_h = max_dim; // 2^m >= mHeight - S32 smaller_h = max_dim; // 2^(m-1) <= mHeight - while( (smaller_h > getHeight()) && (smaller_h > MIN_IMAGE_SIZE) ) +// static +S32 LLImageRaw::contractDimToPowerOfTwo(S32 curr_dim, S32 min_dim) +{ + S32 new_dim = MAX_IMAGE_SIZE; + while( (new_dim > curr_dim) && (new_dim > min_dim) ) { - larger_h = smaller_h; - smaller_h >>= 1; + new_dim >>= 1; } - S32 new_height = ( (F32)getHeight() / smaller_h > THRESHOLD ) ? larger_h : smaller_h; + return new_dim; +} +void LLImageRaw::biasedScaleToPowerOfTwo(S32 max_dim) +{ + // Find new sizes + S32 new_width = biasedDimToPowerOfTwo(getWidth(),max_dim); + S32 new_height = biasedDimToPowerOfTwo(getHeight(),max_dim); scale( new_width, new_height ); } - - - // Calculates (U8)(255*(a/255.f)*(b/255.f) + 0.5f). Thanks, Jim Blinn! inline U8 LLImageRaw::fastFractionalMult( U8 a, U8 b ) { diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h index 2277afc585..c1ba1e3c21 100755 --- a/indra/llimage/llimage.h +++ b/indra/llimage/llimage.h @@ -205,6 +205,9 @@ public: void verticalFlip(); + static S32 biasedDimToPowerOfTwo(S32 curr_dim, S32 max_dim = MAX_IMAGE_SIZE); + static S32 expandDimToPowerOfTwo(S32 curr_dim, S32 max_dim = MAX_IMAGE_SIZE); + static S32 contractDimToPowerOfTwo(S32 curr_dim, S32 min_dim = MIN_IMAGE_SIZE); void expandToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, BOOL scale_image = TRUE); void contractToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, BOOL scale_image = TRUE); void biasedScaleToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE); diff --git a/indra/llimage/llimagefilter.cpp b/indra/llimage/llimagefilter.cpp new file mode 100755 index 0000000000..3d0c488768 --- /dev/null +++ b/indra/llimage/llimagefilter.cpp @@ -0,0 +1,939 @@ +/** + * @file llimagefilter.cpp + * @brief Simple Image Filtering. See https://wiki.lindenlab.com/wiki/SL_Viewer_Image_Filters for complete documentation. + * + * $LicenseInfo:firstyear=2001&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2014, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +#include "linden_common.h" + +#include "llimagefilter.h" + +#include "llmath.h" +#include "v3color.h" +#include "v4coloru.h" +#include "m3math.h" +#include "v3math.h" +#include "llsdserialize.h" +#include "llstring.h" + +//--------------------------------------------------------------------------- +// LLImageFilter +//--------------------------------------------------------------------------- + +LLImageFilter::LLImageFilter(const std::string& file_path) : + mFilterData(LLSD::emptyArray()), + mImage(NULL), + mHistoRed(NULL), + mHistoGreen(NULL), + mHistoBlue(NULL), + mHistoBrightness(NULL), + mStencilBlendMode(STENCIL_BLEND_MODE_BLEND), + mStencilShape(STENCIL_SHAPE_UNIFORM), + mStencilGamma(1.0), + mStencilMin(0.0), + mStencilMax(1.0) +{ + // Load filter description from file + llifstream filter_xml(file_path); + if (filter_xml.is_open()) + { + // Load and parse the file + LLPointer<LLSDParser> parser = new LLSDXMLParser(); + parser->parse(filter_xml, mFilterData, LLSDSerialize::SIZE_UNLIMITED); + filter_xml.close(); + } +} + +LLImageFilter::~LLImageFilter() +{ + mImage = NULL; + ll_aligned_free_16(mHistoRed); + ll_aligned_free_16(mHistoGreen); + ll_aligned_free_16(mHistoBlue); + ll_aligned_free_16(mHistoBrightness); +} + +/* + *TODO + * Rename stencil to mask + * Improve perf: use LUT for alpha blending in uniform case + * Add gradient coloring as a filter + */ + +//============================================================================ +// Apply the filter data to the image passed as parameter +//============================================================================ + +void LLImageFilter::executeFilter(LLPointer<LLImageRaw> raw_image) +{ + mImage = raw_image; + + //std::cout << "Filter : size = " << mFilterData.size() << std::endl; + for (S32 i = 0; i < mFilterData.size(); ++i) + { + std::string filter_name = mFilterData[i][0].asString(); + // Dump out the filter values (for debug) + //std::cout << "Filter : name = " << mFilterData[i][0].asString() << ", params = "; + //for (S32 j = 1; j < mFilterData[i].size(); ++j) + //{ + // std::cout << mFilterData[i][j].asString() << ", "; + //} + //std::cout << std::endl; + + if (filter_name == "stencil") + { + // Get the shape of the stencil, that is how the procedural alpha is computed geometrically + std::string filter_shape = mFilterData[i][1].asString(); + EStencilShape shape = STENCIL_SHAPE_UNIFORM; + if (filter_shape == "uniform") + { + shape = STENCIL_SHAPE_UNIFORM; + } + else if (filter_shape == "gradient") + { + shape = STENCIL_SHAPE_GRADIENT; + } + else if (filter_shape == "vignette") + { + shape = STENCIL_SHAPE_VIGNETTE; + } + else if (filter_shape == "scanlines") + { + shape = STENCIL_SHAPE_SCAN_LINES; + } + // Get the blend mode of the stencil, that is how the effect is blended in the background through the stencil + std::string filter_mode = mFilterData[i][2].asString(); + EStencilBlendMode mode = STENCIL_BLEND_MODE_BLEND; + if (filter_mode == "blend") + { + mode = STENCIL_BLEND_MODE_BLEND; + } + else if (filter_mode == "add") + { + mode = STENCIL_BLEND_MODE_ADD; + } + else if (filter_mode == "add_back") + { + mode = STENCIL_BLEND_MODE_ABACK; + } + else if (filter_mode == "fade") + { + mode = STENCIL_BLEND_MODE_FADE; + } + // Get the float params: mandatory min, max then the optional parameters (4 max) + F32 min = (F32)(mFilterData[i][3].asReal()); + F32 max = (F32)(mFilterData[i][4].asReal()); + F32 params[4] = {0.0, 0.0, 0.0, 0.0}; + for (S32 j = 5; (j < mFilterData[i].size()) && (j < 9); j++) + { + params[j-5] = (F32)(mFilterData[i][j].asReal()); + } + // Set the stencil + setStencil(shape,mode,min,max,params); + } + else if (filter_name == "sepia") + { + filterSepia(); + } + else if (filter_name == "grayscale") + { + filterGrayScale(); + } + else if (filter_name == "saturate") + { + filterSaturate((float)(mFilterData[i][1].asReal())); + } + else if (filter_name == "rotate") + { + filterRotate((float)(mFilterData[i][1].asReal())); + } + else if (filter_name == "gamma") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterGamma((float)(mFilterData[i][1].asReal()),color); + } + else if (filter_name == "colorize") + { + LLColor3 color((float)(mFilterData[i][1].asReal()),(float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal())); + LLColor3 alpha((F32)(mFilterData[i][4].asReal()),(float)(mFilterData[i][5].asReal()),(float)(mFilterData[i][6].asReal())); + filterColorize(color,alpha); + } + else if (filter_name == "contrast") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterContrast((float)(mFilterData[i][1].asReal()),color); + } + else if (filter_name == "brighten") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterBrightness((float)(mFilterData[i][1].asReal()),color); + } + else if (filter_name == "darken") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterBrightness((float)(-mFilterData[i][1].asReal()),color); + } + else if (filter_name == "linearize") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterLinearize((float)(mFilterData[i][1].asReal()),color); + } + else if (filter_name == "posterize") + { + LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal())); + filterEqualize((S32)(mFilterData[i][1].asReal()),color); + } + else if (filter_name == "screen") + { + std::string screen_name = mFilterData[i][1].asString(); + EScreenMode mode = SCREEN_MODE_2DSINE; + if (screen_name == "2Dsine") + { + mode = SCREEN_MODE_2DSINE; + } + else if (screen_name == "line") + { + mode = SCREEN_MODE_LINE; + } + filterScreen(mode,(F32)(mFilterData[i][2].asReal()),(F32)(mFilterData[i][3].asReal())); + } + else if (filter_name == "blur") + { + LLMatrix3 kernel; + for (S32 i = 0; i < NUM_VALUES_IN_MAT3; i++) + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + kernel.mMatrix[i][j] = 1.0; + convolve(kernel,true,false); + } + else if (filter_name == "sharpen") + { + LLMatrix3 kernel; + for (S32 k = 0; k < NUM_VALUES_IN_MAT3; k++) + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + kernel.mMatrix[k][j] = -1.0; + kernel.mMatrix[1][1] = 9.0; + convolve(kernel,false,false); + } + else if (filter_name == "gradient") + { + LLMatrix3 kernel; + for (S32 k = 0; k < NUM_VALUES_IN_MAT3; k++) + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + kernel.mMatrix[k][j] = -1.0; + kernel.mMatrix[1][1] = 8.0; + convolve(kernel,false,true); + } + else if (filter_name == "convolve") + { + LLMatrix3 kernel; + S32 index = 1; + bool normalize = (mFilterData[i][index++].asReal() > 0.0); + bool abs_value = (mFilterData[i][index++].asReal() > 0.0); + for (S32 k = 0; k < NUM_VALUES_IN_MAT3; k++) + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + kernel.mMatrix[k][j] = mFilterData[i][index++].asReal(); + convolve(kernel,normalize,abs_value); + } + else if (filter_name == "colortransform") + { + LLMatrix3 transform; + S32 index = 1; + for (S32 k = 0; k < NUM_VALUES_IN_MAT3; k++) + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + transform.mMatrix[k][j] = mFilterData[i][index++].asReal(); + transform.transpose(); + colorTransform(transform); + } + else + { + llwarns << "Filter unknown, cannot execute filter command : " << filter_name << llendl; + } + } +} + +//============================================================================ +// Filter Primitives +//============================================================================ + +void LLImageFilter::blendStencil(F32 alpha, U8* pixel, U8 red, U8 green, U8 blue) +{ + F32 inv_alpha = 1.0 - alpha; + switch (mStencilBlendMode) + { + case STENCIL_BLEND_MODE_BLEND: + // Classic blend of incoming color with the background image + pixel[VRED] = inv_alpha * pixel[VRED] + alpha * red; + pixel[VGREEN] = inv_alpha * pixel[VGREEN] + alpha * green; + pixel[VBLUE] = inv_alpha * pixel[VBLUE] + alpha * blue; + break; + case STENCIL_BLEND_MODE_ADD: + // Add incoming color to the background image + pixel[VRED] = llclampb(pixel[VRED] + alpha * red); + pixel[VGREEN] = llclampb(pixel[VGREEN] + alpha * green); + pixel[VBLUE] = llclampb(pixel[VBLUE] + alpha * blue); + break; + case STENCIL_BLEND_MODE_ABACK: + // Add back background image to the incoming color + pixel[VRED] = llclampb(inv_alpha * pixel[VRED] + red); + pixel[VGREEN] = llclampb(inv_alpha * pixel[VGREEN] + green); + pixel[VBLUE] = llclampb(inv_alpha * pixel[VBLUE] + blue); + break; + case STENCIL_BLEND_MODE_FADE: + // Fade incoming color to black + pixel[VRED] = alpha * red; + pixel[VGREEN] = alpha * green; + pixel[VBLUE] = alpha * blue; + break; + } +} + +void LLImageFilter::colorCorrect(const U8* lut_red, const U8* lut_green, const U8* lut_blue) +{ + const S32 components = mImage->getComponents(); + llassert( components >= 1 && components <= 4 ); + + S32 width = mImage->getWidth(); + S32 height = mImage->getHeight(); + + U8* dst_data = mImage->getData(); + for (S32 j = 0; j < height; j++) + { + for (S32 i = 0; i < width; i++) + { + // Blend LUT value + blendStencil(getStencilAlpha(i,j), dst_data, lut_red[dst_data[VRED]], lut_green[dst_data[VGREEN]], lut_blue[dst_data[VBLUE]]); + dst_data += components; + } + } +} + +void LLImageFilter::colorTransform(const LLMatrix3 &transform) +{ + const S32 components = mImage->getComponents(); + llassert( components >= 1 && components <= 4 ); + + S32 width = mImage->getWidth(); + S32 height = mImage->getHeight(); + + U8* dst_data = mImage->getData(); + for (S32 j = 0; j < height; j++) + { + for (S32 i = 0; i < width; i++) + { + // Compute transform + LLVector3 src((F32)(dst_data[VRED]),(F32)(dst_data[VGREEN]),(F32)(dst_data[VBLUE])); + LLVector3 dst = src * transform; + dst.clamp(0.0f,255.0f); + + // Blend result + blendStencil(getStencilAlpha(i,j), dst_data, dst.mV[VRED], dst.mV[VGREEN], dst.mV[VBLUE]); + dst_data += components; + } + } +} + +void LLImageFilter::convolve(const LLMatrix3 &kernel, bool normalize, bool abs_value) +{ + const S32 components = mImage->getComponents(); + llassert( components >= 1 && components <= 4 ); + + // Compute normalization factors + F32 kernel_min = 0.0; + F32 kernel_max = 0.0; + for (S32 i = 0; i < NUM_VALUES_IN_MAT3; i++) + { + for (S32 j = 0; j < NUM_VALUES_IN_MAT3; j++) + { + if (kernel.mMatrix[i][j] >= 0.0) + kernel_max += kernel.mMatrix[i][j]; + else + kernel_min += kernel.mMatrix[i][j]; + } + } + if (abs_value) + { + kernel_max = llabs(kernel_max); + kernel_min = llabs(kernel_min); + kernel_max = llmax(kernel_max,kernel_min); + kernel_min = 0.0; + } + F32 kernel_range = kernel_max - kernel_min; + + // Allocate temporary buffers and initialize algorithm's data + S32 width = mImage->getWidth(); + S32 height = mImage->getHeight(); + + U8* dst_data = mImage->getData(); + + S32 buffer_size = width * components; + llassert_always(buffer_size > 0); + std::vector<U8> even_buffer(buffer_size); + std::vector<U8> odd_buffer(buffer_size); + + U8* south_data = dst_data + buffer_size; + U8* east_west_data; + U8* north_data; + + // Line 0 : we set the line to 0 (debatable) + memcpy( &even_buffer[0], dst_data, buffer_size ); /* Flawfinder: ignore */ + for (S32 i = 0; i < width; i++) + { + blendStencil(getStencilAlpha(i,0), dst_data, 0, 0, 0); + dst_data += components; + } + south_data += buffer_size; + + // All other lines + for (S32 j = 1; j < (height-1); j++) + { + // We need to buffer 2 lines. We flip north and east-west (current) to avoid moving too much memory around + if (j % 2) + { + memcpy( &odd_buffer[0], dst_data, buffer_size ); /* Flawfinder: ignore */ + east_west_data = &odd_buffer[0]; + north_data = &even_buffer[0]; + } + else + { + memcpy( &even_buffer[0], dst_data, buffer_size ); /* Flawfinder: ignore */ + east_west_data = &even_buffer[0]; + north_data = &odd_buffer[0]; + } + // First pixel : set to 0 + blendStencil(getStencilAlpha(0,j), dst_data, 0, 0, 0); + dst_data += components; + // Set pointers to kernel + U8* NW = north_data; + U8* N = NW+components; + U8* NE = N+components; + U8* W = east_west_data; + U8* C = W+components; + U8* E = C+components; + U8* SW = south_data; + U8* S = SW+components; + U8* SE = S+components; + // All other pixels + for (S32 i = 1; i < (width-1); i++) + { + // Compute convolution + LLVector3 dst; + dst.mV[VRED] = (kernel.mMatrix[0][0]*NW[VRED] + kernel.mMatrix[0][1]*N[VRED] + kernel.mMatrix[0][2]*NE[VRED] + + kernel.mMatrix[1][0]*W[VRED] + kernel.mMatrix[1][1]*C[VRED] + kernel.mMatrix[1][2]*E[VRED] + + kernel.mMatrix[2][0]*SW[VRED] + kernel.mMatrix[2][1]*S[VRED] + kernel.mMatrix[2][2]*SE[VRED]); + dst.mV[VGREEN] = (kernel.mMatrix[0][0]*NW[VGREEN] + kernel.mMatrix[0][1]*N[VGREEN] + kernel.mMatrix[0][2]*NE[VGREEN] + + kernel.mMatrix[1][0]*W[VGREEN] + kernel.mMatrix[1][1]*C[VGREEN] + kernel.mMatrix[1][2]*E[VGREEN] + + kernel.mMatrix[2][0]*SW[VGREEN] + kernel.mMatrix[2][1]*S[VGREEN] + kernel.mMatrix[2][2]*SE[VGREEN]); + dst.mV[VBLUE] = (kernel.mMatrix[0][0]*NW[VBLUE] + kernel.mMatrix[0][1]*N[VBLUE] + kernel.mMatrix[0][2]*NE[VBLUE] + + kernel.mMatrix[1][0]*W[VBLUE] + kernel.mMatrix[1][1]*C[VBLUE] + kernel.mMatrix[1][2]*E[VBLUE] + + kernel.mMatrix[2][0]*SW[VBLUE] + kernel.mMatrix[2][1]*S[VBLUE] + kernel.mMatrix[2][2]*SE[VBLUE]); + if (abs_value) + { + dst.mV[VRED] = llabs(dst.mV[VRED]); + dst.mV[VGREEN] = llabs(dst.mV[VGREEN]); + dst.mV[VBLUE] = llabs(dst.mV[VBLUE]); + } + if (normalize) + { + dst.mV[VRED] = (dst.mV[VRED] - kernel_min)/kernel_range; + dst.mV[VGREEN] = (dst.mV[VGREEN] - kernel_min)/kernel_range; + dst.mV[VBLUE] = (dst.mV[VBLUE] - kernel_min)/kernel_range; + } + dst.clamp(0.0f,255.0f); + + // Blend result + blendStencil(getStencilAlpha(i,j), dst_data, dst.mV[VRED], dst.mV[VGREEN], dst.mV[VBLUE]); + + // Next pixel + dst_data += components; + NW += components; + N += components; + NE += components; + W += components; + C += components; + E += components; + SW += components; + S += components; + SE += components; + } + // Last pixel : set to 0 + blendStencil(getStencilAlpha(width-1,j), dst_data, 0, 0, 0); + dst_data += components; + south_data += buffer_size; + } + + // Last line + for (S32 i = 0; i < width; i++) + { + blendStencil(getStencilAlpha(i,0), dst_data, 0, 0, 0); + dst_data += components; + } +} + +void LLImageFilter::filterScreen(EScreenMode mode, const F32 wave_length, const F32 angle) +{ + const S32 components = mImage->getComponents(); + llassert( components >= 1 && components <= 4 ); + + S32 width = mImage->getWidth(); + S32 height = mImage->getHeight(); + + F32 wave_length_pixels = wave_length * (F32)(height) / 2.0; + F32 sin = sinf(angle*DEG_TO_RAD); + F32 cos = cosf(angle*DEG_TO_RAD); + + // Precompute the gamma table : gives us the gray level to use when cutting outside the screen (prevents strong aliasing on the screen) + U8 gamma[256]; + for (S32 i = 0; i < 256; i++) + { + F32 gamma_i = llclampf((float)(powf((float)(i)/255.0,1.0/4.0))); + gamma[i] = (U8)(255.0 * gamma_i); + } + + U8* dst_data = mImage->getData(); + for (S32 j = 0; j < height; j++) + { + for (S32 i = 0; i < width; i++) + { + // Compute screen value + F32 value = 0.0; + F32 di = 0.0; + F32 dj = 0.0; + switch (mode) + { + case SCREEN_MODE_2DSINE: + di = cos*i + sin*j; + dj = -sin*i + cos*j; + value = (sinf(2*F_PI*di/wave_length_pixels)*sinf(2*F_PI*dj/wave_length_pixels)+1.0)*255.0/2.0; + break; + case SCREEN_MODE_LINE: + dj = sin*i - cos*j; + value = (sinf(2*F_PI*dj/wave_length_pixels)+1.0)*255.0/2.0; + break; + } + U8 dst_value = (dst_data[VRED] >= (U8)(value) ? gamma[dst_data[VRED] - (U8)(value)] : 0); + + // Blend result + blendStencil(getStencilAlpha(i,j), dst_data, dst_value, dst_value, dst_value); + dst_data += components; + } + } +} + +//============================================================================ +// Procedural Stencils +//============================================================================ +void LLImageFilter::setStencil(EStencilShape shape, EStencilBlendMode mode, F32 min, F32 max, F32* params) +{ + mStencilShape = shape; + mStencilBlendMode = mode; + mStencilMin = llmin(llmax(min, -1.0f), 1.0f); + mStencilMax = llmin(llmax(max, -1.0f), 1.0f); + + // Each shape will interpret the 4 params differenly. + // We compute each systematically, though, clearly, values are meaningless when the shape doesn't correspond to the parameters + mStencilCenterX = (S32)(mImage->getWidth() + params[0] * (F32)(mImage->getHeight()))/2; + mStencilCenterY = (S32)(mImage->getHeight() + params[1] * (F32)(mImage->getHeight()))/2; + mStencilWidth = (S32)(params[2] * (F32)(mImage->getHeight()))/2; + mStencilGamma = (params[3] <= 0.0 ? 1.0 : params[3]); + + mStencilWavelength = (params[0] <= 0.0 ? 10.0 : params[0] * (F32)(mImage->getHeight()) / 2.0); + mStencilSine = sinf(params[1]*DEG_TO_RAD); + mStencilCosine = cosf(params[1]*DEG_TO_RAD); + + mStencilStartX = ((F32)(mImage->getWidth()) + params[0] * (F32)(mImage->getHeight()))/2.0; + mStencilStartY = ((F32)(mImage->getHeight()) + params[1] * (F32)(mImage->getHeight()))/2.0; + F32 end_x = ((F32)(mImage->getWidth()) + params[2] * (F32)(mImage->getHeight()))/2.0; + F32 end_y = ((F32)(mImage->getHeight()) + params[3] * (F32)(mImage->getHeight()))/2.0; + mStencilGradX = end_x - mStencilStartX; + mStencilGradY = end_y - mStencilStartY; + mStencilGradN = mStencilGradX*mStencilGradX + mStencilGradY*mStencilGradY; +} + +F32 LLImageFilter::getStencilAlpha(S32 i, S32 j) +{ + F32 alpha = 1.0; // That init actually takes care of the STENCIL_SHAPE_UNIFORM case... + if (mStencilShape == STENCIL_SHAPE_VIGNETTE) + { + // alpha is a modified gaussian value, with a center and fading in a circular pattern toward the edges + // The gamma parameter controls the intensity of the drop down from alpha 1.0 (center) to 0.0 + F32 d_center_square = (i - mStencilCenterX)*(i - mStencilCenterX) + (j - mStencilCenterY)*(j - mStencilCenterY); + alpha = powf(F_E, -(powf((d_center_square/(mStencilWidth*mStencilWidth)),mStencilGamma)/2.0f)); + } + else if (mStencilShape == STENCIL_SHAPE_SCAN_LINES) + { + // alpha varies according to a squared sine function. + F32 d = mStencilSine*i - mStencilCosine*j; + alpha = (sinf(2*F_PI*d/mStencilWavelength) > 0.0 ? 1.0 : 0.0); + } + else if (mStencilShape == STENCIL_SHAPE_GRADIENT) + { + alpha = (((F32)(i) - mStencilStartX)*mStencilGradX + ((F32)(j) - mStencilStartY)*mStencilGradY) / mStencilGradN; + alpha = llclampf(alpha); + } + + // We rescale alpha between min and max + return (mStencilMin + alpha * (mStencilMax - mStencilMin)); +} + +//============================================================================ +// Histograms +//============================================================================ + +U32* LLImageFilter::getBrightnessHistogram() +{ + if (!mHistoBrightness) + { + computeHistograms(); + } + return mHistoBrightness; +} + +void LLImageFilter::computeHistograms() +{ + const S32 components = mImage->getComponents(); + llassert( components >= 1 && components <= 4 ); + + // Allocate memory for the histograms + if (!mHistoRed) + { + mHistoRed = (U32*) ll_aligned_malloc_16(256*sizeof(U32)); + } + if (!mHistoGreen) + { + mHistoGreen = (U32*) ll_aligned_malloc_16(256*sizeof(U32)); + } + if (!mHistoBlue) + { + mHistoBlue = (U32*) ll_aligned_malloc_16(256*sizeof(U32)); + } + if (!mHistoBrightness) + { + mHistoBrightness = (U32*) ll_aligned_malloc_16(256*sizeof(U32)); + } + + // Initialize them + for (S32 i = 0; i < 256; i++) + { + mHistoRed[i] = 0; + mHistoGreen[i] = 0; + mHistoBlue[i] = 0; + mHistoBrightness[i] = 0; + } + + // Compute them + S32 pixels = mImage->getWidth() * mImage->getHeight(); + U8* dst_data = mImage->getData(); + for (S32 i = 0; i < pixels; i++) + { + mHistoRed[dst_data[VRED]]++; + mHistoGreen[dst_data[VGREEN]]++; + mHistoBlue[dst_data[VBLUE]]++; + // Note: this is a very simple shorthand for brightness but it's OK for our use + S32 brightness = ((S32)(dst_data[VRED]) + (S32)(dst_data[VGREEN]) + (S32)(dst_data[VBLUE])) / 3; + mHistoBrightness[brightness]++; + // next pixel... + dst_data += components; + } +} + +//============================================================================ +// Secondary Filters +//============================================================================ + +void LLImageFilter::filterGrayScale() +{ + LLMatrix3 gray_scale; + LLVector3 luminosity(0.2125, 0.7154, 0.0721); + gray_scale.setRows(luminosity, luminosity, luminosity); + gray_scale.transpose(); + colorTransform(gray_scale); +} + +void LLImageFilter::filterSepia() +{ + LLMatrix3 sepia; + sepia.setRows(LLVector3(0.3588, 0.7044, 0.1368), + LLVector3(0.2990, 0.5870, 0.1140), + LLVector3(0.2392, 0.4696, 0.0912)); + sepia.transpose(); + colorTransform(sepia); +} + +void LLImageFilter::filterSaturate(F32 saturation) +{ + // Matrix to Lij + LLMatrix3 r_a; + LLMatrix3 r_b; + + // 45 degre rotation around z + r_a.setRows(LLVector3( OO_SQRT2, OO_SQRT2, 0.0), + LLVector3(-OO_SQRT2, OO_SQRT2, 0.0), + LLVector3( 0.0, 0.0, 1.0)); + // 54.73 degre rotation around y + float oo_sqrt3 = 1.0f / F_SQRT3; + float sin_54 = F_SQRT2 * oo_sqrt3; + r_b.setRows(LLVector3(oo_sqrt3, 0.0, -sin_54), + LLVector3(0.0, 1.0, 0.0), + LLVector3(sin_54, 0.0, oo_sqrt3)); + + // Coordinate conversion + LLMatrix3 Lij = r_b * r_a; + LLMatrix3 Lij_inv = Lij; + Lij_inv.transpose(); + + // Local saturation transform + LLMatrix3 s; + s.setRows(LLVector3(saturation, 0.0, 0.0), + LLVector3(0.0, saturation, 0.0), + LLVector3(0.0, 0.0, 1.0)); + + // Global saturation transform + LLMatrix3 transfo = Lij_inv * s * Lij; + colorTransform(transfo); +} + +void LLImageFilter::filterRotate(F32 angle) +{ + // Matrix to Lij + LLMatrix3 r_a; + LLMatrix3 r_b; + + // 45 degre rotation around z + r_a.setRows(LLVector3( OO_SQRT2, OO_SQRT2, 0.0), + LLVector3(-OO_SQRT2, OO_SQRT2, 0.0), + LLVector3( 0.0, 0.0, 1.0)); + // 54.73 degre rotation around y + float oo_sqrt3 = 1.0f / F_SQRT3; + float sin_54 = F_SQRT2 * oo_sqrt3; + r_b.setRows(LLVector3(oo_sqrt3, 0.0, -sin_54), + LLVector3(0.0, 1.0, 0.0), + LLVector3(sin_54, 0.0, oo_sqrt3)); + + // Coordinate conversion + LLMatrix3 Lij = r_b * r_a; + LLMatrix3 Lij_inv = Lij; + Lij_inv.transpose(); + + // Local color rotation transform + LLMatrix3 r; + angle *= DEG_TO_RAD; + r.setRows(LLVector3( cosf(angle), sinf(angle), 0.0), + LLVector3(-sinf(angle), cosf(angle), 0.0), + LLVector3( 0.0, 0.0, 1.0)); + + // Global color rotation transform + LLMatrix3 transfo = Lij_inv * r * Lij; + colorTransform(transfo); +} + +void LLImageFilter::filterGamma(F32 gamma, const LLColor3& alpha) +{ + U8 gamma_red_lut[256]; + U8 gamma_green_lut[256]; + U8 gamma_blue_lut[256]; + + for (S32 i = 0; i < 256; i++) + { + F32 gamma_i = llclampf((float)(powf((float)(i)/255.0,1.0/gamma))); + // Blend in with alpha values + gamma_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * 255.0 * gamma_i); + gamma_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * 255.0 * gamma_i); + gamma_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * 255.0 * gamma_i); + } + + colorCorrect(gamma_red_lut,gamma_green_lut,gamma_blue_lut); +} + +void LLImageFilter::filterLinearize(F32 tail, const LLColor3& alpha) +{ + // Get the histogram + U32* histo = getBrightnessHistogram(); + + // Compute cumulated histogram + U32 cumulated_histo[256]; + cumulated_histo[0] = histo[0]; + for (S32 i = 1; i < 256; i++) + { + cumulated_histo[i] = cumulated_histo[i-1] + histo[i]; + } + + // Compute min and max counts minus tail + tail = llclampf(tail); + S32 total = cumulated_histo[255]; + S32 min_c = (S32)((F32)(total) * tail); + S32 max_c = (S32)((F32)(total) * (1.0 - tail)); + + // Find min and max values + S32 min_v = 0; + while (cumulated_histo[min_v] < min_c) + { + min_v++; + } + S32 max_v = 255; + while (cumulated_histo[max_v] > max_c) + { + max_v--; + } + + // Compute linear lookup table + U8 linear_red_lut[256]; + U8 linear_green_lut[256]; + U8 linear_blue_lut[256]; + if (max_v == min_v) + { + // Degenerated binary split case + for (S32 i = 0; i < 256; i++) + { + U8 value_i = (i < min_v ? 0 : 255); + // Blend in with alpha values + linear_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * value_i); + linear_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * value_i); + linear_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * value_i); + } + } + else + { + // Linearize between min and max + F32 slope = 255.0 / (F32)(max_v - min_v); + F32 translate = -min_v * slope; + for (S32 i = 0; i < 256; i++) + { + U8 value_i = (U8)(llclampb((S32)(slope*i + translate))); + // Blend in with alpha values + linear_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * value_i); + linear_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * value_i); + linear_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * value_i); + } + } + + // Apply lookup table + colorCorrect(linear_red_lut,linear_green_lut,linear_blue_lut); +} + +void LLImageFilter::filterEqualize(S32 nb_classes, const LLColor3& alpha) +{ + // Regularize the parameter: must be between 2 and 255 + nb_classes = llmax(nb_classes,2); + nb_classes = llclampb(nb_classes); + + // Get the histogram + U32* histo = getBrightnessHistogram(); + + // Compute cumulated histogram + U32 cumulated_histo[256]; + cumulated_histo[0] = histo[0]; + for (S32 i = 1; i < 256; i++) + { + cumulated_histo[i] = cumulated_histo[i-1] + histo[i]; + } + + // Compute deltas + S32 total = cumulated_histo[255]; + S32 delta_count = total / nb_classes; + S32 current_count = delta_count; + S32 delta_value = 256 / (nb_classes - 1); + S32 current_value = 0; + + // Compute equalized lookup table + U8 equalize_red_lut[256]; + U8 equalize_green_lut[256]; + U8 equalize_blue_lut[256]; + for (S32 i = 0; i < 256; i++) + { + // Blend in current_value with alpha values + equalize_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * current_value); + equalize_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * current_value); + equalize_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * current_value); + if (cumulated_histo[i] >= current_count) + { + current_count += delta_count; + current_value += delta_value; + current_value = llclampb(current_value); + } + } + + // Apply lookup table + colorCorrect(equalize_red_lut,equalize_green_lut,equalize_blue_lut); +} + +void LLImageFilter::filterColorize(const LLColor3& color, const LLColor3& alpha) +{ + U8 red_lut[256]; + U8 green_lut[256]; + U8 blue_lut[256]; + + F32 red_composite = 255.0 * alpha.mV[0] * color.mV[0]; + F32 green_composite = 255.0 * alpha.mV[1] * color.mV[1]; + F32 blue_composite = 255.0 * alpha.mV[2] * color.mV[2]; + + for (S32 i = 0; i < 256; i++) + { + red_lut[i] = (U8)(llclampb((S32)((1.0 - alpha.mV[0]) * (F32)(i) + red_composite))); + green_lut[i] = (U8)(llclampb((S32)((1.0 - alpha.mV[1]) * (F32)(i) + green_composite))); + blue_lut[i] = (U8)(llclampb((S32)((1.0 - alpha.mV[2]) * (F32)(i) + blue_composite))); + } + + colorCorrect(red_lut,green_lut,blue_lut); +} + +void LLImageFilter::filterContrast(F32 slope, const LLColor3& alpha) +{ + U8 contrast_red_lut[256]; + U8 contrast_green_lut[256]; + U8 contrast_blue_lut[256]; + + F32 translate = 128.0 * (1.0 - slope); + + for (S32 i = 0; i < 256; i++) + { + U8 value_i = (U8)(llclampb((S32)(slope*i + translate))); + // Blend in with alpha values + contrast_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * value_i); + contrast_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * value_i); + contrast_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * value_i); + } + + colorCorrect(contrast_red_lut,contrast_green_lut,contrast_blue_lut); +} + +void LLImageFilter::filterBrightness(F32 add, const LLColor3& alpha) +{ + U8 brightness_red_lut[256]; + U8 brightness_green_lut[256]; + U8 brightness_blue_lut[256]; + + S32 add_value = (S32)(add * 255.0); + + for (S32 i = 0; i < 256; i++) + { + U8 value_i = (U8)(llclampb(i + add_value)); + // Blend in with alpha values + brightness_red_lut[i] = (U8)((1.0 - alpha.mV[0]) * (float)(i) + alpha.mV[0] * value_i); + brightness_green_lut[i] = (U8)((1.0 - alpha.mV[1]) * (float)(i) + alpha.mV[1] * value_i); + brightness_blue_lut[i] = (U8)((1.0 - alpha.mV[2]) * (float)(i) + alpha.mV[2] * value_i); + } + + colorCorrect(brightness_red_lut,brightness_green_lut,brightness_blue_lut); +} + +//============================================================================ diff --git a/indra/llimage/llimagefilter.h b/indra/llimage/llimagefilter.h new file mode 100755 index 0000000000..0f1cbc3fb8 --- /dev/null +++ b/indra/llimage/llimagefilter.h @@ -0,0 +1,136 @@ +/** + * @file llimagefilter.h + * @brief Simple Image Filtering. See https://wiki.lindenlab.com/wiki/SL_Viewer_Image_Filters for complete documentation. + * + * $LicenseInfo:firstyear=2000&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2014, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +#ifndef LL_LLIMAGEFILTER_H +#define LL_LLIMAGEFILTER_H + +#include "llimage.h" + +class LLImageRaw; +class LLColor4U; +class LLColor3; +class LLMatrix3; + +typedef enum e_stencil_blend_mode +{ + STENCIL_BLEND_MODE_BLEND = 0, + STENCIL_BLEND_MODE_ADD = 1, + STENCIL_BLEND_MODE_ABACK = 2, + STENCIL_BLEND_MODE_FADE = 3 +} EStencilBlendMode; + +typedef enum e_stencil_shape +{ + STENCIL_SHAPE_UNIFORM = 0, + STENCIL_SHAPE_GRADIENT = 1, + STENCIL_SHAPE_VIGNETTE = 2, + STENCIL_SHAPE_SCAN_LINES = 3 +} EStencilShape; + +typedef enum e_screen_mode +{ + SCREEN_MODE_2DSINE = 0, + SCREEN_MODE_LINE = 1 +} EScreenMode; + +//============================================================================ +// LLImageFilter +//============================================================================ + +class LLImageFilter +{ +public: + LLImageFilter(const std::string& file_path); + ~LLImageFilter(); + + void executeFilter(LLPointer<LLImageRaw> raw_image); + +private: + // Filter Operations : Transforms + void filterGrayScale(); // Convert to grayscale + void filterSepia(); // Convert to sepia + void filterSaturate(F32 saturation); // < 1.0 desaturates, > 1.0 saturates + void filterRotate(F32 angle); // Rotates hue according to angle, angle in degrees + + // Filter Operations : Color Corrections + // When specified, the LLColor3 alpha parameter indicates the intensity of the effect for each color channel + // acting in effect as an alpha blending factor different for each channel. For instance (1.0,0.0,0.0) will apply + // the effect only to the Red channel. Intermediate values blends the effect with the source color. + void filterGamma(F32 gamma, const LLColor3& alpha); // Apply gamma to each channel + void filterLinearize(F32 tail, const LLColor3& alpha); // Use histogram to linearize constrast between min and max values minus tail + void filterEqualize(S32 nb_classes, const LLColor3& alpha); // Use histogram to equalize constrast between nb_classes throughout the image + void filterColorize(const LLColor3& color, const LLColor3& alpha); // Colorize with color and alpha per channel + void filterContrast(F32 slope, const LLColor3& alpha); // Change contrast according to slope: > 1.0 more contrast, < 1.0 less contrast + void filterBrightness(F32 add, const LLColor3& alpha); // Change brightness according to add: > 0 brighter, < 0 darker + + // Filter Primitives + void colorTransform(const LLMatrix3 &transform); + void colorCorrect(const U8* lut_red, const U8* lut_green, const U8* lut_blue); + void filterScreen(EScreenMode mode, const F32 wave_length, const F32 angle); + void blendStencil(F32 alpha, U8* pixel, U8 red, U8 green, U8 blue); + void convolve(const LLMatrix3 &kernel, bool normalize, bool abs_value); + + // Procedural Stencils + void setStencil(EStencilShape shape, EStencilBlendMode mode, F32 min, F32 max, F32* params); + F32 getStencilAlpha(S32 i, S32 j); + + // Histograms + U32* getBrightnessHistogram(); + void computeHistograms(); + + LLSD mFilterData; + LLPointer<LLImageRaw> mImage; + + // Histograms (if we ever happen to need them) + U32 *mHistoRed; + U32 *mHistoGreen; + U32 *mHistoBlue; + U32 *mHistoBrightness; + + // Current Stencil Settings + EStencilBlendMode mStencilBlendMode; + EStencilShape mStencilShape; + F32 mStencilMin; + F32 mStencilMax; + + S32 mStencilCenterX; + S32 mStencilCenterY; + S32 mStencilWidth; + F32 mStencilGamma; + + F32 mStencilWavelength; + F32 mStencilSine; + F32 mStencilCosine; + + F32 mStencilStartX; + F32 mStencilStartY; + F32 mStencilGradX; + F32 mStencilGradY; + F32 mStencilGradN; +}; + + +#endif |