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/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and /or associated documentation files
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* (the "Materials "), to deal in the Materials without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Materials,
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* and to permit persons to whom the Materials are furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Materials.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
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* THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#include "sfDynamicBlitter.h"
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#ifndef __SFBLITTER_H
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# include "sfBlitter.h"
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#endif
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#ifndef __SFMASK_H
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# include "sfMask.h"
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#endif
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namespace OpenVGRI {
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RI_INLINE static bool maskOperationRequiresLoad(VGMaskOperation op)
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{
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switch(op)
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{
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case VG_CLEAR_MASK:
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case VG_FILL_MASK:
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case VG_SET_MASK:
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return false;
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default:
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RI_ASSERT(op == VG_UNION_MASK || op == VG_INTERSECT_MASK || op == VG_SUBTRACT_MASK);
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return true;
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}
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}
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/**
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* \brief Blit rectangular areas between similar or different color format buffers.
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* \note Implementation is structured so that the per-pixel branches are minimized
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* even if dynamic compilation is not in use.
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* \todo For some reason the completely generic integer conversion does not optimize
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* fully run-time. Check what causes this!
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*/
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void executeBlitter(const DynamicBlitter::BlitSignatureState& state, const DynamicBlitter::BlitUniforms& uniforms)
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{
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const void* srcPtr = Image::calculateAddress(
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uniforms.src, state.srcDesc.bitsPerPixel, uniforms.srcX, uniforms.srcY, uniforms.srcStride);
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void* dstPtr = Image::calculateAddress(
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uniforms.dst, state.dstDesc.bitsPerPixel, uniforms.dstX, uniforms.dstY, uniforms.dstStride);
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// The following flag is useful for debugging. Enabling it will hurt performance.
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//#define ALWAYS_FORCE_FULL_CONVERSION
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// Currently the data must be byte-aligned for memcpy optimizations:
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const int minBpp = RI_INT_MIN(state.srcDesc.bitsPerPixel, state.dstDesc.bitsPerPixel);
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const bool byteCopy = minBpp >= 8 ? true : false;
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const bool forceFullConversion = state.isMaskOperation || state.unsafeInput || !byteCopy;
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#if !defined(ALWAYS_FORCE_FULL_CONVERSION)
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if (state.srcDesc.isZeroConversion(state.dstDesc) && !forceFullConversion)
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{
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const int fullCopyStride = Image::descriptorToStride(state.srcDesc, uniforms.width);
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if ((uniforms.dstStride != uniforms.srcStride) || (fullCopyStride != uniforms.srcStride))
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{
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// memcpy individual scanlines.
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const size_t scanLength = (size_t)RI_INT_ABS(Image::descriptorToStride(state.srcDesc, uniforms.width));
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for (RIuint32 i = 0; i < uniforms.height; i++)
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{
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memcpy(dstPtr, srcPtr, scanLength);
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dstPtr = (void*)((RIuint8*)dstPtr + uniforms.dstStride);
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srcPtr = (void*)((RIuint8*)srcPtr + uniforms.srcStride);
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}
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} else
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{
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// memcpy the whole area
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memcpy(dstPtr, srcPtr, uniforms.srcStride * uniforms.height);
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}
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} else if (state.srcDesc.isShiftConversion(state.dstDesc) && !forceFullConversion)
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{
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// \todo Separate to function? Replace with pointer read/write & advance.
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if (state.srcDesc.isShiftConversionToLower(state.dstDesc))
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{
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// Components can be immediately shifted down to lower bit-depth.
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for (RIuint32 j = 0; j < uniforms.height; j++)
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{
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RIuint8* srcStart = (RIuint8*)srcPtr;
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RIuint8* dstStart = (RIuint8*)dstPtr;
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RIuint32 srcX = uniforms.srcX;
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RIuint32 dstX = uniforms.dstX;
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for (RIuint32 i = 0; i < uniforms.width; i++)
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{
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RIuint32 c = Image::readPackedPixelFromAddress(srcPtr, state.srcDesc.bitsPerPixel, srcX); // \todo srcX!
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RIuint32 dc = Color::Descriptor::crossConvertToLower(c, state.srcDesc, state.dstDesc);
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Image::writePackedPixelToAddress(dstPtr, state.dstDesc.bitsPerPixel, dstX, dc);
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srcPtr = Image::incrementPointer(srcPtr, state.srcDesc.bitsPerPixel, srcX);
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dstPtr = (void*)Image::incrementPointer(dstPtr, state.dstDesc.bitsPerPixel, dstX);
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srcX++;
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dstX++;
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}
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srcPtr = (void*)(srcStart + uniforms.srcStride);
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dstPtr = (void*)(dstStart + uniforms.dstStride);
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}
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}
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else
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{
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// Color components require expansion before shifting to destination color-format */
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for (RIuint32 j = 0; j < uniforms.height; j++)
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{
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RIuint8* srcStart = (RIuint8*)srcPtr;
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RIuint8* dstStart = (RIuint8*)dstPtr;
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RIuint32 srcX = uniforms.srcX;
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RIuint32 dstX = uniforms.dstX;
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for (RIuint32 i = 0; i < uniforms.width; i++)
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{
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RIuint32 c = Image::readPackedPixelFromAddress(srcPtr, state.srcDesc.bitsPerPixel, srcX);
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IntegerColor ic = IntegerColor(c, state.srcDesc);
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ic.expandColor(state.srcDesc);
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ic.truncateColor(state.dstDesc);
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RIuint32 dc = ic.getPackedColor(state.dstDesc);
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Image::writePackedPixelToAddress(dstPtr, state.dstDesc.bitsPerPixel, dstX, dc);
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srcPtr = Image::incrementPointer(srcPtr, state.srcDesc.bitsPerPixel, srcX);
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dstPtr = (void*)Image::incrementPointer(dstPtr, state.dstDesc.bitsPerPixel, dstX);
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srcX++;
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dstX++;
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}
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srcPtr = (void*)(srcStart + uniforms.srcStride);
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dstPtr = (void*)(dstStart + uniforms.dstStride);
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}
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}
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} else
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#endif
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{
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/* This block should handle the rest (and all) of the color-conversion cases. */
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for (RIuint32 j = 0; j < uniforms.height; j++)
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{
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RIuint8* srcStart = (RIuint8*)srcPtr;
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RIuint8* dstStart = (RIuint8*)dstPtr;
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RIuint32 srcX = uniforms.srcX;
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RIuint32 dstX = uniforms.dstX;
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for (RIuint32 i = 0; i < uniforms.width; i++)
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{
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RIuint32 c = Image::readPackedPixelFromAddress(srcPtr, state.srcDesc.bitsPerPixel, srcX);
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IntegerColor ic;
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RIuint32 dc;
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if (!state.isMaskOperation)
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{
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ic = IntegerColor(c, state.srcDesc);
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if (state.unsafeInput)
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ic.clampToAlpha();
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ic.convertToFrom(state.dstDesc, state.srcDesc, false);
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dc = ic.getPackedColor(state.dstDesc);
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}
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else
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{
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// Apply the given mask operation between two surfaces.
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IntegerColor id;
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if (maskOperationRequiresLoad(state.maskOperation))
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{
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ic.fromPackedMask(c, state.srcDesc);
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ic.expandMask(state.srcDesc);
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IntegerColor id;
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RIuint32 d = Image::readPackedPixelFromAddress(dstPtr, state.dstDesc.bitsPerPixel, dstX);
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id.fromPackedMask(d, state.dstDesc);
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id.expandColor(state.dstDesc);
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RIuint32 coverage = ic.a + (ic.a >> 7);
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ic = intMaskOperation(coverage, id, state.maskOperation);
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}
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else
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{
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// Other ops handled with memset, not blitter
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RI_ASSERT(state.maskOperation == VG_SET_MASK);
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ic.fromPackedMask(c, state.srcDesc);
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//ic.expandMask(state.srcDesc);
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ic.convertToFrom(state.dstDesc, state.srcDesc, true);
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}
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dc = ic.getPackedMaskColor(state.dstDesc);
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}
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Image::writePackedPixelToAddress(dstPtr, state.dstDesc.bitsPerPixel, dstX, dc);
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srcPtr = Image::incrementPointer(srcPtr, state.srcDesc.bitsPerPixel, srcX);
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dstPtr = (void*)Image::incrementPointer(dstPtr, state.dstDesc.bitsPerPixel, dstX);
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srcX++;
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dstX++;
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}
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srcPtr = (void*)(srcStart + uniforms.srcStride);
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dstPtr = (void*)(dstStart + uniforms.dstStride);
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}
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}
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}
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}
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