/*
- * Copyright (c) 2017 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
const float DEFAULT_SOURCE_GAMMA = 1.75f; ///< Default source gamma value used in the Resampler() function. Partial gamma correction looks better on mips. Set to 1.0 to disable gamma correction.
const float FILTER_SCALE = 1.f; ///< Default filter scale value used in the Resampler() function. Filter scale - values < 1.0 cause aliasing, but create sharper looking mips.
+const float RAD_135 = Math::PI_2 + Math::PI_4; ///< 135 degrees in radians;
+const float RAD_225 = RAD_135 + Math::PI_2; ///< 225 degrees in radians;
+const float RAD_270 = 3.f * Math::PI_2; ///< 270 degrees in radians;
+const float RAD_315 = RAD_225 + Math::PI_2; ///< 315 degrees in radians;
+
using Integration::Bitmap;
using Integration::BitmapPtr;
typedef unsigned char PixelBuffer;
return ImageDimensions( bitmapWidth / float(bitmapHeight) * requestedHeight + 0.5f, requestedHeight );
}
+/**
+ * @brief Rotates the given buffer @p pixelsIn 90 degrees counter clockwise.
+ *
+ * @note It allocates memory for the returned @p pixelsOut buffer.
+ * @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+ *
+ * @param[in] pixelsIn The input buffer.
+ * @param[in] widthIn The width of the input buffer.
+ * @param[in] heightIn The height of the input buffer.
+ * @param[in] pixelSize The size of the pixel.
+ * @param[out] pixelsOut The rotated output buffer.
+ * @param[out] widthOut The width of the output buffer.
+ * @param[out] heightOut The height of the output buffer.
+ */
+void Rotate90( const uint8_t* const pixelsIn,
+ unsigned int widthIn,
+ unsigned int heightIn,
+ unsigned int pixelSize,
+ uint8_t*& pixelsOut,
+ unsigned int& widthOut,
+ unsigned int& heightOut )
+{
+ // The new size of the image.
+ widthOut = heightIn;
+ heightOut = widthIn;
+
+ // Allocate memory for the rotated buffer.
+ pixelsOut = static_cast<uint8_t*>( malloc ( widthOut * heightOut * pixelSize ) );
+
+ // Rotate the buffer.
+ for( unsigned int y = 0u; y < heightIn; ++y )
+ {
+ const unsigned int srcLineIndex = y * widthIn;
+ const unsigned int dstX = y;
+ for( unsigned int x = 0u; x < widthIn; ++x )
+ {
+ const unsigned int dstY = heightOut - x - 1u;
+ const unsigned int dstIndex = pixelSize * ( dstY * widthOut + dstX );
+ const unsigned int srcIndex = pixelSize * ( srcLineIndex + x );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( pixelsOut + dstIndex + channel ) = *( pixelsIn + srcIndex + channel );
+ }
+ }
+ }
+}
+
+/**
+ * @brief Rotates the given buffer @p pixelsIn 180 degrees counter clockwise.
+ *
+ * @note It allocates memory for the returned @p pixelsOut buffer.
+ * @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+ *
+ * @param[in] pixelsIn The input buffer.
+ * @param[in] widthIn The width of the input buffer.
+ * @param[in] heightIn The height of the input buffer.
+ * @param[in] pixelSize The size of the pixel.
+ * @param[out] pixelsOut The rotated output buffer.
+ */
+void Rotate180( const uint8_t* const pixelsIn,
+ unsigned int widthIn,
+ unsigned int heightIn,
+ unsigned int pixelSize,
+ uint8_t*& pixelsOut )
+{
+ // Allocate memory for the rotated buffer.
+ pixelsOut = static_cast<uint8_t*>( malloc ( widthIn * heightIn * pixelSize ) );
+
+ // Rotate the buffer.
+ for( unsigned int y = 0u; y < heightIn; ++y )
+ {
+ const unsigned int srcLineIndex = y * widthIn;
+ const unsigned int dstY = heightIn - y - 1u;
+ for( unsigned int x = 0u; x < widthIn; ++x )
+ {
+ const unsigned int dstX = widthIn - x - 1u;
+ const unsigned int dstIndex = pixelSize * ( dstY * widthIn + dstX );
+ const unsigned int srcIndex = pixelSize * ( srcLineIndex + x );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( pixelsOut + dstIndex + channel ) = *( pixelsIn + srcIndex + channel );
+ }
+ }
+ }
+}
+
+/**
+ * @brief Rotates the given buffer @p pixelsIn 270 degrees counter clockwise.
+ *
+ * @note It allocates memory for the returned @p pixelsOut buffer.
+ * @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+ *
+ * @param[in] pixelsIn The input buffer.
+ * @param[in] widthIn The width of the input buffer.
+ * @param[in] heightIn The height of the input buffer.
+ * @param[in] pixelSize The size of the pixel.
+ * @param[out] pixelsOut The rotated output buffer.
+ * @param[out] widthOut The width of the output buffer.
+ * @param[out] heightOut The height of the output buffer.
+ */
+void Rotate270( const uint8_t* const pixelsIn,
+ unsigned int widthIn,
+ unsigned int heightIn,
+ unsigned int pixelSize,
+ uint8_t*& pixelsOut,
+ unsigned int& widthOut,
+ unsigned int& heightOut )
+{
+ // The new size of the image.
+ widthOut = heightIn;
+ heightOut = widthIn;
+
+ // Allocate memory for the rotated buffer.
+ pixelsOut = static_cast<uint8_t*>( malloc ( widthOut * heightOut * pixelSize ) );
+
+ // Rotate the buffer.
+ for( unsigned int y = 0u; y < heightIn; ++y )
+ {
+ const unsigned int srcLineIndex = y * widthIn;
+ const unsigned int dstX = widthOut - y - 1u;
+ for( unsigned int x = 0u; x < widthIn; ++x )
+ {
+ const unsigned int dstY = x;
+ const unsigned int dstIndex = pixelSize * ( dstY * widthOut + dstX );
+ const unsigned int srcIndex = pixelSize * ( srcLineIndex + x );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( pixelsOut + dstIndex + channel ) = *( pixelsIn + srcIndex + channel );
+ }
+ }
+ }
+}
+
+/**
+ * @brief Skews a row horizontally (with filtered weights)
+ *
+ * @note Limited to 45 degree skewing only.
+ * @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+ *
+ * @param[in] srcBufferPtr Pointer to the input pixel buffer.
+ * @param[in] srcWidth The width of the input pixel buffer.
+ * @param[in] pixelSize The size of the pixel.
+ * @param[in,out] dstPixelBuffer Pointer to the output pixel buffer.
+ * @param[in] dstWidth The width of the output pixel buffer.
+ * @param[in] row The row index.
+ * @param[in] offset The skew offset.
+ * @param[in] weight The relative weight of right pixel.
+ */
+void HorizontalSkew( const uint8_t* const srcBufferPtr,
+ int srcWidth,
+ unsigned int pixelSize,
+ uint8_t*& dstBufferPtr,
+ int dstWidth,
+ unsigned int row,
+ int offset,
+ float weight )
+{
+ if( offset > 0 )
+ {
+ // Fill gap left of skew with background.
+ memset( dstBufferPtr + row * pixelSize * dstWidth, 0u, pixelSize * offset );
+ }
+
+ unsigned char oldLeft[4u] = { 0u, 0u, 0u, 0u };
+
+ int i = 0;
+ for( i = 0u; i < srcWidth; ++i )
+ {
+ // Loop through row pixels
+ const unsigned int srcIndex = pixelSize * ( row * srcWidth + i );
+
+ unsigned char src[4u] = { 0u, 0u, 0u, 0u };
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ src[channel] = *( srcBufferPtr + srcIndex + channel );
+ }
+
+ // Calculate weights
+ unsigned char left[4u] = { 0u, 0u, 0u, 0u };
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ left[channel] = static_cast<unsigned char>( static_cast<float>( src[channel] ) * weight );
+
+ // Update left over on source
+ src[channel] -= ( left[channel] - oldLeft[channel] );
+ }
+
+ // Check boundaries
+ if( ( i + offset >= 0 ) && ( i + offset < dstWidth ) )
+ {
+ const unsigned int dstIndex = pixelSize * ( row * dstWidth + i + offset );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = src[channel];
+ }
+ }
+
+ // Save leftover for next pixel in scan
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ oldLeft[channel] = left[channel];
+ }
+ }
+
+ // Go to rightmost point of skew
+ i += offset;
+ if( i < dstWidth )
+ {
+ // If still in image bounds, put leftovers there
+ const unsigned int dstIndex = pixelSize * ( row * dstWidth + i );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = oldLeft[channel];
+ }
+
+ // Clear to the right of the skewed line with background
+ ++i;
+ memset( dstBufferPtr + pixelSize * ( row * dstWidth + i ), 0u, pixelSize * ( dstWidth - i ) );
+ }
+}
+
+/**
+ * @brief Skews a column vertically (with filtered weights)
+ *
+ * @note Limited to 45 degree skewing only.
+ * @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+ *
+ * @param[in] srcBufferPtr Pointer to the input pixel buffer.
+ * @param[in] srcWidth The width of the input pixel buffer.
+ * @param[in] srcHeight The height of the input pixel buffer.
+ * @param[in] pixelSize The size of the pixel.
+ * @param[in,out] dstPixelBuffer Pointer to the output pixel buffer.
+ * @param[in] dstWidth The width of the output pixel buffer.
+ * @param[in] dstHeight The height of the output pixel buffer.
+ * @param[in] column The column index.
+ * @param[in] offset The skew offset.
+ * @param[in] weight The relative weight of uppeer pixel.
+ */
+void VerticalSkew( const uint8_t* const srcBufferPtr,
+ int srcWidth,
+ int srcHeight,
+ unsigned int pixelSize,
+ uint8_t*& dstBufferPtr,
+ int dstWidth,
+ int dstHeight,
+ unsigned int column,
+ int offset,
+ float weight )
+{
+ for( int i = 0; i < offset; ++i )
+ {
+ // Fill gap above skew with background
+ const unsigned int dstIndex = pixelSize * ( i * dstWidth + column );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = 0u;
+ }
+ }
+
+ unsigned char oldLeft[4u] = { 0u, 0u, 0u, 0u };
+
+ int yPos = 0;
+ int i = 0;
+ for( i = 0; i < srcHeight; ++i )
+ {
+ // Loop through column pixels
+ const unsigned int srcIndex = pixelSize * ( i * srcWidth + column );
+
+ unsigned char src[4u] = { 0u, 0u, 0u, 0u };
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ src[channel] = *( srcBufferPtr + srcIndex + channel );
+ }
+
+ yPos = i + offset;
+
+ // Calculate weights
+ unsigned char left[4u] = { 0u, 0u, 0u, 0u };
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ left[channel] = static_cast<unsigned char>( static_cast<float>( src[channel] ) * weight );
+ // Update left over on source
+ src[channel] -= ( left[channel] - oldLeft[channel] );
+ }
+
+ // Check boundaries
+ if( ( yPos >= 0 ) && ( yPos < dstHeight ) )
+ {
+ const unsigned int dstIndex = pixelSize * ( yPos * dstWidth + column );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = src[channel];
+ }
+ }
+
+ // Save leftover for next pixel in scan
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ oldLeft[channel] = left[channel];
+ }
+ }
+
+ // Go to bottom point of skew
+ i = yPos;
+ if( i < dstHeight )
+ {
+ // If still in image bounds, put leftovers there
+ const unsigned int dstIndex = pixelSize * ( i * dstWidth + column );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = oldLeft[channel];
+ }
+ }
+
+ while( ++i < dstHeight )
+ {
+ // Clear below skewed line with background
+ const unsigned int dstIndex = pixelSize * ( i * dstWidth + column );
+
+ for( unsigned int channel = 0u; channel < pixelSize; ++channel )
+ {
+ *( dstBufferPtr + dstIndex + channel ) = 0u;
+ }
+ }
+}
+
} // namespace - unnamed
ImageDimensions CalculateDesiredDimensions( ImageDimensions rawDimensions, ImageDimensions requestedDimensions )
}
}
+void RotateByShear( const uint8_t* const pixelsIn,
+ unsigned int widthIn,
+ unsigned int heightIn,
+ unsigned int pixelSize,
+ float radians,
+ uint8_t*& pixelsOut,
+ unsigned int& widthOut,
+ unsigned int& heightOut )
+{
+ // @note Code got from https://www.codeproject.com/Articles/202/High-quality-image-rotation-rotate-by-shear by Eran Yariv.
+
+ // Do first the fast rotations to transform the angle into a (-45..45] range.
+
+ float fastRotationPerformed = false;
+ if( ( radians > Math::PI_4 ) && ( radians <= RAD_135 ) )
+ {
+ // Angle in (45.0 .. 135.0]
+ // Rotate image by 90 degrees into temporary image,
+ // so it requires only an extra rotation angle
+ // of -45.0 .. +45.0 to complete rotation.
+ Rotate90( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut,
+ widthOut,
+ heightOut );
+ radians -= Math::PI_2;
+ fastRotationPerformed = true;
+ }
+ else if( ( radians > RAD_135 ) && ( radians <= RAD_225 ) )
+ {
+ // Angle in (135.0 .. 225.0]
+ // Rotate image by 180 degrees into temporary image,
+ // so it requires only an extra rotation angle
+ // of -45.0 .. +45.0 to complete rotation.
+
+ Rotate180( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut );
+ radians -= Math::PI;
+ widthOut = widthIn;
+ heightOut = heightIn;
+ fastRotationPerformed = true;
+ }
+ else if( ( radians > RAD_225 ) && ( radians <= RAD_315 ) )
+ {
+ // Angle in (225.0 .. 315.0]
+ // Rotate image by 270 degrees into temporary image,
+ // so it requires only an extra rotation angle
+ // of -45.0 .. +45.0 to complete rotation.
+
+ Rotate270( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut,
+ widthOut,
+ heightOut );
+ radians -= RAD_270;
+ fastRotationPerformed = true;
+ }
+
+ if( fabs( radians ) < Dali::Math::MACHINE_EPSILON_10 )
+ {
+ // Nothing else to do if the angle is zero.
+ // The rotation angle was 90, 180 or 270.
+
+ // @note Allocated memory by 'Fast Rotations', if any, has to be freed by the called to this function.
+ return;
+ }
+
+ const uint8_t* const firstHorizontalSkwePixelsIn = fastRotationPerformed ? pixelsOut : pixelsIn;
+ uint8_t* tmpFirstHorizontalSkwePixelsIn = fastRotationPerformed ? pixelsOut : nullptr; // keep the pointer to free the memory.
+
+ // Reset the input/output
+ widthIn = widthOut;
+ heightIn = heightOut;
+ pixelsOut = nullptr;
+
+ const float angleSinus = sin( radians );
+ const float angleCosinus = cos( radians );
+ const float angleTangent = tan( 0.5f * radians );
+
+ ///////////////////////////////////////
+ // Perform 1st shear (horizontal)
+ ///////////////////////////////////////
+
+ // Calculate first shear (horizontal) destination image dimensions
+
+ widthOut = widthIn + static_cast<unsigned int>( fabs( angleTangent ) * static_cast<float>( heightIn ) );
+ heightOut = heightIn;
+
+ // Allocate the buffer for the 1st shear
+ pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+
+ for( unsigned int y = 0u; y < heightOut; ++y )
+ {
+ const float shear = angleTangent * ( ( angleTangent >= 0.f ) ? ( 0.5f + static_cast<float>( y ) ) : ( 0.5f + static_cast<float>( y ) - static_cast<float>( heightOut ) ) );
+
+ const int intShear = static_cast<int>( floor( shear ) );
+ HorizontalSkew( firstHorizontalSkwePixelsIn, widthIn, pixelSize, pixelsOut, widthOut, y, intShear, shear - static_cast<float>( intShear ) );
+ }
+
+ // Free the memory allocated by the 'Fast Rotations'.
+ free( tmpFirstHorizontalSkwePixelsIn );
+
+ uint8_t* tmpPixelsIn = pixelsOut;
+ unsigned int tmpWidthIn = widthOut;
+ unsigned int tmpHeightIn = heightOut;
+
+ // Reset the input/output
+ pixelsOut = nullptr;
+
+ ///////////////////////////////////////
+ // Perform 2nd shear (vertical)
+ ///////////////////////////////////////
+
+ // Calc 2nd shear (vertical) destination image dimensions
+ heightOut = static_cast<unsigned int>( static_cast<float>( widthIn ) * fabs( angleSinus ) + static_cast<float>( heightIn ) * angleCosinus );
+
+ // Allocate the buffer for the 2nd shear
+ pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+
+ // Variable skew offset
+ float offset = angleSinus * ( ( angleSinus > 0.f ) ? static_cast<float>( widthIn - 1u ) : -( static_cast<float>( widthIn ) - static_cast<float>( widthOut ) ) );
+
+ unsigned int column = 0u;
+ for( column = 0u; column < widthOut; ++column, offset -= angleSinus )
+ {
+ const int shear = static_cast<int>( floor( offset ) );
+ VerticalSkew( tmpPixelsIn, tmpWidthIn, tmpHeightIn, pixelSize, pixelsOut, widthOut, heightOut, column, shear, offset - static_cast<float>( shear ) );
+ }
+
+ // Free the memory allocated by the 'First Horizontal Skew'.
+ free( tmpPixelsIn );
+
+ // Reset the input/output
+ tmpPixelsIn = pixelsOut;
+ tmpWidthIn = widthOut;
+ tmpHeightIn = heightOut;
+ pixelsOut = nullptr;
+
+ ///////////////////////////////////////
+ // Perform 3rd shear (horizontal)
+ ///////////////////////////////////////
+
+ // Calc 3rd shear (horizontal) destination image dimensions
+ widthOut = static_cast<unsigned int>( static_cast<float>( heightIn ) * fabs( angleSinus ) + static_cast<float>( widthIn ) * angleCosinus ) + 1u;
+
+ // Allocate the buffer for the 3rd shear
+ pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+
+ offset = ( angleSinus >= 0.f ) ? -angleSinus * angleTangent * static_cast<float>( widthIn - 1u ) : angleTangent * ( static_cast<float>( widthIn - 1u ) * -angleSinus + ( 1.f - static_cast<float>( heightOut ) ) );
+
+ for( unsigned int y = 0u; y < heightOut; ++y, offset += angleTangent )
+ {
+ const int shear = static_cast<int>( floor( offset ) );
+ HorizontalSkew( tmpPixelsIn, tmpWidthIn, pixelSize, pixelsOut, widthOut, y, shear, offset - static_cast<float>( shear ) );
+ }
+
+ // Free the memory allocated by the 'First Horizontal Skew'.
+ free( tmpPixelsIn );
+
+ // @note Allocated memory by the last 'Horizontal Skew' has to be freed by the called to this function.
+}
+
} /* namespace Platform */
} /* namespace Internal */
} /* namespace Dali */
projects / platform / core / uifw / dali-adaptor.git / commitdiff