#include <stddef.h>
#include <cmath>
#include <limits>
+#include <memory>
#include <dali/integration-api/debug.h>
#include <dali/public-api/common/dali-vector.h>
#include <dali/public-api/math/vector2.h>
*
* @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.
+ * @note It may fail if malloc() fails to allocate memory.
*
* @param[in] pixelsIn The input buffer.
* @param[in] widthIn The width of the input buffer.
* @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.
+ *
+ * @return Whether the rotation succeded.
*/
-void Rotate90( const uint8_t* const pixelsIn,
+bool Rotate90( const uint8_t* const pixelsIn,
unsigned int widthIn,
unsigned int heightIn,
unsigned int pixelSize,
// Allocate memory for the rotated buffer.
pixelsOut = static_cast<uint8_t*>( malloc ( widthOut * heightOut * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ widthOut = 0u;
+ heightOut = 0u;
+
+ // Return if the memory allocations fails.
+ return false;
+ }
// Rotate the buffer.
for( unsigned int y = 0u; y < heightIn; ++y )
}
}
}
+
+ return true;
}
/**
*
* @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.
+ * @note It may fail if malloc() fails to allocate memory.
*
* @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.
+ *
+ * @return Whether the rotation succeded.
*/
-void Rotate180( const uint8_t* const pixelsIn,
+bool Rotate180( const uint8_t* const pixelsIn,
unsigned int widthIn,
unsigned int heightIn,
unsigned int pixelSize,
{
// Allocate memory for the rotated buffer.
pixelsOut = static_cast<uint8_t*>( malloc ( widthIn * heightIn * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ // Return if the memory allocations fails.
+ return false;
+ }
// Rotate the buffer.
for( unsigned int y = 0u; y < heightIn; ++y )
}
}
}
+
+ return true;
}
/**
*
* @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.
+ * @note It may fail if malloc() fails to allocate memory.
*
* @param[in] pixelsIn The input buffer.
* @param[in] widthIn The width of the input buffer.
* @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.
+ *
+ * @return Whether the rotation succeded.
*/
-void Rotate270( const uint8_t* const pixelsIn,
+bool Rotate270( const uint8_t* const pixelsIn,
unsigned int widthIn,
unsigned int heightIn,
unsigned int pixelSize,
// Allocate memory for the rotated buffer.
pixelsOut = static_cast<uint8_t*>( malloc ( widthOut * heightOut * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ widthOut = 0u;
+ heightOut = 0u;
+
+ // Return if the memory allocations fails.
+ return false;
+ }
// Rotate the buffer.
for( unsigned int y = 0u; y < heightIn; ++y )
}
}
}
+
+ return true;
}
/**
// 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 );
+ fastRotationPerformed = Rotate90( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut,
+ widthOut,
+ heightOut );
+
+ if( !fastRotationPerformed )
+ {
+ // The fast rotation failed.
+ return;
+ }
+
radians -= Math::PI_2;
- fastRotationPerformed = true;
}
else if( ( radians > RAD_135 ) && ( radians <= RAD_225 ) )
{
// so it requires only an extra rotation angle
// of -45.0 .. +45.0 to complete rotation.
- Rotate180( pixelsIn,
- widthIn,
- heightIn,
- pixelSize,
- pixelsOut );
+ fastRotationPerformed = Rotate180( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut );
+
+ if( !fastRotationPerformed )
+ {
+ // The fast rotation failed.
+ return;
+ }
+
radians -= Math::PI;
widthOut = widthIn;
heightOut = heightIn;
- fastRotationPerformed = true;
}
else if( ( radians > RAD_225 ) && ( radians <= RAD_315 ) )
{
// so it requires only an extra rotation angle
// of -45.0 .. +45.0 to complete rotation.
- Rotate270( pixelsIn,
- widthIn,
- heightIn,
- pixelSize,
- pixelsOut,
- widthOut,
- heightOut );
+ fastRotationPerformed = Rotate270( pixelsIn,
+ widthIn,
+ heightIn,
+ pixelSize,
+ pixelsOut,
+ widthOut,
+ heightOut );
+
+ if( !fastRotationPerformed )
+ {
+ // The fast rotation failed.
+ return;
+ }
+
radians -= RAD_270;
- fastRotationPerformed = true;
}
if( fabs( radians ) < Dali::Math::MACHINE_EPSILON_10 )
return;
}
- const uint8_t* const firstHorizontalSkwePixelsIn = fastRotationPerformed ? pixelsOut : pixelsIn;
- uint8_t* tmpFirstHorizontalSkwePixelsIn = fastRotationPerformed ? pixelsOut : nullptr; // keep the pointer to free the memory.
+ const uint8_t* const firstHorizontalSkewPixelsIn = fastRotationPerformed ? pixelsOut : pixelsIn;
+ std::unique_ptr<uint8_t, void(*)(void*)> tmpPixelsInPtr( ( fastRotationPerformed ? pixelsOut : nullptr ), free );
// Reset the input/output
widthIn = widthOut;
// Allocate the buffer for the 1st shear
pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ widthOut = 0u;
+ heightOut = 0u;
+
+ // The deleter of the tmpPixelsInPtr unique pointer is called freeing the memory allocated by the 'Fast rotations'.
+ // Nothing else to do if the memory allocation fails.
+ return;
+ }
+
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 ) );
+ HorizontalSkew( firstHorizontalSkewPixelsIn, 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;
+ // Reset the 'pixel in' pointer with the output of the 'First Horizontal Skew' and free the memory allocated by the 'Fast Rotations'.
+ tmpPixelsInPtr.reset( pixelsOut );
unsigned int tmpWidthIn = widthOut;
unsigned int tmpHeightIn = heightOut;
// Allocate the buffer for the 2nd shear
pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ widthOut = 0u;
+ heightOut = 0u;
+
+ // The deleter of the tmpPixelsInPtr unique pointer is called freeing the memory allocated by the 'First Horizontal Skew'.
+ // Nothing else to do if the memory allocation fails.
+ return;
+ }
+
// Variable skew offset
float offset = angleSinus * ( ( angleSinus > 0.f ) ? static_cast<float>( widthIn - 1u ) : -( static_cast<float>( widthIn ) - static_cast<float>( widthOut ) ) );
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 ) );
+ VerticalSkew( tmpPixelsInPtr.get(), 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 'pixel in' pointer with the output of the 'Vertical Skew' and free the memory allocated by the 'First Horizontal Skew'.
// Reset the input/output
- tmpPixelsIn = pixelsOut;
+ tmpPixelsInPtr.reset( pixelsOut );
tmpWidthIn = widthOut;
tmpHeightIn = heightOut;
pixelsOut = nullptr;
// Allocate the buffer for the 3rd shear
pixelsOut = static_cast<uint8_t*>( malloc( widthOut * heightOut * pixelSize ) );
+ if( nullptr == pixelsOut )
+ {
+ widthOut = 0u;
+ heightOut = 0u;
+
+ // The deleter of the tmpPixelsInPtr unique pointer is called freeing the memory allocated by the 'Vertical Skew'.
+ // Nothing else to do if the memory allocation fails.
+ return;
+ }
+
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 ) );
+ HorizontalSkew( tmpPixelsInPtr.get(), 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.
+ // The deleter of the tmpPixelsInPtr unique pointer is called freeing the memory allocated by the 'Vertical Skew'.
+ // @note Allocated memory by the last 'Horizontal Skew' has to be freed by the caller to this function.
}
} /* namespace Platform */
projects / platform / core / uifw / dali-adaptor.git / commitdiff