/*
- * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2017 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.
#ifndef DALI_INTERNAL_PLATFORM_IMAGE_OPERATIONS_H_
#define DALI_INTERNAL_PLATFORM_IMAGE_OPERATIONS_H_
-// INTERNAL INCLUDES
-#include <dali/integration-api/bitmap.h>
-#include <dali/public-api/images/image-attributes.h>
-
// EXTERNAL INCLUDES
#include <stdint.h>
+// INTERNAL INCLUDES
+#include <dali/integration-api/bitmap.h>
+#include <dali/public-api/images/image-operations.h>
+
namespace Dali
{
namespace Internal
};
/**
- * @brief Simple class for passing around pairs of small ints.
- *
- * These are immutable. If you want to change a value, make a whole new object.
- * @note One of these can be passed in a single 32 bit integer register on
- * common architectures.
- */
-class Vector2Uint16
-{
-public:
- /**
- * @brief Default constructor for the (0, 0) vector.
- */
- Vector2Uint16() : mData(0) {}
-
- /**
- * @brief Constructor taking separate x and y (width and height) parameters.
- * @param[in] width The width or X dimension of the vector. Make sure it is less than 65536,
- * @param[in] height The height or Y dimension of the vector. Make sure it is less than 65536,
- */
- Vector2Uint16( uint32_t width, uint32_t height )
- {
- DALI_ASSERT_DEBUG( width < ( 1u << 16 ) && "Width parameter not representable." );
- DALI_ASSERT_DEBUG( height < ( 1u << 16 ) && "Height parameter not representable." );
-
- /* Do equivalent of the code below with one aligned memory access:
- * mComponents[0] = width;
- * mComponents[1] = height;
- * Unit tests make sure this is equivalent.
- **/
- mData = (height << 16u) + width;
- }
-
- /**
- * @brief Copy constructor.
- */
- Vector2Uint16( const Vector2Uint16& rhs )
- {
- mData = rhs.mData;
- }
-
- /**
- * @returns the x dimension stored in this 2-tuple.
- */
- uint16_t GetWidth() const
- {
- return mComponents[0];
- }
-
- /**
- * @returns the y dimension stored in this 2-tuple.
- */
- uint16_t GetHeight() const
- {
- return mComponents[1];
- }
-
- /**
- * @returns the x dimension stored in this 2-tuple.
- */
- uint16_t GetX() const
- {
- return mComponents[0];
- }
-
- /**
- * @returns the y dimension stored in this 2-tuple.
- */
- uint16_t GetY() const
- {
- return mComponents[1];
- }
-
-private:
- union
- {
- // Addressable view of X and Y:
- uint16_t mComponents[2];
- // Packed view of X and Y to force alignment and allow a faster copy:
- uint32_t mData;
- };
-};
-
-/**
- * @brief Human readable text output.
- */
-std::ostream& operator<<( std::ostream& o, const Vector2Uint16& vector );
-
-/**
* @brief The integer dimensions of an image or a region of an image packed into
* 16 bits per component.
* @note This can only be used for images of up to 65535 x 65535 pixels.
*/
-typedef Vector2Uint16 ImageDimensions;
+typedef Uint16Pair ImageDimensions;
+
+/**
+ * @brief Work out the true desired width and height, accounting for special
+ * rules for zeros in either or both input requested dimensions.
+ *
+ * @param[in] rawDimensions Width and height of image before processing.
+ * @param[in] requestedDimensions Width and height of area to scale image into. Can be zero.
+ * @return Dimensions of area to scale image into after special rules are applied.
+ */
+ImageDimensions CalculateDesiredDimensions( ImageDimensions rawDimensions, ImageDimensions requestedDimensions );
/**
* @defgroup BitmapOperations Bitmap-to-Bitmap Image operations.
* bitmap passed-in, or the original bitmap passed in if the attributes
* have no effect.
*/
-Integration::BitmapPtr ApplyAttributesToBitmap( Integration::BitmapPtr bitmap, const ImageAttributes& requestedAttributes );
+Integration::BitmapPtr ApplyAttributesToBitmap( Integration::BitmapPtr bitmap, ImageDimensions dimensions, FittingMode::Type fittingMode = FittingMode::DEFAULT, SamplingMode::Type samplingMode = SamplingMode::DEFAULT );
/**
* @brief Apply downscaling to a bitmap according to requested attributes.
* @note The input bitmap pixel buffer may be modified and used as scratch working space for efficiency, so it must be discarded.
**/
-Integration::BitmapPtr DownscaleBitmap( Integration::Bitmap& bitmap, ImageDimensions desired, ImageAttributes::ScalingMode scalingMode, ImageAttributes::FilterMode filterMode );
+Integration::BitmapPtr DownscaleBitmap( Integration::Bitmap& bitmap, ImageDimensions desired, FittingMode::Type fittingMode, SamplingMode::Type samplingMode );
/**@}*/
/**
unsigned int inputHeight,
unsigned int desiredWidth,
unsigned int desiredHeight,
- ImageAttributes::ScalingMode scalingMode,
- ImageAttributes::FilterMode filterMode,
+ FittingMode::Type fittingMode,
+ SamplingMode::Type samplingMode,
unsigned& outWidth,
unsigned& outHeight );
unsigned int desiredWidth,
unsigned int desiredHeight );
+/**
+ * @brief Resample input image to output image using a bilinear filter.
+ *
+ * Each output pixel is formed of a weighted sum of a 2x2 block of four input
+ * pixels
+ * @pre inPixels must not alias outPixels. The input image should be a totally
+ * separate buffer from the input one.
+ */
+void LinearSample( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inDimensions,
+ Pixel::Format pixelFormat,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions outDimensions );
+
+/**
+ * @copydoc LinearSample
+ *
+ * Specialised for one byte per pixel formats.
+ */
+void LinearSample1BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @copydoc LinearSample
+ *
+ * Specialised for two byte per pixel formats.
+ */
+void LinearSample2BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @copydoc LinearSample
+ *
+ * Specialised for RGB565 16 bit pixel format.
+ */
+void LinearSampleRGB565( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @copydoc LinearSample
+ *
+ * Specialised for three byte per pixel formats like RGB888.
+ */
+void LinearSample3BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @copydoc LinearSample
+ *
+ * Specialised for four byte per pixel formats like RGBA8888.
+ * @note, If used on RGBA8888, the A component will be blended independently.
+ */
+void LinearSample4BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @brief Resamples the input image with the Lanczos algorithm.
+ *
+ * @pre @p inPixels must not alias @p outPixels. The input image should be a totally
+ * separate buffer from the output buffer.
+ *
+ * @param[in] inPixels Pointer to the input image buffer.
+ * @param[in] inputDimensions The input dimensions of the image.
+ * @param[out] outPixels Pointer to the output image buffer.
+ * @param[in] desiredDimensions The output dimensions of the image.
+ */
+void LanczosSample4BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
+/**
+ * @brief Resamples the input image with the Lanczos algorithm.
+ *
+ * @pre @p inPixels must not alias @p outPixels. The input image should be a totally
+ * separate buffer from the output buffer.
+ *
+ * @param[in] inPixels Pointer to the input image buffer.
+ * @param[in] inputDimensions The input dimensions of the image.
+ * @param[out] outPixels Pointer to the output image buffer.
+ * @param[in] desiredDimensions The output dimensions of the image.
+ */
+void LanczosSample1BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions );
+
/**@}*/
/**
return avg;
}
+/** @return The weighted blend of two integers as a 16.16 fixed-point number, given a 0.16 fixed-point blending factor. */
+inline unsigned int WeightedBlendIntToFixed1616(unsigned int a, unsigned int b, unsigned int fractBlend )
+{
+ DALI_ASSERT_DEBUG( fractBlend <= 65535u && "Factor should be in 0.16 fixed-point." );
+ const unsigned int weightedAFixed = a * (65535u - fractBlend);
+ const unsigned int weightedBFixed = b * fractBlend;
+ const unsigned blended = (weightedAFixed + weightedBFixed);
+ return blended;
+}
+
+/** @brief Blend two 16.16 inputs to give a 16.32 output. */
+inline uint64_t WeightedBlendFixed1616ToFixed1632(unsigned int a, unsigned int b, unsigned int fractBlend )
+{
+ DALI_ASSERT_DEBUG( fractBlend <= 65535u && "Factor should be in 0.16 fixed-point." );
+ // Blend while promoting intermediates to 16.32 fixed point:
+ const uint64_t weightedAFixed = uint64_t(a) * (65535u - fractBlend);
+ const uint64_t weightedBFixed = uint64_t(b) * fractBlend;
+ const uint64_t blended = (weightedAFixed + weightedBFixed);
+ return blended;
+}
+
+/**
+ * @brief Blend 4 taps into one value using horizontal and vertical weights.
+ */
+inline unsigned int BilinearFilter1Component(unsigned int tl, unsigned int tr, unsigned int bl, unsigned int br, unsigned int fractBlendHorizontal, unsigned int fractBlendVertical )
+{
+ DALI_ASSERT_DEBUG( fractBlendHorizontal <= 65535u && "Factor should be in 0.16 fixed-point." );
+ DALI_ASSERT_DEBUG( fractBlendVertical <= 65535u && "Factor should be in 0.16 fixed-point." );
+
+ const unsigned int topBlend = WeightedBlendIntToFixed1616( tl, tr, fractBlendHorizontal );
+ const unsigned int botBlend = WeightedBlendIntToFixed1616( bl, br, fractBlendHorizontal );
+ const uint64_t blended2x2 = WeightedBlendFixed1616ToFixed1632( topBlend, botBlend, fractBlendVertical );
+ const unsigned int rounded = (blended2x2 + (1u << 31u) ) >> 32u;
+ return rounded;
+}
+
/**@}*/
} /* namespace Platform */
projects / platform / core / uifw / dali-adaptor.git / blobdiff