/*
- * Copyright (c) 2015 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.
#include <cstring>
#include <stddef.h>
#include <cmath>
+#include <limits>
#include <dali/integration-api/debug.h>
+#include <dali/public-api/common/dali-vector.h>
#include <dali/public-api/math/vector2.h>
+#include <resampler.h>
+#include <image-loading.h>
// INTERNAL INCLUDES
// A maximum size limit for newly created bitmaps. ( 1u << 16 ) - 1 is chosen as we are using 16bit words for dimensions.
const unsigned int MAXIMUM_TARGET_BITMAP_SIZE( ( 1u << 16 ) - 1 );
+// Constants used by the ImageResampler.
+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 Resampler::Filter FILTER_TYPE = Resampler::LANCZOS4; ///< Default filter used in the Resampler() function. Possible Lanczos filters are: lanczos3, lanczos4, lanczos6, lanczos12
+
using Integration::Bitmap;
using Integration::BitmapPtr;
typedef unsigned char PixelBuffer;
DALI_ASSERT_DEBUG( scanline2 && "Null pointer." );
DALI_ASSERT_DEBUG( outputScanline && "Null pointer." );
DALI_ASSERT_DEBUG( ((scanline1 >= scanline2 + widthInComponents) || (scanline2 >= scanline1 + widthInComponents )) && "Scanlines alias." );
- DALI_ASSERT_DEBUG( ((((void*)outputScanline) >= (void*)(scanline2 + widthInComponents)) || (((void*)scanline2) >= (void*)(scanline1 + widthInComponents))) && "Scanline 2 aliases output." );
+ DALI_ASSERT_DEBUG( ((outputScanline >= (scanline2 + widthInComponents)) || (scanline2 >= (scanline1 + widthInComponents))) && "Scanline 2 aliases output." );
}
/**
*/
ImageDimensions CalculateDesiredDimensions( unsigned int bitmapWidth, unsigned int bitmapHeight, unsigned int requestedWidth, unsigned int requestedHeight )
{
+ unsigned int maxSize = Dali::GetMaxTextureSize();
+
// If no dimensions have been requested, default to the source ones:
if( requestedWidth == 0 && requestedHeight == 0 )
{
- return ImageDimensions( bitmapWidth, bitmapHeight );
+ return ImageDimensions( std::min( bitmapWidth, maxSize ), std::min( bitmapHeight, maxSize ) );
}
// If both dimensions have values requested, use them both:
if( requestedWidth != 0 && requestedHeight != 0 )
{
- return ImageDimensions( requestedWidth, requestedHeight );
+ return ImageDimensions( std::min( requestedWidth, maxSize ), std::min( requestedHeight, maxSize ) );
}
// Only one of the dimensions has been requested. Calculate the other from
// the requested one and the source image aspect ratio:
if( requestedWidth != 0 )
{
+ requestedWidth = std::min( requestedWidth, maxSize );
return ImageDimensions( requestedWidth, bitmapHeight / float(bitmapWidth) * requestedWidth + 0.5f );
}
+
+ requestedHeight = std::min( requestedHeight, maxSize );
return ImageDimensions( bitmapWidth / float(bitmapHeight) * requestedHeight + 0.5f, requestedHeight );
}
DALI_ASSERT_DEBUG( ((desiredWidth <= inputWidth && desiredHeight <= inputHeight) ||
outPixels >= inPixels + inputWidth * inputHeight * sizeof(PIXEL) || outPixels <= inPixels - desiredWidth * desiredHeight * sizeof(PIXEL)) &&
"The input and output buffers must not overlap for an upscaling.");
- DALI_ASSERT_DEBUG( ((uint64_t) inPixels) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
- DALI_ASSERT_DEBUG( ((uint64_t) outPixels) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
+ DALI_ASSERT_DEBUG( reinterpret_cast< uint64_t >( inPixels ) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
+ DALI_ASSERT_DEBUG( reinterpret_cast< uint64_t >( outPixels ) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
if( inputWidth < 1u || inputHeight < 1u || desiredWidth < 1u || desiredHeight < 1u )
{
"Input and output buffers cannot overlap.");
if( DEBUG_ASSERT_ALIGNMENT )
{
- DALI_ASSERT_DEBUG( ((uint64_t) inPixels) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
- DALI_ASSERT_DEBUG( ((uint64_t) outPixels) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
+ DALI_ASSERT_DEBUG( reinterpret_cast< uint64_t >( inPixels ) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
+ DALI_ASSERT_DEBUG( reinterpret_cast< uint64_t >( outPixels) % sizeof(PIXEL) == 0 && "Pixel pointers need to be aligned to the size of the pixels (E.g., 4 bytes for RGBA, 2 bytes for RGB565, ...)." );
}
if( inputWidth < 1u || inputHeight < 1u || desiredWidth < 1u || desiredHeight < 1u )
LinearSampleGeneric<Pixel4Bytes, BilinearFilter4Bytes, true>( inPixels, inputDimensions, outPixels, desiredDimensions );
}
+void LanczosSample( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions,
+ int numChannels, bool hasAlpha )
+{
+ // Got from the test.cpp of the ImageResampler lib.
+ const float ONE_DIV_255 = 1.0f / 255.0f;
+ const int MAX_UNSIGNED_CHAR = std::numeric_limits<uint8_t>::max();
+ const int LINEAR_TO_SRGB_TABLE_SIZE = 4096;
+ const int ALPHA_CHANNEL = hasAlpha ? (numChannels-1) : 0;
+
+ static bool loadColorSpaces = true;
+ static float srgbToLinear[MAX_UNSIGNED_CHAR + 1];
+ static unsigned char linearToSrgb[LINEAR_TO_SRGB_TABLE_SIZE];
+
+ if( loadColorSpaces ) // Only create the color space conversions on the first execution
+ {
+ loadColorSpaces = false;
+
+ for( int i = 0; i <= MAX_UNSIGNED_CHAR; ++i )
+ {
+ srgbToLinear[i] = pow( static_cast<float>( i ) * ONE_DIV_255, DEFAULT_SOURCE_GAMMA );
+ }
+
+ const float invLinearToSrgbTableSize = 1.0f / static_cast<float>( LINEAR_TO_SRGB_TABLE_SIZE );
+ const float invSourceGamma = 1.0f / DEFAULT_SOURCE_GAMMA;
+
+ for( int i = 0; i < LINEAR_TO_SRGB_TABLE_SIZE; ++i )
+ {
+ int k = static_cast<int>( 255.0f * pow( static_cast<float>( i ) * invLinearToSrgbTableSize, invSourceGamma ) + 0.5f );
+ if( k < 0 )
+ {
+ k = 0;
+ }
+ else if( k > MAX_UNSIGNED_CHAR )
+ {
+ k = MAX_UNSIGNED_CHAR;
+ }
+ linearToSrgb[i] = static_cast<unsigned char>( k );
+ }
+ }
+
+ Resampler* resamplers[numChannels];
+ Vector<float> samples[numChannels];
+
+ const int srcWidth = inputDimensions.GetWidth();
+ const int srcHeight = inputDimensions.GetHeight();
+ const int dstWidth = desiredDimensions.GetWidth();
+ const int dstHeight = desiredDimensions.GetHeight();
+
+ // Now create a Resampler instance for each component to process. The first instance will create new contributor tables, which are shared by the resamplers
+ // used for the other components (a memory and slight cache efficiency optimization).
+ resamplers[0] = new Resampler( srcWidth,
+ srcHeight,
+ dstWidth,
+ dstHeight,
+ Resampler::BOUNDARY_CLAMP,
+ 0.0f, // sample_low,
+ 1.0f, // sample_high. Clamp output samples to specified range, or disable clamping if sample_low >= sample_high.
+ FILTER_TYPE, // The type of filter. Currently Lanczos.
+ NULL, // Pclist_x,
+ NULL, // Pclist_y. Optional pointers to contributor lists from another instance of a Resampler.
+ FILTER_SCALE, // src_x_ofs,
+ FILTER_SCALE ); // src_y_ofs. Offset input image by specified amount (fractional values okay).
+ samples[0].Resize( srcWidth );
+ for( int i = 1; i < numChannels; ++i )
+ {
+ resamplers[i] = new Resampler( srcWidth,
+ srcHeight,
+ dstWidth,
+ dstHeight,
+ Resampler::BOUNDARY_CLAMP,
+ 0.0f,
+ 1.0f,
+ FILTER_TYPE,
+ resamplers[0]->get_clist_x(),
+ resamplers[0]->get_clist_y(),
+ FILTER_SCALE,
+ FILTER_SCALE );
+ samples[i].Resize( srcWidth );
+ }
+
+ const int srcPitch = srcWidth * numChannels;
+ const int dstPitch = dstWidth * numChannels;
+ int dstY = 0;
+
+ for( int srcY = 0; srcY < srcHeight; ++srcY )
+ {
+ const unsigned char* pSrc = &inPixels[srcY * srcPitch];
+
+ for( int x = 0; x < srcWidth; ++x )
+ {
+ for( int c = 0; c < numChannels; ++c )
+ {
+ if( c == ALPHA_CHANNEL && hasAlpha )
+ {
+ samples[c][x] = *pSrc++ * ONE_DIV_255;
+ }
+ else
+ {
+ samples[c][x] = srgbToLinear[*pSrc++];
+ }
+ }
+ }
+
+ for( int c = 0; c < numChannels; ++c )
+ {
+ if( !resamplers[c]->put_line( &samples[c][0] ) )
+ {
+ DALI_ASSERT_DEBUG( !"Out of memory" );
+ }
+ }
+
+ for(;;)
+ {
+ int compIndex;
+ for( compIndex = 0; compIndex < numChannels; ++compIndex )
+ {
+ const float* pOutputSamples = resamplers[compIndex]->get_line();
+ if( !pOutputSamples )
+ {
+ break;
+ }
+
+ const bool isAlphaChannel = ( compIndex == ALPHA_CHANNEL && hasAlpha );
+ DALI_ASSERT_DEBUG( dstY < dstHeight );
+ unsigned char* pDst = &outPixels[dstY * dstPitch + compIndex];
+
+ for( int x = 0; x < dstWidth; ++x )
+ {
+ if( isAlphaChannel )
+ {
+ int c = static_cast<int>( 255.0f * pOutputSamples[x] + 0.5f );
+ if( c < 0 )
+ {
+ c = 0;
+ }
+ else if( c > MAX_UNSIGNED_CHAR )
+ {
+ c = MAX_UNSIGNED_CHAR;
+ }
+ *pDst = static_cast<unsigned char>( c );
+ }
+ else
+ {
+ int j = static_cast<int>( LINEAR_TO_SRGB_TABLE_SIZE * pOutputSamples[x] + 0.5f );
+ if( j < 0 )
+ {
+ j = 0;
+ }
+ else if( j >= LINEAR_TO_SRGB_TABLE_SIZE )
+ {
+ j = LINEAR_TO_SRGB_TABLE_SIZE - 1;
+ }
+ *pDst = linearToSrgb[j];
+ }
+
+ pDst += numChannels;
+ }
+ }
+ if( compIndex < numChannels )
+ {
+ break;
+ }
+
+ ++dstY;
+ }
+ }
+
+ // Delete the resamplers.
+ for( int i = 0; i < numChannels; ++i )
+ {
+ delete resamplers[i];
+ }
+}
+
+void LanczosSample4BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions )
+{
+ LanczosSample( inPixels, inputDimensions, outPixels, desiredDimensions, 4, true );
+}
+
+void LanczosSample1BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions )
+{
+ // For L8 images
+ LanczosSample( inPixels, inputDimensions, outPixels, desiredDimensions, 1, false );
+}
+
// Dispatch to a format-appropriate linear sampling function:
void LinearSample( const unsigned char * __restrict__ inPixels,
ImageDimensions inDimensions,
projects / platform / core / uifw / dali-adaptor.git / blobdiff