#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>
// 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 char* const FILTER_TYPE = "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;
LinearSampleGeneric<Pixel4Bytes, BilinearFilter4Bytes, true>( inPixels, inputDimensions, outPixels, desiredDimensions );
}
+void LanczosSample4BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions )
+{
+ // 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 = 3;
+ const int NUMBER_OF_CHANNELS = 4;
+
+ float srgbToLinear[MAX_UNSIGNED_CHAR + 1];
+ for( int i = 0; i <= MAX_UNSIGNED_CHAR; ++i )
+ {
+ srgbToLinear[i] = pow( static_cast<float>( i ) * ONE_DIV_255, DEFAULT_SOURCE_GAMMA );
+ }
+
+ unsigned char linearToSrgb[LINEAR_TO_SRGB_TABLE_SIZE];
+
+ 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[NUMBER_OF_CHANNELS] = { 0 };
+ Vector<float> samples[NUMBER_OF_CHANNELS];
+
+ 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 < NUMBER_OF_CHANNELS; ++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 * NUMBER_OF_CHANNELS;
+ const int dstPitch = dstWidth * NUMBER_OF_CHANNELS;
+ 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 < NUMBER_OF_CHANNELS; ++c )
+ {
+ if( c == ALPHA_CHANNEL )
+ {
+ samples[c][x] = *pSrc++ * ONE_DIV_255;
+ }
+ else
+ {
+ samples[c][x] = srgbToLinear[*pSrc++];
+ }
+ }
+ }
+
+ for( int c = 0; c < NUMBER_OF_CHANNELS; ++c )
+ {
+ if( !resamplers[c]->put_line( &samples[c][0] ) )
+ {
+ DALI_ASSERT_DEBUG( !"Out of memory" );
+ }
+ }
+
+ for(;;)
+ {
+ int compIndex;
+ for( compIndex = 0; compIndex < NUMBER_OF_CHANNELS; ++compIndex )
+ {
+ const float* pOutputSamples = resamplers[compIndex]->get_line();
+ if( !pOutputSamples )
+ {
+ break;
+ }
+
+ const bool isAlphaChannel = ( compIndex == ALPHA_CHANNEL );
+ 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 += NUMBER_OF_CHANNELS;
+ }
+ }
+ if( compIndex < NUMBER_OF_CHANNELS )
+ {
+ break;
+ }
+
+ ++dstY;
+ }
+ }
+
+ // Delete the resamplers.
+ for( int i = 0; i < NUMBER_OF_CHANNELS; ++i )
+ {
+ delete resamplers[i];
+ }
+}
+
// Dispatch to a format-appropriate linear sampling function:
void LinearSample( const unsigned char * __restrict__ inPixels,
ImageDimensions inDimensions,
#include <dali/integration-api/debug.h>
#include <dali/integration-api/platform-abstraction.h>
#include <dali/internal/text-abstraction/font-client-helper.h>
+#include <platform-abstractions/portable/image-operations.h>
#include <adaptor-impl.h>
// EXTERNAL INCLUDES
void FontClient::Plugin::CreateBitmap( FontId fontId, GlyphIndex glyphIndex, Dali::TextAbstraction::FontClient::GlyphBufferData& data )
{
- if( ( fontId > 0u ) &&
+ if( ( fontId > 0 ) &&
( fontId - 1u < mFontCache.size() ) )
{
FT_Face ftFace = mFontCache[fontId - 1u].mFreeTypeFace;
FT_Error error = -1;
#ifdef FREETYPE_BITMAP_SUPPORT
- if( ( fontId > 0u ) &&
+ if( ( fontId > 0 ) &&
( fontId - 1u < mFontCache.size() ) )
{
const FontFaceCacheItem& item = mFontCache[fontId - 1u];
{
if( srcBitmap.pitch == static_cast<int>( srcBitmap.width << 2u ) )
{
- const unsigned int bufferSize = srcBitmap.width * srcBitmap.rows * 4u;
- data.buffer = new unsigned char[bufferSize];
- data.width = srcBitmap.width;
- data.height = srcBitmap.rows;
+ // Set the input dimensions.
+ const ImageDimensions inputDimensions( srcBitmap.width, srcBitmap.rows );
+
+ // Set the output dimensions.
+ // If the output dimension is not given, the input dimension is set
+ // and won't be downscaling.
+ data.width = ( data.width == 0 ) ? srcBitmap.width : data.width;
+ data.height = ( data.height == 0 ) ? srcBitmap.rows : data.height;
+ const ImageDimensions desiredDimensions( data.width, data.height );
+
+ // Creates the output buffer
+ const unsigned int bufferSize = data.width * data.height * 4u;
+ data.buffer = new unsigned char[bufferSize]; // @note The caller is responsible for deallocating the bitmap data using delete[].
+
+ if( inputDimensions == desiredDimensions )
+ {
+ // There isn't downscaling.
+ memcpy( data.buffer, srcBitmap.buffer, bufferSize );
+ }
+ else
+ {
+ Dali::Internal::Platform::LanczosSample4BPP( srcBitmap.buffer,
+ inputDimensions,
+ data.buffer,
+ desiredDimensions );
+ }
data.format = Pixel::BGRA8888;
- memcpy( data.buffer, srcBitmap.buffer, bufferSize );
}
break;
}
projects / platform / core / uifw / dali-adaptor.git / commitdiff