#include <dali/public-api/common/dali-vector.h>
#include <dali/public-api/math/vector2.h>
#include <resampler.h>
+#include <image-loading.h>
// INTERNAL INCLUDES
// 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;
*/
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 );
+ if( bitmapWidth <= maxSize && bitmapHeight <= maxSize )
+ {
+ return ImageDimensions( bitmapWidth, bitmapHeight );
+ }
+ else
+ {
+ // Calculate the size from the max texture size and the source image aspect ratio
+ if( bitmapWidth > bitmapHeight )
+ {
+ return ImageDimensions( maxSize, bitmapHeight * maxSize / static_cast< float >( bitmapWidth ) + 0.5f );
+ }
+ else
+ {
+ return ImageDimensions( bitmapWidth * maxSize / static_cast< float >( bitmapHeight ) + 0.5f, maxSize );
+ }
+ }
}
// If both dimensions have values requested, use them both:
if( requestedWidth != 0 && requestedHeight != 0 )
{
- return ImageDimensions( requestedWidth, requestedHeight );
+ if( requestedWidth <= maxSize && requestedWidth <= maxSize )
+ {
+ return ImageDimensions( requestedWidth, requestedHeight );
+ }
+ else
+ {
+ // Calculate the size from the max texture size and the source image aspect ratio
+ if( requestedWidth > requestedHeight )
+ {
+ return ImageDimensions( maxSize, requestedHeight * maxSize / static_cast< float >( requestedWidth ) + 0.5f );
+ }
+ else
+ {
+ return ImageDimensions( requestedWidth * maxSize / static_cast< float >( requestedHeight ) + 0.5f, 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 );
}
LinearSampleGeneric<Pixel4Bytes, BilinearFilter4Bytes, true>( inPixels, inputDimensions, outPixels, desiredDimensions );
}
-void LanczosSample4BPP( const unsigned char * __restrict__ inPixels,
- ImageDimensions inputDimensions,
- unsigned char * __restrict__ outPixels,
- ImageDimensions desiredDimensions )
+
+void Resample( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions,
+ Resampler::Filter filterType,
+ 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 = 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 );
- }
+ const int ALPHA_CHANNEL = hasAlpha ? (numChannels-1) : 0;
- unsigned char linearToSrgb[LINEAR_TO_SRGB_TABLE_SIZE];
+ static bool loadColorSpaces = true;
+ static float srgbToLinear[MAX_UNSIGNED_CHAR + 1];
+ static 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 )
+ if( loadColorSpaces ) // Only create the color space conversions on the first execution
{
- int k = static_cast<int>( 255.0f * pow( static_cast<float>( i ) * invLinearToSrgbTableSize, invSourceGamma ) + 0.5f );
- if( k < 0 )
+ loadColorSpaces = false;
+
+ for( int i = 0; i <= MAX_UNSIGNED_CHAR; ++i )
{
- k = 0;
+ srgbToLinear[i] = pow( static_cast<float>( i ) * ONE_DIV_255, DEFAULT_SOURCE_GAMMA );
}
- else if( k > MAX_UNSIGNED_CHAR )
+
+ 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 )
{
- k = MAX_UNSIGNED_CHAR;
+ 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 );
}
- linearToSrgb[i] = static_cast<unsigned char>( k );
}
- Resampler* resamplers[NUMBER_OF_CHANNELS] = { 0 };
- Vector<float> samples[NUMBER_OF_CHANNELS];
+ Resampler* resamplers[numChannels];
+ Vector<float> samples[numChannels];
const int srcWidth = inputDimensions.GetWidth();
const int srcHeight = inputDimensions.GetHeight();
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.
+ filterType, // The type of filter.
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 )
+ for( int i = 1; i < numChannels; ++i )
{
resamplers[i] = new Resampler( srcWidth,
srcHeight,
Resampler::BOUNDARY_CLAMP,
0.0f,
1.0f,
- FILTER_TYPE,
+ filterType,
resamplers[0]->get_clist_x(),
resamplers[0]->get_clist_y(),
FILTER_SCALE,
samples[i].Resize( srcWidth );
}
- const int srcPitch = srcWidth * NUMBER_OF_CHANNELS;
- const int dstPitch = dstWidth * NUMBER_OF_CHANNELS;
+ const int srcPitch = srcWidth * numChannels;
+ const int dstPitch = dstWidth * numChannels;
int dstY = 0;
for( int srcY = 0; srcY < srcHeight; ++srcY )
for( int x = 0; x < srcWidth; ++x )
{
- for( int c = 0; c < NUMBER_OF_CHANNELS; ++c )
+ for( int c = 0; c < numChannels; ++c )
{
- if( c == ALPHA_CHANNEL )
+ if( c == ALPHA_CHANNEL && hasAlpha )
{
samples[c][x] = *pSrc++ * ONE_DIV_255;
}
}
}
- for( int c = 0; c < NUMBER_OF_CHANNELS; ++c )
+ for( int c = 0; c < numChannels; ++c )
{
if( !resamplers[c]->put_line( &samples[c][0] ) )
{
for(;;)
{
int compIndex;
- for( compIndex = 0; compIndex < NUMBER_OF_CHANNELS; ++compIndex )
+ for( compIndex = 0; compIndex < numChannels; ++compIndex )
{
const float* pOutputSamples = resamplers[compIndex]->get_line();
if( !pOutputSamples )
break;
}
- const bool isAlphaChannel = ( compIndex == ALPHA_CHANNEL );
+ const bool isAlphaChannel = ( compIndex == ALPHA_CHANNEL && hasAlpha );
DALI_ASSERT_DEBUG( dstY < dstHeight );
unsigned char* pDst = &outPixels[dstY * dstPitch + compIndex];
*pDst = linearToSrgb[j];
}
- pDst += NUMBER_OF_CHANNELS;
+ pDst += numChannels;
}
}
- if( compIndex < NUMBER_OF_CHANNELS )
+ if( compIndex < numChannels )
{
break;
}
}
// Delete the resamplers.
- for( int i = 0; i < NUMBER_OF_CHANNELS; ++i )
+ 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 )
+{
+ Resample( inPixels, inputDimensions, outPixels, desiredDimensions, Resampler::LANCZOS4, 4, true );
+}
+
+void LanczosSample1BPP( const unsigned char * __restrict__ inPixels,
+ ImageDimensions inputDimensions,
+ unsigned char * __restrict__ outPixels,
+ ImageDimensions desiredDimensions )
+{
+ // For L8 images
+ Resample( inPixels, inputDimensions, outPixels, desiredDimensions, Resampler::LANCZOS4, 1, false );
+}
+
// Dispatch to a format-appropriate linear sampling function:
void LinearSample( const unsigned char * __restrict__ inPixels,
ImageDimensions inDimensions,