/*
- * Copyright (c) 2016 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.
// EXTERNAL INCLUDES
#include <dali/devel-api/text-abstraction/font-client.h>
#include <memory.h>
+#include <dali/public-api/common/constants.h>
// INTERNAL INCLUDES
#include <dali-toolkit/internal/text/rendering/view-model.h>
*/
struct GlyphData
{
- uint32_t* bitmapBuffer; ///< The buffer of the whole bitmap. The format is RGBA8888.
+ Devel::PixelBuffer bitmapBuffer; ///< The buffer of the whole bitmap. The format is RGBA8888.
Vector2* position; ///< The position of the glyph.
TextAbstraction::FontClient::GlyphBufferData glyphBitmap; ///< The glyph's bitmap.
unsigned int width; ///< The bitmap's width.
* @param[in] data Struct which contains the glyph's data and the bitmap's data.
* @param[in] position The position of the glyph.
* @param[in] color The color of the glyph.
+ * @param[in] style The style of the text.
*/
-void TypesetGlyph( const GlyphData& data,
+void TypesetGlyph( GlyphData& data,
const Vector2* const position,
- const Vector4* const color )
+ const Vector4* const color,
+ Typesetter::Style style)
{
if( ( 0u == data.glyphBitmap.width ) || ( 0u == data.glyphBitmap.height ) )
{
break;
}
+ uint32_t* bitmapBuffer = reinterpret_cast< uint32_t* >( data.bitmapBuffer.GetBuffer() );
+
if( isColorGlyph )
{
- // Retrieves the color from the glyph. The format is BGRA8888.
+ // Retrieves the color from the color glyph. The format is BGRA8888.
uint32_t packedColorGlyph = *( colorGlyphBuffer + glyphBufferOffset + index );
+ uint8_t* packedColorGlyphBuffer = reinterpret_cast<uint8_t*>( &packedColorGlyph );
+
+ if( Typesetter::STYLE_SHADOW == style )
+ {
+ // The shadow of color glyph needs to have the shadow color.
+ *( packedColorGlyphBuffer + 2 ) = static_cast<uint8_t>( color->b * 255.f );
+ *( packedColorGlyphBuffer + 1 ) = static_cast<uint8_t>( color->g * 255.f );
+ *packedColorGlyphBuffer = static_cast<uint8_t>( color->r * 255.f );
+ }
+ else
+ {
+ std::swap( *packedColorGlyphBuffer, *( packedColorGlyphBuffer + 2u ) ); // Swap B and R.
+ }
// Update the alpha channel.
- uint8_t* packedColorGlyphBuffer = reinterpret_cast<uint8_t*>( &packedColorGlyph );
- std::swap( *packedColorGlyphBuffer, *( packedColorGlyphBuffer + 2u ) ); // Swap B and R.
- *( packedColorGlyphBuffer + 3u ) = static_cast<uint8_t>( color->a * static_cast<float>( *( packedColorGlyphBuffer + 3u ) ) );
+ if( Typesetter::STYLE_MASK == style )
+ {
+ // Create an alpha mask for color glyph.
+ *( packedColorGlyphBuffer + 3u ) = 0u;
+ }
+ else
+ {
+ *( packedColorGlyphBuffer + 3u ) = static_cast<uint8_t>( color->a * static_cast<float>( *( packedColorGlyphBuffer + 3u ) ) );
+ }
// Set the color into the final pixel buffer.
- *( data.bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColorGlyph;
+ *( bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColorGlyph;
}
else
{
*( packedColorBuffer + 3u ) = static_cast<uint8_t>( color->a * static_cast<float>( alpha ) );
// Set the color into the final pixel buffer.
- *( data.bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColor;
+ *( bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColor;
}
}
}
}
+bool IsGlyphUnderlined( GlyphIndex index,
+ const Vector<GlyphRun>& underlineRuns )
+{
+ for( Vector<GlyphRun>::ConstIterator it = underlineRuns.Begin(),
+ endIt = underlineRuns.End();
+ it != endIt;
+ ++it )
+ {
+ const GlyphRun& run = *it;
+
+ if( ( run.glyphIndex <= index ) && ( index < run.glyphIndex + run.numberOfGlyphs ) )
+ {
+ return true;
+ }
+ }
+
+ return false;
+}
+
} // namespace
TypesetterPtr Typesetter::New( const ModelInterface* const model )
return mModel;
}
-PixelData Typesetter::Render( const Vector2& size )
+PixelData Typesetter::Render( const Vector2& size, RenderBehaviour behaviour, bool ignoreHorizontalAlignment )
{
// @todo. This initial implementation for a TextLabel has only one visible page.
}
}
+ // Generate the image buffers of the text for each different style first,
+ // then combine all of them together as one final image buffer. We try to
+ // do all of these in CPU only, so that once the final texture is generated,
+ // no calculation is needed in GPU during each frame.
+
+ const unsigned int bufferWidth = static_cast<unsigned int>( size.width );
+ const unsigned int bufferHeight = static_cast<unsigned int>( size.height );
+
+ const unsigned int bufferSizeInt = bufferWidth * bufferHeight;
+ const unsigned int bufferSizeChar = 4u * bufferSizeInt;
+
+ Length numberOfGlyphs = mModel->GetNumberOfGlyphs();
+
+ Devel::PixelBuffer imageBuffer;
+
+ if( RENDER_MASK == behaviour )
+ {
+ // Generate the image buffer as an alpha mask for color glyphs.
+ imageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_MASK, ignoreHorizontalAlignment, penY, 0u, numberOfGlyphs - 1 );
+ }
+ else if( RENDER_NO_TEXT == behaviour )
+ {
+ // Generate an empty image buffer so that it can been combined with the image buffers for styles
+ imageBuffer = Devel::PixelBuffer::New( bufferWidth, bufferHeight, Pixel::RGBA8888 );
+ memset( imageBuffer.GetBuffer(), 0u, bufferSizeChar );
+ }
+ else
+ {
+ // Generate the image buffer for the text with no style.
+ imageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_NONE, ignoreHorizontalAlignment, penY, 0u, numberOfGlyphs -1 );
+ }
+
+ if ( ( RENDER_NO_STYLES != behaviour ) && ( RENDER_MASK != behaviour ) )
+ {
+ // @todo. Support shadow and underline for partial text later on.
+
+ // Generate the shadow if enabled
+ const Vector2& shadowOffset = mModel->GetShadowOffset();
+ if ( fabsf( shadowOffset.x ) > Math::MACHINE_EPSILON_1 || fabsf( shadowOffset.y ) > Math::MACHINE_EPSILON_1 )
+ {
+ // Create the image buffer for shadow
+ Devel::PixelBuffer shadowImageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_SHADOW, ignoreHorizontalAlignment, penY, 0u, numberOfGlyphs - 1 );
+
+ // Combine the two buffers
+ imageBuffer = CombineImageBuffer( imageBuffer, shadowImageBuffer, bufferWidth, bufferHeight );
+ }
+
+ // Generate the underline if enabled
+ const bool underlineEnabled = mModel->IsUnderlineEnabled();
+ if ( underlineEnabled )
+ {
+ // Create the image buffer for underline
+ Devel::PixelBuffer underlineImageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_UNDERLINE, ignoreHorizontalAlignment, penY, 0u, numberOfGlyphs - 1 );
+
+ // Combine the two buffers
+ imageBuffer = CombineImageBuffer( imageBuffer, underlineImageBuffer, bufferWidth, bufferHeight );
+ }
+ }
+
+ // Create the final PixelData for the combined image buffer
+ PixelData pixelData = Devel::PixelBuffer::Convert( imageBuffer );
+
+ return pixelData;
+}
+
+Devel::PixelBuffer Typesetter::CreateImageBuffer( const unsigned int bufferWidth, const unsigned int bufferHeight, Typesetter::Style style, bool ignoreHorizontalAlignment, int verticalOffset, GlyphIndex fromGlyphIndex, GlyphIndex toGlyphIndex )
+{
// Retrieve lines, glyphs, positions and colors from the view model.
const Length modelNumberOfLines = mModel->GetNumberOfLines();
const LineRun* const modelLinesBuffer = mModel->GetLines();
const ColorIndex* const colorIndexBuffer = mModel->GetColorIndices();
// Whether to use the default color.
- const bool useDefaultColor = NULL == colorsBuffer;
+ const bool useDefaultColor = ( NULL == colorsBuffer );
const Vector4& defaultColor = mModel->GetDefaultColor();
// Create and initialize the pixel buffer.
GlyphData glyphData;
- glyphData.verticalOffset = penY;
+ glyphData.verticalOffset = verticalOffset;
- glyphData.width = static_cast<unsigned int>( size.width );
- glyphData.height = static_cast<unsigned int>( size.height );
- const unsigned int bufferSizeInt = glyphData.width * glyphData.height;
+ glyphData.width = bufferWidth;
+ glyphData.height = bufferHeight;
+ const unsigned int bufferSizeInt = bufferWidth * bufferHeight;
const unsigned int bufferSizeChar = 4u * bufferSizeInt;
- glyphData.bitmapBuffer = new uint32_t[ bufferSizeInt ]; // This array will get deleted by PixelData because of the DELETE_ARRAY parameter.
- memset( glyphData.bitmapBuffer, 0u, bufferSizeChar );
-
- PixelData pixelData = PixelData::New( reinterpret_cast<uint8_t*>( glyphData.bitmapBuffer ),
- bufferSizeChar,
- glyphData.width,
- glyphData.height,
- Pixel::RGBA8888, // The format is RGBA8888 because is the format accepted by the image atlas manager.
- PixelData::DELETE_ARRAY );
+ glyphData.bitmapBuffer = Devel::PixelBuffer::New( bufferWidth, bufferHeight, Pixel::RGBA8888 );
+ memset( glyphData.bitmapBuffer.GetBuffer(), 0u, bufferSizeChar );
// Get a handle of the font client. Used to retrieve the bitmaps of the glyphs.
TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
const LineRun& line = *( modelLinesBuffer + lineIndex );
// Sets the horizontal offset of the line.
- glyphData.horizontalOffset = static_cast<int>( line.alignmentOffset );
+ glyphData.horizontalOffset = ignoreHorizontalAlignment ? 0 : static_cast<int>( line.alignmentOffset );
// Increases the vertical offset with the line's ascender.
glyphData.verticalOffset += static_cast<int>( line.ascender );
+ if ( style == Typesetter::STYLE_SHADOW )
+ {
+ const Vector2& shadowOffset = mModel->GetShadowOffset();
+ glyphData.horizontalOffset += shadowOffset.x;
+ if ( lineIndex == 0u )
+ {
+ // Only need to add the vertical shadow offset for once
+ glyphData.verticalOffset += shadowOffset.y;
+ }
+ }
+
+ const bool underlineEnabled = mModel->IsUnderlineEnabled();
+ const Vector4& underlineColor = mModel->GetUnderlineColor();
+ const float underlineHeight = mModel->GetUnderlineHeight();
+
+ // Get the underline runs.
+ const Length numberOfUnderlineRuns = mModel->GetNumberOfUnderlineRuns();
+ Vector<GlyphRun> underlineRuns;
+ underlineRuns.Resize( numberOfUnderlineRuns );
+ mModel->GetUnderlineRuns( underlineRuns.Begin(), 0u, numberOfUnderlineRuns );
+
+ bool thereAreUnderlinedGlyphs = false;
+
+ float currentUnderlinePosition = 0.0f;
+ float currentUnderlineThickness = underlineHeight;
+ float maxUnderlineThickness = currentUnderlineThickness;
+
+ FontId lastUnderlinedFontId = 0;
+
+ float lineExtentLeft = bufferWidth;
+ float lineExtentRight = 0.0f;
+ float baseline = 0.0f;
+
// Traverses the glyphs of the line.
const GlyphIndex endGlyphIndex = std::min( numberOfGlyphs, line.glyphRun.glyphIndex + line.glyphRun.numberOfGlyphs );
for( GlyphIndex glyphIndex = line.glyphRun.glyphIndex; glyphIndex < endGlyphIndex; ++glyphIndex )
{
+ if ( glyphIndex < fromGlyphIndex || glyphIndex > toGlyphIndex )
+ {
+ // Ignore any glyph that out of the specified range
+ continue;
+ }
+
// Retrieve the glyph's info.
const GlyphInfo* const glyphInfo = glyphsBuffer + glyphIndex;
continue;
}
+ const bool underlineGlyph = underlineEnabled || IsGlyphUnderlined( glyphIndex, underlineRuns );
+ thereAreUnderlinedGlyphs = thereAreUnderlinedGlyphs || underlineGlyph;
+
+ // Are we still using the same fontId as previous
+ if( underlineGlyph && ( glyphInfo->fontId != lastUnderlinedFontId ) )
+ {
+ // We need to fetch fresh font underline metrics
+ FontMetrics fontMetrics;
+ fontClient.GetFontMetrics( glyphInfo->fontId, fontMetrics );
+ currentUnderlinePosition = ceil( fabsf( fontMetrics.underlinePosition ) );
+ const float descender = ceil( fabsf( fontMetrics.descender ) );
+
+ if( fabsf( underlineHeight ) < Math::MACHINE_EPSILON_1000 )
+ {
+ currentUnderlineThickness = fontMetrics.underlineThickness;
+
+ // Ensure underline will be at least a pixel high
+ if ( currentUnderlineThickness < 1.0f )
+ {
+ currentUnderlineThickness = 1.0f;
+ }
+ else
+ {
+ currentUnderlineThickness = ceil( currentUnderlineThickness );
+ }
+ }
+
+ // The underline thickness should be the max underline thickness of all glyphs of the line.
+ if ( currentUnderlineThickness > maxUnderlineThickness )
+ {
+ maxUnderlineThickness = currentUnderlineThickness;
+ }
+
+ // Clamp the underline position at the font descender and check for ( as EFL describes it ) a broken font
+ if( currentUnderlinePosition > descender )
+ {
+ currentUnderlinePosition = descender;
+ }
+
+ if( fabsf( currentUnderlinePosition ) < Math::MACHINE_EPSILON_1000 )
+ {
+ // Move offset down by one ( EFL behavior )
+ currentUnderlinePosition = 1.0f;
+ }
+
+ lastUnderlinedFontId = glyphInfo->fontId;
+ } // underline
+
// Retrieves the glyph's position.
const Vector2* const position = positionBuffer + glyphIndex;
+ if ( baseline < position->y + glyphInfo->yBearing )
+ {
+ baseline = position->y + glyphInfo->yBearing;
+ }
+
+ // Calculate the positions of leftmost and rightmost glyphs in the current line
+ if ( position->x < lineExtentLeft)
+ {
+ lineExtentLeft = position->x;
+ }
+
+ if ( position->x + glyphInfo->width > lineExtentRight)
+ {
+ lineExtentRight = position->x + glyphInfo->width;
+ }
// Retrieves the glyph's color.
const ColorIndex colorIndex = *( colorIndexBuffer + glyphIndex );
- const Vector4* const color = ( useDefaultColor || ( 0u == colorIndex ) ) ? &defaultColor : colorsBuffer + ( colorIndex - 1u );
+
+ const Vector4* color;
+ if ( style == Typesetter::STYLE_SHADOW )
+ {
+ color = &( mModel->GetShadowColor() );
+ }
+ else
+ {
+ color = ( useDefaultColor || ( 0u == colorIndex ) ) ? &defaultColor : colorsBuffer + ( colorIndex - 1u );
+ }
// Retrieves the glyph's bitmap.
glyphData.glyphBitmap.buffer = NULL;
+ glyphData.glyphBitmap.width = glyphInfo->width; // Desired width and height.
+ glyphData.glyphBitmap.height = glyphInfo->height;
fontClient.CreateBitmap( glyphInfo->fontId,
glyphInfo->index,
glyphData.glyphBitmap );
{
TypesetGlyph( glyphData,
position,
- color );
+ color,
+ style );
+ // delete the glyphBitmap.buffer as it is now copied into glyphData.bitmapBuffer
+ delete []glyphData.glyphBitmap.buffer;
+ glyphData.glyphBitmap.buffer = NULL;
+ }
+ }
+
+ // Draw the underline from the leftmost glyph to the rightmost glyph
+ if ( thereAreUnderlinedGlyphs && style == Typesetter::STYLE_UNDERLINE )
+ {
+ int underlineYOffset = glyphData.verticalOffset + baseline + currentUnderlinePosition;
+
+ for( unsigned int y = underlineYOffset; y < underlineYOffset + maxUnderlineThickness; y++ )
+ {
+ if( ( y < 0 ) || ( y > bufferHeight - 1 ) )
+ {
+ // Do not write out of bounds.
+ break;
+ }
+
+ for( unsigned int x = glyphData.horizontalOffset + lineExtentLeft; x <= glyphData.horizontalOffset + lineExtentRight; x++ )
+ {
+ if( ( x < 0 ) || ( x > bufferWidth - 1 ) )
+ {
+ // Do not write out of bounds.
+ break;
+ }
+
+ uint32_t* bitmapBuffer = reinterpret_cast< uint32_t* >( glyphData.bitmapBuffer.GetBuffer() );
+ uint32_t underlinePixel = *( bitmapBuffer + y * glyphData.width + x );
+ uint8_t* underlinePixelBuffer = reinterpret_cast<uint8_t*>( &underlinePixel );
+
+ // Write the underline color to the pixel buffer
+ *( underlinePixelBuffer ) = static_cast<uint8_t>( underlineColor.r * 255.f );
+ *( underlinePixelBuffer + 1u ) = static_cast<uint8_t>( underlineColor.g * 255.f );
+ *( underlinePixelBuffer + 2u ) = static_cast<uint8_t>( underlineColor.b * 255.f );
+ *( underlinePixelBuffer + 3u ) = static_cast<uint8_t>( underlineColor.a * 255.f );
+
+ *( bitmapBuffer + y * glyphData.width + x ) = underlinePixel;
+ }
}
}
glyphData.verticalOffset += static_cast<int>( -line.descender );
}
- return pixelData;
+ return glyphData.bitmapBuffer;
+}
+
+Devel::PixelBuffer Typesetter::CombineImageBuffer( Devel::PixelBuffer topPixelBuffer, Devel::PixelBuffer bottomPixelBuffer, const unsigned int bufferWidth, const unsigned int bufferHeight )
+{
+ unsigned char* topBuffer = topPixelBuffer.GetBuffer();
+ unsigned char* bottomBuffer = bottomPixelBuffer.GetBuffer();
+
+ Devel::PixelBuffer combinedPixelBuffer;
+
+ if ( topBuffer == NULL && bottomBuffer == NULL )
+ {
+ // Nothing to do if both buffers are empty.
+ return combinedPixelBuffer;
+ }
+
+ if ( topBuffer == NULL )
+ {
+ // Nothing to do if topBuffer is empty.
+ return bottomPixelBuffer;
+ }
+
+ if ( bottomBuffer == NULL )
+ {
+ // Nothing to do if bottomBuffer is empty.
+ return topPixelBuffer;
+ }
+
+ const unsigned int bufferSizeInt = bufferWidth * bufferHeight;
+ const unsigned int bufferSizeChar = 4u * bufferSizeInt;
+
+ combinedPixelBuffer = Devel::PixelBuffer::New( bufferWidth, bufferHeight, Pixel::RGBA8888 );
+ uint8_t* combinedBuffer = reinterpret_cast< uint8_t* >( combinedPixelBuffer.GetBuffer() );
+ memset( combinedBuffer, 0u, bufferSizeChar );
+
+ for (unsigned int pixelIndex = 0; pixelIndex < bufferSizeInt; pixelIndex++)
+ {
+ // If the alpha of the pixel in either buffer is not fully opaque, blend the two pixels.
+ // Otherwise, copy pixel from topBuffer to combinedBuffer.
+
+ unsigned int alphaBuffer1 = topBuffer[pixelIndex*4+3];
+ unsigned int alphaBuffer2 = bottomBuffer[pixelIndex*4+3];
+
+ if ( alphaBuffer1 != 255 || alphaBuffer2 != 255 )
+ {
+ // At least one pixel is not fully opaque
+ // "Over" blend the the pixel from topBuffer with the pixel in bottomBuffer
+ combinedBuffer[pixelIndex*4] = ( topBuffer[pixelIndex*4] * topBuffer[pixelIndex*4+3] / 255 ) + ( bottomBuffer[pixelIndex*4] * bottomBuffer[pixelIndex*4+3] * ( 255 - topBuffer[pixelIndex*4+3] ) / ( 255*255 ) );
+ combinedBuffer[pixelIndex*4+1] = ( topBuffer[pixelIndex*4+1] * topBuffer[pixelIndex*4+3] / 255 ) + ( bottomBuffer[pixelIndex*4+1] * bottomBuffer[pixelIndex*4+3] * ( 255 - topBuffer[pixelIndex*4+3] ) / ( 255*255 ) );
+ combinedBuffer[pixelIndex*4+2] = ( topBuffer[pixelIndex*4+2] * topBuffer[pixelIndex*4+3] / 255 ) + ( bottomBuffer[pixelIndex*4+2] * bottomBuffer[pixelIndex*4+3] * ( 255 - topBuffer[pixelIndex*4+3] ) / ( 255*255 ) );
+ combinedBuffer[pixelIndex*4+3] = topBuffer[pixelIndex*4+3] + ( bottomBuffer[pixelIndex*4+3] * ( 255 - topBuffer[pixelIndex*4+3] ) / 255 );
+ }
+ else
+ {
+ // Copy the pixel from topBuffer to combinedBuffer
+ combinedBuffer[pixelIndex*4] = topBuffer[pixelIndex*4];
+ combinedBuffer[pixelIndex*4+1] = topBuffer[pixelIndex*4+1];
+ combinedBuffer[pixelIndex*4+2] = topBuffer[pixelIndex*4+2];
+ combinedBuffer[pixelIndex*4+3] = topBuffer[pixelIndex*4+3];
+ }
+ }
+
+ return combinedPixelBuffer;
}
Typesetter::Typesetter( const ModelInterface* const model )
projects / platform / core / uifw / dali-toolkit.git / blobdiff