/*
- * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2020 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 <dali-toolkit/internal/text/rendering/text-typesetter.h>
// EXTERNAL INCLUDES
-#include <dali/devel-api/text-abstraction/font-client.h>
#include <memory.h>
+#include <dali/devel-api/text-abstraction/font-client.h>
+#include <dali/public-api/common/constants.h>
// INTERNAL INCLUDES
#include <dali-toolkit/internal/text/rendering/view-model.h>
+#include <dali-toolkit/devel-api/controls/text-controls/text-label-devel.h>
namespace Dali
{
*/
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.
+ * @param[in] pixelFormat The format of the pixel in the image that the text is rendered as (i.e. either Pixel::BGRA8888 or Pixel::L8).
*/
-void TypesetGlyph( const GlyphData& data,
+void TypesetGlyph( GlyphData& data,
const Vector2* const position,
- const Vector4* const color )
+ const Vector4* const color,
+ Typesetter::Style style,
+ Pixel::Format pixelFormat )
{
if( ( 0u == data.glyphBitmap.width ) || ( 0u == data.glyphBitmap.height ) )
{
const int widthMinusOne = static_cast<int>( data.width - 1u );
const int heightMinusOne = static_cast<int>( data.height - 1u );
- // Whether the given glyph is a color one.
- const bool isColorGlyph = Pixel::BGRA8888 == data.glyphBitmap.format;
+ if ( Pixel::RGBA8888 == pixelFormat )
+ {
+ // Whether the given glyph is a color one.
+ const bool isColorGlyph = data.glyphBitmap.isColorEmoji || data.glyphBitmap.isColorBitmap;
+ const uint32_t glyphPixelSize = Pixel::GetBytesPerPixel( data.glyphBitmap.format );
+ const uint32_t alphaIndex = glyphPixelSize - 1u;
+ const bool swapChannelsBR = Pixel::BGRA8888 == data.glyphBitmap.format;
+
+ // Pointer to the color glyph if there is one.
+ const uint32_t* const colorGlyphBuffer = isColorGlyph ? reinterpret_cast<uint32_t*>( data.glyphBitmap.buffer ) : NULL;
+
+ // Initial vertical offset.
+ const int yOffset = data.verticalOffset + position->y;
+
+ uint32_t* bitmapBuffer = reinterpret_cast< uint32_t* >( data.bitmapBuffer.GetBuffer() );
+
+ // Traverse the pixels of the glyph line per line.
+ for( int lineIndex = 0, glyphHeight = static_cast<int>( data.glyphBitmap.height ); lineIndex < glyphHeight; ++lineIndex )
+ {
+ const int yOffsetIndex = yOffset + lineIndex;
+ if( ( 0 > yOffsetIndex ) || ( yOffsetIndex > heightMinusOne ) )
+ {
+ // Do not write out of bounds.
+ continue;
+ }
+
+ const int verticalOffset = yOffsetIndex * data.width;
+ const int xOffset = data.horizontalOffset + position->x;
+ const int glyphBufferOffset = lineIndex * static_cast<int>( data.glyphBitmap.width );
+ for( int index = 0, glyphWidth = static_cast<int>( data.glyphBitmap.width ); index < glyphWidth; ++index )
+ {
+ const int xOffsetIndex = xOffset + index;
+ if( ( 0 > xOffsetIndex ) || ( xOffsetIndex > widthMinusOne ) )
+ {
+ // Don't write out of bounds.
+ continue;
+ }
+
+ if( isColorGlyph )
+ {
+ // Retrieves the color from the color glyph.
+ uint32_t packedColorGlyph = *( colorGlyphBuffer + glyphBufferOffset + index );
+ uint8_t* packedColorGlyphBuffer = reinterpret_cast<uint8_t*>( &packedColorGlyph );
+
+ // Update the alpha channel.
+ if( Typesetter::STYLE_MASK == style || Typesetter::STYLE_OUTLINE == style ) // Outline not shown for color glyph
+ {
+ // Create an alpha mask for color glyph.
+ *( packedColorGlyphBuffer + 3u ) = 0u;
+ *( packedColorGlyphBuffer + 2u ) = 0u;
+ *( packedColorGlyphBuffer + 1u ) = 0u;
+ *packedColorGlyphBuffer = 0u;
+ }
+ else
+ {
+ const uint8_t colorAlpha = static_cast<uint8_t>( color->a * static_cast<float>( *( packedColorGlyphBuffer + 3u ) ) );
+ *( packedColorGlyphBuffer + 3u ) = colorAlpha;
+
+ if( Typesetter::STYLE_SHADOW == style )
+ {
+ // The shadow of color glyph needs to have the shadow color.
+ *( packedColorGlyphBuffer + 2u ) = static_cast<uint8_t>( color->b * colorAlpha );
+ *( packedColorGlyphBuffer + 1u ) = static_cast<uint8_t>( color->g * colorAlpha );
+ *packedColorGlyphBuffer = static_cast<uint8_t>( color->r * colorAlpha );
+ }
+ else
+ {
+ if( swapChannelsBR )
+ {
+ std::swap( *packedColorGlyphBuffer, *( packedColorGlyphBuffer + 2u ) ); // Swap B and R.
+ }
+
+ *( packedColorGlyphBuffer + 2u ) = ( *( packedColorGlyphBuffer + 2u ) * colorAlpha / 255 );
+ *( packedColorGlyphBuffer + 1u ) = ( *( packedColorGlyphBuffer + 1u ) * colorAlpha / 255 );
+ *packedColorGlyphBuffer = ( *( packedColorGlyphBuffer ) * colorAlpha / 255 );
+
+ if( data.glyphBitmap.isColorBitmap )
+ {
+ *( packedColorGlyphBuffer + 2u ) = static_cast<uint8_t>( *( packedColorGlyphBuffer + 2u ) * color->b );
+ *( packedColorGlyphBuffer + 1u ) = static_cast<uint8_t>( *( packedColorGlyphBuffer + 1u ) * color->g );
+ *packedColorGlyphBuffer = static_cast<uint8_t>( *packedColorGlyphBuffer * color->r );
+ }
+ }
+ }
+
+ // Set the color into the final pixel buffer.
+ *( bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColorGlyph;
+ }
+ else
+ {
+ // Pack the given color into a 32bit buffer. The alpha channel will be updated later for each pixel.
+ // The format is RGBA8888.
+ uint32_t packedColor = 0u;
+ uint8_t* packedColorBuffer = reinterpret_cast<uint8_t*>( &packedColor );
+
+ // Update the alpha channel.
+ const uint8_t alpha = *( data.glyphBitmap.buffer + glyphPixelSize * ( glyphBufferOffset + index ) + alphaIndex );
+
+ // Copy non-transparent pixels only
+ if ( alpha > 0u )
+ {
+ // Check alpha of overlapped pixels
+ uint32_t& currentColor = *( bitmapBuffer + verticalOffset + xOffsetIndex );
+ uint8_t* packedCurrentColorBuffer = reinterpret_cast<uint8_t*>( ¤tColor );
+
+ // For any pixel overlapped with the pixel in previous glyphs, make sure we don't
+ // overwrite a previous bigger alpha with a smaller alpha (in order to avoid
+ // semi-transparent gaps between joint glyphs with overlapped pixels, which could
+ // happen, for example, in the RTL text when we copy glyphs from right to left).
+ uint8_t currentAlpha = *( packedCurrentColorBuffer + 3u );
+ currentAlpha = std::max( currentAlpha, alpha );
+
+ // Color is pre-muliplied with its alpha.
+ *( packedColorBuffer + 3u ) = static_cast<uint8_t>( color->a * currentAlpha );
+ *( packedColorBuffer + 2u ) = static_cast<uint8_t>( color->b * currentAlpha );
+ *( packedColorBuffer + 1u ) = static_cast<uint8_t>( color->g * currentAlpha );
+ *( packedColorBuffer ) = static_cast<uint8_t>( color->r * currentAlpha );
+
+ // Set the color into the final pixel buffer.
+ currentColor = packedColor;
+ }
+ }
+ }
+ }
+ }
+ else
+ {
+ // Whether the given glyph is a color one.
+ const bool isColorGlyph = data.glyphBitmap.isColorEmoji || data.glyphBitmap.isColorBitmap;
+ const uint32_t glyphPixelSize = Pixel::GetBytesPerPixel( data.glyphBitmap.format );
+ const uint32_t alphaIndex = glyphPixelSize - 1u;
+
+ // Initial vertical offset.
+ const int yOffset = data.verticalOffset + position->y;
+
+ uint8_t* bitmapBuffer = reinterpret_cast< uint8_t* >( data.bitmapBuffer.GetBuffer() );
+
+ // Traverse the pixels of the glyph line per line.
+ for( int lineIndex = 0, glyphHeight = static_cast<int>( data.glyphBitmap.height ); lineIndex < glyphHeight; ++lineIndex )
+ {
+ const int yOffsetIndex = yOffset + lineIndex;
+ if( ( 0 > yOffsetIndex ) || ( yOffsetIndex > heightMinusOne ) )
+ {
+ // Do not write out of bounds.
+ continue;
+ }
+
+ const int verticalOffset = yOffsetIndex * data.width;
+ const int xOffset = data.horizontalOffset + position->x;
+ const int glyphBufferOffset = lineIndex * static_cast<int>( data.glyphBitmap.width );
+ for( int index = 0, glyphWidth = static_cast<int>( data.glyphBitmap.width ); index < glyphWidth; ++index )
+ {
+ const int xOffsetIndex = xOffset + index;
+ if( ( 0 > xOffsetIndex ) || ( xOffsetIndex > widthMinusOne ) )
+ {
+ // Don't write out of bounds.
+ continue;
+ }
+
+ if ( !isColorGlyph )
+ {
+ // Update the alpha channel.
+ const uint8_t alpha = *( data.glyphBitmap.buffer + glyphPixelSize * ( glyphBufferOffset + index ) + alphaIndex );
+
+ // Copy non-transparent pixels only
+ if ( alpha > 0u )
+ {
+ // Check alpha of overlapped pixels
+ uint8_t& currentAlpha = *( bitmapBuffer + verticalOffset + xOffsetIndex );
+
+ // For any pixel overlapped with the pixel in previous glyphs, make sure we don't
+ // overwrite a previous bigger alpha with a smaller alpha (in order to avoid
+ // semi-transparent gaps between joint glyphs with overlapped pixels, which could
+ // happen, for example, in the RTL text when we copy glyphs from right to left).
+ currentAlpha = std::max( currentAlpha, alpha );
+ }
+ }
+ }
+ }
+ }
+}
- // Pointer to the color glyph if there is one.
- const uint32_t* const colorGlyphBuffer = isColorGlyph ? reinterpret_cast<uint32_t*>( data.glyphBitmap.buffer ) : NULL;
+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;
+}
+
+/// Helper method to fetch the underline metrics for the specified font glyph
+void FetchFontUnderlineMetrics(
+ TextAbstraction::FontClient& fontClient,
+ const GlyphInfo* const glyphInfo,
+ float& currentUnderlinePosition,
+ const float underlineHeight,
+ float& currentUnderlineThickness,
+ float& maxUnderlineThickness,
+ FontId& lastUnderlinedFontId)
+{
+ 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;
+}
- // Pack the given color into a 32bit buffer. The alpha channel will be updated later for each pixel.
- // The format is RGBA8888.
- uint32_t packedColor = 0u;
- uint8_t* packedColorBuffer = reinterpret_cast<uint8_t*>( &packedColor );
- *( packedColorBuffer + 2 ) = static_cast<uint8_t>( color->b * 255.f );
- *( packedColorBuffer + 1 ) = static_cast<uint8_t>( color->g * 255.f );
- *packedColorBuffer = static_cast<uint8_t>( color->r * 255.f );
+/// Draws the specified color to the pixel buffer
+void WriteColorToPixelBuffer(
+ GlyphData& glyphData,
+ uint32_t* bitmapBuffer,
+ const Vector4& color,
+ const unsigned int x,
+ const unsigned int y)
+{
+ // Always RGBA image for text with styles
+ uint32_t pixel = *( bitmapBuffer + y * glyphData.width + x );
+ uint8_t* pixelBuffer = reinterpret_cast<uint8_t*>( &pixel );
+
+ // Write the color to the pixel buffer
+ uint8_t colorAlpha = static_cast< uint8_t >( color.a * 255.f );
+ *( pixelBuffer + 3u ) = colorAlpha;
+ *( pixelBuffer + 2u ) = static_cast< uint8_t >( color.b * colorAlpha );
+ *( pixelBuffer + 1u ) = static_cast< uint8_t >( color.g * colorAlpha );
+ *( pixelBuffer ) = static_cast< uint8_t >( color.r * colorAlpha );
+
+ *( bitmapBuffer + y * glyphData.width + x ) = pixel;
+}
- // Initial vertical offset.
- const int yOffset = data.verticalOffset + position->y;
+/// Draws the specified underline color to the buffer
+void DrawUnderline(
+ const Vector4& underlineColor,
+ const unsigned int bufferWidth,
+ const unsigned int bufferHeight,
+ GlyphData& glyphData,
+ const float baseline,
+ const float currentUnderlinePosition,
+ const float maxUnderlineThickness,
+ const float lineExtentLeft,
+ const float lineExtentRight)
+{
+ int underlineYOffset = glyphData.verticalOffset + baseline + currentUnderlinePosition;
+ uint32_t* bitmapBuffer = reinterpret_cast< uint32_t* >( glyphData.bitmapBuffer.GetBuffer() );
- // Traverse the pixels of the glyph line per line.
- for( int lineIndex = 0, glyphHeight = static_cast<int>( data.glyphBitmap.height ); lineIndex < glyphHeight; ++lineIndex )
+ for( unsigned int y = underlineYOffset; y < underlineYOffset + maxUnderlineThickness; y++ )
{
- const int yOffsetIndex = yOffset + lineIndex;
- if( ( 0 > yOffsetIndex ) || ( yOffsetIndex > heightMinusOne ) )
+ if( y > bufferHeight - 1 )
{
// Do not write out of bounds.
break;
}
- const int verticalOffset = yOffsetIndex * data.width;
- const int xOffset = data.horizontalOffset + position->x;
- const int glyphBufferOffset = lineIndex * static_cast<int>( data.glyphBitmap.width );
- for( int index = 0, glyphWidth = static_cast<int>( data.glyphBitmap.width ); index < glyphWidth; ++index )
+ for( unsigned int x = glyphData.horizontalOffset + lineExtentLeft; x <= glyphData.horizontalOffset + lineExtentRight; x++ )
{
- const int xOffsetIndex = xOffset + index;
- if( ( 0 > xOffsetIndex ) || ( xOffsetIndex > widthMinusOne ) )
+ if( x > bufferWidth - 1 )
{
- // Don't write out of bounds.
+ // Do not write out of bounds.
break;
}
- if( isColorGlyph )
- {
- // Retrieves the color from the glyph. The format is BGRA8888.
- uint32_t packedColorGlyph = *( colorGlyphBuffer + glyphBufferOffset + index );
+ WriteColorToPixelBuffer(glyphData, bitmapBuffer, underlineColor, x, y);
+ }
+ }
+}
- // 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 ) ) );
+/// Draws the background color to the buffer
+void DrawBackgroundColor(
+ Vector4 backgroundColor,
+ const unsigned int bufferWidth,
+ const unsigned int bufferHeight,
+ GlyphData& glyphData,
+ const float baseline,
+ const LineRun& line,
+ const float lineExtentLeft,
+ const float lineExtentRight)
+{
+ uint32_t* bitmapBuffer = reinterpret_cast< uint32_t* >( glyphData.bitmapBuffer.GetBuffer() );
- // Set the color into the final pixel buffer.
- *( data.bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColorGlyph;
- }
- else
- {
- // Update the alpha channel.
- const uint8_t alpha = *( data.glyphBitmap.buffer + glyphBufferOffset + index );
- *( packedColorBuffer + 3u ) = static_cast<uint8_t>( color->a * static_cast<float>( alpha ) );
+ for( int y = glyphData.verticalOffset + baseline - line.ascender; y < glyphData.verticalOffset + baseline - line.descender; y++ )
+ {
+ if( ( y < 0 ) || ( y > static_cast<int>(bufferHeight - 1) ) )
+ {
+ // Do not write out of bounds.
+ continue;
+ }
- // Set the color into the final pixel buffer.
- *( data.bitmapBuffer + verticalOffset + xOffsetIndex ) = packedColor;
+ for( int x = glyphData.horizontalOffset + lineExtentLeft; x <= glyphData.horizontalOffset + lineExtentRight; x++ )
+ {
+ if( ( x < 0 ) || ( x > static_cast<int>(bufferWidth - 1) ) )
+ {
+ // Do not write out of bounds.
+ continue;
}
+
+ WriteColorToPixelBuffer(glyphData, bitmapBuffer, backgroundColor, x, y);
}
}
}
return mModel;
}
-PixelData Typesetter::Render( const Vector2& size )
+PixelData Typesetter::Render( const Vector2& size, Toolkit::DevelText::TextDirection::Type textDirection, RenderBehaviour behaviour, bool ignoreHorizontalAlignment, Pixel::Format pixelFormat )
{
// @todo. This initial implementation for a TextLabel has only one visible page.
// Retrieves the layout size.
const Size& layoutSize = mModel->GetLayoutSize();
+ const int outlineWidth = static_cast<int>( mModel->GetOutlineWidth() );
+
+ // Set the offset for the horizontal alignment according to the text direction and outline width.
+ int penX = 0;
+
+ switch( mModel->GetHorizontalAlignment() )
+ {
+ case HorizontalAlignment::BEGIN:
+ {
+ // No offset to add.
+ break;
+ }
+ case HorizontalAlignment::CENTER:
+ {
+ penX += ( textDirection == Toolkit::DevelText::TextDirection::LEFT_TO_RIGHT ) ? -outlineWidth : outlineWidth;
+ break;
+ }
+ case HorizontalAlignment::END:
+ {
+ penX += ( textDirection == Toolkit::DevelText::TextDirection::LEFT_TO_RIGHT ) ? -outlineWidth * 2 : outlineWidth * 2;
+ break;
+ }
+ }
+
// Set the offset for the vertical alignment.
int penY = 0u;
switch( mModel->GetVerticalAlignment() )
{
- case Layout::VERTICAL_ALIGN_TOP:
+ case VerticalAlignment::TOP:
{
// No offset to add.
break;
}
- case Layout::VERTICAL_ALIGN_CENTER:
+ case VerticalAlignment::CENTER:
{
penY = static_cast<int>( 0.5f * ( size.height - layoutSize.height ) );
+ penY = penY < 0.f ? 0.f : penY;
break;
}
- case Layout::VERTICAL_ALIGN_BOTTOM:
+ case VerticalAlignment::BOTTOM:
{
penY = static_cast<int>( size.height - layoutSize.height );
break;
}
}
+ // Calculate vertical line alignment
+ switch( mModel->GetVerticalLineAlignment() )
+ {
+ case DevelText::VerticalLineAlignment::TOP:
+ {
+ break;
+ }
+ case DevelText::VerticalLineAlignment::MIDDLE:
+ {
+ const auto& line = *mModel->GetLines();
+ penY -= line.descender;
+ penY += static_cast<int>(line.lineSpacing*0.5f + line.descender);
+ break;
+ }
+ case DevelText::VerticalLineAlignment::BOTTOM:
+ {
+ const auto& line = *mModel->GetLines();
+ const auto lineHeight = line.ascender + (-line.descender) + line.lineSpacing;
+ penY += static_cast<int>(lineHeight - (line.ascender - line.descender));
+ break;
+ }
+ }
+
+ // 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, pixelFormat, penX, 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, pixelFormat, penX, penY, 0u, numberOfGlyphs -1 );
+ }
+
+ if ( ( RENDER_NO_STYLES != behaviour ) && ( RENDER_MASK != behaviour ) )
+ {
+
+ // Generate the outline if enabled
+ const uint16_t outlineWidth = mModel->GetOutlineWidth();
+ if ( outlineWidth != 0u )
+ {
+ // Create the image buffer for outline
+ Devel::PixelBuffer outlineImageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_OUTLINE, ignoreHorizontalAlignment, pixelFormat, penX, penY, 0u, numberOfGlyphs -1 );
+
+ // Combine the two buffers
+ imageBuffer = CombineImageBuffer( imageBuffer, outlineImageBuffer, bufferWidth, bufferHeight );
+ }
+
+ // @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, pixelFormat, penX, penY, 0u, numberOfGlyphs - 1 );
+
+ // Check whether it will be a soft shadow
+ const float& blurRadius = mModel->GetShadowBlurRadius();
+
+ if ( blurRadius > Math::MACHINE_EPSILON_1 )
+ {
+ shadowImageBuffer.ApplyGaussianBlur( blurRadius );
+ }
+
+ // 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, pixelFormat, penX, penY, 0u, numberOfGlyphs - 1 );
+
+ // Combine the two buffers
+ imageBuffer = CombineImageBuffer( imageBuffer, underlineImageBuffer, bufferWidth, bufferHeight );
+ }
+
+ // Generate the background if enabled
+ const bool backgroundEnabled = mModel->IsBackgroundEnabled();
+ if ( backgroundEnabled )
+ {
+ Devel::PixelBuffer backgroundImageBuffer = CreateImageBuffer( bufferWidth, bufferHeight, Typesetter::STYLE_BACKGROUND, ignoreHorizontalAlignment, pixelFormat, penX, penY, 0u, numberOfGlyphs -1 );
+
+ // Combine the two buffers
+ imageBuffer = CombineImageBuffer( imageBuffer, backgroundImageBuffer, 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, Pixel::Format pixelFormat, int horizontalOffset, 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 = bufferWidth;
+ glyphData.height = bufferHeight;
+ glyphData.bitmapBuffer = Devel::PixelBuffer::New( bufferWidth, bufferHeight, pixelFormat );
+ glyphData.horizontalOffset = 0;
- glyphData.width = static_cast<unsigned int>( size.width );
- glyphData.height = static_cast<unsigned int>( size.height );
- const unsigned int bufferSizeInt = glyphData.width * glyphData.height;
- 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 );
+ if ( Pixel::RGBA8888 == pixelFormat )
+ {
+ const unsigned int bufferSizeInt = bufferWidth * bufferHeight;
+ const unsigned int bufferSizeChar = 4u * bufferSizeInt;
+ memset( glyphData.bitmapBuffer.GetBuffer(), 0u, bufferSizeChar );
+ }
+ else
+ {
+ memset( glyphData.bitmapBuffer.GetBuffer(), 0, bufferWidth * bufferHeight );
+ }
// 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 );
+ glyphData.horizontalOffset += horizontalOffset;
// Increases the vertical offset with the line's ascender.
glyphData.verticalOffset += static_cast<int>( line.ascender );
+ // Include line spacing after first line
+ if( lineIndex > 0u )
+ {
+ glyphData.verticalOffset += static_cast<int>( line.lineSpacing );
+ }
+
+ // Retrieves the glyph's outline width
+ float outlineWidth = static_cast<float>( mModel->GetOutlineWidth() );
+
+ if( style == Typesetter::STYLE_OUTLINE )
+ {
+ glyphData.horizontalOffset -= outlineWidth;
+ if( lineIndex == 0u )
+ {
+ // Only need to add the vertical outline offset for the first line
+ glyphData.verticalOffset -= outlineWidth;
+ }
+ }
+ else if ( style == Typesetter::STYLE_SHADOW )
+ {
+ const Vector2& shadowOffset = mModel->GetShadowOffset();
+ glyphData.horizontalOffset += shadowOffset.x - outlineWidth; // if outline enabled then shadow should offset from outline
+
+ if ( lineIndex == 0u )
+ {
+ // Only need to add the vertical shadow offset for first line
+ glyphData.verticalOffset += shadowOffset.y - outlineWidth;
+ }
+ }
+
+ 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
+ FetchFontUnderlineMetrics(fontClient, glyphInfo, currentUnderlinePosition, underlineHeight, currentUnderlineThickness, maxUnderlineThickness, lastUnderlinedFontId);
+ } // 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 ColorIndex colorIndex = useDefaultColor ? 0u : *( colorIndexBuffer + glyphIndex );
+
+ Vector4 color;
+ if ( style == Typesetter::STYLE_SHADOW )
+ {
+ color = mModel->GetShadowColor();
+ }
+ else if ( style == Typesetter::STYLE_OUTLINE )
+ {
+ color = mModel->GetOutlineColor();
+ }
+ else
+ {
+ color = ( useDefaultColor || ( 0u == colorIndex ) ) ? defaultColor : *( colorsBuffer + ( colorIndex - 1u ) );
+ }
+
+ // Premultiply alpha
+ color.r *= color.a;
+ color.g *= color.a;
+ color.b *= color.a;
// 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 );
+
+ if( style != Typesetter::STYLE_OUTLINE && style != Typesetter::STYLE_SHADOW )
+ {
+ // Don't render outline for other styles
+ outlineWidth = 0.0f;
+ }
+
+ if( style != Typesetter::STYLE_UNDERLINE )
+ {
+ fontClient.CreateBitmap( glyphInfo->fontId,
+ glyphInfo->index,
+ glyphInfo->isItalicRequired,
+ glyphInfo->isBoldRequired,
+ glyphData.glyphBitmap,
+ static_cast<int>( outlineWidth ) );
+ }
// Sets the glyph's bitmap into the bitmap of the whole text.
if( NULL != glyphData.glyphBitmap.buffer )
{
+ if ( style == Typesetter::STYLE_OUTLINE )
+ {
+ // Set the position offset for the current glyph
+ glyphData.horizontalOffset -= glyphData.glyphBitmap.outlineOffsetX;
+ glyphData.verticalOffset -= glyphData.glyphBitmap.outlineOffsetY;
+ }
+
+ // Set the buffer of the glyph's bitmap into the final bitmap's buffer
TypesetGlyph( glyphData,
position,
- color );
+ &color,
+ style,
+ pixelFormat);
+
+ if ( style == Typesetter::STYLE_OUTLINE )
+ {
+ // Reset the position offset for the next glyph
+ glyphData.horizontalOffset += glyphData.glyphBitmap.outlineOffsetX;
+ glyphData.verticalOffset += glyphData.glyphBitmap.outlineOffsetY;
+ }
+
+ // 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 )
+ {
+ DrawUnderline(underlineColor, bufferWidth, bufferHeight, glyphData, baseline, currentUnderlinePosition, maxUnderlineThickness, lineExtentLeft, lineExtentRight);
+ }
+
+ // Draw the background color from the leftmost glyph to the rightmost glyph
+ if ( style == Typesetter::STYLE_BACKGROUND )
+ {
+ DrawBackgroundColor(mModel->GetBackgroundColor(), bufferWidth, bufferHeight, glyphData, baseline, line, lineExtentLeft, lineExtentRight);
+ }
+
// Increases the vertical offset with the line's descender.
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;
+ }
+
+ // Always combine two RGBA images
+ 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];
+
+ if ( alphaBuffer1 != 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] + ( bottomBuffer[pixelIndex*4] * ( 255 - topBuffer[pixelIndex*4+3] ) / 255 );
+ combinedBuffer[pixelIndex*4+1] = topBuffer[pixelIndex*4+1] + ( bottomBuffer[pixelIndex*4+1] * ( 255 - topBuffer[pixelIndex*4+3] ) / 255 );
+ combinedBuffer[pixelIndex*4+2] = topBuffer[pixelIndex*4+2] + ( bottomBuffer[pixelIndex*4+2] * ( 255 - topBuffer[pixelIndex*4+3] ) / 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