forked from bartvdbraak/blender
110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
#include "FTPixmapGlyph.h"
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FTPixmapGlyph::FTPixmapGlyph( FT_GlyphSlot glyph)
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: FTGlyph( glyph),
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destWidth(0),
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destHeight(0),
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data(0)
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{
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err = FT_Render_Glyph( glyph, FT_RENDER_MODE_NORMAL);
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if( err || ft_glyph_format_bitmap != glyph->format)
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{
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return;
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}
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FT_Bitmap bitmap = glyph->bitmap;
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//check the pixel mode
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//ft_pixel_mode_grays
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int srcWidth = bitmap.width;
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int srcHeight = bitmap.rows;
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// FIXME What about dest alignment?
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destWidth = srcWidth;
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destHeight = srcHeight;
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if( destWidth && destHeight)
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{
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data = new unsigned char[destWidth * destHeight * 4];
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// Get the current glColor.
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float ftglColour[4];
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// glGetFloatv( GL_CURRENT_COLOR, ftglColour);
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ftglColour[0] = ftglColour[1] = ftglColour[2] = ftglColour[3] = 1.0;
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unsigned char redComponent = static_cast<unsigned char>( ftglColour[0] * 255.0f);
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unsigned char greenComponent = static_cast<unsigned char>( ftglColour[1] * 255.0f);
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unsigned char blueComponent = static_cast<unsigned char>( ftglColour[2] * 255.0f);
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unsigned char* src = bitmap.buffer;
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unsigned char* dest = data + ((destHeight - 1) * destWidth) * 4;
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size_t destStep = destWidth * 4 * 2;
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if( ftglColour[3] == 1.0f)
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{
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for( int y = 0; y < srcHeight; ++y)
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{
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for( int x = 0; x < srcWidth; ++x)
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{
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*dest++ = redComponent;
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*dest++ = greenComponent;
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*dest++ = blueComponent;
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*dest++ = *src++;
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}
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dest -= destStep;
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}
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}
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else
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{
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for( int y = 0; y < srcHeight; ++y)
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{
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for( int x = 0; x < srcWidth; ++x)
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{
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*dest++ = redComponent;
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*dest++ = greenComponent;
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*dest++ = blueComponent;
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*dest++ = static_cast<unsigned char>(ftglColour[3] * *src++);
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}
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dest -= destStep;
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}
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}
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destHeight = srcHeight;
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}
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pos.x = glyph->bitmap_left;
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pos.y = srcHeight - glyph->bitmap_top;
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}
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FTPixmapGlyph::~FTPixmapGlyph()
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{
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delete [] data;
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}
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#include <math.h>
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float FTPixmapGlyph::Render( const FTPoint& pen)
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{
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if( data)
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{
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float dx, dy;
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dx= floor( (pen.x + pos.x ) );
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dy= ( (pen.y - pos.y ) );
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// Move the glyph origin
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glBitmap( 0, 0, 0.0f, 0.0f, dx, dy, (const GLubyte*)0);
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glPixelStorei( GL_UNPACK_ROW_LENGTH, 0);
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glDrawPixels( destWidth, destHeight, GL_RGBA, GL_UNSIGNED_BYTE, (const GLvoid*)data);
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// Restore the glyph origin
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glBitmap( 0, 0, 0.0f, 0.0f, -dx, -dy, (const GLubyte*)0);
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}
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return advance;
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}
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