93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#include "FTPixmapGlyph.h"
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#include "FTGL.h"
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FTPixmapGlyph::FTPixmapGlyph( FT_Glyph glyph)
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: FTGlyph(),
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destWidth(0),
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destHeight(0),
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numGreys(0),
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data(0)
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{
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// This function will always fail if the glyph's format isn't scalable????
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FT_Error err = FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1);
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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_BitmapGlyph bitmap = (FT_BitmapGlyph)glyph;
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FT_Bitmap* source = &bitmap->bitmap;
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//check the pixel mode
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//ft_pixel_mode_grays
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int srcWidth = source->width;
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int srcHeight = source->rows;
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int srcPitch = source->pitch;
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numGreys = source->num_grays;
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advance = glyph->advance.x >> 16;
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pos.x = bitmap->left;
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pos.y = srcHeight - bitmap->top;
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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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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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for(int y = 0; y < srcHeight; ++y)
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{
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--destHeight;
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for(int x = 0; x < srcWidth; ++x)
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{
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*( data + ( destHeight * destWidth + x) * 4 + 0) = static_cast<unsigned char>( ftglColour[0] * 255.0f);
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*( data + ( destHeight * destWidth + x) * 4 + 1) = static_cast<unsigned char>( ftglColour[1] * 255.0f);
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*( data + ( destHeight * destWidth + x) * 4 + 2) = static_cast<unsigned char>( ftglColour[2] * 255.0f);
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*( data + ( destHeight * destWidth + x) * 4 + 3) = static_cast<unsigned char>( ftglColour[3] * (*( source->buffer + ( y * srcPitch) + x)));
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}
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}
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destHeight = srcHeight;
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// discard glyph image (bitmap or not)
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// Is this the right place to do this?
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FT_Done_Glyph( glyph );
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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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float FTPixmapGlyph::Render( const FT_Vector& pen)
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{
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if( data != 0 )
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{
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glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT);
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// Move the glyph origin
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glBitmap( 0, 0, 0.0, 0.0, pen.x + pos.x, pen.y - pos.y, (const GLubyte *)0);
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glPixelStorei( GL_UNPACK_ROW_LENGTH, destWidth);
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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, 0.0, 0.0, -pen.x - pos.x, -pen.y + pos.y, (const GLubyte *)0);
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glPopClientAttrib();
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}
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return advance;
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}
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