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Viewing changes to extern/bFTGL/src/FTTextureGlyph.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Florian Ernst
  • Date: 2005-11-06 12:40:03 UTC
  • mfrom: (1.1.2 upstream)
  • Revision ID: james.westby@ubuntu.com-20051106124003-3pgs7tcg5rox96xg
Tags: 2.37a-1.1
http://bugs.debian.org/333958
* Non-maintainer upload.
* Split out parts of 01_SConstruct_debian.dpatch again: root_build_dir
  really needs to get adjusted before the clean target runs - closes: #333958,
  see #288882 for reference

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extern/bFTGL/src/FTTextureGlyph.cpp
 
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#include    "FTTextureGlyph.h"
 
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FTTextureGlyph::FTTextureGlyph( FT_GlyphSlot glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height)
 
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:   FTGlyph( glyph),
 
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    destWidth(0),
 
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    destHeight(0),
 
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    glTextureID(id),
 
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    activeTextureID(0)
 
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{
 
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    err = FT_Render_Glyph( glyph, FT_RENDER_MODE_NORMAL);
 
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    if( err || glyph->format != ft_glyph_format_bitmap)
 
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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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    destWidth  = bitmap.width;
 
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    destHeight = bitmap.rows;
 
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    if( destWidth && destHeight)
 
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    {
 
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        glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT);
 
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        glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE);
 
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        glPixelStorei( GL_UNPACK_ROW_LENGTH, 0);
 
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        glPixelStorei( GL_UNPACK_ALIGNMENT, 1);
 
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        glBindTexture( GL_TEXTURE_2D, glTextureID);
 
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        glTexSubImage2D( GL_TEXTURE_2D, 0, xOffset, yOffset, destWidth, destHeight, GL_ALPHA, GL_UNSIGNED_BYTE, bitmap.buffer);
 
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        glPopClientAttrib();
 
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    }
 
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//      0    
 
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//      +----+
 
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//      |    |
 
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//      |    |
 
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//      |    |
 
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//      +----+
 
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//           1
 
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    uv[0].x = static_cast<float>(xOffset) / static_cast<float>(width);
 
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    uv[0].y = static_cast<float>(yOffset) / static_cast<float>(height);
 
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    uv[1].x = static_cast<float>( xOffset + destWidth) / static_cast<float>(width);
 
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    uv[1].y = static_cast<float>( yOffset + destHeight) / static_cast<float>(height);
 
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    pos.x = glyph->bitmap_left;
 
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    pos.y = glyph->bitmap_top;
 
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}
 
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FTTextureGlyph::~FTTextureGlyph()
 
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{}
 
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#include <math.h>
 
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float FTTextureGlyph::Render( const FTPoint& pen)
 
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{
 
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        float dx;
 
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    glGetIntegerv( GL_TEXTURE_2D_BINDING_EXT, &activeTextureID);
 
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    if( activeTextureID != glTextureID)
 
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    {
 
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        glBindTexture( GL_TEXTURE_2D, (GLuint)glTextureID);
 
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    }
 
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        dx= floor( (pen.x + pos.x ) );
 
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    glBegin( GL_QUADS);
 
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        glTexCoord2f( uv[0].x, uv[0].y);
 
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        glVertex2f( dx,             pen.y + pos.y);
 
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        glTexCoord2f( uv[0].x, uv[1].y);
 
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        glVertex2f( dx,             pen.y + pos.y - destHeight);
 
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        glTexCoord2f( uv[1].x, uv[1].y);
 
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        glVertex2f( dx + destWidth, pen.y + pos.y - destHeight);
 
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        glTexCoord2f( uv[1].x, uv[0].y);
 
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        glVertex2f( dx + destWidth, pen.y + pos.y);
 
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    glEnd();
 
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    return advance;
 
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}
 
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