Fix text drawing into alpha pixmap with opengl engine

The merge 03dc74984749adf5b11482bf871a47086217845c mistakenly merged
the glyphMargin() (which had been removed in 4.7 because
QGLTextureGlyphCache now inherits from the image glyph cache) with the
glyphPadding() which had been introduced in separate commits in both
branches (probably backported.) This broke text drawing into a pixmap
with an alpha with the GL engine, because we'd assume a margin of 1,
but the alphaMapForGlyph() function doesn't support margins.

Task-number: QTBUG-11987
Reviewed-by: Gunnar

2 files changed, 0 insertions, 6 deletions

diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
index 5371c5e..410cf21 100644
--- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
@@ -276,11 +276,6 @@ void QGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph)
     }
 }
 
-int QGLTextureGlyphCache::glyphMargin() const
-{
-    return 1;
-}
-
 int QGLTextureGlyphCache::glyphPadding() const
 {
     return 1;
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
index 84e9021..6bcd655 100644
--- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
@@ -72,7 +72,6 @@ public:
     virtual void createTextureData(int width, int height);
     virtual void resizeTextureData(int width, int height);
     virtual void fillTexture(const Coord &c, glyph_t glyph);
-    virtual int glyphMargin() const;
     virtual int glyphPadding() const;
 
     inline GLuint texture() const { return m_texture; }