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Recent changes in Qt's EGL layer required some changes in the code used
to convert RSgImage to/from VGImage.
Reviewed-by: Gunnar Sletta
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Needed in order to subclass and override in the Symbian specific
implementation.
Reviewed-by: Rhys Weatherley
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The OpenVG paint engine traditionally takes glyph images from the
alphaMapForGlyph() function which returns the glyph image in the
upright projection. When it constructs a VGImage from this image, it
passes a positive data stride which will read the top scanline of the
source image into the bottom scanline of the VGImage due to the VG
coordinate system. It then uses the path transform where the 'sy' value
of the matrix is set to -1 and this re-inverts everything when drawing.
With the Symbian based glyph cache, the VGImage is constructed from a
RSgImage which is a hardware resource and compensates for the
coordinate system used by VG and GL at the time it is created. In
the case of the hardware glyph cache, the glyph image is read into the
RSgImage using a negative data stride so it does not need to be
inverted when drawn. To allow for this, introduce a flag which
indicates that the 'sy' entry of the matrix should be flipped such that
the glyph is drawn normally.
Also in this patch is a change to the glyph origin which now uses the
bottom of the glyph metric bounding rect instead of the top due to
orientation of the glyph inside the VGImage.
Reviewed-by: Alessandro Portale
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This introduces a specialized OpenVG font cache for the Symbian
platform. By using RGlyphDataIterator we can create a VGImage to store
inside a VGFont without having to upload our own glyph image. This
works by utilizing RSgImage which can be used to share handles to
graphics memory across processes thus allowing glyph images to be
shared by multiple processes and reducing graphics memory usage.
Reviewed-by: Alessandro Portale
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Factor out the Symbian specific bits of QVGPixmapData into a separate
file and introduce our subclassed implementation of the VG font cache.
Also make our font cache a friend of the S60 font engine because the
cache needs to access the CFont member to create the glyph image.
Reviewed-by: Alessandro Portale
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Needed in order to subclass and override in the Symbian specific
implementation.
Reviewed-by: Rhys Weatherley
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