Make QPF's implementation of alphaMapForGlyph() consistent.

The QPF implementation of alphaMapForGlyph() was returning
color values of RGBA = (a, a, a, 255) instead of (0, 0, 0, a),
which was inconsistent with all the other font engines.

This inconsistency caused some QPF-specific workarounds in the
OpenGL and OpenVG paint engines.  This change removes the workarounds
and makes QPF generate the right colors from the start.  Paint
engines that ignore the color table or which don't use the
alphaMapForGlyph() function (e.g. raster) are not affected.

Reviewed-by: Paul

1 files changed, 0 insertions, 14 deletions

diff --git a/src/openvg/qpaintengine_vg.cpp b/src/openvg/qpaintengine_vg.cpp
index 3558c28..b129164 100644
--- a/src/openvg/qpaintengine_vg.cpp
+++ b/src/openvg/qpaintengine_vg.cpp
@@ -3023,20 +3023,6 @@ void QVGFontGlyphCache::cacheGlyphs
         VGImage vgImage = VG_INVALID_HANDLE;
         metrics = ti.fontEngine->boundingBox(glyph);
         if (!scaledImage.isNull()) {  // Not a space character
-            // The QPF implementation of alphaMapForGlyph() uses the color
-            // RGBA = (value, value, value, 255) instead of the color
-            // RGBA = (0, 0, 0, value) that the other font engines use.
-            // We modify the image colors to rectify this situation.
-            QFontEngine::Type type = ti.fontEngine->type();
-            if (type == QFontEngine::QPF1 || type == QFontEngine::QPF2) {
-                if (scaledImage.format() == QImage::Format_Indexed8) {
-                    for (int i = 0; i < 256; ++i)
-                        scaledImage.setColor(i, qRgba(0, 0, 0, i));
-                } else if (scaledImage.format() == QImage::Format_Mono) {
-                    scaledImage.setColor(0, qRgba(0, 0, 0, 0));
-                    scaledImage.setColor(1, qRgba(0, 0, 0, 255));
-                }
-            }
             if (scaledImage.format() == QImage::Format_Indexed8) {
                 vgImage = vgCreateImage(VG_A_8, scaledImage.width(), scaledImage.height(), VG_IMAGE_QUALITY_FASTER);
                 vgImageSubData(vgImage, scaledImage.bits(), scaledImage.bytesPerLine(), VG_A_8, 0, 0, scaledImage.width(), scaledImage.height());