From 532115bcaa370af827a5cbad017b272842c5aacf Mon Sep 17 00:00:00 2001 From: Eskil Abrahamsen Blomfeldt Date: Tue, 7 Dec 2010 13:02:48 +0100 Subject: Fix text disappearing on GL when RGB-path is taken (no transformation) When there is no transformation on a glyph in the GL texture glyph cache, it will take the RGB code path to support subpixel antialiasing. In this code path we would ask glTextImage2D() to convert from a GL_ALPHA buffer to an internal format of GL_RGBA. This is not supported on OpenGL ES 2, and would cause missing text for some drivers. The change also fixes a typo in an #ifdef. Task-number: QTBUG-15789 Reviewed-by: Kim --- src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp index 705ad09..66445cd 100644 --- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp +++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp @@ -128,14 +128,17 @@ void QGLTextureGlyphCache::createTextureData(int width, int height) m_width = width; m_height = height; - QVarLengthArray data(width * height); - for (int i = 0; i < data.size(); ++i) - data[i] = 0; - - if (m_type == QFontEngineGlyphCache::Raster_RGBMask) - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, &data[0]); - else + if (m_type == QFontEngineGlyphCache::Raster_RGBMask) { + QVarLengthArray data(width * height * 4); + for (int i = 0; i < data.size(); ++i) + data[i] = 0; + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]); + } else { + QVarLengthArray data(width * height); + for (int i = 0; i < data.size(); ++i) + data[i] = 0; glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, &data[0]); + } glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); @@ -287,7 +290,7 @@ void QGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph) if (mask.format() == QImage::Format_RGB32) { glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_BGRA, GL_UNSIGNED_BYTE, mask.bits()); } else { -#ifdef QT_OPENGL_ES2 +#ifdef QT_OPENGL_ES_2 glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_ALPHA, GL_UNSIGNED_BYTE, mask.bits()); #else // glTexSubImage2D() might cause some garbage to appear in the texture if the mask width is -- cgit v0.12