From 84756d94c73885803ad8044099ab47c0c49b5076 Mon Sep 17 00:00:00 2001 From: Laszlo Agocs Date: Thu, 23 Jan 2014 11:45:22 +0100 Subject: [PATCH] eglfs: Fix quad coordinates Prevent artifacts on raster windows by properly mapping the coordinates to [-1,1]. Task-number: QTBUG-36370 Change-Id: I95d0d03952f597ef4ce6a950c6533a3af2df964a Reviewed-by: Andy Nichols --- src/platformsupport/eglconvenience/qeglcompositor.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/platformsupport/eglconvenience/qeglcompositor.cpp b/src/platformsupport/eglconvenience/qeglcompositor.cpp index c8b768ae48..f81d72c4bd 100644 --- a/src/platformsupport/eglconvenience/qeglcompositor.cpp +++ b/src/platformsupport/eglconvenience/qeglcompositor.cpp @@ -144,10 +144,11 @@ void QEGLCompositor::render(QEGLPlatformWindow *window, uint texture, bool raste QPoint tl = r.topLeft(); QPoint br = r.bottomRight(); + // Map to [-1,1] GLfloat x1 = (tl.x() / sr.width()) * 2 - 1; - GLfloat x2 = (br.x() / sr.width()) * 2 - 1; GLfloat y1 = ((sr.height() - tl.y()) / sr.height()) * 2 - 1; - GLfloat y2 = ((sr.height() - br.y()) / sr.height()) * 2 - 1; + GLfloat x2 = ((br.x() + 1) / sr.width()) * 2 - 1; + GLfloat y2 = ((sr.height() - (br.y() + 1)) / sr.height()) * 2 - 1; if (!raster) qSwap(y1, y2);