40 lines
1.4 KiB
Diff
40 lines
1.4 KiB
Diff
From 84756d94c73885803ad8044099ab47c0c49b5076 Mon Sep 17 00:00:00 2001
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From: Laszlo Agocs <laszlo.agocs@digia.com>
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Date: Thu, 23 Jan 2014 11:45:22 +0100
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Subject: [PATCH] eglfs: Fix quad coordinates
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Prevent artifacts on raster windows by properly mapping
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the coordinates to [-1,1].
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Upstream-Status: Backport
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Task-number: QTBUG-36370
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Change-Id: I95d0d03952f597ef4ce6a950c6533a3af2df964a
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Reviewed-by: Andy Nichols <andy.nichols@digia.com>
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Signed-off-by: Jonathan Liu <net147@gmail.com>
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---
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src/plugins/platforms/eglfs/qeglfscompositor.cpp | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/src/plugins/platforms/eglfs/qeglfscompositor.cpp b/src/plugins/platforms/eglfs/qeglfscompositor.cpp
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index 845bb5b..1efc4f7 100644
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--- a/src/plugins/platforms/eglfs/qeglfscompositor.cpp
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+++ b/src/plugins/platforms/eglfs/qeglfscompositor.cpp
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@@ -153,10 +153,11 @@ void QEglFSCompositor::render(QEglFSWindow *window, uint texture, bool raster)
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QPoint tl = r.topLeft();
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QPoint br = r.bottomRight();
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+ // Map to [-1,1]
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GLfloat x1 = (tl.x() / sr.width()) * 2 - 1;
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- GLfloat x2 = (br.x() / sr.width()) * 2 - 1;
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GLfloat y1 = ((sr.height() - tl.y()) / sr.height()) * 2 - 1;
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- GLfloat y2 = ((sr.height() - br.y()) / sr.height()) * 2 - 1;
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+ GLfloat x2 = ((br.x() + 1) / sr.width()) * 2 - 1;
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+ GLfloat y2 = ((sr.height() - (br.y() + 1)) / sr.height()) * 2 - 1;
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if (!raster)
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qSwap(y1, y2);
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--
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1.7.1
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