40 lines
1.5 KiB
Diff
40 lines
1.5 KiB
Diff
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From 2b930f694c2275b892772857002724b9fdcae6c5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
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Date: Thu, 16 Jul 2020 03:52:23 +0200
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Subject: [PATCH 1/2] Correct GL_BACK/GL_BACK_LEFT mapping on GLES
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GLES does not have LEFT/RIGHT targets for the default framebuffer, but
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just GL_BACK, so there is no need to remap it. Desktop GL may have
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LEFT and RIGHT attached at the simultaneously, so one of the buffers
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has to be selected when querying the attributes.
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---
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Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx b/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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index 9bbbc2ba54..4bda9330b6 100644
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--- a/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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+++ b/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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@@ -719,6 +719,10 @@ int vtkOpenGLRenderWindow::GetColorBufferSizes(int* rgba)
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#ifdef GL_DRAW_BUFFER
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glGetIntegerv(GL_DRAW_BUFFER, &attachment);
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#endif
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+#ifdef GL_ES_VERSION_3_0
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+ // GLES only has the GL_BACK color
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+ // attachment for the default framebuffer
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+#else
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// GL seems odd with its handling of left/right.
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// if it says we are using GL_FRONT or GL_BACK
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// then convert those to GL_FRONT_LEFT and
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@@ -731,6 +735,7 @@ int vtkOpenGLRenderWindow::GetColorBufferSizes(int* rgba)
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{
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attachment = GL_BACK_LEFT;
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}
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+#endif
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// make sure we clear any errors before we start
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// otherwise we may get incorrect results
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--
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2.27.0
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