151 lines
6.8 KiB
Diff
151 lines
6.8 KiB
Diff
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From 651b3bae914b9f3c69031c97a366e5cf53ead389 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 19:54:38 +0200
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Subject: [PATCH 2/2] Use GL_DRAW_BUFFER0 instead of GL_DRAW_BUFFER for GLES
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compatibility
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ARB_draw_buffers is part of GL 2.0, so GL_DRAW_BUFFERS0 so it is always
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available, and contrary to GL_DRAW_BUFFER it is also valid for GLES
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(part of GLES 3 or as EXT_draw_buffers).
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This also matches the universal use of glDrawBuffers instead of
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glDrawBuffer.
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At least with MESA, GL_DRAW_BUFFER and GL_DRAW_BUFFER0 always return the
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same value. GL_DRAW_BUFFERn is also used in several places already.
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---
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.../ContextOpenGL2/vtkOpenGLContextBufferId.cxx | 2 +-
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.../vtkOpenGLContextDevice2DPrivate.h | 2 +-
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.../External/vtkExternalOpenGLRenderWindow.cxx | 2 +-
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Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx | 12 ++++++------
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Rendering/OpenGL2/vtkOpenGLState.cxx | 16 ++++++++--------
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5 files changed, 17 insertions(+), 17 deletions(-)
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diff --git a/Rendering/ContextOpenGL2/vtkOpenGLContextBufferId.cxx b/Rendering/ContextOpenGL2/vtkOpenGLContextBufferId.cxx
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index 06abb5e7e6..0d39638869 100644
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--- a/Rendering/ContextOpenGL2/vtkOpenGLContextBufferId.cxx
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+++ b/Rendering/ContextOpenGL2/vtkOpenGLContextBufferId.cxx
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@@ -139,7 +139,7 @@ vtkIdType vtkOpenGLContextBufferId::GetPickedItem(int x, int y)
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// Render texture to current write buffer. Texel x,y is rendered at
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// pixel x,y (instead of pixel 0,0 to work around pixel ownership test).
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GLint savedDrawBuffer;
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- glGetIntegerv(GL_DRAW_BUFFER, &savedDrawBuffer);
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+ glGetIntegerv(GL_DRAW_BUFFER0, &savedDrawBuffer);
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vtkOpenGLState::ScopedglEnableDisable dsaver(ostate, GL_DEPTH_TEST);
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vtkOpenGLState::ScopedglEnableDisable ssaver(ostate, GL_STENCIL_TEST);
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diff --git a/Rendering/ContextOpenGL2/vtkOpenGLContextDevice2DPrivate.h b/Rendering/ContextOpenGL2/vtkOpenGLContextDevice2DPrivate.h
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index 5632547459..17e2f182ef 100644
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--- a/Rendering/ContextOpenGL2/vtkOpenGLContextDevice2DPrivate.h
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+++ b/Rendering/ContextOpenGL2/vtkOpenGLContextDevice2DPrivate.h
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@@ -309,7 +309,7 @@ public:
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this->SavedStencilTest = ostate->GetEnumState(GL_STENCIL_TEST);
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this->SavedBlend = ostate->GetEnumState(GL_BLEND);
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ostate->vtkglGetFloatv(GL_COLOR_CLEAR_VALUE, this->SavedClearColor);
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- ostate->vtkglGetIntegerv(GL_DRAW_BUFFER, &this->SavedDrawBuffer);
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+ ostate->vtkglGetIntegerv(GL_DRAW_BUFFER0, &this->SavedDrawBuffer);
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}
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}
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diff --git a/Rendering/External/vtkExternalOpenGLRenderWindow.cxx b/Rendering/External/vtkExternalOpenGLRenderWindow.cxx
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index c95b50ac64..291c4e1e61 100644
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--- a/Rendering/External/vtkExternalOpenGLRenderWindow.cxx
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+++ b/Rendering/External/vtkExternalOpenGLRenderWindow.cxx
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@@ -60,7 +60,7 @@ void vtkExternalOpenGLRenderWindow::Start(void)
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// For stereo, render the correct eye based on the OpenGL buffer mode
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GLint bufferType;
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- ostate->vtkglGetIntegerv(GL_DRAW_BUFFER, &bufferType);
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+ ostate->vtkglGetIntegerv(GL_DRAW_BUFFER0, &bufferType);
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vtkCollectionSimpleIterator sit;
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vtkRenderer* renderer;
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for (this->GetRenderers()->InitTraversal(sit);
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diff --git a/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx b/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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index 4bda9330b6..14cd43711f 100644
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--- a/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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+++ b/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx
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@@ -533,8 +533,8 @@ bool vtkOpenGLRenderWindow::InitializeFromCurrentContext()
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{
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this->DefaultFrameBufferId = frameBufferBinding;
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GLint attachment = GL_COLOR_ATTACHMENT0;
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-#ifdef GL_DRAW_BUFFER
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- glGetIntegerv(GL_DRAW_BUFFER, &attachment);
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+#ifdef GL_DRAW_BUFFER0
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+ glGetIntegerv(GL_DRAW_BUFFER0, &attachment);
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#endif
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this->BackLeftBuffer = static_cast<unsigned int>(attachment);
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this->FrontLeftBuffer = static_cast<unsigned int>(attachment);
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@@ -660,8 +660,8 @@ bool vtkOpenGLRenderWindow::GetUsingSRGBColorSpace()
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this->MakeCurrent();
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GLint attachment = GL_BACK_LEFT;
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-#ifdef GL_DRAW_BUFFER
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- glGetIntegerv(GL_DRAW_BUFFER, &attachment);
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+#ifdef GL_DRAW_BUFFER0
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+ glGetIntegerv(GL_DRAW_BUFFER0, &attachment);
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#endif
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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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@@ -716,8 +716,8 @@ int vtkOpenGLRenderWindow::GetColorBufferSizes(int* rgba)
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{
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this->MakeCurrent();
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GLint attachment = GL_BACK_LEFT;
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-#ifdef GL_DRAW_BUFFER
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- glGetIntegerv(GL_DRAW_BUFFER, &attachment);
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+#ifdef GL_DRAW_BUFFER0
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+ glGetIntegerv(GL_DRAW_BUFFER0, &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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diff --git a/Rendering/OpenGL2/vtkOpenGLState.cxx b/Rendering/OpenGL2/vtkOpenGLState.cxx
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index 3822fe7bd0..dbec8329dd 100644
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--- a/Rendering/OpenGL2/vtkOpenGLState.cxx
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+++ b/Rendering/OpenGL2/vtkOpenGLState.cxx
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@@ -205,8 +205,8 @@ void vtkOpenGLState::CheckState()
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error = true;
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}
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unsigned int sval;
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-#ifdef GL_DRAW_BUFFER
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- ::glGetIntegerv(GL_DRAW_BUFFER, iparams);
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+#ifdef GL_DRAW_BUFFER0
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+ ::glGetIntegerv(GL_DRAW_BUFFER0, iparams);
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sval = this->CurrentState.DrawBinding.GetDrawBuffer(0);
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if (sval == GL_BACK_LEFT)
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{
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@@ -518,8 +518,8 @@ void vtkOpenGLState::vtkglBindFramebuffer(unsigned int target, unsigned int val)
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this->CurrentState.DrawBinding.Binding = val;
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this->CurrentState.DrawBinding.Framebuffer = nullptr;
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::glBindFramebuffer(GL_DRAW_FRAMEBUFFER, val);
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-#ifdef GL_DRAW_BUFFER
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- ::glGetIntegerv(GL_DRAW_BUFFER, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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+#ifdef GL_DRAW_BUFFER0
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+ ::glGetIntegerv(GL_DRAW_BUFFER0, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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#endif
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}
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}
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@@ -1222,8 +1222,8 @@ void vtkOpenGLState::Initialize(vtkOpenGLRenderWindow*)
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unsigned int vals[1];
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vals[0] = this->CurrentState.DrawBinding.GetDrawBuffer(0);
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::glDrawBuffers(1, vals);
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-#ifdef GL_DRAW_BUFFER
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- ::glGetIntegerv(GL_DRAW_BUFFER, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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+#ifdef GL_DRAW_BUFFER0
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+ ::glGetIntegerv(GL_DRAW_BUFFER0, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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#endif
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::glReadBuffer(this->CurrentState.ReadBinding.GetReadBuffer());
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::glGetIntegerv(GL_READ_BUFFER, (int*)&this->CurrentState.ReadBinding.ReadBuffer);
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@@ -1232,8 +1232,8 @@ void vtkOpenGLState::Initialize(vtkOpenGLRenderWindow*)
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void vtkOpenGLState::ResetFramebufferBindings()
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{
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::glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, (int*)&this->CurrentState.DrawBinding.Binding);
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-#ifdef GL_DRAW_BUFFER
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- ::glGetIntegerv(GL_DRAW_BUFFER, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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+#ifdef GL_DRAW_BUFFER0
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+ ::glGetIntegerv(GL_DRAW_BUFFER0, (int*)&this->CurrentState.DrawBinding.DrawBuffers[0]);
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#endif
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::glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, (int*)&this->CurrentState.ReadBinding.Binding);
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--
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2.27.0
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