1fb9f6f13a
The main advantage of SPDX license identifiers over the traditional license headers is that it's more difficult to overlook inappropriate licenses for kwin, for example GPL 3. We also don't have to copy a lot of boilerplate text. In order to create this change, I ran licensedigger -r -c from the toplevel source directory.
91 lines
3.5 KiB
C++
91 lines
3.5 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2007 Rivo Laks <rivolaks@hot.ee>
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SPDX-License-Identifier: GPL-2.0-or-later
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*********************************************************************/
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#include "kwinglutils.h"
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#include "kwinglplatform.h"
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// Resolves given function, using getProcAddress
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// Useful when functionality is defined in an extension with a different name
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#define GL_RESOLVE_WITH_EXT( function, symbolName ) \
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function = (function ## _func)resolveFunction( #symbolName );
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namespace KWin
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{
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static GLenum GetGraphicsResetStatus();
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static void ReadnPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
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GLenum type, GLsizei bufSize, GLvoid *data);
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static void GetnUniformfv(GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
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// GL_ARB_robustness / GL_EXT_robustness
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glGetGraphicsResetStatus_func glGetGraphicsResetStatus;
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glReadnPixels_func glReadnPixels;
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glGetnUniformfv_func glGetnUniformfv;
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void glResolveFunctions(const std::function<resolveFuncPtr(const char*)> &resolveFunction)
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{
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const bool haveArbRobustness = hasGLExtension(QByteArrayLiteral("GL_ARB_robustness"));
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const bool haveExtRobustness = hasGLExtension(QByteArrayLiteral("GL_EXT_robustness"));
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bool robustContext = false;
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if (GLPlatform::instance()->isGLES()) {
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if (haveExtRobustness) {
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GLint value = 0;
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glGetIntegerv(GL_CONTEXT_ROBUST_ACCESS_EXT, &value);
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robustContext = (value != 0);
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}
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} else {
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if (haveArbRobustness) {
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if (hasGLVersion(3, 0)) {
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GLint value = 0;
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glGetIntegerv(GL_CONTEXT_FLAGS, &value);
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if (value & GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB) {
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robustContext = true;
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}
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} else {
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robustContext = true;
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}
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}
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}
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if (robustContext && haveArbRobustness) {
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// See https://www.opengl.org/registry/specs/ARB/robustness.txt
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GL_RESOLVE_WITH_EXT(glGetGraphicsResetStatus, glGetGraphicsResetStatusARB);
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GL_RESOLVE_WITH_EXT(glReadnPixels, glReadnPixelsARB);
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GL_RESOLVE_WITH_EXT(glGetnUniformfv, glGetnUniformfvARB);
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} else if (robustContext && haveExtRobustness) {
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// See https://www.khronos.org/registry/gles/extensions/EXT/EXT_robustness.txt
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glGetGraphicsResetStatus = (glGetGraphicsResetStatus_func) resolveFunction("glGetGraphicsResetStatusEXT");
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glReadnPixels = (glReadnPixels_func) resolveFunction("glReadnPixelsEXT");
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glGetnUniformfv = (glGetnUniformfv_func) resolveFunction("glGetnUniformfvEXT");
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} else {
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glGetGraphicsResetStatus = KWin::GetGraphicsResetStatus;
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glReadnPixels = KWin::ReadnPixels;
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glGetnUniformfv = KWin::GetnUniformfv;
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}
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}
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static GLenum GetGraphicsResetStatus()
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{
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return GL_NO_ERROR;
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}
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static void ReadnPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
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GLenum type, GLsizei bufSize, GLvoid *data)
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{
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Q_UNUSED(bufSize)
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glReadPixels(x, y, width, height, format, type, data);
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}
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static void GetnUniformfv(GLuint program, GLint location, GLsizei bufSize, GLfloat *params)
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{
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Q_UNUSED(bufSize)
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glGetUniformfv(program, location, params);
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}
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} // namespace
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