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Improved OpenGL error handling for basic example.

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This commit is contained in:
Matt Williams 2011-04-25 01:18:40 +02:00
parent 6b4c7686e6
commit f93c25acaf
1 changed files with 36 additions and 3 deletions
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39
examples/Basic/OpenGLWidget.cpp
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@ -37,11 +37,37 @@ void OpenGLWidget::setSurfaceMeshToRender(const PolyVox::SurfaceMesh<PositionMat
void OpenGLWidget::initializeGL()
{
//We need GLEW to access recent OpenGL functionality
GLenum err = glewInit();
if (GLEW_OK != err)
std::cout << "Initialising GLEW...";
GLenum result = glewInit();
if (result == GLEW_OK)
{
std::cout << "success" << std::endl;
}
else
{
/* Problem: glewInit failed, something is seriously wrong. */
std::cout << "GLEW Error: " << glewGetErrorString(err) << std::endl;
std::cout << "failed" << std::endl;
std::cout << "Initialising GLEW failed with the following error: " << glewGetErrorString(result) << std::endl;
exit(EXIT_FAILURE);
}
//Print out some information about the OpenGL implementation.
std::cout << "OpenGL Implementation Details:" << std::endl;
if(glGetString(GL_VENDOR))
std::cout << "\tGL_VENDOR: " << glGetString(GL_VENDOR) << std::endl;
if(glGetString(GL_RENDERER))
std::cout << "\tGL_RENDERER: " << glGetString(GL_RENDERER) << std::endl;
if(glGetString(GL_VERSION))
std::cout << "\tGL_VERSION: " << glGetString(GL_VERSION) << std::endl;
if(glGetString(GL_SHADING_LANGUAGE_VERSION))
std::cout << "\tGL_SHADING_LANGUAGE_VERSION: " << glGetString(GL_SHADING_LANGUAGE_VERSION) << std::endl;
//Check our version of OpenGL is recent enough.
//We need at least 1.5 for vertex buffer objects,
if (!GLEW_VERSION_1_5)
{
std::cout << "Error: You need OpenGL version 1.5 to run this example." << std::endl;
exit(EXIT_FAILURE);
}
//Set up the clear colour
@ -97,6 +123,13 @@ void OpenGLWidget::paintGL()
glNormalPointer(GL_FLOAT, sizeof(PositionMaterialNormal), (GLvoid*)12);
glDrawRangeElements(GL_TRIANGLES, m_uBeginIndex, m_uEndIndex-1, m_uEndIndex - m_uBeginIndex, GL_UNSIGNED_INT, 0);
GLenum errCode = glGetError();
if(errCode != GL_NO_ERROR)
{
//What has replaced getErrorString() in the latest OpenGL?
std::cout << "OpenGL Error: " << errCode << std::endl;
}
}
void OpenGLWidget::mousePressEvent(QMouseEvent* event)