diff options
Diffstat (limited to 'examples/gui/openglwindow/main.cpp')
-rw-r--r-- | examples/gui/openglwindow/main.cpp | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/examples/gui/openglwindow/main.cpp b/examples/gui/openglwindow/main.cpp index d1e5d3871e..03a6ece06f 100644 --- a/examples/gui/openglwindow/main.cpp +++ b/examples/gui/openglwindow/main.cpp @@ -67,9 +67,9 @@ public: void render() override; private: - GLuint m_posAttr = 0; - GLuint m_colAttr = 0; - GLuint m_matrixUniform = 0; + GLint m_posAttr = 0; + GLint m_colAttr = 0; + GLint m_matrixUniform = 0; QOpenGLShaderProgram *m_program = nullptr; int m_frame = 0; @@ -122,8 +122,11 @@ void TriangleWindow::initialize() m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource); m_program->link(); m_posAttr = m_program->attributeLocation("posAttr"); + Q_ASSERT(m_posAttr != -1); m_colAttr = m_program->attributeLocation("colAttr"); + Q_ASSERT(m_colAttr != -1); m_matrixUniform = m_program->uniformLocation("matrix"); + Q_ASSERT(m_matrixUniform != -1); } //! [4] @@ -144,13 +147,13 @@ void TriangleWindow::render() m_program->setUniformValue(m_matrixUniform, matrix); - GLfloat vertices[] = { - 0.0f, 0.707f, + static const GLfloat vertices[] = { + 0.0f, 0.707f, -0.5f, -0.5f, - 0.5f, -0.5f + 0.5f, -0.5f }; - GLfloat colors[] = { + static const GLfloat colors[] = { 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f @@ -159,13 +162,13 @@ void TriangleWindow::render() glVertexAttribPointer(m_posAttr, 2, GL_FLOAT, GL_FALSE, 0, vertices); glVertexAttribPointer(m_colAttr, 3, GL_FLOAT, GL_FALSE, 0, colors); - glEnableVertexAttribArray(0); - glEnableVertexAttribArray(1); + glEnableVertexAttribArray(m_posAttr); + glEnableVertexAttribArray(m_colAttr); glDrawArrays(GL_TRIANGLES, 0, 3); - glDisableVertexAttribArray(1); - glDisableVertexAttribArray(0); + glDisableVertexAttribArray(m_colAttr); + glDisableVertexAttribArray(m_posAttr); m_program->release(); |