mirror of https://github.com/odrling/Aegisub
Better dealing of shaders.
Originally committed to SVN as r976.
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@ -265,7 +265,13 @@ void OpenGLWrapper::SetModeFill() {
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//////////////////////////
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// Are shaders available?
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bool OpenGLWrapper::ShadersAvailable() {
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return IsExtensionSupported("GL_ARB_vertex_shader") && IsExtensionSupported("GL_ARB_fragment_shader");
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bool available = IsExtensionSupported("GL_ARB_vertex_shader") && IsExtensionSupported("GL_ARB_fragment_shader");
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static bool first = true;
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if (first) {
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first = false;
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wxMessageBox(_T("Warning, OpenGL shaders are not available on this machine. YV12 video will be on greyscale."),_T("GL Shaders Error"));
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}
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return available;
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}
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@ -311,17 +317,23 @@ void OpenGLWrapper::Initialize() {
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//////////////////////
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// Set current shader
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void OpenGLWrapper::SetShader(GLuint i) {
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if (UseShaders()) {
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Initialize();
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glUseProgramObjectARB(i);
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if (glGetError()) throw _T("Could not set shader program.");
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}
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}
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//////////////////////////
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// Destroy shader program
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void OpenGLWrapper::DestroyShaderProgram(GLuint i) {
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if (UseShaders()) {
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Initialize();
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SetShader(0);
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glDeleteObjectARB(i);
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if (glGetError()) throw _T("Error removing shader program.");
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}
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}
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