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Better dealing of shaders.

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Originally committed to SVN as r976.
This commit is contained in:
Rodrigo Braz Monteiro 2007-04-02 00:44:47 +00:00
parent 6b26ebd99b
commit 77e21c985d
1 changed files with 18 additions and 6 deletions
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24
aegisub/gl_wrap.cpp
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@ -265,7 +265,13 @@ void OpenGLWrapper::SetModeFill() {
//////////////////////////
// Are shaders available?
bool OpenGLWrapper::ShadersAvailable() {
return IsExtensionSupported("GL_ARB_vertex_shader") && IsExtensionSupported("GL_ARB_fragment_shader");
bool available = IsExtensionSupported("GL_ARB_vertex_shader") && IsExtensionSupported("GL_ARB_fragment_shader");
static bool first = true;
if (first) {
first = false;
wxMessageBox(_T("Warning, OpenGL shaders are not available on this machine. YV12 video will be on greyscale."),_T("GL Shaders Error"));
}
return available;
}
@ -311,17 +317,23 @@ void OpenGLWrapper::Initialize() {
//////////////////////
// Set current shader
void OpenGLWrapper::SetShader(GLuint i) {
Initialize();
glUseProgramObjectARB(i);
if (UseShaders()) {
Initialize();
glUseProgramObjectARB(i);
if (glGetError()) throw _T("Could not set shader program.");
}
}
//////////////////////////
// Destroy shader program
void OpenGLWrapper::DestroyShaderProgram(GLuint i) {
Initialize();
SetShader(0);
glDeleteObjectARB(i);
if (UseShaders()) {
Initialize();
SetShader(0);
glDeleteObjectARB(i);
if (glGetError()) throw _T("Error removing shader program.");
}
}