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cleanup in Snapshot()
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@ -47,12 +47,10 @@ extern void (*glBindFramebuffer) (GLenum target, GLuint framebuffer);
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extern void (*glBindRenderbuffer) (GLenum target, GLuint renderbuffer);
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extern void (*glDeleteFramebuffers) (GLsizei n, const GLuint *framebuffers);
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extern void (*glDeleteRenderbuffers) (GLsizei n, const GLuint *renderbuffers);
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extern void (*glFramebufferTexture) (GLenum target, GLenum attachment, GLuint texture, GLint level);
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extern void (*glGenFramebuffers) (GLsizei n, GLuint *framebuffers);
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extern void (*glGenRenderbuffers) (GLsizei n, GLuint *renderbuffers);
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extern void (*glRenderbufferStorage) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
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extern void (*glFramebufferRenderbuffer) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
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extern void (*glNamedFramebufferReadBuffer) ( GLuint framebuffer, GLenum mode);
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#endif
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DLL_HEADER void LoadOpenGLFunctionPointers();
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#endif // INCOPENGL_HPP___
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@ -783,7 +783,12 @@ namespace netgen
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std::vector<unsigned char> Snapshot( int w, int h )
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{
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// save current settings
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GLint viewport[4];
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glGetIntegerv (GL_VIEWPORT, viewport);
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glMatrixMode (GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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double pnear = 0.1;
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@ -792,49 +797,47 @@ namespace netgen
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gluPerspective(20.0f, double(w) / h, pnear, pfar);
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glMatrixMode (GL_MODELVIEW);
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glPushMatrix();
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glLoadIdentity();
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glViewport(0,0,w,h);
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GLuint fb = 0;
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glGenFramebuffers(1, &fb);
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glBindFramebuffer(GL_FRAMEBUFFER, fb);
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GLuint tex;
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glGenTextures(1, &tex);
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// create, reserve and attach color and depth renderbuffer
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GLuint rbs[2];
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glGenRenderbuffers(2, rbs);
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glBindRenderbuffer(GL_RENDERBUFFER, rbs[0]);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, w, h);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbs[0]);
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glBindTexture(GL_TEXTURE_2D, tex);
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glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA, w, h, 0,GL_RGBA, GL_UNSIGNED_BYTE, 0);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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GLuint depthrenderbuffer;
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glGenRenderbuffers(1, &depthrenderbuffer);
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glBindRenderbuffer(GL_RENDERBUFFER, depthrenderbuffer);
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glBindRenderbuffer(GL_RENDERBUFFER, rbs[1]);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, w, h);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthrenderbuffer);
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex, 0);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbs[1]);
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// check if framebuffer status is complete
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if(int fbstatus; (fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER)) != GL_FRAMEBUFFER_COMPLETE)
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cerr << "no frame buffer " << fbstatus << endl;
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glBindFramebuffer(GL_FRAMEBUFFER, fb);
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glViewport(0,0,w,h);
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glPushMatrix();
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visual_scene->DrawScene();
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glFinish();
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glPopMatrix();
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std::vector<unsigned char> buffer(w*h*3);
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glPixelStorei(GL_UNPACK_ALIGNMENT,1);
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glPixelStorei(GL_PACK_ALIGNMENT,1);
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glReadPixels (0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, &buffer[0]);
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glDeleteRenderbuffers(1, &depthrenderbuffer);
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glDeleteTextures(1, &tex);
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glDeleteRenderbuffers(2, rbs);
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glDeleteFramebuffers(1, &fb);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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// restore previous settings
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glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
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glMatrixMode (GL_PROJECTION);
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glPopMatrix();
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glMatrixMode (GL_MODELVIEW);
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glPopMatrix();
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return buffer;
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}
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@ -4896,12 +4896,10 @@ void (*glBindFramebuffer) (GLenum target, GLuint framebuffer);
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void (*glBindRenderbuffer) (GLenum target, GLuint renderbuffer);
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void (*glDeleteFramebuffers) (GLsizei n, const GLuint *framebuffers);
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void (*glDeleteRenderbuffers) (GLsizei n, const GLuint *renderbuffers);
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void (*glFramebufferTexture) (GLenum target, GLenum attachment, GLuint texture, GLint level);
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void (*glGenFramebuffers) (GLsizei n, GLuint *framebuffers);
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void (*glGenRenderbuffers) (GLsizei n, GLuint *renderbuffers);
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void (*glRenderbufferStorage) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
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void (*glFramebufferRenderbuffer) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
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void (*glNamedFramebufferReadBuffer) ( GLuint framebuffer, GLenum mode);
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DLL_HEADER void LoadOpenGLFunctionPointers() {
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#ifdef USE_BUFFERS
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@ -4918,12 +4916,10 @@ DLL_HEADER void LoadOpenGLFunctionPointers() {
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glBindRenderbuffer = (decltype(glBindRenderbuffer )) wglGetProcAddress("glBindRenderbuffer");
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glDeleteFramebuffers = (decltype(glDeleteFramebuffers )) wglGetProcAddress("glDeleteFramebuffers");
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glDeleteRenderbuffers = (decltype(glDeleteRenderbuffers )) wglGetProcAddress("glDeleteRenderbuffers");
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glFramebufferTexture = (decltype(glFramebufferTexture )) wglGetProcAddress("glFramebufferTexture");
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glGenFramebuffers = (decltype(glGenFramebuffers )) wglGetProcAddress("glGenFramebuffers");
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glGenRenderbuffers = (decltype(glGenRenderbuffers )) wglGetProcAddress("glGenRenderbuffers");
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glRenderbufferStorage = (decltype(glRenderbufferStorage )) wglGetProcAddress("glRenderbufferStorage");
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glFramebufferRenderbuffer = (decltype(glFramebufferRenderbuffer )) wglGetProcAddress("glFramebufferRenderbuffer");
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glNamedFramebufferReadBuffer = (decltype(glNamedFramebufferReadBuffer )) wglGetProcAddress("glNamedFramebufferReadBuffer");
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}
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#else // WIN32
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DLL_HEADER void LoadOpenGLFunctionPointers() { }
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