Radiant:
misc... * render scene to FBO to get following options: preferences->camera->MSAA (def = 8 samples) preferences->orthographic->MSAA (def = 8 samples) coloured camera POV icon w/o rerendering the scene coloured rectangular selector box w/o rerendering the scene * fallback to glCopyTexImage2D (NPoT), if FBO isn't available
This commit is contained in:
Garux
230
libs/render.h
230
libs/render.h
@@ -1197,5 +1197,235 @@ inline void ArbitraryMeshTriangle_sumTangents( ArbitraryMeshVertex& a, Arbitrary
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reinterpret_cast<Vector3&>( c.bitangent ) += t;
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}
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namespace {
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///////////////////////////////////////////////////////////////////////////////
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// check FBO completeness
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///////////////////////////////////////////////////////////////////////////////
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bool checkFramebufferStatus() {
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// check FBO status
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GLenum status = glCheckFramebufferStatus( GL_FRAMEBUFFER );
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switch( status ) {
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case GL_FRAMEBUFFER_COMPLETE:
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// globalErrorStream() << "Framebuffer complete.\n";
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return true;
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Attachment is NOT complete.\n";
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return false;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: No image is attached to FBO.\n";
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return false;
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/*
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case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Attached images have different dimensions.\n";
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return false;
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case GL_FRAMEBUFFER_INCOMPLETE_FORMATS:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Color attached images have different internal formats.\n";
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return false;
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*/
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Draw buffer.\n";
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return false;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Read buffer.\n";
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return false;
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case GL_FRAMEBUFFER_UNSUPPORTED:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Unsupported by FBO implementation.\n";
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return false;
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default:
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globalErrorStream() << "[ERROR] Framebuffer incomplete: Unknown error.\n";
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return false;
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}
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}
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} //namespace
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class FBO
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{
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public:
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FBO():
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_constructed( false ),
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_has_depth( false ),
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_width( 0 ),
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_height( 0 ),
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_fbo( 0 ),
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_tex( 0 ),
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_depth( 0 ),
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_color( 0 ){
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}
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virtual ~FBO(){
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reset( 0, 0, 0, false );
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}
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virtual void reset( int width, int height, int samples, bool has_depth ){
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_width = width;
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_height = height;
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_samples = samples;
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_has_depth = has_depth;
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if( _depth )
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glDeleteRenderbuffers( 1, &_depth );
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_depth = 0;
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if( _color )
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glDeleteRenderbuffers( 1, &_color );
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_color = 0;
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if( _fbo )
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glDeleteFramebuffers( 1, &_fbo );
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_fbo = 0;
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_constructed = false;
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}
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virtual void start(){
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// if ( GlobalOpenGL().GL_1_3() ) {
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// glDisable( GL_MULTISAMPLE );
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// }
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if( !_constructed ){
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construct();
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}
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glBindFramebuffer( GL_FRAMEBUFFER, _fbo );
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}
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virtual void save(){
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blit();
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}
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virtual void blit(){
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glBindFramebuffer( GL_READ_FRAMEBUFFER, _fbo );
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glBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 );
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//glDrawBuffer( GL_BACK );
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glBlitFramebuffer( 0, 0, _width, _height, 0, 0, _width, _height, GL_COLOR_BUFFER_BIT, GL_NEAREST );
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glBindFramebuffer( GL_FRAMEBUFFER, 0 );
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}
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protected:
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bool _constructed;
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bool _has_depth;
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int _width;
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int _height;
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int _samples;
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GLuint _fbo;
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GLuint _tex;
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GLuint _depth;
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GLuint _color;
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virtual void construct() {
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int curSamples;
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glGetIntegerv( GL_SAMPLES, &curSamples );
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if( curSamples > 0 && _samples != 0 ){
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_samples = curSamples;
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}
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else{
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int maxSamples;
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glGetIntegerv( GL_MAX_SAMPLES, &maxSamples );
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if( _samples > maxSamples ){
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_samples = maxSamples;
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}
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}
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glGenFramebuffers( 1, &_fbo );
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glBindFramebuffer( GL_FRAMEBUFFER, _fbo );
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// Color buffer
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glGenRenderbuffers( 1, &_color );
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glBindRenderbuffer( GL_RENDERBUFFER, _color );
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glRenderbufferStorageMultisample( GL_RENDERBUFFER, _samples, GL_RGBA8, _width, _height );
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glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, _color );
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if( _has_depth ){
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// Depth buffer
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glGenRenderbuffers( 1, &_depth );
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glBindRenderbuffer( GL_RENDERBUFFER, _depth );
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glRenderbufferStorageMultisample( GL_RENDERBUFFER, _samples, GL_DEPTH_COMPONENT, _width, _height );
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glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, _depth );
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}
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if( !checkFramebufferStatus() && _samples > 0 ){
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globalErrorStream() << "Falling back to no multisampling.\n";
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_samples = 0;
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reset( _width, _height, 0, _has_depth );
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construct();
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}
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_constructed = true;
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}
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private:
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};
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class FBO_fallback : public FBO
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{
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public:
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~FBO_fallback(){
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reset( 0, 0, 0, false );
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}
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void reset( int width, int height, int samples, bool has_depth ){
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_width = width;
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_height = height;
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if( _tex )
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glDeleteTextures( 1, &_tex );
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_tex = 0;
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_constructed = false;
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}
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void start(){
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if( !_constructed ){
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construct();
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}
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}
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void save(){
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glBindTexture( GL_TEXTURE_2D, _tex );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
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glCopyTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, 0, 0, _width, _height, 0 );
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//glCopyTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, 0, 0, m_nWidth, m_nHeight );
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glBindTexture( GL_TEXTURE_2D, 0 );
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}
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void blit(){
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glViewport( 0, 0, _width, _height );
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glMatrixMode( GL_PROJECTION );
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glLoadIdentity();
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glOrtho( 0, _width, 0, _height, -100, 100 );
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glMatrixMode( GL_MODELVIEW );
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glLoadIdentity();
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glDisable( GL_LINE_STIPPLE );
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glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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glDisableClientState( GL_NORMAL_ARRAY );
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glDisableClientState( GL_COLOR_ARRAY );
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glDisable( GL_LIGHTING );
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glDisable( GL_COLOR_MATERIAL );
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glDisable( GL_DEPTH_TEST );
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glDisable( GL_TEXTURE_1D );
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glEnable( GL_TEXTURE_2D );
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glDisable( GL_BLEND );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
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glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
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glBindTexture( GL_TEXTURE_2D, _tex );
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glColor4f( 1.0, 1.0, 1.0, 1.0 );
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glBegin( GL_QUADS );
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glTexCoord2f( 0, 0 );
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glVertex3f( 0, 0, 0 );
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glTexCoord2f( 0, 1 );
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glVertex3f( 0, _height, 0 );
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glTexCoord2f( 1, 1 );
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glVertex3f( _width, _height, 0 );
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glTexCoord2f( 1, 0 );
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glVertex3f( _width, 0, 0 );
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glEnd();
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glBindTexture( GL_TEXTURE_2D, 0 );
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}
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protected:
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void construct() {
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glGenTextures( 1, &_tex );
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_constructed = true;
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}
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private:
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};
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#endif
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