FGFS-4.1/OpenSceneGraph
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Added State::glDrawBuffer/glReadBuffer() method to implement lazy state updating for glDrawBuffer and glReadBuffer

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This commit is contained in:
Robert Osfield 2018-03-06 09:49:02 +00:00
parent ee3235e7e0
commit 64341cfb72
2 changed files with 36 additions and 0 deletions
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11
include/osg/State
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@ -303,6 +303,14 @@ class OSG_EXPORT State : public Referenced
/** Apply any shader composed state.*/ /** Apply any shader composed state.*/
void applyShaderComposition(); void applyShaderComposition();
void glDrawBuffer(GLenum buffer);
GLenum getDrawBuffer() const { return _drawBuffer; }
void glReadBuffer(GLenum buffer);
GLenum getReadBuffer() const { return _readBuffer; }
/** Set whether a particular OpenGL mode is valid in the current graphics context. /** Set whether a particular OpenGL mode is valid in the current graphics context.
* Use to disable OpenGL modes that are not supported by current graphics drivers/context.*/ * Use to disable OpenGL modes that are not supported by current graphics drivers/context.*/
inline void setModeValidity(StateAttribute::GLMode mode,bool valid) inline void setModeValidity(StateAttribute::GLMode mode,bool valid)
@ -1079,6 +1087,9 @@ class OSG_EXPORT State : public Referenced
ref_ptr<FrameStamp> _frameStamp; ref_ptr<FrameStamp> _frameStamp;
GLenum _drawBuffer;
GLenum _readBuffer;
ref_ptr<const RefMatrix> _identity; ref_ptr<const RefMatrix> _identity;
ref_ptr<const RefMatrix> _initialViewMatrix; ref_ptr<const RefMatrix> _initialViewMatrix;
ref_ptr<const RefMatrix> _projection; ref_ptr<const RefMatrix> _projection;

25
src/osg/State.cpp
View File

@ -51,6 +51,9 @@ State::State():
_shaderComposer = new ShaderComposer; _shaderComposer = new ShaderComposer;
_currentShaderCompositionProgram = 0L; _currentShaderCompositionProgram = 0L;
_drawBuffer = GL_NONE;
_readBuffer = GL_NONE;
_identity = new osg::RefMatrix(); // default RefMatrix constructs to identity. _identity = new osg::RefMatrix(); // default RefMatrix constructs to identity.
_initialViewMatrix = _identity; _initialViewMatrix = _identity;
_projection = _identity; _projection = _identity;
@ -434,6 +437,28 @@ void State::reset()
} }
void State::glDrawBuffer(GLenum buffer)
{
if (_drawBuffer!=buffer)
{
#if !defined(OSG_GLES1_AVAILABLE) && !defined(OSG_GLES2_AVAILABLE) && !defined(OSG_GLES3_AVAILABLE)
glDrawBuffer(buffer);
#endif
_drawBuffer=buffer;
}
}
void State::glReadBuffer(GLenum buffer)
{
if (_readBuffer!=buffer)
{
#if !defined(OSG_GLES1_AVAILABLE) && !defined(OSG_GLES2_AVAILABLE) && !defined(OSG_GLES3_AVAILABLE)
glReadBuffer(buffer);
#endif
_readBuffer=buffer;
}
}
void State::setInitialViewMatrix(const osg::RefMatrix* matrix) void State::setInitialViewMatrix(const osg::RefMatrix* matrix)
{ {
if (matrix) _initialViewMatrix = matrix; if (matrix) _initialViewMatrix = matrix;