499 lines
19 KiB
C++
499 lines
19 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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// initial FBO support written by Marco Jez, June 2005.
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#ifndef OSG_FRAMEBUFFEROBJECT
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#define OSG_FRAMEBUFFEROBJECT 1
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#include <osg/GL>
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#include <osg/Texture>
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#include <osg/buffered_value>
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#include <osg/Camera>
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#ifndef GL_EXT_framebuffer_object
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#define GL_EXT_framebuffer_object 1
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#define GL_FRAMEBUFFER_EXT 0x8D40
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#define GL_RENDERBUFFER_EXT 0x8D41
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// #define GL_STENCIL_INDEX_EXT 0x8D45 // removed in rev. #114 of the spec
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#define GL_STENCIL_INDEX1_EXT 0x8D46
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#define GL_STENCIL_INDEX4_EXT 0x8D47
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#define GL_STENCIL_INDEX8_EXT 0x8D48
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#define GL_STENCIL_INDEX16_EXT 0x8D49
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#define GL_RENDERBUFFER_WIDTH_EXT 0x8D42
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#define GL_RENDERBUFFER_HEIGHT_EXT 0x8D43
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#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT 0x8D44
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#define GL_RENDERBUFFER_RED_SIZE_EXT 0x8D50
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#define GL_RENDERBUFFER_GREEN_SIZE_EXT 0x8D51
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#define GL_RENDERBUFFER_BLUE_SIZE_EXT 0x8D52
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#define GL_RENDERBUFFER_ALPHA_SIZE_EXT 0x8D53
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#define GL_RENDERBUFFER_DEPTH_SIZE_EXT 0x8D54
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#define GL_RENDERBUFFER_STENCIL_SIZE_EXT 0x8D55
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#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT 0x8CD0
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#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT 0x8CD1
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT 0x8CD2
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT 0x8CD3
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT 0x8CD4
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT 0x8CD4
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#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
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#define GL_COLOR_ATTACHMENT1_EXT 0x8CE1
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#define GL_COLOR_ATTACHMENT2_EXT 0x8CE2
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#define GL_COLOR_ATTACHMENT3_EXT 0x8CE3
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#define GL_COLOR_ATTACHMENT4_EXT 0x8CE4
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#define GL_COLOR_ATTACHMENT5_EXT 0x8CE5
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#define GL_COLOR_ATTACHMENT6_EXT 0x8CE6
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#define GL_COLOR_ATTACHMENT7_EXT 0x8CE7
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#define GL_COLOR_ATTACHMENT8_EXT 0x8CE8
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#define GL_COLOR_ATTACHMENT9_EXT 0x8CE9
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#define GL_COLOR_ATTACHMENT10_EXT 0x8CEA
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#define GL_COLOR_ATTACHMENT11_EXT 0x8CEB
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#define GL_COLOR_ATTACHMENT12_EXT 0x8CEC
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#define GL_COLOR_ATTACHMENT13_EXT 0x8CED
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#define GL_COLOR_ATTACHMENT14_EXT 0x8CEE
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#define GL_COLOR_ATTACHMENT15_EXT 0x8CEF
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#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
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#define GL_STENCIL_ATTACHMENT_EXT 0x8D20
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#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
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#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT 0x8CD6
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#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT 0x8CD7
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#define GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT 0x8CD8
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#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT 0x8CD9
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#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT 0x8CDA
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#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT 0x8CDB
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#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT 0x8CDC
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#define GL_FRAMEBUFFER_UNSUPPORTED_EXT 0x8CDD
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#define GL_FRAMEBUFFER_BINDING_EXT 0x8CA6
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#define GL_RENDERBUFFER_BINDING_EXT 0x8CA7
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#define GL_MAX_COLOR_ATTACHMENTS_EXT 0x8CDF
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#define GL_MAX_RENDERBUFFER_SIZE_EXT 0x84E8
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#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT 0x0506
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#endif
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#ifndef GL_EXT_framebuffer_blit
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#define GL_EXT_framebuffer_blit 1
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#define GL_DRAW_FRAMEBUFFER_BINDING_EXT 0x8CA6
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#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
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#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
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#define GL_READ_FRAMEBUFFER_BINDING_EXT 0x8CAA
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#endif
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#ifndef GL_EXT_framebuffer_multisample
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#define GL_EXT_framebuffer_multisample 1
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#define GL_RENDERBUFFER_SAMPLES_EXT 0x8CAB
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#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT 0x8D56
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#define GL_MAX_SAMPLES_EXT 0x8D57
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#endif
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#ifndef GL_MAX_SAMPLES_EXT
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// Workaround for Centos 5 and other distros that define
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// GL_EXT_framebuffer_multisample but not GL_MAX_SAMPLES_EXT
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#define GL_MAX_SAMPLES_EXT 0x8D57
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#endif
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#ifndef GL_NV_framebuffer_multisample_coverage
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#define GL_NV_framebuffer_multisample_coverage 1
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#define GL_RENDERBUFFER_COVERAGE_SAMPLES_NV 0x8CAB
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#define GL_RENDERBUFFER_COLOR_SAMPLES_NV 0x8E10
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#define GL_MAX_MULTISAMPLE_COVERAGE_MODES_NV 0x8E11
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#define GL_MULTISAMPLE_COVERAGE_MODES_NV 0x8E12
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#endif
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#ifndef GL_DEPTH_COMPONENT
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#define GL_DEPTH_COMPONENT 0x1902
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#endif
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#ifndef GL_VERSION_1_4
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#define GL_DEPTH_COMPONENT16 0x81A5
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#define GL_DEPTH_COMPONENT24 0x81A6
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#define GL_DEPTH_COMPONENT32 0x81A7
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#endif
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#ifndef GL_DEPTH_COMPONENT32F
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#define GL_DEPTH_COMPONENT32F 0x8CAC
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#endif
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#ifndef GL_DEPTH_COMPONENT32F_NV
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#define GL_DEPTH_COMPONENT32F_NV 0x8DAB
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#endif
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#ifndef GL_EXT_packed_depth_stencil
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#define GL_EXT_packed_depth_stencil 1
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#define GL_DEPTH_STENCIL_EXT 0x84F9
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#define GL_UNSIGNED_INT_24_8_EXT 0x84FA
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#define GL_DEPTH24_STENCIL8_EXT 0x88F0
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#define GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1
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#endif
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namespace osg
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{
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/**************************************************************************
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* FBOExtensions
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**************************************************************************/
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class OSG_EXPORT FBOExtensions : public osg::Referenced
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{
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public:
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typedef void APIENTRY TglBindRenderbuffer(GLenum, GLuint);
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typedef void APIENTRY TglDeleteRenderbuffers(GLsizei n, const GLuint *renderbuffers);
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typedef void APIENTRY TglGenRenderbuffers(GLsizei, GLuint *);
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typedef void APIENTRY TglRenderbufferStorage(GLenum, GLenum, GLsizei, GLsizei);
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typedef void APIENTRY TglRenderbufferStorageMultisample(GLenum, GLsizei, GLenum, GLsizei, GLsizei);
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typedef void APIENTRY TglRenderbufferStorageMultisampleCoverageNV(GLenum, GLsizei, GLsizei, GLenum, GLsizei, GLsizei);
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typedef void APIENTRY TglBindFramebuffer(GLenum, GLuint);
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typedef void APIENTRY TglDeleteFramebuffers(GLsizei n, const GLuint *framebuffers);
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typedef void APIENTRY TglGenFramebuffers(GLsizei, GLuint *);
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typedef GLenum APIENTRY TglCheckFramebufferStatus(GLenum);
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typedef void APIENTRY TglFramebufferTexture1D(GLenum, GLenum, GLenum, GLuint, GLint);
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typedef void APIENTRY TglFramebufferTexture2D(GLenum, GLenum, GLenum, GLuint, GLint);
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typedef void APIENTRY TglFramebufferTexture3D(GLenum, GLenum, GLenum, GLuint, GLint, GLint);
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typedef void APIENTRY TglFramebufferTextureLayer(GLenum, GLenum, GLuint, GLint, GLint);
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typedef void APIENTRY TglFramebufferRenderbuffer(GLenum, GLenum, GLenum, GLuint);
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typedef void APIENTRY TglGenerateMipmap(GLenum);
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typedef void APIENTRY TglBlitFramebuffer(GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum);
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typedef void APIENTRY TglGetRenderbufferParameteriv(GLenum, GLenum, GLint*);
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TglBindRenderbuffer* glBindRenderbuffer;
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TglGenRenderbuffers* glGenRenderbuffers;
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TglDeleteRenderbuffers* glDeleteRenderbuffers;
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TglRenderbufferStorage* glRenderbufferStorage;
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TglRenderbufferStorageMultisample* glRenderbufferStorageMultisample;
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TglRenderbufferStorageMultisampleCoverageNV* glRenderbufferStorageMultisampleCoverageNV;
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TglBindFramebuffer* glBindFramebuffer;
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TglDeleteFramebuffers* glDeleteFramebuffers;
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TglGenFramebuffers* glGenFramebuffers;
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TglCheckFramebufferStatus* glCheckFramebufferStatus;
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TglFramebufferTexture1D* glFramebufferTexture1D;
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TglFramebufferTexture2D* glFramebufferTexture2D;
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TglFramebufferTexture3D* glFramebufferTexture3D;
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TglFramebufferTextureLayer* glFramebufferTextureLayer;
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TglFramebufferRenderbuffer* glFramebufferRenderbuffer;
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TglGenerateMipmap* glGenerateMipmap;
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TglBlitFramebuffer* glBlitFramebuffer;
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TglGetRenderbufferParameteriv* glGetRenderbufferParameteriv;
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static FBOExtensions* instance(unsigned contextID, bool createIfNotInitalized);
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bool isSupported() const { return _supported; }
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bool isMultisampleSupported() const { return glRenderbufferStorageMultisample != 0; }
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bool isMultisampleCoverageSupported() const { return glRenderbufferStorageMultisampleCoverageNV != 0; }
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bool isPackedDepthStencilSupported() const { return _packed_depth_stencil_supported; }
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protected:
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FBOExtensions(unsigned int contextID);
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bool _supported;
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bool _packed_depth_stencil_supported;
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};
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/**************************************************************************
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* RenderBuffer
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**************************************************************************/
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class OSG_EXPORT RenderBuffer: public Object
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{
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public:
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RenderBuffer();
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RenderBuffer(int width, int height, GLenum internalFormat, int samples=0, int colorSamples=0);
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RenderBuffer(const RenderBuffer& copy, const CopyOp& copyop = CopyOp::SHALLOW_COPY);
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META_Object(osg, RenderBuffer);
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inline int getWidth() const;
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inline int getHeight() const;
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inline void setWidth(int w);
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inline void setHeight(int h);
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inline void setSize(int w, int h);
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inline GLenum getInternalFormat() const;
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inline void setInternalFormat(GLenum format);
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inline int getSamples() const;
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inline int getColorSamples() const;
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inline void setSamples(int samples);
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inline void setColorSamples(int colorSamples);
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GLuint getObjectID(unsigned int contextID, const FBOExtensions *ext) const;
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inline int compare(const RenderBuffer &rb) const;
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/** Mark internal RenderBuffer for deletion.
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* Deletion requests are queued until they can be executed
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* in the proper GL context. */
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static void deleteRenderBuffer(unsigned int contextID, GLuint rb);
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/** flush all the cached RenderBuffers which need to be deleted
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* in the OpenGL context related to contextID.*/
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static void flushDeletedRenderBuffers(unsigned int contextID,double currentTime, double& availableTime);
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/** discard all the cached RenderBuffers which need to be deleted in the OpenGL context related to contextID.
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* Note, unlike flush no OpenGL calls are made, instead the handles are all removed.
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* this call is useful for when an OpenGL context has been destroyed. */
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static void discardDeletedRenderBuffers(unsigned int contextID);
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static int getMaxSamples(unsigned int contextID, const FBOExtensions *ext);
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protected:
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virtual ~RenderBuffer();
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RenderBuffer &operator=(const RenderBuffer &) { return *this; }
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inline void dirtyAll() const;
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private:
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mutable buffered_value<GLuint> _objectID;
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mutable buffered_value<int> _dirty;
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GLenum _internalFormat;
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int _width;
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int _height;
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// "samples" in the framebuffer_multisample extension is equivalent to
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// "coverageSamples" in the framebuffer_multisample_coverage extension.
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int _samples;
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int _colorSamples;
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};
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// INLINE METHODS
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inline int RenderBuffer::getWidth() const
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{
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return _width;
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}
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inline int RenderBuffer::getHeight() const
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{
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return _height;
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}
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inline void RenderBuffer::setWidth(int w)
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{
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_width = w;
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dirtyAll();
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}
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inline void RenderBuffer::setHeight(int h)
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{
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_height = h;
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dirtyAll();
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}
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inline void RenderBuffer::setSize(int w, int h)
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{
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_width = w;
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_height = h;
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dirtyAll();
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}
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inline GLenum RenderBuffer::getInternalFormat() const
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{
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return _internalFormat;
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}
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inline void RenderBuffer::setInternalFormat(GLenum format)
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{
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_internalFormat = format;
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dirtyAll();
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}
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inline int RenderBuffer::getSamples() const
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{
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return _samples;
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}
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inline int RenderBuffer::getColorSamples() const
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{
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return _colorSamples;
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}
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inline void RenderBuffer::setSamples(int samples)
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{
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_samples = samples;
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dirtyAll();
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}
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inline void RenderBuffer::setColorSamples(int colorSamples)
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{
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_colorSamples = colorSamples;
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dirtyAll();
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}
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inline void RenderBuffer::dirtyAll() const
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{
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_dirty.setAllElementsTo(1);
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}
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inline int RenderBuffer::compare(const RenderBuffer &rb) const
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{
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if (&rb == this) return 0;
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if (_internalFormat < rb._internalFormat) return -1;
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if (_internalFormat > rb._internalFormat) return 1;
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if (_width < rb._width) return -1;
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if (_width > rb._width) return 1;
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if (_height < rb._height) return -1;
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if (_height > rb._height) return 1;
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return 0;
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}
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/**************************************************************************
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* FrameBufferAttachement
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**************************************************************************/
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class Texture1D;
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class Texture2D;
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class Texture3D;
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class Texture2DArray;
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class TextureCubeMap;
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class TextureRectangle;
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class OSG_EXPORT FrameBufferAttachment
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{
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public:
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FrameBufferAttachment();
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FrameBufferAttachment(const FrameBufferAttachment& copy);
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explicit FrameBufferAttachment(RenderBuffer* target);
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explicit FrameBufferAttachment(Texture1D* target, int level = 0);
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explicit FrameBufferAttachment(Texture2D* target, int level = 0);
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explicit FrameBufferAttachment(Texture3D* target, int zoffset, int level = 0);
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explicit FrameBufferAttachment(Texture2DArray* target, int layer, int level = 0);
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explicit FrameBufferAttachment(TextureCubeMap* target, int face, int level = 0);
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explicit FrameBufferAttachment(TextureRectangle* target);
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explicit FrameBufferAttachment(Camera::Attachment& attachment);
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~FrameBufferAttachment();
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FrameBufferAttachment&operator = (const FrameBufferAttachment& copy);
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bool isMultisample() const;
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void createRequiredTexturesAndApplyGenerateMipMap(State& state, const FBOExtensions* ext) const;
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void attach(State &state, GLenum target, GLenum attachment_point, const FBOExtensions* ext) const;
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int compare(const FrameBufferAttachment &fa) const;
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RenderBuffer* getRenderBuffer();
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const RenderBuffer* getRenderBuffer() const;
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Texture* getTexture();
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const Texture* getTexture() const;
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int getCubeMapFace() const;
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int getTextureLevel() const;
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int getTexture3DZOffset() const;
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int getTextureArrayLayer() const;
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private:
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// use the Pimpl idiom to avoid dependency from
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// all Texture* headers
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struct Pimpl;
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Pimpl* _ximpl;
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};
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/**************************************************************************
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* FrameBufferObject
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**************************************************************************/
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class OSG_EXPORT FrameBufferObject: public StateAttribute
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{
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public:
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typedef std::map<Camera::BufferComponent, FrameBufferAttachment> AttachmentMap;
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typedef std::vector<GLenum> MultipleRenderingTargets;
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typedef Camera::BufferComponent BufferComponent;
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FrameBufferObject();
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FrameBufferObject(const FrameBufferObject& copy, const CopyOp& copyop = CopyOp::SHALLOW_COPY);
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META_StateAttribute(osg, FrameBufferObject, (StateAttribute::Type)0x101010/*FrameBufferObject*/);
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inline const AttachmentMap& getAttachmentMap() const;
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void setAttachment(BufferComponent attachment_point, const FrameBufferAttachment &attachment);
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inline const FrameBufferAttachment& getAttachment(BufferComponent attachment_point) const;
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inline bool hasAttachment(BufferComponent attachment_point) const;
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inline bool hasMultipleRenderingTargets() const { return !_drawBuffers.empty(); }
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inline const MultipleRenderingTargets& getMultipleRenderingTargets() const { return _drawBuffers; }
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bool isMultisample() const;
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int compare(const StateAttribute &sa) const;
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void apply(State &state) const;
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enum BindTarget
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{
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READ_FRAMEBUFFER = GL_READ_FRAMEBUFFER_EXT,
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DRAW_FRAMEBUFFER = GL_DRAW_FRAMEBUFFER_EXT,
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READ_DRAW_FRAMEBUFFER = GL_FRAMEBUFFER_EXT
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};
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/** Bind the FBO as either the read or draw target, or both. */
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void apply(State &state, BindTarget target) const;
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/** Mark internal FBO for deletion.
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* Deletion requests are queued until they can be executed
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* in the proper GL context. */
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static void deleteFrameBufferObject(unsigned int contextID, GLuint program);
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/** flush all the cached FBOs which need to be deleted
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* in the OpenGL context related to contextID.*/
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static void flushDeletedFrameBufferObjects(unsigned int contextID,double currentTime, double& availableTime);
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/** discard all the cached FBOs which need to be deleted
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* in the OpenGL context related to contextID.*/
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static void discardDeletedFrameBufferObjects(unsigned int contextID);
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protected:
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virtual ~FrameBufferObject();
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FrameBufferObject& operator = (const FrameBufferObject&) { return *this; }
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void updateDrawBuffers();
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inline void dirtyAll();
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GLenum convertBufferComponentToGLenum(BufferComponent attachment_point) const;
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private:
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AttachmentMap _attachments;
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// Buffers passed to glDrawBuffers when using multiple render targets.
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MultipleRenderingTargets _drawBuffers;
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mutable buffered_value<int> _dirtyAttachmentList;
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mutable buffered_value<int> _unsupported;
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|
mutable buffered_value<GLuint> _fboID;
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|
|
|
};
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|
|
|
// INLINE METHODS
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|
|
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inline const FrameBufferObject::AttachmentMap &FrameBufferObject::getAttachmentMap() const
|
|
{
|
|
return _attachments;
|
|
}
|
|
|
|
inline bool FrameBufferObject::hasAttachment(FrameBufferObject::BufferComponent attachment_point) const
|
|
{
|
|
return _attachments.find(attachment_point) != _attachments.end();
|
|
}
|
|
|
|
inline const FrameBufferAttachment &FrameBufferObject::getAttachment(FrameBufferObject::BufferComponent attachment_point) const
|
|
{
|
|
return _attachments.find(attachment_point)->second;
|
|
}
|
|
|
|
inline void FrameBufferObject::dirtyAll()
|
|
{
|
|
_dirtyAttachmentList.setAllElementsTo(1);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
#endif
|
|
|