diff options
| author | Ian Romanick <idr@freedesktop.org> | 2009-01-09 15:43:17 -0800 |
|---|---|---|
| committer | Ian Romanick <ian.d.romanick@intel.com> | 2009-01-23 09:49:29 -0800 |
| commit | dde7cb962860e72e1bf3175069767358cc5b3f3c (patch) | |
| tree | 64ca81d4f544ae7f28618c919af58a844f246de9 /src/mesa/main/mtypes.h | |
| parent | af0e6336e9d7dc19d74950ce13b33e1fa1b2081d (diff) | |
Track two sets of back-face stencil state
Track separate back-face stencil state for OpenGL 2.0 /
GL_ATI_separate_stencil and GL_EXT_stencil_two_side. This allows all
three to be enabled in a driver. One set of state is set via the 2.0
or ATI functions and is used when STENCIL_TEST_TWO_SIDE_EXT is
disabled. The other is set by StencilFunc and StencilOp when the
active stencil face is set to BACK. The GL_EXT_stencil_two_side spec has
more details.
http://opengl.org/registry/specs/EXT/stencil_two_side.txt
Diffstat (limited to 'src/mesa/main/mtypes.h')
| -rw-r--r-- | src/mesa/main/mtypes.h | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index f1da638ae6..088d45b156 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1108,20 +1108,34 @@ struct gl_scissor_attrib /** * Stencil attribute group (GL_STENCIL_BUFFER_BIT). + * + * Three sets of stencil data are tracked so that OpenGL 2.0, + * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported + * simultaneously. In each of the stencil state arrays, element 0 corresponds + * to GL_FRONT. Element 1 corresponds to the OpenGL 2.0 / + * GL_ATI_separate_stencil GL_BACK state. Element 2 corresponds to the + * GL_EXT_stencil_two_side GL_BACK state. + * + * The derived value \c _BackFace is either 1 or 2 depending on whether or + * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled. + * + * The derived value \c _TestTwoSide is set when the front-face and back-face + * stencil state are different. */ struct gl_stencil_attrib { GLboolean Enabled; /**< Enabled flag */ GLboolean TestTwoSide; /**< GL_EXT_stencil_two_side */ - GLubyte ActiveFace; /**< GL_EXT_stencil_two_side (0 or 1) */ + GLubyte ActiveFace; /**< GL_EXT_stencil_two_side (0 or 2) */ GLboolean _TestTwoSide; - GLenum Function[2]; /**< Stencil function */ - GLenum FailFunc[2]; /**< Fail function */ - GLenum ZPassFunc[2]; /**< Depth buffer pass function */ - GLenum ZFailFunc[2]; /**< Depth buffer fail function */ - GLint Ref[2]; /**< Reference value */ - GLuint ValueMask[2]; /**< Value mask */ - GLuint WriteMask[2]; /**< Write mask */ + GLubyte _BackFace; + GLenum Function[3]; /**< Stencil function */ + GLenum FailFunc[3]; /**< Fail function */ + GLenum ZPassFunc[3]; /**< Depth buffer pass function */ + GLenum ZFailFunc[3]; /**< Depth buffer fail function */ + GLint Ref[3]; /**< Reference value */ + GLuint ValueMask[3]; /**< Value mask */ + GLuint WriteMask[3]; /**< Write mask */ GLuint Clear; /**< Clear value */ }; |