From f37383c1c6a9cf83c556f2131fab1adef0efc17e Mon Sep 17 00:00:00 2001 From: Daniel Borca Date: Fri, 12 Nov 2004 10:11:04 +0000 Subject: wip hack for EXT_stencil_two_side --- src/mesa/tnl_dd/t_dd_tritmp.h | 79 +++++++++++++++++++++++++++++++++++++------ 1 file changed, 69 insertions(+), 10 deletions(-) (limited to 'src/mesa/tnl_dd') diff --git a/src/mesa/tnl_dd/t_dd_tritmp.h b/src/mesa/tnl_dd/t_dd_tritmp.h index b26347b77e..055ee559a0 100644 --- a/src/mesa/tnl_dd/t_dd_tritmp.h +++ b/src/mesa/tnl_dd/t_dd_tritmp.h @@ -41,6 +41,7 @@ * DO_FLAT: For hardware without native flatshading, copy provoking colors * into the other vertices. Restore after rendering. * DO_UNFILLED: Decompose triangles to lines and points where appropriate. + * DO_TWOSTENCIL:Gross hack for two-sided stencil. * * HAVE_RGBA: Vertices have rgba values (otherwise index values). * HAVE_SPEC: Vertices have secondary rgba values. @@ -107,6 +108,20 @@ #define VERT_Z_ADD(v,val) VERT_Z(v) += val #endif +/* disable twostencil for un-aware drivers */ +#ifndef HAVE_STENCIL_TWOSIDE +#define HAVE_STENCIL_TWOSIDE 0 +#endif +#ifndef DO_TWOSTENCIL +#define DO_TWOSTENCIL 0 +#endif +#ifndef SETUP_STENCIL +#define SETUP_STENCIL(f) +#endif +#ifndef UNSET_STENCIL +#define UNSET_STENCIL(f) +#endif + #if DO_TRI static void TAG(triangle)( GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) { @@ -124,7 +139,7 @@ static void TAG(triangle)( GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) v[1] = (VERTEX *)GET_VERTEX(e1); v[2] = (VERTEX *)GET_VERTEX(e2); - if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED) + if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED || DO_TWOSTENCIL) { GLfloat ex = VERT_X(v[0]) - VERT_X(v[2]); GLfloat ey = VERT_Y(v[0]) - VERT_Y(v[2]); @@ -132,10 +147,14 @@ static void TAG(triangle)( GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) GLfloat fy = VERT_Y(v[1]) - VERT_Y(v[2]); GLfloat cc = ex*fy - ey*fx; - if (DO_TWOSIDE || DO_UNFILLED) + if (DO_TWOSIDE || DO_UNFILLED || DO_TWOSTENCIL) { facing = AREA_IS_CCW( cc ) ^ ctx->Polygon._FrontBit; + if (DO_TWOSTENCIL && ctx->Stencil.TestTwoSide) { + ctx->_Facing = facing; /* mixed mode rendering: for 2-sided stencil test */ + } + if (DO_UNFILLED) { if (facing) { mode = ctx->Polygon.BackMode; @@ -267,14 +286,26 @@ static void TAG(triangle)( GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) VERT_Z_ADD(v[1], offset); VERT_Z_ADD(v[2], offset); } - UNFILLED_TRI( ctx, GL_POINT, e0, e1, e2 ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + UNFILLED_TRI( ctx, GL_POINT, e0, e1, e2 ); + UNSET_STENCIL(facing); + } else { + UNFILLED_TRI( ctx, GL_POINT, e0, e1, e2 ); + } } else if (mode == GL_LINE) { if (DO_OFFSET && ctx->Polygon.OffsetLine) { VERT_Z_ADD(v[0], offset); VERT_Z_ADD(v[1], offset); VERT_Z_ADD(v[2], offset); } - UNFILLED_TRI( ctx, GL_LINE, e0, e1, e2 ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + UNFILLED_TRI( ctx, GL_LINE, e0, e1, e2 ); + UNSET_STENCIL(facing); + } else { + UNFILLED_TRI( ctx, GL_LINE, e0, e1, e2 ); + } } else { if (DO_OFFSET && ctx->Polygon.OffsetFill) { VERT_Z_ADD(v[0], offset); @@ -283,7 +314,13 @@ static void TAG(triangle)( GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) } if (DO_UNFILLED) RASTERIZE( GL_TRIANGLES ); - TRI( v[0], v[1], v[2] ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + TRI( v[0], v[1], v[2] ); + UNSET_STENCIL(facing); + } else { + TRI( v[0], v[1], v[2] ); + } } if (DO_OFFSET) @@ -354,7 +391,7 @@ static void TAG(quad)( GLcontext *ctx, v[2] = (VERTEX *)GET_VERTEX(e2); v[3] = (VERTEX *)GET_VERTEX(e3); - if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED) + if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED || DO_TWOSTENCIL) { GLfloat ex = VERT_X(v[2]) - VERT_X(v[0]); GLfloat ey = VERT_Y(v[2]) - VERT_Y(v[0]); @@ -362,10 +399,14 @@ static void TAG(quad)( GLcontext *ctx, GLfloat fy = VERT_Y(v[3]) - VERT_Y(v[1]); GLfloat cc = ex*fy - ey*fx; - if (DO_TWOSIDE || DO_UNFILLED) + if (DO_TWOSIDE || DO_UNFILLED || DO_TWOSTENCIL) { facing = AREA_IS_CCW( cc ) ^ ctx->Polygon._FrontBit; + if (DO_TWOSTENCIL && ctx->Stencil.TestTwoSide) { + ctx->_Facing = facing; /* mixed mode rendering: for 2-sided stencil test */ + } + if (DO_UNFILLED) { if (facing) { mode = ctx->Polygon.BackMode; @@ -515,7 +556,13 @@ static void TAG(quad)( GLcontext *ctx, VERT_Z_ADD(v[2], offset); VERT_Z_ADD(v[3], offset); } - UNFILLED_QUAD( ctx, GL_POINT, e0, e1, e2, e3 ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + UNFILLED_QUAD( ctx, GL_POINT, e0, e1, e2, e3 ); + UNSET_STENCIL(facing); + } else { + UNFILLED_QUAD( ctx, GL_POINT, e0, e1, e2, e3 ); + } } else if (mode == GL_LINE) { if (DO_OFFSET && ctx->Polygon.OffsetLine) { VERT_Z_ADD(v[0], offset); @@ -523,7 +570,13 @@ static void TAG(quad)( GLcontext *ctx, VERT_Z_ADD(v[2], offset); VERT_Z_ADD(v[3], offset); } - UNFILLED_QUAD( ctx, GL_LINE, e0, e1, e2, e3 ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + UNFILLED_QUAD( ctx, GL_LINE, e0, e1, e2, e3 ); + UNSET_STENCIL(facing); + } else { + UNFILLED_QUAD( ctx, GL_LINE, e0, e1, e2, e3 ); + } } else { if (DO_OFFSET && ctx->Polygon.OffsetFill) { VERT_Z_ADD(v[0], offset); @@ -532,7 +585,13 @@ static void TAG(quad)( GLcontext *ctx, VERT_Z_ADD(v[3], offset); } RASTERIZE( GL_TRIANGLES ); - QUAD( (v[0]), (v[1]), (v[2]), (v[3]) ); + if (DO_TWOSTENCIL && !HAVE_STENCIL_TWOSIDE && ctx->Stencil.TestTwoSide) { + SETUP_STENCIL(facing); + QUAD( (v[0]), (v[1]), (v[2]), (v[3]) ); + UNSET_STENCIL(facing); + } else { + QUAD( (v[0]), (v[1]), (v[2]), (v[3]) ); + } } if (DO_OFFSET) -- cgit v1.2.3