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wip hack for EXT_stencil_two_side

This commit is contained in:
Daniel Borca 2004-11-12 10:11:04 +00:00
parent 79a98dea91
commit f37383c1c6
1 changed files with 69 additions and 10 deletions
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79
src/mesa/tnl_dd/t_dd_tritmp.h
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@ -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)