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-rw-r--r--src/mesa/tnl_dd/t_dd_tritmp.h79
1 files changed, 69 insertions, 10 deletions
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)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 10:34:26 +0000