-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.3
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* 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.
* VERT_X(v): Alias for vertex x value.
* VERT_Y(v): Alias for vertex y value.
* VERT_Z(v): Alias for vertex z value.
- * DEPTH_SCALE: Scale for offset.
+ * DEPTH_SCALE: Scale for constant offset.
+ * REVERSE_DEPTH: Viewport depth range reversed.
*
* VERTEX: Hardware vertex type.
* GET_VERTEX(n): Retreive vertex with index n.
#define VERT_Z_ADD(v,val) VERT_Z(v) += val
#endif
+#ifndef REVERSE_DEPTH
+#define REVERSE_DEPTH 0
+#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 )
{
struct vertex_buffer *VB = &TNL_CONTEXT( ctx )->vb;
VERTEX *v[3];
- GLfloat offset;
+ GLfloat offset = 0;
GLfloat z[3];
GLenum mode = GL_FILL;
- GLuint facing;
+ GLuint facing = 0;
LOCAL_VARS(3);
/* fprintf(stderr, "%s\n", __FUNCTION__); */
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]);
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;
}
else {
GLfloat (*vbcolor)[4] = VB->ColorPtr[1]->data;
- ASSERT(VB->ColorPtr[1]->stride == 4*sizeof(GLfloat));
(void) vbcolor;
if (!DO_FLAT) {
VERT_SAVE_RGBA( 0 );
VERT_SAVE_RGBA( 1 );
- VERT_SET_RGBA( v[0], vbcolor[e0] );
- VERT_SET_RGBA( v[1], vbcolor[e1] );
}
VERT_SAVE_RGBA( 2 );
- VERT_SET_RGBA( v[2], vbcolor[e2] );
+
+ if (VB->ColorPtr[1]->stride) {
+ ASSERT(VB->ColorPtr[1]->stride == 4*sizeof(GLfloat));
+
+ if (!DO_FLAT) {
+ VERT_SET_RGBA( v[0], vbcolor[e0] );
+ VERT_SET_RGBA( v[1], vbcolor[e1] );
+ }
+ VERT_SET_RGBA( v[2], vbcolor[e2] );
+ }
+ else {
+ if (!DO_FLAT) {
+ VERT_SET_RGBA( v[0], vbcolor[0] );
+ VERT_SET_RGBA( v[1], vbcolor[0] );
+ }
+ VERT_SET_RGBA( v[2], vbcolor[0] );
+ }
if (HAVE_SPEC && VB->SecondaryColorPtr[1]) {
GLfloat (*vbspec)[4] = VB->SecondaryColorPtr[1]->data;
+ ASSERT(VB->SecondaryColorPtr[1]->stride == 4*sizeof(GLfloat));
if (!DO_FLAT) {
VERT_SAVE_SPEC( 0 );
if ( bc < 0.0f ) bc = -bc;
offset += MAX2( ac, bc ) * ctx->Polygon.OffsetFactor;
}
- offset *= ctx->MRD;
+ offset *= ctx->DrawBuffer->_MRD * (REVERSE_DEPTH ? -1.0 : 1.0);
}
}
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);
}
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)
{
struct vertex_buffer *VB = &TNL_CONTEXT( ctx )->vb;
VERTEX *v[4];
- GLfloat offset;
+ GLfloat offset = 0;
GLfloat z[4];
GLenum mode = GL_FILL;
- GLuint facing;
+ GLuint facing = 0;
LOCAL_VARS(4);
v[0] = (VERTEX *)GET_VERTEX(e0);
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]);
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;
VERT_SAVE_RGBA( 0 );
VERT_SAVE_RGBA( 1 );
VERT_SAVE_RGBA( 2 );
- VERT_SET_RGBA( v[0], vbcolor[e0] );
- VERT_SET_RGBA( v[1], vbcolor[e1] );
- VERT_SET_RGBA( v[2], vbcolor[e2] );
- }
+ }
VERT_SAVE_RGBA( 3 );
- VERT_SET_RGBA( v[3], vbcolor[e3] );
+
+ if (VB->ColorPtr[1]->stride) {
+ if (!DO_FLAT) {
+ VERT_SET_RGBA( v[0], vbcolor[e0] );
+ VERT_SET_RGBA( v[1], vbcolor[e1] );
+ VERT_SET_RGBA( v[2], vbcolor[e2] );
+ }
+ VERT_SET_RGBA( v[3], vbcolor[e3] );
+ }
+ else {
+ if (!DO_FLAT) {
+ VERT_SET_RGBA( v[0], vbcolor[0] );
+ VERT_SET_RGBA( v[1], vbcolor[0] );
+ VERT_SET_RGBA( v[2], vbcolor[0] );
+ }
+ VERT_SET_RGBA( v[3], vbcolor[0] );
+ }
if (HAVE_SPEC && VB->SecondaryColorPtr[1]) {
GLfloat (*vbspec)[4] = VB->SecondaryColorPtr[1]->data;
if ( bc < 0.0f ) bc = -bc;
offset += MAX2( ac, bc ) * ctx->Polygon.OffsetFactor;
}
- offset *= ctx->MRD;
+ offset *= ctx->DrawBuffer->_MRD * (REVERSE_DEPTH ? -1.0 : 1.0);
}
}
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);
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);
VERT_Z_ADD(v[2], offset);
VERT_Z_ADD(v[3], offset);
}
- RASTERIZE( GL_TRIANGLES );
- QUAD( (v[0]), (v[1]), (v[2]), (v[3]) );
+ RASTERIZE( GL_QUADS );
+ 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)
static void TAG(points)( GLcontext *ctx, GLuint first, GLuint last )
{
struct vertex_buffer *VB = &TNL_CONTEXT( ctx )->vb;
- int i;
+ GLuint i;
LOCAL_VARS(1);
if (VB->Elts == 0) {
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