svn merge ^/branches/released . --username marha

1 files changed, 266 insertions, 0 deletions

diff --git a/mesalib/src/mesa/swrast_setup/ss_tritmp.h b/mesalib/src/mesa/swrast_setup/ss_tritmp.h
new file mode 100644
index 000000000..724b5e94f
--- /dev/null
+++ b/mesalib/src/mesa/swrast_setup/ss_tritmp.h
@@ -0,0 +1,266 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2007  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"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+/**
+ * This is where we handle assigning vertex colors based on front/back
+ * facing, compute polygon offset and handle glPolygonMode().
+ */
+static void TAG(triangle)(GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
+   SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
+   SWvertex *v[3];
+   GLfloat z[3];
+   GLfloat offset, oz0, oz1, oz2;
+   GLenum mode = GL_FILL;
+   GLuint facing = 0;
+   GLchan saved_color[3][4];
+   GLfloat saved_col0[3][4];
+   GLfloat saved_spec[3][4];
+   GLfloat saved_index[3];
+
+   v[0] = &verts[e0];
+   v[1] = &verts[e1];
+   v[2] = &verts[e2];
+
+   if (IND & (SS_TWOSIDE_BIT | SS_OFFSET_BIT | SS_UNFILLED_BIT))
+   {
+      GLfloat ex = v[0]->attrib[FRAG_ATTRIB_WPOS][0] - v[2]->attrib[FRAG_ATTRIB_WPOS][0];
+      GLfloat ey = v[0]->attrib[FRAG_ATTRIB_WPOS][1] - v[2]->attrib[FRAG_ATTRIB_WPOS][1];
+      GLfloat fx = v[1]->attrib[FRAG_ATTRIB_WPOS][0] - v[2]->attrib[FRAG_ATTRIB_WPOS][0];
+      GLfloat fy = v[1]->attrib[FRAG_ATTRIB_WPOS][1] - v[2]->attrib[FRAG_ATTRIB_WPOS][1];
+      GLfloat cc  = ex*fy - ey*fx;
+
+      if (IND & (SS_TWOSIDE_BIT | SS_UNFILLED_BIT))
+      {
+	 facing = (cc < 0.0) ^ ctx->Polygon._FrontBit;
+
+	 if (IND & SS_UNFILLED_BIT)
+	    mode = facing ? ctx->Polygon.BackMode : ctx->Polygon.FrontMode;
+
+	 if (facing == 1) {
+	    if (IND & SS_TWOSIDE_BIT) {
+	       if (IND & SS_RGBA_BIT) {
+                  if (VB->ColorPtr[1]) {
+                     GLfloat (*vbcolor)[4] = VB->ColorPtr[1]->data;
+
+                     if (swsetup->intColors) {
+                        COPY_CHAN4(saved_color[0], v[0]->color);
+                        COPY_CHAN4(saved_color[1], v[1]->color);
+                        COPY_CHAN4(saved_color[2], v[2]->color);
+                     }
+                     else {
+                        COPY_4V(saved_col0[0], v[0]->attrib[FRAG_ATTRIB_COL0]);
+                        COPY_4V(saved_col0[1], v[1]->attrib[FRAG_ATTRIB_COL0]);
+                        COPY_4V(saved_col0[2], v[2]->attrib[FRAG_ATTRIB_COL0]);
+                     }
+
+                     if (VB->ColorPtr[1]->stride) {
+                        if (swsetup->intColors) {
+                           SS_COLOR(v[0]->color, vbcolor[e0]);
+                           SS_COLOR(v[1]->color, vbcolor[e1]);
+                           SS_COLOR(v[2]->color, vbcolor[e2]);
+                        }
+                        else {
+                           COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], vbcolor[e0]);
+                           COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], vbcolor[e1]);
+                           COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], vbcolor[e2]);
+                        }
+                     }
+                     else {
+                        /* flat shade */
+                        if (swsetup->intColors) {
+                           SS_COLOR(v[0]->color, vbcolor[0]);
+                           SS_COLOR(v[1]->color, vbcolor[0]);
+                           SS_COLOR(v[2]->color, vbcolor[0]);
+                        }
+                        else {
+                           COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
+                           COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
+                           COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
+                        }
+                     }
+                  }
+
+		  if (VB->SecondaryColorPtr[1]) {
+		     GLfloat (*vbspec)[4] = VB->SecondaryColorPtr[1]->data;
+
+		     COPY_4V(saved_spec[0], v[0]->attrib[FRAG_ATTRIB_COL1]);
+		     COPY_4V(saved_spec[1], v[1]->attrib[FRAG_ATTRIB_COL1]);
+		     COPY_4V(saved_spec[2], v[2]->attrib[FRAG_ATTRIB_COL1]);
+
+		     if (VB->SecondaryColorPtr[1]->stride) {
+			SS_SPEC(v[0]->attrib[FRAG_ATTRIB_COL1], vbspec[e0]);
+			SS_SPEC(v[1]->attrib[FRAG_ATTRIB_COL1], vbspec[e1]);
+			SS_SPEC(v[2]->attrib[FRAG_ATTRIB_COL1], vbspec[e2]);
+		     }
+		     else {
+			SS_SPEC(v[0]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
+			SS_SPEC(v[1]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
+			SS_SPEC(v[2]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
+		     }
+		  }
+	       } else {
+		  GLfloat *vbindex = (GLfloat *)VB->IndexPtr[1]->data;
+		  saved_index[0] = v[0]->attrib[FRAG_ATTRIB_CI][0];
+		  saved_index[1] = v[1]->attrib[FRAG_ATTRIB_CI][0];
+		  saved_index[2] = v[2]->attrib[FRAG_ATTRIB_CI][0];
+		  
+		  SS_IND(v[0]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e0]);
+		  SS_IND(v[1]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e1]);
+		  SS_IND(v[2]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e2]);
+	       }
+	    }
+	 }
+      }
+
+      if (IND & SS_OFFSET_BIT) {
+         const GLfloat max = ctx->DrawBuffer->_DepthMaxF;
+         /* save original Z values (restored later) */
+	 z[0] = v[0]->attrib[FRAG_ATTRIB_WPOS][2];
+	 z[1] = v[1]->attrib[FRAG_ATTRIB_WPOS][2];
+	 z[2] = v[2]->attrib[FRAG_ATTRIB_WPOS][2];
+         /* Note that Z values are already scaled to [0,65535] (for example)
+          * so no MRD value is used here.
+          */
+	 offset = ctx->Polygon.OffsetUnits;
+	 if (cc * cc > 1e-16) {
+	    const GLfloat ez = z[0] - z[2];
+	    const GLfloat fz = z[1] - z[2];
+	    const GLfloat oneOverArea = 1.0F / cc;
+	    const GLfloat dzdx = FABSF((ey * fz - ez * fy) * oneOverArea);
+	    const GLfloat dzdy = FABSF((ez * fx - ex * fz) * oneOverArea);
+	    offset += MAX2(dzdx, dzdy) * ctx->Polygon.OffsetFactor;
+	 }
+         /* new Z values */
+         oz0 = CLAMP(v[0]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
+         oz1 = CLAMP(v[1]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
+         oz2 = CLAMP(v[2]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
+      }
+   }
+
+   if (mode == GL_POINT) {
+      if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetPoint) {
+	 v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
+	 v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
+	 v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
+      }
+      _swsetup_render_tri(ctx, e0, e1, e2, facing, _swsetup_edge_render_point_tri);
+   } else if (mode == GL_LINE) {
+      if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetLine) {
+	 v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
+	 v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
+	 v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
+      }
+      _swsetup_render_tri(ctx, e0, e1, e2, facing, _swsetup_edge_render_line_tri);
+   } else {
+      if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetFill) {
+	 v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
+	 v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
+	 v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
+      }
+      _swrast_Triangle( ctx, v[0], v[1], v[2] );
+   }
+
+   /*
+    * Restore original vertex colors, etc.
+    */
+   if (IND & SS_OFFSET_BIT) {
+      v[0]->attrib[FRAG_ATTRIB_WPOS][2] = z[0];
+      v[1]->attrib[FRAG_ATTRIB_WPOS][2] = z[1];
+      v[2]->attrib[FRAG_ATTRIB_WPOS][2] = z[2];
+   }
+
+   if (IND & SS_TWOSIDE_BIT) {
+      if (facing == 1) {
+	 if (IND & SS_RGBA_BIT) {
+            if (VB->ColorPtr[1]) {
+               if (swsetup->intColors) {
+                  COPY_CHAN4(v[0]->color, saved_color[0]);
+                  COPY_CHAN4(v[1]->color, saved_color[1]);
+                  COPY_CHAN4(v[2]->color, saved_color[2]);
+               }
+               else {
+                  COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], saved_col0[0]);
+                  COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], saved_col0[1]);
+                  COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], saved_col0[2]);
+               }
+            }
+
+	    if (VB->SecondaryColorPtr[1]) {
+	       COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL1], saved_spec[0]);
+	       COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL1], saved_spec[1]);
+	       COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL1], saved_spec[2]);
+	    }
+	 } else {
+	    v[0]->attrib[FRAG_ATTRIB_CI][0] = saved_index[0];
+	    v[1]->attrib[FRAG_ATTRIB_CI][0] = saved_index[1];
+	    v[2]->attrib[FRAG_ATTRIB_CI][0] = saved_index[2];
+	 }
+      }
+   }
+}
+
+
+
+/* Need to fixup edgeflags when decomposing to triangles:
+ */
+static void TAG(quadfunc)( GLcontext *ctx, GLuint v0,
+		       GLuint v1, GLuint v2, GLuint v3 )
+{
+   if (IND & SS_UNFILLED_BIT) {
+      struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+      if (VB->EdgeFlag) { /* XXX this test shouldn't be needed (bug 12614) */
+         GLubyte ef1 = VB->EdgeFlag[v1];
+         GLubyte ef3 = VB->EdgeFlag[v3];
+         VB->EdgeFlag[v1] = 0;
+         TAG(triangle)( ctx, v0, v1, v3 );
+         VB->EdgeFlag[v1] = ef1;
+         VB->EdgeFlag[v3] = 0;
+         TAG(triangle)( ctx, v1, v2, v3 );
+         VB->EdgeFlag[v3] = ef3;
+      }
+   } else {
+      TAG(triangle)( ctx, v0, v1, v3 );
+      TAG(triangle)( ctx, v1, v2, v3 );
+   }
+}
+
+
+
+
+static void TAG(init)( void )
+{
+   tri_tab[IND] = TAG(triangle);
+   quad_tab[IND] = TAG(quadfunc);
+}
+
+
+#undef IND
+#undef TAG