-/* $Id: t_vb_cliptmp.h,v 1.7 2001/01/17 02:49:39 keithw Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ *
+ * Copyright (C) 1999-2001 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
* 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.
*
- * Author:
- * Keith Whitwell <keithw@valinux.com>
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
*/
GLfloat dpPrev = CLIP_DOTPROD(idxPrev, A, B, C, D ); \
GLuint outcount = 0; \
GLuint i; \
- \
+ \
inlist[n] = inlist[0]; /* prevent rotation of vertices */ \
for (i = 1; i <= n; i++) { \
GLuint idx = inlist[i]; \
GLfloat dp = CLIP_DOTPROD(idx, A, B, C, D ); \
\
clipmask[idxPrev] |= PLANE; \
- if (!NEGATIVE(dpPrev)) { \
+ if (!IS_NEGATIVE(dpPrev)) { \
outlist[outcount++] = idxPrev; \
clipmask[idxPrev] &= ~PLANE; \
} \
GLuint newvert = VB->LastClipped++; \
VB->ClipMask[newvert] = 0; \
outlist[outcount++] = newvert; \
- if (NEGATIVE(dp)) { \
+ if (IS_NEGATIVE(dp)) { \
/* Going out of bounds. Avoid division by zero as we \
* know dp != dpPrev from DIFFERENT_SIGNS, above. \
*/ \
GLfloat t = dp / (dp - dpPrev); \
- LINTERP_SZ( t, coord, newvert, idx, idxPrev, SIZE ); \
+ INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \
interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \
- } else { \
+ } else { \
/* Coming back in. \
*/ \
GLfloat t = dpPrev / (dpPrev - dp); \
- LINTERP_SZ( t, coord, newvert, idxPrev, idx, SIZE ); \
+ INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \
interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \
} \
} \
} while (0)
-#define LINE_CLIP(PLANE, A, B, C, D ) \
-do { \
- if (mask & PLANE) { \
- GLfloat dpI = CLIP_DOTPROD( ii, A, B, C, D ); \
- GLfloat dpJ = CLIP_DOTPROD( jj, A, B, C, D ); \
- \
- if (DIFFERENT_SIGNS(dpI, dpJ)) { \
- GLuint newvert = VB->LastClipped++; \
- VB->ClipMask[newvert] = 0; \
- if (NEGATIVE(dpJ)) { \
- GLfloat t = dpI / (dpI - dpJ); \
- VB->ClipMask[jj] |= PLANE; \
- LINTERP_SZ( t, coord, newvert, ii, jj, SIZE ); \
- interp( ctx, t, newvert, ii, jj, GL_FALSE ); \
- jj = newvert; \
- } else { \
- GLfloat t = dpJ / (dpJ - dpI); \
- VB->ClipMask[ii] |= PLANE; \
- LINTERP_SZ( t, coord, newvert, jj, ii, SIZE ); \
- interp( ctx, t, newvert, jj, ii, GL_FALSE ); \
- ii = newvert; \
- } \
- } \
- else if (NEGATIVE(dpI)) \
- return; \
- } \
+#define LINE_CLIP(PLANE, A, B, C, D ) \
+do { \
+ if (mask & PLANE) { \
+ GLfloat dpI = CLIP_DOTPROD( ii, A, B, C, D ); \
+ GLfloat dpJ = CLIP_DOTPROD( jj, A, B, C, D ); \
+ \
+ if (DIFFERENT_SIGNS(dpI, dpJ)) { \
+ GLuint newvert = VB->LastClipped++; \
+ VB->ClipMask[newvert] = 0; \
+ if (IS_NEGATIVE(dpJ)) { \
+ GLfloat t = dpI / (dpI - dpJ); \
+ VB->ClipMask[jj] |= PLANE; \
+ INTERP_4F( t, coord[newvert], coord[ii], coord[jj] ); \
+ interp( ctx, t, newvert, ii, jj, GL_FALSE ); \
+ jj = newvert; \
+ } else { \
+ GLfloat t = dpJ / (dpJ - dpI); \
+ VB->ClipMask[ii] |= PLANE; \
+ INTERP_4F( t, coord[newvert], coord[jj], coord[ii] ); \
+ interp( ctx, t, newvert, jj, ii, GL_FALSE ); \
+ ii = newvert; \
+ } \
+ } \
+ else if (IS_NEGATIVE(dpI)) \
+ return; \
+ } \
} while (0)
-static void TAG(build_proj_verts)( GLcontext *ctx )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
-
- /* Project if necessary.
- */
- if (VB->ProjectedClipPtr) {
- GLfloat (*coord)[4] = VB->ClipPtr->data;
- GLfloat (*proj)[4] = VB->ProjectedClipPtr->data;
- GLuint last = VB->LastClipped;
- GLuint i;
-
- for (i = VB->FirstClipped; i < last; i++) {
- if (VB->ClipMask[i] == 0) {
- if (SIZE == 4 && W(i) != 0.0F) {
- GLfloat wInv = 1.0F / W(i);
- proj[i][0] = X(i) * wInv;
- proj[i][1] = Y(i) * wInv;
- proj[i][2] = Z(i) * wInv;
- proj[i][3] = wInv;
- } else {
- proj[i][0] = X(i);
- proj[i][1] = Y(i);
- proj[i][2] = Z(i);
- proj[i][3] = W(i);
- }
- }
- }
- }
-
- ctx->Driver.BuildProjectedVertices(ctx,
- VB->FirstClipped,
- VB->LastClipped,
- ~0);
-}
/* Clip a line against the viewport and user clip planes.
*/
-static void TAG(clip_line)( GLcontext *ctx,
- GLuint i, GLuint j,
- GLubyte mask )
+static INLINE void
+TAG(clip_line)( GLcontext *ctx, GLuint i, GLuint j, GLubyte mask )
{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- interp_func interp = (interp_func) VB->interpfunc;
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ tnl_interp_func interp = tnl->Driver.Render.Interp;
GLfloat (*coord)[4] = VB->ClipPtr->data;
GLuint ii = i, jj = j, p;
- VB->LastClipped = VB->FirstClipped;
+ VB->LastClipped = VB->Count;
if (mask & 0x3f) {
LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
if (mask & CLIP_USER_BIT) {
for (p=0;p<MAX_CLIP_PLANES;p++) {
- if (ctx->Transform.ClipEnabled[p]) {
- GLfloat a = ctx->Transform._ClipUserPlane[p][0];
- GLfloat b = ctx->Transform._ClipUserPlane[p][1];
- GLfloat c = ctx->Transform._ClipUserPlane[p][2];
- GLfloat d = ctx->Transform._ClipUserPlane[p][3];
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
+ const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
+ const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
+ const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
LINE_CLIP( CLIP_USER_BIT, a, b, c, d );
}
}
}
if ((ctx->_TriangleCaps & DD_FLATSHADE) && j != jj)
- VB->copypvfunc( ctx, jj, j );
-
- TAG(build_proj_verts)( ctx );
-
- /* Render the new line.
- */
- ctx->Driver.LineFunc( ctx, ii, jj );
+ tnl->Driver.Render.CopyPV( ctx, jj, j );
+ tnl->Driver.Render.ClippedLine( ctx, ii, jj );
}
-/* Clip a triangle or quad against the viewport and user clip planes.
+/* Clip a triangle against the viewport and user clip planes.
*/
-static void TAG(clip_polygon)( GLcontext *ctx,
- GLuint n, GLuint vlist[],
- GLubyte mask )
+static INLINE void
+TAG(clip_tri)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- interp_func interp = (interp_func) VB->interpfunc;
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ tnl_interp_func interp = tnl->Driver.Render.Interp;
GLfloat (*coord)[4] = VB->ClipPtr->data;
- GLuint pv = vlist[0];
- GLuint vlist2[MAX_CLIPPED_VERTICES];
- GLuint *inlist = vlist, *outlist = vlist2;
+ GLuint pv = v2;
+ GLuint vlist[2][MAX_CLIPPED_VERTICES];
+ GLuint *inlist = vlist[0], *outlist = vlist[1];
GLuint p;
GLubyte *clipmask = VB->ClipMask;
+ GLuint n = 3;
- VB->LastClipped = VB->FirstClipped;
+ ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */
+
+ VB->LastClipped = VB->Count;
if (mask & 0x3f) {
POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
if (mask & CLIP_USER_BIT) {
for (p=0;p<MAX_CLIP_PLANES;p++) {
- if (ctx->Transform.ClipEnabled[p]) {
- GLfloat a = ctx->Transform._ClipUserPlane[p][0];
- GLfloat b = ctx->Transform._ClipUserPlane[p][1];
- GLfloat c = ctx->Transform._ClipUserPlane[p][2];
- GLfloat d = ctx->Transform._ClipUserPlane[p][3];
- POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
- }
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
+ const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
+ const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
+ const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
+ POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
+ }
}
}
if (ctx->_TriangleCaps & DD_FLATSHADE) {
if (pv != inlist[0]) {
- ASSERT( inlist[0] >= VB->FirstClipped );
- VB->copypvfunc( ctx, inlist[0], pv );
+ ASSERT( inlist[0] >= VB->Count );
+ tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
}
}
- TAG(build_proj_verts)( ctx );
-
- /* Render the new vertices as an unclipped polygon.
- */
- {
- GLuint *tmp = VB->Elts;
- VB->Elts = inlist;
- ctx->Driver.RenderTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
- VB->Elts = tmp;
- }
+ tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
}
+/* Clip a quad against the viewport and user clip planes.
+ */
+static INLINE void
+TAG(clip_quad)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3,
+ GLubyte mask )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ tnl_interp_func interp = tnl->Driver.Render.Interp;
+ GLfloat (*coord)[4] = VB->ClipPtr->data;
+ GLuint pv = v3;
+ GLuint vlist[2][MAX_CLIPPED_VERTICES];
+ GLuint *inlist = vlist[0], *outlist = vlist[1];
+ GLuint p;
+ GLubyte *clipmask = VB->ClipMask;
+ GLuint n = 4;
+
+ ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */
+
+ VB->LastClipped = VB->Count;
+ if (mask & 0x3f) {
+ POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
+ POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
+ POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
+ POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
+ POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
+ POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
+ }
+ if (mask & CLIP_USER_BIT) {
+ for (p=0;p<MAX_CLIP_PLANES;p++) {
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
+ const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
+ const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
+ const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
+ POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
+ }
+ }
+ }
+
+ if (ctx->_TriangleCaps & DD_FLATSHADE) {
+ if (pv != inlist[0]) {
+ ASSERT( inlist[0] >= VB->Count );
+ tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
+ }
+ }
+
+ tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
+}
#undef W
#undef Z
projects / mesa.git / blobdiff