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-rw-r--r--mesalib/src/mesa/tnl/t_vb_cliptmp.h640
1 files changed, 320 insertions, 320 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_cliptmp.h b/mesalib/src/mesa/tnl/t_vb_cliptmp.h
index b67aaddda..0b45bc534 100644
--- a/mesalib/src/mesa/tnl/t_vb_cliptmp.h
+++ b/mesalib/src/mesa/tnl/t_vb_cliptmp.h
@@ -1,320 +1,320 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 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>
- */
-
-
-#define CLIP_DOTPROD(K, A, B, C, D) X(K)*A + Y(K)*B + Z(K)*C + W(K)*D
-
-#define POLY_CLIP( PLANE_BIT, A, B, C, D ) \
-do { \
- if (mask & PLANE_BIT) { \
- GLuint idxPrev = inlist[0]; \
- 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 ); \
- \
- if (!IS_NEGATIVE(dpPrev)) { \
- outlist[outcount++] = idxPrev; \
- } \
- \
- if (DIFFERENT_SIGNS(dp, dpPrev)) { \
- 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); \
- INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \
- interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \
- } else { \
- /* Coming back in. \
- */ \
- GLfloat t = dpPrev / (dpPrev - dp); \
- INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \
- interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \
- } \
- outlist[outcount++] = newvert++; \
- } \
- \
- idxPrev = idx; \
- dpPrev = dp; \
- } \
- \
- if (outcount < 3) \
- return; \
- \
- { \
- GLuint *tmp = inlist; \
- inlist = outlist; \
- outlist = tmp; \
- n = outcount; \
- } \
- } \
-} while (0)
-
-
-#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \
-do { \
- if (mask & PLANE_BIT) { \
- const GLfloat dp0 = CLIP_DOTPROD( v0, A, B, C, D ); \
- const GLfloat dp1 = CLIP_DOTPROD( v1, A, B, C, D ); \
- const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \
- const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \
- \
- /* For regular clipping, we know from the clipmask that one \
- * (or both) of these must be negative (otherwise we wouldn't \
- * be here). \
- * For userclip, there is only a single bit for all active \
- * planes, so we can end up here when there is nothing to do, \
- * hence the second IS_NEGATIVE() test: \
- */ \
- if (neg_dp0 && neg_dp1) \
- return; /* both vertices outside clip plane: discard */ \
- \
- if (neg_dp1) { \
- GLfloat t = dp1 / (dp1 - dp0); \
- if (t > t1) t1 = t; \
- } else if (neg_dp0) { \
- GLfloat t = dp0 / (dp0 - dp1); \
- if (t > t0) t0 = t; \
- } \
- if (t0 + t1 >= 1.0) \
- return; /* discard */ \
- } \
-} while (0)
-
-
-
-/* Clip a line against the viewport and user clip planes.
- */
-static INLINE void
-TAG(clip_line)( struct gl_context *ctx, GLuint v0, GLuint v1, 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 newvert = VB->Count;
- GLfloat t0 = 0;
- GLfloat t1 = 0;
- GLuint p;
- const GLuint v0_orig = v0;
-
- if (mask & CLIP_FRUSTUM_BITS) {
- LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
- LINE_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
- LINE_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
- LINE_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
- LINE_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
- LINE_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
- }
-
- if (mask & CLIP_USER_BIT) {
- for (p = 0; p < ctx->Const.MaxClipPlanes; 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];
- LINE_CLIP( CLIP_USER_BIT, a, b, c, d );
- }
- }
- }
-
- if (VB->ClipMask[v0]) {
- INTERP_4F( t0, coord[newvert], coord[v0], coord[v1] );
- interp( ctx, t0, newvert, v0, v1, GL_FALSE );
- v0 = newvert;
- newvert++;
- }
- else {
- ASSERT(t0 == 0.0);
- }
-
- /* Note: we need to use vertex v0_orig when computing the new
- * interpolated/clipped vertex position, not the current v0 which
- * may have got set when we clipped the other end of the line!
- */
- if (VB->ClipMask[v1]) {
- INTERP_4F( t1, coord[newvert], coord[v1], coord[v0_orig] );
- interp( ctx, t1, newvert, v1, v0_orig, GL_FALSE );
-
- if (ctx->Light.ShadeModel == GL_FLAT)
- tnl->Driver.Render.CopyPV( ctx, newvert, v1 );
-
- v1 = newvert;
-
- newvert++;
- }
- else {
- ASSERT(t1 == 0.0);
- }
-
- tnl->Driver.Render.ClippedLine( ctx, v0, v1 );
-}
-
-
-/* Clip a triangle against the viewport and user clip planes.
- */
-static INLINE void
-TAG(clip_tri)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
-{
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_buffer *VB = &tnl->vb;
- tnl_interp_func interp = tnl->Driver.Render.Interp;
- GLuint newvert = VB->Count;
- GLfloat (*coord)[4] = VB->ClipPtr->data;
- GLuint pv = v2;
- GLuint vlist[2][MAX_CLIPPED_VERTICES];
- GLuint *inlist = vlist[0], *outlist = vlist[1];
- GLuint p;
- GLuint n = 3;
-
- ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */
-
- if (0) {
- /* print pre-clip vertex coords */
- GLuint i, j;
- printf("pre clip:\n");
- for (i = 0; i < n; i++) {
- j = inlist[i];
- printf(" %u: %u: %f, %f, %f, %f\n",
- i, j,
- coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
- assert(!IS_INF_OR_NAN(coord[j][0]));
- assert(!IS_INF_OR_NAN(coord[j][1]));
- assert(!IS_INF_OR_NAN(coord[j][2]));
- assert(!IS_INF_OR_NAN(coord[j][3]));
- }
- }
-
-
- if (mask & CLIP_FRUSTUM_BITS) {
- 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 < ctx->Const.MaxClipPlanes; 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->Light.ShadeModel == GL_FLAT) {
- if (pv != inlist[0]) {
- ASSERT( inlist[0] >= VB->Count );
- tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
- }
- }
-
- if (0) {
- /* print post-clip vertex coords */
- GLuint i, j;
- printf("post clip:\n");
- for (i = 0; i < n; i++) {
- j = inlist[i];
- printf(" %u: %u: %f, %f, %f, %f\n",
- i, j,
- coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
- }
- }
-
- tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
-}
-
-
-/* Clip a quad against the viewport and user clip planes.
- */
-static INLINE void
-TAG(clip_quad)( struct gl_context *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;
- GLuint newvert = VB->Count;
- GLfloat (*coord)[4] = VB->ClipPtr->data;
- GLuint pv = v3;
- GLuint vlist[2][MAX_CLIPPED_VERTICES];
- GLuint *inlist = vlist[0], *outlist = vlist[1];
- GLuint p;
- GLuint n = 4;
-
- ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */
-
- if (mask & CLIP_FRUSTUM_BITS) {
- 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 < ctx->Const.MaxClipPlanes; 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->Light.ShadeModel == GL_FLAT) {
- 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
-#undef Y
-#undef X
-#undef SIZE
-#undef TAG
-#undef POLY_CLIP
-#undef LINE_CLIP
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 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>
+ */
+
+
+#define CLIP_DOTPROD(K, A, B, C, D) X(K)*A + Y(K)*B + Z(K)*C + W(K)*D
+
+#define POLY_CLIP( PLANE_BIT, A, B, C, D ) \
+do { \
+ if (mask & PLANE_BIT) { \
+ GLuint idxPrev = inlist[0]; \
+ 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 ); \
+ \
+ if (!IS_NEGATIVE(dpPrev)) { \
+ outlist[outcount++] = idxPrev; \
+ } \
+ \
+ if (DIFFERENT_SIGNS(dp, dpPrev)) { \
+ 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); \
+ INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \
+ interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \
+ } else { \
+ /* Coming back in. \
+ */ \
+ GLfloat t = dpPrev / (dpPrev - dp); \
+ INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \
+ interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \
+ } \
+ outlist[outcount++] = newvert++; \
+ } \
+ \
+ idxPrev = idx; \
+ dpPrev = dp; \
+ } \
+ \
+ if (outcount < 3) \
+ return; \
+ \
+ { \
+ GLuint *tmp = inlist; \
+ inlist = outlist; \
+ outlist = tmp; \
+ n = outcount; \
+ } \
+ } \
+} while (0)
+
+
+#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \
+do { \
+ if (mask & PLANE_BIT) { \
+ const GLfloat dp0 = CLIP_DOTPROD( v0, A, B, C, D ); \
+ const GLfloat dp1 = CLIP_DOTPROD( v1, A, B, C, D ); \
+ const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \
+ const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \
+ \
+ /* For regular clipping, we know from the clipmask that one \
+ * (or both) of these must be negative (otherwise we wouldn't \
+ * be here). \
+ * For userclip, there is only a single bit for all active \
+ * planes, so we can end up here when there is nothing to do, \
+ * hence the second IS_NEGATIVE() test: \
+ */ \
+ if (neg_dp0 && neg_dp1) \
+ return; /* both vertices outside clip plane: discard */ \
+ \
+ if (neg_dp1) { \
+ GLfloat t = dp1 / (dp1 - dp0); \
+ if (t > t1) t1 = t; \
+ } else if (neg_dp0) { \
+ GLfloat t = dp0 / (dp0 - dp1); \
+ if (t > t0) t0 = t; \
+ } \
+ if (t0 + t1 >= 1.0) \
+ return; /* discard */ \
+ } \
+} while (0)
+
+
+
+/* Clip a line against the viewport and user clip planes.
+ */
+static inline void
+TAG(clip_line)( struct gl_context *ctx, GLuint v0, GLuint v1, 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 newvert = VB->Count;
+ GLfloat t0 = 0;
+ GLfloat t1 = 0;
+ GLuint p;
+ const GLuint v0_orig = v0;
+
+ if (mask & CLIP_FRUSTUM_BITS) {
+ LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
+ LINE_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
+ LINE_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
+ LINE_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
+ LINE_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
+ LINE_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
+ }
+
+ if (mask & CLIP_USER_BIT) {
+ for (p = 0; p < ctx->Const.MaxClipPlanes; 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];
+ LINE_CLIP( CLIP_USER_BIT, a, b, c, d );
+ }
+ }
+ }
+
+ if (VB->ClipMask[v0]) {
+ INTERP_4F( t0, coord[newvert], coord[v0], coord[v1] );
+ interp( ctx, t0, newvert, v0, v1, GL_FALSE );
+ v0 = newvert;
+ newvert++;
+ }
+ else {
+ ASSERT(t0 == 0.0);
+ }
+
+ /* Note: we need to use vertex v0_orig when computing the new
+ * interpolated/clipped vertex position, not the current v0 which
+ * may have got set when we clipped the other end of the line!
+ */
+ if (VB->ClipMask[v1]) {
+ INTERP_4F( t1, coord[newvert], coord[v1], coord[v0_orig] );
+ interp( ctx, t1, newvert, v1, v0_orig, GL_FALSE );
+
+ if (ctx->Light.ShadeModel == GL_FLAT)
+ tnl->Driver.Render.CopyPV( ctx, newvert, v1 );
+
+ v1 = newvert;
+
+ newvert++;
+ }
+ else {
+ ASSERT(t1 == 0.0);
+ }
+
+ tnl->Driver.Render.ClippedLine( ctx, v0, v1 );
+}
+
+
+/* Clip a triangle against the viewport and user clip planes.
+ */
+static inline void
+TAG(clip_tri)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ tnl_interp_func interp = tnl->Driver.Render.Interp;
+ GLuint newvert = VB->Count;
+ GLfloat (*coord)[4] = VB->ClipPtr->data;
+ GLuint pv = v2;
+ GLuint vlist[2][MAX_CLIPPED_VERTICES];
+ GLuint *inlist = vlist[0], *outlist = vlist[1];
+ GLuint p;
+ GLuint n = 3;
+
+ ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */
+
+ if (0) {
+ /* print pre-clip vertex coords */
+ GLuint i, j;
+ printf("pre clip:\n");
+ for (i = 0; i < n; i++) {
+ j = inlist[i];
+ printf(" %u: %u: %f, %f, %f, %f\n",
+ i, j,
+ coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
+ assert(!IS_INF_OR_NAN(coord[j][0]));
+ assert(!IS_INF_OR_NAN(coord[j][1]));
+ assert(!IS_INF_OR_NAN(coord[j][2]));
+ assert(!IS_INF_OR_NAN(coord[j][3]));
+ }
+ }
+
+
+ if (mask & CLIP_FRUSTUM_BITS) {
+ 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 < ctx->Const.MaxClipPlanes; 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->Light.ShadeModel == GL_FLAT) {
+ if (pv != inlist[0]) {
+ ASSERT( inlist[0] >= VB->Count );
+ tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
+ }
+ }
+
+ if (0) {
+ /* print post-clip vertex coords */
+ GLuint i, j;
+ printf("post clip:\n");
+ for (i = 0; i < n; i++) {
+ j = inlist[i];
+ printf(" %u: %u: %f, %f, %f, %f\n",
+ i, j,
+ coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
+ }
+ }
+
+ tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
+}
+
+
+/* Clip a quad against the viewport and user clip planes.
+ */
+static inline void
+TAG(clip_quad)( struct gl_context *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;
+ GLuint newvert = VB->Count;
+ GLfloat (*coord)[4] = VB->ClipPtr->data;
+ GLuint pv = v3;
+ GLuint vlist[2][MAX_CLIPPED_VERTICES];
+ GLuint *inlist = vlist[0], *outlist = vlist[1];
+ GLuint p;
+ GLuint n = 4;
+
+ ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */
+
+ if (mask & CLIP_FRUSTUM_BITS) {
+ 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 < ctx->Const.MaxClipPlanes; 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->Light.ShadeModel == GL_FLAT) {
+ 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
+#undef Y
+#undef X
+#undef SIZE
+#undef TAG
+#undef POLY_CLIP
+#undef LINE_CLIP
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 10:37:39 +0000