/*
* Mesa 3-D graphics library
- * Version: 6.5.2
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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>
+ * Keith Whitwell <keithw@vmware.com>
*/
GLuint idx = inlist[i]; \
GLfloat dp = CLIP_DOTPROD(idx, A, B, C, D ); \
\
- if (!IS_NEGATIVE(dpPrev)) { \
+ if (dpPrev >= 0.0f) { \
outlist[outcount++] = idxPrev; \
} \
\
if (DIFFERENT_SIGNS(dp, dpPrev)) { \
- if (IS_NEGATIVE(dp)) { \
+ if (dp < 0.0f) { \
/* Going out of bounds. Avoid division by zero as we \
* know dp != dpPrev from DIFFERENT_SIGNS, above. \
*/ \
} while (0)
-#define POLY_USERCLIP(PLANE) \
-do { \
- if (mask & CLIP_USER_BIT) { \
- GLuint idxPrev = inlist[0]; \
- GLfloat dpPrev = VB->ClipDistancePtr[PLANE][idxPrev]; \
- 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 = VB->ClipDistancePtr[PLANE][idx]; \
- \
- 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); \
+ const GLboolean neg_dp0 = dp0 < 0.0f; \
+ const GLboolean neg_dp1 = dp1 < 0.0f; \
\
/* 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)
-
-
-#define LINE_USERCLIP(PLANE) \
-do { \
- if (mask & CLIP_USER_BIT) { \
- const GLfloat dp0 = VB->ClipDistancePtr[PLANE][v0]; \
- const GLfloat dp1 = VB->ClipDistancePtr[PLANE][v1]; \
- 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: \
+ * hence the second < 0.0f test: \
*/ \
if (neg_dp0 && neg_dp1) \
return; /* both vertices outside clip plane: discard */ \
/* Clip a line against the viewport and user clip planes.
*/
-static INLINE void
-TAG(clip_line)( GLcontext *ctx, GLuint v0, GLuint v1, GLubyte mask )
+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;
GLuint newvert = VB->Count;
GLfloat t0 = 0;
GLfloat t1 = 0;
- GLuint p;
const GLuint v0_orig = v0;
if (mask & CLIP_FRUSTUM_BITS) {
}
if (mask & CLIP_USER_BIT) {
- for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
- if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- LINE_USERCLIP(p);
- }
+ GLbitfield enabled = ctx->Transform.ClipPlanesEnabled;
+ while (enabled) {
+ const int p = u_bit_scan(&enabled);
+ 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 );
}
}
newvert++;
}
else {
- ASSERT(t0 == 0.0);
+ assert(t0 == 0.0);
}
/* Note: we need to use vertex v0_orig when computing the new
newvert++;
}
else {
- ASSERT(t1 == 0.0);
+ 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)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
+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;
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;
- _mesa_printf("pre clip:\n");
+ printf("pre clip:\n");
for (i = 0; i < n; i++) {
j = inlist[i];
- _mesa_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]));
+ printf(" %u: %u: %f, %f, %f, %f\n",
+ i, j,
+ coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
+ assert(!util_is_inf_or_nan(coord[j][0]));
+ assert(!util_is_inf_or_nan(coord[j][1]));
+ assert(!util_is_inf_or_nan(coord[j][2]));
+ assert(!util_is_inf_or_nan(coord[j][3]));
}
}
}
if (mask & CLIP_USER_BIT) {
- for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
- if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- POLY_USERCLIP(p);
- }
+ GLbitfield enabled = ctx->Transform.ClipPlanesEnabled;
+ while (enabled) {
+ const int p = u_bit_scan(&enabled);
+ 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 );
+ assert( inlist[0] >= VB->Count );
tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
}
}
if (0) {
/* print post-clip vertex coords */
GLuint i, j;
- _mesa_printf("post clip:\n");
+ printf("post clip:\n");
for (i = 0; i < n; i++) {
j = inlist[i];
- _mesa_printf(" %u: %u: %f, %f, %f, %f\n",
- i, j,
- coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
+ printf(" %u: %u: %f, %f, %f, %f\n",
+ i, j,
+ coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
}
}
/* 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,
+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);
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_USER_BIT) {
- for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
- if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- POLY_USERCLIP(p);
- }
+ GLbitfield enabled = ctx->Transform.ClipPlanesEnabled;
+ while (enabled) {
+ const int p = u_bit_scan(&enabled);
+ 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 );
+ assert( inlist[0] >= VB->Count );
tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
}
}
#undef SIZE
#undef TAG
#undef POLY_CLIP
-#undef POLY_USERCLIP
#undef LINE_CLIP
-#undef LINE_USERCLIP
projects / mesa.git / blobdiff