diff options
Diffstat (limited to 'src/mesa/tnl/t_vb_cliptmp.h')
| -rw-r--r-- | src/mesa/tnl/t_vb_cliptmp.h | 103 |
1 files changed, 15 insertions, 88 deletions
diff --git a/src/mesa/tnl/t_vb_cliptmp.h b/src/mesa/tnl/t_vb_cliptmp.h index 0d2183a9e6..618b8b3130 100644 --- a/src/mesa/tnl/t_vb_cliptmp.h +++ b/src/mesa/tnl/t_vb_cliptmp.h @@ -80,58 +80,6 @@ do { \ } 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) { \ @@ -163,37 +111,6 @@ do { \ } 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: \ - */ \ - 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. */ @@ -222,7 +139,11 @@ TAG(clip_line)( GLcontext *ctx, GLuint v0, GLuint v1, GLubyte mask ) if (mask & CLIP_USER_BIT) { for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - LINE_USERCLIP(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 ); } } } @@ -307,7 +228,11 @@ TAG(clip_tri)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask ) if (mask & CLIP_USER_BIT) { for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - POLY_USERCLIP(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 ); } } } @@ -366,7 +291,11 @@ TAG(clip_quad)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3, if (mask & CLIP_USER_BIT) { for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - POLY_USERCLIP(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 ); } } } @@ -388,6 +317,4 @@ TAG(clip_quad)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3, #undef SIZE #undef TAG #undef POLY_CLIP -#undef POLY_USERCLIP #undef LINE_CLIP -#undef LINE_USERCLIP |