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Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.
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Colin Finck
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24198 changed files with 0 additions and 37285 deletions
320
dll/opengl/mesa/tnl/t_vb_cliptmp.h
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320
dll/opengl/mesa/tnl/t_vb_cliptmp.h
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/*
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* Mesa 3-D graphics library
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* Version: 6.5.2
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*
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#define CLIP_DOTPROD(K, A, B, C, D) X(K)*A + Y(K)*B + Z(K)*C + W(K)*D
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#define POLY_CLIP( PLANE_BIT, A, B, C, D ) \
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do { \
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if (mask & PLANE_BIT) { \
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GLuint idxPrev = inlist[0]; \
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GLfloat dpPrev = CLIP_DOTPROD(idxPrev, A, B, C, D ); \
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GLuint outcount = 0; \
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GLuint i; \
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\
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inlist[n] = inlist[0]; /* prevent rotation of vertices */ \
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for (i = 1; i <= n; i++) { \
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GLuint idx = inlist[i]; \
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GLfloat dp = CLIP_DOTPROD(idx, A, B, C, D ); \
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\
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if (!IS_NEGATIVE(dpPrev)) { \
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outlist[outcount++] = idxPrev; \
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} \
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\
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if (DIFFERENT_SIGNS(dp, dpPrev)) { \
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if (IS_NEGATIVE(dp)) { \
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/* Going out of bounds. Avoid division by zero as we \
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* know dp != dpPrev from DIFFERENT_SIGNS, above. \
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*/ \
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GLfloat t = dp / (dp - dpPrev); \
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INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \
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interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \
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} else { \
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/* Coming back in. \
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*/ \
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GLfloat t = dpPrev / (dpPrev - dp); \
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INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \
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interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \
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} \
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outlist[outcount++] = newvert++; \
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} \
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\
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idxPrev = idx; \
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dpPrev = dp; \
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} \
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\
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if (outcount < 3) \
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return; \
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\
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{ \
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GLuint *tmp = inlist; \
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inlist = outlist; \
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outlist = tmp; \
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n = outcount; \
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} \
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} \
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} while (0)
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#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \
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do { \
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if (mask & PLANE_BIT) { \
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const GLfloat dp0 = CLIP_DOTPROD( v0, A, B, C, D ); \
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const GLfloat dp1 = CLIP_DOTPROD( v1, A, B, C, D ); \
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const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \
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const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \
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\
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/* For regular clipping, we know from the clipmask that one \
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* (or both) of these must be negative (otherwise we wouldn't \
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* be here). \
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* For userclip, there is only a single bit for all active \
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* planes, so we can end up here when there is nothing to do, \
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* hence the second IS_NEGATIVE() test: \
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*/ \
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if (neg_dp0 && neg_dp1) \
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return; /* both vertices outside clip plane: discard */ \
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\
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if (neg_dp1) { \
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GLfloat t = dp1 / (dp1 - dp0); \
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if (t > t1) t1 = t; \
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} else if (neg_dp0) { \
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GLfloat t = dp0 / (dp0 - dp1); \
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if (t > t0) t0 = t; \
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} \
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if (t0 + t1 >= 1.0) \
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return; /* discard */ \
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} \
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} while (0)
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/* Clip a line against the viewport and user clip planes.
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*/
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static inline void
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TAG(clip_line)( struct gl_context *ctx, GLuint v0, GLuint v1, GLubyte mask )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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tnl_interp_func interp = tnl->Driver.Render.Interp;
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GLfloat (*coord)[4] = VB->ClipPtr->data;
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GLuint newvert = VB->Count;
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GLfloat t0 = 0;
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GLfloat t1 = 0;
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GLuint p;
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const GLuint v0_orig = v0;
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if (mask & CLIP_FRUSTUM_BITS) {
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LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
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LINE_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
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LINE_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
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LINE_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
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LINE_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
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LINE_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
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}
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if (mask & CLIP_USER_BIT) {
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for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
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if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
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const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
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const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
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const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
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const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
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LINE_CLIP( CLIP_USER_BIT, a, b, c, d );
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}
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}
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}
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if (VB->ClipMask[v0]) {
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INTERP_4F( t0, coord[newvert], coord[v0], coord[v1] );
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interp( ctx, t0, newvert, v0, v1, GL_FALSE );
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v0 = newvert;
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newvert++;
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}
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else {
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ASSERT(t0 == 0.0);
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}
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/* Note: we need to use vertex v0_orig when computing the new
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* interpolated/clipped vertex position, not the current v0 which
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* may have got set when we clipped the other end of the line!
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*/
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if (VB->ClipMask[v1]) {
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INTERP_4F( t1, coord[newvert], coord[v1], coord[v0_orig] );
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interp( ctx, t1, newvert, v1, v0_orig, GL_FALSE );
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if (ctx->Light.ShadeModel == GL_FLAT)
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tnl->Driver.Render.CopyPV( ctx, newvert, v1 );
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v1 = newvert;
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newvert++;
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}
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else {
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ASSERT(t1 == 0.0);
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}
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tnl->Driver.Render.ClippedLine( ctx, v0, v1 );
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}
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/* Clip a triangle against the viewport and user clip planes.
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*/
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static inline void
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TAG(clip_tri)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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tnl_interp_func interp = tnl->Driver.Render.Interp;
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GLuint newvert = VB->Count;
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GLfloat (*coord)[4] = VB->ClipPtr->data;
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GLuint pv = v2;
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GLuint vlist[2][MAX_CLIPPED_VERTICES];
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GLuint *inlist = vlist[0], *outlist = vlist[1];
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GLuint p;
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GLuint n = 3;
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ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */
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if (0) {
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/* print pre-clip vertex coords */
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GLuint i, j;
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printf("pre clip:\n");
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for (i = 0; i < n; i++) {
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j = inlist[i];
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printf(" %u: %u: %f, %f, %f, %f\n",
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i, j,
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coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
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assert(!IS_INF_OR_NAN(coord[j][0]));
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assert(!IS_INF_OR_NAN(coord[j][1]));
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assert(!IS_INF_OR_NAN(coord[j][2]));
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assert(!IS_INF_OR_NAN(coord[j][3]));
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}
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}
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if (mask & CLIP_FRUSTUM_BITS) {
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POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
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POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
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POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
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POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
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POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
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POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
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}
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if (mask & CLIP_USER_BIT) {
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for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
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if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
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const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
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const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
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const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
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const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
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POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
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}
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}
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}
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if (ctx->Light.ShadeModel == GL_FLAT) {
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if (pv != inlist[0]) {
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ASSERT( inlist[0] >= VB->Count );
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tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
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}
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}
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if (0) {
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/* print post-clip vertex coords */
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GLuint i, j;
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printf("post clip:\n");
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for (i = 0; i < n; i++) {
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j = inlist[i];
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printf(" %u: %u: %f, %f, %f, %f\n",
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i, j,
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coord[j][0], coord[j][1], coord[j][2], coord[j][3]);
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}
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}
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tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
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}
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/* Clip a quad against the viewport and user clip planes.
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*/
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static inline void
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TAG(clip_quad)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3,
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GLubyte mask )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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tnl_interp_func interp = tnl->Driver.Render.Interp;
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GLuint newvert = VB->Count;
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GLfloat (*coord)[4] = VB->ClipPtr->data;
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GLuint pv = v3;
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GLuint vlist[2][MAX_CLIPPED_VERTICES];
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GLuint *inlist = vlist[0], *outlist = vlist[1];
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GLuint p;
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GLuint n = 4;
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ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */
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if (mask & CLIP_FRUSTUM_BITS) {
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POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 );
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POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 );
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POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 );
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POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 );
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POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 );
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POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 );
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}
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if (mask & CLIP_USER_BIT) {
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for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
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if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
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const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
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const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
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const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
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const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
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POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
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}
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}
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}
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if (ctx->Light.ShadeModel == GL_FLAT) {
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if (pv != inlist[0]) {
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ASSERT( inlist[0] >= VB->Count );
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tnl->Driver.Render.CopyPV( ctx, inlist[0], pv );
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}
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}
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tnl->Driver.Render.ClippedPolygon( ctx, inlist, n );
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}
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#undef W
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#undef Z
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#undef Y
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#undef X
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#undef SIZE
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#undef TAG
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#undef POLY_CLIP
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#undef LINE_CLIP
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