diff options
Diffstat (limited to 'src/mesa/main/clip.c')
| -rw-r--r-- | src/mesa/main/clip.c | 417 |
1 files changed, 19 insertions, 398 deletions
diff --git a/src/mesa/main/clip.c b/src/mesa/main/clip.c index 244753020b1..77d12814055 100644 --- a/src/mesa/main/clip.c +++ b/src/mesa/main/clip.c @@ -1,4 +1,4 @@ -/* $Id: clip.c,v 1.14 2000/11/13 20:02:56 keithw Exp $ */ +/* $Id: clip.c,v 1.15 2000/11/16 21:05:34 keithw Exp $ */ /* * Mesa 3-D graphics library @@ -30,133 +30,16 @@ #else #include "glheader.h" #include "clip.h" -#include "colormac.h" #include "context.h" #include "macros.h" -#include "matrix.h" #include "mmath.h" #include "types.h" -#include "vb.h" -#include "xform.h" -#endif - - - - -#define CLIP_RGBA0 0x1 -#define CLIP_RGBA1 0x2 -#define CLIP_TEX0 0x4 -#define CLIP_TEX1 0x8 -#define CLIP_INDEX0 0x10 -#define CLIP_INDEX1 0x20 -#define CLIP_FOG_COORD 0x40 - - -/* Linear interpolation between A and B: */ -#define LINTERP( T, A, B ) ( (A) + (T) * ( (B) - (A) ) ) - - - -#define INTERP_SZ( t, vec, to, a, b, sz ) \ -do { \ - switch (sz) { \ - case 4: vec[to][3] = LINTERP( t, vec[a][3], vec[b][3] ); \ - case 3: vec[to][2] = LINTERP( t, vec[a][2], vec[b][2] ); \ - case 2: vec[to][1] = LINTERP( t, vec[a][1], vec[b][1] ); \ - case 1: vec[to][0] = LINTERP( t, vec[a][0], vec[b][0] ); \ - } \ -} while(0) - - -static clip_interp_func clip_interp_tab[0x80]; - -#define IND 0 -#define NAME clip_nil -#include "interp_tmp.h" - -#define IND (CLIP_RGBA0) -#define NAME clipRGBA0 -#include "interp_tmp.h" - -#define IND (CLIP_RGBA0|CLIP_RGBA1) -#define NAME clipRGBA0_RGBA1 -#include "interp_tmp.h" - -#define IND (CLIP_TEX0|CLIP_RGBA0) -#define NAME clipTEX0_RGBA0 -#include "interp_tmp.h" - -#define IND (CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1) -#define NAME clipTEX0_RGBA0_RGBA1 -#include "interp_tmp.h" - -#define IND (CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0) -#define NAME clipTEX1_TEX0_RGBA0 -#include "interp_tmp.h" - -#define IND (CLIP_TEX0) -#define NAME clipTEX0 -#include "interp_tmp.h" - -#define IND (CLIP_TEX1|CLIP_TEX0) -#define NAME clipTEX1_TEX0 -#include "interp_tmp.h" - -#define IND (CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1) -#define NAME clipTEX1_TEX0_RGBA0_RGBA1 -#include "interp_tmp.h" - -#define IND (CLIP_INDEX0) -#define NAME clipINDEX0 -#include "interp_tmp.h" - -#define IND (CLIP_INDEX0|CLIP_INDEX1) -#define NAME clipINDEX0_INDEX1 -#include "interp_tmp.h" - -#define IND (CLIP_FOG_COORD) -#define NAME clip_FOG -#include "interp_tmp.h" - -#define IND (CLIP_RGBA0|CLIP_FOG_COORD) -#define NAME clipRGBA0_FOG -#include "interp_tmp.h" - -#define IND (CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD) -#define NAME clipRGBA0_RGBA1_FOG -#include "interp_tmp.h" - -#define IND (CLIP_TEX0|CLIP_RGBA0|CLIP_FOG_COORD) -#define NAME clipTEX0_RGBA0_FOG -#include "interp_tmp.h" - -#define IND (CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD) -#define NAME clipTEX0_RGBA0_RGBA1_FOG -#include "interp_tmp.h" - -#define IND (CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_FOG_COORD) -#define NAME clipTEX1_TEX0_RGBA0_FOG -#include "interp_tmp.h" - -#define IND (CLIP_TEX0|CLIP_FOG_COORD) -#define NAME clipTEX0_FOG -#include "interp_tmp.h" -#define IND (CLIP_TEX1|CLIP_TEX0|CLIP_FOG_COORD) -#define NAME clipTEX1_TEX0_FOG -#include "interp_tmp.h" - -#define IND (CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD) -#define NAME clipTEX1_TEX0_RGBA0_RGBA1_FOG -#include "interp_tmp.h" +#include "math/m_xform.h" +#include "math/m_matrix.h" +#endif -#define IND (CLIP_INDEX0|CLIP_FOG_COORD) -#define NAME clipINDEX0_FOG -#include "interp_tmp.h" -#define IND (CLIP_INDEX0|CLIP_INDEX1|CLIP_FOG_COORD) -#define NAME clipINDEX0_INDEX1_FOG -#include "interp_tmp.h" @@ -173,12 +56,6 @@ _mesa_ClipPlane( GLenum plane, const GLdouble *eq ) GET_CURRENT_CONTEXT(ctx); GLint p; GLfloat equation[4]; - - equation[0] = eq[0]; - equation[1] = eq[1]; - equation[2] = eq[2]; - equation[3] = eq[3]; - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glClipPlane"); p = (GLint) plane - (GLint) GL_CLIP_PLANE0; @@ -187,6 +64,11 @@ _mesa_ClipPlane( GLenum plane, const GLdouble *eq ) return; } + equation[0] = eq[0]; + equation[1] = eq[1]; + equation[2] = eq[2]; + equation[3] = eq[3]; + /* * The equation is transformed by the transpose of the inverse of the * current modelview matrix and stored in the resulting eye coordinates. @@ -195,17 +77,21 @@ _mesa_ClipPlane( GLenum plane, const GLdouble *eq ) * clipping now takes place. The clip-space equations are recalculated * whenever the projection matrix changes. */ - if (ctx->ModelView.flags & MAT_DIRTY_ALL_OVER) { - gl_matrix_analyze( &ctx->ModelView ); - } + if (ctx->ModelView.flags & MAT_DIRTY) + _math_matrix_analyze( &ctx->ModelView ); + gl_transform_vector( ctx->Transform.EyeUserPlane[p], equation, ctx->ModelView.inv ); + /* Update derived state. This state also depends on the projection + * matrix, and is recalculated on changes to the projection matrix by + * code in gl_update_state(). + */ if (ctx->Transform.ClipEnabled[p]) { - if (ctx->ProjectionMatrix.flags & MAT_DIRTY_ALL_OVER) { - gl_matrix_analyze( &ctx->ProjectionMatrix ); - } + if (ctx->ProjectionMatrix.flags & MAT_DIRTY) + _math_matrix_analyze( &ctx->ProjectionMatrix ); + gl_transform_vector( ctx->Transform._ClipUserPlane[p], ctx->Transform.EyeUserPlane[p], ctx->ProjectionMatrix.inv ); @@ -235,268 +121,3 @@ _mesa_GetClipPlane( GLenum plane, GLdouble *equation ) equation[2] = (GLdouble) ctx->Transform.EyeUserPlane[p][2]; equation[3] = (GLdouble) ctx->Transform.EyeUserPlane[p][3]; } - - - - -/**********************************************************************/ -/* View volume clipping. */ -/**********************************************************************/ - - -/* - * Clip a point against the view volume. - * Input: v - vertex-vector describing the point to clip - * Return: 0 = outside view volume - * 1 = inside view volume - */ -GLuint gl_viewclip_point( const GLfloat v[] ) -{ - if ( v[0] > v[3] || v[0] < -v[3] - || v[1] > v[3] || v[1] < -v[3] - || v[2] > v[3] || v[2] < -v[3] ) { - return 0; - } - else { - return 1; - } -} - -/* - * Clip a point against the user clipping planes. - * Input: v - vertex-vector describing the point to clip. - * Return: 0 = point was clipped - * 1 = point not clipped - */ -GLuint gl_userclip_point( GLcontext* ctx, const GLfloat v[] ) -{ - GLuint p; - - for (p=0;p<MAX_CLIP_PLANES;p++) { - if (ctx->Transform.ClipEnabled[p]) { - GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0] - + v[1] * ctx->Transform._ClipUserPlane[p][1] - + v[2] * ctx->Transform._ClipUserPlane[p][2] - + v[3] * ctx->Transform._ClipUserPlane[p][3]; - if (dot < 0.0F) { - return 0; - } - } - } - - return 1; -} - - - - -#if 0 -#define NEGATIVE(x) ((*(int *)&x)<0) -#define DIFFERENT_SIGNS(a,b) ((a*b) < 0) -#else -#define NEGATIVE(x) (x < 0) -#define DIFFERENT_SIGNS(a,b) ((a*b) < 0) -#endif - - -static clip_poly_func gl_poly_clip_tab[2][5]; -static clip_line_func gl_line_clip_tab[2][5]; - -#define W(i) coord[i][3] -#define Z(i) coord[i][2] -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 4 -#define IND 0 -#define TAG(x) x##_4 -#include "clip_funcs.h" - -#define W(i) 1.0 -#define Z(i) coord[i][2] -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 3 -#define IND 0 -#define TAG(x) x##_3 -#include "clip_funcs.h" - -#define W(i) 1.0 -#define Z(i) 0.0 -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 2 -#define IND 0 -#define TAG(x) x##_2 -#include "clip_funcs.h" - -#define W(i) coord[i][3] -#define Z(i) coord[i][2] -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 4 -#define IND CLIP_TAB_EDGEFLAG -#define TAG(x) x##_4_edgeflag -#include "clip_funcs.h" - -#define W(i) 1.0 -#define Z(i) coord[i][2] -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 3 -#define IND CLIP_TAB_EDGEFLAG -#define TAG(x) x##_3_edgeflag -#include "clip_funcs.h" - -#define W(i) 1.0 -#define Z(i) 0.0 -#define Y(i) coord[i][1] -#define X(i) coord[i][0] -#define SIZE 2 -#define IND CLIP_TAB_EDGEFLAG -#define TAG(x) x##_2_edgeflag -#include "clip_funcs.h" - - - - -void gl_update_clipmask( GLcontext *ctx ) -{ - GLuint mask = 0; - - if (ctx->Visual.RGBAflag) - { - mask |= CLIP_RGBA0; - - if (ctx->_TriangleCaps & (DD_TRI_LIGHT_TWOSIDE|DD_SEPERATE_SPECULAR)) - mask |= CLIP_RGBA1; - - if (ctx->Texture._ReallyEnabled & 0xf0) - mask |= CLIP_TEX1|CLIP_TEX0; - - if (ctx->Texture._ReallyEnabled & 0xf) - mask |= CLIP_TEX0; - } - else if (ctx->Light.ShadeModel==GL_SMOOTH) - { - mask |= CLIP_INDEX0; - - if (ctx->_TriangleCaps & DD_TRI_LIGHT_TWOSIDE) - mask |= CLIP_INDEX1; - } - - if (ctx->Fog.Enabled) - mask |= CLIP_FOG_COORD; - - ctx->_ClipInterpFunc = clip_interp_tab[mask]; - ctx->_poly_clip_tab = gl_poly_clip_tab[0]; - ctx->_line_clip_tab = gl_line_clip_tab[0]; - - if (ctx->_TriangleCaps & DD_TRI_UNFILLED) { - ctx->_poly_clip_tab = gl_poly_clip_tab[1]; - ctx->_line_clip_tab = gl_line_clip_tab[0]; - } -} - - -#define USER_CLIPTEST(NAME, SZ) \ -static void NAME( struct vertex_buffer *VB ) \ -{ \ - GLcontext *ctx = VB->ctx; \ - GLubyte *clipMask = VB->ClipMask; \ - GLubyte *userClipMask = VB->UserClipMask; \ - GLuint start = VB->Start; \ - GLuint count = VB->Count; \ - GLuint p, i; \ - GLubyte bit; \ - \ - \ - for (bit = 1, p = 0; p < MAX_CLIP_PLANES ; p++, bit *=2) \ - if (ctx->Transform.ClipEnabled[p]) { \ - GLuint nr = 0; \ - 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]; \ - GLfloat *coord = VB->ClipPtr->start; \ - GLuint stride = VB->ClipPtr->stride; \ - \ - for (i = start ; i < count ; i++, STRIDE_F(coord, stride)) { \ - GLfloat dp = coord[0] * a + coord[1] * b; \ - if (SZ > 2) dp += coord[2] * c; \ - if (SZ > 3) dp += coord[3] * d; else dp += d; \ - \ - if (dp < 0) { \ - clipMask[i] |= CLIP_USER_BIT; \ - userClipMask[i] |= bit; \ - nr++; \ - } \ - } \ - \ - if (nr > 0) { \ - VB->ClipOrMask |= CLIP_USER_BIT; \ - VB->CullMode |= CLIP_MASK_ACTIVE; \ - if (nr == count - start) { \ - VB->ClipAndMask |= CLIP_USER_BIT; \ - VB->Culled = 1; \ - return; \ - } \ - } \ - } \ -} - - -USER_CLIPTEST(userclip2, 2) -USER_CLIPTEST(userclip3, 3) -USER_CLIPTEST(userclip4, 4) - -static void (*(usercliptab[5]))( struct vertex_buffer * ) = { - 0, - 0, - userclip2, - userclip3, - userclip4 -}; - -void gl_user_cliptest( struct vertex_buffer *VB ) -{ - usercliptab[VB->ClipPtr->size]( VB ); -} - - -void gl_init_clip(void) -{ - init_clip_funcs_4(); - init_clip_funcs_3(); - init_clip_funcs_2(); - - init_clip_funcs_4_edgeflag(); - init_clip_funcs_3_edgeflag(); - init_clip_funcs_2_edgeflag(); - - clip_interp_tab[0] = clip_nil; - clip_interp_tab[CLIP_RGBA0] = clipRGBA0; - clip_interp_tab[CLIP_RGBA0|CLIP_RGBA1] = clipRGBA0_RGBA1; - clip_interp_tab[CLIP_TEX0|CLIP_RGBA0] = clipTEX0_RGBA0; - clip_interp_tab[CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1] = clipTEX0_RGBA0_RGBA1; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0] = clipTEX1_TEX0_RGBA0; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1] = - clipTEX1_TEX0_RGBA0_RGBA1; - clip_interp_tab[CLIP_TEX0] = clipTEX0; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0] = clipTEX1_TEX0; - clip_interp_tab[CLIP_INDEX0] = clipINDEX0; - clip_interp_tab[CLIP_INDEX0|CLIP_INDEX1] = clipINDEX0_INDEX1; - - clip_interp_tab[CLIP_FOG_COORD] = clip_FOG; - clip_interp_tab[CLIP_RGBA0|CLIP_FOG_COORD] = clipRGBA0_FOG; - clip_interp_tab[CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD] = clipRGBA0_RGBA1_FOG; - clip_interp_tab[CLIP_TEX0|CLIP_RGBA0|CLIP_FOG_COORD] = clipTEX0_RGBA0_FOG; - clip_interp_tab[CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD] = clipTEX0_RGBA0_RGBA1_FOG; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_FOG_COORD] = clipTEX1_TEX0_RGBA0_FOG; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0|CLIP_RGBA0|CLIP_RGBA1|CLIP_FOG_COORD] = - clipTEX1_TEX0_RGBA0_RGBA1_FOG; - clip_interp_tab[CLIP_TEX0|CLIP_FOG_COORD] = clipTEX0_FOG; - clip_interp_tab[CLIP_TEX1|CLIP_TEX0|CLIP_FOG_COORD] = clipTEX1_TEX0_FOG; - clip_interp_tab[CLIP_INDEX0|CLIP_FOG_COORD] = clipINDEX0_FOG; - clip_interp_tab[CLIP_INDEX0|CLIP_INDEX1|CLIP_FOG_COORD] = clipINDEX0_INDEX1_FOG; -} - |