/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */ /* * Mesa 3-D graphics library * Version: 3.3 * * Copyright (C) 1999 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. * * * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the * terms stated above. * * Thank you for your contribution, David! * * Please make note of the above copyright/license statement. If you * contributed code or bug fixes to this code under the previous (GNU * Library) license and object to the new license, your code will be * removed at your request. Please see the Mesa docs/COPYRIGHT file * for more information. * * Additional Mesa/3Dfx driver developers: * Daryll Strauss * Keith Whitwell * * See fxapi.h for more revision/author details. */ #define V1 VARS_XYZW #define S1 DO_SETUP_XYZW #define T1 COPY_XYZW_STRIDE #define Z1 4 #if (IND & SETUP_RGBA) #define V2 V1 VARS_RGBA #define S2 S1 DO_SETUP_RGBA #define T2 T1 COPY_RGBA_STRIDE #define Z2 (Z1 + 4) #else #define V2 V1 #define S2 S1 #define T2 T1 #define Z2 Z1 #endif #if (IND & SETUP_TMU0) #define V3 V2 VARS_TMU0 #define S3 S2 DO_SETUP_TMU0(Z2) #define T3 T2 COPY_TMU0_STRIDE(Z2) #define Z3 (Z2 + 2) #else #define V3 V2 #define S3 S2 #define T3 T2 #define Z3 Z2 #endif #if (IND & SETUP_TMU1) #define V4 V3 VARS_TMU1 #define S4 S3 DO_SETUP_TMU1(Z3) #define T4 T3 COPY_TMU1_STRIDE(Z3) #define Z4 (Z3 + 2) #else #define V4 V3 #define S4 S3 #define T4 T3 #define Z4 Z3 #endif #if (Z4 & 2) #define SIZE (Z4+2) #define COPY_STRIDE T4 COPY_NIL(Z4) #else #define SIZE Z4 #define COPY_STRIDE T4 #endif #define VARS V4 #define SETUP S4 #define DRAW_LINE(tmp0, tmp1, width) \ do { \ GrVertex verts[4]; \ float dx, dy, ix, iy; \ \ dx = tmp0->x - tmp1->x; \ dy = tmp0->y - tmp1->y; \ \ if (dx * dx > dy * dy) { \ iy = width * .5; \ ix = 0; \ } else { \ iy = 0; \ ix = width * .5; \ } \ \ verts[0] = *tmp0; \ verts[1] = *tmp0; \ verts[2] = *tmp1; \ verts[3] = *tmp1; \ \ verts[0].x = tmp0->x - ix; \ verts[0].y = tmp0->y - iy; \ \ verts[1].x = tmp0->x + ix; \ verts[1].y = tmp0->y + iy; \ \ verts[2].x = tmp1->x + ix; \ verts[2].y = tmp1->y + iy; \ \ verts[3].x = tmp1->x - ix; \ verts[3].y = tmp1->y - iy; \ \ FX_grDrawPolygonVertexList(4, verts); \ } while (0) static void TAG(fx_tri_view_clip)( struct vertex_buffer *VB, GLuint v[], GLubyte mask ) { GLcontext *ctx = VB->ctx; fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx; GLfloat data[VB_MAX_CLIPPED_VERTS*12]; GLfloat *vlist[VB_MAX_CLIPPED_VERTS]; GrVertex *verts[VB_MAX_CLIPPED_VERTS]; fxVertex *gWin = FX_DRIVER_DATA(VB)->verts; GLfloat *out = data; GLfloat *mat = ctx->Viewport.WindowMap.m; GLuint i, n; GLubyte *clipmask = VB->ClipMask; GLuint tmu0_source = fxMesa->tmu_source[0]; GLuint tmu1_source = fxMesa->tmu_source[1]; GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source]; GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source]; (void) fxMesa; (void) tmu0_source; (void) tc0_vec; (void) tmu1_source; (void) tc1_vec; for (i = 0 ; i < 3 ; i++) { GLuint e = v[i]; verts[i] = 0; if (!clipmask[e]) verts[i] = (GrVertex *)gWin[e].f; vlist[i] = out; COPY_STRIDE; out += SIZE; } if ((n = fx_view_clip_triangle( ctx, vlist, verts, SIZE, mask )) >= 3) { GrVertex tmp[VB_MAX_CLIPPED_VERTS]; GrVertex *v = tmp, *v2, *v3; VARS; for (i = 0 ; i < n ; i++) if (!verts[i]) { GLfloat *data = vlist[i]; SETUP; verts[i] = v++; } v = verts[0]; v2 = verts[1]; v3 = verts[2]; for (i = 2 ; i < n ; v2 = v3, v3=verts[++i]) FX_grDrawTriangle(v, v2, v3); } } static void TAG(fx_tri_clip_stride)( struct vertex_buffer *VB, GLuint v[], GLuint mask ) { GLcontext *ctx = VB->ctx; fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx; GLfloat data[VB_MAX_CLIPPED_VERTS*12]; GLfloat *vlist[VB_MAX_CLIPPED_VERTS]; GrVertex *verts[VB_MAX_CLIPPED_VERTS]; fxVertex *gWin = FX_DRIVER_DATA(VB)->verts; GLfloat *out = data; GLfloat *mat = ctx->Viewport.WindowMap.m; GLuint i, n; GLubyte *clipmask = VB->ClipMask; GLuint tmu0_source = fxMesa->tmu_source[0]; GLuint tmu1_source = fxMesa->tmu_source[1]; GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source]; GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source]; (void) fxMesa; (void) tmu0_source; (void) tc0_vec; (void) tmu1_source; (void) tc1_vec; for (i = 0 ; i < 3 ; i++) { GLuint e = v[i]; verts[i] = 0; if (!clipmask[e]) verts[i] = (GrVertex *)gWin[e].f; vlist[i] = out; COPY_STRIDE; out += SIZE; } if (VB->ClipPtr->size < 4) { vlist[0][3] = vlist[1][3] = vlist[2][3] = 1.0; if (VB->ClipPtr->size == 2) vlist[0][2] = vlist[1][2] = vlist[2][2] = 0.0; } if ((n = fx_clip_triangle( ctx, vlist, verts, SIZE, mask )) >= 3) { GrVertex tmp[VB_MAX_CLIPPED_VERTS]; GrVertex *v = tmp, *v2, *v3; VARS; for (i = 0 ; i < n ; i++) if (!verts[i]) { GLfloat *data = vlist[i]; SETUP; verts[i] = v++; } v = verts[0]; v2 = verts[1]; v3 = verts[2]; for (i = 2 ; i < n ; v2 = v3, v3=verts[++i]) FX_grDrawTriangle(v, v2, v3); } } static void TAG(fx_line_clip)( struct vertex_buffer *VB, GLuint v1, GLuint v2, GLubyte mask ) { GLcontext *ctx = VB->ctx; fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx; GLfloat data[VB_MAX_CLIPPED_VERTS*12]; GLfloat *vlist[VB_MAX_CLIPPED_VERTS]; GLfloat *out = data; GLfloat *mat = ctx->Viewport.WindowMap.m; GLfloat w = ctx->Line.Width*.5; GLuint e, n; GLuint tmu0_source = fxMesa->tmu_source[0]; GLuint tmu1_source = fxMesa->tmu_source[1]; GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source]; GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source]; VARS; (void) fxMesa; (void) tmu0_source; (void) tc0_vec; (void) tmu1_source; (void) tc1_vec; vlist[0] = out; e = v1; COPY_STRIDE; out += SIZE; vlist[1] = out; e = v2; COPY_STRIDE; out += SIZE; if (VB->ClipPtr->size < 4) { vlist[0][3] = vlist[1][3] = 1.0; if (VB->ClipPtr->size == 2) vlist[0][2] = vlist[1][2] = 0.0; } if ((n = fx_clip_line( ctx, vlist, SIZE, mask )) != 0) { GrVertex gWin[2]; GrVertex *v; GLfloat *data; v = gWin; data = vlist[0]; SETUP; v++; data = vlist[1]; SETUP; DRAW_LINE(gWin, v, w); } } #undef V1 #undef S1 #undef C1 #undef Z1 #undef T1 #undef V2 #undef S2 #undef C2 #undef Z2 #undef T2 #undef V3 #undef S3 #undef C3 #undef Z3 #undef T3 #undef V4 #undef S4 #undef C4 #undef Z4 #undef T4 #undef VARS #undef SETUP #undef COPY #undef COPY_STRIDE #undef SIZE #undef IND #undef TAG