| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2005 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 |
| * 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 <keithw@vmware.com> |
| */ |
| |
| |
| /* |
| * Render whole vertex buffers, including projection of vertices from |
| * clip space and clipping of primitives. |
| * |
| * This file makes calls to project vertices and to the point, line |
| * and triangle rasterizers via the function pointers: |
| * |
| * context->Driver.Render.* |
| * |
| */ |
| |
| |
| #include <stdio.h> |
| #include "main/glheader.h" |
| #include "main/context.h" |
| #include "main/enums.h" |
| #include "main/macros.h" |
| #include "main/imports.h" |
| #include "main/mtypes.h" |
| #include "math/m_xform.h" |
| |
| #include "t_pipeline.h" |
| |
| |
| |
| /**********************************************************************/ |
| /* Clip single primitives */ |
| /**********************************************************************/ |
| |
| |
| #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 TAG(x) x##_4 |
| #include "t_vb_cliptmp.h" |
| |
| |
| |
| /**********************************************************************/ |
| /* Clip and render whole begin/end objects */ |
| /**********************************************************************/ |
| |
| #define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL) |
| #define EDGEFLAG_GET(idx) VB->EdgeFlag[idx] |
| #define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val |
| |
| |
| /* This does NOT include the CLIP_USER_BIT! */ |
| #define CLIPMASK (CLIP_FRUSTUM_BITS | CLIP_CULL_BIT) |
| |
| |
| /* Vertices, with the possibility of clipping. |
| */ |
| #define RENDER_POINTS( start, count ) \ |
| tnl->Driver.Render.Points( ctx, start, count ) |
| |
| #define RENDER_LINE( v1, v2 ) \ |
| do { \ |
| GLubyte c1 = mask[v1], c2 = mask[v2]; \ |
| GLubyte ormask = c1|c2; \ |
| if (!ormask) \ |
| LineFunc( ctx, v1, v2 ); \ |
| else if (!(c1 & c2 & CLIPMASK)) \ |
| clip_line_4( ctx, v1, v2, ormask ); \ |
| } while (0) |
| |
| #define RENDER_TRI( v1, v2, v3 ) \ |
| do { \ |
| GLubyte c1 = mask[v1], c2 = mask[v2], c3 = mask[v3]; \ |
| GLubyte ormask = c1|c2|c3; \ |
| if (!ormask) \ |
| TriangleFunc( ctx, v1, v2, v3 ); \ |
| else if (!(c1 & c2 & c3 & CLIPMASK)) \ |
| clip_tri_4( ctx, v1, v2, v3, ormask ); \ |
| } while (0) |
| |
| #define RENDER_QUAD( v1, v2, v3, v4 ) \ |
| do { \ |
| GLubyte c1 = mask[v1], c2 = mask[v2]; \ |
| GLubyte c3 = mask[v3], c4 = mask[v4]; \ |
| GLubyte ormask = c1|c2|c3|c4; \ |
| if (!ormask) \ |
| QuadFunc( ctx, v1, v2, v3, v4 ); \ |
| else if (!(c1 & c2 & c3 & c4 & CLIPMASK)) \ |
| clip_quad_4( ctx, v1, v2, v3, v4, ormask ); \ |
| } while (0) |
| |
| |
| #define LOCAL_VARS \ |
| TNLcontext *tnl = TNL_CONTEXT(ctx); \ |
| struct vertex_buffer *VB = &tnl->vb; \ |
| const GLuint * const elt = VB->Elts; \ |
| const GLubyte *mask = VB->ClipMask; \ |
| const GLuint sz = VB->ClipPtr->size; \ |
| const tnl_line_func LineFunc = tnl->Driver.Render.Line; \ |
| const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \ |
| const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \ |
| const GLboolean stipple = ctx->Line.StippleFlag; \ |
| (void) (LineFunc && TriangleFunc && QuadFunc); \ |
| (void) elt; (void) mask; (void) sz; (void) stipple; |
| |
| #define TAG(x) clip_##x##_verts |
| #define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x ) |
| #define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx ) |
| #define PRESERVE_VB_DEFS |
| #include "t_vb_rendertmp.h" |
| |
| |
| |
| /* Elts, with the possibility of clipping. |
| */ |
| #undef ELT |
| #undef TAG |
| #define ELT(x) elt[x] |
| #define TAG(x) clip_##x##_elts |
| #include "t_vb_rendertmp.h" |
| |
| /* TODO: do this for all primitives, verts and elts: |
| */ |
| static void clip_elt_triangles( struct gl_context *ctx, |
| GLuint start, |
| GLuint count, |
| GLuint flags ) |
| { |
| TNLcontext *tnl = TNL_CONTEXT(ctx); |
| tnl_render_func render_tris = tnl->Driver.Render.PrimTabElts[GL_TRIANGLES]; |
| struct vertex_buffer *VB = &tnl->vb; |
| const GLuint * const elt = VB->Elts; |
| GLubyte *mask = VB->ClipMask; |
| GLuint last = count-2; |
| GLuint j; |
| (void) flags; |
| |
| tnl->Driver.Render.PrimitiveNotify( ctx, GL_TRIANGLES ); |
| |
| for (j=start; j < last; j+=3 ) { |
| GLubyte c1 = mask[elt[j]]; |
| GLubyte c2 = mask[elt[j+1]]; |
| GLubyte c3 = mask[elt[j+2]]; |
| GLubyte ormask = c1|c2|c3; |
| if (ormask) { |
| if (start < j) |
| render_tris( ctx, start, j, 0 ); |
| if (!(c1&c2&c3&CLIPMASK)) |
| clip_tri_4( ctx, elt[j], elt[j+1], elt[j+2], ormask ); |
| start = j+3; |
| } |
| } |
| |
| if (start < j) |
| render_tris( ctx, start, j, 0 ); |
| } |
| |
| /**********************************************************************/ |
| /* Render whole begin/end objects */ |
| /**********************************************************************/ |
| |
| #define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL) |
| #define EDGEFLAG_GET(idx) VB->EdgeFlag[idx] |
| #define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val |
| |
| |
| /* Vertices, no clipping. |
| */ |
| #define RENDER_POINTS( start, count ) \ |
| tnl->Driver.Render.Points( ctx, start, count ) |
| |
| #define RENDER_LINE( v1, v2 ) \ |
| LineFunc( ctx, v1, v2 ) |
| |
| #define RENDER_TRI( v1, v2, v3 ) \ |
| TriangleFunc( ctx, v1, v2, v3 ) |
| |
| #define RENDER_QUAD( v1, v2, v3, v4 ) \ |
| QuadFunc( ctx, v1, v2, v3, v4 ) |
| |
| #define TAG(x) _tnl_##x##_verts |
| |
| #define LOCAL_VARS \ |
| TNLcontext *tnl = TNL_CONTEXT(ctx); \ |
| struct vertex_buffer *VB = &tnl->vb; \ |
| const GLuint * const elt = VB->Elts; \ |
| const tnl_line_func LineFunc = tnl->Driver.Render.Line; \ |
| const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \ |
| const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \ |
| const GLboolean stipple = ctx->Line.StippleFlag; \ |
| (void) (LineFunc && TriangleFunc && QuadFunc); \ |
| (void) elt; (void) stipple |
| |
| #define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx ) |
| #define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x ) |
| #define RENDER_TAB_QUALIFIER |
| #define PRESERVE_VB_DEFS |
| #include "t_vb_rendertmp.h" |
| |
| |
| /* Elts, no clipping. |
| */ |
| #undef ELT |
| #define TAG(x) _tnl_##x##_elts |
| #define ELT(x) elt[x] |
| #include "t_vb_rendertmp.h" |
| |
| |
| /**********************************************************************/ |
| /* Helper functions for drivers */ |
| /**********************************************************************/ |
| |
| void _tnl_RenderClippedPolygon( struct gl_context *ctx, const GLuint *elts, GLuint n ) |
| { |
| TNLcontext *tnl = TNL_CONTEXT(ctx); |
| struct vertex_buffer *VB = &tnl->vb; |
| GLuint *tmp = VB->Elts; |
| |
| VB->Elts = (GLuint *)elts; |
| tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END ); |
| VB->Elts = tmp; |
| } |
| |
| void _tnl_RenderClippedLine( struct gl_context *ctx, GLuint ii, GLuint jj ) |
| { |
| TNLcontext *tnl = TNL_CONTEXT(ctx); |
| tnl->Driver.Render.Line( ctx, ii, jj ); |
| } |
| |
| |
| |
| /**********************************************************************/ |
| /* Clip and render whole vertex buffers */ |
| /**********************************************************************/ |
| |
| |
| static GLboolean run_render( struct gl_context *ctx, |
| struct tnl_pipeline_stage *stage ) |
| { |
| TNLcontext *tnl = TNL_CONTEXT(ctx); |
| struct vertex_buffer *VB = &tnl->vb; |
| tnl_render_func *tab; |
| GLint pass = 0; |
| |
| /* Allow the drivers to lock before projected verts are built so |
| * that window coordinates are guarenteed not to change before |
| * rendering. |
| */ |
| assert(tnl->Driver.Render.Start); |
| |
| tnl->Driver.Render.Start( ctx ); |
| |
| assert(tnl->Driver.Render.BuildVertices); |
| assert(tnl->Driver.Render.PrimitiveNotify); |
| assert(tnl->Driver.Render.Points); |
| assert(tnl->Driver.Render.Line); |
| assert(tnl->Driver.Render.Triangle); |
| assert(tnl->Driver.Render.Quad); |
| assert(tnl->Driver.Render.ResetLineStipple); |
| assert(tnl->Driver.Render.Interp); |
| assert(tnl->Driver.Render.CopyPV); |
| assert(tnl->Driver.Render.ClippedLine); |
| assert(tnl->Driver.Render.ClippedPolygon); |
| assert(tnl->Driver.Render.Finish); |
| |
| tnl->Driver.Render.BuildVertices( ctx, 0, VB->Count, ~0 ); |
| |
| if (VB->ClipOrMask) { |
| tab = VB->Elts ? clip_render_tab_elts : clip_render_tab_verts; |
| clip_render_tab_elts[GL_TRIANGLES] = clip_elt_triangles; |
| } |
| else { |
| tab = (VB->Elts ? |
| tnl->Driver.Render.PrimTabElts : |
| tnl->Driver.Render.PrimTabVerts); |
| } |
| |
| do |
| { |
| GLuint i; |
| |
| for (i = 0 ; i < VB->PrimitiveCount ; i++) |
| { |
| GLuint prim = _tnl_translate_prim(&VB->Primitive[i]); |
| GLuint start = VB->Primitive[i].start; |
| GLuint length = VB->Primitive[i].count; |
| |
| assert((prim & PRIM_MODE_MASK) <= GL_POLYGON); |
| |
| if (MESA_VERBOSE & VERBOSE_PRIMS) |
| _mesa_debug(NULL, "MESA prim %s %d..%d\n", |
| _mesa_enum_to_string(prim & PRIM_MODE_MASK), |
| start, start+length); |
| |
| if (length) |
| tab[prim & PRIM_MODE_MASK]( ctx, start, start + length, prim ); |
| } |
| } while (tnl->Driver.Render.Multipass && |
| tnl->Driver.Render.Multipass( ctx, ++pass )); |
| |
| tnl->Driver.Render.Finish( ctx ); |
| |
| return GL_FALSE; /* finished the pipe */ |
| } |
| |
| |
| /**********************************************************************/ |
| /* Render pipeline stage */ |
| /**********************************************************************/ |
| |
| |
| |
| |
| |
| const struct tnl_pipeline_stage _tnl_render_stage = |
| { |
| "render", /* name */ |
| NULL, /* private data */ |
| NULL, /* creator */ |
| NULL, /* destructor */ |
| NULL, /* validate */ |
| run_render /* run */ |
| }; |