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-rw-r--r--xc/extras/Mesa/src/tnl/t_vb_render.c417
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diff --git a/xc/extras/Mesa/src/tnl/t_vb_render.c b/xc/extras/Mesa/src/tnl/t_vb_render.c
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+/* $Id: t_vb_render.c,v 1.2 2002/02/14 01:59:42 dawes Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 4.0.1
+ *
+ * Copyright (C) 1999-2001 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.
+ *
+ * Authors:
+ * Keith Whitwell <keithw@valinux.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 "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "mem.h"
+#include "mtypes.h"
+#include "mmath.h"
+
+#include "math/m_matrix.h"
+#include "math/m_xform.h"
+
+#include "t_pipeline.h"
+
+
+
+/**********************************************************************/
+/* Clip single primitives */
+/**********************************************************************/
+
+
+#if defined(USE_IEEE)
+#define NEGATIVE(x) (GET_FLOAT_BITS(x) & (1<<31))
+#define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
+#else
+#define NEGATIVE(x) (x < 0)
+#define DIFFERENT_SIGNS(x,y) (x * y <= 0 && x - y != 0)
+/* Could just use (x*y<0) except for the flatshading requirements.
+ * Maybe there's a better way?
+ */
+#endif
+
+
+#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->_TriangleCaps & DD_TRI_UNFILLED)
+#define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
+#define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
+
+
+/* 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 & 0x3f)) \
+ 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 & 0x3f)) \
+ 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 & 0x3f)) \
+ 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 line_func LineFunc = tnl->Driver.Render.Line; \
+ const triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
+ const 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 RESET_OCCLUSION ctx->OcclusionResult = GL_TRUE
+#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( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ 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&0x3f))
+ 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->_TriangleCaps & DD_TRI_UNFILLED)
+#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 line_func LineFunc = tnl->Driver.Render.Line; \
+ const triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
+ const 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 RESET_OCCLUSION ctx->OcclusionResult = GL_TRUE
+#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( GLcontext *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( GLcontext *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( GLcontext *ctx,
+ struct gl_pipeline_stage *stage )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ GLuint new_inputs = stage->changed_inputs;
+ 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, new_inputs );
+
+ 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, length, flags = 0;
+ for (i = VB->FirstPrimitive ; !(flags & PRIM_LAST) ; i += length)
+ {
+ flags = VB->Primitive[i];
+ length= VB->PrimitiveLength[i];
+ ASSERT(length || (flags & PRIM_LAST));
+ ASSERT((flags & PRIM_MODE_MASK) <= GL_POLYGON+1);
+ if (length)
+ tab[flags & PRIM_MODE_MASK]( ctx, i, i + length, flags );
+ }
+ } while (tnl->Driver.Render.Multipass &&
+ tnl->Driver.Render.Multipass( ctx, ++pass ));
+
+
+ tnl->Driver.Render.Finish( ctx );
+/* _swrast_flush(ctx); */
+/* usleep(1000000); */
+ return GL_FALSE; /* finished the pipe */
+}
+
+
+/**********************************************************************/
+/* Render pipeline stage */
+/**********************************************************************/
+
+
+
+/* Quite a bit of work involved in finding out the inputs for the
+ * render stage.
+ */
+static void check_render( GLcontext *ctx, struct gl_pipeline_stage *stage )
+{
+ GLuint inputs = VERT_CLIP;
+ GLuint i;
+
+ if (ctx->Visual.rgbMode) {
+ inputs |= VERT_RGBA;
+
+ if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR)
+ inputs |= VERT_SPEC_RGB;
+
+ if (ctx->Texture._ReallyEnabled) {
+ for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++) {
+ if (ctx->Texture.Unit[i]._ReallyEnabled)
+ inputs |= VERT_TEX(i);
+ }
+ }
+ }
+ else {
+ inputs |= VERT_INDEX;
+ }
+
+ if (ctx->Point._Attenuated)
+ inputs |= VERT_POINT_SIZE;
+
+ /* How do drivers turn this off?
+ */
+ if (ctx->Fog.Enabled)
+ inputs |= VERT_FOG_COORD;
+
+ if (ctx->_TriangleCaps & DD_TRI_UNFILLED)
+ inputs |= VERT_EDGE;
+
+ if (ctx->RenderMode==GL_FEEDBACK)
+ inputs |= VERT_TEX_ANY;
+
+ stage->inputs = inputs;
+}
+
+
+
+
+static void dtr( struct gl_pipeline_stage *stage )
+{
+}
+
+
+const struct gl_pipeline_stage _tnl_render_stage =
+{
+ "render",
+ (_NEW_BUFFERS |
+ _DD_NEW_SEPARATE_SPECULAR |
+ _DD_NEW_FLATSHADE |
+ _NEW_TEXTURE|
+ _NEW_LIGHT|
+ _NEW_POINT|
+ _NEW_FOG|
+ _DD_NEW_TRI_UNFILLED |
+ _NEW_RENDERMODE), /* re-check (new inputs, interp function) */
+ 0, /* re-run (always runs) */
+ GL_TRUE, /* active */
+ 0, 0, /* inputs (set in check_render), outputs */
+ 0, 0, /* changed_inputs, private */
+ dtr, /* destructor */
+ check_render, /* check */
+ run_render /* run */
+};
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