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Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/mga/mgatris.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/drivers/dri/mga/mgatris.c912
1 files changed, 912 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/mga/mgatris.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/mga/mgatris.c
new file mode 100644
index 000000000..2b7ea05b1
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/mga/mgatris.c
@@ -0,0 +1,912 @@
+/*
+ * Copyright 2000-2001 VA Linux Systems, Inc.
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 (including the next
+ * paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 <keith@tungstengraphics.com>
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgatris.c,v 1.10 2002/10/30 12:51:36 alanh Exp $ */
+
+#include "mtypes.h"
+#include "macros.h"
+#include "colormac.h"
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+
+#include "mm.h"
+#include "mgacontext.h"
+#include "mgaioctl.h"
+#include "mgatris.h"
+#include "mgavb.h"
+#include "mgastate.h"
+
+
+static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim );
+
+/***********************************************************************
+ * Functions to draw basic primitives *
+ ***********************************************************************/
+
+
+#if defined (USE_X86_ASM)
+#define EMIT_VERT( j, vb, vertex_size, v ) \
+do { int __tmp; \
+ __asm__ __volatile__( "rep ; movsl" \
+ : "=%c" (j), "=D" (vb), "=S" (__tmp) \
+ : "0" (vertex_size), \
+ "D" ((long)vb), \
+ "S" ((long)v)); \
+} while (0)
+#else
+#define EMIT_VERT( j, vb, vertex_size, v ) \
+do { \
+ for ( j = 0 ; j < vertex_size ; j++ ) \
+ vb[j] = (v)->ui[j]; \
+ vb += vertex_size; \
+} while (0)
+#endif
+
+static void __inline__ mga_draw_triangle( mgaContextPtr mmesa,
+ mgaVertexPtr v0,
+ mgaVertexPtr v1,
+ mgaVertexPtr v2 )
+{
+ GLuint vertex_size = mmesa->vertex_size;
+ GLuint *vb = mgaAllocDmaLow( mmesa, 3 * 4 * vertex_size );
+ int j;
+
+ EMIT_VERT( j, vb, vertex_size, v0 );
+ EMIT_VERT( j, vb, vertex_size, v1 );
+ EMIT_VERT( j, vb, vertex_size, v2 );
+}
+
+
+static void __inline__ mga_draw_quad( mgaContextPtr mmesa,
+ mgaVertexPtr v0,
+ mgaVertexPtr v1,
+ mgaVertexPtr v2,
+ mgaVertexPtr v3 )
+{
+ GLuint vertex_size = mmesa->vertex_size;
+ GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
+ int j;
+
+ EMIT_VERT( j, vb, vertex_size, v0 );
+ EMIT_VERT( j, vb, vertex_size, v1 );
+ EMIT_VERT( j, vb, vertex_size, v3 );
+ EMIT_VERT( j, vb, vertex_size, v1 );
+ EMIT_VERT( j, vb, vertex_size, v2 );
+ EMIT_VERT( j, vb, vertex_size, v3 );
+}
+
+
+static __inline__ void mga_draw_point( mgaContextPtr mmesa,
+ mgaVertexPtr tmp )
+{
+ GLfloat sz = mmesa->glCtx->Point._Size * .5;
+ int vertex_size = mmesa->vertex_size;
+ GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
+ int j;
+
+#if 0
+ v0->v.x += PNT_X_OFFSET - TRI_X_OFFSET;
+ v0->v.y += PNT_Y_OFFSET - TRI_Y_OFFSET;
+#endif
+
+ /* Draw a point as two triangles.
+ */
+ *(float *)&vb[0] = tmp->v.x - sz;
+ *(float *)&vb[1] = tmp->v.y - sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = tmp->v.x + sz;
+ *(float *)&vb[1] = tmp->v.y - sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = tmp->v.x + sz;
+ *(float *)&vb[1] = tmp->v.y + sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = tmp->v.x + sz;
+ *(float *)&vb[1] = tmp->v.y + sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = tmp->v.x - sz;
+ *(float *)&vb[1] = tmp->v.y + sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = tmp->v.x - sz;
+ *(float *)&vb[1] = tmp->v.y - sz;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = tmp->ui[j];
+
+#if 0
+ v0->v.x -= PNT_X_OFFSET - TRI_X_OFFSET;
+ v0->v.y -= PNT_Y_OFFSET - TRI_Y_OFFSET;
+#endif
+}
+
+
+static __inline__ void mga_draw_line( mgaContextPtr mmesa,
+ mgaVertexPtr v0,
+ mgaVertexPtr v1 )
+{
+ GLuint vertex_size = mmesa->vertex_size;
+ GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
+ GLfloat dx, dy, ix, iy;
+ GLfloat width = mmesa->glCtx->Line._Width;
+ GLint j;
+
+#if 0
+ v0->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
+ v0->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
+ v1->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
+ v1->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
+#endif
+
+ dx = v0->v.x - v1->v.x;
+ dy = v0->v.y - v1->v.y;
+
+ ix = width * .5; iy = 0;
+ if (dx * dx > dy * dy) {
+ iy = ix; ix = 0;
+ }
+
+ *(float *)&vb[0] = v0->v.x - ix;
+ *(float *)&vb[1] = v0->v.y - iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v0->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = v1->v.x + ix;
+ *(float *)&vb[1] = v1->v.y + iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v1->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = v0->v.x + ix;
+ *(float *)&vb[1] = v0->v.y + iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v0->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = v0->v.x - ix;
+ *(float *)&vb[1] = v0->v.y - iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v0->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = v1->v.x - ix;
+ *(float *)&vb[1] = v1->v.y - iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v1->ui[j];
+ vb += vertex_size;
+
+ *(float *)&vb[0] = v1->v.x + ix;
+ *(float *)&vb[1] = v1->v.y + iy;
+ for (j = 2 ; j < vertex_size ; j++)
+ vb[j] = v1->ui[j];
+ vb += vertex_size;
+
+#if 0
+ v0->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
+ v0->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
+ v1->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
+ v1->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
+#endif
+}
+
+/***********************************************************************
+ * Macros for t_dd_tritmp.h to draw basic primitives *
+ ***********************************************************************/
+
+#define TRI( a, b, c ) \
+do { \
+ if (DO_FALLBACK) \
+ mmesa->draw_tri( mmesa, a, b, c ); \
+ else \
+ mga_draw_triangle( mmesa, a, b, c ); \
+} while (0)
+
+#define QUAD( a, b, c, d ) \
+do { \
+ if (DO_FALLBACK) { \
+ mmesa->draw_tri( mmesa, a, b, d ); \
+ mmesa->draw_tri( mmesa, b, c, d ); \
+ } else { \
+ mga_draw_quad( mmesa, a, b, c, d ); \
+ } \
+} while (0)
+
+#define LINE( v0, v1 ) \
+do { \
+ if (DO_FALLBACK) \
+ mmesa->draw_line( mmesa, v0, v1 ); \
+ else { \
+ mga_draw_line( mmesa, v0, v1 ); \
+ } \
+} while (0)
+
+#define POINT( v0 ) \
+do { \
+ if (DO_FALLBACK) \
+ mmesa->draw_point( mmesa, v0 ); \
+ else { \
+ mga_draw_point( mmesa, v0 ); \
+ } \
+} while (0)
+
+
+/***********************************************************************
+ * Fallback to swrast for basic primitives *
+ ***********************************************************************/
+
+/* This code is hit only when a mix of accelerated and unaccelerated
+ * primitives are being drawn, and only for the unaccelerated
+ * primitives.
+ */
+
+static void
+mga_fallback_tri( mgaContextPtr mmesa,
+ mgaVertex *v0,
+ mgaVertex *v1,
+ mgaVertex *v2 )
+{
+ GLcontext *ctx = mmesa->glCtx;
+ SWvertex v[3];
+ mga_translate_vertex( ctx, v0, &v[0] );
+ mga_translate_vertex( ctx, v1, &v[1] );
+ mga_translate_vertex( ctx, v2, &v[2] );
+ _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
+}
+
+
+static void
+mga_fallback_line( mgaContextPtr mmesa,
+ mgaVertex *v0,
+ mgaVertex *v1 )
+{
+ GLcontext *ctx = mmesa->glCtx;
+ SWvertex v[2];
+ mga_translate_vertex( ctx, v0, &v[0] );
+ mga_translate_vertex( ctx, v1, &v[1] );
+ _swrast_Line( ctx, &v[0], &v[1] );
+}
+
+
+static void
+mga_fallback_point( mgaContextPtr mmesa,
+ mgaVertex *v0 )
+{
+ GLcontext *ctx = mmesa->glCtx;
+ SWvertex v[1];
+ mga_translate_vertex( ctx, v0, &v[0] );
+ _swrast_Point( ctx, &v[0] );
+}
+
+/***********************************************************************
+ * Build render functions from dd templates *
+ ***********************************************************************/
+
+
+#define MGA_UNFILLED_BIT 0x1
+#define MGA_OFFSET_BIT 0x2
+#define MGA_TWOSIDE_BIT 0x4
+#define MGA_FLAT_BIT 0x8 /* mga can't flatshade? */
+#define MGA_FALLBACK_BIT 0x10
+#define MGA_MAX_TRIFUNC 0x20
+
+static struct {
+ tnl_points_func points;
+ tnl_line_func line;
+ tnl_triangle_func triangle;
+ tnl_quad_func quad;
+} rast_tab[MGA_MAX_TRIFUNC];
+
+#define DO_FALLBACK (IND & MGA_FALLBACK_BIT)
+#define DO_OFFSET (IND & MGA_OFFSET_BIT)
+#define DO_UNFILLED (IND & MGA_UNFILLED_BIT)
+#define DO_TWOSIDE (IND & MGA_TWOSIDE_BIT)
+#define DO_FLAT (IND & MGA_FLAT_BIT)
+#define DO_TRI 1
+#define DO_QUAD 1
+#define DO_LINE 1
+#define DO_POINTS 1
+#define DO_FULL_QUAD 1
+
+#define HAVE_RGBA 1
+#define HAVE_BACK_COLORS 0
+#define HAVE_SPEC 1
+#define HAVE_HW_FLATSHADE 0
+#define VERTEX mgaVertex
+#define TAB rast_tab
+
+
+#define DEPTH_SCALE mmesa->depth_scale
+#define UNFILLED_TRI unfilled_tri
+#define UNFILLED_QUAD unfilled_quad
+#define VERT_X(_v) _v->v.x
+#define VERT_Y(_v) _v->v.y
+#define VERT_Z(_v) _v->v.z
+#define AREA_IS_CCW( a ) (a > 0)
+#define GET_VERTEX(e) (mmesa->verts + (e * mmesa->vertex_size * sizeof(int)))
+
+#define VERT_SET_RGBA( v, c ) \
+do { \
+ mga_color_t *color = (mga_color_t *)&((v)->ui[4]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(color->red, (c)[0]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(color->green, (c)[1]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(color->blue, (c)[2]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(color->alpha, (c)[3]); \
+} while (0)
+
+#define VERT_COPY_RGBA( v0, v1 ) v0->ui[4] = v1->ui[4]
+
+#define VERT_SET_SPEC( v0, c ) \
+do { \
+ UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.red, (c)[0]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.green, (c)[1]); \
+ UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.blue, (c)[2]); \
+} while (0)
+
+#define VERT_COPY_SPEC( v0, v1 ) \
+do { \
+ v0->v.specular.red = v1->v.specular.red; \
+ v0->v.specular.green = v1->v.specular.green; \
+ v0->v.specular.blue = v1->v.specular.blue; \
+} while (0)
+
+#define VERT_SAVE_RGBA( idx ) color[idx] = v[idx]->ui[4]
+#define VERT_RESTORE_RGBA( idx ) v[idx]->ui[4] = color[idx]
+#define VERT_SAVE_SPEC( idx ) spec[idx] = v[idx]->ui[5]
+#define VERT_RESTORE_SPEC( idx ) v[idx]->ui[5] = spec[idx]
+
+#define LOCAL_VARS(n) \
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx); \
+ GLuint color[n], spec[n]; \
+ (void) color; (void) spec;
+
+
+
+/***********************************************************************
+ * Functions to draw basic unfilled primitives *
+ ***********************************************************************/
+
+#define RASTERIZE(x) if (mmesa->raster_primitive != x) \
+ mgaRasterPrimitive( ctx, x, MGA_WA_TRIANGLES )
+#define RENDER_PRIMITIVE mmesa->render_primitive
+#define IND MGA_FALLBACK_BIT
+#define TAG(x) x
+#include "tnl_dd/t_dd_unfilled.h"
+#undef IND
+
+/***********************************************************************
+ * Functions to draw GL primitives *
+ ***********************************************************************/
+
+#define IND (0)
+#define TAG(x) x
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT)
+#define TAG(x) x##_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT)
+#define TAG(x) x##_twoside
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT)
+#define TAG(x) x##_twoside_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_UNFILLED_BIT)
+#define TAG(x) x##_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
+#define TAG(x) x##_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT)
+#define TAG(x) x##_twoside_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
+#define TAG(x) x##_twoside_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_FALLBACK_BIT)
+#define TAG(x) x##_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_twoside_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_offset_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
+#define TAG(x) x##_twoside_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
+ MGA_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+
+/* Mga doesn't support provoking-vertex flat-shading?
+ */
+#define IND (MGA_FLAT_BIT)
+#define TAG(x) x##_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_offset_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_UNFILLED_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_offset_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_offset_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_offset_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
+ MGA_FALLBACK_BIT|MGA_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+
+static void init_rast_tab( void )
+{
+ init();
+ init_offset();
+ init_twoside();
+ init_twoside_offset();
+ init_unfilled();
+ init_offset_unfilled();
+ init_twoside_unfilled();
+ init_twoside_offset_unfilled();
+ init_fallback();
+ init_offset_fallback();
+ init_twoside_fallback();
+ init_twoside_offset_fallback();
+ init_unfilled_fallback();
+ init_offset_unfilled_fallback();
+ init_twoside_unfilled_fallback();
+ init_twoside_offset_unfilled_fallback();
+
+ init_flat();
+ init_offset_flat();
+ init_twoside_flat();
+ init_twoside_offset_flat();
+ init_unfilled_flat();
+ init_offset_unfilled_flat();
+ init_twoside_unfilled_flat();
+ init_twoside_offset_unfilled_flat();
+ init_fallback_flat();
+ init_offset_fallback_flat();
+ init_twoside_fallback_flat();
+ init_twoside_offset_fallback_flat();
+ init_unfilled_fallback_flat();
+ init_offset_unfilled_fallback_flat();
+ init_twoside_unfilled_fallback_flat();
+ init_twoside_offset_unfilled_fallback_flat();
+}
+
+/**********************************************************************/
+/* Render whole begin/end objects */
+/**********************************************************************/
+
+
+#define VERT(x) (mgaVertex *)(vertptr + ((x)*vertex_size*sizeof(int)))
+#define RENDER_POINTS( start, count ) \
+ for ( ; start < count ; start++) \
+ mga_draw_point( mmesa, VERT(ELT(start)) );
+#define RENDER_LINE( v0, v1 ) \
+ mga_draw_line( mmesa, VERT(v0), VERT(v1) )
+#define RENDER_TRI( v0, v1, v2 ) \
+ mga_draw_triangle( mmesa, VERT(v0), VERT(v1), VERT(v2) )
+#define RENDER_QUAD( v0, v1, v2, v3 ) \
+ mga_draw_quad( mmesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) )
+#define INIT(x) mgaRenderPrimitive( ctx, x )
+#undef LOCAL_VARS
+#define LOCAL_VARS \
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx); \
+ GLubyte *vertptr = (GLubyte *)mmesa->verts; \
+ const GLuint vertex_size = mmesa->vertex_size; \
+ const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts; \
+ (void) elt;
+#define RESET_STIPPLE
+#define RESET_OCCLUSION
+#define PRESERVE_VB_DEFS
+#define ELT(x) x
+#define TAG(x) mga_##x##_verts
+#include "tnl/t_vb_rendertmp.h"
+#undef ELT
+#undef TAG
+#define TAG(x) mga_##x##_elts
+#define ELT(x) elt[x]
+#include "tnl/t_vb_rendertmp.h"
+
+
+/**********************************************************************/
+/* Render clipped primitives */
+/**********************************************************************/
+
+
+
+static void mgaRenderClippedPoly( GLcontext *ctx, const GLuint *elts, GLuint n )
+{
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ GLuint prim = mmesa->render_primitive;
+
+ /* Render the new vertices as an unclipped polygon.
+ */
+ {
+ GLuint *tmp = VB->Elts;
+ VB->Elts = (GLuint *)elts;
+ tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
+ VB->Elts = tmp;
+ }
+
+ /* Restore the render primitive
+ */
+ if (prim != GL_POLYGON)
+ tnl->Driver.Render.PrimitiveNotify( ctx, prim );
+}
+
+static void mgaRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ tnl->Driver.Render.Line( ctx, ii, jj );
+}
+
+static void mgaFastRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
+ GLuint n )
+{
+ mgaContextPtr mmesa = MGA_CONTEXT( ctx );
+ GLuint vertex_size = mmesa->vertex_size;
+ GLuint *vb = mgaAllocDmaLow( mmesa, (n-2) * 3 * 4 * vertex_size );
+ GLubyte *vertptr = (GLubyte *)mmesa->verts;
+ const GLuint *start = (const GLuint *)VERT(elts[0]);
+ int i,j;
+
+ for (i = 2 ; i < n ; i++) {
+ EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i-1]) );
+ EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i]) );
+ EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) start );
+ }
+}
+
+/**********************************************************************/
+/* Choose render functions */
+/**********************************************************************/
+
+
+#define POINT_FALLBACK (DD_POINT_SMOOTH)
+#define LINE_FALLBACK (DD_LINE_SMOOTH | DD_LINE_STIPPLE)
+#define TRI_FALLBACK (DD_TRI_SMOOTH | DD_TRI_UNFILLED)
+#define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)
+#define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET| \
+ DD_TRI_UNFILLED)
+
+void mgaChooseRenderState(GLcontext *ctx)
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+ GLuint flags = ctx->_TriangleCaps;
+ GLuint index = 0;
+
+ if (flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS|DD_TRI_STIPPLE)) {
+ if (flags & ANY_RASTER_FLAGS) {
+ if (flags & DD_TRI_LIGHT_TWOSIDE) index |= MGA_TWOSIDE_BIT;
+ if (flags & DD_TRI_OFFSET) index |= MGA_OFFSET_BIT;
+ if (flags & DD_TRI_UNFILLED) index |= MGA_UNFILLED_BIT;
+ if (flags & DD_FLATSHADE) index |= MGA_FLAT_BIT;
+ }
+
+ mmesa->draw_point = mga_draw_point;
+ mmesa->draw_line = mga_draw_line;
+ mmesa->draw_tri = mga_draw_triangle;
+
+ /* Hook in fallbacks for specific primitives.
+ */
+ if (flags & ANY_FALLBACK_FLAGS)
+ {
+ if (flags & POINT_FALLBACK)
+ mmesa->draw_point = mga_fallback_point;
+
+ if (flags & LINE_FALLBACK)
+ mmesa->draw_line = mga_fallback_line;
+
+ if (flags & TRI_FALLBACK)
+ mmesa->draw_tri = mga_fallback_tri;
+
+ index |= MGA_FALLBACK_BIT;
+ }
+
+ if ((flags & DD_TRI_STIPPLE) && !mmesa->haveHwStipple) {
+ mmesa->draw_tri = mga_fallback_tri;
+ index |= MGA_FALLBACK_BIT;
+ }
+ }
+
+ if (mmesa->RenderIndex != index) {
+ mmesa->RenderIndex = index;
+
+ tnl->Driver.Render.Points = rast_tab[index].points;
+ tnl->Driver.Render.Line = rast_tab[index].line;
+ tnl->Driver.Render.Triangle = rast_tab[index].triangle;
+ tnl->Driver.Render.Quad = rast_tab[index].quad;
+
+ if (index == 0) {
+ tnl->Driver.Render.PrimTabVerts = mga_render_tab_verts;
+ tnl->Driver.Render.PrimTabElts = mga_render_tab_elts;
+ tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
+ tnl->Driver.Render.ClippedPolygon = mgaFastRenderClippedPoly;
+ } else {
+ tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
+ tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
+ tnl->Driver.Render.ClippedLine = mgaRenderClippedLine;
+ tnl->Driver.Render.ClippedPolygon = mgaRenderClippedPoly;
+ }
+ }
+}
+
+/**********************************************************************/
+/* Runtime render state and callbacks */
+/**********************************************************************/
+
+
+static GLenum reduced_prim[GL_POLYGON+1] = {
+ GL_POINTS,
+ GL_LINES,
+ GL_LINES,
+ GL_LINES,
+ GL_TRIANGLES,
+ GL_TRIANGLES,
+ GL_TRIANGLES,
+ GL_TRIANGLES,
+ GL_TRIANGLES,
+ GL_TRIANGLES
+};
+
+
+
+/* Always called between RenderStart and RenderFinish --> We already
+ * hold the lock.
+ */
+void mgaRasterPrimitive( GLcontext *ctx, GLenum prim, GLuint hwprim )
+{
+ mgaContextPtr mmesa = MGA_CONTEXT( ctx );
+
+ FLUSH_BATCH( mmesa );
+
+ /* Update culling */
+ if (mmesa->raster_primitive != prim)
+ mmesa->dirty |= MGA_UPLOAD_CONTEXT;
+
+ mmesa->raster_primitive = prim;
+/* mmesa->hw_primitive = hwprim; */
+ mmesa->hw_primitive = MGA_WA_TRIANGLES; /* disable mgarender.c for now */
+
+ if (ctx->Polygon.StippleFlag && mmesa->haveHwStipple)
+ {
+ mmesa->dirty |= MGA_UPLOAD_CONTEXT;
+ mmesa->setup.dwgctl &= ~(0xf<<20);
+ if (mmesa->raster_primitive == GL_TRIANGLES)
+ mmesa->setup.dwgctl |= mmesa->poly_stipple;
+ }
+}
+
+
+
+/* Determine the rasterized primitive when not drawing unfilled
+ * polygons.
+ *
+ * Used only for the default render stage which always decomposes
+ * primitives to trianges/lines/points. For the accelerated stage,
+ * which renders strips as strips, the equivalent calculations are
+ * performed in mgarender.c.
+ */
+static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim )
+{
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+ GLuint rprim = reduced_prim[prim];
+
+ mmesa->render_primitive = prim;
+
+ if (rprim == GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
+ return;
+
+ if (mmesa->raster_primitive != rprim) {
+ mgaRasterPrimitive( ctx, rprim, MGA_WA_TRIANGLES );
+ }
+}
+
+static void mgaRenderFinish( GLcontext *ctx )
+{
+ if (MGA_CONTEXT(ctx)->RenderIndex & MGA_FALLBACK_BIT)
+ _swrast_flush( ctx );
+}
+
+
+
+/**********************************************************************/
+/* Manage total rasterization fallbacks */
+/**********************************************************************/
+
+static const char * const fallbackStrings[] = {
+ "Texture mode",
+ "glDrawBuffer(GL_FRONT_AND_BACK)",
+ "read buffer",
+ "glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ZERO)",
+ "glRenderMode(selection or feedback)",
+ "No hardware stencil",
+ "glDepthFunc( GL_NEVER )",
+ "Mixing GL_CLAMP_TO_EDGE and GL_CLAMP",
+ "rasterization fallback option"
+};
+
+static const char *getFallbackString(GLuint bit)
+{
+ int i = 0;
+ while (bit > 1) {
+ i++;
+ bit >>= 1;
+ }
+ return fallbackStrings[i];
+}
+
+
+void mgaFallback( GLcontext *ctx, GLuint bit, GLboolean mode )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+ GLuint oldfallback = mmesa->Fallback;
+
+ if (mode) {
+ mmesa->Fallback |= bit;
+ if (oldfallback == 0) {
+ FLUSH_BATCH(mmesa);
+ _swsetup_Wakeup( ctx );
+ mmesa->RenderIndex = ~0;
+ if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
+ fprintf(stderr, "MGA begin rasterization fallback: 0x%x %s\n",
+ bit, getFallbackString(bit));
+ }
+ }
+ }
+ else {
+ mmesa->Fallback &= ~bit;
+ if (oldfallback == bit) {
+ _swrast_flush( ctx );
+ tnl->Driver.Render.Start = mgaCheckTexSizes;
+ tnl->Driver.Render.PrimitiveNotify = mgaRenderPrimitive;
+ tnl->Driver.Render.Finish = mgaRenderFinish;
+ tnl->Driver.Render.BuildVertices = mgaBuildVertices;
+ mmesa->NewGLState |= (_MGA_NEW_RENDERSTATE |
+ _MGA_NEW_RASTERSETUP);
+ if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
+ fprintf(stderr, "MGA end rasterization fallback: 0x%x %s\n",
+ bit, getFallbackString(bit));
+ }
+ }
+ }
+}
+
+
+void mgaDDInitTriFuncs( GLcontext *ctx )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+ static int firsttime = 1;
+ if (firsttime) {
+ init_rast_tab();
+ firsttime = 0;
+ }
+
+ mmesa->RenderIndex = ~0;
+
+ tnl->Driver.Render.Start = mgaCheckTexSizes;
+ tnl->Driver.Render.Finish = mgaRenderFinish;
+ tnl->Driver.Render.PrimitiveNotify = mgaRenderPrimitive;
+ tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
+ tnl->Driver.Render.BuildVertices = mgaBuildVertices;
+ tnl->Driver.Render.Multipass = NULL;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 06:42:15 +0000