diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c new file mode 100644 index 000000000..b0592e9cd --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c @@ -0,0 +1,226 @@ +/* + * Intel i810 DRI driver for Mesa 3.5 + * + * Copyright (C) 1999-2000 Keith Whitwell 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 KEITH WHITWELL 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. + * + * Author: + * Keith Whitwell <keith@tungstengraphics.com> + * Adapted for use on the I830: + * Jeff Hartmann <jhartmann@2d3d.com> + */ +/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_render.c,v 1.2 2002/12/10 01:26:53 dawes Exp $ */ + +/* + * Render unclipped vertex buffers by emitting vertices directly to + * dma buffers. Use strip/fan hardware acceleration where possible. + * + */ +#include "glheader.h" +#include "context.h" +#include "macros.h" +#include "imports.h" +#include "mtypes.h" +#include "enums.h" + +#include "tnl/t_context.h" + +#include "i830_screen.h" +#include "i830_dri.h" + +#include "i830_context.h" +#include "i830_tris.h" +#include "i830_state.h" +#include "i830_ioctl.h" + +/* + * Render unclipped vertex buffers by emitting vertices directly to + * dma buffers. Use strip/fan hardware primitives where possible. + * Try to simulate missing primitives with indexed vertices. + */ +#define HAVE_POINTS 0 /* Has it, but can't use because subpixel has to + * be adjusted for points on the I830/I845G + */ +#define HAVE_LINES 1 +#define HAVE_LINE_STRIPS 1 +#define HAVE_TRIANGLES 1 +#define HAVE_TRI_STRIPS 1 +#define HAVE_TRI_STRIP_1 0 /* has it, template can't use it yet */ +#define HAVE_TRI_FANS 1 +#define HAVE_POLYGONS 1 +#define HAVE_QUADS 0 +#define HAVE_QUAD_STRIPS 0 + +#define HAVE_ELTS 0 + +static GLuint hw_prim[GL_POLYGON+1] = { + 0, + PRIM3D_LINELIST, + PRIM3D_LINESTRIP, + PRIM3D_LINESTRIP, + PRIM3D_TRILIST, + PRIM3D_TRISTRIP, + PRIM3D_TRIFAN, + 0, + 0, + PRIM3D_POLY +}; + +static const 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 +}; + +static const int scale_prim[GL_POLYGON+1] = { + 0, /* fallback case */ + 1, + 2, + 2, + 1, + 3, + 3, + 0, /* fallback case */ + 0, /* fallback case */ + 3 +}; + + +#define LOCAL_VARS i830ContextPtr imesa = I830_CONTEXT(ctx) +#define INIT( prim ) do { \ + I830_STATECHANGE(imesa, 0); \ + i830RasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] ); \ +} while (0) + +#define FLUSH() I830_FIREVERTICES( imesa ) +#define GET_CURRENT_VB_MAX_VERTS() \ + (((int)imesa->vertex_high - (int)imesa->vertex_low) / (imesa->vertex_size*4)) +#define GET_SUBSEQUENT_VB_MAX_VERTS() \ + (I830_DMA_BUF_SZ-8) / (imesa->vertex_size * 4) + + +#define ALLOC_VERTS( nr ) \ + i830AllocDmaLow( imesa, (nr) * imesa->vertex_size * 4) +#define EMIT_VERTS( ctx, j, nr, buf ) \ + _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf) + +#define TAG(x) i830_##x +#include "tnl_dd/t_dd_dmatmp.h" + + +/**********************************************************************/ +/* Render pipeline stage */ +/**********************************************************************/ + +/* Heuristic for i830, which can only emit a single primitive per dma + * buffer, and has only a small number of dma buffers. + */ +static GLboolean choose_render( struct vertex_buffer *VB, int bufsz ) +{ + int nr_prims = 0; + int nr_rprims = 0; + int nr_rverts = 0; + int rprim = 0; + int i; + + + for (i = 0 ; i < VB->PrimitiveCount ; i++) + { + GLuint prim = VB->Primitive[i].mode; + GLuint length = VB->Primitive[i].count; + + if (!length) + continue; + + if (!hw_prim[prim & PRIM_MODE_MASK]) + return GL_FALSE; + + nr_prims++; + nr_rverts += length * scale_prim[prim & PRIM_MODE_MASK]; + + if (reduced_prim[prim&PRIM_MODE_MASK] != rprim) { + nr_rprims++; + rprim = reduced_prim[prim&PRIM_MODE_MASK]; + } + } + + nr_prims += i / bufsz; + nr_rprims += nr_rverts / bufsz; + + if ((nr_prims > nr_rprims * 2) || + (nr_prims > nr_rprims + 3)) + return GL_FALSE; + + return GL_TRUE; +} + + +static GLboolean i830_run_render( GLcontext *ctx, + struct tnl_pipeline_stage *stage ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct vertex_buffer *VB = &tnl->vb; + GLuint i; + /* Don't handle clipping or indexed vertices. + */ + if (imesa->RenderIndex != 0 || + !i830_validate_render( ctx, VB ) || + !choose_render( VB, 200 )) { /* 200 is estimate of nr verts/buf */ + return GL_TRUE; + } + + tnl->Driver.Render.Start( ctx ); + + for (i = 0 ; i < VB->PrimitiveCount ; i++) + { + GLuint prim = VB->Primitive[i].mode; + GLuint start = VB->Primitive[i].start; + GLuint length = VB->Primitive[i].count; + + if (!length) + continue; + + i830_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length, + prim ); + } + + tnl->Driver.Render.Finish( ctx ); + + return GL_FALSE; /* finished the pipe */ +} + + +const struct tnl_pipeline_stage _i830_render_stage = +{ + "i830 render", + NULL, + NULL, + NULL, + NULL, + i830_run_render /* run */ +}; |