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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
commitf4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch)
tree2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_render.c')
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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
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--- /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 */
+};