A version of the i915tex driver with all drawing code removed.

This is intended to support the softpipe development work.  More code
will be removed and pushed into softpipe until this basicially becomes
the DRI/GLX interface for that driver.

1 files changed, 244 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915pipe/intel_render.c b/src/mesa/drivers/dri/i915pipe/intel_render.c
new file mode 100644
index 0000000000..c8b6d308d9
--- /dev/null
+++ b/src/mesa/drivers/dri/i915pipe/intel_render.c
@@ -0,0 +1,244 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, 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 TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+/*
+ * 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 "tnl/t_vertex.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_tris.h"
+#include "intel_batchbuffer.h"
+#include "intel_reg.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 INTEL/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
+};
+
+
+static void
+intelDmaPrimitive(struct intel_context *intel, GLenum prim)
+{
+   if (0)
+      fprintf(stderr, "%s %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(prim));
+   INTEL_FIREVERTICES(intel);
+   intel->vtbl.reduced_primitive_state(intel, reduced_prim[prim]);
+   intelStartInlinePrimitive(intel, hw_prim[prim], INTEL_BATCH_CLIPRECTS);
+}
+
+
+#define LOCAL_VARS struct intel_context *intel = intel_context(ctx)
+#define INIT( prim ) 				\
+do {						\
+   intelDmaPrimitive( intel, prim );		\
+} while (0)
+
+#define FLUSH() INTEL_FIREVERTICES(intel)
+
+#define GET_SUBSEQUENT_VB_MAX_VERTS() \
+  ((intel->batch->size - 1500) / (intel->vertex_size*4))
+#define GET_CURRENT_VB_MAX_VERTS() GET_SUBSEQUENT_VB_MAX_VERTS()
+
+#define ALLOC_VERTS( nr ) \
+   intelExtendInlinePrimitive( intel, (nr) * intel->vertex_size )
+
+#define EMIT_VERTS( ctx, j, nr, buf ) \
+  _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf )
+
+#define TAG(x) intel_##x
+#include "tnl_dd/t_dd_dmatmp.h"
+
+
+/**********************************************************************/
+/*                          Render pipeline stage                     */
+/**********************************************************************/
+
+/* Heuristic to choose between the two render paths:  
+ */
+static GLboolean
+choose_render(struct intel_context *intel, struct vertex_buffer *VB)
+{
+   int vertsz = intel->vertex_size;
+   int cost_render = 0;
+   int cost_fallback = 0;
+   int nr_prims = 0;
+   int nr_rprims = 0;
+   int nr_rverts = 0;
+   int rprim = intel->reduced_primitive;
+   int i = 0;
+
+   for (i = 0; i < VB->PrimitiveCount; i++) {
+      GLuint prim = VB->Primitive[i].mode;
+      GLuint length = VB->Primitive[i].count;
+
+      if (!length)
+         continue;
+
+      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];
+      }
+   }
+
+   /* One point for each generated primitive:
+    */
+   cost_render = nr_prims;
+   cost_fallback = nr_rprims;
+
+   /* One point for every 1024 dwords (4k) of dma:
+    */
+   cost_render += (vertsz * i) / 1024;
+   cost_fallback += (vertsz * nr_rverts) / 1024;
+
+   if (0)
+      fprintf(stderr, "cost render: %d fallback: %d\n",
+              cost_render, cost_fallback);
+
+   if (cost_render > cost_fallback)
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+intel_run_render(GLcontext * ctx, struct tnl_pipeline_stage *stage)
+{
+   struct intel_context *intel = intel_context(ctx);
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+   GLuint i;
+
+   intel->vtbl.render_prevalidate( intel );
+
+   /* Don't handle clipping or indexed vertices.
+    */
+   if (intel->RenderIndex != 0 ||
+       !intel_validate_render(ctx, VB) || !choose_render(intel, VB)) {
+      return GL_TRUE;
+   }
+
+   tnl->clipspace.new_inputs |= VERT_BIT_POS;
+
+   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;
+
+      intel_render_tab_verts[prim & PRIM_MODE_MASK] (ctx, start,
+                                                     start + length, prim);
+   }
+
+   tnl->Driver.Render.Finish(ctx);
+
+   INTEL_FIREVERTICES(intel);
+
+   return GL_FALSE;             /* finished the pipe */
+}
+
+const struct tnl_pipeline_stage _intel_render_stage = {
+   "intel render",
+   NULL,
+   NULL,
+   NULL,
+   NULL,
+   intel_run_render             /* run */
+};