Checkpoint of new vbo-building code. Currently builds regular arrays

rather than VBO's - VBOs are easy but need to look closer at the
driver interface.  The trivial/tri demo works.

1 files changed, 199 insertions, 0 deletions

diff --git a/src/mesa/vbo/vbo_exec_draw.c b/src/mesa/vbo/vbo_exec_draw.c
new file mode 100644
index 0000000000..f665c64c7a
--- /dev/null
+++ b/src/mesa/vbo/vbo_exec_draw.c
@@ -0,0 +1,199 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  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 <keith@tungstengraphics.com>
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "enums.h"
+#include "state.h"
+#include "macros.h"
+
+#include "vbo_context.h"
+
+
+static void vbo_exec_debug_verts( struct vbo_exec_context *exec )
+{
+   GLuint count = exec->vtx.vert_count;
+   GLuint i;
+
+   _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
+		__FUNCTION__,
+		count,
+		exec->vtx.prim_count,
+		exec->vtx.vertex_size);
+
+   for (i = 0 ; i < exec->vtx.prim_count ; i++) {
+      struct _mesa_prim *prim = &exec->vtx.prim[i];
+      _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
+		   i, 
+		   _mesa_lookup_enum_by_nr(prim->mode),
+		   prim->weak ? " (weak)" : "",
+		   prim->start, 
+		   prim->start + prim->count,
+		   prim->begin ? "BEGIN" : "(wrap)",
+		   prim->end ? "END" : "(wrap)");
+   }
+}
+
+
+/*
+ * NOTE: Need to have calculated primitives by this point -- do it on the fly.
+ * NOTE: Old 'parity' issue is gone.
+ */
+static GLuint vbo_copy_vertices( struct vbo_exec_context *exec )
+{
+   GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
+   GLuint ovf, i;
+   GLuint sz = exec->vtx.vertex_size;
+   GLfloat *dst = exec->vtx.copied.buffer;
+   GLfloat *src = ((GLfloat *)exec->vtx.buffer_map + 
+		   exec->vtx.prim[exec->vtx.prim_count-1].start * 
+		   exec->vtx.vertex_size);
+
+
+   switch( exec->ctx->Driver.CurrentExecPrimitive )
+   {
+   case GL_POINTS:
+      return 0;
+   case GL_LINES:
+      ovf = nr&1;
+      for (i = 0 ; i < ovf ; i++)
+	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
+      return i;
+   case GL_TRIANGLES:
+      ovf = nr%3;
+      for (i = 0 ; i < ovf ; i++)
+	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
+      return i;
+   case GL_QUADS:
+      ovf = nr&3;
+      for (i = 0 ; i < ovf ; i++)
+	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
+      return i;
+   case GL_LINE_STRIP:
+      if (nr == 0) 
+	 return 0;
+      else {
+	 _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
+	 return 1;
+      }
+   case GL_LINE_LOOP:
+   case GL_TRIANGLE_FAN:
+   case GL_POLYGON:
+      if (nr == 0) 
+	 return 0;
+      else if (nr == 1) {
+	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
+	 return 1;
+      } else {
+	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
+	 _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
+	 return 2;
+      }
+   case GL_TRIANGLE_STRIP:
+   case GL_QUAD_STRIP:
+      switch (nr) {
+      case 0: ovf = 0; break;
+      case 1: ovf = 1; break;
+      default: ovf = 2 + (nr&1); break;
+      }
+      for (i = 0 ; i < ovf ; i++)
+	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
+      return i;
+   case GL_POLYGON+1:
+      return 0;
+   default:
+      assert(0);
+      return 0;
+   }
+}
+
+
+/* TODO: populate these as the vertex is defined:
+ */
+static void vbo_exec_bind_arrays( struct vbo_exec_context *exec )
+{
+   struct gl_client_array *arrays = exec->vtx.arrays;
+   GLuint count = exec->vtx.vert_count;
+   GLubyte *data = exec->vtx.buffer_map;
+   GLuint attr;
+
+   memcpy(arrays,      exec->legacy_currval, 16 * sizeof(arrays[0]));
+   memcpy(arrays + 16, exec->mat_currval,    16 * sizeof(arrays[0]));
+
+   /* Make all active attributes (including edgeflag) available as
+    * arrays of floats.
+    */
+   for (attr = 0; attr < VBO_ATTRIB_MAX ; attr++) {
+      if (exec->vtx.attrsz[attr]) {
+	 arrays[attr].Ptr = (void *)data;
+	 arrays[attr].Size = exec->vtx.attrsz[attr];
+	 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
+	 arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
+	 arrays[attr].Type = GL_FLOAT;
+	 arrays[attr].Enabled = 1;
+	 arrays[attr].BufferObj = exec->vtx.bufferobj; /* NullBufferObj */
+	 arrays[attr]._MaxElement = count; /* ??? */
+
+	 data += exec->vtx.attrsz[attr] * sizeof(GLfloat);
+      }
+   }
+}
+
+
+/**
+ * Execute the buffer and save copied verts.
+ */
+void vbo_exec_vtx_flush( struct vbo_exec_context *exec )
+{
+   if (0)
+      vbo_exec_debug_verts( exec );
+
+
+   if (exec->vtx.prim_count && 
+       exec->vtx.vert_count) {
+
+      exec->vtx.copied.nr = vbo_copy_vertices( exec ); 
+
+      if (exec->vtx.copied.nr != exec->vtx.vert_count) {
+	 GLcontext *ctx = exec->ctx;
+
+	 vbo_exec_bind_arrays( exec );
+
+	 vbo_context(ctx)->draw_prims( ctx, 
+				       exec->vtx.inputs, 
+				       exec->vtx.prim, 
+				       exec->vtx.prim_count,
+				       NULL,
+				       0,
+				       exec->vtx.vert_count );
+      }
+   }
+
+   exec->vtx.prim_count = 0;
+   exec->vtx.vert_count = 0;
+   exec->vtx.vbptr = (GLfloat *)exec->vtx.buffer_map;
+}