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, 367 insertions, 0 deletions

diff --git a/src/mesa/vbo/vbo_exec_array.c b/src/mesa/vbo/vbo_exec_array.c
new file mode 100644
index 00000000000..5cfa7a01a96
--- /dev/null
+++ b/src/mesa/vbo/vbo_exec_array.c
@@ -0,0 +1,367 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+#include "glheader.h"
+#include "context.h"
+#include "state.h"
+#include "api_validate.h"
+#include "api_noop.h"
+#include "dispatch.h"
+
+#include "vbo_context.h"
+
+static GLuint get_max_index( GLuint count, GLuint type, 
+			     const GLvoid *indices )
+{
+   GLint i;
+
+   /* Compute max element.  This is only needed for upload of non-VBO,
+    * non-constant data elements.
+    *
+    * XXX: Postpone this calculation until it is known that it is
+    * needed.  Otherwise could scan this pointlessly in the all-vbo
+    * case.
+    */
+   switch(type) {
+   case GL_UNSIGNED_INT: {
+      const GLuint *ui_indices = (const GLuint *)indices;
+      GLuint max_ui = 0;
+      for (i = 0; i < count; i++)
+	 if (ui_indices[i] > max_ui)
+	    max_ui = ui_indices[i];
+      return max_ui;
+   }
+   case GL_UNSIGNED_SHORT: {
+      const GLushort *us_indices = (const GLushort *)indices;
+      GLuint max_us = 0;
+      for (i = 0; i < count; i++)
+	 if (us_indices[i] > max_us)
+	    max_us = us_indices[i];
+      return max_us;
+   }
+   case GL_UNSIGNED_BYTE: {
+      const GLubyte *ub_indices = (const GLubyte *)indices;
+      GLuint max_ub = 0;
+      for (i = 0; i < count; i++)
+	 if (ub_indices[i] > max_ub)
+	    max_ub = ub_indices[i];
+      return max_ub;
+   }
+   default:
+      return 0;
+   }
+}
+
+
+/* Just translate the arrayobj into a sane layout.
+ */
+static void bind_array_obj( GLcontext *ctx )
+{
+   struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+   GLuint i;
+
+   /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
+    * rather than as individual named arrays.  Then this function can
+    * go away.
+    */
+   exec->array.legacy_array[VERT_ATTRIB_POS] = &ctx->Array.ArrayObj->Vertex;
+   exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &ctx->Array.ArrayObj->Normal;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &ctx->Array.ArrayObj->Color;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &ctx->Array.ArrayObj->SecondaryColor;
+   exec->array.legacy_array[VERT_ATTRIB_FOG] = &ctx->Array.ArrayObj->FogCoord;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &ctx->Array.ArrayObj->Index;
+   exec->array.legacy_array[VBO_ATTRIB_EDGEFLAG] = &ctx->Array.ArrayObj->EdgeFlag;
+
+   for (i = 0; i < 8; i++)
+      exec->array.legacy_array[VBO_ATTRIB_TEX0 + i] = &ctx->Array.ArrayObj->TexCoord[i];
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++)
+      exec->array.generic_array[i] = &ctx->Array.ArrayObj->VertexAttrib[i];
+   
+   exec->array.array_obj = ctx->Array.ArrayObj->Name;
+}
+
+static void recalculate_input_bindings( GLcontext *ctx )
+{
+   struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+   const struct gl_client_array **inputs = &exec->array.inputs[0];
+   GLuint i;
+
+   exec->array.program_mode = get_program_mode(ctx);
+   exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
+
+   /* TODO:  Get rid of NV_program (please!).
+    */
+   switch (exec->array.program_mode) {
+   case VP_NONE:
+      /* When no vertex program is active, we put the material values
+       * into the generic slots.  This is the only situation where
+       * material values are available as per-vertex attributes.
+       */
+      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else
+	    inputs[i] = &exec->legacy_currval[i];
+      }
+
+      for (i = 0; i < MAT_ATTRIB_MAX; i++) {
+	 inputs[VERT_ATTRIB_GENERIC0 + i] = &exec->mat_currval[i];
+      }
+      break;
+   case VP_NV:
+      /* NV_vertex_program - attribute arrays alias and override
+       * conventional, legacy arrays.  No materials, and the generic
+       * slots are vacant.
+       */
+      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.generic_array[i]->Enabled)
+	    inputs[i] = exec->array.generic_array[i];
+	 else if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else
+	    inputs[i] = &exec->legacy_currval[i];
+      }
+      break;
+   case VP_ARB:
+      /* ARB_vertex_program - Only the attribute zero (position) array
+       * aliases and overrides the legacy position array.  
+       *
+       * Otherwise, legacy attributes available in the legacy slots,
+       * generic attributes in the generic slots and materials are not
+       * available as per-vertex attributes.
+       */
+      if (exec->array.generic_array[0]->Enabled)
+	 inputs[0] = exec->array.generic_array[0];
+      else if (exec->array.legacy_array[0]->Enabled)
+	 inputs[0] = exec->array.legacy_array[0];
+      else
+	 inputs[0] = &exec->legacy_currval[0];
+
+
+      for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else
+	    inputs[i] = &exec->legacy_currval[i];
+      }
+
+      for (i = 0; i < 16; i++) {
+	 if (exec->array.generic_array[0]->Enabled)
+	    inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
+	 else
+	    inputs[VERT_ATTRIB_GENERIC0 + i] = &exec->generic_currval[i];
+      }
+      break;
+   }
+}
+
+static void bind_arrays( GLcontext *ctx )
+{
+#if 0
+   if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
+      bind_array_obj(ctx);
+      recalculate_input_bindings(ctx);
+   }
+   else if (exec->array.program_mode != get_program_mode(ctx) ||
+	    exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
+      
+      recalculate_input_bindings(ctx);
+   }
+#else
+   bind_array_obj(ctx);
+   recalculate_input_bindings(ctx);
+#endif
+}
+
+
+
+/***********************************************************************
+ * API functions.
+ */
+
+static void GLAPIENTRY
+vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct _mesa_prim prim[1];
+
+   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
+      return;
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+      
+   bind_arrays( ctx );
+
+   prim[0].begin = 1;
+   prim[0].end = 1;
+   prim[0].weak = 0;
+   prim[0].pad = 0;
+
+   if (exec->array.inputs[0]->BufferObj->Name) {
+      /* Use vertex attribute as a hint to tell us if we expect all
+       * arrays to be in VBO's and if so, don't worry about avoiding
+       * the upload of elements < start.
+       */
+      prim[0].mode = mode;
+      prim[0].start = start;
+      prim[0].count = count;
+      prim[0].indexed = 0;
+
+      vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, 0, start + count );
+   }
+   else {
+      /* If not using VBO's, we don't want to upload any more elements
+       * than necessary from the arrays as they will not be valid next
+       * time the application tries to draw with them.
+       */
+      prim[0].mode = mode;
+      prim[0].start = 0;
+      prim[0].count = count;
+      prim[0].indexed = 0;
+
+      vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, start, start + count );
+   }
+}
+
+
+
+static void GLAPIENTRY
+vbo_exec_DrawRangeElements(GLenum mode,
+			   GLuint start, GLuint end,
+			   GLsizei count, GLenum type, const GLvoid *indices)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct _mesa_index_buffer ib;
+   struct _mesa_prim prim[1];
+
+   if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
+      return;
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+      
+   ib.count = count;
+   ib.type = type; 
+   ib.obj = ctx->Array.ElementArrayBufferObj;
+   ib.ptr = indices;
+
+   if (ctx->Array.ElementArrayBufferObj->Name) {
+      /* Use the fact that indices are in a VBO as a hint that the
+       * program has put all the arrays in VBO's and we don't have to
+       * worry about performance implications of start > 0.
+       *
+       * XXX: consider passing start as min_index to draw_prims instead.
+       */
+      ib.rebase = 0;
+   }
+   else {
+      ib.rebase = start;
+   }
+
+   prim[0].begin = 1;
+   prim[0].end = 1;
+   prim[0].weak = 0;
+   prim[0].pad = 0;
+   prim[0].mode = mode;
+   prim[0].start = 0;
+   prim[0].count = count;
+   prim[0].indexed = 1;
+
+   vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, ib.rebase, end+1 );
+}
+
+
+static void GLAPIENTRY
+vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint max_index;
+
+   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
+      return;
+
+   if (ctx->Array.ElementArrayBufferObj->Name) {
+      const GLvoid *map = ctx->Driver.MapBuffer(ctx,
+						 GL_ELEMENT_ARRAY_BUFFER_ARB,
+						 GL_DYNAMIC_READ_ARB,
+						 ctx->Array.ElementArrayBufferObj);
+
+      max_index = get_max_index(count, type, ADD_POINTERS(map, indices));
+
+      ctx->Driver.UnmapBuffer(ctx,
+			      GL_ELEMENT_ARRAY_BUFFER_ARB,
+			      ctx->Array.ElementArrayBufferObj);
+   }
+   else {
+      max_index = get_max_index(count, type, indices);
+   }
+
+   vbo_exec_DrawRangeElements(mode, 0, max_index, count, type, indices);
+}
+
+
+/***********************************************************************
+ * Initialization
+ */
+
+
+
+
+void vbo_exec_array_init( struct vbo_exec_context *exec )
+{
+   GLcontext *ctx = exec->ctx;
+
+#if 1
+   exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
+   exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
+   exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
+#else
+   exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
+   exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
+   exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
+#endif
+
+   exec->array.index_obj = ctx->Driver.NewBufferObject(ctx, 1, GL_ARRAY_BUFFER_ARB);
+}
+
+
+void vbo_exec_array_destroy( struct vbo_exec_context *exec )
+{
+   GLcontext *ctx = exec->ctx;
+
+   ctx->Driver.DeleteBuffer(ctx, exec->array.index_obj);
+}