llvmpipe: import experimental softpipe rasterizer code, wip binning code

WIP, does't build or run.

Rasterizer code is based on Nick Capen's devmaster posts and the
larrabee articles, but currently doesn't share either the performance
or correctness of either...

1 files changed, 140 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
new file mode 100644
index 0000000000..848705e099
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -0,0 +1,140 @@
+/**************************************************************************
+ *
+ * Copyright 2007 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.
+ *
+ **************************************************************************/
+#ifndef LP_SETUP_CONTEXT_H
+#define LP_SETUP_CONTEXT_H
+
+struct clear_tile {
+   boolean do_color;
+   boolean do_depth_stencil;
+   unsigned rgba;
+   unsigned depth_stencil;
+};
+
+struct load_tile {
+   boolean do_color;
+   boolean do_depth_stencil;
+};
+
+/* Shade tile points directly at this:
+ */
+struct shader_inputs {
+   /* Some way of updating rasterizer state:
+    */
+   /* ??? */
+
+   /* Attribute interpolation:
+    */
+   float oneoverarea;
+   float x1;
+   float y1;
+
+   struct tgsi_interp_coef position_coef;
+   struct tgsi_interp_coef *coef;
+};
+
+/* Shade triangle points at this:
+ */
+struct shade_triangle {
+   /* one-pixel sized trivial accept offsets for each plane */
+   float ei1;                   
+   float ei2;
+   float ei3;
+
+   /* one-pixel sized trivial reject offsets for each plane */
+   float eo1;                   
+   float eo2;
+   float eo3;
+
+   /* y deltas for vertex pairs */
+   float dy12;
+   float dy23;
+   float dy31;
+
+   /* x deltas for vertex pairs */
+   float dx12;
+   float dx23;
+   float dx31;
+   
+   struct shader_inputs inputs;
+};
+
+struct bin_cmd {
+   enum {
+      CMD_END = 0,
+      CMD_CLEAR,
+      CMD_LOAD_TILE,
+      CMD_SHADE_TILE,
+      CMD_SHADE_TRIANGLE,
+   } cmd;
+
+   union {
+      struct triangle *tri;
+      struct clear *clear;
+   } ptr;
+};
+
+struct cmd_block {
+   struct bin_cmd cmds[128];
+   unsigned count;
+   struct cmd_block *next;
+};
+
+/* Triangles
+ */
+struct data_block {
+   ubyte data[4096 - sizeof(unsigned) - sizeof(struct cmd_block *)];
+   unsigned count;
+   struct data_block *next;
+};
+
+/* Need to store the state at the time the triangle was drawn, at
+ * least as it is needed during rasterization.  That would include at
+ * minimum the constant values referred to by the fragment shader,
+ * blend state, etc.  Much of this is code-generated into the shader
+ * in llvmpipe -- may be easier to do this work there.
+ */
+struct state_block {
+};
+
+
+/**
+ * Basically all the data from a binner scene:
+ */
+struct binned_scene {
+   struct llvmpipe_context *llvmpipe;
+
+   struct cmd_block *bin[MAX_HEIGHT / BIN_SIZE][MAX_WIDTH / BIN_SIZE];
+   struct data_block *data;
+};
+
+static INLINE struct triangle *get_triangle( struct setup_context *setup )
+{
+   if (setup->triangles->count == TRIANGLE_BLOCK_COUNT)
+      return setup_triangle_from_new_block( setup );
+
+   return &setup->triangles[setup->triangles->count++];
+}