+++ /dev/null
-/**************************************************************************
- *
- * 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.
- *
- **************************************************************************/
-
- /*
- * Authors:
- * Zack Rusin zack@tungstengraphics.com
- */
-
-#include "pipe/p_util.h"
-#include "draw_private.h"
-#include "draw_context.h"
-
-#ifdef MESA_LLVM
-
-#include "pipe/llvm/gallivm.h"
-#include "pipe/p_shader_tokens.h"
-
-#define DBG 0
-
-static INLINE void
-fetch_attrib4(const void *ptr, enum pipe_format format, float attrib[4])
-{
- /* defaults */
- attrib[1] = 0.0;
- attrib[2] = 0.0;
- attrib[3] = 1.0;
- switch (format) {
- case PIPE_FORMAT_R32G32B32A32_FLOAT:
- attrib[3] = ((float *) ptr)[3];
- /* fall-through */
- case PIPE_FORMAT_R32G32B32_FLOAT:
- attrib[2] = ((float *) ptr)[2];
- /* fall-through */
- case PIPE_FORMAT_R32G32_FLOAT:
- attrib[1] = ((float *) ptr)[1];
- /* fall-through */
- case PIPE_FORMAT_R32_FLOAT:
- attrib[0] = ((float *) ptr)[0];
- break;
- default:
- assert(0);
- }
-}
-
-
-/**
- * Fetch vertex attributes for 'count' vertices.
- */
-static INLINE
-void vertex_fetch(struct draw_context *draw,
- const unsigned elt,
- float (*inputs)[4])
-{
- uint attr;
-
- /* loop over vertex attributes (vertex shader inputs) */
- for (attr = 0; attr < draw->vertex_shader->state->num_inputs; attr++) {
-
- unsigned buf = draw->vertex_element[attr].vertex_buffer_index;
- const void *src
- = (const void *) ((const ubyte *) draw->user.vbuffer[buf]
- + draw->vertex_buffer[buf].buffer_offset
- + draw->vertex_element[attr].src_offset
- + elt * draw->vertex_buffer[buf].pitch);
- fetch_attrib4(src, draw->vertex_element[attr].src_format, inputs[attr]);
- }
-}
-
-static INLINE unsigned
-compute_clipmask(const float *clip, const float (*plane)[4], unsigned nr)
-{
- unsigned mask = 0;
- unsigned i;
-
- for (i = 0; i < nr; i++) {
- if (dot4(clip, plane[i]) < 0)
- mask |= (1<<i);
- }
-
- return mask;
-}
-
-
-/**
- * Called by the draw module when the vertx cache needs to be flushed.
- * This involves running the vertex shader.
- */
-void draw_vertex_shader_queue_flush_llvm(struct draw_context *draw)
-{
- unsigned i;
-
- struct vertex_header *dests[VS_QUEUE_LENGTH];
- float inputs[VS_QUEUE_LENGTH][PIPE_MAX_SHADER_INPUTS][4] ALIGN16_ATTRIB;
- float outputs[VS_QUEUE_LENGTH][PIPE_MAX_SHADER_INPUTS][4] ALIGN16_ATTRIB;
- float (*consts)[4] = (float (*)[4]) draw->user.constants;
- struct gallivm_prog *prog = draw->vertex_shader->llvm_prog;
- const float *scale = draw->viewport.scale;
- const float *trans = draw->viewport.translate;
- /* fetch the inputs */
- for (i = 0; i < draw->vs.queue_nr; ++i) {
- unsigned elt = draw->vs.queue[i].elt;
- dests[i] = draw->vs.queue[i].dest;
- vertex_fetch(draw, elt, inputs[i]);
- }
-
- /* batch execute the shaders on all the vertices */
- gallivm_prog_exec(prog, inputs, outputs, consts,
- draw->vs.queue_nr,
- draw->vertex_shader->state->num_inputs,
- draw->vertex_shader->state->num_outputs);
-
-
- /* store machine results */
- for (int i = 0; i < draw->vs.queue_nr; ++i) {
- unsigned slot;
- float x, y, z, w;
- struct vertex_header *vOut = draw->vs.queue[i].dest;
- float (*dests)[4] = outputs[i];
-
- /* Handle attr[0] (position) specially:
- *
- * XXX: Computing the clipmask should be done in the vertex
- * program as a set of DP4 instructions appended to the
- * user-provided code.
- */
- x = vOut->clip[0] = dests[0][0];
- y = vOut->clip[1] = dests[0][1];
- z = vOut->clip[2] = dests[0][2];
- w = vOut->clip[3] = dests[0][3];
-#if DBG
- debug_printf("output %d: %f %f %f %f\n", 0, x, y, z, w);
-#endif
-
- vOut->clipmask = compute_clipmask(vOut->clip, draw->plane, draw->nr_planes);
- vOut->edgeflag = 1;
- /* divide by w */
- w = 1.0f / w;
- x *= w;
- y *= w;
- z *= w;
-
- /* Viewport mapping */
- vOut->data[0][0] = x * scale[0] + trans[0];
- vOut->data[0][1] = y * scale[1] + trans[1];
- vOut->data[0][2] = z * scale[2] + trans[2];
- vOut->data[0][3] = w;
-
- /* Remaining attributes are packed into sequential post-transform
- * vertex attrib slots.
- */
- for (slot = 1; slot < draw->num_vs_outputs; slot++) {
- vOut->data[slot][0] = dests[slot][0];
- vOut->data[slot][1] = dests[slot][1];
- vOut->data[slot][2] = dests[slot][2];
- vOut->data[slot][3] = dests[slot][3];
-
-#if DBG
- debug_printf("output %d: %f %f %f %f\n", slot,
- vOut->data[slot][0],
- vOut->data[slot][1],
- vOut->data[slot][2],
- vOut->data[slot][3]);
-#endif
- }
- } /* loop over vertices */
-
- draw->vs.queue_nr = 0;
-}
-
-#endif /* MESA_LLVM */
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