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/**************************************************************************
*
* 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:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#include "main/imports.h"
#include "vbo/vbo.h"
#include "tnl/t_context.h"
#include "tnl/t_pipeline.h"
#include "st_context.h"
#include "st_atom.h"
#include "st_draw.h"
#include "st_cb_bufferobjects.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "vbo/vbo_context.h"
/*
* Enabling this causes the VBO module to call draw_vbo() below,
* bypassing the T&L module. This only works with VBO-based demos,
* such as progs/test/bufferobj.c
*/
#define USE_NEW_DRAW 0
/*
* TNL stage which feeds into the above.
*
* XXX: this needs to go into each driver using this code, because we
* cannot make the leap from ctx->draw_context in this file. The
* driver needs to customize tnl anyway, so this isn't a big deal.
*/
static GLboolean draw( GLcontext * ctx, struct tnl_pipeline_stage *stage )
{
struct st_context *st = st_context(ctx);
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
/* Validate driver and pipe state:
*/
st_validate_state( st );
/* Call into the new draw code to handle the VB:
*/
st->pipe->draw_vb( st->pipe, VB );
/* Finished
*/
return GL_FALSE;
}
const struct tnl_pipeline_stage st_draw = {
"check state and draw",
NULL,
NULL,
NULL,
NULL,
draw
};
static const struct tnl_pipeline_stage *st_pipeline[] = {
&_tnl_vertex_transform_stage,
&_tnl_vertex_cull_stage,
&_tnl_normal_transform_stage,
&_tnl_lighting_stage,
&_tnl_fog_coordinate_stage,
&_tnl_texgen_stage,
&_tnl_texture_transform_stage,
&_tnl_point_attenuation_stage,
&_tnl_vertex_program_stage,
&st_draw, /* ADD: escape to pipe */
0,
};
static GLuint
pipe_vertex_format(GLenum format, GLuint size)
{
static const GLuint float_fmts[4] = {
PIPE_FORMAT_R32_FLOAT,
PIPE_FORMAT_R32G32_FLOAT,
PIPE_FORMAT_R32G32B32_FLOAT,
PIPE_FORMAT_R32G32B32A32_FLOAT,
};
assert(format >= GL_BYTE);
assert(format <= GL_DOUBLE);
assert(size >= 1);
assert(size <= 4);
switch (format) {
case GL_FLOAT:
return float_fmts[size - 1];
default:
assert(0);
}
}
/**
* This function gets plugged into the VBO module and is called when
* we have something to render.
* Basically, translate the information into the format expected by pipe.
*/
static void
draw_vbo(GLcontext *ctx,
const struct gl_client_array **arrays,
const struct _mesa_prim *prims,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLuint min_index,
GLuint max_index)
{
struct pipe_context *pipe = ctx->st->pipe;
GLuint attr, i;
/* tell pipe about the vertex array element/attributes */
for (attr = 0; attr < 16; attr++) {
struct gl_buffer_object *bufobj = arrays[attr]->BufferObj;
struct pipe_vertex_buffer vbuffer;
struct pipe_vertex_element velement;
if (bufobj && bufobj->Name) {
struct st_buffer_object *stobj = st_buffer_object(bufobj);
assert(stobj->buffer);
vbuffer.pitch = arrays[attr]->StrideB; /* in bytes */
vbuffer.max_index = 0;
vbuffer.buffer = stobj->buffer;
vbuffer.buffer_offset = 0;
/* Recall that for VBOs, the gl_client_array->Ptr field is
* really an offset from the start of the VBO, not a pointer.
*/
velement.src_offset = (unsigned) arrays[attr]->Ptr;
velement.vertex_buffer_index = attr;
velement.dst_offset = 0;
velement.src_format = pipe_vertex_format(arrays[attr]->Type,
arrays[attr]->Size);
}
else {
/* vertex attribute data is not an a real buffer! */
/* XXX we'll want to handle that someday... */
vbuffer.buffer = NULL;
}
pipe->set_vertex_buffer(pipe, attr, &vbuffer);
pipe->set_vertex_element(pipe, attr, &velement);
}
/* do actual drawing */
for (i = 0; i < nr_prims; i++) {
pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
}
}
/* This is all a hack to keep using tnl until we have vertex programs
* up and running.
*/
void st_init_draw( struct st_context *st )
{
GLcontext *ctx = st->ctx;
#if USE_NEW_DRAW
struct vbo_context *vbo = (struct vbo_context *) ctx->swtnl_im;
assert(vbo);
assert(vbo->draw_prims);
vbo->draw_prims = draw_vbo;
#else
_tnl_destroy_pipeline( ctx );
_tnl_install_pipeline( ctx, st_pipeline );
#endif
}
void st_destroy_draw( struct st_context *st )
{
/* Nothing to do.
*/
}
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