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/**********************************************************
* Copyright 2008-2009 VMware, Inc. 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 THE AUTHORS OR COPYRIGHT HOLDERS
* 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 "util/u_helpers.h"
#include "util/u_inlines.h"
#include "pipe/p_defines.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_transfer.h"
#include "tgsi/tgsi_parse.h"
#include "svga_screen.h"
#include "svga_resource_buffer.h"
#include "svga_context.h"
static void svga_set_vertex_buffers(struct pipe_context *pipe,
unsigned start_slot, unsigned count,
const struct pipe_vertex_buffer *buffers)
{
struct svga_context *svga = svga_context(pipe);
util_set_vertex_buffers_count(svga->curr.vb,
&svga->curr.num_vertex_buffers,
buffers, start_slot, count);
svga->dirty |= SVGA_NEW_VBUFFER;
}
static void svga_set_index_buffer(struct pipe_context *pipe,
const struct pipe_index_buffer *ib)
{
struct svga_context *svga = svga_context(pipe);
if (ib) {
pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
}
else {
pipe_resource_reference(&svga->curr.ib.buffer, NULL);
memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
}
/* TODO make this more like a state */
}
/**
* Given a gallium vertex element format, return the corresponding SVGA3D
* format. Return SVGA3D_DECLTYPE_MAX for unsupported gallium formats.
*/
static SVGA3dDeclType
translate_vertex_format(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_R32_FLOAT: return SVGA3D_DECLTYPE_FLOAT1;
case PIPE_FORMAT_R32G32_FLOAT: return SVGA3D_DECLTYPE_FLOAT2;
case PIPE_FORMAT_R32G32B32_FLOAT: return SVGA3D_DECLTYPE_FLOAT3;
case PIPE_FORMAT_R32G32B32A32_FLOAT: return SVGA3D_DECLTYPE_FLOAT4;
case PIPE_FORMAT_B8G8R8A8_UNORM: return SVGA3D_DECLTYPE_D3DCOLOR;
case PIPE_FORMAT_R8G8B8A8_USCALED: return SVGA3D_DECLTYPE_UBYTE4;
case PIPE_FORMAT_R16G16_SSCALED: return SVGA3D_DECLTYPE_SHORT2;
case PIPE_FORMAT_R16G16B16A16_SSCALED: return SVGA3D_DECLTYPE_SHORT4;
case PIPE_FORMAT_R8G8B8A8_UNORM: return SVGA3D_DECLTYPE_UBYTE4N;
case PIPE_FORMAT_R16G16_SNORM: return SVGA3D_DECLTYPE_SHORT2N;
case PIPE_FORMAT_R16G16B16A16_SNORM: return SVGA3D_DECLTYPE_SHORT4N;
case PIPE_FORMAT_R16G16_UNORM: return SVGA3D_DECLTYPE_USHORT2N;
case PIPE_FORMAT_R16G16B16A16_UNORM: return SVGA3D_DECLTYPE_USHORT4N;
case PIPE_FORMAT_R10G10B10X2_USCALED: return SVGA3D_DECLTYPE_UDEC3;
case PIPE_FORMAT_R10G10B10X2_SNORM: return SVGA3D_DECLTYPE_DEC3N;
case PIPE_FORMAT_R16G16_FLOAT: return SVGA3D_DECLTYPE_FLOAT16_2;
case PIPE_FORMAT_R16G16B16A16_FLOAT: return SVGA3D_DECLTYPE_FLOAT16_4;
/* See attrib_needs_adjustment() and attrib_needs_w_to_1() below */
case PIPE_FORMAT_R8G8B8_SNORM: return SVGA3D_DECLTYPE_UBYTE4N;
/* See attrib_needs_w_to_1() below */
case PIPE_FORMAT_R16G16B16_SNORM: return SVGA3D_DECLTYPE_SHORT4N;
case PIPE_FORMAT_R16G16B16_UNORM: return SVGA3D_DECLTYPE_USHORT4N;
case PIPE_FORMAT_R8G8B8_UNORM: return SVGA3D_DECLTYPE_UBYTE4N;
default:
/* There are many formats without hardware support. This case
* will be hit regularly, meaning we'll need swvfetch.
*/
return SVGA3D_DECLTYPE_MAX;
}
}
/**
* Does the given vertex attrib format need range adjustment in the VS?
* Range adjustment scales and biases values from [0,1] to [-1,1].
* This lets us avoid the swtnl path.
*/
static boolean
attrib_needs_range_adjustment(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_R8G8B8_SNORM:
return TRUE;
default:
return FALSE;
}
}
/**
* Does the given vertex attrib format need to have the W component set
* to one in the VS?
*/
static boolean
attrib_needs_w_to_1(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_R8G8B8_SNORM:
case PIPE_FORMAT_R8G8B8_UNORM:
case PIPE_FORMAT_R16G16B16_SNORM:
case PIPE_FORMAT_R16G16B16_UNORM:
return TRUE;
default:
return FALSE;
}
}
static void *
svga_create_vertex_elements_state(struct pipe_context *pipe,
unsigned count,
const struct pipe_vertex_element *attribs)
{
struct svga_velems_state *velems;
assert(count <= PIPE_MAX_ATTRIBS);
velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
if (velems) {
unsigned i;
velems->count = count;
memcpy(velems->velem, attribs, sizeof(*attribs) * count);
velems->need_swvfetch = FALSE;
velems->adjust_attrib_range = 0x0;
velems->adjust_attrib_w_1 = 0x0;
/* Translate Gallium vertex format to SVGA3dDeclType */
for (i = 0; i < count; i++) {
enum pipe_format f = attribs[i].src_format;
velems->decl_type[i] = translate_vertex_format(f);
if (velems->decl_type[i] == SVGA3D_DECLTYPE_MAX) {
/* Unsupported format - use software fetch */
velems->need_swvfetch = TRUE;
break;
}
if (attrib_needs_range_adjustment(f)) {
velems->adjust_attrib_range |= (1 << i);
}
if (attrib_needs_w_to_1(f)) {
velems->adjust_attrib_w_1 |= (1 << i);
}
}
}
return velems;
}
static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
void *velems)
{
struct svga_context *svga = svga_context(pipe);
struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
svga->curr.velems = svga_velems;
svga->dirty |= SVGA_NEW_VELEMENT;
}
static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
void *velems)
{
FREE(velems);
}
void svga_cleanup_vertex_state( struct svga_context *svga )
{
unsigned i;
for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
}
void svga_init_vertex_functions( struct svga_context *svga )
{
svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
svga->pipe.set_index_buffer = svga_set_index_buffer;
svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
}
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