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/*
* Copyright 2007 VMware, Inc.
* Copyright 2016 Advanced Micro Devices, Inc.
*
* 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
* on 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
* THE AUTHOR(S) AND/OR THEIR 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.
*/
/**
* \file
*
* Common helper functions for PBO up- and downloads.
*/
#include "state_tracker/st_context.h"
#include "state_tracker/st_pbo.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_screen.h"
#include "cso_cache/cso_context.h"
#include "tgsi/tgsi_ureg.h"
void *
st_pbo_create_vs(struct st_context *st)
{
struct ureg_program *ureg;
struct ureg_src in_pos;
struct ureg_src in_instanceid;
struct ureg_dst out_pos;
struct ureg_dst out_layer;
ureg = ureg_create(PIPE_SHADER_VERTEX);
if (!ureg)
return NULL;
in_pos = ureg_DECL_vs_input(ureg, TGSI_SEMANTIC_POSITION);
out_pos = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
if (st->pbo.layers) {
in_instanceid = ureg_DECL_system_value(ureg, TGSI_SEMANTIC_INSTANCEID, 0);
if (!st->pbo.use_gs)
out_layer = ureg_DECL_output(ureg, TGSI_SEMANTIC_LAYER, 0);
}
/* out_pos = in_pos */
ureg_MOV(ureg, out_pos, in_pos);
if (st->pbo.layers) {
if (st->pbo.use_gs) {
/* out_pos.z = i2f(gl_InstanceID) */
ureg_I2F(ureg, ureg_writemask(out_pos, TGSI_WRITEMASK_Z),
ureg_scalar(in_instanceid, TGSI_SWIZZLE_X));
} else {
/* out_layer = gl_InstanceID */
ureg_MOV(ureg, out_layer, in_instanceid);
}
}
ureg_END(ureg);
return ureg_create_shader_and_destroy(ureg, st->pipe);
}
void *
st_pbo_create_gs(struct st_context *st)
{
static const int zero = 0;
struct ureg_program *ureg;
struct ureg_dst out_pos;
struct ureg_dst out_layer;
struct ureg_src in_pos;
struct ureg_src imm;
unsigned i;
ureg = ureg_create(PIPE_SHADER_GEOMETRY);
if (!ureg)
return NULL;
ureg_property(ureg, TGSI_PROPERTY_GS_INPUT_PRIM, PIPE_PRIM_TRIANGLES);
ureg_property(ureg, TGSI_PROPERTY_GS_OUTPUT_PRIM, PIPE_PRIM_TRIANGLE_STRIP);
ureg_property(ureg, TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES, 3);
out_pos = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
out_layer = ureg_DECL_output(ureg, TGSI_SEMANTIC_LAYER, 0);
in_pos = ureg_DECL_input(ureg, TGSI_SEMANTIC_POSITION, 0, 0, 1);
imm = ureg_DECL_immediate_int(ureg, &zero, 1);
for (i = 0; i < 3; ++i) {
struct ureg_src in_pos_vertex = ureg_src_dimension(in_pos, i);
/* out_pos = in_pos[i] */
ureg_MOV(ureg, out_pos, in_pos_vertex);
/* out_layer.x = f2i(in_pos[i].z) */
ureg_F2I(ureg, ureg_writemask(out_layer, TGSI_WRITEMASK_X),
ureg_scalar(in_pos_vertex, TGSI_SWIZZLE_Z));
ureg_EMIT(ureg, ureg_scalar(imm, TGSI_SWIZZLE_X));
}
ureg_END(ureg);
return ureg_create_shader_and_destroy(ureg, st->pipe);
}
void *
st_pbo_create_upload_fs(struct st_context *st)
{
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct ureg_program *ureg;
struct ureg_dst out;
struct ureg_src sampler;
struct ureg_src pos;
struct ureg_src layer;
struct ureg_src const0;
struct ureg_dst temp0;
ureg = ureg_create(PIPE_SHADER_FRAGMENT);
if (!ureg)
return NULL;
out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
sampler = ureg_DECL_sampler(ureg, 0);
if (screen->get_param(screen, PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL)) {
pos = ureg_DECL_system_value(ureg, TGSI_SEMANTIC_POSITION, 0);
} else {
pos = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_POSITION, 0,
TGSI_INTERPOLATE_LINEAR);
}
if (st->pbo.layers) {
layer = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_LAYER, 0,
TGSI_INTERPOLATE_CONSTANT);
}
const0 = ureg_DECL_constant(ureg, 0);
temp0 = ureg_DECL_temporary(ureg);
/* Note: const0 = [ -xoffset + skip_pixels, -yoffset, stride, image_height ] */
/* temp0.xy = f2i(temp0.xy) */
ureg_F2I(ureg, ureg_writemask(temp0, TGSI_WRITEMASK_XY),
ureg_swizzle(pos,
TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y,
TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y));
/* temp0.xy = temp0.xy + const0.xy */
ureg_UADD(ureg, ureg_writemask(temp0, TGSI_WRITEMASK_XY),
ureg_swizzle(ureg_src(temp0),
TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y,
TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y),
ureg_swizzle(const0,
TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y,
TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y));
/* temp0.x = const0.z * temp0.y + temp0.x */
ureg_UMAD(ureg, ureg_writemask(temp0, TGSI_WRITEMASK_X),
ureg_scalar(const0, TGSI_SWIZZLE_Z),
ureg_scalar(ureg_src(temp0), TGSI_SWIZZLE_Y),
ureg_scalar(ureg_src(temp0), TGSI_SWIZZLE_X));
if (st->pbo.layers) {
/* temp0.x = const0.w * layer + temp0.x */
ureg_UMAD(ureg, ureg_writemask(temp0, TGSI_WRITEMASK_X),
ureg_scalar(const0, TGSI_SWIZZLE_W),
ureg_scalar(layer, TGSI_SWIZZLE_X),
ureg_scalar(ureg_src(temp0), TGSI_SWIZZLE_X));
}
/* temp0.w = 0 */
ureg_MOV(ureg, ureg_writemask(temp0, TGSI_WRITEMASK_W), ureg_imm1u(ureg, 0));
/* out = txf(sampler, temp0.x) */
ureg_TXF(ureg, out, TGSI_TEXTURE_BUFFER, ureg_src(temp0), sampler);
ureg_release_temporary(ureg, temp0);
ureg_END(ureg);
return ureg_create_shader_and_destroy(ureg, pipe);
}
void
st_init_pbo_helpers(struct st_context *st)
{
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
st->pbo.upload_enabled =
screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS) &&
screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT) >= 1 &&
screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_INTEGERS);
if (!st->pbo.upload_enabled)
return;
st->pbo.rgba_only =
screen->get_param(screen, PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY);
if (screen->get_param(screen, PIPE_CAP_TGSI_INSTANCEID)) {
if (screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
st->pbo.layers = true;
} else if (screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES) >= 3) {
st->pbo.layers = true;
st->pbo.use_gs = true;
}
}
/* Blend state */
memset(&st->pbo.upload_blend, 0, sizeof(struct pipe_blend_state));
st->pbo.upload_blend.rt[0].colormask = PIPE_MASK_RGBA;
/* Rasterizer state */
memset(&st->pbo.raster, 0, sizeof(struct pipe_rasterizer_state));
st->pbo.raster.half_pixel_center = 1;
}
void
st_destroy_pbo_helpers(struct st_context *st)
{
if (st->pbo.upload_fs) {
cso_delete_fragment_shader(st->cso_context, st->pbo.upload_fs);
st->pbo.upload_fs = NULL;
}
if (st->pbo.gs) {
cso_delete_geometry_shader(st->cso_context, st->pbo.gs);
st->pbo.gs = NULL;
}
if (st->pbo.vs) {
cso_delete_vertex_shader(st->cso_context, st->pbo.vs);
st->pbo.vs = NULL;
}
}
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