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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
/** \file
* \ingroup draw
*/
#include "BKE_global.h"
#include "GPU_compute.h"
#include "draw_manager.h"
#include "draw_manager.hh"
#include "draw_pass.hh"
#include "draw_shader.h"
namespace blender::draw {
Manager::~Manager()
{
for (GPUTexture *texture : acquired_textures) {
/* Decrease refcount and free if 0. */
GPU_texture_free(texture);
}
}
void Manager::begin_sync()
{
/* TODO: This means the reference is kept until further redraw or manager teardown. Instead, they
* should be released after each draw loop. But for now, mimics old DRW behavior. */
for (GPUTexture *texture : acquired_textures) {
/* Decrease refcount and free if 0. */
GPU_texture_free(texture);
}
acquired_textures.clear();
#ifdef DEBUG
/* Detect non-init data. */
memset(matrix_buf.data(), 0xF0, resource_len_ * sizeof(*matrix_buf.data()));
memset(bounds_buf.data(), 0xF0, resource_len_ * sizeof(*bounds_buf.data()));
memset(infos_buf.data(), 0xF0, resource_len_ * sizeof(*infos_buf.data()));
#endif
resource_len_ = 0;
/* TODO(fclem): Resize buffers if too big, but with an hysteresis threshold. */
object_active = DST.draw_ctx.obact;
/* Init the 0 resource. */
resource_handle(float4x4::identity());
}
void Manager::end_sync()
{
matrix_buf.push_update();
bounds_buf.push_update();
infos_buf.push_update();
/* Dispatch compute to finalize the resources on GPU. Save a bit of CPU time. */
uint thread_groups = divide_ceil_u(resource_len_, DRW_FINALIZE_GROUP_SIZE);
GPUShader *shader = DRW_shader_draw_resource_finalize_get();
GPU_shader_bind(shader);
GPU_shader_uniform_1i(shader, "resource_len", resource_len_);
GPU_storagebuf_bind(matrix_buf, 0);
GPU_storagebuf_bind(bounds_buf, 1);
GPU_storagebuf_bind(infos_buf, 2);
GPU_compute_dispatch(shader, thread_groups, 1, 1);
GPU_memory_barrier(GPU_BARRIER_SHADER_STORAGE);
}
void Manager::submit(PassSimple &pass, View &view)
{
view.bind();
command::RecordingState state;
pass.draw_commands_buf_.bind(state, pass.headers_, pass.commands_, view.visibility_buf_);
GPU_storagebuf_bind(matrix_buf, DRW_OBJ_MAT_SLOT);
GPU_storagebuf_bind(infos_buf, DRW_OBJ_INFOS_SLOT);
// GPU_storagebuf_bind(attribute_buf, DRW_OBJ_ATTR_SLOT); /* TODO */
pass.submit(state);
}
void Manager::submit(PassMain &pass, View &view)
{
view.bind();
view.compute_visibility(bounds_buf, resource_len_);
command::RecordingState state;
pass.draw_commands_buf_.bind(state, pass.headers_, pass.commands_, view.visibility_buf_);
GPU_storagebuf_bind(matrix_buf, DRW_OBJ_MAT_SLOT);
GPU_storagebuf_bind(infos_buf, DRW_OBJ_INFOS_SLOT);
// GPU_storagebuf_bind(attribute_buf, DRW_OBJ_ATTR_SLOT); /* TODO */
pass.submit(state);
if (G.debug & G_DEBUG_GPU) {
GPU_storagebuf_unbind_all();
GPU_texture_image_unbind_all();
GPU_texture_unbind_all();
GPU_uniformbuf_unbind_all();
}
}
Manager::SubmitDebugOutput Manager::submit_debug(PassSimple &pass, View &view)
{
submit(pass, view);
pass.draw_commands_buf_.resource_id_buf_.read();
Manager::SubmitDebugOutput output;
output.resource_id = {pass.draw_commands_buf_.resource_id_buf_.data(),
pass.draw_commands_buf_.resource_id_count_};
/* There is no visibility data for PassSimple. */
output.visibility = {(uint *)view.visibility_buf_.data(), 0};
return output;
}
Manager::SubmitDebugOutput Manager::submit_debug(PassMain &pass, View &view)
{
submit(pass, view);
GPU_finish();
pass.draw_commands_buf_.resource_id_buf_.read();
view.visibility_buf_.read();
Manager::SubmitDebugOutput output;
output.resource_id = {pass.draw_commands_buf_.resource_id_buf_.data(),
pass.draw_commands_buf_.resource_id_count_};
output.visibility = {(uint *)view.visibility_buf_.data(), divide_ceil_u(resource_len_, 32)};
return output;
}
Manager::DataDebugOutput Manager::data_debug()
{
matrix_buf.read();
bounds_buf.read();
infos_buf.read();
Manager::DataDebugOutput output;
output.matrices = {matrix_buf.data(), resource_len_};
output.bounds = {bounds_buf.data(), resource_len_};
output.infos = {infos_buf.data(), resource_len_};
return output;
}
} // namespace blender::draw
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