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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup gpu
*/
#include "BKE_global.h"
#include "BLI_string.h"
#include "gpu_backend.hh"
#include "gpu_context_private.hh"
#include "mtl_backend.hh"
#include "mtl_context.hh"
#include "mtl_debug.hh"
#include "mtl_uniform_buffer.hh"
namespace blender::gpu {
MTLUniformBuf::MTLUniformBuf(size_t size, const char *name) : UniformBuf(size, name)
{
}
MTLUniformBuf::~MTLUniformBuf()
{
if (metal_buffer_ != nullptr) {
metal_buffer_->free();
metal_buffer_ = nullptr;
}
has_data_ = false;
/* Ensure UBO is not bound to active CTX.
* UBO bindings are reset upon Context-switch so we do not need
* to check deactivated context's. */
MTLContext *ctx = MTLContext::get();
if (ctx) {
for (int i = 0; i < MTL_MAX_UNIFORM_BUFFER_BINDINGS; i++) {
MTLUniformBufferBinding &slot = ctx->pipeline_state.ubo_bindings[i];
if (slot.bound && slot.ubo == this) {
slot.bound = false;
slot.ubo = nullptr;
}
}
}
}
void MTLUniformBuf::update(const void *data)
{
BLI_assert(this);
BLI_assert(size_in_bytes_ > 0);
/* Free existing allocation.
* The previous UBO resource will be tracked by the memory manager,
* in case dependent GPU work is still executing. */
if (metal_buffer_ != nullptr) {
metal_buffer_->free();
metal_buffer_ = nullptr;
}
/* Allocate MTL buffer */
MTLContext *ctx = static_cast<MTLContext *>(unwrap(GPU_context_active_get()));
BLI_assert(ctx);
BLI_assert(ctx->device);
UNUSED_VARS_NDEBUG(ctx);
if (data != nullptr) {
metal_buffer_ = MTLContext::get_global_memory_manager().allocate_with_data(
size_in_bytes_, true, data);
has_data_ = true;
metal_buffer_->set_label(@"Uniform Buffer");
BLI_assert(metal_buffer_ != nullptr);
BLI_assert(metal_buffer_->get_metal_buffer() != nil);
}
else {
/* If data is not yet present, no buffer will be allocated and MTLContext will use an empty
* null buffer, containing zeroes, if the UBO is bound. */
metal_buffer_ = nullptr;
has_data_ = false;
}
}
void MTLUniformBuf::bind(int slot)
{
if (slot < 0) {
MTL_LOG_WARNING("Failed to bind UBO %p. uniform location %d invalid.\n", this, slot);
return;
}
BLI_assert(slot < MTL_MAX_UNIFORM_BUFFER_BINDINGS);
/* Bind current UBO to active context. */
MTLContext *ctx = MTLContext::get();
BLI_assert(ctx);
MTLUniformBufferBinding &ctx_ubo_bind_slot = ctx->pipeline_state.ubo_bindings[slot];
ctx_ubo_bind_slot.ubo = this;
ctx_ubo_bind_slot.bound = true;
bind_slot_ = slot;
bound_ctx_ = ctx;
/* Check if we have any deferred data to upload. */
if (data_ != nullptr) {
this->update(data_);
MEM_SAFE_FREE(data_);
}
/* Ensure there is at least an empty dummy buffer. */
if (metal_buffer_ == nullptr) {
this->update(nullptr);
}
}
void MTLUniformBuf::unbind()
{
/* Unbind in debug mode to validate missing binds.
* Otherwise, only perform a full unbind upon destruction
* to ensure no lingering references. */
#ifndef NDEBUG
if (true) {
#else
if (G.debug & G_DEBUG_GPU) {
#endif
if (bound_ctx_ != nullptr && bind_slot_ > -1) {
MTLUniformBufferBinding &ctx_ubo_bind_slot =
bound_ctx_->pipeline_state.ubo_bindings[bind_slot_];
if (ctx_ubo_bind_slot.bound && ctx_ubo_bind_slot.ubo == this) {
ctx_ubo_bind_slot.bound = false;
ctx_ubo_bind_slot.ubo = nullptr;
}
}
}
/* Reset bind index. */
bind_slot_ = -1;
bound_ctx_ = nullptr;
}
id<MTLBuffer> MTLUniformBuf::get_metal_buffer(int *r_offset)
{
BLI_assert(this);
*r_offset = 0;
if (metal_buffer_ != nullptr && has_data_) {
*r_offset = 0;
metal_buffer_->debug_ensure_used();
return metal_buffer_->get_metal_buffer();
}
else {
*r_offset = 0;
return nil;
}
}
int MTLUniformBuf::get_size()
{
BLI_assert(this);
return size_in_bytes_;
}
} // blender::gpu
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