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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "impeller/renderer/command.h"
#include <utility>
#include "impeller/base/validation.h"
#include "impeller/renderer/formats.h"
#include "impeller/renderer/vertex_descriptor.h"
namespace impeller {
bool Command::BindVertices(const VertexBuffer& buffer) {
if (buffer.index_type == IndexType::kUnknown) {
VALIDATION_LOG << "Cannot bind vertex buffer with an unknown index type.";
return false;
}
vertex_bindings.buffers[VertexDescriptor::kReservedVertexBufferIndex] = {
nullptr, buffer.vertex_buffer};
index_buffer = buffer.index_buffer;
index_count = buffer.index_count;
index_type = buffer.index_type;
return true;
}
BufferView Command::GetVertexBuffer() const {
auto found = vertex_bindings.buffers.find(
VertexDescriptor::kReservedVertexBufferIndex);
if (found != vertex_bindings.buffers.end()) {
return found->second.resource;
}
return {};
}
bool Command::BindResource(ShaderStage stage,
const ShaderUniformSlot& slot,
const ShaderMetadata& metadata,
const BufferView& view) {
if (!view) {
return false;
}
switch (stage) {
case ShaderStage::kVertex:
vertex_bindings.uniforms[slot.ext_res_0] = slot;
vertex_bindings.buffers[slot.ext_res_0] = {&metadata, view};
return true;
case ShaderStage::kFragment:
fragment_bindings.uniforms[slot.ext_res_0] = slot;
fragment_bindings.buffers[slot.ext_res_0] = {&metadata, view};
return true;
case ShaderStage::kCompute:
VALIDATION_LOG << "Use ComputeCommands for compute shader stages.";
case ShaderStage::kTessellationControl:
case ShaderStage::kTessellationEvaluation:
case ShaderStage::kUnknown:
return false;
}
return false;
}
bool Command::BindResource(ShaderStage stage,
const SampledImageSlot& slot,
const ShaderMetadata& metadata,
const std::shared_ptr<const Texture>& texture) {
if (!texture || !texture->IsValid()) {
return false;
}
if (!slot.HasTexture()) {
return true;
}
switch (stage) {
case ShaderStage::kVertex:
vertex_bindings.textures[slot.texture_index] = {&metadata, texture};
return true;
case ShaderStage::kFragment:
fragment_bindings.textures[slot.texture_index] = {&metadata, texture};
return true;
case ShaderStage::kCompute:
VALIDATION_LOG << "Use ComputeCommands for compute shader stages.";
case ShaderStage::kTessellationControl:
case ShaderStage::kTessellationEvaluation:
case ShaderStage::kUnknown:
return false;
}
return false;
}
bool Command::BindResource(ShaderStage stage,
const SampledImageSlot& slot,
const ShaderMetadata& metadata,
const std::shared_ptr<const Sampler>& sampler) {
if (!sampler || !sampler->IsValid()) {
return false;
}
if (!slot.HasSampler()) {
return true;
}
switch (stage) {
case ShaderStage::kVertex:
vertex_bindings.samplers[slot.sampler_index] = {&metadata, sampler};
return true;
case ShaderStage::kFragment:
fragment_bindings.samplers[slot.sampler_index] = {&metadata, sampler};
return true;
case ShaderStage::kCompute:
VALIDATION_LOG << "Use ComputeCommands for compute shader stages.";
case ShaderStage::kUnknown:
case ShaderStage::kTessellationControl:
case ShaderStage::kTessellationEvaluation:
return false;
}
return false;
}
bool Command::BindResource(ShaderStage stage,
const SampledImageSlot& slot,
const ShaderMetadata& metadata,
const std::shared_ptr<const Texture>& texture,
const std::shared_ptr<const Sampler>& sampler) {
return BindResource(stage, slot, metadata, texture) &&
BindResource(stage, slot, metadata, sampler);
}
} // namespace impeller