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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.
#pragma once
#include <functional>
#include <map>
#include <optional>
#include "flutter/fml/macros.h"
#include "impeller/core/allocator.h"
#include "impeller/core/formats.h"
#include "impeller/geometry/size.h"
namespace impeller {
class Context;
class RenderTarget final {
public:
struct AttachmentConfig {
StorageMode storage_mode;
LoadAction load_action;
StoreAction store_action;
Color clear_color;
};
struct AttachmentConfigMSAA {
StorageMode storage_mode;
StorageMode resolve_storage_mode;
LoadAction load_action;
StoreAction store_action;
Color clear_color;
};
static constexpr AttachmentConfig kDefaultColorAttachmentConfig = {
.storage_mode = StorageMode::kDevicePrivate,
.load_action = LoadAction::kClear,
.store_action = StoreAction::kStore,
.clear_color = Color::BlackTransparent()};
static constexpr AttachmentConfigMSAA kDefaultColorAttachmentConfigMSAA = {
.storage_mode = StorageMode::kDeviceTransient,
.resolve_storage_mode = StorageMode::kDevicePrivate,
.load_action = LoadAction::kClear,
.store_action = StoreAction::kMultisampleResolve,
.clear_color = Color::BlackTransparent()};
static constexpr AttachmentConfig kDefaultStencilAttachmentConfig = {
.storage_mode = StorageMode::kDeviceTransient,
.load_action = LoadAction::kClear,
.store_action = StoreAction::kDontCare,
.clear_color = Color::BlackTransparent()};
static RenderTarget CreateOffscreen(
const Context& context,
ISize size,
const std::string& label = "Offscreen",
AttachmentConfig color_attachment_config = kDefaultColorAttachmentConfig,
std::optional<AttachmentConfig> stencil_attachment_config =
kDefaultStencilAttachmentConfig);
static RenderTarget CreateOffscreenMSAA(
const Context& context,
ISize size,
const std::string& label = "Offscreen MSAA",
AttachmentConfigMSAA color_attachment_config =
kDefaultColorAttachmentConfigMSAA,
std::optional<AttachmentConfig> stencil_attachment_config =
kDefaultStencilAttachmentConfig);
RenderTarget();
~RenderTarget();
bool IsValid() const;
SampleCount GetSampleCount() const;
bool HasColorAttachment(size_t index) const;
ISize GetRenderTargetSize() const;
std::shared_ptr<Texture> GetRenderTargetTexture() const;
PixelFormat GetRenderTargetPixelFormat() const;
std::optional<ISize> GetColorAttachmentSize(size_t index) const;
RenderTarget& SetColorAttachment(const ColorAttachment& attachment,
size_t index);
RenderTarget& SetDepthAttachment(std::optional<DepthAttachment> attachment);
RenderTarget& SetStencilAttachment(
std::optional<StencilAttachment> attachment);
size_t GetMaxColorAttacmentBindIndex() const;
const std::map<size_t, ColorAttachment>& GetColorAttachments() const;
const std::optional<DepthAttachment>& GetDepthAttachment() const;
const std::optional<StencilAttachment>& GetStencilAttachment() const;
size_t GetTotalAttachmentCount() const;
void IterateAllAttachments(
const std::function<bool(const Attachment& attachment)>& iterator) const;
std::string ToString() const;
private:
std::map<size_t, ColorAttachment> colors_;
std::optional<DepthAttachment> depth_;
std::optional<StencilAttachment> stencil_;
};
} // namespace impeller