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// Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB).
// Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT3DRENDER_RENDER_RHI_SUBMISSIONCONTEXT_H
#define QT3DRENDER_RENDER_RHI_SUBMISSIONCONTEXT_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <rhibuffer_p.h>
#include <Qt3DRender/qclearbuffers.h>
#include <Qt3DRender/private/handle_types_p.h>
#include <Qt3DRender/qblitframebuffer.h>
#include <Qt3DRender/private/shader_p.h>
#include <Qt3DRender/private/statemask_p.h>
#include <Qt3DRender/private/qgraphicsapifilter_p.h>
#include <shaderparameterpack_p.h>
#include <shadervariables_p.h>
#include <rhihandle_types_p.h>
#include <QSurface>
#include <QOffscreenSurface>
#include <rhi/qrhi.h>
QT_BEGIN_NAMESPACE
class QAbstractOpenGLFunctions;
namespace Qt3DRender {
namespace Render {
class Material;
class AttachmentPack;
class Attribute;
class Buffer;
class ShaderManager;
struct StateVariant;
class RenderTarget;
class RenderStateSet;
namespace Rhi {
class Renderer;
class GraphicsHelperInterface;
class RHITexture;
class RHIShader;
class RHIShaderManager;
class RenderCommand;
typedef QPair<QString, int> NamedUniformLocation;
class Q_AUTOTEST_EXPORT SubmissionContext
{
public:
enum Feature {
MRT = 0,
Tessellation,
UniformBufferObject,
BindableFragmentOutputs,
PrimitiveRestart,
RenderBufferDimensionRetrieval,
TextureDimensionRetrieval,
ShaderStorageObject,
Compute,
DrawBuffersBlend,
BlitFramebuffer,
IndirectDrawing,
MapBuffer,
Fences,
ShaderImage
};
enum FBOBindMode { FBODraw, FBORead, FBOReadAndDraw };
SubmissionContext();
~SubmissionContext();
void initialize();
int id() const; // unique, small integer ID of this context
void setRenderer(Renderer *renderer) { m_renderer = renderer; }
void setDrivenExternally(bool drivenExternally);
bool drivenExternally() const;
bool beginDrawing(QSurface *surface);
void endDrawing(bool swapBuffers);
void releaseResources();
void setOpenGLContext(QOpenGLContext *ctx);
void setRHIContext(QRhi *ctx);
void setDefaultRenderTarget(QRhiRenderTarget *target);
void setCommandBuffer(QRhiCommandBuffer *commandBuffer);
bool isInitialized() const { return m_initialized; }
const GraphicsApiFilterData *contextInfo() const;
// Shaders
struct ShaderCreationInfo
{
bool linkSucceeded = false;
QString logs;
};
ShaderCreationInfo createShaderProgram(RHIShader *shaderNode);
void loadShader(Shader *shader, ShaderManager *shaderManager,
RHIShaderManager *rhiShaderManager);
// FBO
QImage readFramebuffer(const QRect &rect);
void blitFramebuffer(Qt3DCore::QNodeId outputRenderTargetId,
Qt3DCore::QNodeId inputRenderTargetId, QRect inputRect, QRect outputRect,
uint defaultFboId,
QRenderTargetOutput::AttachmentPoint inputAttachmentPoint,
QRenderTargetOutput::AttachmentPoint outputAttachmentPoint,
QBlitFramebuffer::InterpolationMethod interpolationMethod);
// Attributes
void specifyAttribute(const Attribute *attribute, Buffer *buffer,
const ShaderAttribute *attributeDescription);
void specifyIndices(Buffer *buffer);
// Buffer
void updateBuffer(Buffer *buffer);
QByteArray downloadBufferContent(Buffer *buffer);
void releaseBuffer(Qt3DCore::QNodeId bufferId);
bool hasRHIBufferForBuffer(Buffer *buffer);
RHIBuffer *rhiBufferForRenderBuffer(Buffer *buf);
// RenderState
void applyStateSet(const RenderStateSet *ss, QRhiGraphicsPipeline *graphicsPipeline);
StateVariant *getState(RenderStateSet *ss, StateMask type) const;
// Swap chain
struct SwapChainInfo
{
QRhiSwapChain *swapChain = nullptr;
QRhiRenderBuffer *renderBuffer = nullptr;
QRhiRenderPassDescriptor *renderPassDescriptor = nullptr;
};
SwapChainInfo *swapChainForSurface(QSurface *surface) noexcept;
QRhiResourceUpdateBatch *m_currentUpdates {};
QRhi *rhi() const { return m_rhi; }
QRhiCommandBuffer *currentFrameCommandBuffer() const;
QRhiRenderTarget *currentFrameRenderTarget() const;
QRhiRenderTarget *defaultRenderTarget() const;
QRhiRenderPassDescriptor *currentRenderPassDescriptor() const;
QRhiSwapChain *currentSwapChain() const;
QSurfaceFormat format() const noexcept;
private:
// FBO
void bindFrameBufferAttachmentHelper(GLuint fboId, const AttachmentPack &attachments);
void activateDrawBuffers(const AttachmentPack &attachments);
// Buffers
HRHIBuffer createRHIBufferFor(Buffer *buffer);
void uploadDataToRHIBuffer(Buffer *buffer, RHIBuffer *b);
QByteArray downloadDataFromRHIBuffer(Buffer *buffer, RHIBuffer *b);
bool bindRHIBuffer(RHIBuffer *buffer, RHIBuffer::Type type);
// States
void applyState(const StateVariant &state, QRhiGraphicsPipeline *graphicsPipeline);
bool m_initialized;
bool m_ownsRhiCtx;
bool m_drivenExternally;
QHash<Qt3DCore::QNodeId, HRHIBuffer> m_renderBufferHash;
Material *m_material;
Renderer *m_renderer;
GraphicsApiFilterData m_contextInfo;
QRhi *m_rhi;
QHash<QSurface *, SwapChainInfo> m_swapChains;
QRhiSwapChain *m_currentSwapChain;
QRhiRenderPassDescriptor *m_currentRenderPassDescriptor;
QRhiRenderTarget *m_defaultRenderTarget;
QRhiCommandBuffer *m_defaultCommandBuffer;
#ifndef QT_NO_OPENGL
QOffscreenSurface *m_fallbackSurface;
#endif
};
} // namespace Rhi
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // QT3DRENDER_RENDER_RHI_SUBMISSIONCONTEXT_H
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