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322 lines
11 KiB
C++
322 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_COMPOSITOROGL_H
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#define MOZILLA_GFX_COMPOSITOROGL_H
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#include "GLContextTypes.h" // for GLContext, etc
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#include "GLDefs.h" // for GLuint, LOCAL_GL_TEXTURE_2D, etc
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#include "OGLShaderProgram.h" // for ShaderProgramOGL, etc
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#include "Units.h" // for ScreenPoint
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#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
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#include "mozilla/Attributes.h" // for MOZ_OVERRIDE, MOZ_FINAL
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#include "mozilla/RefPtr.h" // for TemporaryRef, RefPtr
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#include "mozilla/gfx/2D.h" // for DrawTarget
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#include "mozilla/gfx/BaseSize.h" // for BaseSize
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#include "mozilla/gfx/Point.h" // for IntSize, Point
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#include "mozilla/gfx/Rect.h" // for Rect, IntRect
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#include "mozilla/gfx/Types.h" // for Float, SurfaceFormat, etc
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#include "mozilla/layers/Compositor.h" // for SurfaceInitMode, Compositor, etc
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#include "mozilla/layers/CompositorTypes.h" // for MaskType::NumMaskTypes, etc
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#include "mozilla/layers/LayersTypes.h"
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#include "nsAutoPtr.h" // for nsRefPtr, nsAutoPtr
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#include "nsCOMPtr.h" // for already_AddRefed
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#include "nsDebug.h" // for NS_ASSERTION, NS_WARNING
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#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
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#include "nsSize.h" // for nsIntSize
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#include "nsTArray.h" // for nsAutoTArray, nsTArray, etc
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#include "nsThreadUtils.h" // for nsRunnable
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#include "nsXULAppAPI.h" // for XRE_GetProcessType
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#include "nscore.h" // for NS_IMETHOD
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#include "VBOArena.h" // for gl::VBOArena
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class gfx3DMatrix;
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class nsIWidget;
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namespace mozilla {
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class TimeStamp;
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namespace gfx {
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class Matrix4x4;
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}
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namespace layers {
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class CompositingRenderTarget;
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class CompositingRenderTargetOGL;
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class DataTextureSource;
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class GLManagerCompositor;
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class TextureSource;
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struct Effect;
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struct EffectChain;
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class CompositorOGL : public Compositor
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{
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typedef mozilla::gl::GLContext GLContext;
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friend class GLManagerCompositor;
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std::map<ShaderConfigOGL, ShaderProgramOGL*> mPrograms;
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public:
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CompositorOGL(nsIWidget *aWidget, int aSurfaceWidth = -1, int aSurfaceHeight = -1,
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bool aUseExternalSurfaceSize = false);
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virtual ~CompositorOGL();
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virtual TemporaryRef<DataTextureSource>
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CreateDataTextureSource(TextureFlags aFlags = 0) MOZ_OVERRIDE;
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virtual bool Initialize() MOZ_OVERRIDE;
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virtual void Destroy() MOZ_OVERRIDE;
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virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() MOZ_OVERRIDE
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{
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return TextureFactoryIdentifier(LayersBackend::LAYERS_OPENGL,
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XRE_GetProcessType(),
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GetMaxTextureSize(),
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mFBOTextureTarget == LOCAL_GL_TEXTURE_2D,
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SupportsPartialTextureUpdate());
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}
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virtual TemporaryRef<CompositingRenderTarget>
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CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) MOZ_OVERRIDE;
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virtual TemporaryRef<CompositingRenderTarget>
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CreateRenderTargetFromSource(const gfx::IntRect &aRect,
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const CompositingRenderTarget *aSource,
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const gfx::IntPoint &aSourcePoint) MOZ_OVERRIDE;
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virtual void SetRenderTarget(CompositingRenderTarget *aSurface) MOZ_OVERRIDE;
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virtual CompositingRenderTarget* GetCurrentRenderTarget() MOZ_OVERRIDE;
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virtual void DrawQuad(const gfx::Rect& aRect,
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const gfx::Rect& aClipRect,
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const EffectChain &aEffectChain,
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gfx::Float aOpacity,
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const gfx::Matrix4x4 &aTransform) MOZ_OVERRIDE
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{
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DrawQuadInternal(aRect, aClipRect, aEffectChain,
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aOpacity, aTransform, LOCAL_GL_TRIANGLE_STRIP);
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}
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virtual void DrawLines(const std::vector<gfx::Point>& aLines,
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const gfx::Rect& aClipRect,
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const gfx::Color& aColor,
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gfx::Float aOpacity,
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const gfx::Matrix4x4 &aTransform) MOZ_OVERRIDE;
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virtual void EndFrame() MOZ_OVERRIDE;
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virtual void EndFrameForExternalComposition(const gfx::Matrix& aTransform) MOZ_OVERRIDE;
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virtual void AbortFrame() MOZ_OVERRIDE;
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virtual bool SupportsPartialTextureUpdate() MOZ_OVERRIDE;
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virtual bool CanUseCanvasLayerForSize(const gfx::IntSize &aSize) MOZ_OVERRIDE
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{
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if (!mGLContext)
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return false;
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int32_t maxSize = GetMaxTextureSize();
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return aSize <= gfx::IntSize(maxSize, maxSize);
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}
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virtual int32_t GetMaxTextureSize() const MOZ_OVERRIDE;
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/**
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* Set the size of the EGL surface we're rendering to, if we're rendering to
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* an EGL surface.
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*/
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virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) MOZ_OVERRIDE;
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virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) MOZ_OVERRIDE {
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mRenderOffset = aOffset;
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}
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virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) MOZ_OVERRIDE;
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virtual void SetTargetContext(gfx::DrawTarget* aTarget) MOZ_OVERRIDE
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{
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mTarget = aTarget;
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}
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virtual void PrepareViewport(const gfx::IntSize& aSize,
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const gfx::Matrix& aWorldTransform) MOZ_OVERRIDE;
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#ifdef MOZ_DUMP_PAINTING
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virtual const char* Name() const MOZ_OVERRIDE { return "OGL"; }
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#endif // MOZ_DUMP_PAINTING
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virtual LayersBackend GetBackendType() const MOZ_OVERRIDE {
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return LayersBackend::LAYERS_OPENGL;
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}
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virtual void Pause() MOZ_OVERRIDE;
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virtual bool Resume() MOZ_OVERRIDE;
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virtual nsIWidget* GetWidget() const MOZ_OVERRIDE { return mWidget; }
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GLContext* gl() const { return mGLContext; }
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gfx::SurfaceFormat GetFBOFormat() const {
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return gfx::SurfaceFormat::R8G8B8A8;
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}
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/**
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* The compositor provides with temporary textures for use with direct
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* textruing like gralloc texture.
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* Doing so lets us use gralloc the way it has been designed to be used
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* (see https://wiki.mozilla.org/Platform/GFX/Gralloc)
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*/
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GLuint GetTemporaryTexture(GLenum aUnit);
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const gfx::Matrix4x4& GetProjMatrix() const {
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return mProjMatrix;
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}
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private:
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virtual void DrawQuadInternal(const gfx::Rect& aRect,
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const gfx::Rect& aClipRect,
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const EffectChain &aEffectChain,
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gfx::Float aOpacity,
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const gfx::Matrix4x4 &aTransformi,
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GLuint aDrawMode);
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/**
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* Context target, nullptr when drawing directly to our swap chain.
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*/
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RefPtr<gfx::DrawTarget> mTarget;
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/** Widget associated with this compositor */
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nsIWidget *mWidget;
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nsIntSize mWidgetSize;
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nsRefPtr<GLContext> mGLContext;
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gfx::Matrix4x4 mProjMatrix;
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/** The size of the surface we are rendering to */
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nsIntSize mSurfaceSize;
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ScreenPoint mRenderOffset;
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already_AddRefed<mozilla::gl::GLContext> CreateContext();
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/** Texture target to use for FBOs */
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GLenum mFBOTextureTarget;
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/** Currently bound render target */
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RefPtr<CompositingRenderTargetOGL> mCurrentRenderTarget;
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#ifdef DEBUG
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CompositingRenderTargetOGL* mWindowRenderTarget;
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#endif
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/** VBO that has some basics in it for a textured quad,
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* including vertex coords and texcoords for both
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* flipped and unflipped textures */
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GLuint mQuadVBO;
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/**
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* When we can't use mQuadVBO, we allocate VBOs from this arena instead.
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*/
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gl::VBOArena mVBOs;
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bool mHasBGRA;
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/**
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* When rendering to some EGL surfaces (e.g. on Android), we rely on being told
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* about size changes (via SetSurfaceSize) rather than pulling this information
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* from the widget.
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*/
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bool mUseExternalSurfaceSize;
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/**
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* Have we had DrawQuad calls since the last frame was rendered?
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*/
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bool mFrameInProgress;
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/*
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* Clear aRect on FrameBuffer.
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*/
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virtual void clearFBRect(const gfx::Rect* aRect);
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/* Start a new frame. If aClipRectIn is null and aClipRectOut is non-null,
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* sets *aClipRectOut to the screen dimensions.
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*/
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virtual void BeginFrame(const nsIntRegion& aInvalidRegion,
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const gfx::Rect *aClipRectIn,
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const gfx::Matrix& aTransform,
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const gfx::Rect& aRenderBounds,
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gfx::Rect *aClipRectOut = nullptr,
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gfx::Rect *aRenderBoundsOut = nullptr) MOZ_OVERRIDE;
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ShaderConfigOGL GetShaderConfigFor(Effect *aEffect, MaskType aMask = MaskNone) const;
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ShaderProgramOGL* GetShaderProgramFor(const ShaderConfigOGL &aConfig);
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/**
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* Create a FBO backed by a texture.
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* Note that the texture target type will be
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* of the type returned by FBOTextureTarget; different
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* shaders are required to sample from the different
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* texture types.
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*/
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void CreateFBOWithTexture(const gfx::IntRect& aRect, bool aCopyFromSource,
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GLuint aSourceFrameBuffer,
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GLuint *aFBO, GLuint *aTexture);
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GLintptr QuadVBOVertexOffset() { return 0; }
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GLintptr QuadVBOTexCoordOffset() { return sizeof(float)*4*2; }
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GLintptr QuadVBOFlippedTexCoordOffset() { return sizeof(float)*8*2; }
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void BindQuadVBO();
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void QuadVBOVerticesAttrib(GLuint aAttribIndex);
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void QuadVBOTexCoordsAttrib(GLuint aAttribIndex);
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void QuadVBOFlippedTexCoordsAttrib(GLuint aAttribIndex);
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void BindAndDrawQuad(GLuint aVertAttribIndex,
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GLuint aTexCoordAttribIndex,
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bool aFlipped = false,
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GLuint aDrawMode = LOCAL_GL_TRIANGLE_STRIP);
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void BindAndDrawQuad(ShaderProgramOGL *aProg,
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bool aFlipped = false,
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GLuint aDrawMode = LOCAL_GL_TRIANGLE_STRIP);
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void BindAndDrawQuadWithTextureRect(ShaderProgramOGL *aProg,
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const gfx3DMatrix& aTextureTransform,
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const gfx::Rect& aTexCoordRect,
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TextureSource *aTexture);
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void CleanupResources();
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/**
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* Copies the content of our backbuffer to the set transaction target.
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* Does not restore the target FBO, so only call from EndFrame.
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*/
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void CopyToTarget(gfx::DrawTarget* aTarget, const gfx::Matrix& aWorldMatrix);
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/**
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* Implements the flipping of the y-axis to convert from layers/compositor
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* coordinates to OpenGL coordinates.
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*
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* Indeed, the only coordinate system that OpenGL knows has the y-axis
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* pointing upwards, but the layers/compositor coordinate system has the
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* y-axis pointing downwards, for good reason as Web pages are typically
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* scrolled downwards. So, some flipping has to take place; FlippedY does it.
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*/
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GLint FlipY(GLint y) const { return mHeight - y; }
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bool mDestroyed;
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// Textures used for direct texturing of buffers like gralloc.
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// The index of the texture in this array must correspond to the texture unit.
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nsTArray<GLuint> mTextures;
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/**
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* Height of the OpenGL context's primary framebuffer in pixels. Used by
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* FlipY for the y-flipping calculation.
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*/
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GLint mHeight;
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};
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}
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}
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#endif /* MOZILLA_GFX_COMPOSITOROGL_H */
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