/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGpuGL_DEFINED
#define GrGpuGL_DEFINED
#include "GrBinHashKey.h"
#include "GrDrawState.h"
#include "GrGpu.h"
#include "GrGLContextInfo.h"
#include "GrGLIndexBuffer.h"
#include "GrGLIRect.h"
#include "GrGLProgram.h"
#include "GrGLStencilBuffer.h"
#include "GrGLTexture.h"
#include "GrGLVertexBuffer.h"
#include "../GrTHashCache.h"
class GrGpuGL : public GrGpu {
public:
GrGpuGL(const GrGLContextInfo& ctxInfo);
virtual ~GrGpuGL();
const GrGLInterface* glInterface() const {
return fGLContextInfo.interface();
}
GrGLBinding glBinding() const { return fGLContextInfo.binding(); }
GrGLVersion glVersion() const { return fGLContextInfo.version(); }
GrGLSLGeneration glslGeneration() const {
return fGLContextInfo.glslGeneration();
}
// Used by GrGLProgram to bind necessary textures for GrGLEffects.
void bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture);
bool programUnitTest();
// GrGpu overrides
virtual GrPixelConfig preferredReadPixelsConfig(GrPixelConfig config)
const SK_OVERRIDE;
virtual GrPixelConfig preferredWritePixelsConfig(GrPixelConfig config)
const SK_OVERRIDE;
virtual bool readPixelsWillPayForYFlip(
GrRenderTarget* renderTarget,
int left, int top,
int width, int height,
GrPixelConfig config,
size_t rowBytes) const SK_OVERRIDE;
virtual bool fullReadPixelsIsFasterThanPartial() const SK_OVERRIDE;
virtual void abandonResources() SK_OVERRIDE;
private:
// GrGpu overrides
virtual void onResetContext() SK_OVERRIDE;
virtual GrTexture* onCreateTexture(const GrTextureDesc& desc,
const void* srcData,
size_t rowBytes) SK_OVERRIDE;
virtual GrVertexBuffer* onCreateVertexBuffer(uint32_t size,
bool dynamic) SK_OVERRIDE;
virtual GrIndexBuffer* onCreateIndexBuffer(uint32_t size,
bool dynamic) SK_OVERRIDE;
virtual GrPath* onCreatePath(const SkPath&) SK_OVERRIDE;
virtual GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) SK_OVERRIDE;
virtual GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) SK_OVERRIDE;
virtual bool createStencilBufferForRenderTarget(GrRenderTarget* rt,
int width,
int height) SK_OVERRIDE;
virtual bool attachStencilBufferToRenderTarget(
GrStencilBuffer* sb,
GrRenderTarget* rt) SK_OVERRIDE;
virtual void onClear(const GrIRect* rect, GrColor color) SK_OVERRIDE;
virtual void onForceRenderTargetFlush() SK_OVERRIDE;
virtual bool onReadPixels(GrRenderTarget* target,
int left, int top,
int width, int height,
GrPixelConfig,
void* buffer,
size_t rowBytes,
bool invertY) SK_OVERRIDE;
virtual void onWriteTexturePixels(GrTexture* texture,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes) SK_OVERRIDE;
virtual void onResolveRenderTarget(GrRenderTarget* target) SK_OVERRIDE;
virtual void onGpuDraw(const DrawInfo&) SK_OVERRIDE;
virtual void setStencilPathSettings(const GrPath&,
SkPath::FillType,
GrStencilSettings* settings)
SK_OVERRIDE;
virtual void onGpuStencilPath(const GrPath*, SkPath::FillType) SK_OVERRIDE;
virtual void clearStencil() SK_OVERRIDE;
virtual void clearStencilClip(const GrIRect& rect,
bool insideClip) SK_OVERRIDE;
virtual bool flushGraphicsState(DrawType) SK_OVERRIDE;
const GrGLCaps& glCaps() const { return fGLContextInfo.caps(); }
// binds texture unit in GL
void setTextureUnit(int unitIdx);
// Sets up vertex attribute pointers and strides. On return startIndexOffset specifies an
// offset into the index buffer to the first index to be read (in addition to
// info.startIndex()). It accounts for the fact that index buffer pool may have provided space
// in the middle of a larger index buffer.
void setupGeometry(const DrawInfo& info, int* startIndexOffset);
// binds appropriate vertex and index buffers, also returns any extra verts or indices to
// offset by based on how space was allocated in pool VB/IBs.
void setBuffers(bool indexed, int* extraVertexOffset, int* extraIndexOffset);
// Subclasses should call this to flush the blend state.
// The params should be the final coefficients to apply
// (after any blending optimizations or dual source blending considerations
// have been accounted for).
void flushBlend(bool isLines, GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff);
bool hasExtension(const char* ext) const {
return fGLContextInfo.hasExtension(ext);
}
const GrGLContextInfo& glContextInfo() const { return fGLContextInfo; }
static bool BlendCoeffReferencesConstant(GrBlendCoeff coeff);
// for readability of function impls
typedef GrGLProgram::Desc ProgramDesc;
class ProgramCache : public ::GrNoncopyable {
public:
ProgramCache(const GrGLContextInfo& gl);
void abandon();
GrGLProgram* getProgram(const GrGLProgram::Desc& desc, const GrEffectStage* stages[]);
private:
enum {
kKeySize = sizeof(ProgramDesc),
// We may actually have kMaxEntries+1 shaders in the GL context because we create a new
// shader before evicting from the cache.
kMaxEntries = 32
};
class Entry;
// The value of the hash key is based on the ProgramDesc.
typedef GrTBinHashKey<Entry, kKeySize> ProgramHashKey;
class Entry : public ::GrNoncopyable {
public:
Entry() : fProgram(NULL), fLRUStamp(0) {}
Entry& operator = (const Entry& entry) {
GrSafeRef(entry.fProgram.get());
fProgram.reset(entry.fProgram.get());
fKey = entry.fKey;
fLRUStamp = entry.fLRUStamp;
return *this;
}
int compare(const ProgramHashKey& key) const {
return fKey.compare(key);
}
public:
SkAutoTUnref<GrGLProgram> fProgram;
ProgramHashKey fKey;
unsigned int fLRUStamp; // Move outside entry?
};
GrTHashTable<Entry, ProgramHashKey, 8> fHashCache;
Entry fEntries[kMaxEntries];
int fCount;
unsigned int fCurrLRUStamp;
const GrGLContextInfo& fGL;
};
// sets the color specified by GrDrawState::setColor()
void flushColor(GrColor color);
// sets the color specified by GrDrawState::setCoverage()
void flushCoverage(GrColor color);
// sets the MVP matrix uniform for currently bound program
void flushViewMatrix(DrawType type);
// flushes dithering, color-mask, and face culling stat
void flushMiscFixedFunctionState();
// flushes the scissor. see the note on flushBoundTextureAndParams about
// flushing the scissor after that function is called.
void flushScissor();
void buildProgram(bool isPoints,
BlendOptFlags blendOpts,
GrBlendCoeff dstCoeff,
ProgramDesc* desc);
// Inits GrDrawTarget::Caps, subclass may enable additional caps.
void initCaps();
void initFSAASupport();
// determines valid stencil formats
void initStencilFormats();
// notify callbacks to update state tracking when related
// objects are bound to GL or deleted outside of the class
void notifyVertexBufferBind(const GrGLVertexBuffer* buffer);
void notifyVertexBufferDelete(const GrGLVertexBuffer* buffer);
void notifyIndexBufferBind(const GrGLIndexBuffer* buffer);
void notifyIndexBufferDelete(const GrGLIndexBuffer* buffer);
void notifyTextureDelete(GrGLTexture* texture);
void notifyRenderTargetDelete(GrRenderTarget* renderTarget);
void setSpareTextureUnit();
// bound is region that may be modified and therefore has to be resolved.
// NULL means whole target. Can be an empty rect.
void flushRenderTarget(const GrIRect* bound);
void flushStencil(DrawType);
void flushAAState(DrawType);
bool configToGLFormats(GrPixelConfig config,
bool getSizedInternal,
GrGLenum* internalFormat,
GrGLenum* externalFormat,
GrGLenum* externalType);
// helper for onCreateTexture and writeTexturePixels
bool uploadTexData(const GrGLTexture::Desc& desc,
bool isNewTexture,
int left, int top, int width, int height,
GrPixelConfig dataConfig,
const void* data,
size_t rowBytes);
bool createRenderTargetObjects(int width, int height,
GrGLuint texID,
GrGLRenderTarget::Desc* desc);
void fillInConfigRenderableTable();
friend class GrGLVertexBuffer;
friend class GrGLIndexBuffer;
friend class GrGLTexture;
friend class GrGLRenderTarget;
GrGLContextInfo fGLContextInfo;
// GL program-related state
ProgramCache* fProgramCache;
SkAutoTUnref<GrGLProgram> fCurrentProgram;
///////////////////////////////////////////////////////////////////////////
///@name Caching of GL State
///@{
int fHWActiveTextureUnitIdx;
GrGLuint fHWProgramID;
GrColor fHWConstAttribColor;
GrColor fHWConstAttribCoverage;
enum TriState {
kNo_TriState,
kYes_TriState,
kUnknown_TriState
};
// last scissor / viewport scissor state seen by the GL.
struct {
TriState fEnabled;
GrGLIRect fRect;
void invalidate() {
fEnabled = kUnknown_TriState;
fRect.invalidate();
}
} fHWScissorSettings;
GrGLIRect fHWViewport;
struct {
size_t fVertexOffset;
GrVertexLayout fVertexLayout;
const GrVertexBuffer* fVertexBuffer;
const GrIndexBuffer* fIndexBuffer;
bool fArrayPtrsDirty;
} fHWGeometryState;
struct {
GrBlendCoeff fSrcCoeff;
GrBlendCoeff fDstCoeff;
GrColor fConstColor;
bool fConstColorValid;
TriState fEnabled;
void invalidate() {
fSrcCoeff = kInvalid_GrBlendCoeff;
fDstCoeff = kInvalid_GrBlendCoeff;
fConstColorValid = false;
fEnabled = kUnknown_TriState;
}
} fHWBlendState;
struct {
TriState fMSAAEnabled;
TriState fSmoothLineEnabled;
void invalidate() {
fMSAAEnabled = kUnknown_TriState;
fSmoothLineEnabled = kUnknown_TriState;
}
} fHWAAState;
struct {
SkMatrix fViewMatrix;
SkISize fRTSize;
void invalidate() {
fViewMatrix = SkMatrix::InvalidMatrix();
fRTSize.fWidth = -1; // just make the first value compared illegal.
}
} fHWPathMatrixState;
GrStencilSettings fHWStencilSettings;
TriState fHWStencilTestEnabled;
GrDrawState::DrawFace fHWDrawFace;
TriState fHWWriteToColor;
TriState fHWDitherEnabled;
GrRenderTarget* fHWBoundRenderTarget;
GrTexture* fHWBoundTextures[GrDrawState::kNumStages];
///@}
// we record what stencil format worked last time to hopefully exit early
// from our loop that tries stencil formats and calls check fb status.
int fLastSuccessfulStencilFmtIdx;
bool fPrintedCaps;
typedef GrGpu INHERITED;
};
#endif