mirror of https://github.com/axmolengine/axmol.git
241 lines
7.8 KiB
C++
241 lines
7.8 KiB
C++
/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef SkGr_DEFINED
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#define SkGr_DEFINED
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#include <stddef.h>
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// Gr headers
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#include "GrConfig.h"
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#include "GrContext.h"
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#include "GrFontScaler.h"
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#include "GrClipIterator.h"
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#include "GrPath.h"
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// skia headers
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#include "SkBitmap.h"
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#include "SkPath.h"
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#include "SkPoint.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkClipStack.h"
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#if (GR_DEBUG && defined(SK_RELEASE)) || (GR_RELEASE && defined(SK_DEBUG))
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// #error "inconsistent GR_DEBUG and SK_DEBUG"
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#endif
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#if GR_SCALAR_IS_FIXED
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#ifdef SK_SCALAR_IS_FIXED
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#define SK_SCALAR_IS_GR_SCALAR 1
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#else
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#define SK_SCALAR_IS_GR_SCALAR 0
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#endif
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#define SkScalarToGrScalar(x) SkScalarToFixed(x)
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#elif GR_SCALAR_IS_FLOAT
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#ifdef SK_SCALAR_IS_FLOAT
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#define SK_SCALAR_IS_GR_SCALAR 1
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#else
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#define SK_SCALAR_IS_GR_SCALAR 0
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#endif
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#define SkScalarToGrScalar(x) SkScalarToFloat(x)
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#else
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#error "Ganesh scalar type not defined"
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#endif
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////////////////////////////////////////////////////////////////////////////////
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// Sk to Gr Type conversions
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// Verify that SkPoint and GrPoint are compatible if using the same scalar type
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#if 0/*SK_SCALAR_IS_GR_SCALAR*/
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GR_STATIC_ASSERT(sizeof(SkPoint) == sizeof(GrPoint));
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GR_STATIC_ASSERT(offsetof(SkPoint,fX) == offsetof(GrPoint,fX)));
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GR_STATIC_ASSERT(offsetof(SkPoint,fY) == offsetof(GrPoint,fY)));
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#endif
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GR_STATIC_ASSERT((int)GrSamplerState::kClamp_WrapMode == (int)SkShader::kClamp_TileMode);
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GR_STATIC_ASSERT((int)GrSamplerState::kRepeat_WrapMode ==(
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int)SkShader::kRepeat_TileMode);
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GR_STATIC_ASSERT((int)GrSamplerState::kMirror_WrapMode ==
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(int)SkShader::kMirror_TileMode);
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#define sk_tile_mode_to_grwrap(X) ((GrSamplerState::WrapMode)(X))
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GR_STATIC_ASSERT((int)kZero_BlendCoeff == (int)SkXfermode::kZero_Coeff);
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GR_STATIC_ASSERT((int)kOne_BlendCoeff == (int)SkXfermode::kOne_Coeff);
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GR_STATIC_ASSERT((int)kSC_BlendCoeff == (int)SkXfermode::kSC_Coeff);
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GR_STATIC_ASSERT((int)kISC_BlendCoeff == (int)SkXfermode::kISC_Coeff);
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GR_STATIC_ASSERT((int)kDC_BlendCoeff == (int)SkXfermode::kDC_Coeff);
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GR_STATIC_ASSERT((int)kIDC_BlendCoeff == (int)SkXfermode::kIDC_Coeff);
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GR_STATIC_ASSERT((int)kSA_BlendCoeff == (int)SkXfermode::kSA_Coeff);
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GR_STATIC_ASSERT((int)kISA_BlendCoeff == (int)SkXfermode::kISA_Coeff);
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GR_STATIC_ASSERT((int)kDA_BlendCoeff == (int)SkXfermode::kDA_Coeff);
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GR_STATIC_ASSERT((int)kIDA_BlendCoeff == (int)SkXfermode::kIDA_Coeff);
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#define sk_blend_to_grblend(X) ((GrBlendCoeff)(X))
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GR_STATIC_ASSERT((int)SkPath::kMove_Verb == (int)kMove_PathCmd);
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GR_STATIC_ASSERT((int)SkPath::kLine_Verb == (int)kLine_PathCmd);
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GR_STATIC_ASSERT((int)SkPath::kQuad_Verb == (int)kQuadratic_PathCmd);
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GR_STATIC_ASSERT((int)SkPath::kCubic_Verb == (int)kCubic_PathCmd);
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GR_STATIC_ASSERT((int)SkPath::kClose_Verb == (int)kClose_PathCmd);
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GR_STATIC_ASSERT((int)SkPath::kDone_Verb == (int)kEnd_PathCmd);
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#define sk_path_verb_to_gr_path_command(X) ((GrPathCmd)(X))
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///////////////////////////////////////////////////////////////////////////////
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#include "SkColorPriv.h"
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class SkGr {
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public:
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/**
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* Convert the SkBitmap::Config to the corresponding PixelConfig, or
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* kUnknown_PixelConfig if the conversion cannot be done.
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*/
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static GrPixelConfig BitmapConfig2PixelConfig(SkBitmap::Config,
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bool isOpaque);
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static GrPixelConfig Bitmap2PixelConfig(const SkBitmap& bm) {
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return BitmapConfig2PixelConfig(bm.config(), bm.isOpaque());
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}
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static GrColor SkColor2GrColor(SkColor c) {
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SkPMColor pm = SkPreMultiplyColor(c);
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unsigned r = SkGetPackedR32(pm);
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unsigned g = SkGetPackedG32(pm);
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unsigned b = SkGetPackedB32(pm);
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unsigned a = SkGetPackedA32(pm);
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return GrColorPackRGBA(r, g, b, a);
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}
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};
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////////////////////////////////////////////////////////////////////////////////
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// Classes
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class SkGrClipIterator : public GrClipIterator {
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public:
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SkGrClipIterator() { fClipStack = NULL; fCurr = NULL; }
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SkGrClipIterator(const SkClipStack& clipStack) { this->reset(clipStack); }
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void reset(const SkClipStack& clipStack);
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// overrides
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virtual bool isDone() const { return NULL == fCurr; }
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virtual void next() { fCurr = fIter.next(); }
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virtual void rewind() { this->reset(*fClipStack); }
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virtual GrClipType getType() const;
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virtual GrSetOp getOp() const;
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virtual void getRect(GrRect* rect) const {
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if (!fCurr->fRect) {
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rect->setEmpty();
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} else {
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*rect = *fCurr->fRect;
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}
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}
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virtual const GrPath* getPath() {
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return fCurr->fPath;
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}
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virtual GrPathFill getPathFill() const;
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private:
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const SkClipStack* fClipStack;
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SkClipStack::B2FIter fIter;
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// SkClipStack's auto advances on each get
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// so we store the current pos here.
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const SkClipStack::B2FIter::Clip* fCurr;
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};
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class SkGrRegionIterator : public GrClipIterator {
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public:
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SkGrRegionIterator() {}
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SkGrRegionIterator(const SkRegion& region) { this->reset(region); }
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void reset(const SkRegion& region) {
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fRegion = ®ion;
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fIter.reset(region);
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}
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// overrides
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virtual bool isDone() const { return fIter.done(); }
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virtual void next() { fIter.next(); }
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virtual void rewind() { this->reset(*fRegion); }
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virtual GrClipType getType() const { return kRect_ClipType; }
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virtual GrSetOp getOp() const { return kUnion_SetOp; }
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virtual void getRect(GrRect* rect) const {
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const SkIRect& r = fIter.rect();
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rect->fLeft = GrIntToScalar(r.fLeft);
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rect->fTop = GrIntToScalar(r.fTop);
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rect->fRight = GrIntToScalar(r.fRight);
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rect->fBottom = GrIntToScalar(r.fBottom);
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}
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virtual const GrPath* getPath() {
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SkASSERT(0);
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return NULL;
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}
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virtual GrPathFill getPathFill() const {
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SkASSERT(0);
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return kWinding_PathFill;
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}
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private:
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const SkRegion* fRegion;
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SkRegion::Iterator fIter;
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};
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class SkGlyphCache;
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class SkGrFontScaler : public GrFontScaler {
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public:
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explicit SkGrFontScaler(SkGlyphCache* strike);
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virtual ~SkGrFontScaler();
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// overrides
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virtual const GrKey* getKey();
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virtual GrMaskFormat getMaskFormat();
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virtual bool getPackedGlyphBounds(GrGlyph::PackedID, GrIRect* bounds);
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virtual bool getPackedGlyphImage(GrGlyph::PackedID, int width, int height,
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int rowBytes, void* image);
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virtual bool getGlyphPath(uint16_t glyphID, GrPath*);
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private:
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SkGlyphCache* fStrike;
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GrKey* fKey;
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// DECLARE_INSTANCE_COUNTER(SkGrFontScaler);
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};
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////////////////////////////////////////////////////////////////////////////////
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// Helper functions
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GrTextureEntry* sk_gr_create_bitmap_texture(GrContext* ctx,
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GrTextureKey* key,
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const GrSamplerState& sampler,
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const SkBitmap& bitmap);
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#endif
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