mirror of https://github.com/axmolengine/axmol.git
239 lines
8.8 KiB
C
239 lines
8.8 KiB
C
|
/*
|
||
|
|
Copyright 2010 Google Inc.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef SkGpuDevice_DEFINED
|
||
|
|
#define SkGpuDevice_DEFINED
|
||
|
|
|
||
|
|
#include "SkGr.h"
|
||
|
|
#include "SkBitmap.h"
|
||
|
|
#include "SkDevice.h"
|
||
|
|
#include "SkRegion.h"
|
||
|
|
|
||
|
|
struct SkDrawProcs;
|
||
|
|
struct GrSkDrawProcs;
|
||
|
|
class GrTextContext;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Subclass of SkDevice, which directs all drawing to the GrGpu owned by the
|
||
|
|
* canvas.
|
||
|
|
*/
|
||
|
|
class SK_API SkGpuDevice : public SkDevice {
|
||
|
|
public:
|
||
|
|
/**
|
||
|
|
* New device that will create an offscreen renderTarget based on the
|
||
|
|
* config, width, height.
|
||
|
|
*
|
||
|
|
* usage is a special flag that should only be set by SkCanvas
|
||
|
|
* internally.
|
||
|
|
*/
|
||
|
|
SkGpuDevice(GrContext*, SkBitmap::Config,
|
||
|
|
int width, int height,
|
||
|
|
SkDevice::Usage usage = SkDevice::kGeneral_Usage);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* New device that will render to the specified renderTarget.
|
||
|
|
*/
|
||
|
|
SkGpuDevice(GrContext*, GrRenderTarget*);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* New device that will render to the texture (as a rendertarget).
|
||
|
|
* The GrTexture's asRenderTarget() must be non-NULL or device will not
|
||
|
|
* function.
|
||
|
|
*/
|
||
|
|
SkGpuDevice(GrContext*, GrTexture*);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Magic value that can be passed to constructor. Causes
|
||
|
|
* the device to infer rendertarget from underlying 3D API (e.g. GL or D3D).
|
||
|
|
* This isn't a valid pointer, don't attempt to dereference.
|
||
|
|
*/
|
||
|
|
static GrRenderTarget* Current3DApiRenderTarget();
|
||
|
|
|
||
|
|
virtual ~SkGpuDevice();
|
||
|
|
|
||
|
|
GrContext* context() const { return fContext; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If this device was built for rendering as a layer (i.e. offscreen),
|
||
|
|
* then this will return the platform-specific handle to that GPU resource.
|
||
|
|
* For example, in OpenGL, this will return the FBO's texture ID.
|
||
|
|
* If this device was not built for rendering as a layer, then 0
|
||
|
|
* is returned.
|
||
|
|
*/
|
||
|
|
intptr_t getLayerTextureHandle() const;
|
||
|
|
|
||
|
|
// call to set the clip to the specified rect
|
||
|
|
void scissor(const SkIRect&);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Override from SkGpuDevice, so we can set our FBO to be the render target
|
||
|
|
* The canvas parameter must be a SkGpuCanvas
|
||
|
|
*/
|
||
|
|
virtual void gainFocus(SkCanvas*, const SkMatrix&, const SkRegion&,
|
||
|
|
const SkClipStack& clipStack);
|
||
|
|
|
||
|
|
virtual SkGpuTexture* accessTexture() { return (SkGpuTexture*)fTexture; }
|
||
|
|
|
||
|
|
// overrides from SkDevice
|
||
|
|
|
||
|
|
virtual void clear(SkColor color);
|
||
|
|
virtual bool readPixels(const SkIRect& srcRect, SkBitmap* bitmap);
|
||
|
|
virtual void writePixels(const SkBitmap& bitmap, int x, int y);
|
||
|
|
|
||
|
|
virtual void setMatrixClip(const SkMatrix& matrix, const SkRegion& clip,
|
||
|
|
const SkClipStack&);
|
||
|
|
|
||
|
|
virtual void drawPaint(const SkDraw&, const SkPaint& paint);
|
||
|
|
virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
|
||
|
|
const SkPoint[], const SkPaint& paint);
|
||
|
|
virtual void drawRect(const SkDraw&, const SkRect& r,
|
||
|
|
const SkPaint& paint);
|
||
|
|
virtual void drawPath(const SkDraw&, const SkPath& path,
|
||
|
|
const SkPaint& paint, const SkMatrix* prePathMatrix,
|
||
|
|
bool pathIsMutable);
|
||
|
|
virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
|
||
|
|
const SkIRect* srcRectOrNull,
|
||
|
|
const SkMatrix& matrix, const SkPaint& paint);
|
||
|
|
virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
|
||
|
|
int x, int y, const SkPaint& paint);
|
||
|
|
virtual void drawText(const SkDraw&, const void* text, size_t len,
|
||
|
|
SkScalar x, SkScalar y, const SkPaint& paint);
|
||
|
|
virtual void drawPosText(const SkDraw&, const void* text, size_t len,
|
||
|
|
const SkScalar pos[], SkScalar constY,
|
||
|
|
int scalarsPerPos, const SkPaint& paint);
|
||
|
|
virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
|
||
|
|
const SkPath& path, const SkMatrix* matrix,
|
||
|
|
const SkPaint& paint);
|
||
|
|
virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
|
||
|
|
const SkPoint verts[], const SkPoint texs[],
|
||
|
|
const SkColor colors[], SkXfermode* xmode,
|
||
|
|
const uint16_t indices[], int indexCount,
|
||
|
|
const SkPaint& paint);
|
||
|
|
virtual void drawDevice(const SkDraw&, SkDevice*, int x, int y,
|
||
|
|
const SkPaint&);
|
||
|
|
virtual bool filterTextFlags(const SkPaint& paint, TextFlags*);
|
||
|
|
|
||
|
|
virtual void flush() { fContext->flush(false); }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Make's this device's rendertarget current in the underlying 3D API.
|
||
|
|
* Also implicitly flushes.
|
||
|
|
*/
|
||
|
|
virtual void makeRenderTargetCurrent();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
|
||
|
|
class TexCache;
|
||
|
|
enum TexType {
|
||
|
|
kBitmap_TexType,
|
||
|
|
kDeviceRenderTarget_TexType,
|
||
|
|
kSaveLayerDeviceRenderTarget_TexType
|
||
|
|
};
|
||
|
|
TexCache* lockCachedTexture(const SkBitmap& bitmap,
|
||
|
|
const GrSamplerState& sampler,
|
||
|
|
GrTexture** texture,
|
||
|
|
TexType type = kBitmap_TexType);
|
||
|
|
void unlockCachedTexture(TexCache*);
|
||
|
|
|
||
|
|
class SkAutoCachedTexture {
|
||
|
|
public:
|
||
|
|
SkAutoCachedTexture();
|
||
|
|
SkAutoCachedTexture(SkGpuDevice* device,
|
||
|
|
const SkBitmap& bitmap,
|
||
|
|
const GrSamplerState& sampler,
|
||
|
|
GrTexture** texture);
|
||
|
|
~SkAutoCachedTexture();
|
||
|
|
|
||
|
|
GrTexture* set(SkGpuDevice*, const SkBitmap&, const GrSamplerState&);
|
||
|
|
|
||
|
|
private:
|
||
|
|
SkGpuDevice* fDevice;
|
||
|
|
TexCache* fTex;
|
||
|
|
};
|
||
|
|
friend class SkAutoTexCache;
|
||
|
|
|
||
|
|
class SkAutoCanvasCreator {
|
||
|
|
public:
|
||
|
|
SkAutoCanvasCreator(const SkBitmap& bitmap, const SkMatrix& matrix, const SkRegion& clip)
|
||
|
|
: fCanvas(bitmap) {
|
||
|
|
fCanvas.setMatrix(matrix);
|
||
|
|
fCanvas.setClipRegion(clip);
|
||
|
|
}
|
||
|
|
SkCanvas* canvas() { return &fCanvas; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
SkCanvas fCanvas;
|
||
|
|
};
|
||
|
|
|
||
|
|
private:
|
||
|
|
GrContext* fContext;
|
||
|
|
|
||
|
|
GrSkDrawProcs* fDrawProcs;
|
||
|
|
|
||
|
|
// state for our offscreen render-target
|
||
|
|
TexCache* fCache;
|
||
|
|
GrTexture* fTexture;
|
||
|
|
GrRenderTarget* fRenderTarget;
|
||
|
|
bool fNeedClear;
|
||
|
|
bool fNeedPrepareRenderTarget;
|
||
|
|
|
||
|
|
// called from rt and tex cons
|
||
|
|
void initFromRenderTarget(GrContext*, GrRenderTarget*);
|
||
|
|
|
||
|
|
// doesn't set the texture/sampler/matrix state
|
||
|
|
// caller needs to null out GrPaint's texture if
|
||
|
|
// non-textured drawing is desired.
|
||
|
|
// Set constantColor to true if a constant color
|
||
|
|
// will be used. This is an optimization, and can
|
||
|
|
// always be set to false. constantColor should
|
||
|
|
// never be true if justAlpha is true.
|
||
|
|
bool skPaint2GrPaintNoShader(const SkPaint& skPaint,
|
||
|
|
bool justAlpha,
|
||
|
|
GrPaint* grPaint,
|
||
|
|
bool constantColor);
|
||
|
|
|
||
|
|
// uses the SkShader to setup paint, act used to
|
||
|
|
// hold lock on cached texture and free it when
|
||
|
|
// destroyed.
|
||
|
|
// If there is no shader, constantColor will
|
||
|
|
// be passed to skPaint2GrPaintNoShader. Otherwise
|
||
|
|
// it is ignored.
|
||
|
|
bool skPaint2GrPaintShader(const SkPaint& skPaint,
|
||
|
|
SkAutoCachedTexture* act,
|
||
|
|
const SkMatrix& ctm,
|
||
|
|
GrPaint* grPaint,
|
||
|
|
bool constantColor);
|
||
|
|
|
||
|
|
// override from SkDevice
|
||
|
|
virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config,
|
||
|
|
int width, int height,
|
||
|
|
bool isOpaque,
|
||
|
|
Usage usage);
|
||
|
|
|
||
|
|
SkDrawProcs* initDrawForText(GrTextContext*);
|
||
|
|
bool bindDeviceAsTexture(GrPaint* paint);
|
||
|
|
|
||
|
|
void prepareRenderTarget(const SkDraw&);
|
||
|
|
void internalDrawBitmap(const SkDraw&, const SkBitmap&,
|
||
|
|
const SkIRect&, const SkMatrix&, GrPaint* grPaint);
|
||
|
|
|
||
|
|
typedef SkDevice INHERITED;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|