зеркало из https://github.com/mozilla/moz-skia.git
280 строки
11 KiB
C++
280 строки
11 KiB
C++
|
|
/*
|
|
* 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 SkPDFDevice_DEFINED
|
|
#define SkPDFDevice_DEFINED
|
|
|
|
#include "SkCanvas.h"
|
|
#include "SkDevice.h"
|
|
#include "SkPaint.h"
|
|
#include "SkPath.h"
|
|
#include "SkRect.h"
|
|
#include "SkRefCnt.h"
|
|
#include "SkStream.h"
|
|
#include "SkTScopedPtr.h"
|
|
|
|
class SkPDFArray;
|
|
class SkPDFDevice;
|
|
class SkPDFDict;
|
|
class SkPDFFont;
|
|
class SkPDFFormXObject;
|
|
class SkPDFGlyphSetMap;
|
|
class SkPDFGraphicState;
|
|
class SkPDFObject;
|
|
class SkPDFShader;
|
|
class SkPDFStream;
|
|
|
|
// Private classes.
|
|
struct ContentEntry;
|
|
struct GraphicStateEntry;
|
|
|
|
/** \class SkPDFDevice
|
|
|
|
The drawing context for the PDF backend.
|
|
*/
|
|
class SkPDFDevice : public SkDevice {
|
|
public:
|
|
/** Create a PDF drawing context with the given width and height.
|
|
* 72 points/in means letter paper is 612x792.
|
|
* @param pageSize Page size in points.
|
|
* @param contentSize The content size of the page in points. This will be
|
|
* combined with the initial transform to determine the drawing area
|
|
* (as reported by the width and height methods). Anything outside
|
|
* of the drawing area will be clipped.
|
|
* @param initialTransform The initial transform to apply to the page.
|
|
* This may be useful to, for example, move the origin in and
|
|
* over a bit to account for a margin, scale the canvas,
|
|
* or apply a rotation. Note1: the SkPDFDevice also applies
|
|
* a scale+translate transform to move the origin from the
|
|
* bottom left (PDF default) to the top left. Note2: drawDevice
|
|
* (used by layer restore) draws the device after this initial
|
|
* transform is applied, so the PDF device does an
|
|
* inverse scale+translate to accommodate the one that SkPDFDevice
|
|
* always does.
|
|
*/
|
|
// TODO(vandebo): The sizes should be SkSize and not SkISize.
|
|
SK_API SkPDFDevice(const SkISize& pageSize, const SkISize& contentSize,
|
|
const SkMatrix& initialTransform);
|
|
SK_API virtual ~SkPDFDevice();
|
|
|
|
virtual uint32_t getDeviceCapabilities() SK_OVERRIDE;
|
|
|
|
virtual void clear(SkColor color) SK_OVERRIDE;
|
|
|
|
/** These are called inside the per-device-layer loop for each draw call.
|
|
When these are called, we have already applied any saveLayer operations,
|
|
and are handling any looping from the paint, and any effects from the
|
|
DrawFilter.
|
|
*/
|
|
virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
|
|
virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode,
|
|
size_t count, const SkPoint[],
|
|
const SkPaint& paint) SK_OVERRIDE;
|
|
virtual void drawRect(const SkDraw&, const SkRect& r, const SkPaint& paint);
|
|
virtual void drawPath(const SkDraw&, const SkPath& origpath,
|
|
const SkPaint& paint, const SkMatrix* prePathMatrix,
|
|
bool pathIsMutable) SK_OVERRIDE;
|
|
virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
|
|
const SkIRect* srcRectOrNull,
|
|
const SkMatrix& matrix, const SkPaint&) SK_OVERRIDE;
|
|
virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap, int x, int y,
|
|
const SkPaint& paint) SK_OVERRIDE;
|
|
virtual void drawText(const SkDraw&, const void* text, size_t len,
|
|
SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
|
|
virtual void drawPosText(const SkDraw&, const void* text, size_t len,
|
|
const SkScalar pos[], SkScalar constY,
|
|
int scalarsPerPos, const SkPaint&) SK_OVERRIDE;
|
|
virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
|
|
const SkPath& path, const SkMatrix* matrix,
|
|
const SkPaint& paint) SK_OVERRIDE;
|
|
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) SK_OVERRIDE;
|
|
virtual void drawDevice(const SkDraw&, SkDevice*, int x, int y,
|
|
const SkPaint&) SK_OVERRIDE;
|
|
|
|
virtual void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
|
|
virtual void onDetachFromCanvas() SK_OVERRIDE;
|
|
|
|
enum DrawingArea {
|
|
kContent_DrawingArea, // Drawing area for the page content.
|
|
kMargin_DrawingArea, // Drawing area for the margin content.
|
|
};
|
|
|
|
/** Sets the drawing area for the device. Subsequent draw calls are directed
|
|
* to the specific drawing area (margin or content). The default drawing
|
|
* area is the content drawing area.
|
|
*
|
|
* Currently if margin content is drawn and then a complex (for PDF) xfer
|
|
* mode is used, like SrcIn, Clear, etc, the margin content will get
|
|
* clipped. A simple way to avoid the bug is to always draw the margin
|
|
* content last.
|
|
*/
|
|
SK_API void setDrawingArea(DrawingArea drawingArea);
|
|
|
|
// PDF specific methods.
|
|
|
|
/** Returns the resource dictionary for this device.
|
|
*/
|
|
SK_API SkPDFDict* getResourceDict();
|
|
|
|
/** Get the list of resources (PDF objects) used on this page.
|
|
* @param resourceList A list to append the resources to.
|
|
* @param recursive If recursive is true, get the resources of the
|
|
* device's resources recursively. (Useful for adding
|
|
* objects to the catalog.)
|
|
*/
|
|
SK_API void getResources(SkTDArray<SkPDFObject*>* resourceList,
|
|
bool recursive) const;
|
|
|
|
/** Get the fonts used on this device.
|
|
*/
|
|
SK_API const SkTDArray<SkPDFFont*>& getFontResources() const;
|
|
|
|
/** Returns a copy of the media box for this device. The caller is required
|
|
* to unref() this when it is finished.
|
|
*/
|
|
SK_API SkPDFArray* copyMediaBox() const;
|
|
|
|
/** Get the annotations from this page, or NULL if there are none.
|
|
*/
|
|
SK_API SkPDFArray* getAnnotations() const { return fAnnotations; }
|
|
|
|
/** Returns a SkStream with the page contents. The caller is responsible
|
|
for a reference to the returned value.
|
|
DEPRECATED: use copyContentToData()
|
|
*/
|
|
SK_API SkStream* content() const;
|
|
|
|
/** Returns a SkStream with the page contents. The caller is responsible
|
|
* for calling data->unref() when it is finished.
|
|
*/
|
|
SK_API SkData* copyContentToData() const;
|
|
|
|
SK_API const SkMatrix& initialTransform() const {
|
|
return fInitialTransform;
|
|
}
|
|
|
|
/** Returns a SkPDFGlyphSetMap which represents glyph usage of every font
|
|
* that shows on this device.
|
|
*/
|
|
const SkPDFGlyphSetMap& getFontGlyphUsage() const {
|
|
return *(fFontGlyphUsage.get());
|
|
}
|
|
|
|
protected:
|
|
virtual bool onReadPixels(const SkBitmap& bitmap, int x, int y,
|
|
SkCanvas::Config8888) SK_OVERRIDE;
|
|
|
|
virtual bool allowImageFilter(SkImageFilter*) SK_OVERRIDE;
|
|
|
|
private:
|
|
// TODO(vandebo): push most of SkPDFDevice's state into a core object in
|
|
// order to get the right access levels without using friend.
|
|
friend class ScopedContentEntry;
|
|
|
|
SkISize fPageSize;
|
|
SkISize fContentSize;
|
|
SkMatrix fInitialTransform;
|
|
SkClipStack fExistingClipStack;
|
|
SkRegion fExistingClipRegion;
|
|
SkPDFArray* fAnnotations;
|
|
SkPDFDict* fResourceDict;
|
|
|
|
SkTDArray<SkPDFGraphicState*> fGraphicStateResources;
|
|
SkTDArray<SkPDFObject*> fXObjectResources;
|
|
SkTDArray<SkPDFFont*> fFontResources;
|
|
SkTDArray<SkPDFObject*> fShaderResources;
|
|
|
|
SkTScopedPtr<ContentEntry> fContentEntries;
|
|
ContentEntry* fLastContentEntry;
|
|
SkTScopedPtr<ContentEntry> fMarginContentEntries;
|
|
ContentEntry* fLastMarginContentEntry;
|
|
DrawingArea fDrawingArea;
|
|
|
|
const SkClipStack* fClipStack;
|
|
|
|
// Accessor and setter functions based on the current DrawingArea.
|
|
SkTScopedPtr<ContentEntry>* getContentEntries();
|
|
ContentEntry* getLastContentEntry();
|
|
void setLastContentEntry(ContentEntry* contentEntry);
|
|
|
|
// Glyph ids used for each font on this device.
|
|
SkTScopedPtr<SkPDFGlyphSetMap> fFontGlyphUsage;
|
|
|
|
SkPDFDevice(const SkISize& layerSize, const SkClipStack& existingClipStack,
|
|
const SkRegion& existingClipRegion);
|
|
|
|
// override from SkDevice
|
|
virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config,
|
|
int width, int height,
|
|
bool isOpaque,
|
|
Usage usage) SK_OVERRIDE;
|
|
|
|
void init();
|
|
void cleanUp(bool clearFontUsage);
|
|
SkPDFFormXObject* createFormXObjectFromDevice();
|
|
|
|
// Clear the passed clip from all existing content entries.
|
|
void clearClipFromContent(const SkClipStack* clipStack,
|
|
const SkRegion& clipRegion);
|
|
void drawFormXObjectWithClip(SkPDFFormXObject* form,
|
|
const SkClipStack* clipStack,
|
|
const SkRegion& clipRegion,
|
|
bool invertClip);
|
|
|
|
// If the paint or clip is such that we shouldn't draw anything, this
|
|
// returns NULL and does not create a content entry.
|
|
// setUpContentEntry and finishContentEntry can be used directly, but
|
|
// the preferred method is to use the ScopedContentEntry helper class.
|
|
ContentEntry* setUpContentEntry(const SkClipStack* clipStack,
|
|
const SkRegion& clipRegion,
|
|
const SkMatrix& matrix,
|
|
const SkPaint& paint,
|
|
bool hasText,
|
|
SkPDFFormXObject** dst);
|
|
void finishContentEntry(SkXfermode::Mode xfermode,
|
|
SkPDFFormXObject* dst);
|
|
bool isContentEmpty();
|
|
|
|
void populateGraphicStateEntryFromPaint(const SkMatrix& matrix,
|
|
const SkClipStack& clipStack,
|
|
const SkRegion& clipRegion,
|
|
const SkPaint& paint,
|
|
bool hasText,
|
|
GraphicStateEntry* entry);
|
|
int addGraphicStateResource(SkPDFGraphicState* gs);
|
|
|
|
void updateFont(const SkPaint& paint, uint16_t glyphID,
|
|
ContentEntry* contentEntry);
|
|
int getFontResourceIndex(SkTypeface* typeface, uint16_t glyphID);
|
|
|
|
void internalDrawPaint(const SkPaint& paint, ContentEntry* contentEntry);
|
|
void internalDrawBitmap(const SkMatrix& matrix,
|
|
const SkClipStack* clipStack,
|
|
const SkRegion& clipRegion,
|
|
const SkBitmap& bitmap,
|
|
const SkIRect* srcRect,
|
|
const SkPaint& paint);
|
|
|
|
/** Helper method for copyContentToData. It is responsible for copying the
|
|
* list of content entries |entry| to |data|.
|
|
*/
|
|
void copyContentEntriesToData(ContentEntry* entry, SkWStream* data) const;
|
|
|
|
bool handleAnnotations(const SkRect& r, const SkMatrix& matrix,
|
|
const SkPaint& paint);
|
|
|
|
typedef SkDevice INHERITED;
|
|
};
|
|
|
|
#endif
|