Split SkDevice into SkBaseDevice and SkBitmapDevice

src/core/SkDevice.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkDevice.h"
 #include "SkDeviceProperties.h"
 #include "SkDraw.h"
 #include "SkImageFilter.h"
 #include "SkMetaData.h"
 #include "SkRasterClip.h"
 #include "SkRect.h"
 #include "SkRRect.h"
 #include "SkShader.h"
 
-SK_DEFINE_INST_COUNT(SkDevice)
+SK_DEFINE_INST_COUNT(SkBaseDevice)
+SK_DEFINE_INST_COUNT(SkBitmapDevice)
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #define CHECK_FOR_NODRAW_ANNOTATION(paint) \
     do { if (paint.isNoDrawAnnotation()) { return; } } while (0)
 
 ///////////////////////////////////////////////////////////////////////////////
 
-SkDevice::SkDevice(const SkBitmap& bitmap)
-    : fBitmap(bitmap), fLeakyProperties(SkDeviceProperties::MakeDefault())
+SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap) 
+    : fBitmap(bitmap) {
+    SkASSERT(SkBitmap::kARGB_4444_Config != bitmap.config());
+}
+
+SkBaseDevice::SkBaseDevice()
+    : fLeakyProperties(SkDeviceProperties::MakeDefault()) 
 #ifdef SK_DEBUG
     , fAttachedToCanvas(false)
 #endif
-{
-    fOrigin.setZero();
-    fMetaData = NULL;
-
-    SkASSERT(SkBitmap::kARGB_4444_Config != bitmap.config());
-}
-
-SkDevice::SkDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties)
-    : fBitmap(bitmap), fLeakyProperties(deviceProperties)
-#ifdef SK_DEBUG
-    , fAttachedToCanvas(false)
-#endif
 {
     fOrigin.setZero();
     fMetaData = NULL;
 }
 
-SkDevice::SkDevice(SkBitmap::Config config, int width, int height, bool isOpaque)
-    : fLeakyProperties(SkDeviceProperties::MakeDefault())
+SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties)
+    : SkBaseDevice(deviceProperties)
+    , fBitmap(bitmap) {
+}
+
+SkBaseDevice::SkBaseDevice(const SkDeviceProperties& deviceProperties)
+    : fLeakyProperties(deviceProperties)
 #ifdef SK_DEBUG
     , fAttachedToCanvas(false)
 #endif
 {
     fOrigin.setZero();
     fMetaData = NULL;
+}
 
+SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque) {
     fBitmap.setConfig(config, width, height);
     fBitmap.allocPixels();
     fBitmap.setIsOpaque(isOpaque);
     if (!isOpaque) {
         fBitmap.eraseColor(SK_ColorTRANSPARENT);
     }
 }
 
-SkDevice::SkDevice(SkBitmap::Config config, int width, int height, bool isOpaque,
-                   const SkDeviceProperties& deviceProperties)
-    : fLeakyProperties(deviceProperties)
-#ifdef SK_DEBUG
-    , fAttachedToCanvas(false)
-#endif
-{
-    fOrigin.setZero();
-    fMetaData = NULL;
+SkBitmapDevice::SkBitmapDevice(SkBitmap::Config config, int width, int height, bool isOpaque,
+                         const SkDeviceProperties& deviceProperties)
+    : SkBaseDevice(deviceProperties) {
 
     fBitmap.setConfig(config, width, height);
     fBitmap.allocPixels();
     fBitmap.setIsOpaque(isOpaque);
     if (!isOpaque) {
         fBitmap.eraseColor(SK_ColorTRANSPARENT);
     }
 }
 
-SkDevice::~SkDevice() {
+SkBaseDevice::~SkBaseDevice() {
     delete fMetaData;
 }
 
-void SkDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) {
+SkBitmapDevice::~SkBitmapDevice() {
+}
+
+void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) {
     SkASSERT(bm.width() == fBitmap.width());
     SkASSERT(bm.height() == fBitmap.height());
     fBitmap = bm;   // intent is to use bm's pixelRef (and rowbytes/config)
     fBitmap.lockPixels();
 }
 
-SkDevice* SkDevice::createCompatibleDevice(SkBitmap::Config config,
-                                           int width, int height,
-                                           bool isOpaque) {
+SkBaseDevice* SkBaseDevice::createCompatibleDevice(SkBitmap::Config config,
+                                                   int width, int height,
+                                                   bool isOpaque) {
     return this->onCreateCompatibleDevice(config, width, height,
                                           isOpaque, kGeneral_Usage);
 }
 
-SkDevice* SkDevice::createCompatibleDeviceForSaveLayer(SkBitmap::Config config,
-                                                       int width, int height,
-                                                       bool isOpaque) {
+SkBaseDevice* SkBaseDevice::createCompatibleDeviceForSaveLayer(SkBitmap::Config config,
+                                                               int width, int height,
+                                                               bool isOpaque) {
     return this->onCreateCompatibleDevice(config, width, height,
                                           isOpaque, kSaveLayer_Usage);
 }
 
-SkDevice* SkDevice::onCreateCompatibleDevice(SkBitmap::Config config,
-                                             int width, int height,
-                                             bool isOpaque,
-                                             Usage usage) {
-    return SkNEW_ARGS(SkDevice,(config, width, height, isOpaque, fLeakyProperties));
+SkBaseDevice* SkBitmapDevice::onCreateCompatibleDevice(SkBitmap::Config config,
+                                                       int width, int height,
+                                                       bool isOpaque,
+                                                       Usage usage) {
+    return SkNEW_ARGS(SkBitmapDevice,(config, width, height, isOpaque, 
+                                      this->getDeviceProperties()));
 }
 
-SkMetaData& SkDevice::getMetaData() {
+SkMetaData& SkBaseDevice::getMetaData() {
     // metadata users are rare, so we lazily allocate it. If that changes we
     // can decide to just make it a field in the device (rather than a ptr)
     if (NULL == fMetaData) {
         fMetaData = new SkMetaData;
     }
     return *fMetaData;
 }
 
-void SkDevice::lockPixels() {
+void SkBitmapDevice::lockPixels() {
     if (fBitmap.lockPixelsAreWritable()) {
         fBitmap.lockPixels();
     }
 }
 
-void SkDevice::unlockPixels() {
+void SkBitmapDevice::unlockPixels() {
     if (fBitmap.lockPixelsAreWritable()) {
         fBitmap.unlockPixels();
     }
 }
 
-const SkBitmap& SkDevice::accessBitmap(bool changePixels) {
-    const SkBitmap& bitmap = this->onAccessBitmap(&fBitmap);
+const SkBitmap& SkBaseDevice::accessBitmap(bool changePixels) {
+    const SkBitmap& bitmap = this->onAccessBitmap();
     if (changePixels) {
         bitmap.notifyPixelsChanged();
     }
     return bitmap;
 }
 
-void SkDevice::getGlobalBounds(SkIRect* bounds) const {
+void SkBitmapDevice::getGlobalBounds(SkIRect* bounds) const {
     if (bounds) {
-        bounds->setXYWH(fOrigin.x(), fOrigin.y(),
+        const SkIPoint& origin = this->getOrigin();
+        bounds->setXYWH(origin.x(), origin.y(),
                         fBitmap.width(), fBitmap.height());
     }
 }
 
-void SkDevice::clear(SkColor color) {
+void SkBitmapDevice::clear(SkColor color) {
     fBitmap.eraseColor(color);
 }
 
-const SkBitmap& SkDevice::onAccessBitmap(SkBitmap* bitmap) {return *bitmap;}
-
-void SkDevice::setMatrixClip(const SkMatrix& matrix, const SkRegion& region,
-                             const SkClipStack& clipStack) {
+const SkBitmap& SkBitmapDevice::onAccessBitmap() {
+    return fBitmap;
 }
 
-bool SkDevice::canHandleImageFilter(SkImageFilter*) {
+bool SkBitmapDevice::canHandleImageFilter(SkImageFilter*) {
     return false;
 }
 
-bool SkDevice::filterImage(SkImageFilter* filter, const SkBitmap& src,
-                           const SkMatrix& ctm, SkBitmap* result,
-                           SkIPoint* offset) {
+bool SkBitmapDevice::filterImage(SkImageFilter* filter, const SkBitmap& src,
+                                 const SkMatrix& ctm, SkBitmap* result,
+                                 SkIPoint* offset) {
     return false;
 }
 
-bool SkDevice::allowImageFilter(SkImageFilter*) {
+bool SkBitmapDevice::allowImageFilter(SkImageFilter*) {
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-bool SkDevice::readPixels(SkBitmap* bitmap, int x, int y,
-                          SkCanvas::Config8888 config8888) {
+bool SkBaseDevice::readPixels(SkBitmap* bitmap, int x, int y,
+                              SkCanvas::Config8888 config8888) {
     if (SkBitmap::kARGB_8888_Config != bitmap->config() ||
         NULL != bitmap->getTexture()) {
         return false;
     }
 
     const SkBitmap& src = this->accessBitmap(false);
 
     SkIRect srcRect = SkIRect::MakeXYWH(x, y, bitmap->width(),
                                               bitmap->height());
     SkIRect devbounds = SkIRect::MakeWH(src.width(), src.height());
@@ skipping 23 matching lines @@
                                      srcRect.fLeft,
                                      srcRect.fTop,
                                      config8888);
     if (result && bmp == &tmp) {
         tmp.swap(*bitmap);
     }
     return result;
 }
 
 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
-    const SkCanvas::Config8888 SkDevice::kPMColorAlias =
+    const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias =
         SkCanvas::kBGRA_Premul_Config8888;
 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
-    const SkCanvas::Config8888 SkDevice::kPMColorAlias =
+    const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias =
         SkCanvas::kRGBA_Premul_Config8888;
 #else
-    const SkCanvas::Config8888 SkDevice::kPMColorAlias =
+    const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias =
         (SkCanvas::Config8888) -1;
 #endif
 
 #include <SkConfig8888.h>
 
-bool SkDevice::onReadPixels(const SkBitmap& bitmap,
-                            int x, int y,
-                            SkCanvas::Config8888 config8888) {
+bool SkBitmapDevice::onReadPixels(const SkBitmap& bitmap,
+                                  int x, int y,
+                                  SkCanvas::Config8888 config8888) {
     SkASSERT(SkBitmap::kARGB_8888_Config == bitmap.config());
     SkASSERT(!bitmap.isNull());
     SkASSERT(SkIRect::MakeWH(this->width(), this->height()).contains(SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height())));
 
     SkIRect srcRect = SkIRect::MakeXYWH(x, y, bitmap.width(),
                                               bitmap.height());
     const SkBitmap& src = this->accessBitmap(false);
 
     SkBitmap subset;
     if (!src.extractSubset(&subset, srcRect)) {
         return false;
     }
     if (SkBitmap::kARGB_8888_Config != subset.config()) {
         // It'd be preferable to do this directly to bitmap.
         subset.copyTo(&subset, SkBitmap::kARGB_8888_Config);
     }
     SkAutoLockPixels alp(bitmap);
     uint32_t* bmpPixels = reinterpret_cast<uint32_t*>(bitmap.getPixels());
     SkCopyBitmapToConfig8888(bmpPixels, bitmap.rowBytes(), config8888, subset);
     return true;
 }
 
-void SkDevice::writePixels(const SkBitmap& bitmap,
-                           int x, int y,
-                           SkCanvas::Config8888 config8888) {
+void SkBitmapDevice::writePixels(const SkBitmap& bitmap,
+                                 int x, int y,
+                                 SkCanvas::Config8888 config8888) {
     if (bitmap.isNull() || bitmap.getTexture()) {
         return;
     }
     const SkBitmap* sprite = &bitmap;
     // check whether we have to handle a config8888 that doesn't match SkPMColor
     if (SkBitmap::kARGB_8888_Config == bitmap.config() &&
         SkCanvas::kNative_Premul_Config8888 != config8888 &&
         kPMColorAlias != config8888) {
 
         // We're going to have to convert from a config8888 to the native config
@@ skipping 48 matching lines @@
     SkDraw  draw;
     draw.fRC = &clip;
     draw.fClip = &clip.bwRgn();
     draw.fBitmap = &fBitmap; // canvas should have already called accessBitmap
     draw.fMatrix = &SkMatrix::I();
     this->drawSprite(draw, *sprite, x, y, paint);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-void SkDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) {
+void SkBitmapDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) {
     draw.drawPaint(paint);
 }
 
-void SkDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
-                          const SkPoint pts[], const SkPaint& paint) {
+void SkBitmapDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
+                                const SkPoint pts[], const SkPaint& paint) {
     CHECK_FOR_NODRAW_ANNOTATION(paint);
     draw.drawPoints(mode, count, pts, paint);
 }
 
-void SkDevice::drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) {
+void SkBitmapDevice::drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) {
     CHECK_FOR_NODRAW_ANNOTATION(paint);
     draw.drawRect(r, paint);
 }
 
-void SkDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) {
+void SkBitmapDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) {
     CHECK_FOR_NODRAW_ANNOTATION(paint);
 
     SkPath path;
     path.addOval(oval);
     // call the VIRTUAL version, so any subclasses who do handle drawPath aren't
     // required to override drawOval.
     this->drawPath(draw, path, paint, NULL, true);
 }
 
-void SkDevice::drawRRect(const SkDraw& draw, const SkRRect& rrect, const SkPaint& paint) {
+void SkBitmapDevice::drawRRect(const SkDraw& draw, const SkRRect& rrect, const SkPaint& paint) {
     CHECK_FOR_NODRAW_ANNOTATION(paint);
 
     SkPath  path;
     path.addRRect(rrect);
     // call the VIRTUAL version, so any subclasses who do handle drawPath aren't
     // required to override drawRRect.
     this->drawPath(draw, path, paint, NULL, true);
 }
 
-void SkDevice::drawPath(const SkDraw& draw, const SkPath& path,
-                        const SkPaint& paint, const SkMatrix* prePathMatrix,
-                        bool pathIsMutable) {
+void SkBitmapDevice::drawPath(const SkDraw& draw, const SkPath& path,
+                              const SkPaint& paint, const SkMatrix* prePathMatrix,
+                              bool pathIsMutable) {
     CHECK_FOR_NODRAW_ANNOTATION(paint);
     draw.drawPath(path, paint, prePathMatrix, pathIsMutable);
 }
 
-void SkDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
-                          const SkMatrix& matrix, const SkPaint& paint) {
+void SkBitmapDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
+                                const SkMatrix& matrix, const SkPaint& paint) {
     draw.drawBitmap(bitmap, matrix, paint);
 }
 
-void SkDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
-                              const SkRect* src, const SkRect& dst,
-                              const SkPaint& paint,
-                              SkCanvas::DrawBitmapRectFlags flags) {
+void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
+                                    const SkRect* src, const SkRect& dst,
+                                    const SkPaint& paint,
+                                    SkCanvas::DrawBitmapRectFlags flags) {
     SkMatrix    matrix;
     SkRect      bitmapBounds, tmpSrc, tmpDst;
     SkBitmap    tmpBitmap;
 
     bitmapBounds.isetWH(bitmap.width(), bitmap.height());
 
     // Compute matrix from the two rectangles
     if (src) {
         tmpSrc = *src;
     } else {
@@ skipping 63 matching lines @@
 
     SkPaint paintWithShader(paint);
     paintWithShader.setStyle(SkPaint::kFill_Style);
     paintWithShader.setShader(s)->unref();
 
     // Call ourself, in case the subclass wanted to share this setup code
     // but handle the drawRect code themselves.
     this->drawRect(draw, *dstPtr, paintWithShader);
 }
 
-void SkDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap,
-                              int x, int y, const SkPaint& paint) {
+void SkBitmapDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap,
+                                int x, int y, const SkPaint& paint) {
     draw.drawSprite(bitmap, x, y, paint);
 }
 
-void SkDevice::drawText(const SkDraw& draw, const void* text, size_t len,
-                            SkScalar x, SkScalar y, const SkPaint& paint) {
+void SkBitmapDevice::drawText(const SkDraw& draw, const void* text, size_t len,
+                              SkScalar x, SkScalar y, const SkPaint& paint) {
     draw.drawText((const char*)text, len, x, y, paint);
 }
 
-void SkDevice::drawPosText(const SkDraw& draw, const void* text, size_t len,
-                               const SkScalar xpos[], SkScalar y,
-                               int scalarsPerPos, const SkPaint& paint) {
+void SkBitmapDevice::drawPosText(const SkDraw& draw, const void* text, size_t len,
+                                 const SkScalar xpos[], SkScalar y,
+                                 int scalarsPerPos, const SkPaint& paint) {
     draw.drawPosText((const char*)text, len, xpos, y, scalarsPerPos, paint);
 }
 
-void SkDevice::drawTextOnPath(const SkDraw& draw, const void* text,
-                                  size_t len, const SkPath& path,
-                                  const SkMatrix* matrix,
-                                  const SkPaint& paint) {
+void SkBitmapDevice::drawTextOnPath(const SkDraw& draw, const void* text,
+                                    size_t len, const SkPath& path,
+                                    const SkMatrix* matrix,
+                                    const SkPaint& paint) {
     draw.drawTextOnPath((const char*)text, len, path, matrix, paint);
 }
 
 #ifdef SK_BUILD_FOR_ANDROID
-void SkDevice::drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len,
-                                     const SkPoint pos[], const SkPaint& paint,
-                                     const SkPath& path, const SkMatrix* matrix) {
+void SkBitmapDevice::drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len,
+                                       const SkPoint pos[], const SkPaint& paint,
+                                       const SkPath& path, const SkMatrix* matrix) {
     draw.drawPosTextOnPath((const char*)text, len, pos, paint, path, matrix);
 }
 #endif
 
-void SkDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
-                                int vertexCount,
-                                const SkPoint verts[], const SkPoint textures[],
-                                const SkColor colors[], SkXfermode* xmode,
-                                const uint16_t indices[], int indexCount,
-                                const SkPaint& paint) {
+void SkBitmapDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
+                                  int vertexCount,
+                                  const SkPoint verts[], const SkPoint textures[],
+                                  const SkColor colors[], SkXfermode* xmode,
+                                  const uint16_t indices[], int indexCount,
+                                  const SkPaint& paint) {
     draw.drawVertices(vmode, vertexCount, verts, textures, colors, xmode,
                       indices, indexCount, paint);
 }
 
-void SkDevice::drawDevice(const SkDraw& draw, SkDevice* device,
-                              int x, int y, const SkPaint& paint) {
+void SkBitmapDevice::drawDevice(const SkDraw& draw, SkBaseDevice* device,
+                                int x, int y, const SkPaint& paint) {
     const SkBitmap& src = device->accessBitmap(false);
     draw.drawSprite(src, x, y, paint);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-bool SkDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
+bool SkBitmapDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
     if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
         // we're cool with the paint as is
         return false;
     }
 
     if (SkBitmap::kARGB_8888_Config != fBitmap.config() ||
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode)) {
         // turn off lcd
         flags->fFlags = paint.getFlags() & ~SkPaint::kLCDRenderText_Flag;
         flags->fHinting = paint.getHinting();
         return true;
     }
     // we're cool with the paint as is
     return false;
 }