pdfviewer: All NulCanvas (does not draw operations), TrackDevice (trackes what pixels have been changed)
Review URL: https://codereview.chromium.org/19793006
git-svn-id: http://skia.googlecode.com/svn/trunk@10236 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/SkTrackDevice.h b/experimental/PdfViewer/SkTrackDevice.h
new file mode 100644
index 0000000..eb0e19d
--- /dev/null
+++ b/experimental/PdfViewer/SkTrackDevice.h
@@ -0,0 +1,177 @@
+#ifndef EXPERIMENTAL_PDFVIEWER_SKTRACKDEVICE_H_
+#define EXPERIMENTAL_PDFVIEWER_SKTRACKDEVICE_H_
+
+#include "SkDevice.h"
+#include "SkTracker.h"
+
+class SkTrackDevice : public SkDevice {
+public:
+ SK_DECLARE_INST_COUNT(SkTrackDevice)
+
+ SkTrackDevice(const SkBitmap& bitmap) : SkDevice(bitmap)
+ , fTracker(NULL) {}
+
+ SkTrackDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties)
+ : SkDevice(bitmap, deviceProperties)
+ , fTracker(NULL) {}
+
+ SkTrackDevice(SkBitmap::Config config, int width, int height, bool isOpaque = false)
+ : SkDevice(config, width, height, isOpaque)
+ , fTracker(NULL) {}
+
+ SkTrackDevice(SkBitmap::Config config, int width, int height, bool isOpaque,
+ const SkDeviceProperties& deviceProperties)
+ : SkDevice(config, width, height, isOpaque, deviceProperties)
+ , fTracker(NULL) {}
+
+ virtual ~SkTrackDevice() {}
+
+ void installTracker(SkTracker* tracker) {
+ fTracker = tracker;
+ fTracker->newFrame();
+ }
+
+protected:
+ virtual void clear(SkColor color) {
+ before();
+ INHERITED::clear(color);
+ after();
+ }
+
+ virtual void drawPaint(const SkDraw& dummy1, const SkPaint& paint) {
+ before();
+ INHERITED::drawPaint(dummy1, paint);
+ after();
+ }
+
+ virtual void drawPoints(const SkDraw& dummy1, SkCanvas::PointMode mode, size_t count,
+ const SkPoint dummy2[], const SkPaint& paint) {
+ before();
+ INHERITED::drawPoints(dummy1, mode, count, dummy2, paint);
+ after();
+ }
+
+ virtual void drawRect(const SkDraw& dummy1, const SkRect& r,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawRect(dummy1, r, paint);
+ after();
+ }
+
+
+ virtual void drawOval(const SkDraw& dummy1, const SkRect& oval,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawOval(dummy1, oval, paint);
+ after();
+ }
+
+ virtual void drawRRect(const SkDraw& dummy1, const SkRRect& rr,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawRRect(dummy1, rr, paint);
+ after();
+ }
+
+ virtual void drawPath(const SkDraw& dummy1, const SkPath& path,
+ const SkPaint& paint,
+ const SkMatrix* prePathMatrix = NULL,
+ bool pathIsMutable = false) {
+ before();
+ INHERITED::drawPath(dummy1, path, paint, prePathMatrix, pathIsMutable);
+ after();
+ }
+
+ virtual void drawBitmap(const SkDraw& dummy1, const SkBitmap& bitmap,
+ const SkIRect* srcRectOrNull,
+ const SkMatrix& matrix, const SkPaint& paint) {
+ before();
+ INHERITED::drawBitmap(dummy1, bitmap, srcRectOrNull, matrix, paint);
+ after();
+ }
+
+ virtual void drawSprite(const SkDraw& dummy1, const SkBitmap& bitmap,
+ int x, int y, const SkPaint& paint) {
+ before();
+ INHERITED::drawSprite(dummy1, bitmap, x, y, paint);
+ after();
+ }
+
+ virtual void drawBitmapRect(const SkDraw& dummy1, const SkBitmap& dummy2,
+ const SkRect* srcOrNull, const SkRect& dst,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawBitmapRect(dummy1, dummy2, srcOrNull, dst, paint);
+ after();
+ }
+
+ virtual void drawText(const SkDraw& dummy1, const void* text, size_t len,
+ SkScalar x, SkScalar y, const SkPaint& paint) {
+ before();
+ INHERITED::drawText(dummy1, text, len, x, y, paint);
+ after();
+ }
+
+ virtual void drawPosText(const SkDraw& dummy1, const void* text, size_t len,
+ const SkScalar pos[], SkScalar constY,
+ int scalarsPerPos, const SkPaint& paint) {
+ before();
+ INHERITED::drawPosText(dummy1, text, len, pos, constY, scalarsPerPos, paint);
+ after();
+ }
+
+ virtual void drawTextOnPath(const SkDraw& dummy1, const void* text, size_t len,
+ const SkPath& path, const SkMatrix* matrix,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawTextOnPath(dummy1, text, len, path, matrix, paint);
+ after();
+ }
+
+#ifdef SK_BUILD_FOR_ANDROID
+ virtual void drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len,
+ const SkPoint pos[], const SkPaint& paint,
+ const SkPath& path, const SkMatrix* matrix) {
+ before();
+ INHERITED::drawPosTextOnPath(draw, text, len, pos, paint, path, matrix);
+ after();
+ }
+#endif
+ virtual void drawVertices(const SkDraw& dummy1, SkCanvas::VertexMode dummy2, int vertexCount,
+ const SkPoint verts[], const SkPoint texs[],
+ const SkColor colors[], SkXfermode* xmode,
+ const uint16_t indices[], int indexCount,
+ const SkPaint& paint) {
+ before();
+ INHERITED::drawVertices(dummy1, dummy2, vertexCount,verts, texs,colors, xmode, indices, indexCount, paint);
+ after();
+ }
+
+ virtual void drawDevice(const SkDraw& dummy1, SkDevice* dummy2, int x, int y,
+ const SkPaint& dummy3) {
+ before();
+ INHERITED::drawDevice(dummy1, dummy2, x, y, dummy3);
+ after();
+ }
+
+private:
+ void before() {
+ if (fTracker) {
+ fTracker->before(accessBitmap(false));
+ }
+ }
+
+ // any/all of the expected touched has to be changed, and all expected untouched must be intact
+ void after() {
+ if (fTracker) {
+ fTracker->after(accessBitmap(false));
+ }
+ }
+
+private:
+ SkTracker* fTracker;
+
+ typedef SkDevice INHERITED;
+};
+
+#endif // EXPERIMENTAL_PDFVIEWER_SKTRACKDEVICE_H_