remove unused SkBitmap::scrollRect API

gm/bitmapscroll.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 "gm.h"
-
-namespace skiagm {
-
-/** Create a bitmap image suitable for testing SkBitmap::scrollRect().
- *
- *  @param quarterWidth bitmap will be 4x this many pixels wide
- *  @param quarterHeight bitmap will be 4x this many pixels tall
- *  @param bitmap the bitmap data is written into this object
- */
-static void make_bitmap(int quarterWidth, int quarterHeight, SkBitmap *bitmap) {
-    SkPaint pRed, pWhite, pGreen, pBlue, pLine, pAlphaGray;
-    pRed.setColor(0xFFFF9999);
-    pWhite.setColor(0xFFFFFFFF);
-    pGreen.setColor(0xFF99FF99);
-    pBlue.setColor(0xFF9999FF);
-    pLine.setColor(0xFF000000);
-    pLine.setStyle(SkPaint::kStroke_Style);
-    pAlphaGray.setColor(0x66888888);
-
-    // Prepare bitmap, and a canvas that draws into it.
-    bitmap->allocN32Pixels(quarterWidth*4, quarterHeight*4);
-    SkCanvas canvas(*bitmap);
-
-    SkScalar w = SkIntToScalar(quarterWidth);
-    SkScalar h = SkIntToScalar(quarterHeight);
-    canvas.drawRectCoords(  0,   0, w*2, h*2, pRed);
-    canvas.drawRectCoords(w*2,   0, w*4, h*2, pGreen);
-    canvas.drawRectCoords(  0, h*2, w*2, h*4, pBlue);
-    canvas.drawRectCoords(w*2, h*2, w*4, h*4, pWhite);
-    canvas.drawRectCoords(w, h, w*3, h*3, pAlphaGray);
-    canvas.drawLine(w*2,   0, w*2, h*4, pLine);
-    canvas.drawLine(  0, h*2, w*4, h*2, pLine);
-    canvas.drawRectCoords(w, h, w*3, h*3, pLine);
-}
-
-class BitmapScrollGM : public GM {
-    bool fInited;
-    void init() {
-        if (fInited) {
-            return;
-        }
-        fInited = true;
-        // Create the original bitmap.
-        make_bitmap(quarterWidth, quarterHeight, &origBitmap);
-    }
-
-public:
-    BitmapScrollGM() {
-        fInited = false;
-        this->setBGColor(0xFFDDDDDD);
-    }
-
-protected:
-    SkString onShortName() override {
-        return SkString("bitmapscroll");
-    }
-
-    SkISize onISize() override {
-      return SkISize::Make(800, 600);
-    }
-
-    void onDraw(SkCanvas* canvas) override {
-        this->init();
-        SkIRect scrollCenterRegion = SkIRect::MakeXYWH(
-            quarterWidth, quarterHeight, quarterWidth*2+1, quarterHeight*2+1);
-        int x = quarterWidth;
-        int y = quarterHeight;
-        int xSpacing = quarterWidth * 20;
-        int ySpacing = quarterHeight * 16;
-
-        // Draw left-hand text labels.
-        drawLabel(canvas, "scroll entire bitmap",
-                  x, y, x, y + ySpacing);
-        drawLabel(canvas, "scroll part of bitmap",
-                  x, y + ySpacing, x, y + ySpacing*2);
-        x += 30;
-
-        // Draw various permutations of scrolled bitmaps, scrolling a bit
-        // further each time.
-        draw9(canvas, x, y, NULL, quarterWidth*1/2, quarterHeight*1/2);
-        draw9(canvas, x, y+ySpacing, &scrollCenterRegion,
-              quarterWidth*1/2, quarterHeight*1/2);
-        x += xSpacing;
-        draw9(canvas, x, y, NULL, quarterWidth*3/2, quarterHeight*3/2);
-        draw9(canvas, x, y+ySpacing, &scrollCenterRegion,
-              quarterWidth*3/2, quarterHeight*3/2);
-        x += xSpacing;
-        draw9(canvas, x, y, NULL, quarterWidth*5/2, quarterHeight*5/2);
-        draw9(canvas, x, y+ySpacing, &scrollCenterRegion,
-              quarterWidth*5/2, quarterHeight*5/2);
-        x += xSpacing;
-        draw9(canvas, x, y, NULL, quarterWidth*9/2, quarterHeight*9/2);
-        draw9(canvas, x, y+ySpacing, &scrollCenterRegion,
-              quarterWidth*9/2, quarterHeight*9/2);
-    }
-
-    void drawLabel(SkCanvas* canvas, const char *text, int startX, int startY,
-                 int endX, int endY) {
-        SkPaint paint;
-        sk_tool_utils::set_portable_typeface(&paint);
-        paint.setColor(0xFF000000);
-        SkPath path;
-        path.moveTo(SkIntToScalar(startX), SkIntToScalar(startY));
-        path.lineTo(SkIntToScalar(endX), SkIntToScalar(endY));
-        canvas->drawTextOnPath(text, strlen(text), path, NULL, paint);
-    }
-
-    /** Stamp out 9 copies of origBitmap, scrolled in each direction (and
-     *  not scrolled at all).
-     */
-    void draw9(SkCanvas* canvas, int x, int y, SkIRect* subset,
-               int scrollX, int scrollY) {
-        for (int yMult=-1; yMult<=1; yMult++) {
-            for (int xMult=-1; xMult<=1; xMult++) {
-                // Figure out the (x,y) to draw this copy at
-                SkScalar bitmapX = SkIntToScalar(
-                    x + quarterWidth * 5 * (xMult+1));
-                SkScalar bitmapY = SkIntToScalar(
-                    y + quarterHeight * 5 * (yMult+1));
-
-                // Scroll a new copy of the bitmap, and then draw it.
-                // scrollRect() should always return true, even if it's a no-op
-                SkBitmap scrolledBitmap;
-                SkDEBUGCODE(bool copyToReturnValue = )origBitmap.copyTo(
-                    &scrolledBitmap, origBitmap.colorType());
-                SkASSERT(copyToReturnValue);
-                SkDEBUGCODE(bool scrollRectReturnValue = )scrolledBitmap.scrollRect(
-                    subset, scrollX * xMult, scrollY * yMult);
-                SkASSERT(scrollRectReturnValue);
-                canvas->drawBitmap(scrolledBitmap, bitmapX, bitmapY);
-            }
-        }
-    }
-
-private:
-    typedef GM INHERITED;
-    static const int quarterWidth = 10;
-    static const int quarterHeight = 14;
-    SkBitmap origBitmap;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-static GM* MyFactory(void*) { return new BitmapScrollGM; }
-static GMRegistry reg(MyFactory);
-
-}