Revert "Use int when possible to calculate atlas indices in shaders."

This reverts commit 999ec57291dc7cf1d8e3a745627670e6cadc1c12.

Reason for revert: Causing issues with NexusPlayer Vulkan.

Original change's description:
> Use int when possible to calculate atlas indices in shaders.
> 
> On certain iOS devices half has a mantissa of only 10 bits, which is not
> enough to perform the floating point trickery to get the lower bits
> out of the "texture coordinates". Instead we use int if available, and
> float if not available.
> 
> Also re-enables multitexturing for iOS and adds a sample which
> stresses the issue.
> 
> Bug: skia:7285
> Change-Id: I365532c7cbbcca7c7753af209bef46e05be49e11
> Reviewed-on: https://skia-review.googlesource.com/71181
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>

TBR=jvanverth@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: I82801a73a2a8067588049b213f010ff25f4014f3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7285
Reviewed-on: https://skia-review.googlesource.com/74001
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

1 files changed, 0 insertions, 107 deletions

diff --git a/samplecode/SampleFlutterAnimate.cpp b/samplecode/SampleFlutterAnimate.cpp
deleted file mode 100644
index 63b453b240..0000000000
--- a/samplecode/SampleFlutterAnimate.cpp
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SampleCode.h"
-#include "SkAnimTimer.h"
-#include "SkView.h"
-#include "SkCanvas.h"
-#include "SkUtils.h"
-#include "SkColorPriv.h"
-#include "SkColorFilter.h"
-#include "SkImage.h"
-#include "SkRandom.h"
-#include "SkSystemEventTypes.h"
-#include "SkTime.h"
-#include "SkTypeface.h"
-#include "Timer.h"
-
-#if SK_SUPPORT_GPU
-#include "GrContext.h"
-#endif
-
-class FlutterAnimateView : public SampleView {
-public:
-    FlutterAnimateView() : fCurrTime(0), fResetTime(0) {}
-
-protected:
-    void onOnceBeforeDraw() override {
-        initChars();
-    }
-
-    // overrides from SkEventSink
-    bool onQuery(SkEvent* evt) override {
-        if (SampleCode::TitleQ(*evt)) {
-            SampleCode::TitleR(evt, "FlutterAnimate");
-            return true;
-        }
-
-        return this->INHERITED::onQuery(evt);
-    }
-
-    void onDrawContent(SkCanvas* canvas) override {
-        SkPaint paint;
-        paint.setTypeface(SkTypeface::MakeFromFile("/skimages/samplefont.ttf"));
-        paint.setAntiAlias(true);
-        paint.setFilterQuality(kMedium_SkFilterQuality);
-        paint.setTextSize(50);
-
-        canvas->clear(SK_ColorWHITE);
-        for (int i = 0; i < kNumChars; ++i) {
-            canvas->save();
-            double rot = fChars[i].fStartRotation + (fChars[i].fEndRotation - fChars[i].fStartRotation)*fCurrTime/kDuration;
-            canvas->translate(fChars[i].fPosition.fX + 35,fChars[i].fPosition.fY - 50);
-            canvas->rotate(rot*180.0/SK_MScalarPI);
-            canvas->translate(-35,+50);
-            canvas->drawString(fChars[i].fChar, 0, 0,
-                               paint);
-            canvas->restore();
-        }
-    }
-
-    bool onAnimate(const SkAnimTimer& timer) override {
-        fCurrTime = timer.secs() - fResetTime;
-        if (fCurrTime > kDuration) {
-            this->initChars();
-            fResetTime = timer.secs();
-            fCurrTime = 0;
-        }
-
-        return true;
-    }
-
-private:
-    void initChars() {
-        for (int i = 0; i < kNumChars; ++i) {
-            char c = fRand.nextULessThan(26) + 65;
-            fChars[i].fChar.set(&c, 1);
-            fChars[i].fPosition = SkPoint::Make(fRand.nextF()*748 + 10, fRand.nextF()*1004 + 10);
-            fChars[i].fStartRotation = fRand.nextF();
-            fChars[i].fEndRotation = fRand.nextF() * 20 - 10;
-        }
-    }
-
-    static constexpr double kDuration = 5.0;
-    double fCurrTime;
-    double fResetTime;
-    SkRandom fRand;
-
-    struct AnimatedChar {
-        SkString fChar;
-        SkPoint  fPosition;
-        SkScalar fStartRotation;
-        SkScalar fEndRotation;
-    };
-    static constexpr int kNumChars = 40;
-    AnimatedChar fChars[kNumChars];
-
-    typedef SampleView INHERITED;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-static SkView* MyFactory() { return new FlutterAnimateView; }
-static SkViewRegister reg(MyFactory);