4119443532
To use, see instructions in experimental/skottie_ios/README.md . No-Try: true Change-Id: I4fb71576c5e38c7776d14561930b8c2598cfb48f Reviewed-on: https://skia-review.googlesource.com/c/skia/+/240284 Commit-Queue: Hal Canary <halcanary@google.com> Reviewed-by: Jim Van Verth <jvanverth@google.com>
96 lines
2.8 KiB
Plaintext
96 lines
2.8 KiB
Plaintext
//Copyright 2019 Google LLC.
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//Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "experimental/skottie_ios/SkottieMtkView.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTime.h"
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#include "modules/skottie/include/Skottie.h"
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#include "experimental/skottie_ios/SkMetalViewBridge.h"
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@implementation SkottieMtkView {
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sk_sp<skottie::Animation> fAnimation; // owner
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CGSize fSize;
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double fStartTime;
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double fTime;
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SkMatrix fMatrix;
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SkRect fAnimRect;
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bool fPaused;
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}
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-(void)dealloc {
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fAnimation = nullptr;
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[super dealloc];
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}
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- (void)drawRect:(CGRect)rect {
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[super drawRect:rect];
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// TODO(halcanary): Use the rect and the InvalidationController to speed up rendering.
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if (!fAnimation || ![[self currentDrawable] texture] || ![self grContext]) {
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return;
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}
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CGSize size = [self drawableSize];
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if (size.width != fSize.width || size.height != fSize.height) {
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float aw = fAnimRect.right(),
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ah = fAnimRect.bottom();
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if (aw > 0 && ah > 0) {
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float scale = std::min(size.width / aw, size.height / ah);
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fMatrix.setScaleTranslate(scale,
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scale,
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((float)size.width - aw * scale) * 0.5f,
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((float)size.height - ah * scale) * 0.5f);
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} else {
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fMatrix = SkMatrix();
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}
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fSize = size;
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}
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SkPaint whitePaint(SkColors::kWhite);
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if (!fPaused) {
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fTime = SkTime::GetNSecs();
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fAnimation->seekFrameTime(std::fmod(1e-9 * (fTime - fStartTime),
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fAnimation->duration()), nullptr);
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}
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sk_sp<SkSurface> surface = SkMtkViewToSurface(self, [self grContext]);
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if (!surface) {
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NSLog(@"error: no sksurface");
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return;
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}
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SkCanvas* canvas = surface->getCanvas();
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canvas->concat(fMatrix);
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canvas->drawRect(fAnimRect, whitePaint);
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fAnimation->render(canvas);
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surface->flush();
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surface = nullptr;
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[[self currentDrawable] present];
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}
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- (BOOL)loadAnimation:(NSData*) data {
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skottie::Animation::Builder builder;
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fAnimation = builder.make((const char*)[data bytes], (size_t)[data length]);
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fTime = fStartTime = SkTime::GetNSecs();
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fSize = {0, 0};
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fAnimRect = fAnimation ? SkRect::MakeSize(fAnimation->size()) : SkRect{0, 0, 0, 0};
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return fAnimation != nullptr;
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}
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- (CGSize)size {
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if (fAnimation) {
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const SkSize& s = fAnimation->size();
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return {(CGFloat)s.width(), (CGFloat)s.height()};
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}
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return {0, 0};
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}
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- (BOOL)togglePaused {
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fPaused = !fPaused;
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if (!fPaused) {
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fStartTime += (SkTime::GetNSecs() - fTime);
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}
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return fPaused;
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}
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@end
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