| // Copyright 2020 Google LLC. |
| // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. |
| |
| #include "tools/skottie_ios_app/SkiaContext.h" |
| |
| #include "include/core/SkColorSpace.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTime.h" |
| #include "include/gpu/GrBackendSurface.h" |
| #include "include/gpu/GrDirectContext.h" |
| #include "include/gpu/gl/GrGLInterface.h" |
| #include "include/gpu/gl/GrGLTypes.h" |
| |
| #import <GLKit/GLKit.h> |
| #import <UIKit/UIKit.h> |
| #import <OpenGLES/ES3/gl.h> |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| static void configure_glkview_for_skia(GLKView* view) { |
| [view setDrawableColorFormat:GLKViewDrawableColorFormatRGBA8888]; |
| [view setDrawableDepthFormat:GLKViewDrawableDepthFormat24]; |
| [view setDrawableStencilFormat:GLKViewDrawableStencilFormat8]; |
| } |
| |
| static sk_sp<SkSurface> make_gl_surface(GrDirectContext* dContext, int width, int height) { |
| static constexpr int kStencilBits = 8; |
| static constexpr int kSampleCount = 1; |
| static const SkSurfaceProps surfaceProps; |
| if (!dContext || width <= 0 || height <= 0) { |
| return nullptr; |
| } |
| GLint fboid = 0; |
| glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &fboid); |
| return SkSurface::MakeFromBackendRenderTarget( |
| dContext, |
| GrBackendRenderTarget(width, |
| height, |
| kSampleCount, |
| kStencilBits, |
| GrGLFramebufferInfo{(GrGLuint)fboid, GL_RGBA8}), |
| kBottomLeft_GrSurfaceOrigin, |
| kRGBA_8888_SkColorType, |
| nullptr, |
| &surfaceProps); |
| } |
| |
| // A UIView that uses a GL-backed SkSurface to draw. |
| @interface SkiaGLView : GLKView |
| @property (strong) SkiaViewController* controller; |
| |
| // Override of the UIView interface. |
| - (void)drawRect:(CGRect)rect; |
| |
| // Required initializer. |
| - (instancetype)initWithFrame:(CGRect)frame |
| withEAGLContext:(EAGLContext*)eaglContext |
| withDirectContext:(GrDirectContext*)dContext; |
| @end |
| |
| @implementation SkiaGLView { |
| GrDirectContext* fDContext; |
| } |
| |
| - (instancetype)initWithFrame:(CGRect)frame |
| withEAGLContext:(EAGLContext*)eaglContext |
| withDirectContext:(GrDirectContext*)dContext { |
| self = [super initWithFrame:frame context:eaglContext]; |
| fDContext = dContext; |
| configure_glkview_for_skia(self); |
| return self; |
| } |
| |
| - (void)drawRect:(CGRect)rect { |
| SkiaViewController* viewController = [self controller]; |
| static constexpr double kFrameRate = 1.0 / 30.0; |
| double next = [viewController isPaused] ? 0 : kFrameRate + SkTime::GetNSecs() * 1e-9; |
| |
| [super drawRect:rect]; |
| |
| int width = (int)[self drawableWidth], |
| height = (int)[self drawableHeight]; |
| if (!(fDContext)) { |
| NSLog(@"Error: GrDirectContext missing.\n"); |
| return; |
| } |
| if (sk_sp<SkSurface> surface = make_gl_surface(fDContext, width, height)) { |
| [viewController draw:rect |
| toCanvas:(surface->getCanvas()) |
| atSize:CGSize{(CGFloat)width, (CGFloat)height}]; |
| surface->flushAndSubmit(); |
| } |
| if (next) { |
| [NSTimer scheduledTimerWithTimeInterval:std::max(0.0, next - SkTime::GetNSecs() * 1e-9) |
| target:self |
| selector:@selector(setNeedsDisplay) |
| userInfo:nil |
| repeats:NO]; |
| } |
| } |
| @end |
| |
| @interface SkiaGLContext : SkiaContext |
| @property (strong) EAGLContext* eaglContext; |
| - (instancetype) init; |
| - (UIView*) makeViewWithController:(SkiaViewController*)vc withFrame:(CGRect)frame; |
| - (SkiaViewController*) getViewController:(UIView*)view; |
| @end |
| |
| @implementation SkiaGLContext { |
| sk_sp<GrDirectContext> fDContext; |
| } |
| - (instancetype) init { |
| self = [super init]; |
| [self setEaglContext:[[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3]]; |
| if (![self eaglContext]) { |
| NSLog(@"Falling back to GLES2.\n"); |
| [self setEaglContext:[[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]]; |
| } |
| if (![self eaglContext]) { |
| NSLog(@"[[EAGLContext alloc] initWithAPI:...] failed"); |
| return nil; |
| } |
| EAGLContext* oldContext = [EAGLContext currentContext]; |
| [EAGLContext setCurrentContext:[self eaglContext]]; |
| fDContext = GrDirectContext::MakeGL(nullptr, GrContextOptions()); |
| [EAGLContext setCurrentContext:oldContext]; |
| if (!fDContext) { |
| NSLog(@"GrDirectContext::MakeGL failed"); |
| return nil; |
| } |
| return self; |
| } |
| |
| - (UIView*) makeViewWithController:(SkiaViewController*)vc withFrame:(CGRect)frame { |
| SkiaGLView* skiaView = [[SkiaGLView alloc] initWithFrame:frame |
| withEAGLContext:[self eaglContext] |
| withDirectContext:fDContext.get()]; |
| [skiaView setController:vc]; |
| return skiaView; |
| } |
| - (SkiaViewController*) getViewController:(UIView*)view { |
| return [view isKindOfClass:[SkiaGLView class]] ? [(SkiaGLView*)view controller] : nil; |
| } |
| @end |
| |
| SkiaContext* MakeSkiaGLContext() { return [[SkiaGLContext alloc] init]; } |