WindowContextFactory_mac.h

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/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef WindowContextFactory_mac_DEFINED
#define WindowContextFactory_mac_DEFINED
 
#include "tools/window/WindowContext.h"
 
#include <Cocoa/Cocoa.h>
 
#include <memory>
 
namespace skwindow {
 
struct DisplayParams;
 
static inline CGFloat GetBackingScaleFactor(NSView* view) {
    #ifdef SK_BUILD_FOR_IOS
    UIScreen* screen = view.window.screen ?: [UIScreen mainScreen];
    return screen.nativeScale;
    #else
    NSScreen* screen = view.window.screen ?: [NSScreen mainScreen];
    return screen.backingScaleFactor;
    #endif
}
 
struct MacWindowInfo {
    NSView*   fMainView;
};
 
#if defined(SK_GL) || defined(SK_ANGLE)
static inline NSOpenGLPixelFormat* GetGLPixelFormat(int sampleCount) {
    constexpr int kMaxAttributes = 19;
    NSOpenGLPixelFormatAttribute attributes[kMaxAttributes];
    int numAttributes = 0;
    attributes[numAttributes++] = NSOpenGLPFAAccelerated;
    attributes[numAttributes++] = NSOpenGLPFAClosestPolicy;
    attributes[numAttributes++] = NSOpenGLPFADoubleBuffer;
    attributes[numAttributes++] = NSOpenGLPFAOpenGLProfile;
    attributes[numAttributes++] = NSOpenGLProfileVersion3_2Core;
    attributes[numAttributes++] = NSOpenGLPFAColorSize;
    attributes[numAttributes++] = 24;
    attributes[numAttributes++] = NSOpenGLPFAAlphaSize;
    attributes[numAttributes++] = 8;
    attributes[numAttributes++] = NSOpenGLPFADepthSize;
    attributes[numAttributes++] = 0;
    attributes[numAttributes++] = NSOpenGLPFAStencilSize;
    attributes[numAttributes++] = 8;
    if (sampleCount > 1) {
        attributes[numAttributes++] = NSOpenGLPFAMultisample;
        attributes[numAttributes++] = NSOpenGLPFASampleBuffers;
        attributes[numAttributes++] = 1;
        attributes[numAttributes++] = NSOpenGLPFASamples;
        attributes[numAttributes++] = sampleCount;
    } else {
        attributes[numAttributes++] = NSOpenGLPFASampleBuffers;
        attributes[numAttributes++] = 0;
    }
    attributes[numAttributes++] = 0;
    SkASSERT(numAttributes <= kMaxAttributes);
    return [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes];
}
#endif  // defined(SK_GL) || defined(SK_ANGLE)
 
#ifdef SK_VULKAN
inline std::unique_ptr<WindowContext> MakeVulkanForMac(const MacWindowInfo&, const DisplayParams&) {
    // No Vulkan support on Mac.
    return nullptr;
}
#endif
 
#ifdef SK_GL
std::unique_ptr<WindowContext> MakeRasterForMac(const MacWindowInfo&, const DisplayParams&);
std::unique_ptr<WindowContext> MakeGLForMac(const MacWindowInfo&, const DisplayParams&);
#endif
 
#ifdef SK_ANGLE
std::unique_ptr<WindowContext> MakeANGLEForMac(const MacWindowInfo&, const DisplayParams&);
#endif
 
#ifdef SK_DAWN
#if defined(SK_GRAPHITE)
std::unique_ptr<WindowContext> MakeGraphiteDawnMetalForMac(const MacWindowInfo&, const DisplayParams&);
#endif
#endif
 
#ifdef SK_METAL
std::unique_ptr<WindowContext> MakeMetalForMac(const MacWindowInfo&, const DisplayParams&);
#if defined(SK_GRAPHITE)
std::unique_ptr<WindowContext> MakeGraphiteMetalForMac(const MacWindowInfo&, const DisplayParams&);
#endif
#endif
 
}  // namespace skwindow
 
#endif