ebiten/internal/ui/ui_ios.go

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// Copyright 2022 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ui
// #cgo CFLAGS: -x objective-c
// #cgo LDFLAGS: -framework Foundation -framework UIKit
//
// #import <UIKit/UIKit.h>
//
// static void displayInfoOnMainThread(float* width, float* height, float* scale, UIView* view) {
// *width = 0;
// *height = 0;
// *scale = 1;
// UIWindow* window = view.window;
// if (!window) {
// return;
// }
// UIWindowScene* scene = window.windowScene;
// if (!scene) {
// return;
// }
// CGRect bounds = scene.screen.bounds;
// *width = bounds.size.width;
// *height = bounds.size.height;
// *scale = scene.screen.nativeScale;
// }
//
// static void displayInfo(float* width, float* height, float* scale, uintptr_t viewPtr) {
// *width = 0;
// *height = 0;
// *scale = 1;
// if (!viewPtr) {
// return;
// }
// UIView* view = (__bridge UIView*)(void*)viewPtr;
// if ([NSThread isMainThread]) {
// displayInfoOnMainThread(width, height, scale, view);
// return;
// }
// __block float w, h, s;
// dispatch_sync(dispatch_get_main_queue(), ^{
// displayInfoOnMainThread(&w, &h, &s, view);
// });
// *width = w;
// *height = h;
// *scale = s;
// }
import "C"
import (
"errors"
"fmt"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl"
)
type graphicsDriverCreatorImpl struct {
colorSpace graphicsdriver.ColorSpace
}
func (g *graphicsDriverCreatorImpl) newAuto() (graphicsdriver.Graphics, GraphicsLibrary, error) {
m, err1 := g.newMetal()
if err1 == nil {
return m, GraphicsLibraryMetal, nil
}
o, err2 := g.newOpenGL()
if err2 == nil {
return o, GraphicsLibraryMetal, nil
}
return nil, GraphicsLibraryUnknown, fmt.Errorf("ui: failed to choose graphics drivers: Metal: %v, OpenGL: %v", err1, err2)
}
func (g *graphicsDriverCreatorImpl) newOpenGL() (graphicsdriver.Graphics, error) {
return opengl.NewGraphics()
}
func (*graphicsDriverCreatorImpl) newDirectX() (graphicsdriver.Graphics, error) {
return nil, errors.New("ui: DirectX is not supported in this environment")
}
func (g *graphicsDriverCreatorImpl) newMetal() (graphicsdriver.Graphics, error) {
return metal.NewGraphics(g.colorSpace)
}
func (*graphicsDriverCreatorImpl) newPlayStation5() (graphicsdriver.Graphics, error) {
return nil, errors.New("ui: PlayStation 5 is not supported in this environment")
}
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func (u *UserInterface) SetUIView(uiview uintptr) error {
u.uiView.Store(uiview)
select {
case err := <-u.errCh:
return err
case <-u.graphicsLibraryInitCh:
}
// This function should be called only when the graphics library is Metal.
if g, ok := u.graphicsDriver.(interface{ SetUIView(uintptr) }); ok {
g.SetUIView(uiview)
}
return nil
}
func (u *UserInterface) IsGL() (bool, error) {
select {
case err := <-u.errCh:
return false, err
case <-u.graphicsLibraryInitCh:
}
return u.GraphicsLibrary() == GraphicsLibraryOpenGL, nil
}
func dipToNativePixels(x float64, scale float64) float64 {
return x
}
func dipFromNativePixels(x float64, scale float64) float64 {
return x
}
func (u *UserInterface) displayInfo() (int, int, float64, bool) {
view := u.uiView.Load()
if view == 0 {
return 0, 0, 1, false
}
var cWidth, cHeight, cScale C.float
C.displayInfo(&cWidth, &cHeight, &cScale, C.uintptr_t(view))
scale := float64(cScale)
width := int(dipFromNativePixels(float64(cWidth), scale))
height := int(dipFromNativePixels(float64(cHeight), scale))
return width, height, scale, true
}