mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 06:57:27 +01:00
178 lines
6.3 KiB
Go
178 lines
6.3 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build darwin
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// +build darwin
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// Package ca provides access to Apple's Core Animation API (https://developer.apple.com/documentation/quartzcore).
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//
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// This package is in very early stages of development.
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// It's a minimal implementation with scope limited to
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// supporting the movingtriangle example.
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package ca
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import (
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"errors"
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"unsafe"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
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)
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// Suppress the warnings about availability guard with -Wno-unguarded-availability-new.
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// It is because old Xcode (8 or older?) does not accept @available syntax.
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// #cgo CFLAGS: -Wno-unguarded-availability-new
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// #cgo !ios CFLAGS: -mmacosx-version-min=10.12
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// #cgo LDFLAGS: -framework QuartzCore -framework Foundation -framework CoreGraphics
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//
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// #include "ca.h"
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import "C"
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// Layer is an object that manages image-based content and
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// allows you to perform animations on that content.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/calayer.
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type Layer interface {
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// Layer returns the underlying CALayer * pointer.
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Layer() unsafe.Pointer
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}
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// MetalLayer is a Core Animation Metal layer, a layer that manages a pool of Metal drawables.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer.
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type MetalLayer struct {
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metalLayer unsafe.Pointer
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}
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// MakeMetalLayer creates a new Core Animation Metal layer.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer.
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func MakeMetalLayer() MetalLayer {
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return MetalLayer{C.MakeMetalLayer()}
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}
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// Layer implements the Layer interface.
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func (ml MetalLayer) Layer() unsafe.Pointer { return ml.metalLayer }
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// PixelFormat returns the pixel format of textures for rendering layer content.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478155-pixelformat.
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func (ml MetalLayer) PixelFormat() mtl.PixelFormat {
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return mtl.PixelFormat(C.MetalLayer_PixelFormat(ml.metalLayer))
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}
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// SetDevice sets the Metal device responsible for the layer's drawable resources.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478163-device.
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func (ml MetalLayer) SetDevice(device mtl.Device) {
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C.MetalLayer_SetDevice(ml.metalLayer, device.Device())
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}
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// SetOpaque a Boolean value indicating whether the layer contains completely opaque content.
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func (ml MetalLayer) SetOpaque(opaque bool) {
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if opaque {
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C.MetalLayer_SetOpaque(ml.metalLayer, 1)
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} else {
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C.MetalLayer_SetOpaque(ml.metalLayer, 0)
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}
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}
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// SetPixelFormat controls the pixel format of textures for rendering layer content.
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//
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// The pixel format for a Metal layer must be PixelFormatBGRA8UNorm, PixelFormatBGRA8UNormSRGB,
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// PixelFormatRGBA16Float, PixelFormatBGRA10XR, or PixelFormatBGRA10XRSRGB.
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// SetPixelFormat panics for other values.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478155-pixelformat.
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func (ml MetalLayer) SetPixelFormat(pf mtl.PixelFormat) {
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e := C.MetalLayer_SetPixelFormat(ml.metalLayer, C.uint16_t(pf))
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if e != nil {
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panic(errors.New(C.GoString(e)))
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}
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}
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// SetMaximumDrawableCount controls the number of Metal drawables in the resource pool
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// managed by Core Animation.
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//
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// It can set to 2 or 3 only. SetMaximumDrawableCount panics for other values.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/2938720-maximumdrawablecount.
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func (ml MetalLayer) SetMaximumDrawableCount(count int) {
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e := C.MetalLayer_SetMaximumDrawableCount(ml.metalLayer, C.uint_t(count))
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if e != nil {
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panic(errors.New(C.GoString(e)))
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}
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}
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// SetDisplaySyncEnabled controls whether the Metal layer and its drawables
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// are synchronized with the display's refresh rate.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/2887087-displaysyncenabled.
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func (ml MetalLayer) SetDisplaySyncEnabled(enabled bool) {
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switch enabled {
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case true:
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C.MetalLayer_SetDisplaySyncEnabled(ml.metalLayer, 1)
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case false:
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C.MetalLayer_SetDisplaySyncEnabled(ml.metalLayer, 0)
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}
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}
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// SetDrawableSize sets the size, in pixels, of textures for rendering layer content.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478174-drawablesize.
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func (ml MetalLayer) SetDrawableSize(width, height int) {
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C.MetalLayer_SetDrawableSize(ml.metalLayer, C.double(width), C.double(height))
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}
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// NextDrawable returns a Metal drawable.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478172-nextdrawable.
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func (ml MetalLayer) NextDrawable() (MetalDrawable, error) {
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md := C.MetalLayer_NextDrawable(ml.metalLayer)
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if md == nil {
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return MetalDrawable{}, errors.New("nextDrawable returned nil")
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}
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return MetalDrawable{md}, nil
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}
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// SetFramebufferOnly sets a Boolean value that determines whether the layer’s textures are used only for rendering.
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//
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// https://developer.apple.com/documentation/quartzcore/cametallayer/1478168-framebufferonly
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func (ml MetalLayer) SetFramebufferOnly(framebufferOnly bool) {
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switch framebufferOnly {
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case true:
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C.MetalLayer_SetFramebufferOnly(ml.metalLayer, 1)
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case false:
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C.MetalLayer_SetFramebufferOnly(ml.metalLayer, 0)
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}
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}
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// MetalDrawable is a displayable resource that can be rendered or written to by Metal.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametaldrawable.
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type MetalDrawable struct {
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metalDrawable unsafe.Pointer
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}
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// Drawable implements the mtl.Drawable interface.
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func (md MetalDrawable) Drawable() unsafe.Pointer { return md.metalDrawable }
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// Texture returns a Metal texture object representing the drawable object's content.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametaldrawable/1478159-texture.
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func (md MetalDrawable) Texture() mtl.Texture {
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return mtl.NewTexture(C.MetalDrawable_Texture(md.metalDrawable))
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}
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