forked from joejulian/gio
Elias Naur
7d84e419c9
Both the OpenGL and the Direct3D API are stateful and gpu.GPU renders to the render target current when Frame is called. Modern GPU API such as Metal don't have a concept of a current render target, and the target even changes each frame. Add RenderTarget and add an explicit target argument to GPU.Frame as well as the underlying driver.Device.BeginFrame. Signed-off-by: Elias Naur <mail@eliasnaur.com>
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package driver
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import (
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"fmt"
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"unsafe"
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"gioui.org/internal/gl"
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)
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// See gpu/api.go for documentation for the API types.
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type API interface {
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implementsAPI()
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}
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type RenderTarget interface {
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ImplementsRenderTarget()
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}
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type OpenGLRenderTarget gl.Framebuffer
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type Direct3D11RenderTarget struct {
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// RenderTarget is a *ID3D11RenderTargetView.
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RenderTarget unsafe.Pointer
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// DepthStencilView is a *ID3D11DepthStencilView.
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DepthStencilView unsafe.Pointer
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}
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type OpenGL struct {
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// ES forces the use of ANGLE OpenGL ES libraries on macOS. It is
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// ignored on all other platforms.
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ES bool
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// Context contains the WebGL context for WebAssembly platforms. It is
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// empty for all other platforms; an OpenGL context is assumed current when
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// calling NewDevice.
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Context gl.Context
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}
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type Direct3D11 struct {
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// Device contains a *ID3D11Device.
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Device unsafe.Pointer
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}
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// API specific device constructors.
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var (
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NewOpenGLDevice func(api OpenGL) (Device, error)
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NewDirect3D11Device func(api Direct3D11) (Device, error)
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)
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// NewDevice creates a new Device given the api.
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//
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// Note that the device does not assume ownership of the resources contained in
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// api; the caller must ensure the resources are valid until the device is
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// released.
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func NewDevice(api API) (Device, error) {
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switch api := api.(type) {
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case OpenGL:
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if NewOpenGLDevice != nil {
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return NewOpenGLDevice(api)
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}
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case Direct3D11:
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if NewDirect3D11Device != nil {
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return NewDirect3D11Device(api)
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}
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}
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return nil, fmt.Errorf("driver: no driver available for the API %T", api)
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}
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func (OpenGL) implementsAPI() {}
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func (Direct3D11) implementsAPI() {}
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func (OpenGLRenderTarget) ImplementsRenderTarget() {}
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func (Direct3D11RenderTarget) ImplementsRenderTarget() {}
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