forked from gioui/gio
/
vulkan.go
218 lines (198 loc) · 5.14 KB
/
vulkan.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
// SPDX-License-Identifier: Unlicense OR MIT
//go:build (linux || freebsd) && !novulkan
// +build linux freebsd
// +build !novulkan
package app
import (
"errors"
"unsafe"
"gioui.org/gpu"
"github.com/MTGArenaChat/gio/internal/vk"
)
type vkContext struct {
physDev vk.PhysicalDevice
inst vk.Instance
dev vk.Device
queueFam int
queue vk.Queue
acquireSem vk.Semaphore
presentSem vk.Semaphore
fence vk.Fence
swchain vk.Swapchain
imgs []vk.Image
views []vk.ImageView
fbos []vk.Framebuffer
format vk.Format
presentIdx int
}
func newVulkanContext(inst vk.Instance, surf vk.Surface) (*vkContext, error) {
physDev, qFam, err := vk.ChoosePhysicalDevice(inst, surf)
if err != nil {
return nil, err
}
dev, err := vk.CreateDeviceAndQueue(physDev, qFam, "VK_KHR_swapchain")
if err != nil {
return nil, err
}
acquireSem, err := vk.CreateSemaphore(dev)
if err != nil {
vk.DestroyDevice(dev)
return nil, err
}
presentSem, err := vk.CreateSemaphore(dev)
if err != nil {
vk.DestroySemaphore(dev, acquireSem)
vk.DestroyDevice(dev)
return nil, err
}
fence, err := vk.CreateFence(dev, vk.FENCE_CREATE_SIGNALED_BIT)
if err != nil {
vk.DestroySemaphore(dev, presentSem)
vk.DestroySemaphore(dev, acquireSem)
vk.DestroyDevice(dev)
return nil, err
}
c := &vkContext{
physDev: physDev,
inst: inst,
dev: dev,
queueFam: qFam,
queue: vk.GetDeviceQueue(dev, qFam, 0),
acquireSem: acquireSem,
presentSem: presentSem,
fence: fence,
}
return c, nil
}
func (c *vkContext) RenderTarget() (gpu.RenderTarget, error) {
vk.WaitForFences(c.dev, c.fence)
vk.ResetFences(c.dev, c.fence)
imgIdx, err := vk.AcquireNextImage(c.dev, c.swchain, c.acquireSem, 0)
if err := mapSurfaceErr(err); err != nil {
return nil, err
}
c.presentIdx = imgIdx
return gpu.VulkanRenderTarget{
WaitSem: uint64(c.acquireSem),
SignalSem: uint64(c.presentSem),
Fence: uint64(c.fence),
Framebuffer: uint64(c.fbos[imgIdx]),
Image: uint64(c.imgs[imgIdx]),
}, nil
}
func (c *vkContext) api() gpu.API {
return gpu.Vulkan{
PhysDevice: unsafe.Pointer(c.physDev),
Device: unsafe.Pointer(c.dev),
Format: int(c.format),
QueueFamily: c.queueFam,
QueueIndex: 0,
}
}
func mapErr(err error) error {
var vkErr vk.Error
if errors.As(err, &vkErr) && vkErr == vk.ERROR_DEVICE_LOST {
return gpu.ErrDeviceLost
}
return err
}
func mapSurfaceErr(err error) error {
var vkErr vk.Error
if !errors.As(err, &vkErr) {
return err
}
switch {
case vkErr == vk.SUBOPTIMAL_KHR:
// Android reports VK_SUBOPTIMAL_KHR when presenting to a rotated
// swapchain (preTransform != currentTransform). However, we don't
// support transforming the output ourselves, so we'll live with it.
return nil
case vkErr == vk.ERROR_OUT_OF_DATE_KHR:
return errOutOfDate
case vkErr == vk.ERROR_SURFACE_LOST_KHR:
// Treating a lost surface as a lost device isn't accurate, but
// probably not worth optimizing.
return gpu.ErrDeviceLost
}
return mapErr(err)
}
func (c *vkContext) release() {
vk.DeviceWaitIdle(c.dev)
c.destroySwapchain()
vk.DestroyFence(c.dev, c.fence)
vk.DestroySemaphore(c.dev, c.acquireSem)
vk.DestroySemaphore(c.dev, c.presentSem)
vk.DestroyDevice(c.dev)
*c = vkContext{}
}
func (c *vkContext) present() error {
return mapSurfaceErr(vk.PresentQueue(c.queue, c.swchain, c.presentSem, c.presentIdx))
}
func (c *vkContext) destroyImageViews() {
for _, f := range c.fbos {
vk.DestroyFramebuffer(c.dev, f)
}
c.fbos = nil
for _, view := range c.views {
vk.DestroyImageView(c.dev, view)
}
c.views = nil
}
func (c *vkContext) destroySwapchain() {
vk.DeviceWaitIdle(c.dev)
c.destroyImageViews()
if c.swchain != 0 {
vk.DestroySwapchain(c.dev, c.swchain)
c.swchain = 0
}
}
func (c *vkContext) refresh(surf vk.Surface, width, height int) error {
vk.DeviceWaitIdle(c.dev)
c.destroyImageViews()
// Check whether size is valid. That's needed on X11, where ConfigureNotify
// is not always synchronized with the window extent.
caps, err := vk.GetPhysicalDeviceSurfaceCapabilities(c.physDev, surf)
if err != nil {
return err
}
minExt, maxExt := caps.MinExtent(), caps.MaxExtent()
if width < minExt.X || maxExt.X < width || height < minExt.Y || maxExt.Y < height {
return errOutOfDate
}
swchain, imgs, format, err := vk.CreateSwapchain(c.physDev, c.dev, surf, width, height, c.swchain)
if c.swchain != 0 {
vk.DestroySwapchain(c.dev, c.swchain)
c.swchain = 0
}
if err := mapSurfaceErr(err); err != nil {
return err
}
c.swchain = swchain
c.imgs = imgs
c.format = format
pass, err := vk.CreateRenderPass(
c.dev,
format,
vk.ATTACHMENT_LOAD_OP_CLEAR,
vk.IMAGE_LAYOUT_UNDEFINED,
vk.IMAGE_LAYOUT_PRESENT_SRC_KHR,
nil,
)
if err := mapErr(err); err != nil {
return err
}
defer vk.DestroyRenderPass(c.dev, pass)
for _, img := range imgs {
view, err := vk.CreateImageView(c.dev, img, format)
if err := mapErr(err); err != nil {
return err
}
c.views = append(c.views, view)
fbo, err := vk.CreateFramebuffer(c.dev, pass, view, width, height)
if err := mapErr(err); err != nil {
return err
}
c.fbos = append(c.fbos, fbo)
}
return nil
}