/
main.go
271 lines (212 loc) · 6.93 KB
/
main.go
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package main
import (
"flag"
"fmt"
"github.com/JacksCancer/go-opencl/cl"
"image"
_ "image/gif"
"image/jpeg"
"image/png"
"io/ioutil"
"os"
"path"
)
func listPlatforms(platforms []*cl.Platform) {
for _, p := range platforms {
const indent = " "
fmt.Println("Platform: ", p.Name())
fmt.Println(indent, "Vendor: ", p.Vendor())
fmt.Println(indent, "Profile: ", p.Profile())
fmt.Println(indent, "Version: ", p.Version())
fmt.Println(indent, "Extensions: ", p.Extensions())
const indent2 = indent + indent
devices, err := p.GetDevices(cl.DeviceTypeAll)
checkFatalError(err)
for _, d := range devices {
fmt.Println(indent, "Device: ", d.Name())
fmt.Println(indent2, "Vendor: ", d.Vendor())
fmt.Println(indent2, "Type: ", d.Type())
fmt.Println(indent2, "Profile: ", d.Profile())
fmt.Println(indent2, "Version: ", d.Version())
fmt.Println(indent2, "OpenCL: ", d.OpenCLCVersion())
fmt.Println(indent2, "Extensions: ", d.Extensions())
fmt.Println(indent2, "Driver Ver: ", d.DriverVersion())
fmt.Println(indent2, "Global Mem: ", d.GlobalMemSize())
fmt.Println(indent2, "Cache Line: ", d.GlobalMemCachelineSize())
fmt.Println(indent2, "Cache Type: ", d.GlobalMemCacheType())
fmt.Println(indent2, "Unified: ", d.HostUnifiedMemory())
fmt.Println(indent2, "Local Mem: ", d.LocalMemSize())
fmt.Println(indent2, "Local Type: ", d.LocalMemType())
fmt.Println(indent2, "Units: ", d.MaxComputeUnits())
fmt.Println(indent2, "Group Size: ", d.MaxWorkGroupSize())
fmt.Println(indent2, "Item Size: ", d.MaxWorkItemSizes())
fmt.Println(indent2, "Item Dim: ", d.MaxWorkItemDimensions())
fmt.Println(indent2, "Img Width: ", d.Image2DMaxWidth())
fmt.Println(indent2, "Img Height: ", d.Image2DMaxHeight())
}
}
}
func chooseDevice(platform *cl.Platform, devtype cl.DeviceType) *cl.Device {
devices, err := platform.GetDevices(cl.DeviceTypeAll)
checkFatalError(err)
for _, dev := range devices {
if dev.Type()&devtype != 0 {
return dev
}
}
return devices[0]
}
func createContext(platform *cl.Platform, dev *cl.Device) *cl.Context {
ctx, err := cl.CreateContext([]*cl.Device{dev})
if err != nil {
panic(err)
}
return ctx
}
func buildProgram(c *cl.Context, dev *cl.Device, filename string) *cl.Program {
data, err := ioutil.ReadFile(filename)
checkFatalError(err)
program, err := c.CreateProgramWithSource([]string{string(data)})
checkFatalError(err)
err = program.BuildProgram([]*cl.Device{dev}, "")
if err != nil {
fmt.Println(err)
panic("Build Error")
}
return program
}
func findImageEdges(c *cl.Context, dev *cl.Device, queue *cl.CommandQueue, src image.Image) (image.Image, *cl.Event) {
width := src.Bounds().Dx()
height := src.Bounds().Dy()
srcTex, err := c.CreateImage2DFromImage(cl.MemUseHostPtr|cl.MemReadOnly, src)
checkFatalError(err)
dstTex, err := c.CreateImageSimple(cl.MemWriteOnly, width, height, cl.ChannelOrderRGBA, cl.ChannelDataTypeUNormInt8, nil)
checkFatalError(err)
// program, err := c.NewProgramFromFile("optlens.cl")
// checkFatalError(err)
program := buildProgram(c, dev, "edgedetect.cl")
kernel, err := program.CreateKernel("edgeDetect")
checkFatalError(err)
err = kernel.SetArg(0, srcTex)
checkFatalError(err)
err = kernel.SetArg(1, dstTex)
checkFatalError(err)
// err = kernel.SetArg(2, int32(2))
// checkFatalError(err)
const edgeSize = 1
kev, err := queue.EnqueueNDRangeKernel(kernel, []int{edgeSize, edgeSize}, []int{width - 2*edgeSize, height - 2*edgeSize}, nil, nil)
checkFatalError(err)
dst := image.NewRGBA(src.Bounds())
_, err = queue.EnqueueReadImage(dstTex, true, [3]int{0, 0, 0}, [3]int{width, height, 1}, 0, 0, dst.Pix, nil)
checkFatalError(err)
return dst, kev
}
func createBufferFromImage(c *cl.Context, src image.Image) (*cl.MemObject, error) {
switch m := src.(type) {
case *image.RGBA:
return c.CreateBuffer(cl.MemUseHostPtr|cl.MemReadOnly, m.Pix)
case *image.Gray:
return c.CreateBuffer(cl.MemUseHostPtr|cl.MemReadOnly, m.Pix)
}
return nil, fmt.Errorf("image type not supported yet")
}
func findBufferEdges(c *cl.Context, dev *cl.Device, queue *cl.CommandQueue, src image.Image) (image.Image, *cl.Event) {
width := src.Bounds().Dx()
height := src.Bounds().Dy()
srcBuf, err := createBufferFromImage(c, src)
checkFatalError(err)
size := width * height * 4 * 4
dstBuf, err := c.CreateEmptyBuffer(cl.MemWriteOnly, size)
checkFatalError(err)
program := buildProgram(c, dev, "edgedetect.cl")
kernel, err := program.CreateKernel("bufferEdgeDetect")
checkFatalError(err)
err = kernel.SetArg(0, srcBuf)
checkFatalError(err)
err = kernel.SetArg(1, dstBuf)
checkFatalError(err)
err = kernel.SetArg(2, int32(width))
checkFatalError(err)
const edgeSize = 1
kev, err := queue.EnqueueNDRangeKernel(kernel, []int{edgeSize, edgeSize}, []int{width - 2*edgeSize, height - 2*edgeSize}, nil, nil)
checkFatalError(err)
dst := image.NewRGBA(src.Bounds())
_, err = queue.EnqueueReadBufferUint8(dstBuf, true, 0, dst.Pix, nil)
checkFatalError(err)
return dst, kev
}
func findEdges(src image.Image, devtype cl.DeviceType, useBuffer bool) image.Image {
platforms, err := cl.GetPlatforms()
checkFatalError(err)
listPlatforms(platforms)
platform := platforms[0]
dev := chooseDevice(platform, devtype)
c := createContext(platform, dev)
queue, err := c.CreateCommandQueue(dev, cl.CommandQueueProfilingEnable)
checkFatalError(err)
var (
kev *cl.Event
dst image.Image
)
if dev.ImageSupport() && !useBuffer {
dst, kev = findImageEdges(c, dev, queue, src)
} else {
if !useBuffer {
fmt.Printf("No image support on device %v\n", dev.Name())
}
dst, kev = findBufferEdges(c, dev, queue, src)
}
start, err := kev.GetEventProfilingInfo(cl.ProfilingInfoCommandStart)
checkFatalError(err)
end, err := kev.GetEventProfilingInfo(cl.ProfilingInfoCommandEnd)
checkFatalError(err)
fmt.Printf("time: %vms, (res: %v)\n", float64(end-start)/1000000., dev.ProfilingTimerResolution())
return dst
}
func checkError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func checkFatalError(err error) {
if err != nil {
panic(err)
}
}
func main() {
var (
srcFile string
dstFile string
useGpu bool
useBuffer bool
)
flag.StringVar(&srcFile, "src", "", "source image")
flag.StringVar(&dstFile, "dst", "out.png", "destination image")
flag.BoolVar(&useGpu, "gpu", false, "use gpu")
flag.BoolVar(&useBuffer, "buffer", false, "use buffer instead of images")
flag.Parse()
if len(srcFile) == 0 {
flag.PrintDefaults()
os.Exit(1)
}
src, err := os.Open(srcFile)
checkError(err)
dst, err := os.Create(dstFile)
checkError(err)
srcImg, _, err := image.Decode(src)
checkError(err)
devType := cl.DeviceTypeCPU
if useGpu {
devType = cl.DeviceTypeGPU
}
dstImg := findEdges(srcImg, devType, useBuffer)
switch path.Ext(dstFile) {
case "jpeg":
err = jpeg.Encode(dst, dstImg, nil)
checkFatalError(err)
default:
err = png.Encode(dst, dstImg)
checkFatalError(err)
}
}