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graphicsdriver/opengl: Refactoring

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This commit is contained in:
Hajime Hoshi 2019-11-20 12:23:45 +09:00
parent 52f6be2639
commit 161771cc99
1 changed files with 8 additions and 9 deletions
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17
internal/graphicsdriver/opengl/pbo_desktop.go
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@ -21,7 +21,6 @@ package opengl
import (
"reflect"
"runtime"
"unsafe"
"github.com/hajimehoshi/ebiten/internal/graphics"
@ -32,13 +31,14 @@ const canUsePBO = true
type pboState struct {
image *Image
mappedPBO unsafe.Pointer
mapped []byte
}
var thePBOState pboState
func (s *pboState) mapPBO(img *Image) {
if img.pbo == *new(buffer) {
w, h := graphics.InternalImageSize(img.width), graphics.InternalImageSize(img.height)
if img.pbo == *new(buffer) {
img.pbo = img.driver.context.newPixelBufferObject(w, h)
}
s.image = img
@ -47,24 +47,22 @@ func (s *pboState) mapPBO(img *Image) {
if s.mappedPBO == nil {
panic("opengl: mapPixelBuffer failed")
}
}
func (s *pboState) draw(pix []byte, x, y, width, height int) {
w, h := graphics.InternalImageSize(s.image.width), graphics.InternalImageSize(s.image.height)
var mapped []byte
sh := (*reflect.SliceHeader)(unsafe.Pointer(&mapped))
sh.Data = uintptr(s.mappedPBO)
sh.Len = 4 * w * h
sh.Cap = 4 * w * h
s.mapped = mapped
}
func (s *pboState) draw(pix []byte, x, y, width, height int) {
w := graphics.InternalImageSize(s.image.width)
stride := 4 * w
offset := 4 * (y*w + x)
for j := 0; j < height; j++ {
copy(mapped[offset+stride*j:offset+stride*j+4*width], pix[4*width*j:4*width*(j+1)])
copy(s.mapped[offset+stride*j:offset+stride*j+4*width], pix[4*width*j:4*width*(j+1)])
}
runtime.KeepAlive(mapped)
}
func (s *pboState) unmapPBO() {
@ -74,4 +72,5 @@ func (s *pboState) unmapPBO() {
s.image = nil
s.mappedPBO = nil
s.mapped = nil
}