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restorable: Rename variables
This commit is contained in:
Hajime Hoshi
parent
ccddf3c4ac
commit
f16b5d9c10
@ -127,84 +127,84 @@ func NewScreenFramebufferImage(width, height int, offsetX, offsetY float64) *Ima
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}
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// BasePixelsForTesting returns the image's basePixels for testing.
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func (p *Image) BasePixelsForTesting() []uint8 {
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return p.basePixels
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func (i *Image) BasePixelsForTesting() []uint8 {
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return i.basePixels
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}
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// Size returns the image's size.
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func (p *Image) Size() (int, int) {
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return p.image.Size()
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func (i *Image) Size() (int, int) {
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return i.image.Size()
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}
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// makeStale makes the image stale.
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func (p *Image) makeStale() {
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p.basePixels = nil
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = true
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func (i *Image) makeStale() {
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i.basePixels = nil
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = true
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}
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// clearIfVolatile clears the image if the image is volatile.
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func (p *Image) clearIfVolatile() {
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if !p.volatile {
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func (i *Image) clearIfVolatile() {
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if !i.volatile {
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return
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}
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p.basePixels = nil
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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if p.image == nil {
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i.basePixels = nil
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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if i.image == nil {
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panic("not reached")
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}
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p.image.Fill(0, 0, 0, 0)
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i.image.Fill(0, 0, 0, 0)
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}
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// Fill fills the image with the given color.
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func (p *Image) Fill(r, g, b, a uint8) {
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theImages.makeStaleIfDependingOn(p)
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p.basePixels = nil
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p.baseColor = color.RGBA{r, g, b, a}
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p.drawImageHistory = nil
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p.stale = false
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p.image.Fill(r, g, b, a)
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func (i *Image) Fill(r, g, b, a uint8) {
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theImages.makeStaleIfDependingOn(i)
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i.basePixels = nil
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i.baseColor = color.RGBA{r, g, b, a}
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i.drawImageHistory = nil
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i.stale = false
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i.image.Fill(r, g, b, a)
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}
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// ReplacePixels replaces the image pixels with the given pixels slice.
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func (p *Image) ReplacePixels(pixels []uint8) {
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theImages.makeStaleIfDependingOn(p)
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p.image.ReplacePixels(pixels)
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p.basePixels = pixels
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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func (i *Image) ReplacePixels(pixels []uint8) {
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theImages.makeStaleIfDependingOn(i)
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i.image.ReplacePixels(pixels)
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i.basePixels = pixels
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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}
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// DrawImage draws a given image img to the image.
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func (p *Image) DrawImage(img *Image, vertices []float32, colorm *affine.ColorM, mode opengl.CompositeMode) {
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theImages.makeStaleIfDependingOn(p)
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func (i *Image) DrawImage(img *Image, vertices []float32, colorm *affine.ColorM, mode opengl.CompositeMode) {
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theImages.makeStaleIfDependingOn(i)
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if img.stale || img.volatile || !IsRestoringEnabled() {
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p.makeStale()
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i.makeStale()
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} else {
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p.appendDrawImageHistory(img, vertices, colorm, mode)
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i.appendDrawImageHistory(img, vertices, colorm, mode)
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}
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p.image.DrawImage(img.image, vertices, colorm, mode)
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i.image.DrawImage(img.image, vertices, colorm, mode)
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}
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// appendDrawImageHistory appends a draw-image history item to the image.
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func (p *Image) appendDrawImageHistory(image *Image, vertices []float32, colorm *affine.ColorM, mode opengl.CompositeMode) {
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if p.stale || p.volatile {
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func (i *Image) appendDrawImageHistory(image *Image, vertices []float32, colorm *affine.ColorM, mode opengl.CompositeMode) {
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if i.stale || i.volatile {
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return
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}
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if len(p.drawImageHistory) > 0 {
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last := p.drawImageHistory[len(p.drawImageHistory)-1]
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if len(i.drawImageHistory) > 0 {
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last := i.drawImageHistory[len(i.drawImageHistory)-1]
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if last.canMerge(image, colorm, mode) {
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last.vertices = append(last.vertices, vertices...)
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return
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}
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}
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const maxDrawImageHistoryNum = 100
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if len(p.drawImageHistory)+1 > maxDrawImageHistoryNum {
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p.makeStale()
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if len(i.drawImageHistory)+1 > maxDrawImageHistoryNum {
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i.makeStale()
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return
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}
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// All images must be resolved and not stale each after frame.
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@ -215,68 +215,68 @@ func (p *Image) appendDrawImageHistory(image *Image, vertices []float32, colorm
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colorm: *colorm,
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mode: mode,
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}
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p.drawImageHistory = append(p.drawImageHistory, item)
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i.drawImageHistory = append(i.drawImageHistory, item)
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}
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// At returns a color value at (x, y).
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//
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// Note that this must not be called until context is available.
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func (p *Image) At(x, y int) (color.RGBA, error) {
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w, h := p.image.Size()
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func (i *Image) At(x, y int) (color.RGBA, error) {
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w, h := i.image.Size()
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w2, h2 := math.NextPowerOf2Int(w), math.NextPowerOf2Int(h)
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if x < 0 || y < 0 || w2 <= x || h2 <= y {
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return color.RGBA{}, nil
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}
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if p.basePixels == nil || p.drawImageHistory != nil || p.stale {
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if err := p.readPixelsFromGPU(p.image); err != nil {
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if i.basePixels == nil || i.drawImageHistory != nil || i.stale {
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if err := i.readPixelsFromGPU(i.image); err != nil {
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return color.RGBA{}, err
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}
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}
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idx := 4*x + 4*y*w2
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r, g, b, a := p.basePixels[idx], p.basePixels[idx+1], p.basePixels[idx+2], p.basePixels[idx+3]
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r, g, b, a := i.basePixels[idx], i.basePixels[idx+1], i.basePixels[idx+2], i.basePixels[idx+3]
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return color.RGBA{r, g, b, a}, nil
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}
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// makeStaleIfDependingOn makes the image stale if the image depends on target.
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func (p *Image) makeStaleIfDependingOn(target *Image) {
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if p.stale {
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func (i *Image) makeStaleIfDependingOn(target *Image) {
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if i.stale {
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return
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}
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if p.dependsOn(target) {
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p.makeStale()
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if i.dependsOn(target) {
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i.makeStale()
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}
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}
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// readPixelsFromGPU reads the pixels from GPU and resolves the image's 'stale' state.
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func (p *Image) readPixelsFromGPU(image *graphics.Image) error {
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func (i *Image) readPixelsFromGPU(image *graphics.Image) error {
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var err error
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p.basePixels, err = image.Pixels()
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i.basePixels, err = image.Pixels()
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if err != nil {
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return err
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}
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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return nil
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}
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// resolveStale resolves the image's 'stale' state.
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func (p *Image) resolveStale() error {
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func (i *Image) resolveStale() error {
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if !IsRestoringEnabled() {
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return nil
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}
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if p.volatile {
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if i.volatile {
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return nil
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}
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if !p.stale {
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if !i.stale {
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return nil
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}
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return p.readPixelsFromGPU(p.image)
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return i.readPixelsFromGPU(i.image)
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}
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// dependsOn returns a boolean value indicating whether the image depends on target.
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func (p *Image) dependsOn(target *Image) bool {
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for _, c := range p.drawImageHistory {
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func (i *Image) dependsOn(target *Image) bool {
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for _, c := range i.drawImageHistory {
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if c.image == target {
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return true
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}
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@ -285,100 +285,100 @@ func (p *Image) dependsOn(target *Image) bool {
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}
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// dependingImages returns all images that is depended by the image.
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func (p *Image) dependingImages() map[*Image]struct{} {
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func (i *Image) dependingImages() map[*Image]struct{} {
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r := map[*Image]struct{}{}
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for _, c := range p.drawImageHistory {
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for _, c := range i.drawImageHistory {
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r[c.image] = struct{}{}
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}
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return r
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}
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// hasDependency returns a boolean value indicating whether the image depends on another image.
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func (p *Image) hasDependency() bool {
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if p.stale {
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func (i *Image) hasDependency() bool {
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if i.stale {
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return false
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}
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return len(p.drawImageHistory) > 0
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return len(i.drawImageHistory) > 0
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}
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// Restore restores *graphics.Image from the pixels using its state.
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func (p *Image) restore() error {
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w, h := p.image.Size()
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if p.screen {
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func (i *Image) restore() error {
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w, h := i.image.Size()
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if i.screen {
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// The screen image should also be recreated because framebuffer might
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// be changed.
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p.image = graphics.NewScreenFramebufferImage(w, h, p.offsetX, p.offsetY)
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p.basePixels = nil
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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i.image = graphics.NewScreenFramebufferImage(w, h, i.offsetX, i.offsetY)
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i.basePixels = nil
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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return nil
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}
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if p.volatile {
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p.image = graphics.NewImage(w, h, p.filter)
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p.basePixels = nil
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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if i.volatile {
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i.image = graphics.NewImage(w, h, i.filter)
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i.basePixels = nil
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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return nil
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}
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if p.stale {
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if i.stale {
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// TODO: panic here?
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return errors.New("restorable: pixels must not be stale when restoring")
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}
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w2, h2 := math.NextPowerOf2Int(w), math.NextPowerOf2Int(h)
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img := image.NewRGBA(image.Rect(0, 0, w2, h2))
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if p.basePixels != nil {
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if i.basePixels != nil {
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for j := 0; j < h; j++ {
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copy(img.Pix[j*img.Stride:], p.basePixels[j*w2*4:(j+1)*w2*4])
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copy(img.Pix[j*img.Stride:], i.basePixels[j*w2*4:(j+1)*w2*4])
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}
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}
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gimg := graphics.NewImageFromImage(img, w, h, p.filter)
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if p.baseColor != (color.RGBA{}) {
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if p.basePixels != nil {
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gimg := graphics.NewImageFromImage(img, w, h, i.filter)
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if i.baseColor != (color.RGBA{}) {
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if i.basePixels != nil {
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panic("not reached")
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}
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gimg.Fill(p.baseColor.R, p.baseColor.G, p.baseColor.B, p.baseColor.A)
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gimg.Fill(i.baseColor.R, i.baseColor.G, i.baseColor.B, i.baseColor.A)
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}
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for _, c := range p.drawImageHistory {
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for _, c := range i.drawImageHistory {
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// All dependencies must be already resolved.
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if c.image.hasDependency() {
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panic("not reached")
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}
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gimg.DrawImage(c.image.image, c.vertices, &c.colorm, c.mode)
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}
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p.image = gimg
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i.image = gimg
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var err error
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p.basePixels, err = gimg.Pixels()
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i.basePixels, err = gimg.Pixels()
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if err != nil {
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return err
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}
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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return nil
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}
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// Dispose disposes the image.
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//
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// After disposing, calling the funciton of the image causes unexpected results.
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func (p *Image) Dispose() {
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theImages.makeStaleIfDependingOn(p)
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p.image.Dispose()
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p.image = nil
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p.basePixels = nil
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p.baseColor = color.RGBA{}
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p.drawImageHistory = nil
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p.stale = false
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theImages.remove(p)
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runtime.SetFinalizer(p, nil)
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func (i *Image) Dispose() {
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theImages.makeStaleIfDependingOn(i)
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i.image.Dispose()
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i.image = nil
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i.basePixels = nil
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i.baseColor = color.RGBA{}
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i.drawImageHistory = nil
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i.stale = false
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theImages.remove(i)
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runtime.SetFinalizer(i, nil)
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}
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// IsInvalidated returns a boolean value indicating whether the image is invalidated.
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//
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// If an image is invalidated, GL context is lost and all the images should be restored asap.
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func (p *Image) IsInvalidated() (bool, error) {
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func (i *Image) IsInvalidated() (bool, error) {
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// FlushCommands is required because c.offscreen.impl might not have an actual texture.
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if err := graphics.FlushCommands(); err != nil {
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return false, err
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@ -387,5 +387,5 @@ func (p *Image) IsInvalidated() (bool, error) {
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if !IsRestoringEnabled() {
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return false, nil
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}
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return p.image.IsInvalidated(), nil
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return i.image.IsInvalidated(), nil
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}
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