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graphics: Add imageRestoringInfo

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This commit is contained in:
Hajime Hoshi 2016-07-14 02:35:20 +09:00
parent 2ba835373b
commit 3b8d5026c3
2 changed files with 174 additions and 102 deletions
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130
imageimpl.go
View File

@ -28,26 +28,16 @@ import (
"github.com/hajimehoshi/ebiten/internal/loop"
)
type drawImageHistoryItem struct {
image *Image
vertices []int16
geom GeoM
colorm ColorM
mode opengl.CompositeMode
}
type imageImpl struct {
image *graphics.Image
disposed bool
width int
height int
filter Filter
pixels []uint8
baseColor color.Color
drawImageHistory []*drawImageHistoryItem
volatile bool
screen bool
m sync.Mutex
image *graphics.Image
disposed bool
width int
height int
filter Filter
restoringInfo imageRestoringInfo
volatile bool
screen bool
m sync.Mutex
}
func newImageImpl(width, height int, filter Filter, volatile bool) (*imageImpl, error) {
@ -61,8 +51,9 @@ func newImageImpl(width, height int, filter Filter, volatile bool) (*imageImpl,
height: height,
filter: filter,
volatile: volatile,
pixels: make([]uint8, width*height*4),
}
i.restoringInfo.imageImpl = i
i.restoringInfo.resetWithPixels(make([]uint8, width*height*4))
runtime.SetFinalizer(i, (*imageImpl).Dispose)
return i, nil
}
@ -93,8 +84,9 @@ func newImageImplFromImage(source image.Image, filter Filter) (*imageImpl, error
width: w,
height: h,
filter: filter,
pixels: pixels,
}
i.restoringInfo.imageImpl = i
i.restoringInfo.resetWithPixels(pixels)
runtime.SetFinalizer(i, (*imageImpl).Dispose)
return i, nil
}
@ -110,8 +102,9 @@ func newScreenImageImpl(width, height int) (*imageImpl, error) {
height: height,
volatile: true,
screen: true,
pixels: make([]uint8, width*height*4),
}
i.restoringInfo.imageImpl = i
i.restoringInfo.resetWithPixels(make([]uint8, width*height*4))
runtime.SetFinalizer(i, (*imageImpl).Dispose)
return i, nil
}
@ -122,9 +115,7 @@ func (i *imageImpl) Fill(clr color.Color) error {
if i.disposed {
return errors.New("ebiten: image is already disposed")
}
i.pixels = nil
i.baseColor = clr
i.drawImageHistory = nil
i.restoringInfo.fill(clr)
return i.image.Fill(clr)
}
@ -137,9 +128,7 @@ func (i *imageImpl) clearIfVolatile() error {
if !i.volatile {
return nil
}
i.pixels = nil
i.baseColor = nil
i.drawImageHistory = nil
i.restoringInfo.clear()
return i.image.Fill(color.Transparent)
}
@ -181,7 +170,7 @@ func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error {
colorm: options.ColorM,
mode: opengl.CompositeMode(options.CompositeMode),
}
i.drawImageHistory = append(i.drawImageHistory, c)
i.restoringInfo.appendDrawImageHistory(c)
geom := &options.GeoM
colorm := &options.ColorM
mode := opengl.CompositeMode(options.CompositeMode)
@ -200,26 +189,11 @@ func (i *imageImpl) At(x, y int, context *opengl.Context) color.Color {
if i.disposed {
return color.Transparent
}
if i.pixels == nil || i.drawImageHistory != nil {
var err error
i.pixels, err = i.image.Pixels(context)
if err != nil {
panic(err)
}
i.drawImageHistory = nil
clr, err := i.restoringInfo.at(x, y, context)
if err != nil {
panic(err)
}
idx := 4*x + 4*y*i.width
r, g, b, a := i.pixels[idx], i.pixels[idx+1], i.pixels[idx+2], i.pixels[idx+3]
return color.RGBA{r, g, b, a}
}
func (i *imageImpl) hasHistoryWith(target *Image) bool {
for _, c := range i.drawImageHistory {
if c.image == target {
return true
}
}
return false
return clr
}
func (i *imageImpl) resetHistoryIfNeeded(target *Image, context *opengl.Context) error {
@ -228,26 +202,16 @@ func (i *imageImpl) resetHistoryIfNeeded(target *Image, context *opengl.Context)
if i.disposed {
return nil
}
if i.drawImageHistory == nil {
return nil
if err := i.restoringInfo.resetHistoryIfNeeded(target, context); err != nil {
return err
}
if !i.hasHistoryWith(target) {
return nil
}
var err error
i.pixels, err = i.image.Pixels(context)
if err != nil {
return nil
}
i.baseColor = nil
i.drawImageHistory = nil
return nil
}
func (i *imageImpl) hasHistory() bool {
i.m.Lock()
defer i.m.Unlock()
return i.drawImageHistory != nil
return i.restoringInfo.hasHistory()
}
func (i *imageImpl) restore(context *opengl.Context) error {
@ -274,42 +238,11 @@ func (i *imageImpl) restore(context *opengl.Context) error {
}
return nil
}
img := image.NewRGBA(image.Rect(0, 0, i.width, i.height))
if i.pixels != nil {
for j := 0; j < i.height; j++ {
copy(img.Pix[j*img.Stride:], i.pixels[j*i.width*4:(j+1)*i.width*4])
}
} else if i.baseColor != nil {
r32, g32, b32, a32 := i.baseColor.RGBA()
r, g, b, a := uint8(r32), uint8(g32), uint8(b32), uint8(a32)
for idx := 0; idx < len(img.Pix)/4; idx++ {
img.Pix[4*idx] = r
img.Pix[4*idx+1] = g
img.Pix[4*idx+2] = b
img.Pix[4*idx+3] = a
}
}
var err error
i.image, err = graphics.NewImageFromImage(img, glFilter(i.filter))
i.image, err = i.restoringInfo.restore(context)
if err != nil {
return err
}
for _, c := range i.drawImageHistory {
if c.image.impl.hasHistory() {
panic("not reach")
}
if err := i.image.DrawImage(c.image.impl.image, c.vertices, &c.geom, &c.colorm, c.mode); err != nil {
return err
}
}
if 0 < len(i.drawImageHistory) {
i.pixels, err = i.image.Pixels(context)
if err != nil {
return err
}
}
i.baseColor = nil
i.drawImageHistory = nil
return nil
}
@ -326,9 +259,7 @@ func (i *imageImpl) Dispose() error {
}
i.image = nil
i.disposed = true
i.pixels = nil
i.baseColor = nil
i.drawImageHistory = nil
i.restoringInfo.clear()
runtime.SetFinalizer(i, nil)
return nil
}
@ -339,12 +270,7 @@ func (i *imageImpl) ReplacePixels(p []uint8) error {
}
i.m.Lock()
defer i.m.Unlock()
if i.pixels == nil {
i.pixels = make([]uint8, i.width*i.height*4)
}
copy(i.pixels, p)
i.baseColor = nil
i.drawImageHistory = nil
i.restoringInfo.resetWithPixels(p)
if i.disposed {
return errors.New("ebiten: image is already disposed")
}

146
imagerestoringinfo.go Normal file
View File

@ -0,0 +1,146 @@
// Copyright 2016 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ebiten
import (
"image"
"image/color"
"github.com/hajimehoshi/ebiten/internal/graphics"
"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
)
type drawImageHistoryItem struct {
image *Image
vertices []int16
geom GeoM
colorm ColorM
mode opengl.CompositeMode
}
type imageRestoringInfo struct {
imageImpl *imageImpl
pixels []uint8
baseColor color.Color
drawImageHistory []*drawImageHistoryItem
}
func (i *imageRestoringInfo) resetWithPixels(pixels []uint8) {
if i.pixels == nil {
i.pixels = make([]uint8, len(pixels))
}
copy(i.pixels, pixels)
i.baseColor = nil
i.drawImageHistory = nil
}
func (i *imageRestoringInfo) clear() {
i.pixels = nil
i.baseColor = nil
i.drawImageHistory = nil
}
func (i *imageRestoringInfo) fill(clr color.Color) {
i.pixels = nil
i.baseColor = clr
i.drawImageHistory = nil
}
func (i *imageRestoringInfo) appendDrawImageHistory(item *drawImageHistoryItem) {
i.drawImageHistory = append(i.drawImageHistory, item)
}
func (i *imageRestoringInfo) at(x, y int, context *opengl.Context) (color.Color, error) {
if i.pixels == nil || i.drawImageHistory != nil {
var err error
i.pixels, err = i.imageImpl.image.Pixels(context)
if err != nil {
return nil, err
}
i.baseColor = nil
i.drawImageHistory = nil
}
idx := 4*x + 4*y*i.imageImpl.width
r, g, b, a := i.pixels[idx], i.pixels[idx+1], i.pixels[idx+2], i.pixels[idx+3]
return color.RGBA{r, g, b, a}, nil
}
func (i *imageRestoringInfo) hasHistoryWith(target *Image) bool {
for _, c := range i.drawImageHistory {
if c.image == target {
return true
}
}
return false
}
func (i *imageRestoringInfo) resetHistoryIfNeeded(target *Image, context *opengl.Context) error {
if i.drawImageHistory == nil {
return nil
}
if !i.hasHistoryWith(target) {
return nil
}
var err error
i.pixels, err = i.imageImpl.image.Pixels(context)
if err != nil {
return err
}
i.baseColor = nil
i.drawImageHistory = nil
return nil
}
func (i *imageRestoringInfo) hasHistory() bool {
return i.drawImageHistory != nil
}
func (i *imageRestoringInfo) restore(context *opengl.Context) (*graphics.Image, error) {
w, h := i.imageImpl.width, i.imageImpl.height
img := image.NewRGBA(image.Rect(0, 0, w, h))
if i.pixels != nil {
for j := 0; j < h; j++ {
copy(img.Pix[j*img.Stride:], i.pixels[j*w*4:(j+1)*w*4])
}
} else if i.baseColor != nil {
r32, g32, b32, a32 := i.baseColor.RGBA()
r, g, b, a := uint8(r32), uint8(g32), uint8(b32), uint8(a32)
for idx := 0; idx < len(img.Pix)/4; idx++ {
img.Pix[4*idx] = r
img.Pix[4*idx+1] = g
img.Pix[4*idx+2] = b
img.Pix[4*idx+3] = a
}
}
gimg, err := graphics.NewImageFromImage(img, glFilter(i.imageImpl.filter))
if err != nil {
return nil, err
}
for _, c := range i.drawImageHistory {
if c.image.impl.hasHistory() {
panic("not reach")
}
if err := gimg.DrawImage(c.image.impl.image, c.vertices, &c.geom, &c.colorm, c.mode); err != nil {
return nil, err
}
}
i.pixels, err = gimg.Pixels(context)
if err != nil {
return nil, err
}
i.baseColor = nil
i.drawImageHistory = nil
return gimg, nil
}