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restorable: Reland: Do not record pixels if restoring is not requried

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This change also remove the restrictions of operations on
graphicscommand.Image. For example, now DrawTriangles and
ReplacePixels can be mixed on the same image.

Fixes #1022
This commit is contained in:
Hajime Hoshi 2020-08-15 15:11:56 +09:00
parent 257d747f7d
commit ed494dbf59
9 changed files with 64 additions and 47 deletions
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30
internal/graphicscommand/image.go
View File

@ -26,15 +26,6 @@ import (
"github.com/hajimehoshi/ebiten/v2/internal/png"
)
type lastCommand int
const (
lastCommandNone lastCommand = iota
lastCommandClear
lastCommandDrawTriangles
lastCommandReplacePixels
)
// Image represents an image that is implemented with OpenGL.
type Image struct {
image driver.Image
@ -51,8 +42,6 @@ type Image struct {
id int
bufferedRP []*driver.ReplacePixelsArgs
lastCommand lastCommand
}
var nextID = 1
@ -151,12 +140,6 @@ func (i *Image) InternalSize() (int, int) {
// If the source image is not specified, i.e., src is nil and there is no image in the uniform variables, the
// elements for the source image are not used.
func (i *Image) DrawTriangles(srcs [graphics.ShaderImageNum]*Image, offsets [graphics.ShaderImageNum - 1][2]float32, vertices []float32, indices []uint16, clr *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address, dstRegion, srcRegion driver.Region, shader *Shader, uniforms []interface{}) {
if i.lastCommand == lastCommandNone {
if !i.screen && mode != driver.CompositeModeClear {
panic("graphicscommand: the image must be cleared first")
}
}
if shader == nil {
// Fast path for rendering without a shader (#1355).
img := srcs[0]
@ -178,12 +161,6 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageNum]*Image, offsets [gra
i.resolveBufferedReplacePixels()
theCommandQueue.EnqueueDrawTrianglesCommand(i, srcs, offsets, vertices, indices, clr, mode, filter, address, dstRegion, srcRegion, shader, uniforms)
if i.lastCommand == lastCommandNone && !i.screen {
i.lastCommand = lastCommandClear
} else {
i.lastCommand = lastCommandDrawTriangles
}
}
// Sync syncs the texture data in CPU and GPU so that Pixels can return the texture data immediately.
@ -218,12 +195,6 @@ func (i *Image) Pixels() ([]byte, error) {
}
func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
// ReplacePixels for a part might invalidate the current image that are drawn by DrawTriangles (#593, #738).
if i.lastCommand == lastCommandDrawTriangles {
if x != 0 || y != 0 || i.width != width || i.height != height {
panic("graphicscommand: ReplacePixels for a part after DrawTriangles is forbidden")
}
}
i.bufferedRP = append(i.bufferedRP, &driver.ReplacePixelsArgs{
Pixels: pixels,
X: x,
@ -231,7 +202,6 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
Width: width,
Height: height,
})
i.lastCommand = lastCommandReplacePixels
}
func (i *Image) IsInvalidated() bool {

7
internal/graphicscommand/image_test.go
View File

@ -69,11 +69,6 @@ func TestClear(t *testing.T) {
}
func TestReplacePixelsPartAfterDrawTriangles(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("ReplacePixels must panic but not")
}
}()
const w, h = 32, 32
clr := NewImage(w, h)
src := NewImage(w/2, h/2)
@ -89,6 +84,8 @@ func TestReplacePixelsPartAfterDrawTriangles(t *testing.T) {
dst.DrawTriangles([graphics.ShaderImageNum]*Image{clr}, [graphics.ShaderImageNum - 1][2]float32{}, vs, is, nil, driver.CompositeModeClear, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, nil, nil)
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src}, [graphics.ShaderImageNum - 1][2]float32{}, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, nil, nil)
dst.ReplacePixels(make([]byte, 4), 0, 0, 1, 1)
// TODO: Check the result.
}
func TestShader(t *testing.T) {

8
internal/graphicsdriver/opengl/context_desktop.go
View File

@ -173,6 +173,14 @@ func (c *context) framebufferPixels(f *framebuffer, width, height int) []byte {
return pixels
}
func (c *context) framebufferPixelsToBuffer(f *framebuffer, buffer buffer, width, height int) {
gl.Flush()
c.bindFramebuffer(f.native)
gl.BindBuffer(gl.PIXEL_PACK_BUFFER, uint32(buffer))
gl.ReadPixels(0, 0, int32(width), int32(height), gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.BindBuffer(gl.PIXEL_PACK_BUFFER, 0)
}
func (c *context) activeTexture(idx int) {
gl.ActiveTexture(gl.TEXTURE0 + uint32(idx))
}

11
internal/graphicsdriver/opengl/context_js.go
View File

@ -219,6 +219,17 @@ func (c *context) framebufferPixels(f *framebuffer, width, height int) []byte {
return jsutil.Uint8ArrayToSlice(p)
}
func (c *context) framebufferPixelsToBuffer(f *framebuffer, buffer buffer, width, height int) {
c.ensureGL()
gl := c.gl
c.bindFramebuffer(f.native)
gl.Call("bindBuffer", gles.PIXEL_PACK_BUFFER, js.Value(buffer))
// void gl.readPixels(x, y, width, height, format, type, GLintptr offset);
gl.Call("readPixels", 0, 0, width, height, gles.RGBA, gles.UNSIGNED_BYTE, 0)
gl.Call("bindBuffer", gles.PIXEL_PACK_BUFFER, nil)
}
func (c *context) activeTexture(idx int) {
c.ensureGL()
gl := c.gl

10
internal/graphicsdriver/opengl/context_mobile.go
View File

@ -160,6 +160,16 @@ func (c *context) framebufferPixels(f *framebuffer, width, height int) []byte {
return pixels
}
func (c *context) framebufferPixelsToBuffer(f *framebuffer, buffer buffer, width, height int) {
c.ctx.Flush()
c.bindFramebuffer(f.native)
c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, uint32(buffer))
c.ctx.ReadPixels(nil, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE)
c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, 0)
}
func (c *context) activeTexture(idx int) {
c.ctx.ActiveTexture(uint32(gles.TEXTURE0 + idx))
}

1
internal/graphicsdriver/opengl/gl/package.go
View File

@ -21,6 +21,7 @@ const (
ELEMENT_ARRAY_BUFFER = 0x8893
DYNAMIC_DRAW = 0x88E8
STREAM_DRAW = 0x88E0
PIXEL_PACK_BUFFER = 0x88EB
PIXEL_UNPACK_BUFFER = 0x88EC
SHORT = 0x1402
FLOAT = 0x1406

1
internal/graphicsdriver/opengl/gles/const.go
View File

@ -22,6 +22,7 @@ const (
ELEMENT_ARRAY_BUFFER = 0x8893
DYNAMIC_DRAW = 0x88E8
STREAM_DRAW = 0x88E0
PIXEL_PACK_BUFFER = 0x88EB
PIXEL_UNPACK_BUFFER = 0x88EC
SHORT = 0x1402
FLOAT = 0x1406

6
internal/graphicsdriver/opengl/image.go
View File

@ -135,6 +135,12 @@ func (i *Image) ReplacePixels(args []*driver.ReplacePixelsArgs) {
if i.pbo.equal(*new(buffer)) {
i.pbo = i.graphics.context.newPixelBufferObject(w, h)
if i.pbo.equal(*new(buffer)) {
panic("opengl: newPixelBufferObject failed")
}
if i.framebuffer != nil {
i.graphics.context.framebufferPixelsToBuffer(i.framebuffer, i.pbo, i.width, i.height)
}
}
if i.pbo.equal(*new(buffer)) {
panic("opengl: newPixelBufferObject failed")

37
internal/restorable/image.go
View File

@ -170,19 +170,29 @@ func (i *Image) Extend(width, height int) *Image {
panic(fmt.Sprintf("restorable: the original size (%d, %d) cannot be extended to (%d, %d)", i.width, i.height, width, height))
}
if i.stale {
panic("restorable: Extend at a stale image is forbidden")
}
if len(i.drawTrianglesHistory) > 0 {
panic("restorable: Extend after DrawTriangles is forbidden")
}
newImg := NewImage(width, height)
newImg.SetVolatile(i.volatile)
i.basePixels.Apply(newImg.image)
// Use DrawTriangles instead of ReplacePixels because the image i might be stale and not have its pixels
// information.
srcs := [graphics.ShaderImageNum]*Image{i}
var offsets [graphics.ShaderImageNum - 1][2]float32
sw, sh := i.image.InternalSize()
vs := quadVertices(0, 0, float32(sw), float32(sh), 0, 0, float32(sw), float32(sh), 1, 1, 1, 1)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: float32(sw),
Height: float32(sh),
}
newImg.DrawTriangles(srcs, offsets, vs, is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, nil, nil)
// Overwrite the history as if the image newImg is created only by ReplacePixels. Now drawTrianglesHistory
// and basePixels cannot be mixed.
newImg.drawTrianglesHistory = nil
newImg.basePixels = i.basePixels
newImg.stale = i.stale
i.Dispose()
@ -287,6 +297,11 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
i.image.ReplacePixels(make([]byte, 4*width*height), x, y, width, height)
}
if !needsRestoring() || i.screen || i.volatile {
i.makeStale()
return
}
if x == 0 && y == 0 && width == w && height == h {
if pixels != nil {
i.basePixels.AddOrReplace(pixels, 0, 0, w, h)
@ -298,9 +313,7 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
return
}
// It looked like ReplacePixels on a part of image deletes other region that are rendered by DrawTriangles
// (#593, #758).
// drawTrianglesHistory and basePixels cannot be mixed.
if len(i.drawTrianglesHistory) > 0 {
panic("restorable: ReplacePixels for a part after DrawTriangles is forbidden")
}