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ebiten: Allow SubImage at DrawTriangles

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This commit is contained in:
Hajime Hoshi 2020-09-20 04:21:38 +09:00
parent 41564533f9
commit 0db7dc22b2
2 changed files with 92 additions and 26 deletions
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28
image.go
View File

@ -420,10 +420,6 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
options = &DrawTrianglesOptions{}
}
if options.Shader != nil && img != nil && img.isSubImage() {
panic("ebiten: rendering a sub-image with a shader is not implemented (DrawTriangles)")
}
mode := driver.CompositeMode(options.CompositeMode)
filter := driver.FilterNearest
@ -450,7 +446,11 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
copy(is, indices)
var sr driver.Region
b := img.Bounds()
var b image.Rectangle
if img != nil {
b = img.Bounds()
}
// Pass the source region only when the shader is used, since this affects the condition of merging graphics
// commands (#1293).
if options.Shader != nil || options.Address != AddressUnsafe {
@ -463,11 +463,17 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
}
var srcs [graphics.ShaderImageNum]*mipmap.Mipmap
var imgw, imgh int
var sx, sy float32
if img != nil {
srcs[0] = img.mipmap
imgw, imgh = img.Size()
sx = float32(b.Min.X)
sy = float32(b.Min.Y)
}
var offsets [graphics.ShaderImageNum - 1][2]float32
for i, img := range options.Images {
if img == nil {
continue
@ -475,23 +481,23 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
if img.isDisposed() {
panic("ebiten: the given image to DrawTriangles must not be disposed")
}
if img.isSubImage() {
// TODO: Implement this.
panic("ebiten: rendering a sub-image is not implemented (DrawTriangles)")
}
if w, h := img.Size(); imgw != w || imgh != h {
panic("ebiten: all the source images must be the same size")
}
srcs[i+1] = img.mipmap
b := img.Bounds()
offsets[i][0] = -sx + float32(b.Min.X)
offsets[i][1] = -sy + float32(b.Min.Y)
}
if options.Shader == nil {
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.Address(options.Address), sr, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.Address(options.Address), sr, offsets, nil, nil, false)
return
}
us := options.Shader.convertUniforms(options.Uniforms)
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, sr, [graphics.ShaderImageNum - 1][2]float32{}, options.Shader.shader, us, false)
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, sr, offsets, options.Shader.shader, us, false)
}
// DrawRectShaderOptions represents options for DrawRectShader

90
shader_test.go
View File

@ -803,7 +803,6 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
func TestShaderSubImage(t *testing.T) {
const w, h = 16, 16
dst, _ := NewImage(w, h, FilterDefault)
s, err := NewShader([]byte(`package main
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
@ -829,6 +828,7 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
}
}
src0.ReplacePixels(pix0)
src0 = src0.SubImage(image.Rect(2, 2, 10, 10)).(*Image)
src1, _ := NewImage(w, h, FilterDefault)
pix1 := make([]byte, 4*w*h)
@ -843,22 +843,82 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
}
}
src1.ReplacePixels(pix1)
src1 = src1.SubImage(image.Rect(6, 6, 14, 14)).(*Image)
op := &DrawRectShaderOptions{}
op.Images[0] = src0.SubImage(image.Rect(2, 2, 10, 10)).(*Image)
op.Images[1] = src1.SubImage(image.Rect(6, 6, 14, 14)).(*Image)
dst.DrawRectShader(w/2, h/2, s, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if i < w/2 && j < h/2 {
want = color.RGBA{0xff, 0xff, 0, 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
testPixels := func(testname string, dst *Image) {
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if i < w/2 && j < h/2 {
want = color.RGBA{0xff, 0xff, 0, 0xff}
}
if got != want {
t.Errorf("%s dst.At(%d, %d): got: %v, want: %v", testname, i, j, got, want)
}
}
}
}
t.Run("DrawRectShader", func(t *testing.T) {
dst, _ := NewImage(w, h, FilterDefault)
op := &DrawRectShaderOptions{}
op.Images[0] = src0
op.Images[1] = src1
dst.DrawRectShader(w/2, h/2, s, op)
testPixels("DrawRectShader", dst)
})
t.Run("DrawTriangles", func(t *testing.T) {
dst, _ := NewImage(w, h, FilterDefault)
vs := []Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 2,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w / 2,
DstY: 0,
SrcX: 10,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h / 2,
SrcX: 2,
SrcY: 10,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w / 2,
DstY: h / 2,
SrcX: 10,
SrcY: 10,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
op := &DrawTrianglesOptions{}
op.Shader = s
op.Images[0] = src1
dst.DrawTriangles(vs, is, src0, op)
testPixels("DrawTriangles", dst)
})
}