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mipmap: Bug fix: Crash at DrawTrianglesWithShader

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This commit is contained in:
Hajime Hoshi 2020-07-16 23:02:33 +09:00
parent c4c9771b78
commit 52773e1d12
1 changed files with 27 additions and 27 deletions
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16
internal/mipmap/mipmap.go
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@ -88,7 +88,9 @@ func (m *Mipmap) Pixels(x, y, width, height int) ([]byte, error) {
}
func (m *Mipmap) DrawTriangles(src *Mipmap, vertices []float32, indices []uint16, colorm *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address, sourceRegion driver.Region, shader *Shader, uniforms []interface{}, images []*Mipmap) {
level := math.MaxInt32
level := 0
if src != nil && !src.volatile && filter != driver.FilterScreen {
level = math.MaxInt32
for i := 0; i < len(indices)/3; i++ {
const n = graphics.VertexFloatNum
dx0 := vertices[n*indices[3*i]+0]
@ -103,16 +105,17 @@ func (m *Mipmap) DrawTriangles(src *Mipmap, vertices []float32, indices []uint16
dy2 := vertices[n*indices[3*i+2]+1]
sx2 := vertices[n*indices[3*i+2]+2]
sy2 := vertices[n*indices[3*i+2]+3]
if l := src.mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, filter); level > l {
if l := mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, filter); level > l {
level = l
}
if l := src.mipmapLevelFromDistance(dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, filter); level > l {
if l := mipmapLevelFromDistance(dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, filter); level > l {
level = l
}
if l := src.mipmapLevelFromDistance(dx2, dy2, dx0, dy0, sx2, sy2, sx0, sy0, filter); level > l {
if l := mipmapLevelFromDistance(dx2, dy2, dx0, dy0, sx2, sy2, sx0, sy0, filter); level > l {
level = l
}
}
}
if colorm != nil && colorm.ScaleOnly() {
body, _ := colorm.UnsafeElements()
@ -257,13 +260,10 @@ func (m *Mipmap) disposeMipmaps() {
}
// mipmapLevel returns an appropriate mipmap level for the given distance.
func (m *Mipmap) mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1 float32, filter driver.Filter) int {
func mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1 float32, filter driver.Filter) int {
if filter == driver.FilterScreen {
return 0
}
if m.volatile {
return 0
}
d := (dx1-dx0)*(dx1-dx0) + (dy1-dy0)*(dy1-dy0)
s := (sx1-sx0)*(sx1-sx0) + (sy1-sy0)*(sy1-sy0)