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go-opengl-pixel
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fix drawing onto Canvas

This commit is contained in:
faiface 2017-04-10 00:41:56 +02:00
parent 5be03c8beb
commit 8379e17cac
1 changed files with 7 additions and 5 deletions
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12
pixelgl/canvas.go
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@ -145,8 +145,8 @@ func (c *Canvas) setGlhfBounds() {
}
// must be manually called inside mainthread
func (c *Canvas) setBlendFunc() {
switch c.cmp {
func setBlendFunc(cmp pixel.ComposeMethod) {
switch cmp {
case pixel.ComposeOver:
glhf.BlendFunc(glhf.One, glhf.OneMinusSrcAlpha)
case pixel.ComposeIn:
@ -218,12 +218,14 @@ func (ct *canvasTriangles) draw(tex *glhf.Texture, bounds pixel.Rect) {
ct.dst.gf.Dirty()
// save the current state vars to avoid race condition
cmp := ct.dst.cmp
mat := ct.dst.mat
col := ct.dst.col
smt := ct.dst.smooth
mainthread.CallNonBlock(func() {
ct.dst.setGlhfBounds()
ct.dst.setBlendFunc()
setBlendFunc(cmp)
frame := ct.dst.gf.Frame()
shader := ct.dst.shader
@ -256,8 +258,8 @@ func (ct *canvasTriangles) draw(tex *glhf.Texture, bounds pixel.Rect) {
float32(bh),
})
if tex.Smooth() != ct.dst.smooth {
tex.SetSmooth(ct.dst.smooth)
if tex.Smooth() != smt {
tex.SetSmooth(smt)
}
ct.vs.Begin()