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stencil buffer usage bugfix

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This commit is contained in:
Thomas Friedel 2018-03-21 15:45:19 +01:00
parent 26d11865b5
commit e138d853c6
1 changed files with 10 additions and 13 deletions
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23
paths.go
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@ -243,15 +243,8 @@ func (cv *Canvas) Stroke() {
cv.activate()
gli.ColorMask(false, false, false, false)
gli.StencilFunc(gl_ALWAYS, 1, 0xFF)
gli.StencilOp(gl_KEEP, gl_KEEP, gl_REPLACE)
gli.StencilMask(0x01)
gli.BindBuffer(gl_ARRAY_BUFFER, buf)
var buf [1000]float32
tris := buf[:0]
var triBuf [1000]float32
tris := triBuf[:0]
tris = append(tris, 0, 0, float32(cv.fw), 0, float32(cv.fw), float32(cv.fh), 0, 0, float32(cv.fw), float32(cv.fh), 0, float32(cv.fh))
start := true
@ -309,14 +302,18 @@ func (cv *Canvas) Stroke() {
start = false
}
gli.BindBuffer(gl_ARRAY_BUFFER, buf)
gli.BufferData(gl_ARRAY_BUFFER, len(tris)*4, unsafe.Pointer(&tris[0]), gl_STREAM_DRAW)
gli.ColorMask(false, false, false, false)
gli.StencilFunc(gl_ALWAYS, 1, 0xFF)
gli.StencilOp(gl_REPLACE, gl_REPLACE, gl_REPLACE)
gli.StencilMask(0x01)
gli.UseProgram(sr.id)
gli.Uniform4f(sr.color, 0, 0, 0, 0)
gli.Uniform2f(sr.canvasSize, float32(cv.fw), float32(cv.fh))
gli.ColorMask(false, false, false, false)
gli.EnableVertexAttribArray(sr.vertex)
gli.VertexAttribPointer(sr.vertex, 2, gl_FLOAT, false, 0, nil)
gli.DrawArrays(gl_TRIANGLES, 6, int32(len(tris)/2-6))
@ -334,7 +331,7 @@ func (cv *Canvas) Stroke() {
gli.DisableVertexAttribArray(vertex)
gli.StencilOp(gl_KEEP, gl_KEEP, gl_KEEP)
gli.StencilFunc(gl_EQUAL, 0, 0xFF)
gli.StencilFunc(gl_ALWAYS, 0, 0xFF)
gli.StencilMask(0x01)
gli.Clear(gl_STENCIL_BUFFER_BIT)
@ -462,7 +459,7 @@ func (cv *Canvas) clip(path []pathPoint) {
gli.ColorMask(false, false, false, false)
gli.StencilFunc(gl_ALWAYS, 2, 0xFF)
gli.StencilOp(gl_KEEP, gl_KEEP, gl_REPLACE)
gli.StencilOp(gl_REPLACE, gl_REPLACE, gl_REPLACE)
gli.StencilMask(0x02)
gli.Clear(gl_STENCIL_BUFFER_BIT)