示例#1
0
文件: gosgl.go 项目: rdterner/gosgl
func fill(canv *Canvas, alphaTex *glh.Texture, paint *Paint) {
	gGl.GlColorConfig.SetColor(paint.fillColor)
	defer gGl.GlColorConfig.Reset()
	gGl.Activate(gGl.FillDrawer)
	gl.ColorMask(true, true, true, true)
	gl.StencilMask(0x3)
	gl.StencilFunc(gl.LESS, 0, 0xff)
	w, h := canv.W, canv.H
	p := canv.toGLPoints([]Point{
		iPt(0, 0),
		iPt(w, 0),
		iPt(w, h),
		iPt(0, h),
	})
	vertices := []float32{
		p[0].X, p[0].Y, 0, 1,
		p[1].X, p[1].Y, 1, 1,
		p[2].X, p[2].Y, 1, 0,
		p[3].X, p[3].Y, 0, 0,
	}
	gl.BufferData(gl.ARRAY_BUFFER, len(vertices)*4, vertices, gl.STATIC_DRAW)

	elements := []uint32{
		0, 1, 2,
		2, 3, 0,
	}
	gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(elements)*4, elements, gl.STATIC_DRAW)

	glh.With(alphaTex, func() {
		gl.DrawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, nil)
	})
}
示例#2
0
文件: gosgl.go 项目: rdterner/gosgl
func (p *Path) draw(canv *Canvas, alphaBuffer *glh.Framebuffer, clrStencil bool) {
	gGl.QuadraticDrawConfig.SetExcludeTransluFrags(false)
	glh.With(alphaBuffer, func() {
		gl.ClearColor(0, 0, 0, 0)
		gl.Clear(gl.COLOR_BUFFER_BIT)
		p.glDraw(canv)
	})
	if clrStencil {
		gl.StencilMask(0x3)
		gl.ClearStencil(0x0)
		gl.Clear(gl.STENCIL_BUFFER_BIT)
	}
	gl.ColorMask(false, false, false, false)
	gl.StencilMask(0x3)
	gl.StencilFunc(gl.ALWAYS, 0, 0xff)
	gl.StencilOp(gl.KEEP, gl.KEEP, gl.INVERT)
	p.glDraw(canv)
	gl.StencilMask(0x1)
	gGl.QuadraticDrawConfig.SetExcludeTransluFrags(true)
	p.glDraw(canv)
}