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added a generic function to initialize the correct shader for any fill operation

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This commit is contained in:
Thomas Friedel 2018-02-09 11:35:32 +01:00
parent 3710a446b5
commit 91e8935866
1 changed files with 60 additions and 62 deletions
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122
canvas.go
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@ -350,6 +350,61 @@ func (cv *Canvas) SetFillStyle(value ...interface{}) {
}
}
func (cv *Canvas) useFillShader() (vertexLoc uint32) {
if lg := cv.state.fill.linearGradient; lg != nil {
lg.load()
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_1D, lg.tex)
gli.UseProgram(lgr.id)
from := cv.tf(lg.from)
to := cv.tf(lg.to)
dir := to.Sub(from)
length := dir.Len()
dir = dir.DivF(length)
gli.Uniform2f(lgr.canvasSize, cv.fw, cv.fh)
gli.Uniform2f(lgr.from, from[0], from[1])
gli.Uniform2f(lgr.dir, dir[0], dir[1])
gli.Uniform1f(lgr.len, length)
gli.Uniform1i(lgr.gradient, 0)
return lgr.vertex
}
if rg := cv.state.fill.radialGradient; rg != nil {
rg.load()
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_1D, rg.tex)
gli.UseProgram(rgr.id)
from := cv.tf(rg.from)
to := cv.tf(rg.to)
dir := to.Sub(from)
length := dir.Len()
dir = dir.DivF(length)
gli.Uniform2f(rgr.canvasSize, cv.fw, cv.fh)
gli.Uniform2f(rgr.from, from[0], from[1])
gli.Uniform2f(rgr.to, to[0], to[1])
gli.Uniform2f(rgr.dir, dir[0], dir[1])
gli.Uniform1f(rgr.radFrom, rg.radFrom)
gli.Uniform1f(rgr.radTo, rg.radTo)
gli.Uniform1f(rgr.len, length)
gli.Uniform1i(rgr.gradient, 0)
return rgr.vertex
}
if img := cv.state.fill.image; img != nil {
gli.UseProgram(ipr.id)
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_2D, img.tex)
gli.Uniform2f(ipr.canvasSize, cv.fw, cv.fh)
gli.Uniform2f(ipr.imageSize, float32(img.w), float32(img.h))
gli.Uniform1i(ipr.image, 0)
return ipr.vertex
}
gli.UseProgram(sr.id)
gli.Uniform2f(sr.canvasSize, cv.fw, cv.fh)
c := cv.state.fill.color
gli.Uniform4f(sr.color, c.r, c.g, c.b, c.a)
return sr.vertex
}
// SetStrokeColor sets the color for any line drawing calls
func (cv *Canvas) SetStrokeColor(value ...interface{}) {
c, ok := parseColor(value...)
@ -452,66 +507,9 @@ func (cv *Canvas) FillRect(x, y, w, h float32) {
data := [8]float32{p0[0], p0[1], p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]}
gli.BufferData(gl_ARRAY_BUFFER, len(data)*4, unsafe.Pointer(&data[0]), gl_STREAM_DRAW)
if lg := cv.state.fill.linearGradient; lg != nil {
lg.load()
gli.UseProgram(lgr.id)
gli.VertexAttribPointer(lgr.vertex, 2, gl_FLOAT, false, 0, nil)
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_1D, lg.tex)
gli.Uniform2f(lgr.canvasSize, cv.fw, cv.fh)
from := cv.tf(lg.from)
to := cv.tf(lg.to)
dir := to.Sub(from)
length := dir.Len()
dir = dir.DivF(length)
gli.Uniform2f(lgr.from, from[0], from[1])
gli.Uniform2f(lgr.dir, dir[0], dir[1])
gli.Uniform1f(lgr.len, length)
gli.Uniform1i(lgr.gradient, 0)
gli.EnableVertexAttribArray(lgr.vertex)
gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
gli.DisableVertexAttribArray(lgr.vertex)
} else if rg := cv.state.fill.radialGradient; rg != nil {
rg.load()
gli.UseProgram(rgr.id)
gli.VertexAttribPointer(rgr.vertex, 2, gl_FLOAT, false, 0, nil)
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_1D, rg.tex)
gli.Uniform2f(rgr.canvasSize, cv.fw, cv.fh)
from := cv.tf(rg.from)
to := cv.tf(rg.to)
dir := to.Sub(from)
length := dir.Len()
dir = dir.DivF(length)
gli.Uniform2f(rgr.from, from[0], from[1])
gli.Uniform2f(rgr.to, to[0], to[1])
gli.Uniform2f(rgr.dir, dir[0], dir[1])
gli.Uniform1f(rgr.radFrom, rg.radFrom)
gli.Uniform1f(rgr.radTo, rg.radTo)
gli.Uniform1f(rgr.len, length)
gli.Uniform1i(rgr.gradient, 0)
gli.EnableVertexAttribArray(rgr.vertex)
gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
gli.DisableVertexAttribArray(rgr.vertex)
} else if img := cv.state.fill.image; img != nil {
gli.UseProgram(ipr.id)
gli.VertexAttribPointer(ipr.vertex, 2, gl_FLOAT, false, 0, nil)
gli.ActiveTexture(gl_TEXTURE0)
gli.BindTexture(gl_TEXTURE_1D, img.tex)
gli.Uniform2f(ipr.canvasSize, cv.fw, cv.fh)
gli.Uniform2f(ipr.imageSize, float32(img.w), float32(img.h))
gli.Uniform1i(ipr.image, 0)
gli.EnableVertexAttribArray(ipr.vertex)
gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
gli.DisableVertexAttribArray(ipr.vertex)
} else {
gli.UseProgram(sr.id)
gli.VertexAttribPointer(sr.vertex, 2, gl_FLOAT, false, 0, nil)
gli.Uniform2f(sr.canvasSize, cv.fw, cv.fh)
c := cv.state.fill.color
gli.Uniform4f(sr.color, c.r, c.g, c.b, c.a)
gli.EnableVertexAttribArray(lgr.vertex)
gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
gli.DisableVertexAttribArray(lgr.vertex)
}
vertex := cv.useFillShader()
gli.VertexAttribPointer(vertex, 2, gl_FLOAT, false, 0, nil)
gli.EnableVertexAttribArray(vertex)
gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
gli.DisableVertexAttribArray(vertex)
}