func (c *glContext) setUniforms(uniformOffset, image int) {
frag := c.uniforms[uniformOffset]
gl.Uniform4fv(c.shader.locations[glnvgLocFRAG], frag[:])
if image != 0 {
c.bindTexture(&c.findTexture(image).tex)
checkError(c, "tex paint tex")
} else {
c.bindTexture(&gl.Texture{})
}
}
func (u *shaderUniform) bind(context *context, v interface{}) {
switch u.ty {
case stFloatMat2:
gl.UniformMatrix2fv(u.location, v.([]float32))
case stFloatMat3:
switch m := v.(type) {
case math.Mat3:
gl.UniformMatrix3fv(u.location, m[:])
case []float32:
gl.UniformMatrix3fv(u.location, m)
}
case stFloatMat4:
gl.UniformMatrix4fv(u.location, v.([]float32))
case stFloatVec1:
switch v := v.(type) {
case float32:
gl.Uniform1f(u.location, v)
case []float32:
gl.Uniform1fv(u.location, v)
}
case stFloatVec2:
switch v := v.(type) {
case math.Vec2:
gl.Uniform2fv(u.location, []float32{v.X, v.Y})
case []float32:
if len(v)%2 != 0 {
panic(fmt.Errorf("Uniform '%s' of type vec2 should be an float32 array with a multiple of two length", u.name))
}
gl.Uniform2fv(u.location, v)
}
case stFloatVec3:
switch v := v.(type) {
case math.Vec3:
gl.Uniform3fv(u.location, []float32{v.X, v.Y, v.Z})
case []float32:
if len(v)%3 != 0 {
panic(fmt.Errorf("Uniform '%s' of type vec3 should be an float32 array with a multiple of three length", u.name))
}
gl.Uniform3fv(u.location, v)
}
case stFloatVec4:
switch v := v.(type) {
case math.Vec4:
gl.Uniform4fv(u.location, []float32{v.X, v.Y, v.Z, v.W})
case gxui.Color:
gl.Uniform4fv(u.location, []float32{v.R, v.G, v.B, v.A})
case []float32:
if len(v)%4 != 0 {
panic(fmt.Errorf("Uniform '%s' of type vec4 should be an float32 array with a multiple of four length", u.name))
}
gl.Uniform4fv(u.location, v)
}
case stSampler2d:
tc := v.(*textureContext)
gl.ActiveTexture(gl.Enum(gl.TEXTURE0 + u.textureUnit))
gl.BindTexture(gl.TEXTURE_2D, tc.texture)
gl.Uniform1i(u.location, u.textureUnit)
default:
panic(fmt.Errorf("Uniform of unsupported type %s", u.ty))
}
}