func (r *GlowRenderer) Draw() (err error) {
gl.UseProgram(r.shader)
gl.Uniform1i(r.textureUnitLoc, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, r.coords)
gl.EnableVertexAttribArray(r.positionLoc)
gl.VertexAttribPointer(r.positionLoc, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))
gl.EnableVertexAttribArray(r.textureLoc)
gl.VertexAttribPointer(r.textureLoc, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))
gl.Uniform1i(r.blurAmountLoc, int32(r.blur))
gl.Uniform1f(r.blurScaleLoc, r.scale)
gl.Uniform1f(r.blurStrengthLoc, r.strength)
gl.Uniform2f(r.bufferDimensionsLoc, float32(r.width), float32(r.height))
gl.BindFramebuffer(gl.FRAMEBUFFER, r.BlurFb)
gl.Viewport(0, 0, int32(r.width), int32(r.height))
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, r.GlowTex)
gl.Uniform1i(r.orientationLoc, 0)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
gl.Viewport(0, 0, int32(r.oldwidth), int32(r.oldheight))
gl.BlendFunc(gl.ONE, gl.ONE)
gl.BindTexture(gl.TEXTURE_2D, r.BlurTex)
gl.Uniform1i(r.orientationLoc, 1)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
return nil
}
// RenderString must be called on the render thread. x and y are the initial position of the pen,
// in screen coordinates, and height is the height of a full line of text, in screen coordinates.
func (d *Dictionary) RenderString(str string, x, y, height float64) {
if str == "" {
return
}
// No synchronization necessary because everything is run serially on the render thread anyway.
if d.strs == nil {
d.strs = make(map[string]strData)
}
data, ok := d.strs[str]
if !ok {
data = d.bindString(str)
d.strs[str] = data
}
render.EnableShader("glop.font")
defer render.EnableShader("")
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, d.atlas.texture)
location, _ := render.GetUniformLocation("glop.font", "tex")
gl.Uniform1i(location, 0)
gl.BindSampler(0, d.atlas.sampler)
location, _ = render.GetUniformLocation("glop.font", "height")
gl.Uniform1f(location, float32(height))
var viewport [4]int32
gl.GetIntegerv(gl.VIEWPORT, &viewport[0])
location, _ = render.GetUniformLocation("glop.font", "screen")
gl.Uniform2f(location, float32(viewport[2]), float32(viewport[3]))
location, _ = render.GetUniformLocation("glop.font", "pen")
gl.Uniform2f(location, float32(x)+float32(viewport[0]), float32(y)+float32(viewport[1]))
location, _ = render.GetUniformLocation("glop.font", "textColor")
gl.Uniform3f(location, d.color[0], d.color[1], d.color[2])
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.BindVertexArray(data.varrays[0])
gl.DrawArrays(gl.TRIANGLES, 0, data.count)
}
func (r *BatchRenderer) Draw(batch *Batch, x, y, rot float32) error {
batch.Texture.Bind()
gl.BindBuffer(gl.ARRAY_BUFFER, batch.Buffer)
gl.EnableVertexAttribArray(r.PositionLoc)
gl.VertexAttribPointer(r.PositionLoc, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))
gl.EnableVertexAttribArray(r.TextureLoc)
gl.VertexAttribPointer(r.TextureLoc, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))
m := mgl32.Translate3D(x, y, 0.0).Mul4(mgl32.HomogRotate3DZ(rot))
gl.UniformMatrix4fv(r.ModelViewLoc, 1, false, &m[0])
gl.Uniform2f(r.TexOffsetLoc, batch.textureOffset.X(), batch.textureOffset.Y())
gl.DrawArrays(gl.TRIANGLES, 0, int32(batch.Count))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return nil
}