func (sg *OpenGLGraphics) Line(x0, y0, x1, y1 int, style chart.Style) {
//log.Panicf("Unimplemented: %s", whoami())
defer glh.OpenGLSentinel()()
gl.LineWidth(float32(style.LineWidth))
// TODO: line stipple?
//sc := chart.Color2RGBA(style.LineColor, uint8(style.Alpha*255))
//log.Printf("color: %s %d %d %d %d", style.FillColor, sc.R, sc.G, sc.B, sc.A)
glh.ColorC(style.LineColor)
//sc := style.LineColor
//gl.Color4ub(sc.R, sc.G, sc.B, sc.A)
// TODO: Check this works
glh.With(glh.Attrib{gl.ENABLE_BIT | gl.COLOR_BUFFER_BIT}, func() {
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
glh.With(glh.Primitive{gl.LINES}, func() {
gl.Vertex2i(x0, y0)
gl.Vertex2i(x1, y1)
})
})
}
func (sg *OpenGLGraphics) Rect(x, y, w, h int, style chart.Style) {
// log.Panicf("Unimplemented: %s", whoami())
x, y, w, h = chart.SanitizeRect(x, y, w, h, style.LineWidth)
defer glh.OpenGLSentinel()()
//
glh.With(glh.Attrib{gl.ENABLE_BIT | gl.COLOR_BUFFER_BIT}, func() {
glh.ColorC(style.FillColor)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.QUADS)
glh.Squarei(x, y, w, h)
gl.End()
})
if style.LineWidth != 0 {
gl.LineWidth(float32(style.LineWidth))
//log.Print("Linewidth: ", float32(style.LineWidth))
glh.With(glh.Attrib{gl.ENABLE_BIT | gl.COLOR_BUFFER_BIT}, func() {
glh.ColorC(style.LineColor)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.LINE_LOOP)
glh.Squarei(x, y, w, h)
gl.End()
})
}
// linecol := style.LineColor
// if linecol != "" {
// s = fmt.Sprintf("stroke:%s; ", linecol)
// } else {
// linecol = "#808080"
// }
// s += fmt.Sprintf("stroke-width: %d; ", style.LineWidth)
// s += fmt.Sprintf("opacity: %.2f; ", 1-style.Alpha)
// if style.FillColor != "" {
// s += fmt.Sprintf("fill: %s; fill-opacity: %.2f", style.FillColor, 1-style.Alpha)
// } else {
// s += "fill-opacity: 0"
// }
// sg.svg.Rect(x, y, w, h, s)
// GenericRect(sg, x, y, w, h, style) // TODO
}
func newTexDrawer(vshader, fshader string) *GlDrawer {
dr := NewGlDrawer(vshader, fshader)
program := dr.program
posAttr := program.GetAttribLocation("position")
posAttr.AttribPointer(2, gl.FLOAT, false, 4*4, uintptr(0))
posAttr.EnableArray()
texAttr := program.GetAttribLocation("texcoord")
texAttr.AttribPointer(2, gl.FLOAT, false, 4*4, uintptr(8))
glh.OpenGLSentinel()
texAttr.EnableArray()
return dr
}
func MakeTextureFromTGA(fname string) gl.Texture {
tex := gl.GenTexture()
tex.Bind(gl.TEXTURE_2D)
glfw.LoadTexture2D(fname, 0)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.GenerateMipmap(gl.TEXTURE_2D)
glh.OpenGLSentinel() // check for errors
return tex
}
func main() {
window, err := initGL()
if err != nil || window == nil {
log.Printf("InitGL: %v", err)
return
}
defer glfw.Terminate()
shaderLoad()
cube, square = createBuffers()
defer cube.Release()
defer square.Release()
timeframe = 0.0
stack := trig.NewMatrixStack()
stack.Push(trig.TranslateXYZ(-0.5, -0.5, 0), trig.RotateY(math.Pi/4))
modelMatrix = stack.Get()
viewMatrix = trig.TranslateXYZ(0, 0, -2)
projMatrix = trig.Frustum(-0.5, 0.5, -0.5, 0.5, 1, 10)
textureBank = helper.InitTextureBank(4, 1)
textureBank.InitSamplerWithDefaults(0)
textureBank.InstantiateSamplers()
textureBank.InstantiateGeometry(0, 768, 768, 0, 0)
textureBank.InstantiateGeometry(1, 768, 768, 0, 0)
textureBank.InstantiateGeometry(2, 256, 256, 256, 0)
textureBank.InstantiateGeometry(3, 256, 0, 0, 0)
textureBank.InstantiateFormat(0, gl.FLOAT, gl.RGB, gl.RGB32F)
textureBank.InstantiateFormat(1, gl.FLOAT, gl.RGB, gl.RGB32F)
textureBank.InstantiateFormat(2, gl.UNSIGNED_BYTE, gl.RED, gl.R8)
textureBank.InstantiateFormat(3, gl.UNSIGNED_BYTE, gl.RGBA, gl.RGBA)
textureBank.ConfigUnit(0, gl.TEXTURE_2D, 0)
textureBank.ConfigUnit(1, gl.TEXTURE_2D, 0)
textureBank.ConfigUnit(2, gl.TEXTURE_3D, 0)
textureBank.ConfigUnit(3, gl.TEXTURE_1D, 0)
loadTexture()
textureBank.InstantiateTextures()
glh.OpenGLSentinel()()
glh.With(textureBank, func() {
framebuffer = &helper.Framebuffer{}
framebuffer.Outputs = []gl.Texture{
textureBank.Units[0].Texture,
textureBank.Units[1].Texture,
}
framebuffer.Sizes = []*helper.TextureGeometry{
textureBank.PixelData[0].Geometry[0],
textureBank.PixelData[1].Geometry[0],
}
for !window.ShouldClose() {
render()
compose()
window.SwapBuffers()
glfw.PollEvents()
}
})
os.Exit(0)
}
