func main() { if err := glfw.Init(); err != nil { log.Fatalln("failed to initialize glfw:", err) } defer glfw.Terminate() glfw.WindowHint(glfw.Resizable, glfw.False) glfw.WindowHint(glfw.ContextVersionMajor, 2) glfw.WindowHint(glfw.ContextVersionMinor, 1) window, err := glfw.CreateWindow(800, 600, "Cube", nil, nil) if err != nil { panic(err) } window.MakeContextCurrent() if err := gl.Init(); err != nil { panic(err) } texture = newTexture("square.png") defer gl.DeleteTextures(1, &texture) setupScene() for !window.ShouldClose() { drawScene() window.SwapBuffers() glfw.PollEvents() } }
func (ctx *DrawContext) drawHud(o *orrery.Orrery, frametime time.Duration) { txt, size, err := ctx.createHudTexture(o, frametime) if err != nil { log.Fatalf(`can't create texture from text surface: %s`, err) } defer gl.DeleteTextures(1, &txt) gl.MatrixMode(gl.PROJECTION) gl.PushMatrix() gl.LoadIdentity() gl.Ortho(0.0, float64(ctx.width), float64(ctx.height), 0.0, -1.0, 1.0) gl.MatrixMode(gl.MODELVIEW) gl.LoadIdentity() gl.Clear(gl.DEPTH_BUFFER_BIT) gl.BindTexture(gl.TEXTURE_2D, txt) gl.Enable(gl.TEXTURE_2D) defer gl.Disable(gl.TEXTURE_2D) gl.Color3f(1, 1, 1) gl.Begin(gl.QUADS) gl.TexCoord2f(0, 0) gl.Vertex2f(0.0, 0.0) gl.TexCoord2f(1, 0) gl.Vertex2f(float32(size[0]), 0.0) gl.TexCoord2f(1, 1) gl.Vertex2f(float32(size[0]), float32(size[1])) gl.TexCoord2f(0, 1) gl.Vertex2f(0.0, float32(size[1])) gl.End() gl.PopMatrix() }
func (c *Context) DeleteTexture(t Texture) { _ = c.runOnContextThread(func() error { tt := uint32(t) if !gl.IsTexture(tt) { return nil } if c.lastTexture == t { c.lastTexture = invalidTexture } gl.DeleteTextures(1, &tt) return nil }) }
func setupScene() { gl.ClearColor(0, 0, 0, 0) if texDel { gl.DeleteTextures(1, tex1) } tex1 = newTexture(*slides[selCell].getImage(monWidth, monHeight)) gl.MatrixMode(gl.PROJECTION) gl.LoadIdentity() gl.Ortho(-1, 1, -1, 1, 1.0, 10.0) gl.MatrixMode(gl.MODELVIEW) gl.LoadIdentity() texDel = true }
func (atlas *FontAtlas) draw(rendered *image.RGBA, b Bounds) { var texture uint32 gl.Enable(gl.TEXTURE_2D) gl.GenTextures(1, &texture) gl.BindTexture(gl.TEXTURE_2D, texture) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE) gl.TexImage2D( gl.TEXTURE_2D, 0, gl.RGBA, int32(rendered.Bounds().Dx()), int32(rendered.Bounds().Dy()), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(rendered.Pix)) gl.Enable(gl.BLEND) gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA) gl.Begin(gl.QUADS) { gl.TexCoord2f(0, 0) gl.Vertex2f(b.Min.X, b.Min.Y) gl.TexCoord2f(1, 0) gl.Vertex2f(b.Max.X, b.Min.Y) gl.TexCoord2f(1, 1) gl.Vertex2f(b.Max.X, b.Max.Y) gl.TexCoord2f(0, 1) gl.Vertex2f(b.Min.X, b.Max.Y) } gl.End() gl.Disable(gl.BLEND) gl.DeleteTextures(1, &texture) gl.Disable(gl.TEXTURE_2D) }
func (atlas *FontAtlas) upload() { if !atlas.Dirty { return } atlas.Dirty = false gl.Enable(gl.TEXTURE_2D) if atlas.Texture != 0 { gl.DeleteTextures(1, &atlas.Texture) atlas.Texture = 0 } gl.GenTextures(1, &atlas.Texture) gl.BindTexture(gl.TEXTURE_2D, atlas.Texture) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE) gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE) gl.TexImage2D( gl.TEXTURE_2D, 0, gl.RGBA, int32(atlas.Image.Rect.Size().X), int32(atlas.Image.Rect.Size().Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(atlas.Image.Pix)) if err := gl.GetError(); err != 0 { log.Println(err) } gl.Disable(gl.TEXTURE_2D) }
// DeleteTexture deletes the given texture object. // // http://www.khronos.org/opengles/sdk/docs/man3/html/glDeleteTextures.xhtml func DeleteTexture(v Texture) { gl.DeleteTextures(1, &v.Value) }
//Creates a new engine and populates it with the core functions func LoadGraphics(e *Engine) *Engine { e = add(e, "glfw.Init", NewCode("glfw.Init", 0, func(e *Engine, c *Thingy) *Engine { err := glfw.Init() if err != nil { panic(err) } return e })) e = add(e, "GLFWEVENTLOOP", NewCode("GLFWEVENTLOOP", 1, func(e *Engine, c *Thingy) *Engine { var el1 *Thingy el1, e.dataStack = popStack(e.dataStack) window := el1._structVal.(*glfw.Window) window.MakeContextCurrent() if err := gl.Init(); err != nil { panic(err) } texture = newTexture("square.png") defer gl.DeleteTextures(1, &texture) setupScene() for !window.ShouldClose() { drawScene() window.SwapBuffers() glfw.PollEvents() } return e })) e = add(e, "wg.GetStringBounds", NewCode("wg.GetStringBounds", 0, func(e *Engine, c *Thingy) *Engine { var el1 *Thingy el1, e.dataStack = popStack(e.dataStack) left, top, right, bottom := gc.GetStringBounds(el1.getString()) e.dataStack = append(e.dataStack, NewString(fmt.Sprintf("%v", bottom), c)) e.dataStack = append(e.dataStack, NewString(fmt.Sprintf("%v", right), c)) e.dataStack = append(e.dataStack, NewString(fmt.Sprintf("%v", top), c)) e.dataStack = append(e.dataStack, NewString(fmt.Sprintf("%v", left), c)) return e })) e = add(e, "wg.SetFillColor", NewCode("wg.SetFillColor", 1, func(e *Engine, c *Thingy) *Engine { var el1 *Thingy el1, e.dataStack = popStack(e.dataStack) col := el1._structVal.(color.RGBA) EnsureGC() gc.SetFillColor(col) return e })) e = add(e, "wg.SetStrokeColor", NewCode("wg.SetStrokeColor", 1, func(e *Engine, c *Thingy) *Engine { var el1 *Thingy el1, e.dataStack = popStack(e.dataStack) col := el1._structVal.(color.RGBA) EnsureGC() gc.SetStrokeColor(col) return e })) e = add(e, "wg.CloseAndFill", NewCode("wg.CloseAndFill", 0, func(e *Engine, c *Thingy) *Engine { EnsureGC() gc.Close() gc.FillStroke() return e })) e = add(e, "wg.MoveTo", NewCode("wg.MoveTo", 2, func(e *Engine, c *Thingy) *Engine { var el1, el2 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseFloat(el1.getString(), 32) x2, _ := strconv.ParseFloat(el2.getString(), 32) EnsureGC() gc.MoveTo(float64(x1), float64(x2)) // should always be called first for a new path return e })) e = add(e, "wg.LineTo", NewCode("wg.LineTo", 2, func(e *Engine, c *Thingy) *Engine { var el1, el2 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseFloat(el1.getString(), 32) x2, _ := strconv.ParseFloat(el2.getString(), 32) EnsureGC() gc.LineTo(float64(x1), float64(x2)) // should always be called first for a new path return e })) e = add(e, "wg.RoundedRectangle", NewCode("wg.RoundedRectangle", 2, func(e *Engine, c *Thingy) *Engine { var el1, el2, el3, el4 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) el3, e.dataStack = popStack(e.dataStack) el4, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseFloat(el1.getString(), 32) x2, _ := strconv.ParseFloat(el2.getString(), 32) x3, _ := strconv.ParseFloat(el3.getString(), 32) x4, _ := strconv.ParseFloat(el4.getString(), 32) EnsureGC() draw2dkit.RoundedRectangle(gc, x1, x2, x3, x4, 10, 10) gc.FillStroke() return e })) e = add(e, "wg.FillStringAt", NewCode("wg.FillStringAt", 3, func(e *Engine, c *Thingy) *Engine { var el1, el2, el3 *Thingy el3, e.dataStack = popStack(e.dataStack) el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseFloat(el1.getString(), 32) x2, _ := strconv.ParseFloat(el2.getString(), 32) EnsureGC() // Set the font luximbi.ttf gc.SetFontData(draw2d.FontData{Name: "luxi", Family: draw2d.FontFamilyMono, Style: draw2d.FontStyleBold | draw2d.FontStyleItalic}) // Set the fill text color to black gc.SetFillColor(image.White) gc.SetFontSize(15) gc.FillStringAt(el3.getString(), float64(x1), float64(x2)) // should always be called first for a new path return e })) e = add(e, "WG.CLEAR", NewCode("WG.CLEAR", 1, func(e *Engine, c *Thingy) *Engine { var el3 *Thingy el3, e.dataStack = popStack(e.dataStack) col := el3._structVal.(color.RGBA) wg.ClearImage(col) return e })) e = add(e, "WG.TEST", NewCode("WG.TEST", 0, func(e *Engine, c *Thingy) *Engine { /*var el1, el2,el3 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) el3, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseInt( el1.getString(), 10, 32 ) x2, _ := strconv.ParseInt( el2.getString(), 10, 32 ) col := el3._structVal.(color.RGBA) */ EnsureGC() // Set some properties gc.SetFillColor(color.RGBA{0x44, 0xff, 0x44, 0xff}) gc.SetStrokeColor(color.RGBA{0x44, 0x44, 0x44, 0xff}) gc.SetLineWidth(5) // Draw a closed shape gc.MoveTo(100, 100) // should always be called first for a new path gc.LineTo(600, 150) gc.QuadCurveTo(600, 10, 10, 10) gc.Close() gc.FillStroke() return e })) e = add(e, "WG.SETPOINT", NewCode("WG.SETPOINT", 3, func(e *Engine, c *Thingy) *Engine { var el1, el2, el3 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) el3, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseInt(el1.getString(), 10, 32) x2, _ := strconv.ParseInt(el2.getString(), 10, 32) col := el3._structVal.(color.RGBA) wg.GetImage().Set(int(x1), int(x2), col) return e })) e = add(e, "RGBA", NewCode("RGBA", 3, func(e *Engine, c *Thingy) *Engine { var el1, el2, el3, el4 *Thingy el1, e.dataStack = popStack(e.dataStack) el2, e.dataStack = popStack(e.dataStack) el3, e.dataStack = popStack(e.dataStack) el4, e.dataStack = popStack(e.dataStack) x1, _ := strconv.ParseInt(el1.getString(), 10, 32) x2, _ := strconv.ParseInt(el2.getString(), 10, 32) x3, _ := strconv.ParseInt(el3.getString(), 10, 32) x4, _ := strconv.ParseInt(el4.getString(), 10, 32) col := color.RGBA{uint8(x1), uint8(x2), uint8(x3), uint8(x4)} e.dataStack = append(e.dataStack, NewWrapper(col)) return e })) e = add(e, "WG.GETKEY", NewCode("WG.GETKEY", 0, func(e *Engine, c *Thingy) *Engine { var el1 *Thingy el1, e.dataStack = popStack(e.dataStack) xx, _ := strconv.ParseInt(el1.getString(), 10, 32) var ret *Thingy if wg.GetKey(int(xx)) { ret = NewBool(1) } else { ret = NewBool(0) } e.dataStack = append(e.dataStack, ret) return e })) e = add(e, "WG.START", NewCode("WG.START", 1, func(ne *Engine, c *Thingy) *Engine { CallbackState = ne var port *Thingy port, ne.dataStack = popStack(ne.dataStack) portnum, _ := strconv.ParseInt(port.getString(), 10, 32) wg.Start(800, 600, int(portnum), WgCallback) return ne })) e = add(e, "glfw.CreateWindow", NewCode("glfw.CreateWindow", 2, func(ne *Engine, c *Thingy) *Engine { var x, y, title *Thingy x, ne.dataStack = popStack(ne.dataStack) y, ne.dataStack = popStack(ne.dataStack) title, ne.dataStack = popStack(ne.dataStack) xx, _ := strconv.ParseInt(x.getString(), 10, 32) yy, _ := strconv.ParseInt(y.getString(), 10, 32) glfw.WindowHint(glfw.Resizable, glfw.False) glfw.WindowHint(glfw.ContextVersionMajor, 2) glfw.WindowHint(glfw.ContextVersionMinor, 1) window, err := glfw.CreateWindow(int(xx), int(yy), title.getString(), nil, nil) if err != nil { panic(err) } ne.dataStack = pushStack(ne.dataStack, NewWrapper(window)) return ne })) return e }
func (c *Context) DeleteTexture(t Texture) { tt := uint32(t) gl.DeleteTextures(1, &tt) }
// DeleteTexture will free the texture from the GPU memory func (c *Context) DeleteTexture(texture *Texture) { gl.DeleteTextures(1, &[]uint32{texture.uint32}[0]) }
func (texture *Texture) Delete() { gl.DeleteTextures(1, &texture.id) }
// Release releases font resources. // A font can no longer be used for rendering after this call completes. func (f *Font) Release() { gl.DeleteTextures(1, &f.texture) gl.DeleteLists(f.listbase, int32(len(f.config.Glyphs))) f.config = nil }