235 lines
7.8 KiB
C#
235 lines
7.8 KiB
C#
using GLFW;
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using Silk.NET.OpenGL;
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace _2DGAMELIB
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{
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public enum MouseButtons {
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None = 0,
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Left = 1,
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Right = 2,
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Middle = 4,
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Button4 = 8,
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Button5 = 16
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}
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public class GlImage
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{
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Silk.NET.OpenGL.GL gl;
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//yeah this is a little bit sketchy
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public static unsafe GLFW.Window PtrToWindow(IntPtr source)
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{
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var sourceRef = __makeref(source);
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var dest = default(GLFW.Window);
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var destRef = __makeref(dest);
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*(IntPtr*)&destRef = *(IntPtr*)&sourceRef;
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return __refvalue(destRef, GLFW.Window);
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}
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public GLFW.Window window;
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private uint shader_program;
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private uint texture;
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private uint vertex_buf;
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private uint vao;
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public GlImage() { }
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public Vector2D GetCursorPoint() {
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double x, y;
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Glfw.GetCursorPosition(window, out x, out y);
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return new Vector2D(x, y);
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}
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public void SetCursorPoint(Vector2D pos) {
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Glfw.SetCursorPosition(window, pos.X, pos.Y);
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}
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public MouseButtons GetMouseButtons() {
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MouseButtons btns = 0;
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if (Glfw.GetMouseButton(window, MouseButton.Left) == InputState.Press)
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btns |= MouseButtons.Left;
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if (Glfw.GetMouseButton(window, MouseButton.Right) == InputState.Press)
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btns |= MouseButtons.Right;
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if (Glfw.GetMouseButton(window, MouseButton.Middle) == InputState.Press)
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btns |= MouseButtons.Middle;
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if (Glfw.GetMouseButton(window, MouseButton.Button4) == InputState.Press)
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btns |= MouseButtons.Button4;
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if (Glfw.GetMouseButton(window, MouseButton.Button5) == InputState.Press)
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btns |= MouseButtons.Button5;
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return btns;
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}
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public delegate void ShouldCloseCallback();
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public ShouldCloseCallback Closing = delegate () { };
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public MouseButtonCallback Click = delegate (IntPtr window, MouseButton button, InputState state, ModifierKeys modifiers) { };
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public MouseCallback Move = delegate (IntPtr window, double x, double y) { };
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public SizeCallback Resize = delegate (IntPtr window, int width, int height) { };
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public MouseCallback Scroll = delegate (IntPtr window, double x, double y) { };
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public MouseEnterCallback Leave = delegate (IntPtr window, bool entered) { };
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public void SetTitle(string title) {
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Glfw.SetWindowTitle(window, title);
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}
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public void PollEvents() {
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Glfw.PollEvents();
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if (Glfw.WindowShouldClose(window))
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Closing();
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}
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public unsafe void SetBitmap(Bitmap bmp)
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{
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gl.UseProgram(shader_program);
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gl.Viewport(new Size(bmp.Width, bmp.Height));
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gl.ActiveTexture(Silk.NET.OpenGL.GLEnum.Texture0);
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gl.BindTexture(Silk.NET.OpenGL.GLEnum.Texture2D, texture);
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BitmapData data = bmp.LockBits(new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
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gl.TexImage2D(
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Silk.NET.OpenGL.GLEnum.Texture2D,
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0,
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InternalFormat.Rgba8,
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(uint)bmp.Width,
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(uint)bmp.Height,
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0,
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Silk.NET.OpenGL.GLEnum.Bgra,
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Silk.NET.OpenGL.GLEnum.UnsignedByte,
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(void*)data.Scan0
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);
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bmp.UnlockBits(data);
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int res_pos = gl.GetUniformLocation(shader_program, "res");
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gl.Uniform2(res_pos, (float)bmp.Width, (float)bmp.Height);
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gl.BindBuffer(GLEnum.ArrayBuffer, vertex_buf);
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uint vert_pos = (uint)gl.GetAttribLocation(shader_program, "vertPos");
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gl.EnableVertexAttribArray(vert_pos);
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gl.BindVertexArray(vao);
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gl.VertexAttribPointer(
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vert_pos,
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2,
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GLEnum.Float,
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false,
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0,
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IntPtr.Zero
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);
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gl.DrawArrays(GLEnum.TriangleStrip, 0, 4);
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Glfw.SwapBuffers(window);
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}
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public unsafe void BitmapSetting(Bitmap bmp)
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{
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Glfw.WindowHint(Hint.ClientApi, ClientApi.OpenGL);
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Glfw.WindowHint(Hint.ContextVersionMajor, 3);
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Glfw.WindowHint(Hint.ContextVersionMinor, 3);
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Glfw.WindowHint(Hint.OpenglProfile, Profile.Core);
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Glfw.WindowHint(Hint.Doublebuffer, true);
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Glfw.WindowHint(Hint.Decorated, true);
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Glfw.WindowHint(Hint.OpenglForwardCompatible, true);
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window = Glfw.CreateWindow(bmp.Width, bmp.Height, "yayy", Monitor.None, GLFW.Window.None);
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Glfw.SetWindowSizeCallback(window, Resize);
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Glfw.SetMouseButtonCallback(window, Click);
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Glfw.SetCursorPositionCallback(window, Move);
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Glfw.SetScrollCallback(window, Scroll);
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Glfw.SetCursorEnterCallback(window, Leave);
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GCHandle handle = GCHandle.Alloc(this);
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Glfw.SetWindowUserPointer(window, GCHandle.ToIntPtr(handle));
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Glfw.MakeContextCurrent(window);
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gl = Silk.NET.OpenGL.GL.GetApi(Glfw.GetProcAddress);
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string vertexShaderSource =
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@"
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#version 100
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precision mediump float;
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attribute vec2 vertPos;
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void main()
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{
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gl_Position = vec4(vertPos, 0.0, 1.0);
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}
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";
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string fragmentShaderSource =
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@"
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#version 100
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precision mediump float;
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uniform sampler2D sTexture;
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uniform vec2 res;
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void main()
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{
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vec2 tc = gl_FragCoord.xy / res;
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tc.y = 1.0 - tc.y;
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gl_FragColor = texture2D(sTexture, tc);
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}
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";
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uint vertexShader = gl.CreateShader(Silk.NET.OpenGL.GLEnum.VertexShader);
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gl.ShaderSource(vertexShader, vertexShaderSource);
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gl.CompileShader(vertexShader);
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uint fragmentShader = gl.CreateShader(Silk.NET.OpenGL.GLEnum.FragmentShader);
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gl.ShaderSource(fragmentShader, fragmentShaderSource);
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gl.CompileShader(fragmentShader);
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shader_program = gl.CreateProgram();
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gl.AttachShader(shader_program, vertexShader);
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gl.AttachShader(shader_program, fragmentShader);
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gl.LinkProgram(shader_program);
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System.Diagnostics.Debug.WriteLine(gl.GetShaderInfoLog(fragmentShader));
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System.Diagnostics.Debug.WriteLine(gl.GetShaderInfoLog(vertexShader));
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System.Diagnostics.Debug.WriteLine(gl.GetProgramInfoLog(shader_program));
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gl.UseProgram(shader_program);
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gl.Uniform1(gl.GetUniformLocation(shader_program, "sTexture"), 0);
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texture = gl.GenTexture();
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gl.ActiveTexture(Silk.NET.OpenGL.GLEnum.Texture0);
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gl.BindTexture(Silk.NET.OpenGL.GLEnum.Texture2D, texture);
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gl.TexParameterI(Silk.NET.OpenGL.GLEnum.Texture2D, Silk.NET.OpenGL.GLEnum.TextureWrapS, new int[] {(int)TextureWrapMode.ClampToEdge});
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gl.TexParameterI(Silk.NET.OpenGL.GLEnum.Texture2D, Silk.NET.OpenGL.GLEnum.TextureWrapT, new int[] {(int)TextureWrapMode.ClampToEdge});
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gl.TexParameterI(Silk.NET.OpenGL.GLEnum.Texture2D, Silk.NET.OpenGL.GLEnum.TextureMagFilter, new int[] {(int)TextureMagFilter.Nearest});
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gl.TexParameterI(Silk.NET.OpenGL.GLEnum.Texture2D, Silk.NET.OpenGL.GLEnum.TextureMinFilter, new int[] {(int)TextureMinFilter.Nearest});
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float[] buf = { 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, -1.0f };
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vertex_buf = gl.GenBuffer();
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gl.BindBuffer(Silk.NET.OpenGL.GLEnum.ArrayBuffer, vertex_buf);
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fixed (float* buf_ = buf) gl.BufferData(Silk.NET.OpenGL.GLEnum.ArrayBuffer, (uint)(sizeof(float) * buf.Length), buf_, Silk.NET.OpenGL.GLEnum.StaticDraw);
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vao = gl.GenVertexArray();
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}
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}
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} |