mirror of
https://github.com/ClassiCube/ClassiCube.git
synced 2025-10-05 12:07:25 -04:00
280 lines
8.2 KiB
C#
280 lines
8.2 KiB
C#
using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Runtime.InteropServices;
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using OpenTK;
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using OpenTK.Graphics.OpenGL;
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namespace ClassicalSharp.GraphicsAPI {
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public abstract class IGraphicsApi {
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/// <summary> Maximum supported length of a dimension
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/// (i.e. max width and max height) in a 2D texture. </summary>
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public abstract int MaxTextureDimensions { get; }
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public abstract bool Texturing { set; }
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public virtual int LoadTexture( string path ) {
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if( !File.Exists( path ) ) {
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throw new FileNotFoundException( path + " not found" );
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}
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using( Bitmap bmp = new Bitmap( path ) ) {
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return LoadTexture( bmp );
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}
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}
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public virtual int LoadTexture( Bitmap bmp ) {
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Rectangle rec = new Rectangle( 0, 0, bmp.Width, bmp.Height );
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BitmapData data = bmp.LockBits( rec, ImageLockMode.ReadOnly, bmp.PixelFormat );
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int texId = LoadTexture( data.Width, data.Height, data.Scan0 );
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bmp.UnlockBits( data );
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return texId;
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}
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public virtual int LoadTexture( FastBitmap bmp ) {
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if( !bmp.IsLocked )
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bmp.LockBits();
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int texId = LoadTexture( bmp.Width, bmp.Height, bmp.Scan0 );
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bmp.UnlockBits();
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return texId;
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}
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public abstract int LoadTexture( int width, int height, IntPtr scan0 );
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public abstract void Bind2DTexture( int texId );
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public abstract void DeleteTexture( ref int texId );
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public virtual void DeleteTexture( ref Texture texture ) {
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DeleteTexture( ref texture.ID );
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}
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public abstract bool IsValidTexture( int texId );
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/// <summary> Whether fog is currently enabled. </summary>
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public abstract bool Fog { set; }
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public abstract void SetFogColour( FastColour col );
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public abstract void SetFogDensity( float value );
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public abstract void SetFogStart( float value );
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public abstract void SetFogEnd( float value );
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public abstract void SetFogMode( Fog fogMode );
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public abstract bool FaceCulling { set; }
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/// <summary> Sets the alpha test function that is used when alpha testing is enabled. </summary>
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public abstract void AlphaTestFunc( CompareFunc func, float value );
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/// <summary> Whether alpha testing is currently enabled. </summary>
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public abstract bool AlphaTest { set; }
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/// <summary> Whether alpha blending is currently enabled. </summary>
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public abstract bool AlphaBlending { set; }
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/// <summary> Sets the alpha blend function that isused when alpha blending is enabled. </summary>
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public abstract void AlphaBlendFunc( BlendFunc srcFunc, BlendFunc destFunc );
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/// <summary> Clears the underlying back and/or front buffer. </summary>
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public abstract void Clear();
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/// <summary> Sets the colour the screen is cleared to when Clear() is called. </summary>
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public abstract void ClearColour( FastColour col );
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public abstract bool ColourWrite { set; }
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public abstract void DepthTestFunc( CompareFunc func );
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/// <summary> Whether depth testing is currently enabled. </summary>
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public abstract bool DepthTest { set; }
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/// <summary> Whether writing to the depth buffer is enabled. </summary>
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public abstract bool DepthWrite { set; }
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public abstract int CreateDynamicVb( VertexFormat format, int maxVertices );
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public abstract void DrawDynamicVb<T>( DrawMode mode, int vb, T[] vertices, VertexFormat format, int count ) where T : struct;
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public virtual int InitVb<T>( T[] vertices, VertexFormat format ) where T : struct {
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return InitVb( vertices, format, vertices.Length );
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}
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public abstract int InitVb<T>( T[] vertices, VertexFormat format, int count ) where T : struct;
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public abstract int InitIb( ushort[] indices, int indicesCount );
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public abstract bool IsValidVb( int vb );
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public abstract bool IsValidIb( int ib );
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public abstract void DeleteDynamicVb( int id );
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public abstract void DeleteVb( int id );
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public abstract void DeleteIb( int ib );
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public abstract void DrawVb( DrawMode mode, VertexFormat format, int id, int startVertex, int verticesCount );
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public abstract void BeginVbBatch( VertexFormat format );
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public abstract void DrawVbBatch( DrawMode mode, int id, int startVertex, int verticesCount );
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public abstract void BeginIndexedVbBatch();
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public abstract void DrawIndexedVbBatch( DrawMode mode, int vb, int ib, int indicesCount,
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int startVertex, int startIndex );
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public abstract void EndIndexedVbBatch();
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protected static int[] strideSizes = { 20, 16, 24 };
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public abstract void SetMatrixMode( MatrixType mode );
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public abstract void LoadMatrix( ref Matrix4 matrix );
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public virtual void LoadIdentityMatrix() {
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Matrix4 identity = Matrix4.Identity;
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LoadMatrix( ref identity );
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}
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public abstract void MultiplyMatrix( ref Matrix4 matrix );
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public abstract void PushMatrix();
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public abstract void PopMatrix();
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public abstract void TakeScreenshot( string output, Size size );
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public virtual void PrintApiSpecificInfo() {
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}
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public abstract void BeginFrame( Game game );
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public abstract void EndFrame( Game game );
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public abstract void SetVSync( Game game, bool value );
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public abstract void OnWindowResize( Game game );
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protected void InitDynamicBuffers() {
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quadVb = CreateDynamicVb( VertexFormat.Pos3fCol4b, 4 );
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texVb = CreateDynamicVb( VertexFormat.Pos3fTex2f, 4 );
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}
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public virtual void Dispose() {
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DeleteDynamicVb( quadVb );
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DeleteDynamicVb( texVb );
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}
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VertexPos3fCol4b[] quadVertices = new VertexPos3fCol4b[4];
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int quadVb;
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public virtual void Draw2DQuad( float x, float y, float width, float height, FastColour col ) {
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quadVertices[0] = new VertexPos3fCol4b( x + width, y, 0, col );
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quadVertices[1] = new VertexPos3fCol4b( x + width, y + height, 0, col );
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quadVertices[2] = new VertexPos3fCol4b( x, y, 0, col );
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quadVertices[3] = new VertexPos3fCol4b( x, y + height, 0, col );
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DrawDynamicVb( DrawMode.TriangleStrip, quadVb, quadVertices, VertexFormat.Pos3fCol4b, 4 );
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}
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internal VertexPos3fTex2f[] texVerts = new VertexPos3fTex2f[4];
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internal int texVb;
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public virtual void Draw2DTexture( ref Texture tex ) {
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float x1 = tex.X1, y1 = tex.Y1, x2 = tex.X2, y2 = tex.Y2;
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#if USE_DX
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// NOTE: see "https://msdn.microsoft.com/en-us/library/windows/desktop/bb219690(v=vs.85).aspx",
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// i.e. the msdn article called "Directly Mapping Texels to Pixels (Direct3D 9)" for why we have to do this.
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x1 -= 0.5f;
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x2 -= 0.5f;
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y1 -= 0.5f;
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y2 -= 0.5f;
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#endif
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// Have to order them this way because it's a triangle strip.
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texVerts[0] = new VertexPos3fTex2f( x2, y1, 0, tex.U2, tex.V1 );
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texVerts[1] = new VertexPos3fTex2f( x2, y2, 0, tex.U2, tex.V2 );
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texVerts[2] = new VertexPos3fTex2f( x1, y1, 0, tex.U1, tex.V1 );
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texVerts[3] = new VertexPos3fTex2f( x1, y2, 0, tex.U1, tex.V2 );
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DrawDynamicVb( DrawMode.TriangleStrip, texVb, texVerts, VertexFormat.Pos3fTex2f, 4 );
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}
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public void Mode2D( float width, float height ) {
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SetMatrixMode( MatrixType.Projection );
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PushMatrix();
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LoadIdentityMatrix();
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DepthTest = false;
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LoadOrthoMatrix( width, height );
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SetMatrixMode( MatrixType.Modelview );
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PushMatrix();
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LoadIdentityMatrix();
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AlphaBlending = true;
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}
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protected virtual void LoadOrthoMatrix( float width, float height ) {
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Matrix4 matrix = Matrix4.CreateOrthographicOffCenter( 0, width, height, 0, 0, 1 );
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LoadMatrix( ref matrix );
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}
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public void Mode3D() {
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// Get rid of orthographic 2D matrix.
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SetMatrixMode( MatrixType.Projection );
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PopMatrix();
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SetMatrixMode( MatrixType.Modelview );
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PopMatrix();
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DepthTest = true;
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AlphaBlending = false;
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}
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}
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public enum VertexFormat {
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Pos3fTex2f = 0,
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Pos3fCol4b = 1,
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Pos3fTex2fCol4b = 2,
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}
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public enum DrawMode {
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Triangles = 0,
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Lines = 1,
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TriangleStrip = 2,
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}
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public enum CompareFunc {
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Always = 0,
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NotEqual = 1,
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Never = 2,
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Less = 3,
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LessEqual = 4,
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Equal = 5,
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GreaterEqual = 6,
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Greater = 7,
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}
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public enum BlendFunc {
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Zero = 0,
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One = 1,
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SourceAlpha = 2,
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InvSourceAlpha = 3,
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DestAlpha = 4,
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InvDestAlpha = 5,
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}
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public enum Fog {
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Linear = 0,
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Exp = 1,
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Exp2 = 2,
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}
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public enum MatrixType {
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Projection = 0,
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Modelview = 1,
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Texture = 2,
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}
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} |