497 lines
14 KiB
C#
497 lines
14 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenRA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
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*/
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#endregion
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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.IO;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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using OpenRA.FileFormats.Graphics;
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using Tao.Cg;
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using Tao.OpenGl;
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using Tao.Sdl;
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[assembly: Renderer( typeof( OpenRA.GlRenderer.GraphicsDevice ))]
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namespace OpenRA.GlRenderer
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{
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public class GraphicsDevice : IGraphicsDevice
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{
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Size windowSize;
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internal IntPtr cgContext;
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internal int vertexProfile, fragmentProfile;
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IntPtr surf;
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public Size WindowSize { get { return windowSize; } }
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internal static void CheckGlError()
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{
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var n = Gl.glGetError();
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if (n != Gl.GL_NO_ERROR)
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throw new InvalidOperationException("GL Error");
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}
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public GraphicsDevice(int width, int height, bool windowed, bool vsync)
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{
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Sdl.SDL_Init(Sdl.SDL_INIT_NOPARACHUTE | Sdl.SDL_INIT_VIDEO);
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Sdl.SDL_GL_SetAttribute(Sdl.SDL_GL_DOUBLEBUFFER, 1);
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Sdl.SDL_GL_SetAttribute(Sdl.SDL_GL_RED_SIZE, 8);
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Sdl.SDL_GL_SetAttribute(Sdl.SDL_GL_GREEN_SIZE, 8);
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Sdl.SDL_GL_SetAttribute(Sdl.SDL_GL_BLUE_SIZE, 8);
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Sdl.SDL_GL_SetAttribute(Sdl.SDL_GL_ALPHA_SIZE, 0);
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if (Environment.OSVersion.Platform == PlatformID.Win32NT)
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{
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// pseudo-fullscreen, for sane debugging.
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Environment.SetEnvironmentVariable("SDL_VIDEO_WINDOW_POS", "0,0");
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surf = Sdl.SDL_SetVideoMode(width, height, 0, Sdl.SDL_NOFRAME | Sdl.SDL_OPENGL | (windowed ? 0 : Sdl.SDL_FULLSCREEN));
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}
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else
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{
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// OSX doesn't like this, due to quirks of their WM.
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surf = Sdl.SDL_SetVideoMode(width, height, 0, Sdl.SDL_OPENGL | (windowed ? 0 : Sdl.SDL_FULLSCREEN));
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}
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Sdl.SDL_WM_SetCaption("OpenRA", "OpenRA");
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Sdl.SDL_ShowCursor(0);
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Sdl.SDL_EnableUNICODE(1);
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Sdl.SDL_EnableKeyRepeat(Sdl.SDL_DEFAULT_REPEAT_INTERVAL, Sdl.SDL_DEFAULT_REPEAT_DELAY);
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CheckGlError();
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windowSize = new Size(width, height);
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cgContext = Cg.cgCreateContext();
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Cg.cgSetErrorCallback(CgErrorCallback);
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CgGl.cgGLRegisterStates(cgContext);
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CgGl.cgGLSetManageTextureParameters(cgContext, true);
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vertexProfile = CgGl.cgGLGetLatestProfile(CgGl.CG_GL_VERTEX);
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fragmentProfile = CgGl.cgGLGetLatestProfile(CgGl.CG_GL_FRAGMENT);
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Console.WriteLine("VP Profile: " + vertexProfile);
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Console.WriteLine("FP Profile: " + fragmentProfile);
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Gl.glEnableClientState(Gl.GL_VERTEX_ARRAY);
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CheckGlError();
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Gl.glEnableClientState(Gl.GL_TEXTURE_COORD_ARRAY);
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CheckGlError();
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}
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static Cg.CGerrorCallbackFuncDelegate CgErrorCallback = () =>
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{
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var err = Cg.cgGetError();
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var str = Cg.cgGetErrorString(err);
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throw new InvalidOperationException(
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string.Format("CG Error: {0}: {1}", err, str));
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};
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public void EnableScissor(int left, int top, int width, int height)
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{
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if (width < 0) width = 0;
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if (height < 0) height = 0;
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Gl.glScissor(left, windowSize.Height - (top + height), width, height);
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CheckGlError();
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Gl.glEnable(Gl.GL_SCISSOR_TEST);
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CheckGlError();
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}
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public void DisableScissor()
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{
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Gl.glDisable(Gl.GL_SCISSOR_TEST);
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CheckGlError();
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}
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public void Begin() { }
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public void End() { }
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public void Clear(Color c)
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{
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Gl.glClearColor(0, 0, 0, 0);
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CheckGlError();
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Gl.glClear(Gl.GL_COLOR_BUFFER_BIT);
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CheckGlError();
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}
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MouseButtons lastButtonBits = (MouseButtons)0;
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static MouseButtons MakeButton(byte b)
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{
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return b == Sdl.SDL_BUTTON_LEFT ? MouseButtons.Left
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: b == Sdl.SDL_BUTTON_RIGHT ? MouseButtons.Right
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: b == Sdl.SDL_BUTTON_MIDDLE ? MouseButtons.Middle
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: 0;
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}
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static Modifiers MakeModifiers(int raw)
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{
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return ((raw & Sdl.KMOD_ALT) != 0 ? Modifiers.Alt : 0)
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| ((raw & Sdl.KMOD_CTRL) != 0 ? Modifiers.Ctrl : 0)
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| ((raw & Sdl.KMOD_SHIFT) != 0 ? Modifiers.Shift : 0);
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}
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public void Present()
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{
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Sdl.SDL_GL_SwapBuffers();
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var mods = MakeModifiers(Sdl.SDL_GetModState());
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Game.HandleModifierKeys(mods);
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Sdl.SDL_Event e;
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while (Sdl.SDL_PollEvent(out e) != 0)
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{
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switch (e.type)
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{
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case Sdl.SDL_QUIT:
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OpenRA.Game.Exit();
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break;
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case Sdl.SDL_MOUSEBUTTONDOWN:
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{
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var button = MakeButton(e.button.button);
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lastButtonBits |= button;
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Game.DispatchMouseInput(MouseInputEvent.Down,
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new MouseEventArgs(button, 1, e.button.x, e.button.y, 0),
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mods);
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} break;
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case Sdl.SDL_MOUSEBUTTONUP:
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{
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var button = MakeButton(e.button.button);
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lastButtonBits &= ~button;
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Game.DispatchMouseInput(MouseInputEvent.Up,
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new MouseEventArgs(button, 1, e.button.x, e.button.y, 0),
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mods);
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} break;
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case Sdl.SDL_MOUSEMOTION:
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{
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Game.DispatchMouseInput(MouseInputEvent.Move,
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new MouseEventArgs(lastButtonBits, 0, e.motion.x, e.motion.y, 0),
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mods);
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} break;
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case Sdl.SDL_KEYDOWN:
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{
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switch (e.key.keysym.sym)
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{
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case Sdl.SDLK_UP: Game.HandleArrowKeyScroll("up", true); break;
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case Sdl.SDLK_LEFT: Game.HandleArrowKeyScroll("left", true); break;
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case Sdl.SDLK_DOWN: Game.HandleArrowKeyScroll("down", true); break;
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case Sdl.SDLK_RIGHT: Game.HandleArrowKeyScroll("right", true); break;
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}
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if (e.key.keysym.unicode != 0)
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Game.HandleKeyPress(new KeyPressEventArgs((char)e.key.keysym.unicode), mods);
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else if (mods != 0)
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{
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var keyName = Sdl.SDL_GetKeyName(e.key.keysym.sym);
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if (keyName.Length == 1)
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Game.HandleKeyPress(new KeyPressEventArgs(keyName[0]), mods);
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else if (keyName == "f4" && ((mods & Modifiers.Alt) != 0))
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OpenRA.Game.Exit();
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}
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} break;
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case Sdl.SDL_KEYUP:
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{
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switch (e.key.keysym.sym)
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{
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case Sdl.SDLK_UP: Game.HandleArrowKeyScroll("up", false); break;
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case Sdl.SDLK_LEFT: Game.HandleArrowKeyScroll("left", false); break;
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case Sdl.SDLK_DOWN: Game.HandleArrowKeyScroll("down", false); break;
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case Sdl.SDLK_RIGHT: Game.HandleArrowKeyScroll("right", false); break;
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}
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} break;
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}
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}
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CheckGlError();
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}
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public void DrawIndexedPrimitives(PrimitiveType pt, Range<int> vertices, Range<int> indices)
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{
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Gl.glDrawElements(ModeFromPrimitiveType(pt), indices.End - indices.Start, Gl.GL_UNSIGNED_SHORT, new IntPtr(indices.Start * 2));
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CheckGlError();
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}
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public void DrawIndexedPrimitives(PrimitiveType pt, int numVerts, int numPrimitives)
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{
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Gl.glDrawElements(ModeFromPrimitiveType(pt), numPrimitives * IndicesPerPrimitive(pt), Gl.GL_UNSIGNED_SHORT, IntPtr.Zero);
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CheckGlError();
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}
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static int ModeFromPrimitiveType(PrimitiveType pt)
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{
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switch (pt)
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{
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case PrimitiveType.PointList: return Gl.GL_POINTS;
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case PrimitiveType.LineList: return Gl.GL_LINES;
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case PrimitiveType.TriangleList: return Gl.GL_TRIANGLES;
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}
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throw new NotImplementedException();
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}
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static int IndicesPerPrimitive(PrimitiveType pt)
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{
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switch (pt)
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{
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case PrimitiveType.PointList: return 1;
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case PrimitiveType.LineList: return 2;
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case PrimitiveType.TriangleList: return 3;
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}
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throw new NotImplementedException();
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}
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#region IGraphicsDevice Members
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public IVertexBuffer<Vertex> CreateVertexBuffer(int size)
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{
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return new VertexBuffer<Vertex>(this, size);
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}
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public IIndexBuffer CreateIndexBuffer(int size)
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{
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return new IndexBuffer(this, size);
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}
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public ITexture CreateTexture(Bitmap bitmap)
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{
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return new Texture(this, bitmap);
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}
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public IShader CreateShader(Stream stream)
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{
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return new Shader(this, stream);
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}
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#endregion
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}
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public class VertexBuffer<T> : IVertexBuffer<T>, IDisposable
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where T : struct
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{
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int buffer;
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public VertexBuffer(GraphicsDevice dev, int size)
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{
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Gl.glGenBuffers(1, out buffer);
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GraphicsDevice.CheckGlError();
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}
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public void SetData(T[] data)
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{
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Bind();
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Gl.glBufferData(Gl.GL_ARRAY_BUFFER,
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new IntPtr(Marshal.SizeOf(typeof(T)) * data.Length), data, Gl.GL_DYNAMIC_DRAW);
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GraphicsDevice.CheckGlError();
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}
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public void Bind()
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{
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Gl.glBindBuffer(Gl.GL_ARRAY_BUFFER, buffer);
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GraphicsDevice.CheckGlError();
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Gl.glVertexPointer(3, Gl.GL_FLOAT, Marshal.SizeOf(typeof(T)), IntPtr.Zero);
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GraphicsDevice.CheckGlError();
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Gl.glTexCoordPointer(4, Gl.GL_FLOAT, Marshal.SizeOf(typeof(T)), new IntPtr(12));
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GraphicsDevice.CheckGlError();
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}
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bool disposed;
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public void Dispose()
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{
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if (disposed) return;
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GC.SuppressFinalize(this);
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Gl.glDeleteBuffers(1, ref buffer);
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GraphicsDevice.CheckGlError();
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disposed = true;
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}
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//~VertexBuffer() { Dispose(); }
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}
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public class IndexBuffer : IIndexBuffer, IDisposable
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{
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int buffer;
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public IndexBuffer(GraphicsDevice dev, int size)
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{
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Gl.glGenBuffers(1, out buffer);
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GraphicsDevice.CheckGlError();
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}
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public void SetData(ushort[] data)
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{
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Bind();
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Gl.glBufferData(Gl.GL_ELEMENT_ARRAY_BUFFER,
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new IntPtr(2 * data.Length), data, Gl.GL_DYNAMIC_DRAW);
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GraphicsDevice.CheckGlError();
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}
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public void Bind()
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{
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Gl.glBindBuffer(Gl.GL_ELEMENT_ARRAY_BUFFER, buffer);
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GraphicsDevice.CheckGlError();
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}
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bool disposed;
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public void Dispose()
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{
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if (disposed) return;
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GC.SuppressFinalize(this);
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Gl.glDeleteBuffers(1, ref buffer);
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GraphicsDevice.CheckGlError();
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disposed = true;
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}
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//~IndexBuffer() { Dispose(); }
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}
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public class Shader : IShader
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{
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IntPtr effect;
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IntPtr technique;
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GraphicsDevice dev;
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public Shader(GraphicsDevice dev, Stream s)
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{
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this.dev = dev;
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string code;
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using (var file = new StreamReader(s))
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code = file.ReadToEnd();
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effect = Cg.cgCreateEffect(dev.cgContext, code, null);
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if (effect == IntPtr.Zero)
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{
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var err = Cg.cgGetErrorString(Cg.cgGetError());
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var results = Cg.cgGetLastListing(dev.cgContext);
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throw new InvalidOperationException(
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string.Format("Cg compile failed ({0}):\n{1}", err, results));
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}
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technique = Cg.cgGetFirstTechnique(effect);
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if (technique == IntPtr.Zero)
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throw new InvalidOperationException("No techniques");
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while (Cg.cgValidateTechnique(technique) == 0)
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{
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technique = Cg.cgGetNextTechnique(technique);
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if (technique == IntPtr.Zero)
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throw new InvalidOperationException("No valid techniques");
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}
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}
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public void Render(Action a)
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{
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CgGl.cgGLEnableProfile(dev.vertexProfile);
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CgGl.cgGLEnableProfile(dev.fragmentProfile);
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var pass = Cg.cgGetFirstPass(technique);
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while (pass != IntPtr.Zero)
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{
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Cg.cgSetPassState(pass);
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a();
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Cg.cgResetPassState(pass);
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pass = Cg.cgGetNextPass(pass);
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}
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CgGl.cgGLDisableProfile(dev.fragmentProfile);
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CgGl.cgGLDisableProfile(dev.vertexProfile);
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}
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public void SetValue(string name, ITexture t)
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{
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var texture = (Texture)t;
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var param = Cg.cgGetNamedEffectParameter(effect, name);
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if (param != IntPtr.Zero && texture != null)
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CgGl.cgGLSetupSampler(param, texture.texture);
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}
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public void SetValue(string name, float x, float y)
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{
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var param = Cg.cgGetNamedEffectParameter(effect, name);
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if (param != IntPtr.Zero)
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CgGl.cgGLSetParameter2f(param, x, y);
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}
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public void Commit() { }
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}
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public class Texture : ITexture
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{
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internal int texture;
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public Texture(GraphicsDevice dev, Bitmap bitmap)
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{
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Gl.glGenTextures(1, out texture);
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GraphicsDevice.CheckGlError();
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SetData(bitmap);
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}
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public void SetData(Bitmap bitmap)
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{
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if (!IsPowerOf2(bitmap.Width) || !IsPowerOf2(bitmap.Height))
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{
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//throw new InvalidOperationException( "non-power-of-2-texture" );
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bitmap = new Bitmap(bitmap, new Size(NextPowerOf2(bitmap.Width), NextPowerOf2(bitmap.Height)));
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}
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Gl.glBindTexture(Gl.GL_TEXTURE_2D, texture);
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GraphicsDevice.CheckGlError();
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var bits = bitmap.LockBits(
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new Rectangle(0, 0, bitmap.Width, bitmap.Height),
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ImageLockMode.ReadOnly,
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PixelFormat.Format32bppArgb);
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_BASE_LEVEL, 0);
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GraphicsDevice.CheckGlError();
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAX_LEVEL, 0);
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GraphicsDevice.CheckGlError();
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Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, bits.Width, bits.Height,
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0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bits.Scan0); // todo: weird strides
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GraphicsDevice.CheckGlError();
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bitmap.UnlockBits(bits);
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}
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bool IsPowerOf2(int v)
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{
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return (v & (v - 1)) == 0;
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}
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int NextPowerOf2(int v)
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{
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--v;
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v |= v >> 1;
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v |= v >> 2;
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v |= v >> 4;
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v |= v >> 8;
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++v;
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return v;
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}
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}
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}
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