[692] | 1 | /*
|
---|
| 2 | -----------------------------------------------------------------------------
|
---|
| 3 | This source file is part of OGRE
|
---|
| 4 | (Object-oriented Graphics Rendering Engine)
|
---|
| 5 | For the latest info, see http://www.ogre3d.org/
|
---|
| 6 |
|
---|
| 7 | Copyright (c) 2000-2005 The OGRE Team
|
---|
| 8 | Also see acknowledgements in Readme.html
|
---|
| 9 |
|
---|
| 10 | This program is free software; you can redistribute it and/or modify it under
|
---|
| 11 | the terms of the GNU Lesser General Public License as published by the Free Software
|
---|
| 12 | Foundation; either version 2 of the License, or (at your option) any later
|
---|
| 13 | version.
|
---|
| 14 |
|
---|
| 15 | This program is distributed in the hope that it will be useful, but WITHOUT
|
---|
| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
---|
| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
|
---|
| 18 |
|
---|
| 19 | You should have received a copy of the GNU Lesser General Public License along with
|
---|
| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
---|
| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to
|
---|
| 22 | http://www.gnu.org/copyleft/lesser.txt.
|
---|
| 23 | -----------------------------------------------------------------------------
|
---|
| 24 | */
|
---|
| 25 | #include "OgreStableHeaders.h"
|
---|
| 26 |
|
---|
| 27 | #include "OgreException.h"
|
---|
| 28 | #include "OgreLogManager.h"
|
---|
| 29 | #include "OgreRoot.h"
|
---|
| 30 | #include "OgreStringConverter.h"
|
---|
| 31 |
|
---|
| 32 | #include "OgreGLRenderSystem.h"
|
---|
| 33 |
|
---|
| 34 | #include "OgreGLXRenderTexture.h"
|
---|
| 35 | #include "OgreGLXContext.h"
|
---|
| 36 | #include "OgreGLXUtils.h"
|
---|
| 37 |
|
---|
| 38 | #include <iostream>
|
---|
| 39 |
|
---|
| 40 | /// ATI: GLX_ATI_pixel_format_float
|
---|
| 41 | #ifndef GLX_RGBA_FLOAT_ATI_BIT
|
---|
| 42 | #define GLX_RGBA_FLOAT_ATI_BIT 0x00000100
|
---|
| 43 | #endif
|
---|
| 44 |
|
---|
| 45 | /// ARB: GLX_ARB_fbconfig_float
|
---|
| 46 | #ifndef GLX_RGBA_FLOAT_BIT
|
---|
| 47 | #define GLX_RGBA_FLOAT_BIT 0x00000004
|
---|
| 48 | #endif
|
---|
| 49 |
|
---|
| 50 | #ifndef GLX_RGBA_FLOAT_TYPE
|
---|
| 51 | #define GLX_RGBA_FLOAT_TYPE 0x20B9
|
---|
| 52 | #endif
|
---|
| 53 |
|
---|
| 54 |
|
---|
| 55 | namespace Ogre
|
---|
| 56 | {
|
---|
| 57 | GLXPBuffer::GLXPBuffer(PixelComponentType format, size_t width, size_t height):
|
---|
| 58 | GLPBuffer(format, width, height),
|
---|
| 59 | _hPBuffer(0),
|
---|
| 60 | mContext(0)
|
---|
| 61 | {
|
---|
| 62 | createPBuffer();
|
---|
| 63 | // Create context
|
---|
| 64 | mContext = new GLXContext(_pDpy, _hPBuffer, _hGLContext);
|
---|
| 65 | }
|
---|
| 66 |
|
---|
| 67 | GLContext *GLXPBuffer::getContext()
|
---|
| 68 | {
|
---|
| 69 | return mContext;
|
---|
| 70 | }
|
---|
| 71 |
|
---|
| 72 | void GLXPBuffer::createPBuffer() {
|
---|
| 73 | //LogManager::getSingleton().logMessage(
|
---|
| 74 | //"GLXPBuffer::Creating PBuffer"
|
---|
| 75 | //);
|
---|
| 76 | _pDpy = glXGetCurrentDisplay();
|
---|
| 77 | ::GLXContext context = glXGetCurrentContext();
|
---|
| 78 | int screen = DefaultScreen(_pDpy);
|
---|
| 79 | int attribs[50], ideal[50];
|
---|
| 80 | int attrib;
|
---|
| 81 |
|
---|
| 82 | // Process format
|
---|
| 83 | int bits=0;
|
---|
| 84 | bool isFloat=false;
|
---|
| 85 | switch(mFormat)
|
---|
| 86 | {
|
---|
| 87 | case PCT_BYTE:
|
---|
| 88 | bits=8; isFloat=false;
|
---|
| 89 | break;
|
---|
| 90 | case PCT_SHORT:
|
---|
| 91 | bits=16; isFloat=false;
|
---|
| 92 | break;
|
---|
| 93 | case PCT_FLOAT16:
|
---|
| 94 | bits=16; isFloat=true;
|
---|
| 95 | break;
|
---|
| 96 | case PCT_FLOAT32:
|
---|
| 97 | bits=32; isFloat=true;
|
---|
| 98 | break;
|
---|
| 99 | default: break;
|
---|
| 100 | };
|
---|
| 101 | RTFType floatBuffer = RTF_NONE;
|
---|
| 102 | if(isFloat)
|
---|
| 103 | {
|
---|
| 104 | floatBuffer = detectRTFType();
|
---|
| 105 | if(floatBuffer == RTF_NONE || floatBuffer == RTF_NV)
|
---|
| 106 | {
|
---|
| 107 | OGRE_EXCEPT(Exception::UNIMPLEMENTED_FEATURE, "Floating point PBuffers not supported on this hardware", "GLRenderTexture::createPBuffer");
|
---|
| 108 | }
|
---|
| 109 | }
|
---|
| 110 |
|
---|
| 111 | // Create base required format description
|
---|
| 112 | attrib = 0;
|
---|
| 113 | if (floatBuffer == RTF_ATI) {
|
---|
| 114 | attribs[attrib++] = GLX_RENDER_TYPE;
|
---|
| 115 | attribs[attrib++] = GLX_RGBA_FLOAT_ATI_BIT;
|
---|
| 116 | }
|
---|
| 117 | else if (floatBuffer == RTF_ARB)
|
---|
| 118 | {
|
---|
| 119 | attribs[attrib++] = GLX_RENDER_TYPE;
|
---|
| 120 | attribs[attrib++] = GLX_RGBA_FLOAT_BIT;
|
---|
| 121 | }
|
---|
| 122 | else
|
---|
| 123 | {
|
---|
| 124 | attribs[attrib++] = GLX_RENDER_TYPE;
|
---|
| 125 | attribs[attrib++] = GLX_RGBA_BIT;
|
---|
| 126 | }
|
---|
| 127 | attribs[attrib++] = GLX_DRAWABLE_TYPE;
|
---|
| 128 | attribs[attrib++] = GLX_PBUFFER_BIT;
|
---|
| 129 | attribs[attrib++] = GLX_DOUBLEBUFFER;
|
---|
| 130 | attribs[attrib++] = 0;
|
---|
| 131 | /*
|
---|
| 132 | if (floatBuffer == RTF_NV) {
|
---|
| 133 | attribs[attrib++] = GLX_FLOAT_COMPONENTS_NV;
|
---|
| 134 | attribs[attrib++] = 1;
|
---|
| 135 | }
|
---|
| 136 | */
|
---|
| 137 | attribs[attrib++] = None;
|
---|
| 138 |
|
---|
| 139 | // Create "ideal" format description
|
---|
| 140 | attrib = 0;
|
---|
| 141 | ideal[attrib++] = GLX_RED_SIZE;
|
---|
| 142 | ideal[attrib++] = bits;
|
---|
| 143 | ideal[attrib++] = GLX_GREEN_SIZE;
|
---|
| 144 | ideal[attrib++] = bits;
|
---|
| 145 | ideal[attrib++] = GLX_BLUE_SIZE;
|
---|
| 146 | ideal[attrib++] = bits;
|
---|
| 147 | ideal[attrib++] = GLX_ALPHA_SIZE;
|
---|
| 148 | ideal[attrib++] = bits;
|
---|
| 149 | ideal[attrib++] = GLX_DEPTH_SIZE;
|
---|
| 150 | ideal[attrib++] = 24;
|
---|
| 151 | ideal[attrib++] = GLX_STENCIL_SIZE;
|
---|
| 152 | ideal[attrib++] = 8;
|
---|
| 153 | ideal[attrib++] = GLX_ACCUM_RED_SIZE;
|
---|
| 154 | ideal[attrib++] = 0; // Accumulation buffer not used
|
---|
| 155 | ideal[attrib++] = GLX_ACCUM_GREEN_SIZE;
|
---|
| 156 | ideal[attrib++] = 0; // Accumulation buffer not used
|
---|
| 157 | ideal[attrib++] = GLX_ACCUM_BLUE_SIZE;
|
---|
| 158 | ideal[attrib++] = 0; // Accumulation buffer not used
|
---|
| 159 | ideal[attrib++] = GLX_ACCUM_ALPHA_SIZE;
|
---|
| 160 | ideal[attrib++] = 0; // Accumulation buffer not used
|
---|
| 161 | ideal[attrib++] = None;
|
---|
| 162 |
|
---|
| 163 | // Create vector of existing config data formats
|
---|
| 164 | GLXFBConfig config = GLXUtils::findBestMatch(_pDpy, screen, attribs, ideal);
|
---|
| 165 |
|
---|
| 166 | // Create the pbuffer in the best matching format
|
---|
| 167 | attrib = 0;
|
---|
| 168 | attribs[attrib++] = GLX_PBUFFER_WIDTH;
|
---|
| 169 | attribs[attrib++] = mWidth; // Get from texture?
|
---|
| 170 | attribs[attrib++] = GLX_PBUFFER_HEIGHT;
|
---|
| 171 | attribs[attrib++] = mHeight; // Get from texture?
|
---|
| 172 | attribs[attrib++] = GLX_PRESERVED_CONTENTS;
|
---|
| 173 | attribs[attrib++] = 1;
|
---|
| 174 | attribs[attrib++] = None;
|
---|
| 175 |
|
---|
| 176 | FBConfigData configData(_pDpy, config);
|
---|
| 177 | LogManager::getSingleton().logMessage(
|
---|
| 178 | LML_NORMAL,
|
---|
| 179 | "GLXPBuffer::PBuffer chose format "+configData.toString());
|
---|
| 180 |
|
---|
| 181 | _hPBuffer = glXCreatePbuffer(_pDpy, config, attribs);
|
---|
| 182 | if (!_hPBuffer)
|
---|
| 183 | OGRE_EXCEPT(Exception::UNIMPLEMENTED_FEATURE, "glXCreatePbuffer() failed", "GLRenderTexture::createPBuffer");
|
---|
| 184 |
|
---|
| 185 | _hGLContext = glXCreateNewContext(_pDpy, config, GLX_RGBA_TYPE, context, True);
|
---|
| 186 | if (!_hGLContext)
|
---|
| 187 | OGRE_EXCEPT(Exception::UNIMPLEMENTED_FEATURE, "glXCreateContext() failed", "GLRenderTexture::createPBuffer");
|
---|
| 188 |
|
---|
| 189 | // Query real width and height
|
---|
| 190 | GLuint iWidth, iHeight;
|
---|
| 191 | glXQueryDrawable(_pDpy, _hPBuffer, GLX_WIDTH, &iWidth);
|
---|
| 192 | glXQueryDrawable(_pDpy, _hPBuffer, GLX_HEIGHT, &iHeight);
|
---|
| 193 |
|
---|
| 194 | LogManager::getSingleton().logMessage(
|
---|
| 195 | LML_NORMAL,
|
---|
| 196 | "GLXPBuffer::PBuffer created -- Real dimensions "+
|
---|
| 197 | StringConverter::toString(iWidth)+"x"+StringConverter::toString(iHeight)+
|
---|
| 198 | ", number of bits is "+
|
---|
| 199 | StringConverter::toString(bits)+
|
---|
| 200 | ", floating point is "+
|
---|
| 201 | StringConverter::toString(isFloat)
|
---|
| 202 | );
|
---|
| 203 | mWidth = iWidth;
|
---|
| 204 | mHeight = iHeight;
|
---|
| 205 | }
|
---|
| 206 |
|
---|
| 207 | GLXPBuffer::~GLXPBuffer()
|
---|
| 208 | {
|
---|
| 209 | // Destroy and unregister context
|
---|
| 210 | delete mContext;
|
---|
| 211 | // Destroy GL context
|
---|
| 212 | glXDestroyContext(_pDpy, _hGLContext);
|
---|
| 213 | _hGLContext = 0;
|
---|
| 214 | glXDestroyPbuffer(_pDpy, _hPBuffer);
|
---|
| 215 | _hPBuffer = 0;
|
---|
| 216 | LogManager::getSingleton().logMessage(
|
---|
| 217 | LML_NORMAL,
|
---|
| 218 | "GLXPBuffer::PBuffer destroyed");
|
---|
| 219 | }
|
---|
| 220 |
|
---|
| 221 | GLXPBuffer::RTFType GLXPBuffer::detectRTFType()
|
---|
| 222 | {
|
---|
| 223 | RTFType floatBuffer = RTF_NONE;
|
---|
| 224 | /// Query supported float buffer extensions
|
---|
| 225 | /// Choose the best one
|
---|
| 226 | std::stringstream ext;
|
---|
| 227 | std::string instr;
|
---|
| 228 | ext << glXQueryExtensionsString(_pDpy, DefaultScreen(_pDpy)) << " " << glXGetClientString(_pDpy, GLX_EXTENSIONS);
|
---|
| 229 | while(ext >> instr)
|
---|
| 230 | {
|
---|
| 231 | if(instr == "GLX_NV_float_buffer" && floatBuffer<RTF_NV)
|
---|
| 232 | floatBuffer = RTF_NV;
|
---|
| 233 | if(instr == "GLX_ATI_pixel_format_float" && floatBuffer<RTF_ATI)
|
---|
| 234 | floatBuffer = RTF_ATI;
|
---|
| 235 | if(instr == "GLX_ARB_fbconfig_float" && floatBuffer<RTF_ARB)
|
---|
| 236 | floatBuffer = RTF_ARB;
|
---|
| 237 | }
|
---|
| 238 | return floatBuffer;
|
---|
| 239 | }
|
---|
| 240 |
|
---|
| 241 | }
|
---|