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This commit is contained in:
romkazvo
245
RenderDll/XRenderOGL/GLPBuffer.cpp
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245
RenderDll/XRenderOGL/GLPBuffer.cpp
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/*=============================================================================
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GLPBuffer.cpp : implementation of the NVidia Pixel Buffers.
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Copyright (c) 2001 Crytek Studios. All Rights Reserved.
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Revision history:
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* Created by Honich Andrey
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=============================================================================*/
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#include "RenderPCH.h"
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#include "GL_Renderer.h"
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#include "GLPBuffer.h"
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CPBuffer::CPBuffer( int w, int h, unsigned int mode ) : m_Width(w), m_Height(h), m_Mode(mode), m_MyDC(NULL), m_MyGLctx(NULL), m_Buffer(NULL)
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{
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}
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CPBuffer::~CPBuffer()
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{
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if (m_Buffer)
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{
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pwglDeleteContext(m_MyGLctx);
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wglReleasePbufferDCARB(m_Buffer, m_MyDC);
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wglDestroyPbufferARB(m_Buffer);
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}
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}
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// Check to see if the pbuffer was lost.
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// If it was lost, destroy it and then recreate it.
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void CPBuffer::mfHandleModeSwitch()
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{
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int lost = 0;
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wglQueryPbufferARB(m_Buffer, WGL_PBUFFER_LOST_ARB, &lost);
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if ( lost )
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{
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this->~CPBuffer();
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mfInitialize();
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}
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}
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// This function actually does the creation of the p-buffer.
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// It can only be called once a window has already been created.
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bool CPBuffer::mfInitialize(bool bShare)
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{
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HDC hdc = pwglGetCurrentDC();
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HGLRC hglrc = pwglGetCurrentContext();
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// Query for a suitable pixel format based on the specified mode.
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int iattributes[2*MAX_ATTRIBS];
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float fattributes[2*MAX_ATTRIBS];
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int nfattribs = 0;
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int niattribs = 0;
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// Attribute arrays must be "0" terminated - for simplicity, first
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// just zero-out the array entire, then fill from left to right.
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for ( int a = 0; a < 2*MAX_ATTRIBS; a++ )
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{
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iattributes[a] = 0;
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fattributes[a] = 0;
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}
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// Since we are trying to create a pbuffer, the pixel format we
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// request (and subsequently use) must be "p-buffer capable".
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iattributes[2*niattribs ] = WGL_DRAW_TO_PBUFFER_ARB;
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iattributes[2*niattribs+1] = true;
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niattribs++;
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if (m_Mode & FPB_DRAWTOTEXTURE)
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{
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iattributes[2*niattribs ] = WGL_BIND_TO_TEXTURE_RGB_ARB;
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iattributes[2*niattribs+1] = true;
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niattribs++;
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}
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else
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{
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if ( m_Mode & FPB_INDEX )
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{
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iattributes[2*niattribs ] = WGL_PIXEL_TYPE_ARB;
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iattributes[2*niattribs+1] = WGL_TYPE_COLORINDEX_ARB; // Yikes!
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niattribs++;
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}
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else
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{
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iattributes[2*niattribs ] = WGL_PIXEL_TYPE_ARB;
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iattributes[2*niattribs+1] = WGL_TYPE_RGBA_ARB;
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niattribs++;
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}
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if ( m_Mode & FPB_DOUBLE )
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{
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iattributes[2*niattribs ] = WGL_DOUBLE_BUFFER_ARB;
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iattributes[2*niattribs+1] = true;
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niattribs++;
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}
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if ( m_Mode & FPB_DEPTH )
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{
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iattributes[2*niattribs ] = WGL_DEPTH_BITS_ARB;
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iattributes[2*niattribs+1] = 1;
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niattribs++;
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}
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if ( m_Mode & FPB_STENCIL )
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{
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iattributes[2*niattribs ] = WGL_STENCIL_BITS_ARB;
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iattributes[2*niattribs+1] = 1;
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niattribs++;
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}
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if ( m_Mode & FPB_ACCUM )
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{
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iattributes[2*niattribs ] = WGL_ACCUM_BITS_ARB;
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iattributes[2*niattribs+1] = 1;
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niattribs++;
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}
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iattributes[2*niattribs ] = WGL_SUPPORT_OPENGL_ARB;
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iattributes[2*niattribs+1] = true;
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niattribs++;
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}
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int format;
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int pformat[MAX_PFORMATS];
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unsigned int nformats;
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if ( !wglChoosePixelFormatARB( hdc, iattributes, fattributes, MAX_PFORMATS, pformat, &nformats ) )
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{
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iLog->Log("Warning: PBuffer creation error: Couldn't find a suitable pixel format.\n" );
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return false;
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}
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format = pformat[0];
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// Create the p-buffer.
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iattributes[0] = 0;
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niattribs = 0;
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if (m_Mode & FPB_DRAWTOTEXTURE)
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{
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iattributes[2*niattribs ] = WGL_TEXTURE_FORMAT_ARB;
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iattributes[2*niattribs+1] = WGL_TEXTURE_RGBA_ARB;
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niattribs++;
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iattributes[2*niattribs ] = WGL_TEXTURE_TARGET_ARB;
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iattributes[2*niattribs+1] = WGL_TEXTURE_2D_ARB;
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niattribs++;
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iattributes[2*niattribs ] = WGL_MIPMAP_TEXTURE_ARB;
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iattributes[2*niattribs+1] = 0;
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niattribs++;
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iattributes[2*niattribs ] = WGL_PBUFFER_LARGEST_ARB;
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iattributes[2*niattribs+1] = 0;
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niattribs++;
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iattributes[2*niattribs ] = 0;
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}
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m_Buffer = wglCreatePbufferARB( hdc, format, m_Width, m_Height, iattributes );
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if ( !m_Buffer )
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{
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DWORD err = GetLastError();
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iLog->Log("Warning: PBuffer creation error: wglCreatePbufferARB() failed\n" );
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if ( err == ERROR_INVALID_PIXEL_FORMAT )
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{
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iLog->Log("Warning: ERROR_INVALID_PIXEL_FORMAT\n" );
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}
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else
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if ( err == ERROR_NO_SYSTEM_RESOURCES )
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{
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iLog->Log("Warning: ERROR_NO_SYSTEM_RESOURCES\n" );
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}
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else
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if ( err == ERROR_INVALID_DATA )
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{
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iLog->Log("Warning: ERROR_INVALID_DATA\n" );
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}
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return false;
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}
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// Get the device context.
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m_MyDC = wglGetPbufferDCARB( m_Buffer );
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if ( !m_MyDC )
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{
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iLog->Log("Warning: PBuffer creation error: wglGetPbufferDCARB() failed\n" );
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return false;
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}
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// Create a gl context for the p-buffer.
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m_MyGLctx = pwglCreateContext( m_MyDC );
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if ( !m_MyGLctx )
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{
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iLog->Log("Warning: PBuffer creation error: wglCreateContext() failed\n" );
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return false;
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}
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if( bShare )
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{
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if( !pwglShareLists(hglrc, m_MyGLctx) )
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{
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iLog->Log("Warning: PBuffer: wglShareLists() failed\n" );
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return false;
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}
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}
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// Determine the actual width and height we were able to create.
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wglQueryPbufferARB( m_Buffer, WGL_PBUFFER_WIDTH_ARB, &m_Width );
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wglQueryPbufferARB( m_Buffer, WGL_PBUFFER_HEIGHT_ARB, &m_Height );
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#ifdef _DEBUG
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iLog->Log("Created a %d x %d PBuffer\n", m_Width, m_Height );
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#endif
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return true;
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}
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bool CPBuffer::mfMakeCurrent()
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{
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if ( !pwglMakeCurrent( m_MyDC, m_MyGLctx ) )
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{
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iLog->Log("Warning: CPBuffer::mfMakeCurrent() failed.\n" );
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return false;
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}
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return true;
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}
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bool CPBuffer::mfMakeMainCurrent()
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{
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CGLRenderer *rd = gcpOGL;
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if ( !pwglMakeCurrent( rd->m_CurrContext->m_hDC, rd->m_CurrContext->m_hRC ) )
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{
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iLog->Log("Warning: CPBuffer::mfMakeMainCurrent() failed.\n" );
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return false;
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}
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return true;
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}
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BOOL CPBuffer::mfTextureBind()
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{
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return wglBindTexImageARB(m_Buffer, WGL_FRONT_LEFT_ARB);
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}
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BOOL CPBuffer::mfReleaseFromTexture()
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{
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return wglReleaseTexImageARB(m_Buffer, WGL_FRONT_LEFT_ARB);
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}
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