/************************************************************************** * * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ #include "util/u_debug.h" #include "stw_pixelformat.h" #include "stw_public.h" #define MAX_PIXELFORMATS 16 static struct pixelformat_info pixelformats[MAX_PIXELFORMATS]; static uint pixelformat_count = 0; static uint pixelformat_extended_count = 0; static uint currentpixelformat = 0; static void add_standard_pixelformats( struct pixelformat_info **ppf, uint flags ) { struct pixelformat_info *pf = *ppf; struct pixelformat_color_info color24 = { 8, 0, 8, 8, 8, 16 }; struct pixelformat_alpha_info alpha8 = { 8, 24 }; struct pixelformat_alpha_info noalpha = { 0, 0 }; struct pixelformat_depth_info depth24s8 = { 24, 8 }; struct pixelformat_depth_info depth16 = { 16, 0 }; pf->flags = PF_FLAG_DOUBLEBUFFER | flags; pf->color = color24; pf->alpha = alpha8; pf->depth = depth16; pf++; pf->flags = PF_FLAG_DOUBLEBUFFER | flags; pf->color = color24; pf->alpha = alpha8; pf->depth = depth24s8; pf++; pf->flags = PF_FLAG_DOUBLEBUFFER | flags; pf->color = color24; pf->alpha = noalpha; pf->depth = depth16; pf++; pf->flags = PF_FLAG_DOUBLEBUFFER | flags; pf->color = color24; pf->alpha = noalpha; pf->depth = depth24s8; pf++; pf->flags = flags; pf->color = color24; pf->alpha = alpha8; pf->depth = depth16; pf++; pf->flags = flags; pf->color = color24; pf->alpha = alpha8; pf->depth = depth24s8; pf++; pf->flags = flags; pf->color = color24; pf->alpha = noalpha; pf->depth = depth16; pf++; pf->flags = flags; pf->color = color24; pf->alpha = noalpha; pf->depth = depth24s8; pf++; *ppf = pf; } void pixelformat_init( void ) { struct pixelformat_info *pf = pixelformats; add_standard_pixelformats( &pf, 0 ); pixelformat_count = pf - pixelformats; add_standard_pixelformats( &pf, PF_FLAG_MULTISAMPLED ); pixelformat_extended_count = pf - pixelformats; assert( pixelformat_extended_count <= MAX_PIXELFORMATS ); } uint pixelformat_get_count( void ) { return pixelformat_count; } uint pixelformat_get_extended_count( void ) { return pixelformat_extended_count; } const struct pixelformat_info * pixelformat_get_info( uint index ) { assert( index < pixelformat_extended_count ); return &pixelformats[index]; } int stw_pixelformat_describe( HDC hdc, int iPixelFormat, UINT nBytes, LPPIXELFORMATDESCRIPTOR ppfd ) { uint count; uint index; const struct pixelformat_info *pf; (void) hdc; count = pixelformat_get_extended_count(); index = (uint) iPixelFormat - 1; if (ppfd == NULL) return count; if (index >= count || nBytes != sizeof( PIXELFORMATDESCRIPTOR )) return 0; pf = pixelformat_get_info( index ); ppfd->nSize = sizeof( PIXELFORMATDESCRIPTOR ); ppfd->nVersion = 1; ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL; if (pf->flags & PF_FLAG_DOUBLEBUFFER) ppfd->dwFlags |= PFD_DOUBLEBUFFER | PFD_SWAP_COPY; ppfd->iPixelType = PFD_TYPE_RGBA; ppfd->cColorBits = pf->color.redbits + pf->color.greenbits + pf->color.bluebits; ppfd->cRedBits = pf->color.redbits; ppfd->cRedShift = pf->color.redshift; ppfd->cGreenBits = pf->color.greenbits; ppfd->cGreenShift = pf->color.greenshift; ppfd->cBlueBits = pf->color.bluebits; ppfd->cBlueShift = pf->color.blueshift; ppfd->cAlphaBits = pf->alpha.alphabits; ppfd->cAlphaShift = pf->alpha.alphashift; ppfd->cAccumBits = 0; ppfd->cAccumRedBits = 0; ppfd->cAccumGreenBits = 0; ppfd->cAccumBlueBits = 0; ppfd->cAccumAlphaBits = 0; ppfd->cDepthBits = pf->depth.depthbits; ppfd->cStencilBits = pf->depth.stencilbits; ppfd->cAuxBuffers = 0; ppfd->iLayerType = 0; ppfd->bReserved = 0; ppfd->dwLayerMask = 0; ppfd->dwVisibleMask = 0; ppfd->dwDamageMask = 0; return count; } /* Only used by the wgl code, but have it here to avoid exporting the * pixelformat.h functionality. */ int stw_pixelformat_choose( HDC hdc, CONST PIXELFORMATDESCRIPTOR *ppfd ) { uint count; uint index; uint bestindex; uint bestdelta; (void) hdc; count = pixelformat_get_count(); bestindex = count; bestdelta = 0xffffffff; for (index = 0; index < count; index++) { uint delta = 0; const struct pixelformat_info *pf = pixelformat_get_info( index ); if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE) && !!(ppfd->dwFlags & PFD_DOUBLEBUFFER) != !!(pf->flags & PF_FLAG_DOUBLEBUFFER)) continue; if (ppfd->cColorBits != pf->color.redbits + pf->color.greenbits + pf->color.bluebits) delta += 8; if (ppfd->cDepthBits != pf->depth.depthbits) delta += 4; if (ppfd->cStencilBits != pf->depth.stencilbits) delta += 2; if (ppfd->cAlphaBits != pf->alpha.alphabits) delta++; if (delta < bestdelta) { bestindex = index; bestdelta = delta; if (bestdelta == 0) break; } } if (bestindex == count) return 0; return bestindex + 1; } int stw_pixelformat_get( HDC hdc ) { return currentpixelformat; } BOOL stw_pixelformat_set( HDC hdc, int iPixelFormat ) { uint count; uint index; (void) hdc; index = (uint) iPixelFormat - 1; count = pixelformat_get_extended_count(); if (index >= count) return FALSE; currentpixelformat = iPixelFormat; /* Some applications mistakenly use the undocumented wglSetPixelFormat * function instead of SetPixelFormat, so we call SetPixelFormat here to * avoid opengl32.dll's wglCreateContext to fail */ if (GetPixelFormat(hdc) == 0) { SetPixelFormat(hdc, iPixelFormat, NULL); } return TRUE; } /* XXX: this needs to be turned into queries on pipe_screen or * stw_winsys. */ int stw_query_sample_buffers( void ) { return 1; } int stw_query_samples( void ) { return 4; }