diff options
Diffstat (limited to 'src/mesa/state_tracker/wgl/stw_wgl_pixelformat.c')
| -rw-r--r-- | src/mesa/state_tracker/wgl/stw_wgl_pixelformat.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/wgl/stw_wgl_pixelformat.c b/src/mesa/state_tracker/wgl/stw_wgl_pixelformat.c new file mode 100644 index 0000000000..7a8a2e22e4 --- /dev/null +++ b/src/mesa/state_tracker/wgl/stw_wgl_pixelformat.c @@ -0,0 +1,187 @@ +/************************************************************************** + * + * 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 <windows.h> + +#include "pipe/p_compiler.h" +#include "pipe/p_debug.h" +#include "stw_pixelformat.h" +#include "stw_wgl.h" + +static uint currentpixelformat = 0; + +WINGDIAPI int APIENTRY +wglChoosePixelFormat( + HDC hdc, + CONST PIXELFORMATDESCRIPTOR *ppfd ) +{ + uint count; + uint index; + uint bestindex; + uint bestdelta; + + (void) hdc; + + count = pixelformat_get_count(); + bestindex = count; + bestdelta = 0xffffffff; + + if (ppfd->nSize != sizeof( PIXELFORMATDESCRIPTOR ) || ppfd->nVersion != 1) + return 0; + if (ppfd->iPixelType != PFD_TYPE_RGBA) + return 0; + if (!(ppfd->dwFlags & PFD_DRAW_TO_WINDOW)) + return 0; + if (!(ppfd->dwFlags & PFD_SUPPORT_OPENGL)) + return 0; + if (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) + return 0; + if (ppfd->dwFlags & PFD_SUPPORT_GDI) + return 0; + if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE) && (ppfd->dwFlags & PFD_STEREO)) + return 0; + + for (index = 0; index < count; index++) { + uint delta = 0; + const struct pixelformat_info *pf = pixelformat_get_info( index ); + + if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE)) { + if ((ppfd->dwFlags & PFD_DOUBLEBUFFER) && !(pf->flags & PF_FLAG_DOUBLEBUFFER)) + continue; + if (!(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; +} + +WINGDIAPI int APIENTRY +wglDescribePixelFormat( + 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; +} + +WINGDIAPI int APIENTRY +wglGetPixelFormat( + HDC hdc ) +{ + (void) hdc; + + return currentpixelformat; +} + +WINGDIAPI BOOL APIENTRY +wglSetPixelFormat( + HDC hdc, + int iPixelFormat, + const PIXELFORMATDESCRIPTOR *ppfd ) +{ + uint count; + uint index; + + (void) hdc; + + count = pixelformat_get_extended_count(); + index = (uint) iPixelFormat - 1; + + if (index >= count || ppfd->nSize != sizeof( PIXELFORMATDESCRIPTOR )) + return FALSE; + + currentpixelformat = index + 1; + return TRUE; +} |