diff options
Diffstat (limited to 'src/mesa/state_tracker/wgl/stw_framebuffer.c')
| -rw-r--r-- | src/mesa/state_tracker/wgl/stw_framebuffer.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/wgl/stw_framebuffer.c b/src/mesa/state_tracker/wgl/stw_framebuffer.c new file mode 100644 index 0000000000..1ecafa451e --- /dev/null +++ b/src/mesa/state_tracker/wgl/stw_framebuffer.c @@ -0,0 +1,181 @@ +/************************************************************************** + * + * 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 "main/context.h" +#include "pipe/p_format.h" +#include "state_tracker/st_context.h" +#include "state_tracker/st_public.h" +#include "stw_framebuffer.h" + +void +framebuffer_resize( + struct stw_framebuffer *fb, + GLuint width, + GLuint height ) +{ + if (fb->hbmDIB == NULL || fb->stfb->Base.Width != width || fb->stfb->Base.Height != height) { + if (fb->hbmDIB) + DeleteObject( fb->hbmDIB ); + + fb->hbmDIB = CreateCompatibleBitmap( + fb->hDC, + width, + height ); + } + + st_resize_framebuffer( fb->stfb, width, height ); +} + +static struct stw_framebuffer *fb_head = NULL; + +static LRESULT CALLBACK +window_proc( + HWND hWnd, + UINT uMsg, + WPARAM wParam, + LPARAM lParam ) +{ + struct stw_framebuffer *fb; + + for (fb = fb_head; fb != NULL; fb = fb->next) + if (fb->hWnd == hWnd) + break; + assert( fb != NULL ); + + if (uMsg == WM_SIZE && wParam != SIZE_MINIMIZED) + framebuffer_resize( fb, LOWORD( lParam ), HIWORD( lParam ) ); + + return CallWindowProc( fb->WndProc, hWnd, uMsg, wParam, lParam ); +} + +/* Create a new framebuffer object which will correspond to the given HDC. + */ +struct stw_framebuffer * +framebuffer_create( + HDC hdc, + GLvisual *visual, + GLuint width, + GLuint height ) +{ + struct stw_framebuffer *fb; + enum pipe_format colorFormat, depthFormat, stencilFormat; + + fb = CALLOC_STRUCT( stw_framebuffer ); + if (fb == NULL) + return NULL; + + /* Determine PIPE_FORMATs for buffers. + */ + colorFormat = PIPE_FORMAT_A8R8G8B8_UNORM; + + if (visual->depthBits == 0) + depthFormat = PIPE_FORMAT_NONE; + else if (visual->depthBits <= 16) + depthFormat = PIPE_FORMAT_Z16_UNORM; + else if (visual->depthBits <= 24) + depthFormat = PIPE_FORMAT_S8Z24_UNORM; + else + depthFormat = PIPE_FORMAT_Z32_UNORM; + + if (visual->stencilBits == 8) { + if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) + stencilFormat = depthFormat; + else + stencilFormat = PIPE_FORMAT_S8_UNORM; + } + else { + stencilFormat = PIPE_FORMAT_NONE; + } + + fb->stfb = st_create_framebuffer( + visual, + colorFormat, + depthFormat, + stencilFormat, + width, + height, + (void *) fb ); + + fb->cColorBits = GetDeviceCaps( hdc, BITSPIXEL ); + fb->hDC = hdc; + + /* Subclass a window associated with the device context. + */ + fb->hWnd = WindowFromDC( hdc ); + if (fb->hWnd != NULL) { + fb->WndProc = (WNDPROC) SetWindowLong( + fb->hWnd, + GWL_WNDPROC, + (LONG) window_proc ); + } + + fb->next = fb_head; + fb_head = fb; + return fb; +} + +void +framebuffer_destroy( + struct stw_framebuffer *fb ) +{ + struct stw_framebuffer **link = &fb_head; + struct stw_framebuffer *pfb = fb_head; + + while (pfb != NULL) { + if (pfb == fb) { + if (fb->hWnd != NULL) { + SetWindowLong( + fb->hWnd, + GWL_WNDPROC, + (LONG) fb->WndProc ); + } + + *link = fb->next; + FREE( fb ); + return; + } + + link = &pfb->next; + pfb = pfb->next; + } +} + +/* Given an hdc, return the corresponding wgl_context. + */ +struct stw_framebuffer * +framebuffer_from_hdc( + HDC hdc ) +{ + struct stw_framebuffer *fb; + + for (fb = fb_head; fb != NULL; fb = fb->next) + if (fb->hDC == hdc) + return fb; + return NULL; +} |