src/gallium/state_trackers/wgl/stw_ext_pbuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <windows.h>
  29
  30 #define WGL_WGLEXT_PROTOTYPES
  31
  32 #include <GL/gl.h>
  33 #include <GL/wglext.h>
  34
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37
  38 #include "stw_device.h"
  39 #include "stw_pixelformat.h"
  40 #include "stw_framebuffer.h"
  41
  42
  43 #define LARGE_WINDOW_SIZE 60000
  44
  45
  46 static LRESULT CALLBACK
  47 WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
  48 {
  49     MINMAXINFO *pMMI;
  50     switch (uMsg) {
  51     case WM_GETMINMAXINFO:
  52         // Allow to create a window bigger than the desktop
  53         pMMI = (MINMAXINFO *)lParam;
  54         pMMI->ptMaxSize.x = LARGE_WINDOW_SIZE;
  55         pMMI->ptMaxSize.y = LARGE_WINDOW_SIZE;
  56         pMMI->ptMaxTrackSize.x = LARGE_WINDOW_SIZE;
  57         pMMI->ptMaxTrackSize.y = LARGE_WINDOW_SIZE;
  58         break;
  59     default:
  60         break;
  61     }
  62
  63     return DefWindowProc(hWnd, uMsg, wParam, lParam);
  64 }
  65
  66
  67 HPBUFFERARB WINAPI
  68 wglCreatePbufferARB(HDC hCurrentDC,
  69                     int iPixelFormat,
  70                     int iWidth,
  71                     int iHeight,
  72                     const int *piAttribList)
  73 {
  74    static boolean first = TRUE;
  75    const int *piAttrib;
  76    int useLargest = 0;
  77    const struct stw_pixelformat_info *info;
  78    struct stw_framebuffer *fb;
  79    DWORD dwExStyle;
  80    DWORD dwStyle;
  81    RECT rect;
  82    HWND hWnd;
  83    HDC hDC;
  84    int iDisplayablePixelFormat;
  85    PIXELFORMATDESCRIPTOR pfd;
  86    BOOL bRet;
  87
  88    info = stw_pixelformat_get_info(iPixelFormat);
  89    if (!info) {
  90       SetLastError(ERROR_INVALID_PIXEL_FORMAT);
  91       return 0;
  92    }
  93
  94    if (iWidth <= 0 || iHeight <= 0) {
  95       SetLastError(ERROR_INVALID_DATA);
  96       return 0;
  97    }
  98
  99    for (piAttrib = piAttribList; *piAttrib; piAttrib++) {
 100       switch (*piAttrib) {
 101       case WGL_PBUFFER_LARGEST_ARB:
 102          piAttrib++;
 103          useLargest = *piAttrib;
 104          break;
 105       default:
 106          SetLastError(ERROR_INVALID_DATA);
 107          return 0;
 108       }
 109    }
 110
 111    if (iWidth > stw_dev->max_2d_length) {
 112       if (useLargest) {
 113          iWidth = stw_dev->max_2d_length;
 114       } else {
 115          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 116          return 0;
 117       }
 118    }
 119
 120    if (iHeight > stw_dev->max_2d_length) {
 121       if (useLargest) {
 122          iHeight = stw_dev->max_2d_length;
 123       } else {
 124          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 125          return 0;
 126       }
 127    }
 128
 129    /*
 130     * Implement pbuffers through invisible windows
 131     */
 132
 133    if (first) {
 134       WNDCLASS wc;
 135       memset(&wc, 0, sizeof wc);
 136       wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
 137       wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 138       wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 139       wc.lpfnWndProc = WndProc;
 140       wc.lpszClassName = "wglpbuffer";
 141       wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
 142       RegisterClass(&wc);
 143       first = FALSE;
 144    }
 145
 146    dwExStyle = 0;
 147    dwStyle = WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
 148
 149    if (0) {
 150       /*
 151        * Don't hide the window -- useful for debugging what the application is
 152        * drawing
 153        */
 154
 155       dwStyle |= WS_VISIBLE | WS_OVERLAPPEDWINDOW;
 156    } else {
 157       dwStyle |= WS_POPUPWINDOW;
 158    }
 159
 160    rect.left = 0;
 161    rect.top = 0;
 162    rect.right = rect.left + iWidth;
 163    rect.bottom = rect.top + iHeight;
 164
 165    /*
 166     * The CreateWindowEx parameters are the total (outside) dimensions of the
 167     * window, which can vary with Windows version and user settings.  Use
 168     * AdjustWindowRect to get the required total area for the given client area.
 169     *
 170     * AdjustWindowRectEx does not accept WS_OVERLAPPED style (which is defined
 171     * as 0), which means we need to use some other style instead, e.g.,
 172     * WS_OVERLAPPEDWINDOW or WS_POPUPWINDOW as above.
 173     */
 174
 175    AdjustWindowRectEx(&rect, dwStyle, FALSE, dwExStyle);
 176
 177    hWnd = CreateWindowEx(dwExStyle,
 178                          "wglpbuffer", /* wc.lpszClassName */
 179                          NULL,
 180                          dwStyle,
 181                          CW_USEDEFAULT, /* x */
 182                          CW_USEDEFAULT, /* y */
 183                          rect.right - rect.left, /* width */
 184                          rect.bottom - rect.top, /* height */
 185                          NULL,
 186                          NULL,
 187                          NULL,
 188                          NULL);
 189    if (!hWnd) {
 190       return 0;
 191    }
 192
 193 #ifdef DEBUG
 194    /*
 195     * Verify the client area size matches the specified size.
 196     */
 197
 198    GetClientRect(hWnd, &rect);
 199    assert(rect.left == 0);
 200    assert(rect.top == 0);
 201    assert(rect.right - rect.left == iWidth);
 202    assert(rect.bottom - rect.top == iHeight);
 203 #endif
 204
 205    hDC = GetDC(hWnd);
 206    if (!hDC) {
 207       return 0;
 208    }
 209
 210    /*
 211     * We can't pass non-displayable pixel formats to GDI, which is why we
 212     * create the framebuffer object before calling SetPixelFormat().
 213     */
 214    fb = stw_framebuffer_create(hDC, iPixelFormat);
 215    if (!fb) {
 216       SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 217       return NULL;
 218    }
 219
 220    fb->bPbuffer = TRUE;
 221    iDisplayablePixelFormat = fb->iDisplayablePixelFormat;
 222
 223    stw_framebuffer_release(fb);
 224
 225    /*
 226     * We need to set a displayable pixel format on the hidden window DC
 227     * so that wglCreateContext and wglMakeCurrent are not overruled by GDI.
 228     */
 229    bRet = SetPixelFormat(hDC, iDisplayablePixelFormat, &pfd);
 230    assert(bRet);
 231
 232    return (HPBUFFERARB)fb;
 233 }
 234
 235
 236 HDC WINAPI
 237 wglGetPbufferDCARB(HPBUFFERARB hPbuffer)
 238 {
 239    struct stw_framebuffer *fb;
 240    HDC hDC;
 241
 242    fb = (struct stw_framebuffer *)hPbuffer;
 243
 244    hDC = GetDC(fb->hWnd);
 245
 246    assert(hDC == fb->hDC);
 247
 248    return hDC;
 249 }
 250
 251
 252 int WINAPI
 253 wglReleasePbufferDCARB(HPBUFFERARB hPbuffer,
 254                        HDC hDC)
 255 {
 256    struct stw_framebuffer *fb;
 257
 258    fb = (struct stw_framebuffer *)hPbuffer;
 259
 260    return ReleaseDC(fb->hWnd, hDC);
 261 }
 262
 263
 264 BOOL WINAPI
 265 wglDestroyPbufferARB(HPBUFFERARB hPbuffer)
 266 {
 267    struct stw_framebuffer *fb;
 268
 269    fb = (struct stw_framebuffer *)hPbuffer;
 270
 271    /* This will destroy all our data */
 272    return DestroyWindow(fb->hWnd);
 273 }
 274
 275
 276 BOOL WINAPI
 277 wglQueryPbufferARB(HPBUFFERARB hPbuffer,
 278                    int iAttribute,
 279                    int *piValue)
 280 {
 281    struct stw_framebuffer *fb;
 282
 283    fb = (struct stw_framebuffer *)hPbuffer;
 284
 285    switch (iAttribute) {
 286    case WGL_PBUFFER_WIDTH_ARB:
 287       *piValue = fb->width;
 288       return TRUE;
 289    case WGL_PBUFFER_HEIGHT_ARB:
 290       *piValue = fb->height;
 291       return TRUE;
 292    case WGL_PBUFFER_LOST_ARB:
 293       /* We assume that no content is ever lost due to display mode change */
 294       *piValue = FALSE;
 295       return TRUE;
 296    default:
 297       SetLastError(ERROR_INVALID_DATA);
 298       return FALSE;
 299    }
 300 }