src/gallium/frontends/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 "util/u_debug.h"
  39
  40 #include "stw_device.h"
  41 #include "stw_pixelformat.h"
  42 #include "stw_framebuffer.h"
  43
  44
  45 #define LARGE_WINDOW_SIZE 60000
  46
  47
  48 static LRESULT CALLBACK
  49 WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
  50 {
  51     MINMAXINFO *pMMI;
  52     switch (uMsg) {
  53     case WM_GETMINMAXINFO:
  54         // Allow to create a window bigger than the desktop
  55         pMMI = (MINMAXINFO *)lParam;
  56         pMMI->ptMaxSize.x = LARGE_WINDOW_SIZE;
  57         pMMI->ptMaxSize.y = LARGE_WINDOW_SIZE;
  58         pMMI->ptMaxTrackSize.x = LARGE_WINDOW_SIZE;
  59         pMMI->ptMaxTrackSize.y = LARGE_WINDOW_SIZE;
  60         break;
  61     default:
  62         break;
  63     }
  64
  65     return DefWindowProc(hWnd, uMsg, wParam, lParam);
  66 }
  67
  68
  69 HPBUFFERARB WINAPI
  70 wglCreatePbufferARB(HDC hCurrentDC,
  71                     int iPixelFormat,
  72                     int iWidth,
  73                     int iHeight,
  74                     const int *piAttribList)
  75 {
  76    static boolean first = TRUE;
  77    const int *piAttrib;
  78    int useLargest = 0;
  79    const struct stw_pixelformat_info *info;
  80    struct stw_framebuffer *fb;
  81    DWORD dwExStyle;
  82    DWORD dwStyle;
  83    RECT rect;
  84    HWND hWnd;
  85    HDC hDC;
  86    int iDisplayablePixelFormat;
  87    PIXELFORMATDESCRIPTOR pfd;
  88    BOOL bRet;
  89    int textureFormat = WGL_NO_TEXTURE_ARB;
  90    int textureTarget = WGL_NO_TEXTURE_ARB;
  91    BOOL textureMipmap = FALSE;
  92
  93    info = stw_pixelformat_get_info(iPixelFormat - 1);
  94    if (!info) {
  95       SetLastError(ERROR_INVALID_PIXEL_FORMAT);
  96       return 0;
  97    }
  98
  99    if (iWidth <= 0 || iHeight <= 0) {
 100       SetLastError(ERROR_INVALID_DATA);
 101       return 0;
 102    }
 103
 104    if (piAttribList) {
 105       for (piAttrib = piAttribList; *piAttrib; piAttrib++) {
 106          switch (*piAttrib) {
 107          case WGL_PBUFFER_LARGEST_ARB:
 108             piAttrib++;
 109             useLargest = *piAttrib;
 110             break;
 111           case WGL_TEXTURE_FORMAT_ARB:
 112              /* WGL_ARB_render_texture */
 113              piAttrib++;
 114              textureFormat = *piAttrib;
 115              if (textureFormat != WGL_TEXTURE_RGB_ARB &&
 116                 textureFormat != WGL_TEXTURE_RGBA_ARB &&
 117                 textureFormat != WGL_NO_TEXTURE_ARB) {
 118                 SetLastError(ERROR_INVALID_DATA);
 119                 return 0;
 120              }
 121              break;
 122           case WGL_TEXTURE_TARGET_ARB:
 123              /* WGL_ARB_render_texture */
 124              piAttrib++;
 125              textureTarget = *piAttrib;
 126              if (textureTarget != WGL_TEXTURE_CUBE_MAP_ARB &&
 127                  textureTarget != WGL_TEXTURE_1D_ARB &&
 128                  textureTarget != WGL_TEXTURE_2D_ARB &&
 129                  textureTarget != WGL_NO_TEXTURE_ARB) {
 130                 SetLastError(ERROR_INVALID_DATA);
 131                 return 0;
 132              }
 133              break;
 134          case WGL_MIPMAP_TEXTURE_ARB:
 135             /* WGL_ARB_render_texture */
 136             piAttrib++;
 137             textureMipmap = !!*piAttrib;
 138             break;
 139          default:
 140             SetLastError(ERROR_INVALID_DATA);
 141             debug_printf("wgl: Unsupported attribute 0x%x in %s\n",
 142                          *piAttrib, __func__);
 143             return 0;
 144          }
 145       }
 146    }
 147
 148    if (iWidth > stw_dev->max_2d_length) {
 149       if (useLargest) {
 150          iWidth = stw_dev->max_2d_length;
 151       } else {
 152          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 153          return 0;
 154       }
 155    }
 156
 157    if (iHeight > stw_dev->max_2d_length) {
 158       if (useLargest) {
 159          iHeight = stw_dev->max_2d_length;
 160       } else {
 161          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 162          return 0;
 163       }
 164    }
 165
 166    /*
 167     * Implement pbuffers through invisible windows
 168     */
 169
 170    if (first) {
 171       WNDCLASS wc;
 172       memset(&wc, 0, sizeof wc);
 173       wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
 174       wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 175       wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 176       wc.lpfnWndProc = WndProc;
 177       wc.lpszClassName = "wglpbuffer";
 178       wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
 179       RegisterClass(&wc);
 180       first = FALSE;
 181    }
 182
 183    dwExStyle = 0;
 184    dwStyle = WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
 185
 186    if (0) {
 187       /*
 188        * Don't hide the window -- useful for debugging what the application is
 189        * drawing
 190        */
 191
 192       dwStyle |= WS_VISIBLE | WS_OVERLAPPEDWINDOW;
 193    } else {
 194       dwStyle |= WS_POPUPWINDOW;
 195    }
 196
 197    rect.left = 0;
 198    rect.top = 0;
 199    rect.right = rect.left + iWidth;
 200    rect.bottom = rect.top + iHeight;
 201
 202    /*
 203     * The CreateWindowEx parameters are the total (outside) dimensions of the
 204     * window, which can vary with Windows version and user settings.  Use
 205     * AdjustWindowRect to get the required total area for the given client area.
 206     *
 207     * AdjustWindowRectEx does not accept WS_OVERLAPPED style (which is defined
 208     * as 0), which means we need to use some other style instead, e.g.,
 209     * WS_OVERLAPPEDWINDOW or WS_POPUPWINDOW as above.
 210     */
 211
 212    AdjustWindowRectEx(&rect, dwStyle, FALSE, dwExStyle);
 213
 214    hWnd = CreateWindowEx(dwExStyle,
 215                          "wglpbuffer", /* wc.lpszClassName */
 216                          NULL,
 217                          dwStyle,
 218                          CW_USEDEFAULT, /* x */
 219                          CW_USEDEFAULT, /* y */
 220                          rect.right - rect.left, /* width */
 221                          rect.bottom - rect.top, /* height */
 222                          NULL,
 223                          NULL,
 224                          NULL,
 225                          NULL);
 226    if (!hWnd) {
 227       return 0;
 228    }
 229
 230 #ifdef DEBUG
 231    /*
 232     * Verify the client area size matches the specified size.
 233     */
 234
 235    GetClientRect(hWnd, &rect);
 236    assert(rect.left == 0);
 237    assert(rect.top == 0);
 238    assert(rect.right - rect.left == iWidth);
 239    assert(rect.bottom - rect.top == iHeight);
 240 #endif
 241
 242    hDC = GetDC(hWnd);
 243    if (!hDC) {
 244       return 0;
 245    }
 246
 247    /*
 248     * We can't pass non-displayable pixel formats to GDI, which is why we
 249     * create the framebuffer object before calling SetPixelFormat().
 250     */
 251    fb = stw_framebuffer_create(hDC, iPixelFormat);
 252    if (!fb) {
 253       SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 254       return NULL;
 255    }
 256
 257    fb->bPbuffer = TRUE;
 258
 259    /* WGL_ARB_render_texture fields */
 260    fb->textureTarget = textureTarget;
 261    fb->textureFormat = textureFormat;
 262    fb->textureMipmap = textureMipmap;
 263
 264    iDisplayablePixelFormat = fb->iDisplayablePixelFormat;
 265
 266    stw_framebuffer_unlock(fb);
 267
 268    /*
 269     * We need to set a displayable pixel format on the hidden window DC
 270     * so that wglCreateContext and wglMakeCurrent are not overruled by GDI.
 271     */
 272    bRet = SetPixelFormat(hDC, iDisplayablePixelFormat, &pfd);
 273    assert(bRet);
 274
 275    return (HPBUFFERARB)fb;
 276 }
 277
 278
 279 HDC WINAPI
 280 wglGetPbufferDCARB(HPBUFFERARB hPbuffer)
 281 {
 282    struct stw_framebuffer *fb;
 283    HDC hDC;
 284
 285    if (!hPbuffer) {
 286       SetLastError(ERROR_INVALID_HANDLE);
 287       return NULL;
 288    }
 289
 290    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
 291
 292    hDC = GetDC(fb->hWnd);
 293
 294    return hDC;
 295 }
 296
 297
 298 int WINAPI
 299 wglReleasePbufferDCARB(HPBUFFERARB hPbuffer,
 300                        HDC hDC)
 301 {
 302    struct stw_framebuffer *fb;
 303
 304    if (!hPbuffer) {
 305       SetLastError(ERROR_INVALID_HANDLE);
 306       return 0;
 307    }
 308
 309    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
 310
 311    return ReleaseDC(fb->hWnd, hDC);
 312 }
 313
 314
 315 BOOL WINAPI
 316 wglDestroyPbufferARB(HPBUFFERARB hPbuffer)
 317 {
 318    struct stw_framebuffer *fb;
 319
 320    if (!hPbuffer) {
 321       SetLastError(ERROR_INVALID_HANDLE);
 322       return FALSE;
 323    }
 324
 325    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
 326
 327    /* This will destroy all our data */
 328    return DestroyWindow(fb->hWnd);
 329 }
 330
 331
 332 BOOL WINAPI
 333 wglQueryPbufferARB(HPBUFFERARB hPbuffer,
 334                    int iAttribute,
 335                    int *piValue)
 336 {
 337    struct stw_framebuffer *fb;
 338
 339    if (!hPbuffer) {
 340       SetLastError(ERROR_INVALID_HANDLE);
 341       return FALSE;
 342    }
 343
 344    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
 345
 346    switch (iAttribute) {
 347    case WGL_PBUFFER_WIDTH_ARB:
 348       *piValue = fb->width;
 349       return TRUE;
 350    case WGL_PBUFFER_HEIGHT_ARB:
 351       *piValue = fb->height;
 352       return TRUE;
 353    case WGL_PBUFFER_LOST_ARB:
 354       /* We assume that no content is ever lost due to display mode change */
 355       *piValue = FALSE;
 356       return TRUE;
 357    /* WGL_ARB_render_texture */
 358    case WGL_TEXTURE_TARGET_ARB:
 359       *piValue = fb->textureTarget;
 360       return TRUE;
 361    case WGL_TEXTURE_FORMAT_ARB:
 362       *piValue = fb->textureFormat;
 363       return TRUE;
 364    case WGL_MIPMAP_TEXTURE_ARB:
 365       *piValue = fb->textureMipmap;
 366       return TRUE;
 367    case WGL_MIPMAP_LEVEL_ARB:
 368       *piValue = fb->textureLevel;
 369       return TRUE;
 370    case WGL_CUBE_MAP_FACE_ARB:
 371       *piValue = fb->textureFace + WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB;
 372       return TRUE;
 373    default:
 374       SetLastError(ERROR_INVALID_DATA);
 375       return FALSE;
 376    }
 377 }