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 HPBUFFERARB WINAPI
  44 wglCreatePbufferARB(HDC _hDC,
  45                     int iPixelFormat,
  46                     int iWidth,
  47                     int iHeight,
  48                     const int *piAttribList)
  49 {
  50    static boolean first = TRUE;
  51    const int *piAttrib;
  52    int useLargest = 0;
  53    const struct stw_pixelformat_info *info;
  54    struct stw_framebuffer *fb;
  55    HWND hWnd;
  56    HDC hDC;
  57
  58    info = stw_pixelformat_get_info(iPixelFormat);
  59    if (!info) {
  60       SetLastError(ERROR_INVALID_PIXEL_FORMAT);
  61       return 0;
  62    }
  63
  64    if (iWidth <= 0 || iHeight <= 0) {
  65       SetLastError(ERROR_INVALID_DATA);
  66       return 0;
  67    }
  68
  69    for (piAttrib = piAttribList; *piAttrib; piAttrib++) {
  70       switch (*piAttrib) {
  71       case WGL_PBUFFER_LARGEST_ARB:
  72          piAttrib++;
  73          useLargest = *piAttrib;
  74          break;
  75       default:
  76          SetLastError(ERROR_INVALID_DATA);
  77          return 0;
  78       }
  79    }
  80
  81    if (iWidth > stw_dev->max_2d_length) {
  82       if (useLargest) {
  83          iWidth = stw_dev->max_2d_length;
  84       } else {
  85          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
  86          return 0;
  87       }
  88    }
  89
  90    if (iHeight > stw_dev->max_2d_length) {
  91       if (useLargest) {
  92          iHeight = stw_dev->max_2d_length;
  93       } else {
  94          SetLastError(ERROR_NO_SYSTEM_RESOURCES);
  95          return 0;
  96       }
  97    }
  98
  99    /*
 100     * Implement pbuffers through invisible windows
 101     */
 102
 103    if (first) {
 104       WNDCLASS wc;
 105       memset(&wc, 0, sizeof wc);
 106       wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
 107       wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 108       wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 109       wc.lpfnWndProc = DefWindowProc;
 110       wc.lpszClassName = "wglpbuffer";
 111       wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
 112       RegisterClass(&wc);
 113       first = FALSE;
 114    }
 115
 116    hWnd = CreateWindowEx(0,
 117                          "wglpbuffer", /* wc.lpszClassName */
 118                          "wglpbuffer",
 119 #if 0 /* Useful for debugging what the application is drawing */
 120                          WS_VISIBLE |
 121 #endif
 122                          WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 123                          CW_USEDEFAULT, CW_USEDEFAULT, /* x, y */
 124                          iWidth, iHeight,
 125                          NULL,
 126                          NULL,
 127                          NULL,
 128                          NULL);
 129    if (!hWnd) {
 130       return 0;
 131    }
 132
 133    hDC = GetDC(hWnd);
 134    if (!hDC) {
 135       return 0;
 136    }
 137
 138    SetPixelFormat(hDC, iPixelFormat, &info->pfd);
 139
 140    fb = stw_framebuffer_create(hDC, iPixelFormat);
 141    if (!fb) {
 142       SetLastError(ERROR_NO_SYSTEM_RESOURCES);
 143    }
 144
 145    return (HPBUFFERARB)fb;
 146 }
 147
 148
 149 HDC WINAPI
 150 wglGetPbufferDCARB(HPBUFFERARB hPbuffer)
 151 {
 152    struct stw_framebuffer *fb;
 153    HDC hDC;
 154
 155    fb = (struct stw_framebuffer *)hPbuffer;
 156
 157    hDC = GetDC(fb->hWnd);
 158    SetPixelFormat(hDC, fb->iPixelFormat, &fb->pfi->pfd);
 159
 160    return hDC;
 161 }
 162
 163
 164 int WINAPI
 165 wglReleasePbufferDCARB(HPBUFFERARB hPbuffer,
 166                        HDC hDC)
 167 {
 168    struct stw_framebuffer *fb;
 169
 170    fb = (struct stw_framebuffer *)hPbuffer;
 171
 172    return ReleaseDC(fb->hWnd, hDC);
 173 }
 174
 175
 176 BOOL WINAPI
 177 wglDestroyPbufferARB(HPBUFFERARB hPbuffer)
 178 {
 179    struct stw_framebuffer *fb;
 180
 181    fb = (struct stw_framebuffer *)hPbuffer;
 182
 183    /* This will destroy all our data */
 184    return DestroyWindow(fb->hWnd);
 185 }
 186
 187
 188 BOOL WINAPI
 189 wglQueryPbufferARB(HPBUFFERARB hPbuffer,
 190                    int iAttribute,
 191                    int *piValue)
 192 {
 193    struct stw_framebuffer *fb;
 194
 195    fb = (struct stw_framebuffer *)hPbuffer;
 196
 197    switch (iAttribute) {
 198    case WGL_PBUFFER_WIDTH_ARB:
 199       *piValue = fb->width;
 200       return TRUE;
 201    case WGL_PBUFFER_HEIGHT_ARB:
 202       *piValue = fb->width;
 203       return TRUE;
 204    case WGL_PBUFFER_LOST_ARB:
 205       /* We assume that no content is ever lost due to display mode change */
 206       *piValue = FALSE;
 207       return TRUE;
 208    default:
 209       SetLastError(ERROR_INVALID_DATA);
 210       return FALSE;
 211    }
 212 }