src/gallium/targets/graw-gdi/graw_gdi.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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 #include "gdi/gdi_sw_winsys.h"
  30 #include "pipe/p_screen.h"
  31 #include "softpipe/sp_public.h"
  32 #include "state_tracker/graw.h"
  33 #include "sw/sw_public.h"
  34 #include "target-helpers/wrap_screen.h"
  35 #include <windows.h>
  36
  37
  38 static LRESULT CALLBACK
  39 window_proc(HWND hWnd,
  40             UINT uMsg,
  41             WPARAM wParam,
  42             LPARAM lParam)
  43 {
  44    switch (uMsg) {
  45    case WM_DESTROY:
  46       PostQuitMessage(0);
  47       break;
  48
  49    default:
  50       return DefWindowProc(hWnd, uMsg, wParam, lParam);
  51    }
  52
  53    return 0;
  54 }
  55
  56 static struct {
  57    void (* draw)(void);
  58 } graw;
  59
  60 struct pipe_screen *
  61 graw_create_window_and_screen(int x,
  62                               int y,
  63                               unsigned width,
  64                               unsigned height,
  65                               enum pipe_format format,
  66                               void **handle)
  67 {
  68    struct sw_winsys *winsys = NULL;
  69    struct pipe_screen *screen = NULL;
  70    WNDCLASSEX wc = {sizeof(wc)};
  71    UINT style = WS_VISIBLE | WS_TILEDWINDOW;
  72    RECT rect;
  73    HWND hWnd = NULL;
  74    HDC hDC = NULL;
  75
  76    if (format != PIPE_FORMAT_R8G8B8A8_UNORM)
  77       goto fail;
  78
  79    winsys = gdi_create_sw_winsys();
  80    if (winsys == NULL)
  81       goto fail;
  82
  83    screen = softpipe_create_screen(winsys);
  84    if (screen == NULL)
  85       goto fail;
  86
  87    wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
  88    wc.lpfnWndProc = window_proc;
  89    wc.lpszClassName = "graw-gdi";
  90    wc.hInstance = GetModuleHandle(NULL);
  91    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
  92    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
  93    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
  94    RegisterClassEx(&wc);
  95
  96    SetRect(&rect, 0, 0, width, height);
  97    AdjustWindowRectEx(&rect, style, FALSE, 0);
  98
  99    hWnd = CreateWindowEx(0,
 100                          wc.lpszClassName,
 101                          wc.lpszClassName,
 102                          style,
 103                          x,
 104                          y,
 105                          rect.right - rect.left,
 106                          rect.bottom - rect.top,
 107                          NULL,
 108                          NULL,
 109                          wc.hInstance,
 110                          0);
 111    if (hWnd == NULL)
 112       goto fail;
 113
 114    hDC = GetDC(hWnd);
 115    if (hDC == NULL)
 116       goto fail;
 117
 118    *handle = (void *)hDC;
 119
 120    return gallium_wrap_screen(screen);
 121
 122 fail:
 123    if (hWnd)
 124       DestroyWindow(hWnd);
 125
 126    if (screen)
 127       screen->destroy(screen);
 128
 129    return NULL;
 130 }
 131
 132 void
 133 graw_set_display_func(void (* draw)(void))
 134 {
 135    graw.draw = draw;
 136 }
 137
 138 void
 139 graw_main_loop(void)
 140 {
 141    for (;;) {
 142       MSG msg;
 143
 144       while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 145          if (msg.message == WM_QUIT) {
 146             return;
 147          }
 148          TranslateMessage(&msg);
 149          DispatchMessage(&msg);
 150       }
 151
 152       if (graw.draw) {
 153          graw.draw();
 154       }
 155
 156       Sleep(0);
 157    }
 158 }