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 "state_tracker/graw.h"
  32 #include "target-helpers/inline_debug_helper.h"
  33 #include "target-helpers/inline_sw_helper.h"
  34 #include <windows.h>
  35
  36
  37 static LRESULT CALLBACK
  38 window_proc(HWND hWnd,
  39             UINT uMsg,
  40             WPARAM wParam,
  41             LPARAM lParam)
  42 {
  43    switch (uMsg) {
  44    case WM_DESTROY:
  45       PostQuitMessage(0);
  46       break;
  47
  48    default:
  49       return DefWindowProc(hWnd, uMsg, wParam, lParam);
  50    }
  51
  52    return 0;
  53 }
  54
  55 static struct {
  56    void (* draw)(void);
  57 } graw;
  58
  59 struct pipe_screen *
  60 graw_create_window_and_screen(int x,
  61                               int y,
  62                               unsigned width,
  63                               unsigned height,
  64                               enum pipe_format format,
  65                               void **handle)
  66 {
  67    struct sw_winsys *winsys = NULL;
  68    struct pipe_screen *screen = NULL;
  69    WNDCLASSEX wc;
  70    UINT style = WS_VISIBLE | WS_TILEDWINDOW;
  71    RECT rect;
  72    HWND hWnd = NULL;
  73    HDC hDC = NULL;
  74
  75    if (format != PIPE_FORMAT_R8G8B8A8_UNORM)
  76       goto fail;
  77
  78    winsys = gdi_create_sw_winsys();
  79    if (winsys == NULL)
  80       goto fail;
  81
  82    screen = sw_screen_create(winsys);
  83    if (screen == NULL)
  84       goto fail;
  85
  86    memset(&wc, 0, sizeof wc);
  87    wc.cbSize = sizeof wc;
  88    wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
  89    wc.lpfnWndProc = window_proc;
  90    wc.lpszClassName = "graw-gdi";
  91    wc.hInstance = GetModuleHandle(NULL);
  92    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
  93    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
  94    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
  95    RegisterClassEx(&wc);
  96
  97    SetRect(&rect, 0, 0, width, height);
  98    AdjustWindowRectEx(&rect, style, FALSE, 0);
  99
 100    hWnd = CreateWindowEx(0,
 101                          wc.lpszClassName,
 102                          wc.lpszClassName,
 103                          style,
 104                          x,
 105                          y,
 106                          rect.right - rect.left,
 107                          rect.bottom - rect.top,
 108                          NULL,
 109                          NULL,
 110                          wc.hInstance,
 111                          0);
 112    if (hWnd == NULL)
 113       goto fail;
 114
 115    hDC = GetDC(hWnd);
 116    if (hDC == NULL)
 117       goto fail;
 118
 119    *handle = (void *)hDC;
 120
 121    return debug_screen_wrap(screen);
 122
 123 fail:
 124    if (hWnd)
 125       DestroyWindow(hWnd);
 126
 127    if (screen)
 128       screen->destroy(screen);
 129
 130    return NULL;
 131 }
 132
 133 void
 134 graw_set_display_func(void (* draw)(void))
 135 {
 136    graw.draw = draw;
 137 }
 138
 139 void
 140 graw_main_loop(void)
 141 {
 142    for (;;) {
 143       MSG msg;
 144
 145       while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 146          if (msg.message == WM_QUIT) {
 147             return;
 148          }
 149          TranslateMessage(&msg);
 150          DispatchMessage(&msg);
 151       }
 152
 153       if (graw.draw) {
 154          graw.draw();
 155       }
 156
 157       Sleep(0);
 158    }
 159 }