You can now create multiple windows on Win32 SDL-1.3
authorSam Lantinga <slouken@libsdl.org>
Wed, 28 Jun 2006 08:12:07 +0000
branchSDL-1.3
changeset 1719 5b9f50c957ed
parent 1718 ed4d4f1ea201
child 1720 a1ebb17f9c52
You can now create multiple windows on Win32
include/SDL_video.h
src/video/SDL_video.c
src/video/win32/SDL_win32events.c
src/video/win32/SDL_win32events.h
src/video/win32/SDL_win32video.h
src/video/win32/SDL_win32window.c
src/video/win32/SDL_win32window.h
test/testwm2.c
--- a/include/SDL_video.h	Tue Jun 27 07:46:36 2006 +0000
+++ b/include/SDL_video.h	Wed Jun 28 08:12:07 2006 +0000
@@ -116,18 +116,29 @@
 typedef enum
 {
     SDL_WINDOW_FULLSCREEN = 0x00000001,         /**< fullscreen window, implies borderless */
-    SDL_WINDOW_BORDERLESS = 0x00000002,         /**< no window decoration */
+    SDL_WINDOW_OPENGL = 0x00000002,             /**< window usable with OpenGL context */
     SDL_WINDOW_SHOWN = 0x00000004,              /**< window is visible */
-    SDL_WINDOW_OPENGL = 0x00000008,             /**< window usable with OpenGL context */
+    SDL_WINDOW_BORDERLESS = 0x00000008,         /**< no window decoration */
     SDL_WINDOW_RESIZABLE = 0x00000010,          /**< window can be resized */
     SDL_WINDOW_MAXIMIZED = 0x00000020,          /**< maximized */
     SDL_WINDOW_MINIMIZED = 0x00000040,          /**< minimized */
-    SDL_WINDOW_INPUT_GRABBED = 0x00000080,      /**< window has grabbed input focus */
-    SDL_WINDOW_KEYBOARD_FOCUS = 0x00000100,     /**< window has keyboard focus */
-    SDL_WINDOW_MOUSE_FOCUS = 0x00000200,        /**< window has mouse focus */
+    SDL_WINDOW_INPUT_GRABBED = 0x00000100,      /**< window has grabbed input focus */
+    SDL_WINDOW_KEYBOARD_FOCUS = 0x00000200,     /**< window has keyboard focus */
+    SDL_WINDOW_MOUSE_FOCUS = 0x00000400,        /**< window has mouse focus */
 } SDL_WindowFlags;
 
 /**
+ * \def SDL_WINDOWPOS_UNDEFINED
+ * \brief Used to indicate that you don't care what the window position is.
+ */
+#define SDL_WINDOWPOS_UNDEFINED 0x7FFFFFF
+/**
+ * \def SDL_WINDOWPOS_CENTERED
+ * \brief Used to indicate that the window position should be centered.
+ */
+#define SDL_WINDOWPOS_CENTERED  0x7FFFFFE
+
+/**
  * \enum SDL_WindowEventID
  *
  * \brief Event subtype for window events
@@ -584,6 +595,12 @@
  *
  * \brief Set the position of the window.
  *
+ * \param windowID The window to reposition
+ * \param x The x coordinate of the window, SDL_WINDOWPOS_CENTERED, or SDL_WINDOWPOS_UNDEFINED
+ * \param y The y coordinate of the window, SDL_WINDOWPOS_CENTERED, or SDL_WINDOWPOS_UNDEFINED
+ *
+ * \note The window coordinate origin is the upper left of the display.
+ *
  * \sa SDL_GetWindowPosition()
  */
 extern DECLSPEC void SDLCALL SDL_SetWindowPosition(SDL_WindowID windowID,
@@ -737,7 +754,7 @@
  *
  * \brief Create and make active a 2D rendering context for a window.
  *
- * \param windowID The window used for rendering.
+ * \param windowID The window used for rendering
  * \param index The index of the render manager to initialize, or -1 to initialize the first one supporting the requested flags.
  * \param flags SDL_RendererFlags
  *
--- a/src/video/SDL_video.c	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/SDL_video.c	Wed Jun 28 08:12:07 2006 +0000
@@ -647,9 +647,9 @@
 SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
 {
     const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
-                                  SDL_WINDOW_BORDERLESS |
+                                  SDL_WINDOW_OPENGL |
                                   SDL_WINDOW_SHOWN |
-                                  SDL_WINDOW_OPENGL |
+                                  SDL_WINDOW_BORDERLESS |
                                   SDL_WINDOW_RESIZABLE |
                                   SDL_WINDOW_MAXIMIZED |
                                   SDL_WINDOW_MINIMIZED |
@@ -842,8 +842,12 @@
         return;
     }
 
-    window->x = x;
-    window->y = y;
+    if (x != SDL_WINDOWPOS_UNDEFINED) {
+        window->x = x;
+    }
+    if (y != SDL_WINDOWPOS_UNDEFINED) {
+        window->y = y;
+    }
 
     if (_this->SetWindowPosition) {
         _this->SetWindowPosition(_this, window);
--- a/src/video/win32/SDL_win32events.c	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/win32/SDL_win32events.c	Wed Jun 28 08:12:07 2006 +0000
@@ -24,10 +24,20 @@
 #include "SDL_win32video.h"
 
 
-static LRESULT CALLBACK
-WinMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
+LRESULT CALLBACK
+WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
-    return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
+    SDL_WindowData *data;
+    SDL_Window *window;
+
+    /* Get the window data for the window */
+    data = (SDL_WindowData *) GetProp(hwnd, TEXT("SDL_WindowData"));
+    if (!data) {
+        return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
+    }
+    window = data->window;
+
+    return CallWindowProc(data->wndproc, hwnd, msg, wParam, lParam);
 }
 
 void
@@ -63,7 +73,7 @@
     }
 
     if (name) {
-        SDL_Appname = SDL_iconv_utf8_ucs2(name);
+        SDL_Appname = WIN_UTF8ToString(name);
         SDL_Appstyle = style;
         SDL_Instance = hInst ? hInst : GetModuleHandle(NULL);
     }
@@ -77,7 +87,7 @@
     class.hbrBackground = NULL;
     class.hInstance = SDL_Instance;
     class.style = SDL_Appstyle;
-    class.lpfnWndProc = WinMessage;
+    class.lpfnWndProc = DefWindowProc;
     class.cbWndExtra = 0;
     class.cbClsExtra = 0;
     if (!RegisterClass(&class)) {
@@ -110,4 +120,20 @@
     }
 }
 
+/* Sets an error message based on GetLastError() */
+void
+WIN_SetError(const char *prefix)
+{
+    TCHAR buffer[1024];
+    char *message;
+
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
+                  NULL,
+                  GetLastError(), 0, buffer, SDL_arraysize(buffer), NULL);
+
+    message = WIN_StringToUTF8(buffer);
+    SDL_SetError("%s%s%s", prefix ? prefix : "", prefix ? ":" : "", message);
+    SDL_free(message);
+}
+
 /* vi: set ts=4 sw=4 expandtab: */
--- a/src/video/win32/SDL_win32events.h	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/win32/SDL_win32events.h	Wed Jun 28 08:12:07 2006 +0000
@@ -24,13 +24,14 @@
 #ifndef _SDL_win32events_h
 #define _SDL_win32events_h
 
-#include "../SDL_sysvideo.h"
-
 extern LPTSTR SDL_Appname;
 extern Uint32 SDL_Appstyle;
 extern HINSTANCE SDL_Instance;
 
+extern LRESULT CALLBACK WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam,
+                                       LPARAM lParam);
 extern void WIN_PumpEvents(_THIS);
+extern void WIN_SetError(const char *prefix);
 
 #endif /* _SDL_win32events_h */
 
--- a/src/video/win32/SDL_win32video.h	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/win32/SDL_win32video.h	Wed Jun 28 08:12:07 2006 +0000
@@ -33,6 +33,14 @@
 #include "SDL_win32events.h"
 #include "SDL_win32window.h"
 
+#ifdef UNICODE
+#define WIN_StringToUTF8(S) SDL_iconv_string("UTF-8", "UCS-2", (char *)S, (wcslen(S)+1)*sizeof(WCHAR))
+#define WIN_UTF8ToString(S) (WCHAR *)SDL_iconv_string("UCS-2", "UTF-8", (char *)S, SDL_strlen(S)+1)
+#else
+#define WIN_StringToUTF8(S) SDL_iconv_string("UTF-8", "ASCII", (char *)S, (strlen(S)+1))
+#define WIN_UTF8ToString(S) SDL_iconv_string("ASCII", "UTF-8", (char *)S, SDL_strlen(S)+1)
+#endif
+
 /* Private display data */
 
 struct SDL_PrivateVideoData
--- a/src/video/win32/SDL_win32window.c	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/win32/SDL_win32window.c	Wed Jun 28 08:12:07 2006 +0000
@@ -26,74 +26,378 @@
 #include "SDL_win32video.h"
 
 
+static int
+SetupWindowData(SDL_Window * window, HWND hwnd, BOOL created)
+{
+    SDL_WindowData *data;
+
+    /* Allocate the window data */
+    data = (SDL_WindowData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_OutOfMemory();
+        return -1;
+    }
+    data->window = window;
+    data->hwnd = hwnd;
+    data->created = created;
+
+    /* Associate the data with the window */
+    if (!SetProp(hwnd, TEXT("SDL_WindowData"), data)) {
+        SDL_free(data);
+        WIN_SetError("SetProp() failed");
+        return -1;
+    }
+
+    /* Set up the window proc function */
+    data->wndproc = (WNDPROC) GetWindowLongPtr(hwnd, GWLP_WNDPROC);
+    if (data->wndproc == NULL) {
+        data->wndproc = DefWindowProc;
+    } else {
+        SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR) WIN_WindowProc);
+    }
+
+    /* Fill in the SDL window with the window data */
+    {
+        POINT point;
+        if (ClientToScreen(hwnd, &point)) {
+            window->x = point.x;
+            window->y = point.y;
+        }
+    }
+    {
+        RECT rect;
+        if (GetClientRect(hwnd, &rect)) {
+            window->w = rect.right;
+            window->h = rect.bottom;
+        }
+    }
+    {
+        DWORD style = GetWindowLong(hwnd, GWL_STYLE);
+        if (style & WS_VISIBLE) {
+            window->flags |= SDL_WINDOW_SHOWN;
+        } else {
+            window->flags &= ~SDL_WINDOW_SHOWN;
+        }
+        if (style & (WS_BORDER | WS_THICKFRAME)) {
+            window->flags &= ~SDL_WINDOW_BORDERLESS;
+        } else {
+            window->flags |= SDL_WINDOW_BORDERLESS;
+        }
+        if (style & WS_THICKFRAME) {
+            window->flags |= SDL_WINDOW_RESIZABLE;
+        } else {
+            window->flags &= ~SDL_WINDOW_RESIZABLE;
+        }
+        if (style & WS_MAXIMIZE) {
+            window->flags |= SDL_WINDOW_MAXIMIZED;
+        } else {
+            window->flags &= ~SDL_WINDOW_MAXIMIZED;
+        }
+        if (style & WS_MINIMIZE) {
+            window->flags |= SDL_WINDOW_MINIMIZED;
+        } else {
+            window->flags &= ~SDL_WINDOW_MINIMIZED;
+        }
+    }
+
+    /* All done! */
+    window->driverdata = data;
+    return 0;
+}
+
 int
 WIN_CreateWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd;
+    LPTSTR title = NULL;
+    HWND top;
+    RECT rect;
+    DWORD style = 0;
+    int x, y;
+    int w, h;
+
+    if (window->title) {
+        title = WIN_UTF8ToString(window->title);
+    } else {
+        title = NULL;
+    }
+
+    if (window->flags & SDL_WINDOW_SHOWN) {
+        style |= WS_VISIBLE;
+    }
+    if ((window->flags & (SDL_WINDOW_FULLSCREEN | SDL_WINDOW_BORDERLESS))) {
+        style |= WS_POPUP;
+    } else {
+        style |= (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX);
+    }
+    if (window->flags & SDL_WINDOW_RESIZABLE) {
+        style |= (WS_THICKFRAME | WS_MAXIMIZEBOX);
+    }
+    if (window->flags & SDL_WINDOW_MAXIMIZED) {
+        style |= WS_MAXIMIZE;
+    }
+    if (window->flags & SDL_WINDOW_MINIMIZED) {
+        style |= WS_MINIMIZE;
+    }
+
+    /* Figure out what the window area will be */
+    if (window->flags & SDL_WINDOW_FULLSCREEN) {
+        top = HWND_TOPMOST;
+    } else {
+        top = HWND_NOTOPMOST;
+    }
+    rect.left = 0;
+    rect.top = 0;
+    rect.right = window->w;
+    rect.bottom = window->h;
+    AdjustWindowRectEx(&rect, style, FALSE, 0);
+    w = (rect.right - rect.left);
+    h = (rect.bottom - rect.top);
+
+    if ((window->flags & SDL_WINDOW_FULLSCREEN) ||
+        window->x == SDL_WINDOWPOS_CENTERED) {
+        x = (GetSystemMetrics(SM_CXSCREEN) - w) / 2;
+    } else if (window->x == SDL_WINDOWPOS_UNDEFINED) {
+        x = CW_USEDEFAULT;
+    } else {
+        x = window->x + rect.left;
+    }
+    if ((window->flags & SDL_WINDOW_FULLSCREEN) ||
+        window->y == SDL_WINDOWPOS_CENTERED) {
+        y = (GetSystemMetrics(SM_CYSCREEN) - h) / 2;
+    } else if (window->y == SDL_WINDOWPOS_UNDEFINED) {
+        y = CW_USEDEFAULT;
+    } else {
+        y = window->y + rect.top;
+    }
+
+    hwnd = CreateWindow(SDL_Appname,
+                        title ? title : TEXT(""),
+                        style, x, y, w, h, NULL, NULL, SDL_Instance, NULL);
+    if (title) {
+        SDL_free(title);
+    }
+
+    if (!hwnd) {
+        WIN_SetError("Couldn't create window");
+        return -1;
+    }
+
+    if (SetupWindowData(window, hwnd, TRUE) < 0) {
+        DestroyWindow(hwnd);
+        return -1;
+    }
+    return 0;
 }
 
 int
 WIN_CreateWindowFrom(_THIS, SDL_Window * window, const void *data)
 {
+    HWND hwnd = (HWND) data;
+    LPTSTR title;
+    int titleLen;
+
+    /* Query the title from the existing window */
+    titleLen = GetWindowTextLength(hwnd);
+    title = SDL_stack_alloc(TCHAR, titleLen + 1);
+    if (title) {
+        titleLen = GetWindowText(hwnd, title, titleLen);
+    } else {
+        titleLen = 0;
+    }
+    if (titleLen > 0) {
+        window->title = WIN_StringToUTF8(title);
+    }
+    if (title) {
+        SDL_stack_free(title);
+    }
+
+    if (SetupWindowData(window, hwnd, FALSE) < 0) {
+        return -1;
+    }
+    return 0;
 }
 
 void
 WIN_SetWindowTitle(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+    LPTSTR title;
+
+    if (window->title) {
+        title = WIN_UTF8ToString(window->title);
+    } else {
+        title = NULL;
+    }
+    SetWindowText(hwnd, title ? title : TEXT(""));
+    if (title) {
+        SDL_free(title);
+    }
 }
 
 void
 WIN_SetWindowPosition(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+    RECT rect;
+    DWORD style;
+    HWND top;
+    int x, y;
+    int w, h;
+
+    /* Figure out what the window area will be */
+    if (window->flags & SDL_WINDOW_FULLSCREEN) {
+        top = HWND_TOPMOST;
+    } else {
+        top = HWND_NOTOPMOST;
+    }
+    style = GetWindowLong(hwnd, GWL_STYLE);
+    rect.left = 0;
+    rect.top = 0;
+    rect.right = window->w;
+    rect.bottom = window->h;
+    AdjustWindowRectEx(&rect, style,
+                       (style & WS_CHILDWINDOW) ? FALSE : (GetMenu(hwnd) !=
+                                                           NULL), 0);
+    w = (rect.right - rect.left);
+    h = (rect.bottom - rect.top);
+
+    if ((window->flags & SDL_WINDOW_FULLSCREEN) ||
+        window->x == SDL_WINDOWPOS_CENTERED) {
+        x = (GetSystemMetrics(SM_CXSCREEN) - w) / 2;
+        window->x = x - rect.left;
+    } else {
+        x = window->x + rect.left;
+    }
+    if ((window->flags & SDL_WINDOW_FULLSCREEN) ||
+        window->y == SDL_WINDOWPOS_CENTERED) {
+        y = (GetSystemMetrics(SM_CYSCREEN) - h) / 2;
+        window->y = y - rect.top;
+    } else {
+        y = window->y + rect.top;
+    }
+    SetWindowPos(hwnd, top, x, y, h, w, (SWP_NOCOPYBITS | SWP_NOSIZE));
 }
 
 void
 WIN_SetWindowSize(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+    RECT rect;
+    DWORD style;
+    HWND top;
+    int w, h;
+
+    /* Figure out what the window area will be */
+    if (window->flags & SDL_WINDOW_FULLSCREEN) {
+        top = HWND_TOPMOST;
+    } else {
+        top = HWND_NOTOPMOST;
+    }
+    style = GetWindowLong(hwnd, GWL_STYLE);
+    rect.left = 0;
+    rect.top = 0;
+    rect.right = window->w;
+    rect.bottom = window->h;
+    AdjustWindowRectEx(&rect, style,
+                       (style & WS_CHILDWINDOW) ? FALSE : (GetMenu(hwnd) !=
+                                                           NULL), 0);
+    w = (rect.right - rect.left);
+    h = (rect.bottom - rect.top);
+
+    SetWindowPos(hwnd, top, 0, 0, h, w, (SWP_NOCOPYBITS | SWP_NOMOVE));
 }
 
 void
 WIN_ShowWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+
+    ShowWindow(hwnd, SW_SHOW);
 }
 
 void
 WIN_HideWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+
+    ShowWindow(hwnd, SW_HIDE);
 }
 
 void
 WIN_RaiseWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+    HWND top;
+
+    if (window->flags & SDL_WINDOW_FULLSCREEN) {
+        top = HWND_TOPMOST;
+    } else {
+        top = HWND_NOTOPMOST;
+    }
+    SetWindowPos(hwnd, top, 0, 0, 0, 0, (SWP_NOMOVE | SWP_NOSIZE));
 }
 
 void
 WIN_MaximizeWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+
+    ShowWindow(hwnd, SW_MAXIMIZE);
 }
 
 void
 WIN_MinimizeWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+
+    ShowWindow(hwnd, SW_MINIMIZE);
 }
 
 void
 WIN_RestoreWindow(_THIS, SDL_Window * window)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+
+    ShowWindow(hwnd, SW_RESTORE);
 }
 
 void
 WIN_SetWindowGrab(_THIS, SDL_Window * window)
 {
+    /* FIXME! */
 }
 
 void
 WIN_DestroyWindow(_THIS, SDL_Window * window)
 {
+    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
+
+    if (data) {
+        if (data->created) {
+            DestroyWindow(data->hwnd);
+        }
+        SDL_free(data);
+    }
 }
 
 SDL_bool
 WIN_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
 {
+    HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+/* FIXME! */
+#if 0
+    if (info->version.major <= SDL_MAJOR_VERSION) {
+        info->window = hwnd;
+        /* FIXME! */
+        info->hglrc = NULL;
+        return SDL_TRUE;
+    } else {
+        SDL_SetError("Application not compiled with SDL %d.%d\n",
+                     SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
+        return SDL_FALSE;
+    }
+#endif
 }
 
 /* vi: set ts=4 sw=4 expandtab: */
--- a/src/video/win32/SDL_win32window.h	Tue Jun 27 07:46:36 2006 +0000
+++ b/src/video/win32/SDL_win32window.h	Wed Jun 28 08:12:07 2006 +0000
@@ -27,6 +27,14 @@
 #include "../SDL_sysvideo.h"
 #include "SDL_win32video.h"
 
+typedef struct
+{
+    SDL_Window *window;
+    HWND hwnd;
+    WNDPROC wndproc;
+    BOOL created;
+} SDL_WindowData;
+
 extern int WIN_CreateWindow(_THIS, SDL_Window * window);
 extern int WIN_CreateWindowFrom(_THIS, SDL_Window * window, const void *data);
 extern void WIN_SetWindowTitle(_THIS, SDL_Window * window);
--- a/test/testwm2.c	Tue Jun 27 07:46:36 2006 +0000
+++ b/test/testwm2.c	Wed Jun 28 08:12:07 2006 +0000
@@ -64,10 +64,18 @@
     }
     for (i = 0; i < num_windows; ++i) {
         char title[32];
+        int x, y;
 
         SDL_snprintf(title, sizeof(title), "testwm %d", i + 1);
+        if (i == 0) {
+            x = SDL_WINDOWPOS_CENTERED;
+            y = SDL_WINDOWPOS_CENTERED;
+        } else {
+            x = SDL_WINDOWPOS_UNDEFINED;
+            y = SDL_WINDOWPOS_UNDEFINED;
+        }
         windows[i] =
-            SDL_CreateWindow(title, -1, -1, window_w, window_h,
+            SDL_CreateWindow(title, x, y, window_w, window_h,
                              SDL_WINDOW_SHOWN);
         if (!windows[i]) {
             fprintf(stderr, "Couldn't create window: %s\n", SDL_GetError());