diff options
Diffstat (limited to 'plug-ins/screenshot/screenshot-win32.c')
| -rw-r--r-- | plug-ins/screenshot/screenshot-win32.c | 1278 |
1 files changed, 1278 insertions, 0 deletions
diff --git a/plug-ins/screenshot/screenshot-win32.c b/plug-ins/screenshot/screenshot-win32.c new file mode 100644 index 0000000..a9dd831 --- /dev/null +++ b/plug-ins/screenshot/screenshot-win32.c @@ -0,0 +1,1278 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * Screenshot plug-in + * Copyright 1998-2007 Sven Neumann <sven@gimp.org> + * Copyright 2003 Henrik Brix Andersen <brix@gimp.org> + * Copyright 2012 Simone Karin Lehmann - OS X patches + * Copyright 2018 Gil Eliyahu <gileli121@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <glib.h> + +#ifdef G_OS_WIN32 + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/* Necessary in order to have SetProcessDPIAware() defined. + * This value of _WIN32_WINNT corresponds to Windows 7, which is our + * minimum supported platform. + */ +#ifdef _WIN32_WINNT +#undef _WIN32_WINNT +#endif +#define _WIN32_WINNT 0x0601 +#include <windows.h> + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "screenshot.h" +#include "screenshot-win32.h" +#include "screenshot-win32-resource.h" + +#include "libgimp/stdplugins-intl.h" +#include "screenshot-win32-magnification-api.h" +#include "screenshot-win32-dwm-api.h" + +/* + * Application definitions + */ +#define SELECT_FRAME 0 +#define SELECT_CLIENT 1 +#define SELECT_WINDOW 2 + +#define SHOW_WINDOW FALSE +#define APP_NAME "plug_in_screenshot_win" +#define WM_DOCAPTURE (WM_USER + 100) + +/* Prototypes */ +void setCaptureType (int capType); +BOOL InitApplication (HINSTANCE hInstance); +BOOL InitInstance (HINSTANCE hInstance, + int nCmdShow); +int winsnapWinMain (void); + +/* File variables */ +static int captureType; +static char buffer[512]; +static guchar *capBytes = NULL; +static HWND mainHwnd = NULL; +static HINSTANCE hInst = NULL; +static HCURSOR selectCursor = 0; +static ICONINFO iconInfo; +static MAGIMAGEHEADER returnedSrcheader; +static int rectScreensCount = 0; + +static gint32 *image_id; + +static void sendBMPToGimp (HBITMAP hBMP, + HDC hDC, + RECT rect); +static int doWindowCapture (void); +static gboolean doCapture (HWND selectedHwnd); +static BOOL isWindowIsAboveCaptureRegion (HWND hwndWindow, + RECT rectCapture); +static gboolean doCaptureMagnificationAPI (HWND selectedHwnd, + RECT rect); +static void doCaptureMagnificationAPI_callback (HWND hwnd, + void *srcdata, + MAGIMAGEHEADER srcheader, + void *destdata, + MAGIMAGEHEADER destheader, + RECT unclipped, + RECT clipped, + HRGN dirty); +static gboolean doCaptureBitBlt (HWND selectedHwnd, + RECT rect); + +BOOL CALLBACK dialogProc (HWND, UINT, WPARAM, LPARAM); +LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); + +/* Data structure holding data between runs */ +typedef struct { + gint root; + guint delay; + gint decor; +} WinSnapValues; + +/* Default WinSnap values */ +static WinSnapValues winsnapvals = +{ + FALSE, + 0, + TRUE, +}; + +/* The dialog information */ +typedef struct { +#ifdef CAN_SET_DECOR + GtkWidget *decor_button; +#endif + GtkWidget *single_button; + GtkWidget *root_button; + GtkWidget *delay_spinner; +} WinSnapInterface; + +/* We create a DIB section to hold the grabbed area. The scanlines in + * DIB sections are aligned on a LONG (four byte) boundary. Its pixel + * data is in RGB (BGR actually) format, three bytes per pixel. + * + * GIMP uses no alignment for its pixel regions. The GIMP image we + * create is of type RGB, i.e. three bytes per pixel, too. Thus in + * order to be able to quickly transfer all of the image at a time, we + * must use a DIB section and pixel region the scanline width in + * bytes of which is evenly divisible with both 3 and 4. I.e. it must + * be a multiple of 12 bytes, or in pixels, a multiple of four pixels. + */ + +#define ROUND4(width) (((width-1)/4+1)*4) + + +gboolean +screenshot_win32_available (void) +{ + return TRUE; +} + +ScreenshotCapabilities +screenshot_win32_get_capabilities (void) +{ + return (SCREENSHOT_CAN_SHOOT_DECORATIONS | + SCREENSHOT_CAN_SHOOT_WINDOW); +} + +GimpPDBStatusType +screenshot_win32_shoot (ScreenshotValues *shootvals, + GdkScreen *screen, + gint32 *image_ID, + GError **error) +{ + GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR; + + /* leave "shootvals->monitor" alone until somebody patches the code + * to be able to get a monitor's color profile + */ + + image_id = image_ID; + + winsnapvals.delay = shootvals->screenshot_delay; + + if (shootvals->shoot_type == SHOOT_ROOT) + { + doCapture (0); + + status = GIMP_PDB_SUCCESS; + } + else if (shootvals->shoot_type == SHOOT_WINDOW) + { + status = 0 == doWindowCapture () ? GIMP_PDB_CANCEL : GIMP_PDB_SUCCESS; + } + else if (shootvals->shoot_type == SHOOT_REGION) + { + /* FIXME */ + } + + if (status == GIMP_PDB_SUCCESS) + { + GimpColorProfile *profile; + + /* XXX No idea if the "monitor" value is right at all, especially + * considering above comment. Just make so that it at least + * compiles! + */ + profile = gimp_screen_get_color_profile (screen, shootvals->monitor); + + if (profile) + { + gimp_image_set_color_profile (*image_ID, profile); + g_object_unref (profile); + } + } + + return status; +} + + + + + +/****************************************************************** + * GIMP format and transfer functions + ******************************************************************/ + +/* + * flipRedAndBlueBytes + * + * Microsoft has chosen to provide us a very nice (not!) + * interface for retrieving bitmap bits. DIBSections have + * RGB information as BGR instead. So, we have to swap + * the silly red and blue bytes before sending to the + * GIMP. + */ +static void +flipRedAndBlueBytes (int width, + int height) +{ + int i, j; + guchar *bufp; + guchar temp; + + j = 0; + while (j < height) { + i = width; + bufp = capBytes + j*ROUND4(width)*3; + while (i--) { + temp = bufp[2]; + bufp[2] = bufp[0]; + bufp[0] = temp; + bufp += 3; + } + j++; + } +} + +/* + * rgbaToRgbBytes + * + * Convert rgba array to rgb array + */ +static void +rgbaToRgbBytes (guchar *rgbBufp, + guchar *rgbaBufp, + int rgbaBufSize) +{ + int rgbPoint = 0, rgbaPoint; + + for (rgbaPoint = 0; rgbaPoint < rgbaBufSize; rgbaPoint += 4) + { + rgbBufp[rgbPoint++] = rgbaBufp[rgbaPoint]; + rgbBufp[rgbPoint++] = rgbaBufp[rgbaPoint + 1]; + rgbBufp[rgbPoint++] = rgbaBufp[rgbaPoint + 2]; + } +} + +/* + * sendBMPToGIMP + * + * Take the captured data and send it across + * to GIMP. + */ +static void +sendBMPToGimp (HBITMAP hBMP, + HDC hDC, + RECT rect) +{ + int width, height; + int imageType, layerType; + gint32 new_image_id; + gint32 layer_id; + GeglBuffer *buffer; + GeglRectangle *rectangle; + + /* Our width and height */ + width = (rect.right - rect.left); + height = (rect.bottom - rect.top); + + /* Check that we got the memory */ + if (!capBytes) + { + g_message (_("No data captured")); + return; + } + + /* Flip the red and blue bytes */ + flipRedAndBlueBytes (width, height); + + /* Set up the image and layer types */ + imageType = GIMP_RGB; + layerType = GIMP_RGB_IMAGE; + + /* Create the GIMP image and layers */ + new_image_id = gimp_image_new (width, height, imageType); + layer_id = gimp_layer_new (new_image_id, _("Background"), + ROUND4 (width), height, + layerType, + 100, + gimp_image_get_default_new_layer_mode (new_image_id)); + gimp_image_insert_layer (new_image_id, layer_id, -1, 0); + + /* make rectangle */ + rectangle = g_new (GeglRectangle, 1); + rectangle->x = 0; + rectangle->y = 0; + rectangle->width = ROUND4(width); + rectangle->height = height; + + /* get the buffer */ + buffer = gimp_drawable_get_buffer (layer_id); + + /* fill the buffer */ + gegl_buffer_set (buffer, rectangle, 0, NULL, (guchar *) capBytes, + GEGL_AUTO_ROWSTRIDE); + + /* flushing data */ + gegl_buffer_flush (buffer); + + /* Now resize the layer down to the correct size if necessary. */ + if (width != ROUND4 (width)) + { + gimp_layer_resize (layer_id, width, height, 0, 0); + gimp_image_resize (new_image_id, width, height, 0, 0); + } + + *image_id = new_image_id; + + return; +} + +/* + * doNonRootWindowCapture + * + * Capture a selected window. + * ENTRY POINT FOR WINSNAP NONROOT + * + */ +static int +doWindowCapture (void) +{ + /* Start up a standard Win32 + * message handling loop for + * selection of the window + * to be captured + */ + return winsnapWinMain (); +} + +/****************************************************************** + * Debug stuff + ******************************************************************/ + +/* + * formatWindowsError + * + * Format the latest Windows error message into + * a readable string. Store in the provided + * buffer. + */ +static void +formatWindowsError (char *buffer, + int buf_size) +{ + LPVOID lpMsgBuf; + + /* Format the message */ + FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | + FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, GetLastError(), + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + (LPTSTR) &lpMsgBuf, 0, NULL ); + + /* Copy to the buffer */ + strncpy(buffer, lpMsgBuf, buf_size - 1); + + LocalFree(lpMsgBuf); +} + +/****************************************************************** + * Bitmap capture and handling + ******************************************************************/ + +/* + * primDoWindowCapture + * + * The primitive window capture functionality. Accepts + * the two device contexts and the rectangle to be + * captured. + */ +static HBITMAP +primDoWindowCapture (HDC hdcWindow, + HDC hdcCompat, + RECT rect) +{ + HBITMAP hbmCopy; + HGDIOBJ oldObject; + BITMAPINFO bmi; + + int width = (rect.right - rect.left); + int height = (rect.bottom - rect.top); + + /* Create the bitmap info header */ + bmi.bmiHeader.biSize = sizeof (BITMAPINFOHEADER); + bmi.bmiHeader.biWidth = ROUND4(width); + bmi.bmiHeader.biHeight = -height; + bmi.bmiHeader.biPlanes = 1; + bmi.bmiHeader.biBitCount = 24; + bmi.bmiHeader.biCompression = BI_RGB; + bmi.bmiHeader.biSizeImage = 0; + bmi.bmiHeader.biXPelsPerMeter = + bmi.bmiHeader.biYPelsPerMeter = 0; + bmi.bmiHeader.biClrUsed = 0; + bmi.bmiHeader.biClrImportant = 0; + + /* Create the bitmap storage space */ + hbmCopy = CreateDIBSection (hdcCompat, + (BITMAPINFO *) &bmi, + DIB_RGB_COLORS, + (void **)&capBytes, NULL, 0); + if (!hbmCopy) + { + formatWindowsError(buffer, sizeof buffer); + g_error("Error creating DIB section: %s", buffer); + return NULL; + } + + /* Select the bitmap into the compatible DC. */ + oldObject = SelectObject (hdcCompat, hbmCopy); + if (!oldObject) + { + formatWindowsError (buffer, sizeof buffer); + g_error ("Error selecting object: %s", buffer); + return NULL; + } + + /* Copy the data from the application to the bitmap. Even if we did + * round up the width, BitBlt only the actual data. + */ + if (!BitBlt(hdcCompat, 0,0, + width, height, + hdcWindow, rect.left, rect.top, + SRCCOPY)) + { + formatWindowsError (buffer, sizeof buffer); + g_error ("Error copying bitmap: %s", buffer); + return NULL; + } + + /* Restore the original object */ + SelectObject (hdcCompat, oldObject); + + return hbmCopy; +} + +static BOOL CALLBACK +GetAccurateWindowRect_MonitorEnumProc (HMONITOR hMonitor, + HDC hdcMonitor, + LPRECT lprcMonitor, + LPARAM dwData) +{ + RECT **rectScreens = (RECT**) dwData; + + if (!lprcMonitor) return FALSE; + + if (! (*rectScreens)) + *rectScreens = (RECT*) g_malloc (sizeof (RECT)*(rectScreensCount+1)); + else + *rectScreens = (RECT*) g_realloc (rectScreens, + sizeof (RECT)*(rectScreensCount+1)); + + if (*rectScreens == NULL) + { + rectScreensCount = 0; + return FALSE; + } + + (*rectScreens)[rectScreensCount] = *lprcMonitor; + + rectScreensCount++; + + return TRUE; +} + +static BOOL +GetAccurateWindowRect (HWND hwndTarget, + RECT *outRect) +{ + HRESULT dwmResult; + WINDOWPLACEMENT windowplacment; + + ZeroMemory (outRect, sizeof (RECT)); + + /* First we try to get the rect using the dwm api. it will also avoid us from doing more ugly fixes when the window is maximized */ + if (LoadRequiredDwmFunctions ()) + { + dwmResult = DwmGetWindowAttribute (hwndTarget, DWMWA_EXTENDED_FRAME_BOUNDS, (PVOID) outRect, sizeof (RECT)); + UnloadRequiredDwmFunctions (); + if (dwmResult == S_OK) return TRUE; + } + + /* In this case, we did not got the rect from the dwm api so we try to get the rect with the normal function */ + if (GetWindowRect (hwndTarget, outRect)) + { + /* If the window is maximized then we need and can fix the rect variable + * (we need to do this if the rect isn't coming from dwm api) + */ + ZeroMemory (&windowplacment, sizeof (WINDOWPLACEMENT)); + if (GetWindowPlacement (hwndTarget, &windowplacment) && windowplacment.showCmd == SW_SHOWMAXIMIZED) + { + RECT *rectScreens = NULL; + int xCenter; + int yCenter; + int i; + + /* If this is not the first time we call this function for some + * reason then we reset the rectScreens count + */ + if (rectScreensCount) + rectScreensCount = 0; + + /* Get the screens rects */ + EnumDisplayMonitors (NULL, NULL, GetAccurateWindowRect_MonitorEnumProc, + (LPARAM) &rectScreens); + + /* If for some reason the array size is 0 then we fill it with the desktop rect */ + if (! rectScreensCount) + { + rectScreens = (RECT*) g_malloc (sizeof (RECT)); + if (! GetWindowRect (GetDesktopWindow (), rectScreens)) + { + /* error: could not get rect screens */ + g_free (rectScreens); + return FALSE; + } + + rectScreensCount = 1; + } + + xCenter = outRect->left + (outRect->right - outRect->left) / 2; + yCenter = outRect->top + (outRect->bottom - outRect->top) / 2; + + /* find on which screen the window exist */ + for (i = 0; i < rectScreensCount; i++) + if (xCenter > rectScreens[i].left && xCenter < rectScreens[i].right && + yCenter > rectScreens[i].top && yCenter < rectScreens[i].bottom) + break; + + if (i == rectScreensCount) + /* Error: did not found on which screen the window exist */ + return FALSE; + + if (rectScreens[i].left > outRect->left) outRect->left = rectScreens[i].left; + if (rectScreens[i].right < outRect->right) outRect->right = rectScreens[i].right; + if (rectScreens[i].top > outRect->top) outRect->top = rectScreens[i].top; + if (rectScreens[i].bottom < outRect->bottom) outRect->bottom = rectScreens[i].bottom; + + g_free (rectScreens); + } + + return TRUE; + } + + return FALSE; +} + +/* + * doCapture + * + * Do the capture. Accepts the window + * handle to be captured or the NULL value + * to specify the root window. + */ +static gboolean +doCapture (HWND selectedHwnd) +{ + RECT rect; + + /* Try and get everything out of the way before the + * capture. + */ + Sleep (500 + winsnapvals.delay * 1000); + + /* Are we capturing a window or the whole screen */ + if (selectedHwnd) + { + if (! GetAccurateWindowRect (selectedHwnd, &rect)) + /* For some reason it works only if we return here TRUE. strange... */ + return TRUE; + + /* First try to capture the window with the magnification api. + * This will solve the bug https://bugzilla.gnome.org/show_bug.cgi?id=793722/ + */ + + if (! doCaptureMagnificationAPI (selectedHwnd, rect)) + { + /* If for some reason this capture method failed then + * capture the window with the normal method: + */ + HWND previousHwnd = GetForegroundWindow (); + gboolean success; + + SetForegroundWindow (selectedHwnd); + BringWindowToTop (selectedHwnd); + + success = doCaptureBitBlt (selectedHwnd, rect); + + if (previousHwnd) + SetForegroundWindow (previousHwnd); + + return success; + } + + return TRUE; + + } + else + { + /* Get the screen's rectangle */ + rect.top = GetSystemMetrics (SM_YVIRTUALSCREEN); + rect.bottom = GetSystemMetrics (SM_YVIRTUALSCREEN) + GetSystemMetrics (SM_CYVIRTUALSCREEN); + rect.left = GetSystemMetrics (SM_XVIRTUALSCREEN); + rect.right = GetSystemMetrics (SM_XVIRTUALSCREEN) + GetSystemMetrics (SM_CXVIRTUALSCREEN); + + return doCaptureBitBlt (selectedHwnd, rect); + + } + + return FALSE; /* we should never get here... */ +} + +static gboolean +doCaptureBitBlt (HWND selectedHwnd, + RECT rect) +{ + + HDC hdcSrc; + HDC hdcCompat; + HBITMAP hbm; + + /* Get the device context for the whole screen + * even if we just want to capture a window. + * this will allow to capture applications that + * don't render to their main window's device + * context (e.g. browsers). + */ + hdcSrc = CreateDC (TEXT("DISPLAY"), NULL, NULL, NULL); + + if (!hdcSrc) + { + formatWindowsError(buffer, sizeof buffer); + g_error ("Error getting device context: %s", buffer); + return FALSE; + } + hdcCompat = CreateCompatibleDC (hdcSrc); + if (!hdcCompat) + { + formatWindowsError (buffer, sizeof buffer); + g_error ("Error getting compat device context: %s", buffer); + return FALSE; + } + + /* Do the window capture */ + hbm = primDoWindowCapture (hdcSrc, hdcCompat, rect); + if (!hbm) + return FALSE; + + /* Release the device context */ + ReleaseDC(selectedHwnd, hdcSrc); + + if (hbm == NULL) return FALSE; + + sendBMPToGimp (hbm, hdcCompat, rect); + + return TRUE; + +} + +static void +doCaptureMagnificationAPI_callback (HWND hwnd, + void *srcdata, + MAGIMAGEHEADER srcheader, + void *destdata, + MAGIMAGEHEADER destheader, + RECT unclipped, + RECT clipped, + HRGN dirty) +{ + if (!srcdata) return; + capBytes = (guchar*) malloc (sizeof (guchar)*srcheader.cbSize); + rgbaToRgbBytes (capBytes, srcdata, srcheader.cbSize); + returnedSrcheader = srcheader; +} + +static BOOL +isWindowIsAboveCaptureRegion (HWND hwndWindow, + RECT rectCapture) +{ + RECT rectWindow; + ZeroMemory (&rectWindow, sizeof (RECT)); + if (!GetWindowRect (hwndWindow, &rectWindow)) return FALSE; + if ( + ( + (rectWindow.left >= rectCapture.left && rectWindow.left < rectCapture.right) + || + (rectWindow.right <= rectCapture.right && rectWindow.right > rectCapture.left) + || + (rectWindow.left <= rectCapture.left && rectWindow.right >= rectCapture.right) + ) + && + ( + (rectWindow.top >= rectCapture.top && rectWindow.top < rectCapture.bottom) + || + (rectWindow.bottom <= rectCapture.bottom && rectWindow.bottom > rectCapture.top) + || + (rectWindow.top <= rectCapture.top && rectWindow.bottom >= rectCapture.bottom) + ) + ) + return TRUE; + else + return FALSE; +} + +static gboolean +doCaptureMagnificationAPI (HWND selectedHwnd, + RECT rect) +{ + HWND hwndMag; + HWND hwndHost; + HWND nextWindow; + HWND excludeWins[24]; + RECT round4Rect; + int excludeWinsCount = 0; + + if (!LoadMagnificationLibrary ()) return FALSE; + + if (!MagInitialize ()) return FALSE; + + round4Rect = rect; + round4Rect.right = round4Rect.left + ROUND4(round4Rect.right - round4Rect.left); + + /* Create the host window that will store the mag child window */ + hwndHost = CreateWindowEx (0x08000000 | 0x080000 | 0x80 | 0x20, APP_NAME, NULL, 0x80000000, + 0, 0, 0, 0, NULL, NULL, GetModuleHandle (NULL), NULL); + + if (!hwndHost) + { + MagUninitialize (); + return FALSE; + } + + SetLayeredWindowAttributes (hwndHost, (COLORREF)0, (BYTE)255, (DWORD)0x02); + + /* Create the mag child window inside the host window */ + hwndMag = CreateWindow (WC_MAGNIFIER, TEXT ("MagnifierWindow"), + WS_CHILD /*| MS_SHOWMAGNIFIEDCURSOR*/ /*| WS_VISIBLE*/, + 0, 0, round4Rect.right - round4Rect.left, round4Rect.bottom - round4Rect.top, + hwndHost, NULL, GetModuleHandle (NULL), NULL); + + /* Set the callback function that will be called by the api to get the pixels */ + if (!MagSetImageScalingCallback (hwndMag, (MagImageScalingCallback)doCaptureMagnificationAPI_callback)) + { + DestroyWindow (hwndHost); + MagUninitialize (); + return FALSE; + } + + /* Add only windows that above the target window */ + for (nextWindow = GetNextWindow (selectedHwnd, GW_HWNDPREV); nextWindow != NULL; nextWindow = GetNextWindow (nextWindow, GW_HWNDPREV)) + if (isWindowIsAboveCaptureRegion (nextWindow, rect)) + { + excludeWins[excludeWinsCount++] = nextWindow; + /* This api can't work with more than 24 windows. we stop on the 24 window */ + if (excludeWinsCount >= 24) break; + } + + if (excludeWinsCount) + MagSetWindowFilterList (hwndMag, MW_FILTERMODE_EXCLUDE, excludeWinsCount, excludeWins); + + /* Call the api to capture the window */ + capBytes = NULL; + + if (!MagSetWindowSource (hwndMag, round4Rect) || !capBytes) + { + DestroyWindow (hwndHost); + MagUninitialize (); + return FALSE; + } + + /* Send it to Gimp */ + sendBMPToGimp (NULL, NULL, rect); + + DestroyWindow (hwndHost); + MagUninitialize (); + + return TRUE; +} + +/****************************************************************** + * Win32 entry point and setup... + ******************************************************************/ + +#define DINV 3 + +/* + * highlightWindowFrame + * + * Highlight (or unhighlight) the specified + * window handle's frame. + */ +static void +highlightWindowFrame (HWND hWnd) +{ + HDC hdc; + RECT rc; + + if (!IsWindow (hWnd)) + return; + + hdc = GetWindowDC (hWnd); + GetWindowRect (hWnd, &rc); + OffsetRect (&rc, -rc.left, -rc.top); + + if (!IsRectEmpty (&rc)) + { + PatBlt (hdc, rc.left, rc.top, rc.right-rc.left, DINV, DSTINVERT); + PatBlt (hdc, rc.left, rc.bottom-DINV, DINV, -(rc.bottom-rc.top-2*DINV), + DSTINVERT); + PatBlt (hdc, rc.right-DINV, rc.top+DINV, DINV, rc.bottom-rc.top-2*DINV, + DSTINVERT); + PatBlt (hdc, rc.right, rc.bottom-DINV, -(rc.right-rc.left), DINV, + DSTINVERT); + } + + ReleaseDC (hWnd, hdc); + UpdateWindow (hWnd); +} + +/* + * setCaptureType + * + * Set the capture type. Should be one of: + * SELECT_FRAME + * SELECT_CLIENT + * SELECT_WINDOW + */ +void +setCaptureType (int capType) +{ + captureType = capType; +} + +/* + * myWindowFromPoint + * + * Map to the appropriate window from the + * specified point. The chosen window is + * based on the current capture type. + */ +static HWND +myWindowFromPoint (POINT pt) +{ + HWND myHwnd; + HWND nextHwnd; + + switch (captureType) + { + case SELECT_FRAME: + case SELECT_CLIENT: + nextHwnd = WindowFromPoint (pt); + + do { + myHwnd = nextHwnd; + nextHwnd = GetParent (myHwnd); + } while (nextHwnd); + + return myHwnd; + break; + + case SELECT_WINDOW: + return WindowFromPoint (pt); + break; + } + + return WindowFromPoint (pt); +} + +/* + * dialogProc + * + * The window procedure for the window + * selection dialog box. + */ +BOOL CALLBACK +dialogProc (HWND hwndDlg, + UINT msg, + WPARAM wParam, + LPARAM lParam) +{ + static int mouseCaptured; + static int buttonDown; + static HCURSOR oldCursor; + static RECT bitmapRect; + static HWND highlightedHwnd = NULL; + + switch (msg) + { + case WM_INITDIALOG: + { + int nonclientHeight; + HWND hwndGroup; + RECT dlgRect; + RECT clientRect; + RECT groupRect; + BITMAP bm; + + /* Set the mouse capture flag */ + buttonDown = 0; + mouseCaptured = 0; + + /* Calculate the bitmap dimensions */ + GetObject (iconInfo.hbmMask, sizeof(BITMAP), (VOID *)&bm); + + /* Calculate the dialog window dimensions */ + GetWindowRect (hwndDlg, &dlgRect); + + /* Calculate the group box dimensions */ + hwndGroup = GetDlgItem(hwndDlg, IDC_GROUP); + GetWindowRect (hwndGroup, &groupRect); + OffsetRect (&groupRect, -dlgRect.left, -dlgRect.top); + + /* The client's rectangle */ + GetClientRect (hwndDlg, &clientRect); + + /* The non-client height */ + nonclientHeight = (dlgRect.bottom - dlgRect.top) - + (clientRect.bottom - clientRect.top); + + /* Calculate the bitmap rectangle */ + bitmapRect.top = ((groupRect.top + groupRect.bottom) / 2) - + (bm.bmHeight / 2); + bitmapRect.top -= nonclientHeight; + bitmapRect.bottom = bitmapRect.top + bm.bmHeight; + bitmapRect.left = ((groupRect.left + groupRect.right) / 2) - (bm.bmWidth / 2); + bitmapRect.right = bitmapRect.left + bm.bmWidth; + } + break; + + case WM_LBUTTONDOWN: + /* Track the button down state */ + buttonDown = 1; + break; + + case WM_LBUTTONUP: + buttonDown = 0; + + /* If we have mouse captured + * we do this stuff. + */ + if (mouseCaptured) + { + HWND selectedHwnd; + POINT cursorPos; + + /* Release the capture */ + mouseCaptured = 0; + SetCursor (oldCursor); + ReleaseCapture (); + + /* Remove the highlight */ + if (highlightedHwnd) + highlightWindowFrame (highlightedHwnd); + RedrawWindow (hwndDlg, NULL, NULL, RDW_INVALIDATE); + + /* Return the selected window */ + GetCursorPos (&cursorPos); + selectedHwnd = myWindowFromPoint (cursorPos); + EndDialog (hwndDlg, (INT_PTR) selectedHwnd); + } + break; + + case WM_MOUSEMOVE: + /* If the mouse is captured, show + * the window which is tracking + * under the mouse position. + */ + if (mouseCaptured) + { + HWND currentHwnd; + POINT cursorPos; + + /* Get the window */ + GetCursorPos (&cursorPos); + currentHwnd = myWindowFromPoint (cursorPos); + + /* Do the highlighting */ + if (highlightedHwnd != currentHwnd) + { + if (highlightedHwnd) + highlightWindowFrame (highlightedHwnd); + if (currentHwnd) + highlightWindowFrame (currentHwnd); + highlightedHwnd = currentHwnd; + } + /* If the mouse has not been captured, + * try to figure out if we should capture + * the mouse. + */ + } + else if (buttonDown) + { + POINT cursorPos; + + /* Get the current client position */ + GetCursorPos (&cursorPos); + ScreenToClient (hwndDlg, &cursorPos); + + /* Check if within the rectangle formed + * by the bitmap + */ + if (PtInRect (&bitmapRect, cursorPos)) { + mouseCaptured = 1; + oldCursor = SetCursor (selectCursor); + SetCapture (hwndDlg); + RedrawWindow (hwndDlg, NULL, NULL, RDW_INVALIDATE | RDW_ERASE); + } + } + + break; + + case WM_PAINT: + { + HDC hDC; + PAINTSTRUCT ps; + + /* If the mouse is not captured draw + * the cursor image + */ + if (!mouseCaptured) + { + hDC = BeginPaint (hwndDlg, &ps); + DrawIconEx (hDC, bitmapRect.left, bitmapRect.top, selectCursor, + 0, 0, 0, NULL, DI_NORMAL); + EndPaint (hwndDlg, &ps); + } + } + break; + + case WM_COMMAND: + /* Handle the cancel button */ + switch (LOWORD (wParam)) + { + case IDCANCEL: + EndDialog (hwndDlg, 0); + return TRUE; + break; + } + + } + + return FALSE; +} + +///* Don't use the normal WinMain from gimp.h */ +//#define WinMain WinMain_no_thanks +//MAIN() +//#undef WinMain + +/* + * WinMain + * + * The standard gimp plug-in WinMain won't quite cut it for + * this plug-in. + */ +//int APIENTRY +//WinMain(HINSTANCE hInstance, +// HINSTANCE hPrevInstance, +// LPSTR lpCmdLine, +// int nCmdShow) +//{ +// /* +// * Normally, we would do all of the Windows-ish set up of +// * the window classes and stuff here in WinMain. But, +// * the only time we really need the window and message +// * queues is during the plug-in run. So, all of that will +// * be done during run(). This avoids all of the Windows +// * setup stuff for the query(). Stash the instance handle now +// * so it is available from the run() procedure. +// */ +// hInst = hInstance; +// +// /* +// * Now, call gimp_main... This is what the normal WinMain() +// * would do. +// */ +//// return gimp_main(&PLUG_IN_INFO, __argc, __argv); +//} + +/* + * InitApplication + * + * Initialize window data and register the window class + */ +BOOL +InitApplication (HINSTANCE hInstance) +{ + WNDCLASS wc; + BOOL retValue; + + /* Get some resources */ +#ifdef _MSC_VER + /* For some reason this works only with MSVC */ + selectCursor = LoadCursor (hInstance, MAKEINTRESOURCE(IDC_SELECT)); +#else + selectCursor = LoadCursor (NULL, IDC_CROSS); +#endif + GetIconInfo (selectCursor, &iconInfo); + + /* + * Fill in window class structure with parameters to describe + * the main window. + */ + wc.style = CS_HREDRAW | CS_VREDRAW; + wc.lpfnWndProc = (WNDPROC) WndProc; + wc.cbClsExtra = 0; + wc.cbWndExtra = 0; + wc.hInstance = hInstance; + wc.hIcon = LoadIcon (NULL, IDI_APPLICATION); + wc.hCursor = LoadCursor (NULL, IDC_ARROW); + wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1); + wc.lpszClassName = APP_NAME; + wc.lpszMenuName = NULL; + + /* Register the window class and stash success/failure code. */ + retValue = RegisterClass (&wc); + + /* Log error */ + if (!retValue) + { + formatWindowsError (buffer, sizeof buffer); + g_error ("Error registering class: %s", buffer); + return retValue; + } + + return retValue; +} + +/* + * InitInstance + * + * Create the main window for the application. + */ +BOOL +InitInstance (HINSTANCE hInstance, + int nCmdShow) +{ + HINSTANCE User32Library = LoadLibrary ("user32.dll"); + + if (User32Library) + { + typedef BOOL (WINAPI* SET_PROC_DPI_AWARE)(); + SET_PROC_DPI_AWARE SetProcessDPIAware; + + /* This line fix bug: https://bugzilla.gnome.org/show_bug.cgi?id=796121#c4 */ + SetProcessDPIAware = (SET_PROC_DPI_AWARE) GetProcAddress (User32Library, + "SetProcessDPIAware"); + if (SetProcessDPIAware) + SetProcessDPIAware(); + + FreeLibrary (User32Library); + } + + /* Create our window */ + mainHwnd = CreateWindow (APP_NAME, APP_NAME, WS_OVERLAPPEDWINDOW, + CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, + NULL, NULL, hInstance, NULL); + + if (!mainHwnd) + { + return (FALSE); + } + + ShowWindow (mainHwnd, nCmdShow); + UpdateWindow (mainHwnd); + + return TRUE; +} + +/* + * winsnapWinMain + * + * This is the function that represents the code that + * would normally reside in WinMain (see above). This + * function will get called during run() in order to set + * up the windowing environment necessary for WinSnap to + * operate. + */ +int +winsnapWinMain (void) +{ + MSG msg; + + /* Perform instance initialization */ + if (!InitApplication (hInst)) + return (FALSE); + + /* Perform application initialization */ + if (!InitInstance (hInst, SHOW_WINDOW)) + return (FALSE); + + /* Main message loop */ + while (GetMessage (&msg, NULL, 0, 0)) + { + TranslateMessage (&msg); + DispatchMessage (&msg); + } + + return (msg.wParam); +} + +/* + * WndProc + * + * Process window message for the main window. + */ +LRESULT CALLBACK +WndProc (HWND hwnd, + UINT message, + WPARAM wParam, + LPARAM lParam) +{ + HWND selectedHwnd; + + switch (message) + { + + case WM_CREATE: + /* The window is created... Send the capture message */ + PostMessage (hwnd, WM_DOCAPTURE, 0, 0); + break; + + case WM_DOCAPTURE: + /* Get the selected window handle */ + selectedHwnd = (HWND) DialogBox (hInst, MAKEINTRESOURCE(IDD_SELECT), + hwnd, (DLGPROC) dialogProc); + if (selectedHwnd) + doCapture (selectedHwnd); + + PostQuitMessage (selectedHwnd != NULL); + + break; + + case WM_DESTROY: + PostQuitMessage (0); + break; + + default: + return (DefWindowProc (hwnd, message, wParam, lParam)); + } + + return 0; +} + +#endif /* G_OS_WIN32 */ |