207 HDC hdcScreen = ::CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
208 HDC hdcMem = ::CreateCompatibleDC(hdcScreen);
209 HBITMAP hbitmap;
210 HBITMAP hOldBitmap;
211 HPALETTE hOldPalette = NULL;
212 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
213
214 // create an offscreen bitmap
215 hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
216 if (hbitmap == NULL) {
217 throw std::bad_alloc();
218 }
219 hOldBitmap = (HBITMAP)::SelectObject(hdcMem, hbitmap);
220
221 // REMIND: not multimon-friendly...
222 int primaryIndex = AwtWin32GraphicsDevice::GetDefaultDeviceIndex();
223 hOldPalette =
224 AwtWin32GraphicsDevice::SelectPalette(hdcMem, primaryIndex);
225 AwtWin32GraphicsDevice::RealizePalette(hdcMem, primaryIndex);
226
227 Devices::InstanceAccess devices;
228 AwtWin32GraphicsDevice *device = devices->GetDevice(primaryIndex);
229 int sWidth = (device == NULL) ? width : device->ScaleUpX(width);
230 int sHeight = (device == NULL) ? height : device->ScaleUpY(height);
231
232 // copy screen image to offscreen bitmap
233 // CAPTUREBLT flag is required to capture WS_EX_LAYERED windows' contents
234 // correctly on Win2K/XP
235 if (width == sWidth && height == sHeight) {
236 VERIFY(::BitBlt(hdcMem, 0, 0, width, height, hdcScreen, x, y,
237 SRCCOPY | CAPTUREBLT) != 0);
238 } else {
239 int sX = (device == NULL) ? x : device->ScaleUpX(x);
240 int sY = (device == NULL) ? y : device->ScaleUpY(y);
241 VERIFY(::StretchBlt(hdcMem, 0, 0, width, height,
242 hdcScreen, sX, sY, sWidth, sHeight,
243 SRCCOPY | CAPTUREBLT) != 0);
244 }
245
246 static const int BITS_PER_PIXEL = 32;
247 static const int BYTES_PER_PIXEL = BITS_PER_PIXEL/8;
248
249 if (!IS_SAFE_SIZE_MUL(width, height)) throw std::bad_alloc();
250 int numPixels = width*height;
251 if (!IS_SAFE_SIZE_MUL(BYTES_PER_PIXEL, numPixels)) throw std::bad_alloc();
252 int pixelDataSize = BYTES_PER_PIXEL*numPixels;
253 DASSERT(pixelDataSize > 0 && pixelDataSize % 4 == 0);
254 // allocate memory for BITMAPINFO + pixel data
255 // 4620932: When using BI_BITFIELDS, GetDIBits expects an array of 3
256 // RGBQUADS to follow the BITMAPINFOHEADER, but we were only allocating the
257 // 1 that is included in BITMAPINFO. Thus, GetDIBits was writing off the
258 // end of our block of memory. Now we allocate sufficient memory.
259 // See MSDN docs for BITMAPINFOHEADER -bchristi
260
261 if (!IS_SAFE_SIZE_ADD(sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD), pixelDataSize)) {
262 throw std::bad_alloc();
263 }
264 BITMAPINFO * pinfo = (BITMAPINFO *)(new BYTE[sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD) + pixelDataSize]);
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207 HDC hdcScreen = ::CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
208 HDC hdcMem = ::CreateCompatibleDC(hdcScreen);
209 HBITMAP hbitmap;
210 HBITMAP hOldBitmap;
211 HPALETTE hOldPalette = NULL;
212 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
213
214 // create an offscreen bitmap
215 hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
216 if (hbitmap == NULL) {
217 throw std::bad_alloc();
218 }
219 hOldBitmap = (HBITMAP)::SelectObject(hdcMem, hbitmap);
220
221 // REMIND: not multimon-friendly...
222 int primaryIndex = AwtWin32GraphicsDevice::GetDefaultDeviceIndex();
223 hOldPalette =
224 AwtWin32GraphicsDevice::SelectPalette(hdcMem, primaryIndex);
225 AwtWin32GraphicsDevice::RealizePalette(hdcMem, primaryIndex);
226
227 // copy screen image to offscreen bitmap
228 // CAPTUREBLT flag is required to capture WS_EX_LAYERED windows' contents
229 // correctly on Win2K/XP
230
231 VERIFY(::BitBlt(hdcMem, 0, 0, width, height, hdcScreen, x, y,
232 SRCCOPY | CAPTUREBLT) != 0);
233
234 static const int BITS_PER_PIXEL = 32;
235 static const int BYTES_PER_PIXEL = BITS_PER_PIXEL/8;
236
237 if (!IS_SAFE_SIZE_MUL(width, height)) throw std::bad_alloc();
238 int numPixels = width*height;
239 if (!IS_SAFE_SIZE_MUL(BYTES_PER_PIXEL, numPixels)) throw std::bad_alloc();
240 int pixelDataSize = BYTES_PER_PIXEL*numPixels;
241 DASSERT(pixelDataSize > 0 && pixelDataSize % 4 == 0);
242 // allocate memory for BITMAPINFO + pixel data
243 // 4620932: When using BI_BITFIELDS, GetDIBits expects an array of 3
244 // RGBQUADS to follow the BITMAPINFOHEADER, but we were only allocating the
245 // 1 that is included in BITMAPINFO. Thus, GetDIBits was writing off the
246 // end of our block of memory. Now we allocate sufficient memory.
247 // See MSDN docs for BITMAPINFOHEADER -bchristi
248
249 if (!IS_SAFE_SIZE_ADD(sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD), pixelDataSize)) {
250 throw std::bad_alloc();
251 }
252 BITMAPINFO * pinfo = (BITMAPINFO *)(new BYTE[sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD) + pixelDataSize]);
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