import savejpeg example

windows-snapshot-tool/CMakeLists.txt

@@ -1,6 +1,7 @@
 cmake_minimum_required (VERSION 2.4)
 project (freeze)
 
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
 set(CMAKE_BINARY_DIR ${CMAKE_SOURCE_DIR}/bin)
 set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR})
 set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR})
@@ -8,10 +9,22 @@ set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR})
 add_definitions(-DUNICODE -D_UNICODE)
 SET( CMAKE_EXE_LINKER_FLAGS  "-mwindows" )
 
-include_directories("${PROJECT_SOURCE_DIR}")
+find_package( GDIPLUS )
+set(CMAKE_REQUIRED_DEFINITIONS -DGDIPLUS_LOWERCASE=${GDIPLUS_LOWERCASE})
+set(CMAKE_REQUIRED_INCLUDES ${GDIPLUS_INCLUDE_DIR})
+set(CMAKE_REQUIRED_LIBRARIES ${GDIPLUS_LIBRARY})
+
+#find_library(GDIPLUS gdiplus)
+#add_library(gdiplus SHARED)
+add_definitions(${GDIPLUS_DEFINITIONS})
+link_directories(${GDIPLUS_INCLUDE_DIR})
+link_libraries(${GDIPLUS_LIBRARIES})
+
+include_directories("${PROJECT_SOURCE_DIR} ${GDIPLUS_INCLUDE_DIR}")
 
 add_executable (freeze src/main.cpp src/resource.rc)
 
+target_link_libraries(freeze ${GDIPLUS})
 
 # mkdir build && cd build # rm -r CMakeCache.txt CMakeFiles/
 # cmake -DCMAKE_TOOLCHAIN_FILE=../Toolchain-cross-mingw32-linux.cmake ../

windows-snapshot-tool/cmake/FindGDIPLUS.cmake

@@ -0,0 +1,64 @@
+# - Find GDI+
+# Find the GDI+ includes and libraries
+#
+#  GDIPLUS_INCLUDE_DIR - where to find gdiplus.h
+#  GDIPLUS_LIBRARIES   - List of libraries when using GDI+.
+#  GDIPLUS_FOUND       - True if GDI+ found.
+
+if(GDIPLUS_INCLUDE_DIR)
+    # Already in cache, be silent
+    set(GDIPLUS_FIND_QUIETLY TRUE)
+endif(GDIPLUS_INCLUDE_DIR)
+
+macro(check_winsdk_root_dir key)
+  get_filename_component(CANDIDATE ${key} ABSOLUTE)
+  if (EXISTS ${CANDIDATE})
+    set(WINSDK_ROOT_DIR ${CANDIDATE})
+  endif()
+endmacro()
+
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Microsoft SDKs\\\\Windows\\\\v7.0;InstallationFolder]")
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Microsoft SDKs\\\\Windows\\\\v7.0A;InstallationFolder]")
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Microsoft SDKs\\\\Windows\\\\v7.1;InstallationFolder]")
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Microsoft SDKs\\\\Windows\\\\v7.1A;InstallationFolder]")
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Windows Kits\\\\Installed Roots;KitsRoot]")
+check_winsdk_root_dir("[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Microsoft\\\\Windows Kits\\\\Installed Roots;KitsRoot81]")
+
+find_path(GDIPLUS_INCLUDE_DIR
+    NAMES
+        GdiPlus.h
+        gdiplus.h
+    PATH_SUFFIXES
+        Include
+        Include/um
+        Include/shared
+    PATHS
+        "${WINSDK_ROOT_DIR}"
+    )
+if(EXISTS ${GDIPLUS_INCLUDE_DIR}/GdiPlus.h)
+    set(GDIPLUS_LOWERCASE 0 CACHE INTERNAL "Is GdiPlus.h spelt with lowercase?")
+else()
+    set(GDIPLUS_LOWERCASE 1 CACHE INTERNAL "Is GdiPlus.h spelt with lowercase?")
+endif()
+
+if (MINGW)
+	find_library(GDIPLUS_LIBRARY NAMES libgdiplus gdiplus)
+else(MINGW)
+	set(GDIPLUS_LIBRARY gdiplus)
+endif(MINGW)
+
+
+# Handle the QUIETLY and REQUIRED arguments and set GDIPLUS_FOUND to TRUE if
+# all listed variables are TRUE.
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GDIPLUS DEFAULT_MSG
+    GDIPLUS_INCLUDE_DIR GDIPLUS_LIBRARY)
+
+if(GDIPLUS_FOUND)
+    set(GDIPLUS_LIBRARIES ${GDIPLUS_LIBRARY})
+else(GDIPLUS_FOUND)
+    set(GDIPLUS_LIBRARIES)
+endif(GDIPLUS_FOUND)
+
+mark_as_advanced(GDIPLUS_INCLUDE_DIR GDIPLUS_LIBRARY GDIPLUS_LOWERCASE)
+

windows-snapshot-tool/src/main.cpp

@@ -1,5 +1,7 @@
 #include "resource.h"
-#include "LimitSingleInstance.h"
+#include <gdiplus.h>
+//#include "LimitSingleInstance.h"
+
 
 /*variables*/
 UINT WM_TASKBAR = 0;
@@ -478,3 +480,59 @@ int CaptureImage(HWND hWnd, const wchar_t* filename) {
     return 0;
 }
 
+int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
+{
+   using namespace Gdiplus;
+   UINT  num = 0;          // number of image encoders
+   UINT  size = 0;         // size of the image encoder array in bytes
+
+   ImageCodecInfo* pImageCodecInfo = NULL;
+
+   GetImageEncodersSize(&num, &size);
+   if(size == 0)
+      return -1;  // Failure
+
+   pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
+   if(pImageCodecInfo == NULL)
+      return -1;  // Failure
+
+   GetImageEncoders(num, size, pImageCodecInfo);
+
+   for(UINT j = 0; j < num; ++j)
+   {
+      if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
+      {
+         *pClsid = pImageCodecInfo[j].Clsid;
+         free(pImageCodecInfo);
+         return j;  // Success
+      }    
+   }
+
+   free(pImageCodecInfo);
+   return -1;  // Failure
+}
+
+
+/** Save compressed picture
+ *
+ * https://stackoverflow.com/questions/997175/how-can-i-take-a-screenshot-and-save-it-as-jpeg-on-windows
+ */
+void SaveJpeg(HBITMAP hBmp, LPCWSTR lpszFilename, ULONG uQuality)
+{
+    //using namespace Gdiplus;
+    Gdiplus::GpBitmap* pBitmap;
+    Gdiplus::DllExports::GdipCreateBitmapFromHBITMAP(hBmp, NULL, &pBitmap);
+
+    CLSID imageCLSID;
+    GetEncoderClsid(L"image/jpeg", &imageCLSID);
+
+    Gdiplus::EncoderParameters encoderParams;
+    encoderParams.Count = 1;
+    encoderParams.Parameter[0].NumberOfValues = 1;
+    encoderParams.Parameter[0].Guid  = Gdiplus::EncoderQuality;
+    encoderParams.Parameter[0].Type  = Gdiplus::EncoderParameterValueTypeLong;
+    encoderParams.Parameter[0].Value = &uQuality;
+
+    Gdiplus::DllExports::GdipSaveImageToFile(pBitmap, lpszFilename, &imageCLSID, &encoderParams);
+}
+