+++ /dev/null
-
-// ------------------------------------------------------------------
-// Windows 2000 Graphics API Black Book
-// Chapter 2 - Listing 2.1 (PatBlt Tracking Rect Demo)
-//
-// Created by Damon Chandler <dmc27@ee.cornell.edu>
-// Updates can be downloaded at: <www.coriolis.com>
-//
-// Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
-// if you have any questions about this code.
-// ------------------------------------------------------------------
-
-
-//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
-#include <windows.h>
-//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
-
-
-HINSTANCE HInst;
-const char* WndClassName = "GMainWnd";
-LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
- LPARAM LParam);
-
-
-int APIENTRY WinMain(HINSTANCE HInstance, HINSTANCE, LPTSTR,
- int nCmdShow)
-{
- HInst = HInstance;
-
- WNDCLASS wc;
- memset(&wc, 0, sizeof(WNDCLASS));
-
- wc.style = CS_VREDRAW | CS_HREDRAW;
- wc.lpszClassName = WndClassName;
- wc.lpfnWndProc = MainWndProc;
- wc.hInstance = HInstance;
- wc.hCursor = LoadCursor(NULL, IDC_ARROW);
- wc.hbrBackground = static_cast<HBRUSH>(
- GetStockObject(BLACK_BRUSH)
- );
-
- if (RegisterClass(&wc))
- {
- HWND HWnd =
- CreateWindow(WndClassName,
- TEXT("PatBlt Tracking Rect Demo"),
- WS_OVERLAPPEDWINDOW | WS_CAPTION |
- WS_VISIBLE | WS_CLIPCHILDREN,
- CW_USEDEFAULT, CW_USEDEFAULT, 640, 480,
- NULL, NULL, HInst, NULL);
-
- if (HWnd)
- {
- ShowWindow(HWnd, nCmdShow);
- UpdateWindow(HWnd);
-
- MSG msg;
- while (GetMessage(&msg, NULL, 0, 0))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
- }
- return 0;
-}
-//------------------------------------------------------------------
-
-
-// image related
-HDC HMemDC = NULL;
-HBITMAP HOldBmp = NULL;
-const char* filename = "PENGUIN.BMP";
-RECT RImage = {225, 110, 225, 110};
-
-// tracking related
-bool is_tracking = false;
-HDC HScreenDC = NULL;
-POINT PMouse = {0, 0};
-RECT RTrack = {0, 0, 0, 0};
-const int line_width = 5;
-
-
-// utility function to map to/from window coordinates
-void MapRect(IN HWND HWndFrom, IN HWND HWndTo, IN OUT RECT& RMap)
-{
- MapWindowPoints(
- HWndFrom, HWndTo,
- reinterpret_cast<LPPOINT>(&RMap), 2
- );
-}
-//------------------------------------------------------------------
-
-
-// utility function that uses the PatBlt function to
-// render a tracking rectangle
-void RenderTrackingRect(IN HDC HDestDC, IN const RECT& RRender)
-{
- const int width = RRender.right - RRender.left;
- const int height = RRender.bottom - RRender.top;
- const DWORD dwROP3 = DSTINVERT; // experiment with others
-
- // render top bar
- PatBlt(HDestDC,
- RRender.left, RRender.top,
- width, line_width,
- dwROP3);
- // render bottom bar
- PatBlt(HDestDC,
- RRender.left, RRender.bottom - line_width,
- width, line_width,
- dwROP3);
- // render left bar
- PatBlt(HDestDC,
- RRender.left, RRender.top + line_width,
- line_width, height - (2 * line_width),
- dwROP3);
- // render right bar
- PatBlt(HDestDC,
- RRender.right - line_width, RRender.top + line_width,
- line_width, height - (2 * line_width),
- dwROP3);
-
-}
-//------------------------------------------------------------------
-
-
-LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
- LPARAM LParam)
-{
- switch (Msg)
- {
- case WM_CREATE:
- {
- // create a memory DC
- HMemDC = CreateCompatibleDC(NULL);
- if (HMemDC)
- {
- // load the penguin bitmap
- HBITMAP HBmp = static_cast<HBITMAP>(
- LoadImage(HInst, filename, IMAGE_BITMAP, 0, 0,
- LR_LOADFROMFILE | LR_DEFAULTSIZE)
- );
- if (HBmp)
- {
- // get the bitmap's dimensions
- BITMAP bmp;
- if (GetObject(HBmp, sizeof(BITMAP), &bmp))
- {
- RImage.right += bmp.bmWidth;
- RImage.bottom += bmp.bmHeight;
-
- // realize the bitmap
- HOldBmp = static_cast<HBITMAP>(
- SelectObject(HMemDC, HBmp)
- );
- }
- else DeleteObject(HBmp);
- }
- }
- break;
- }
- case WM_LBUTTONDOWN:
- {
- PMouse.x = LOWORD(LParam);
- PMouse.y = HIWORD(LParam);
-
- RECT RClient;
- if (PtInRect(&RImage, PMouse) &&
- GetClientRect(HWnd, &RClient))
- {
- MapRect(HWnd, HWND_DESKTOP, RClient);
- ClipCursor(&RClient);
-
- // grab a handle to the screen DC and clip
- // all output to the client area of our window
- HScreenDC = GetDC(NULL);
- HRGN HClipRgn = CreateRectRgnIndirect(&RClient);
- SelectClipRgn(HScreenDC, HClipRgn);
- DeleteObject(HClipRgn);
-
- CopyRect(&RTrack, &RImage);
- MapRect(HWnd, HWND_DESKTOP, RTrack);
-
- // render the first tracking rect
- RenderTrackingRect(HScreenDC, RTrack);
- is_tracking = true;
- }
- break;
- }
- case WM_MOUSEMOVE:
- {
- if (HScreenDC && is_tracking)
- {
- POINT PCurrent = {LOWORD(LParam), HIWORD(LParam)};
- const int dX = PCurrent.x - PMouse.x;
- const int dY = PCurrent.y - PMouse.y;
-
- // erase the previous rectangle
- RenderTrackingRect(HScreenDC, RTrack);
- // update the postion
- OffsetRect(&RTrack, dX, dY);
- // render the new tracking rectangle
- RenderTrackingRect(HScreenDC, RTrack);
-
- // update the mouse position
- memcpy(&PMouse, &PCurrent, sizeof(POINT));
- }
- break;
- }
- case WM_LBUTTONUP:
- {
- // clean up
- if (is_tracking)
- {
- is_tracking = false;
- SelectClipRgn(HScreenDC, NULL);
- ReleaseDC(NULL, HScreenDC);
-
- InvalidateRect(HWnd, &RImage, true);
- CopyRect(&RImage, &RTrack);
- MapRect(HWND_DESKTOP, HWnd, RImage);
- InvalidateRect(HWnd, &RImage, true);
-
- ClipCursor(NULL);
- }
- break;
- }
- case WM_PAINT:
- {
- PAINTSTRUCT ps;
- HDC Hdc = BeginPaint(HWnd, &ps);
- try
- {
- //
- // TODO: Add palette support...
- //
-
- // render the penguin
- BitBlt(Hdc, RImage.left, RImage.top,
- RImage.right - RImage.left,
- RImage.bottom - RImage.top,
- HMemDC, 0, 0,
- SRCCOPY);
- }
- catch (...)
- {
- EndPaint(HWnd, &ps);
- }
- EndPaint(HWnd, &ps);
- break;
- }
- case WM_DESTROY:
- {
- // clean up
- if (HOldBmp)
- {
- DeleteObject(SelectObject(HMemDC, HOldBmp));
- }
- if (HMemDC)
- {
- DeleteDC(HMemDC);
- }
- PostQuitMessage(0);
- return 0;
- }
- }
- return DefWindowProc(HWnd, Msg, WParam, LParam);
-}
-//------------------------------------------------------------------
projects / reactos.git / blobdiff