| | в msdn что-то вроде такого примера по обрезке, вставке и ресайза #ifndef UNICODE
#define UNICODE
#endif
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
VOID OnPaint(HDC hdc)
{
Graphics graphics(hdc);
Image image(L"1.jpg");
UINT width = image.GetWidth();
UINT height = image.GetHeight();
// Make the destination rectangle 30 percent wider and
// 30 percent taller than the original image.# не знаю как будет в 3 рааза меньше
// Put the upper-left corner of the destination
// rectangle at (20, 20).
Rect destinationRect(20, 20, (int)(0.5 * width), (int)(0.5 * height));
// Draw the image unaltered with its upper-left corner at (10, 10).
graphics.DrawImage(&image, 10, 10);
// Draw a portion of the image. Scale that portion of the image
// so that it fills the destination rectangle
graphics.DrawImage(
&image,
destinationRect,
0, 0, // upper-left corner of source rectangle
0.75 * width, // width of source rectangle
0.75 * height, // height of source rectangle
UnitPixel);
}
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PSTR, INT iCmdShow)
{
HWND hWnd;
MSG msg;
WNDCLASS wndClass;
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
// Initialize GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
wndClass.style = CS_HREDRAW | CS_VREDRAW;
wndClass.lpfnWndProc = WndProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = 0;
wndClass.hInstance = hInstance;
wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = TEXT("GettingStarted");
RegisterClass(&wndClass);
hWnd = CreateWindow(
TEXT("GettingStarted"), // window class name
TEXT("Getting Started"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL); // creation parameters
ShowWindow(hWnd, iCmdShow);
UpdateWindow(hWnd);
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
GdiplusShutdown(gdiplusToken);
return (int) msg.wParam;
} // WinMain
LRESULT CALLBACK WndProc(HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
switch(message)
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
OnPaint(hdc);
EndPaint(hWnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
} // WndProc |
если ещё убрал пару warnings приведя к (int)
Rect destinationRect(20, 20, (int)(0.5 * width), (int)(0.5 * height));
, то что-то насчёт двух таких-же
warning C4244: 'argument' : conversion from 'double' to 'INT', possible loss of data
не понял вообще что должно быть в последнем параметре
graphics.DrawImage(
&image,
destinationRect,
0, 0,
0.75 * width, 0.75 * height,
UnitPixel);
запускал подсоввя 128х128 1.jpg
было-бы интересно поразбираться,) но не интересно | |
