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https://github.com/reactos/reactos.git
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202 lines
4.5 KiB
C
202 lines
4.5 KiB
C
/* The idea of this test app is inspired from tutorial *
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* found at http://www.theparticle.com/pgraph.html *
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* *
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* Developed by: Aleksey Bragin <aleksey@studiocerebral.com> *
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* Version: 1.0 */
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#include <windows.h>
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#include <stdlib.h>
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#define W_WIDTH 320
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#define W_HEIGHT 240
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// special version of BITMAPINFO and LOGPALETTE for max of 256 palette entries
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typedef struct
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{
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BITMAPINFOHEADER bmiHeader;
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RGBQUAD bmiColors[256];
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} BITMAPINFO256;
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typedef struct {
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WORD palVersion;
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WORD palNumEntries;
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PALETTEENTRY palPalEntry[256];
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} LOGPALETTE256;
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// The only global variable --- contents of the DIBitmap
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BYTE* dibits;
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void GeneratePalette(RGBQUAD* p)
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{
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int i;
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for(i=0;i<256;i++)
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{
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p[i].rgbRed = i;
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p[i].rgbGreen = i;
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p[i].rgbBlue = i;
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p[i].rgbReserved = 0;
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}
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}
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void DoBlt(HBITMAP hBM)
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{
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HDC hDC,Context;
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HWND ActiveWindow;
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RECT dest;
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HBITMAP dflBmp;
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if((ActiveWindow = GetActiveWindow()) == NULL)
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return;
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hDC = GetDC(ActiveWindow);
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GetClientRect(ActiveWindow,&dest);
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Context = CreateCompatibleDC(0);
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dflBmp = SelectObject(Context, hBM);
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BitBlt(hDC, 0, 0, dest.right, dest.bottom, Context, 0, 0, SRCCOPY);
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SelectObject(Context, dflBmp);
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DeleteDC(Context);
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DeleteObject(dflBmp);
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ReleaseDC(ActiveWindow, hDC);
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}
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void UpdatePalette(HBITMAP hBM){
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int i,y;
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static unsigned int c=0;
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for(i=0;i<W_WIDTH;i++){
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for(y=0;y<=W_HEIGHT-1;y++)
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dibits[y*320+i] = c % 256;
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if (c > 512)
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c = 0;
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else
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c++; // It's operation of incrementing of c variable, not reference of a cool OO language :-)
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}
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DoBlt(hBM);
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}
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void InitBitmap(HBITMAP *hBM){
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HPALETTE PalHan;
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HWND ActiveWindow;
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HDC hDC;
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RGBQUAD palette[256];
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int i;
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BITMAPINFO256 bmInf;
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LOGPALETTE256 palInf;
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ActiveWindow = GetActiveWindow();
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hDC = GetDC(ActiveWindow);
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bmInf.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bmInf.bmiHeader.biWidth = W_WIDTH;
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bmInf.bmiHeader.biHeight = -abs(W_HEIGHT);
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bmInf.bmiHeader.biPlanes = 1;
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bmInf.bmiHeader.biBitCount = 8;
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bmInf.bmiHeader.biCompression = BI_RGB;
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bmInf.bmiHeader.biSizeImage = 0;
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bmInf.bmiHeader.biXPelsPerMeter = 0;
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bmInf.bmiHeader.biYPelsPerMeter = 0;
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bmInf.bmiHeader.biClrUsed = 256;
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bmInf.bmiHeader.biClrImportant = 256;
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GeneratePalette(palette);
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for(i=0;i<256;i++)
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bmInf.bmiColors[i] = palette[i];
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palInf.palVersion = 0x300;
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palInf.palNumEntries = 256;
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for(i=0;i<256;i++){
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palInf.palPalEntry[i].peRed = palette[i].rgbRed;
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palInf.palPalEntry[i].peGreen = palette[i].rgbGreen;
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palInf.palPalEntry[i].peBlue = palette[i].rgbBlue;
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palInf.palPalEntry[i].peFlags = PC_NOCOLLAPSE;
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}
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// Create palette
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PalHan = CreatePalette((LOGPALETTE*)&palInf);
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// Select it into hDC
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SelectPalette(hDC,PalHan,FALSE);
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// Realize palette in hDC
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RealizePalette(hDC);
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// Delete handle to palette
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DeleteObject(PalHan);
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// Create dib section
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*hBM = CreateDIBSection(hDC,(BITMAPINFO*)&bmInf,
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DIB_RGB_COLORS,(void**)&dibits,0,0);
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// Release dc
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ReleaseDC(ActiveWindow,hDC);
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}
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LRESULT CALLBACK WndProc(HWND hWnd,UINT msg, WPARAM wParam,LPARAM lParam)
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{
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switch(msg){
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case WM_DESTROY:
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PostQuitMessage(0);
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return 0;
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default:
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return DefWindowProc(hWnd,msg,wParam,lParam);
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}
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}
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int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpszCmdParam,int nCmdShow)
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{
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WNDCLASS WndClass;
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HWND hWnd;
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MSG msg;
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char szName[] = "Palette BitBlt test";
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BOOL exit = FALSE;
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HBITMAP hBM;
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// Create and register window class (not modified!!!!!!!!!!!1)
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WndClass.style = CS_HREDRAW|CS_VREDRAW|CS_OWNDC;
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WndClass.lpfnWndProc = WndProc;
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WndClass.cbClsExtra = 0;
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WndClass.cbWndExtra = 0;
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WndClass.hbrBackground = NULL;//GetStockObject(BLACK_BRUSH);
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WndClass.hIcon = NULL;//LoadIcon(hInstance,NULL);
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WndClass.hCursor = NULL;//LoadCursor(NULL,IDC_ARROW);
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WndClass.hInstance = hInstance;
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WndClass.lpszClassName = szName;
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WndClass.lpszMenuName = 0;
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RegisterClass(&WndClass);
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// Create and show window (change styles !!!!!!!!)
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hWnd = CreateWindow(szName, "ReactOS palette bitblt test",
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WS_CAPTION|WS_MINIMIZEBOX|WS_SYSMENU,
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CW_USEDEFAULT,CW_USEDEFAULT,W_WIDTH,W_HEIGHT,
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0,0,hInstance,0);
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ShowWindow(hWnd,nCmdShow);
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// Prepare bitmap to be bitblt
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InitBitmap(&hBM);
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// Main message loop
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while (!exit)
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{
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UpdatePalette(hBM);
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Sleep(200);
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if(PeekMessage(&msg,0,0,0,PM_NOREMOVE) == TRUE)
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{
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if (!GetMessage(&msg,0,0,0))
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exit = TRUE;
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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return msg.wParam;
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}
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