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1065 lines
23 KiB
1065 lines
23 KiB
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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Draw.c
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Abstract:
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Win32 application to display performance statictics. This routine implements
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graphics output for display windows.
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Author:
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Mark Enstrom (marke)
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Environment:
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Win32
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Revision History:
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10-07-92 Initial version
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--*/
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//
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// set variable to define global variables
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//
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <math.h>
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#include <errno.h>
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#include "pperf.h"
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extern WINPERF_INFO WinperfInfo;
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extern ULONG NumberOfProcessors, LogIt;
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BOOLEAN
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FitPerfWindows(
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IN HWND hWnd,
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IN HDC hDC,
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IN PDISPLAY_ITEM DisplayItems
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)
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/*++
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Routine Description:
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Calculate all parameters to fit the given number of
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windows into the app window. Fill out the data structure
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for each sub-window
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Arguments:
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hDC - Screen context
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DisplayItems - List of display structures
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NumberOfWindows - Number of sub-windows
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Return Value:
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Status
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Revision History:
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02-17-91 Initial code
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--*/
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{
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RECT ClientRect;
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int cx,cy;
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UINT Index;
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int ActiveWindows,IndexX,IndexY;
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int WindowsX,WindowsY,WindowWidth,WindowHeight;
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int LastRowWidth,LoopWidth;
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double fWindowsX,fActiveWindows,fcx,fcy;
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PDISPLAY_ITEM pPerf;
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//
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// Find out the client area bounds
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//
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GetClientRect(hWnd,&ClientRect);
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cx = ClientRect.right;
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cy = ClientRect.bottom - 2; // subtract 2 to give a little more border
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//
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// Find out how many perf windows are active
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//
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ActiveWindows = 0;
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for (pPerf=DisplayItems; pPerf; pPerf = pPerf->Next) {
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if (pPerf->Display == TRUE) {
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ActiveWindows++;
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}
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}
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//
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// Return if there are no active windows to display
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//
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if (ActiveWindows == 0) {
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return(TRUE);
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}
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//
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// Now convert the window dimensions to floating point and
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// then take the square root of the window dimension to find
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// out the number of windows in the x direction
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//
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fActiveWindows = 1.0 * ActiveWindows;
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fcx = 1.0 * cx;
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fcy = 1.0 * cy;
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if (fcy != 0.0) {
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fWindowsX = sqrt((fcx * fActiveWindows) / fcy);
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} else {
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//
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// If fcy = 0 then return since this is an error condition that
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// would cause a divide by zero.
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//
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return(FALSE);
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}
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//
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// convert back to integer
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//
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WindowsX = (int)fWindowsX;
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if (WindowsX == 0) {
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WindowsX = 1;
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} else if (WindowsX > ActiveWindows) {
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WindowsX = ActiveWindows;
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}
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WindowsY = ActiveWindows / WindowsX;
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//
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// Add on extra line to Y to take care of the left over windows ie:
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// if there are 15 active windows and the x number = 7 then y = 2 with 1
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// left over.
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//
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Index = ActiveWindows - (WindowsX * WindowsY);
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if (Index > 0) {
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WindowsY++;
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LastRowWidth = cx / Index;
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} else {
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LastRowWidth = cx / WindowsX;
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}
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WindowWidth = cx / WindowsX;
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WindowHeight = cy / WindowsY;
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//
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// Assign positions for each active window
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//
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pPerf = DisplayItems;
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for (IndexY=0;IndexY<WindowsY;IndexY++) {
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for (IndexX=0;IndexX<WindowsX;IndexX++) {
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//
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// Find the next active display item
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//
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while (pPerf->Display != TRUE && pPerf) {
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pPerf = pPerf->Next;
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}
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if (!pPerf) {
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break;
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}
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//
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// Add y fixup for last row
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//
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if (IndexY == WindowsY - 1) {
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LoopWidth = LastRowWidth;
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} else {
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LoopWidth = WindowWidth;
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}
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pPerf->PositionX = LoopWidth * IndexX;
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pPerf->PositionY = WindowHeight * IndexY + 1; // +1 for more top border
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pPerf->Width = LoopWidth - 1;
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pPerf->Height = WindowHeight - 1;
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//
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// Last Column fix-up to use all of window.
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//
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if (IndexX == WindowsX - 1) {
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pPerf->Width = cx - pPerf->PositionX - 1;
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}
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pPerf = pPerf->Next;
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if (!pPerf) {
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break;
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}
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}
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if (!pPerf) {
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break;
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}
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}
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return(TRUE);
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}
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VOID
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CalcDrawFrame(
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PDISPLAY_ITEM DisplayItem
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)
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/*++
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Routine Description:
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Calculate all borders for graphics windows
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Arguments:
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DisplayItem - Data structure with all perf window info
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Return Value:
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status of operation
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Revision History:
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03-21-91 Initial code
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--*/
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{
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LONG x1,x2,y1,y2;
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LONG gx1,gx2,gy1,gy2;
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LONG tx1,tx2,ty1,ty2;
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LONG GraphHeight,TextHeight;
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BOOLEAN TextWindow;
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double fx1,fx2,fy1;
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//
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// Draw a 3-d stand out box around item window
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//
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x1 = DisplayItem->PositionX + 2;
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x2 = DisplayItem->PositionX + DisplayItem->Width - 2;
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y1 = DisplayItem->PositionY + 2;
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y2 = DisplayItem->PositionY + DisplayItem->Height - 2;
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//
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// find out in there is enough space for a text window
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//
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if ((y2 - y1 - 12) > 30) {
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TextWindow = TRUE;
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//
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// Calculate dimensions for a text window and a graphics window
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//
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// fx1 = portion of the window - bordres and free space
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//
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// fx2 = fraction of window used for graphics
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//
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// fy1 = fraction of winddow used for text
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//
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fx1 = (y2 - y1 - 10);
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fx2 = fx1 * 0.6666;
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fy1 = fx1 * 0.3333;
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GraphHeight = (LONG)fx2;
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TextHeight = (LONG)fy1;
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if (TextHeight > 20) {
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GraphHeight += TextHeight-20;
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TextHeight = 20;
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}
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//
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// Calculate window boundaries
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//
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gx1 = x1 + 4;
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gx2 = x2 - 4;
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gy1 = y1 + 4;
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gy2 = y1 + 4 + GraphHeight + 1;
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tx1 = x1 + 4;
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tx2 = x2 - 4;
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ty1 = gy2 + 1 + 2 + 1; // border,free space,border
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ty2 = gy2 + TextHeight + 1;
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} else {
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TextWindow = FALSE;
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GraphHeight = y2 - y1 - 10;
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gx1 = x1 + 4;
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gx2 = x2 - 4;
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gy1 = y1 + 4;
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gy2 = y2 - 4;
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tx1 = tx2 = ty1 = ty2 = 0;
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}
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//
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// Fill in structures for drawing text and graphics
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//
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DisplayItem->Border.left = x1;
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DisplayItem->Border.right = x2;
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DisplayItem->Border.top = y1;
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DisplayItem->Border.bottom = y2;
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DisplayItem->GraphBorder.left = gx1;
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DisplayItem->GraphBorder.right = gx2;
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DisplayItem->GraphBorder.top = gy1;
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DisplayItem->GraphBorder.bottom = gy2;
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DisplayItem->TextBorder.left = tx1;
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DisplayItem->TextBorder.right = tx2;
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DisplayItem->TextBorder.top = ty1;
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DisplayItem->TextBorder.bottom = ty2;
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}
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VOID
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DrawFrame(
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HDC hDC,
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PDISPLAY_ITEM DisplayItem
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)
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/*++
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Routine Description:
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Draw the window frame for a performance window
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Arguments:
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hDC - Device Context for window
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DisplayItem - Data structure with all perf window info
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Return Value:
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status of operation
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Revision History:
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03-21-91 Initial code
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--*/
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{
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RECT DrawRect;
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LONG x1,x2,y1,y2;
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LONG gx1,gx2,gy1,gy2;
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LONG tx1,tx2,ty1,ty2;
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//
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// Draw a 3-d stand out box around item window
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//
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x1 = DisplayItem->Border.left;
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x2 = DisplayItem->Border.right;
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y1 = DisplayItem->Border.top;
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y2 = DisplayItem->Border.bottom;
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gx1 = DisplayItem->GraphBorder.left;
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gx2 = DisplayItem->GraphBorder.right;
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gy1 = DisplayItem->GraphBorder.top;
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gy2 = DisplayItem->GraphBorder.bottom;
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tx1 = DisplayItem->TextBorder.left;
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tx2 = DisplayItem->TextBorder.right;
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ty1 = DisplayItem->TextBorder.top;
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ty2 = DisplayItem->TextBorder.bottom;
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//
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// Draw top border in light shade
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//
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DrawRect.left = x1;
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DrawRect.right = x2;
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DrawRect.top = y1;
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DrawRect.bottom = y1 + 2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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//
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// Draw Left border in light shade
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//
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DrawRect.left = x1;
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DrawRect.right = x1 + 2;
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DrawRect.top = y1;
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DrawRect.bottom = y2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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//
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// Draw right border in dark shade
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//
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DrawRect.left = x2 - 2;
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DrawRect.right = x2;
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DrawRect.top = y1;
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DrawRect.bottom = y2;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// draw bottom in dark shade
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//
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DrawRect.left = x1;
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DrawRect.right = x2;
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DrawRect.top = y2-2;
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DrawRect.bottom = y2;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// Draw graphics area single border
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//
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//
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// Draw top border in dark shade
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//
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DrawRect.left = gx1;
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DrawRect.right = gx2;
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DrawRect.top = gy1;
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DrawRect.bottom = gy1+1;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// Draw Left border in Dark shade
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//
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DrawRect.left = gx1;
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DrawRect.right = gx1 + 1;
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DrawRect.top = gy1;
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DrawRect.bottom = gy2;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// Draw right border in Light shade
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//
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DrawRect.left = gx2 - 1;
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DrawRect.right = gx2;
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DrawRect.top = gy1;
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DrawRect.bottom = gy2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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//
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// draw bottom in Light shade
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//
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DrawRect.left = gx1;
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DrawRect.right = gx2;
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DrawRect.top = gy2-1;
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DrawRect.bottom = gy2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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if (tx2 > 0) {
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//
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// Draw top border in Dark shade
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//
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DrawRect.left = tx1;
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DrawRect.right = tx2;
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DrawRect.top = ty1;
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DrawRect.bottom = ty1 + 1;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// Draw Left border in Dark shade
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//
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DrawRect.left = tx1;
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DrawRect.right = tx1 + 1;
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DrawRect.top = ty1;
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DrawRect.bottom = ty2;
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FillRect(hDC,&DrawRect,WinperfInfo.hDarkBrush);
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//
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// Draw right border in Light shade
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//
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DrawRect.left = tx2 - 1;
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DrawRect.right = tx2;
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DrawRect.top = ty1;
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DrawRect.bottom = ty2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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//
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// draw bottom in Light shade
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//
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DrawRect.left = tx1;
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DrawRect.right = tx2;
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DrawRect.top = ty2-1;
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DrawRect.bottom = ty2;
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FillRect(hDC,&DrawRect,WinperfInfo.hLightBrush);
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}
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}
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VOID
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DrawPerfText(
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HDC hDC,
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PDISPLAY_ITEM DisplayItem
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)
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/*++
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Routine Description:
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Draw text into the perf window
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Arguments:
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hDC - Device Context for window
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DisplayItem - Data structure with all perf window info
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Return Value:
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status of operation
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Revision History:
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|
|
03-21-91 Initial code
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--*/
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{
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RECT TextRect;
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UCHAR TextStr[50];
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ULONG j;
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UINT FontSize;
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//
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// Check that text display is enabled
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//
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if (DisplayItem->TextBorder.right == 0) {
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return;
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}
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TextRect.left = DisplayItem->TextBorder.left +1;
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TextRect.right = DisplayItem->TextBorder.right -1;
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TextRect.top = DisplayItem->TextBorder.top +1;
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TextRect.bottom = DisplayItem->TextBorder.bottom -1;
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FillRect(hDC,&TextRect,WinperfInfo.hBackground);
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SetBkColor(hDC,RGB(192,192,192));
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//
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// Decide which font to draw with
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//
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FontSize = TextRect.bottom - TextRect.top;
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if (FontSize >= 15) {
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WinperfInfo.hOldFont = SelectObject(hDC,WinperfInfo.LargeFont);
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} else if (FontSize > 10) {
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WinperfInfo.hOldFont = SelectObject(hDC,WinperfInfo.MediumFont);
|
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} else {
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WinperfInfo.hOldFont = SelectObject(hDC,WinperfInfo.SmallFont);
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}
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DrawText(
|
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hDC,
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DisplayItem->DispName,
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DisplayItem->DispNameLen,
|
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&TextRect,
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DT_LEFT | DT_VCENTER | DT_SINGLELINE
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);
|
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//
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// Build the numeric value
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//
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if (DisplayItem->Mega) {
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wsprintf(TextStr," %liK",DisplayItem->DataList[0][0]);
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} else {
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if (DisplayItem->IsPercent) {
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j = wsprintf(TextStr," %03li", DisplayItem->DataList[0][0]);
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TextStr[j+1] = 0;
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TextStr[j-0] = TextStr[j-1];
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TextStr[j-1] = TextStr[j-2];
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TextStr[j-2] = '.';
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} else {
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wsprintf(TextStr," %li",DisplayItem->DataList[0][0]);
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}
|
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}
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DrawText(
|
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hDC,
|
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TextStr,
|
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strlen(TextStr),
|
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&TextRect,
|
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DT_RIGHT | DT_VCENTER | DT_SINGLELINE
|
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);
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SelectObject(hDC,WinperfInfo.hOldFont);
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}
|
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VOID
|
|
DrawPerfGraph(
|
|
HDC hDC,
|
|
PDISPLAY_ITEM DisplayItem
|
|
)
|
|
/*++
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|
|
|
Routine Description:
|
|
|
|
Draw graphics into the perf window
|
|
|
|
Arguments:
|
|
|
|
hDC - Device Context for window
|
|
DisplayItem - Data structure with all perf window info
|
|
|
|
Return Value:
|
|
|
|
status of operation
|
|
|
|
|
|
Revision History:
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|
|
|
03-21-91 Initial code
|
|
|
|
--*/
|
|
|
|
{
|
|
RECT GraphRect,MemGraphRect;
|
|
ULONG Scale,i,j,GraphWidth,GraphHeight,Max;
|
|
PULONG pDL;
|
|
HPEN pen;
|
|
|
|
GraphRect.left = DisplayItem->GraphBorder.left + 1;
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|
GraphRect.right = DisplayItem->GraphBorder.right - 1;
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GraphRect.top = DisplayItem->GraphBorder.top + 1;
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|
GraphRect.bottom = DisplayItem->GraphBorder.bottom - 1;
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|
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|
GraphWidth = GraphRect.right - GraphRect.left -1;
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GraphHeight = GraphRect.bottom - GraphRect.top -1;
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|
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|
//
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|
// Memory bitmap is zero-offset for all windows, add 1 to make fillrect fill out
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|
// to right and bottom edge
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|
//
|
|
|
|
MemGraphRect.left = 0;
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|
MemGraphRect.right = GraphWidth +1;
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|
MemGraphRect.top = 0;
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|
MemGraphRect.bottom = GraphHeight +1;
|
|
|
|
FillRect(DisplayItem->MemoryDC,&MemGraphRect,WinperfInfo.hBackground);
|
|
|
|
MemGraphRect.right = GraphWidth;
|
|
MemGraphRect.bottom = GraphHeight;
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|
|
|
Max = *DisplayItem->MaxToUse;
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|
if (Max == 0) {
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|
Max = 1;
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|
}
|
|
|
|
//
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|
// calculate scale from data to perf window
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|
//
|
|
|
|
//
|
|
// X scale factor (100 items in x space). Scale can not be less than 1
|
|
//
|
|
|
|
Scale = (GraphWidth -1)/ DATA_LIST_LENGTH;
|
|
if (Scale == 0) {
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|
Scale = 1;
|
|
}
|
|
|
|
if (DisplayItem->DisplayMode == DISPLAY_MODE_BREAKDOWN ||
|
|
DisplayItem->DisplayMode == DISPLAY_MODE_PER_PROCESSOR) {
|
|
|
|
for (j=0; j < NumberOfProcessors; j++) {
|
|
pen = WinperfInfo.hPPen[j];
|
|
SelectObject(DisplayItem->MemoryDC,pen);
|
|
|
|
pDL = DisplayItem->DataList[j+1];
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|
MoveToEx(DisplayItem->MemoryDC,
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|
MemGraphRect.right,
|
|
MemGraphRect.bottom - (pDL[0] * GraphHeight) / Max,
|
|
(LPPOINT)NULL);
|
|
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|
for (i=1;((i<DATA_LIST_LENGTH) && i*Scale < GraphWidth);i++) {
|
|
LineTo(DisplayItem->MemoryDC,
|
|
MemGraphRect.right - Scale * i,
|
|
MemGraphRect.bottom - (pDL[i] * GraphHeight)/Max);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (DisplayItem->DisplayMode == DISPLAY_MODE_TOTAL ||
|
|
DisplayItem->DisplayMode == DISPLAY_MODE_BREAKDOWN) {
|
|
|
|
SelectObject(DisplayItem->MemoryDC,WinperfInfo.hBluePen);
|
|
pDL = DisplayItem->DataList[0];
|
|
|
|
MoveToEx(DisplayItem->MemoryDC,
|
|
MemGraphRect.right,
|
|
MemGraphRect.bottom - (pDL[0] * GraphHeight)/Max,
|
|
(LPPOINT)NULL);
|
|
|
|
|
|
|
|
for (i=1;((i<DATA_LIST_LENGTH) && i*Scale < GraphWidth);i++) {
|
|
LineTo(DisplayItem->MemoryDC,
|
|
MemGraphRect.right - Scale * i,
|
|
MemGraphRect.bottom - (pDL[i] * GraphHeight)/Max);
|
|
}
|
|
}
|
|
|
|
BitBlt(
|
|
hDC,
|
|
GraphRect.left,
|
|
GraphRect.top,
|
|
GraphWidth+1,
|
|
GraphHeight+1,
|
|
DisplayItem->MemoryDC,
|
|
0,
|
|
0,
|
|
SRCCOPY);
|
|
}
|
|
|
|
VOID
|
|
ShiftPerfGraph(
|
|
HDC hDC,
|
|
PDISPLAY_ITEM DisplayItem
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Shift memory bitmap 1 location left then draw the 1 new data point.
|
|
BitBlt this to the screen.
|
|
|
|
|
|
Arguments:
|
|
|
|
hDC - Device Context for window
|
|
DisplayItem - Data structure with all perf window info
|
|
|
|
Return Value:
|
|
|
|
status of operation
|
|
|
|
|
|
Revision History:
|
|
|
|
03-21-91 Initial code
|
|
|
|
--*/
|
|
|
|
{
|
|
RECT GraphRect,MemGraphRect,FillArea;
|
|
ULONG Scale,j,GraphWidth,GraphHeight,Max;
|
|
PULONG pDL;
|
|
HPEN pen;
|
|
|
|
|
|
GraphRect.left = DisplayItem->GraphBorder.left + 1;
|
|
GraphRect.right = DisplayItem->GraphBorder.right - 1;
|
|
GraphRect.top = DisplayItem->GraphBorder.top + 1;
|
|
GraphRect.bottom = DisplayItem->GraphBorder.bottom - 1;
|
|
|
|
GraphWidth = GraphRect.right - GraphRect.left -1;
|
|
GraphHeight = GraphRect.bottom - GraphRect.top -1;
|
|
|
|
//
|
|
// Memory bitmap is zero-offset for all windows, add 1 to make fillrect fill out
|
|
// to right and bottom edge
|
|
//
|
|
|
|
MemGraphRect.left = 0;
|
|
MemGraphRect.right = GraphWidth;
|
|
MemGraphRect.top = 0;
|
|
MemGraphRect.bottom = GraphHeight;
|
|
|
|
Max = *DisplayItem->MaxToUse;
|
|
if (Max == 0) {
|
|
Max = 1;
|
|
}
|
|
|
|
//
|
|
// calculate scale from data to perf window
|
|
//
|
|
// X scale factor (100 items in x space). Scale can not be less than 1
|
|
//
|
|
|
|
Scale = (GraphWidth -1)/ DATA_LIST_LENGTH;
|
|
if (Scale == 0) {
|
|
Scale = 1;
|
|
}
|
|
|
|
//
|
|
// Shift memory image left by scale
|
|
//
|
|
|
|
|
|
BitBlt( DisplayItem->MemoryDC,
|
|
0,
|
|
0,
|
|
GraphWidth+1 - Scale,
|
|
GraphHeight+1,
|
|
DisplayItem->MemoryDC,
|
|
Scale,
|
|
0,
|
|
SRCCOPY);
|
|
|
|
|
|
//
|
|
// Fill The new area on the right of the screen
|
|
//
|
|
|
|
FillArea.left = GraphWidth +1 - Scale;
|
|
FillArea.right = GraphWidth +1;
|
|
FillArea.top = 0;
|
|
FillArea.bottom = GraphHeight +1;
|
|
|
|
FillRect(DisplayItem->MemoryDC,&FillArea,WinperfInfo.hBackground);
|
|
|
|
|
|
|
|
if (DisplayItem->DisplayMode == DISPLAY_MODE_BREAKDOWN ||
|
|
DisplayItem->DisplayMode == DISPLAY_MODE_PER_PROCESSOR) {
|
|
|
|
for (j=0; j < NumberOfProcessors; j++) {
|
|
pen = WinperfInfo.hPPen[j];
|
|
SelectObject(DisplayItem->MemoryDC,pen);
|
|
|
|
pDL = DisplayItem->DataList[j+1];
|
|
MoveToEx(DisplayItem->MemoryDC,
|
|
MemGraphRect.right,
|
|
MemGraphRect.bottom - (pDL[0] * GraphHeight)/ Max,
|
|
(LPPOINT)NULL);
|
|
|
|
LineTo(DisplayItem->MemoryDC,
|
|
MemGraphRect.right - Scale,
|
|
MemGraphRect.bottom - (pDL[1] * GraphHeight)/ Max);
|
|
}
|
|
}
|
|
|
|
if (DisplayItem->DisplayMode == DISPLAY_MODE_TOTAL ||
|
|
DisplayItem->DisplayMode == DISPLAY_MODE_BREAKDOWN) {
|
|
|
|
SelectObject(DisplayItem->MemoryDC,WinperfInfo.hBluePen);
|
|
|
|
pDL = DisplayItem->DataList[0];
|
|
MoveToEx(DisplayItem->MemoryDC,
|
|
MemGraphRect.right,
|
|
MemGraphRect.bottom - (pDL[0] * GraphHeight)/Max,
|
|
(LPPOINT)NULL);
|
|
|
|
LineTo(DisplayItem->MemoryDC,
|
|
MemGraphRect.right - Scale,
|
|
MemGraphRect.bottom - (pDL[1] * GraphHeight)/Max);
|
|
}
|
|
|
|
BitBlt(
|
|
hDC,
|
|
GraphRect.left,
|
|
GraphRect.top,
|
|
GraphWidth+1,
|
|
GraphHeight+1,
|
|
DisplayItem->MemoryDC,
|
|
0,
|
|
0,
|
|
SRCCOPY);
|
|
|
|
}
|
|
|
|
|
|
|
|
BOOLEAN
|
|
CreateMemoryContext(
|
|
HDC hDC,
|
|
PDISPLAY_ITEM DisplayItem
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Create a memory context and a memory bitmap for each perf window
|
|
|
|
|
|
|
|
Arguments:
|
|
|
|
hDC - Device Context for window
|
|
DisplayItem - Data structure with all perf window info
|
|
|
|
Return Value:
|
|
|
|
status of operation
|
|
|
|
|
|
Revision History:
|
|
|
|
03-21-91 Initial code
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
int Width;
|
|
int Height;
|
|
|
|
if (DisplayItem->Display == TRUE) {
|
|
|
|
//
|
|
// Calculate width of memory bitmap needed
|
|
//
|
|
|
|
Width = DisplayItem->GraphBorder.right - DisplayItem->GraphBorder.left;
|
|
Height = DisplayItem->GraphBorder.bottom - DisplayItem->GraphBorder.top;
|
|
|
|
if ((Width<=0) || (Height <= 0)) {
|
|
|
|
//
|
|
// Disable this window that is to small to be seen
|
|
//
|
|
|
|
//DisplayItem->Display = FALSE;
|
|
|
|
//return(TRUE);
|
|
|
|
//
|
|
// make a fake width and height
|
|
//
|
|
|
|
Width = 1;
|
|
Height = 1;
|
|
}
|
|
|
|
//
|
|
// Create DC and Bitmap
|
|
//
|
|
|
|
DisplayItem->MemoryDC = CreateCompatibleDC(hDC);
|
|
|
|
if (DisplayItem->MemoryDC == NULL) {
|
|
return(FALSE);
|
|
}
|
|
|
|
|
|
DisplayItem->MemoryBitmap = CreateCompatibleBitmap(hDC,Width,Height);
|
|
|
|
if (DisplayItem->MemoryBitmap == 0) {
|
|
return(FALSE);
|
|
}
|
|
|
|
SelectObject(DisplayItem->MemoryDC,DisplayItem->MemoryBitmap);
|
|
|
|
}
|
|
|
|
return(TRUE);
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
DeleteMemoryContext(
|
|
PDISPLAY_ITEM DisplayItem
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Delete memory bitmap and context
|
|
|
|
Arguments:
|
|
|
|
hDC - Device Context for window
|
|
DisplayItem - Data structure with all perf window info
|
|
|
|
Return Value:
|
|
|
|
status of operation
|
|
|
|
|
|
Revision History:
|
|
|
|
03-21-91 Initial code
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
if (DisplayItem->MemoryDC != NULL) {
|
|
DeleteDC(DisplayItem->MemoryDC);
|
|
}
|
|
|
|
if (DisplayItem->MemoryBitmap != NULL) {
|
|
DeleteObject(DisplayItem->MemoryBitmap);
|
|
}
|
|
|
|
}
|
|
|