129 lines
3 KiB
C++
129 lines
3 KiB
C++
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// Copyright (C) Microsoft Corporation 1993-1997
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#include "header.h"
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#include "cpaldc.h"
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CPalDC::CPalDC(HBITMAP hbmpSel, HPALETTE hpalSel)
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{
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ClearMemory(this, sizeof(CPalDC));
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m_hdc = CreateCompatibleDC(NULL);
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ASSERT(m_hdc);
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if (hpalSel)
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SelectPal(hpalSel);
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m_hpal = hpalSel;
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m_hbmp = hbmpSel;
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if (m_hbmp) {
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// Can fail if hbmp is selected into another DC
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VERIFY((m_hbmpOld = (HBITMAP) SelectObject(m_hdc, m_hbmp)));
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}
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}
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CPalDC::CPalDC(int type)
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{
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ClearMemory(this, sizeof(CPalDC));
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switch (type) {
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case SCREEN_DC:
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m_hdc = CreateDC("DISPLAY", NULL, NULL, NULL);
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break;
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case SCREEN_IC:
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m_hdc = CreateIC("DISPLAY", NULL, NULL, NULL);
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break;
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default:
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ASSERT(type == SCREEN_DC);
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break;
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}
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ASSERT(m_hdc);
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}
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CPalDC::~CPalDC(void)
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{
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if (!m_hdc)
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return;
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if (m_hpalOld)
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SelectPalette(m_hdc, m_hpal, FALSE);
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if (m_hbmpOld)
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SelectObject(m_hdc, m_hbmpOld);
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DeleteDC(m_hdc);
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}
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void CPalDC::SelectPal(HPALETTE hpalSel)
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{
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if (hpalSel) {
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if (m_hpalOld) // m_hpalOld is set once, and only once
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SelectPalette(m_hdc, m_hpal, FALSE);
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else
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m_hpalOld = SelectPalette(m_hdc, m_hpal, FALSE);
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RealizePalette(m_hdc);
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}
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else if (m_hpalOld) {
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SelectPalette(m_hdc, m_hpalOld, FALSE);
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m_hpalOld = NULL;
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}
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}
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HPALETTE CPalDC::CreateBIPalette(HBITMAP hbmp)
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{
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PBITMAPINFO pbmi = (PBITMAPINFO) lcCalloc(sizeof(BITMAPINFOHEADER) +
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sizeof(RGBQUAD) * 256);
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PBITMAPINFOHEADER pbih = (PBITMAPINFOHEADER) pbmi;
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BITMAP bmp;
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GetObject(hbmp, sizeof(BITMAP), &bmp);
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pbih->biPlanes = bmp.bmPlanes;
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pbih->biBitCount = bmp.bmBitsPixel;
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pbih->biWidth = bmp.bmWidth;
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pbih->biHeight = bmp.bmHeight;
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pbih->biSize = sizeof(BITMAPINFOHEADER);
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pbih->biCompression = BI_RGB;
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if (!GetDIBits(m_hdc, hbmp, 0, 1, NULL, pbmi, DIB_RGB_COLORS))
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return NULL;
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HPALETTE hpal = ::CreateBIPalette(pbih);
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lcFree(pbmi);
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return hpal;
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}
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// REVIEW: only works with 256-color bitmaps
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#define PALVERSION 0x300
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HPALETTE CreateBIPalette(PBITMAPINFOHEADER pbihd)
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{
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// Allocate for the logical palette structure
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LOGPALETTE* pPal = (LOGPALETTE*) lcMalloc(sizeof(LOGPALETTE) +
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256 * sizeof(PALETTEENTRY));
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pPal->palNumEntries = 256;
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pPal->palVersion = PALVERSION;
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/*
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* Fill in the palette entries from the DIB color table and
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* create a logical color palette.
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*/
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RGBQUAD* pRgb = (RGBQUAD*)(((PBYTE) pbihd) + pbihd->biSize);
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for (int i = 0; i < (int) 256; i++){
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pPal->palPalEntry[i].peRed = pRgb[i].rgbRed;
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pPal->palPalEntry[i].peGreen = pRgb[i].rgbGreen;
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pPal->palPalEntry[i].peBlue = pRgb[i].rgbBlue;
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pPal->palPalEntry[i].peFlags = (BYTE) 0;
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}
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HPALETTE hpal = CreatePalette(pPal);
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lcFree(pPal);
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return hpal;
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}
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