tableinitcmtemplate.cpp
资源名称:vnc3326s.zip [点击查看]
上传用户:sbftbdw
上传日期:2007-01-03
资源大小:379k
文件大小:3k
源码类别:
远程控制编程
开发平台:
Visual C++
- /*
- * tableinitcmtemplate.c - template for initialising lookup tables for
- * translation from a colour map to true colour.
- *
- * This file shouldn't be compiled. It is included multiple times by
- * translate.c, each time with a different definition of the macro OUT.
- * For each value of OUT, this file defines a function which allocates an
- * appropriately sized lookup table and initialises it.
- *
- * I know this code isn't nice to read because of all the macros, but
- * efficiency is important here.
- */
- #if !defined(OUT)
- #error "This file shouldn't be compiled."
- #error "It is included as part of translate.c"
- #endif
- #define OUT_T CONCAT2E(CARD,OUT)
- #define SwapOUT(x) CONCAT2E(Swap,OUT) (x)
- #define rfbInitColourMapSingleTableOUT
- CONCAT2E(rfbInitColourMapSingleTable,OUT)
- // THIS CODE HAS BEEN MODIFIED FROM THE ORIGINAL UNIX SOURCE
- // TO WORK FOR WINVNC. THE PALETTE SHOULD REALLY BE RETRIEVED
- // FROM THE VNCDESKTOP OBJECT, RATHER THAN FROM THE OS DIRECTLY
- static void
- rfbInitColourMapSingleTableOUT (char **table,
- rfbPixelFormat *in,
- rfbPixelFormat *out)
- {
- log.Print(LL_ALL, VNCLOG("rfbInitColourMapSingleTable calledn"));
- // ALLOCATE SPACE FOR COLOUR TABLE
- int nEntries = 1 << in->bitsPerPixel;
- // Allocate the table
- if (*table) free(*table);
- *table = (char *)malloc(nEntries * sizeof(OUT_T));
- if (*table == NULL)
- {
- log.Print(LL_INTERR, VNCLOG("failed to allocate translation tablen"));
- return;
- }
- // Obtain the system palette
- HDC hDC = GetDC(NULL);
- PALETTEENTRY palette[256];
- if (GetSystemPaletteEntries(hDC,
- 0, 256, palette) == 0)
- {
- log.Print(LL_INTERR, VNCLOG("failed to get system palette (%d)n"), GetLastError());
- ReleaseDC(NULL, hDC);
- return;
- }
- ReleaseDC(NULL, hDC);
- // COLOUR TRANSLATION
- // We now have the colour table intact. Map it into a translation table
- int i, r, g, b;
- OUT_T *t = (OUT_T *)*table;
- for (i = 0; i < nEntries; i++)
- {
- // Split down the RGB data
- r = palette[i].peRed;
- g = palette[i].peGreen;
- b = palette[i].peBlue;
- // Now translate it
- t[i] = ((((r * out->redMax + 127) / 255) << out->redShift) |
- (((g * out->greenMax + 127) / 255) << out->greenShift) |
- (((b * out->blueMax + 127) / 255) << out->blueShift));
- #if (OUT != 8)
- if (out->bigEndian != in->bigEndian)
- {
- t[i] = SwapOUT(t[i]);
- }
- #endif
- }
- log.Print(LL_ALL, VNCLOG("rfbInitColourMapSingleTable donen"));
- }
- #undef OUT_T
- #undef SwapOUT
- #undef rfbInitColourMapSingleTableOUT