318 lines
8.6 KiB
C
318 lines
8.6 KiB
C
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/******************************Module*Header*******************************\
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* Module Name: palette.c
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*
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* Palette support.
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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\**************************************************************************/
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#include "precomp.h"
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// Global Table defining the 20 Window default colours. For 256 colour
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// palettes the first 10 must be put at the beginning of the palette
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// and the last 10 at the end of the palette.
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PALETTEENTRY gapalBase[20] =
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{
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{ 0, 0, 0, 0 }, // 0
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{ 0x80,0, 0, 0 }, // 1
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{ 0, 0x80,0, 0 }, // 2
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{ 0x80,0x80,0, 0 }, // 3
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{ 0, 0, 0x80,0 }, // 4
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{ 0x80,0, 0x80,0 }, // 5
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{ 0, 0x80,0x80,0 }, // 6
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{ 0xC0,0xC0,0xC0,0 }, // 7
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{ 192, 220, 192, 0 }, // 8
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{ 166, 202, 240, 0 }, // 9
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{ 255, 251, 240, 0 }, // 10
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{ 160, 160, 164, 0 }, // 11
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{ 0x80,0x80,0x80,0 }, // 12
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{ 0xFF,0, 0 ,0 }, // 13
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{ 0, 0xFF,0 ,0 }, // 14
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{ 0xFF,0xFF,0 ,0 }, // 15
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{ 0 ,0, 0xFF,0 }, // 16
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{ 0xFF,0, 0xFF,0 }, // 17
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{ 0, 0xFF,0xFF,0 }, // 18
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{ 0xFF,0xFF,0xFF,0 }, // 19
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};
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/******************************Public*Routine******************************\
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* BOOL bInitializePalette
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*
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* Initializes default palette for PDEV.
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*
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\**************************************************************************/
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BOOL bInitializePalette(
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PDEV* ppdev,
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DEVINFO* pdi)
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{
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PALETTEENTRY* ppal;
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PALETTEENTRY* ppalTmp;
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ULONG ulLoop;
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BYTE jRed;
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BYTE jGre;
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BYTE jBlu;
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HPALETTE hpal;
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if (ppdev->iBitmapFormat == BMF_8BPP)
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{
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// Allocate our palette:
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ppal = (PALETTEENTRY*)EngAllocMem(FL_ZERO_MEMORY,
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(sizeof(PALETTEENTRY) * 256), ALLOC_TAG);
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if (ppal == NULL)
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goto ReturnFalse;
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ppdev->pPal = ppal;
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// Generate 256 (8*4*4) RGB combinations to fill the palette
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jRed = 0;
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jGre = 0;
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jBlu = 0;
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ppalTmp = ppal;
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for (ulLoop = 256; ulLoop != 0; ulLoop--)
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{
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ppalTmp->peRed = jRed;
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ppalTmp->peGreen = jGre;
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ppalTmp->peBlue = jBlu;
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ppalTmp->peFlags = 0;
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ppalTmp++;
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if (!(jRed += 32))
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if (!(jGre += 32))
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jBlu += 64;
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}
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// Fill in Windows reserved colours from the WIN 3.0 DDK
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// The Window Manager reserved the first and last 10 colours for
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// painting windows borders and for non-palette managed applications.
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for (ulLoop = 0; ulLoop < 10; ulLoop++)
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{
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// First 10
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ppal[ulLoop] = gapalBase[ulLoop];
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// Last 10
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ppal[246 + ulLoop] = gapalBase[ulLoop+10];
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}
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// Create handle for palette.
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hpal = EngCreatePalette(PAL_INDEXED, 256, (ULONG*) ppal, 0, 0, 0);
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}
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else
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{
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ASSERTDD((ppdev->iBitmapFormat == BMF_16BPP) ||
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(ppdev->iBitmapFormat == BMF_32BPP),
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"This case handles only 16 or 32bpp");
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hpal = EngCreatePalette(PAL_BITFIELDS, 0, NULL,
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ppdev->flRed, ppdev->flGreen, ppdev->flBlue);
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}
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ppdev->hpalDefault = hpal;
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pdi->hpalDefault = hpal;
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if (hpal == 0)
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goto ReturnFalse;
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return(TRUE);
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ReturnFalse:
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DISPDBG((0, "Failed bInitializePalette"));
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return(FALSE);
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}
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/******************************Public*Routine******************************\
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* VOID vUninitializePalette
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*
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* Frees resources allocated by bInitializePalette.
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*
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* Note: In an error case, this may be called before bInitializePalette.
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*
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\**************************************************************************/
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VOID vUninitializePalette(PDEV* ppdev)
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{
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// Delete the default palette if we created one:
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if (ppdev->hpalDefault != 0)
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EngDeletePalette(ppdev->hpalDefault);
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if (ppdev->pPal != (PALETTEENTRY*) NULL)
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EngFreeMem(ppdev->pPal);
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}
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/******************************Public*Routine******************************\
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* BOOL bEnablePalette
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*
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* Initialize the hardware's 8bpp palette registers.
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*
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\**************************************************************************/
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BOOL bEnablePalette(PDEV* ppdev)
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{
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BYTE ajClutSpace[MAX_CLUT_SIZE];
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PVIDEO_CLUT pScreenClut;
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ULONG ulReturnedDataLength;
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ULONG cColors;
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PVIDEO_CLUTDATA pScreenClutData;
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if (ppdev->iBitmapFormat == BMF_8BPP)
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{
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// Fill in pScreenClut header info:
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pScreenClut = (PVIDEO_CLUT) ajClutSpace;
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pScreenClut->NumEntries = 256;
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pScreenClut->FirstEntry = 0;
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// Copy colours in:
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cColors = 256;
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pScreenClutData = (PVIDEO_CLUTDATA) (&(pScreenClut->LookupTable[0]));
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while(cColors--)
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{
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pScreenClutData[cColors].Red = ppdev->pPal[cColors].peRed >>
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ppdev->cPaletteShift;
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pScreenClutData[cColors].Green = ppdev->pPal[cColors].peGreen >>
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ppdev->cPaletteShift;
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pScreenClutData[cColors].Blue = ppdev->pPal[cColors].peBlue >>
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ppdev->cPaletteShift;
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pScreenClutData[cColors].Unused = 0;
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}
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// Set palette registers:
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if (EngDeviceIoControl(ppdev->hDriver,
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IOCTL_VIDEO_SET_COLOR_REGISTERS,
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pScreenClut,
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MAX_CLUT_SIZE,
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NULL,
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0,
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&ulReturnedDataLength))
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{
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DISPDBG((0, "Failed bEnablePalette"));
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return(FALSE);
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}
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}
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DISPDBG((5, "Passed bEnablePalette"));
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return(TRUE);
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}
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/******************************Public*Routine******************************\
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* VOID vDisablePalette
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*
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* Undoes anything done in bEnablePalette.
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*
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\**************************************************************************/
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VOID vDisablePalette(
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PDEV* ppdev)
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{
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// Nothin' to do
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}
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/******************************Public*Routine******************************\
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* VOID vAssertModePalette
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*
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* Sets/resets the palette in preparation for full-screen/graphics mode.
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*
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\**************************************************************************/
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VOID vAssertModePalette(
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PDEV* ppdev,
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BOOL bEnable)
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{
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// USER immediately calls DrvSetPalette after switching out of
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// full-screen, so we don't have to worry about resetting the
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// palette here.
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}
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/******************************Public*Routine******************************\
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* BOOL DrvSetPalette
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*
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* DDI entry point for manipulating the palette.
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*
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\**************************************************************************/
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BOOL DrvSetPalette(
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DHPDEV dhpdev,
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PALOBJ* ppalo,
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FLONG fl,
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ULONG iStart,
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ULONG cColors)
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{
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BYTE ajClutSpace[MAX_CLUT_SIZE];
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PVIDEO_CLUT pScreenClut;
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PVIDEO_CLUTDATA pScreenClutData;
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PDEV* ppdev;
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UNREFERENCED_PARAMETER(fl);
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ppdev = (PDEV*) dhpdev;
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// Fill in pScreenClut header info:
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pScreenClut = (PVIDEO_CLUT) ajClutSpace;
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pScreenClut->NumEntries = (USHORT) cColors;
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pScreenClut->FirstEntry = (USHORT) iStart;
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pScreenClutData = (PVIDEO_CLUTDATA) (&(pScreenClut->LookupTable[0]));
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if (cColors != PALOBJ_cGetColors(ppalo, iStart, cColors,
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(ULONG*) pScreenClutData))
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{
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DISPDBG((0, "DrvSetPalette failed PALOBJ_cGetColors\n"));
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return (FALSE);
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}
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// Set the high reserved byte in each palette entry to 0.
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// Do the appropriate palette shifting to fit in the DAC.
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if (ppdev->cPaletteShift)
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{
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while(cColors--)
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{
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pScreenClutData[cColors].Red >>= ppdev->cPaletteShift;
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pScreenClutData[cColors].Green >>= ppdev->cPaletteShift;
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pScreenClutData[cColors].Blue >>= ppdev->cPaletteShift;
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pScreenClutData[cColors].Unused = 0;
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}
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}
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else
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{
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while(cColors--)
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{
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pScreenClutData[cColors].Unused = 0;
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}
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}
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// Set palette registers
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if (EngDeviceIoControl(ppdev->hDriver,
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IOCTL_VIDEO_SET_COLOR_REGISTERS,
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pScreenClut,
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MAX_CLUT_SIZE,
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NULL,
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0,
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&cColors))
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{
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DISPDBG((0, "DrvSetPalette failed EngDeviceIoControl\n"));
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return (FALSE);
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}
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return(TRUE);
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}
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