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106 lines
4.6 KiB
C
106 lines
4.6 KiB
C
/*
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* PROJECT: ReactOS Framebuffer Display Driver
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* LICENSE: Microsoft NT4 DDK Sample Code License
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* FILE: win32ss/drivers/displays/vga_new/driver.h
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* PURPOSE: Main Driver Header File
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* PROGRAMMERS: Copyright (c) 1992-1995 Microsoft Corporation
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* ReactOS Portable Systems Group
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*/
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//#define DBG 1
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#include "stddef.h"
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#include <stdarg.h>
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#include "windef.h"
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#include "wingdi.h"
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#include "winddi.h"
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#include "devioctl.h"
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#include "ntddvdeo.h"
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#include "debug.h"
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typedef struct _PDEV
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{
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HANDLE hDriver; // Handle to \Device\Screen
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HDEV hdevEng; // Engine's handle to PDEV
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HSURF hsurfEng; // Engine's handle to surface
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HPALETTE hpalDefault; // Handle to the default palette for device.
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PBYTE pjScreen; // This is pointer to base screen address
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ULONG cxScreen; // Visible screen width
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ULONG cyScreen; // Visible screen height
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ULONG ulMode; // Mode the mini-port driver is in.
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LONG lDeltaScreen; // Distance from one scan to the next.
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ULONG cScreenSize; // size of video memory, including
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// offscreen memory.
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PVOID pOffscreenList; // linked list of DCI offscreen surfaces.
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FLONG flRed; // For bitfields device, Red Mask
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FLONG flGreen; // For bitfields device, Green Mask
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FLONG flBlue; // For bitfields device, Blue Mask
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ULONG cPaletteShift; // number of bits the 8-8-8 palette must
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// be shifted by to fit in the hardware
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// palette.
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ULONG ulBitCount; // # of bits per pel 8,16,24,32 are only supported.
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POINTL ptlHotSpot; // adjustment for pointer hot spot
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VIDEO_POINTER_CAPABILITIES PointerCapabilities; // HW pointer abilities
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PVIDEO_POINTER_ATTRIBUTES pPointerAttributes; // hardware pointer attributes
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DWORD cjPointerAttributes; // Size of buffer allocated
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BOOL fHwCursorActive; // Are we currently using the hw cursor
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PALETTEENTRY *pPal; // If this is pal managed, this is the pal
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BOOL bSupportDCI; // Does the miniport support DCI?
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// eVb: 3.1 [DDK Change] - Support new VGA Miniport behavior w.r.t updated framebuffer remapping
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LONG flHooks;
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// eVb: 3.1 [END]
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// eVb: 3.1 [VGARISC Change] - Add new fields for VGA support
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SURFOBJ* pso;
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UCHAR* pjBase;
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// eVb: 3.1 [END]
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} PDEV, *PPDEV;
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DWORD getAvailableModes(HANDLE, PVIDEO_MODE_INFORMATION *, DWORD *);
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BOOL bInitPDEV(PPDEV, PDEVMODEW, GDIINFO *, DEVINFO *);
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BOOL bInitSURF(PPDEV, BOOL);
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BOOL bInitPaletteInfo(PPDEV, DEVINFO *);
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BOOL bInitPointer(PPDEV, DEVINFO *);
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BOOL bInit256ColorPalette(PPDEV);
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VOID vDisablePalette(PPDEV);
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VOID vDisableSURF(PPDEV);
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#define MAX_CLUT_SIZE (sizeof(VIDEO_CLUT) + (sizeof(ULONG) * 256))
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//
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// Determines the size of the DriverExtra information in the DEVMODE
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// structure passed to and from the display driver.
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//
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#define DRIVER_EXTRA_SIZE 0
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// eVb: 3.2 [VGARISC Change] - Transform into VGA driver
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#define DLL_NAME L"vga" // Name of the DLL in UNICODE
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#define STANDARD_DEBUG_PREFIX "Vga risc: " // All debug output is prefixed
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#define ALLOC_TAG 'rgvD' // Four byte tag (characters in
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// reverse order) used for memory
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// allocations
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// eVb: 3.2 [END]
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// eVb: 3.3 [VGARISC Change] - Add new macros for VGA usage
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//
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// Each pixel in 4BPP being a nibble, the color data for that pixel is thus
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// located at the xth bit within the nibble, where x is the plane number [0-3].
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// Each nibble being 4 bytes, the color data is thus at the (nibble * 4 + x).
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// That color data is then taken from its linear position and shifted to the
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// correct position within the 16-bit planar buffer word.
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//
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#define VAL(data, px, pl, pos) ((data) >> (((px) * 4) + (pl)) & 1) << (pos)
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//
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// This figures out which pixel in the planar word data corresponds to which pixel
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// in the 4BPP linear data.
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//
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#define SET_PLANE_DATA(x, y, a, b) \
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(x) |= VAL(y, (((-1 + ((((b) % 8) % 2) << 1) - (((b) % 8) + 1) + 8))), a, b)
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/* Alignment Macros */
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#define ALIGN_DOWN_BY(size, align) \
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((ULONG_PTR)(size) & ~((ULONG_PTR)(align) - 1))
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#define ALIGN_UP_BY(size, align) \
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(ALIGN_DOWN_BY(((ULONG_PTR)(size) + align - 1), align))
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// eVb: 3.3 [END]
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