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172 lines
4.3 KiB
172 lines
4.3 KiB
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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modeset.c
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Abstract:
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This is the modeset code for the headless miniport driver.
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Environment:
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kernel mode only
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Notes:
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--*/
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#include "dderror.h"
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#include "devioctl.h"
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#include "miniport.h"
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#include "ntddvdeo.h"
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#include "video.h"
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#include "headless.h"
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#if defined(ALLOC_PRAGMA)
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#pragma alloc_text(PAGE,HeadlessQueryAvailableModes)
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#pragma alloc_text(PAGE,HeadlessQueryNumberOfAvailableModes)
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#endif
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VP_STATUS
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HeadlessQueryAvailableModes(
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PVIDEO_MODE_INFORMATION ModeInformation,
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ULONG ModeInformationSize,
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PULONG OutputSize
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)
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/*++
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Routine Description:
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This routine returns the list of all available available modes on the
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card.
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Arguments:
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ModeInformation - Pointer to the output buffer supplied by the user.
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This is where the list of all valid modes is stored.
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ModeInformationSize - Length of the output buffer supplied by the user.
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OutputSize - Pointer to a buffer in which to return the actual size of
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the data in the buffer. If the buffer was not large enough, this
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contains the minimum required buffer size.
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Return Value:
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ERROR_INSUFFICIENT_BUFFER if the output buffer was not large enough
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for the data being returned.
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NO_ERROR if the operation completed successfully.
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--*/
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{
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PVIDEO_MODE_INFORMATION videoModes = ModeInformation;
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ULONG i;
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//
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// Find out the size of the data to be put in the buffer and return
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// that in the status information (whether or not the information is
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// there). If the buffer passed in is not large enough return an
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// appropriate error code.
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//
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if (ModeInformationSize < (*OutputSize =
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NumVideoModes * sizeof(VIDEO_MODE_INFORMATION)) ) {
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return ERROR_INSUFFICIENT_BUFFER;
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}
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//
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// For each mode supported by the card, store the mode characteristics
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// in the output buffer.
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//
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for (i = 0; i < NumVideoModes; i++, videoModes++) {
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videoModes->Length = sizeof(VIDEO_MODE_INFORMATION);
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videoModes->ModeIndex = i;
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videoModes->VisScreenWidth = ModesHeadless[i].hres;
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videoModes->VisScreenHeight = ModesHeadless[i].vres;
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videoModes->NumberOfPlanes = 1;
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videoModes->BitsPerPlane = 4;
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videoModes->Frequency = 60;
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videoModes->XMillimeter = 320; // temporary hardcoded constant
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videoModes->YMillimeter = 240; // temporary hardcoded constant
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videoModes->NumberRedBits = 6;
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videoModes->NumberGreenBits = 6;
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videoModes->NumberBlueBits = 6;
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videoModes->RedMask = 0;
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videoModes->GreenMask = 0;
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videoModes->BlueMask = 0;
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videoModes->AttributeFlags = VIDEO_MODE_COLOR | VIDEO_MODE_GRAPHICS |
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VIDEO_MODE_PALETTE_DRIVEN | VIDEO_MODE_MANAGED_PALETTE;
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}
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return NO_ERROR;
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}
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VP_STATUS
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HeadlessQueryNumberOfAvailableModes(
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PVIDEO_NUM_MODES NumModes,
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ULONG NumModesSize,
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PULONG OutputSize
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)
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/*++
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Routine Description:
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This routine returns the number of available modes for this particular
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video card.
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Arguments:
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NumModes - Pointer to the output buffer supplied by the user. This is
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where the number of modes is stored.
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NumModesSize - Length of the output buffer supplied by the user.
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OutputSize - Pointer to a buffer in which to return the actual size of
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the data in the buffer.
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Return Value:
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ERROR_INSUFFICIENT_BUFFER if the output buffer was not large enough
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for the data being returned.
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NO_ERROR if the operation completed successfully.
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--*/
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{
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//
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// Find out the size of the data to be put in the the buffer and return
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// that in the status information (whether or not the information is
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// there). If the buffer passed in is not large enough return an
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// appropriate error code.
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//
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if (NumModesSize < (*OutputSize = sizeof(VIDEO_NUM_MODES)) ) {
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return ERROR_INSUFFICIENT_BUFFER;
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}
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//
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// Store the number of modes into the buffer.
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//
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NumModes->NumModes = NumVideoModes;
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NumModes->ModeInformationLength = sizeof(VIDEO_MODE_INFORMATION);
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return NO_ERROR;
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}
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