Jérôme Duval
de050c6029
fixed warnings and code style. Please, from now on, provide *patches* to this version. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21421 a95241bf-73f2-0310-859d-f6bbb57e9c96
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
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Copyright 1999, Be Incorporated. All Rights Reserved.
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This file may be used under the terms of the Be Sample Code License.
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Other authors:
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Gerald Zajac 2006-2007
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*/
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#include "GlobalData.h"
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#include "AccelerantPrototypes.h"
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/*
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Return the current display mode. The only time you might return an
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error is if a mode hasn't been set.
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*/
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status_t
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GET_DISPLAY_MODE (display_mode *current_mode)
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{
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/* easy for us, we return the last mode we set */
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*current_mode = si->dm;
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return B_OK;
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}
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/*
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Return the frame buffer configuration information.
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*/
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status_t
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GET_FRAME_BUFFER_CONFIG(frame_buffer_config *pFBC)
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{
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// TRACE(("GET_FRAME_BUFFER_CONFIG called\n"));
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*pFBC = si->fbc;
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return B_OK;
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}
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/*
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Return the maximum and minium pixel clock limits for the specified mode.
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*/
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status_t
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GET_PIXEL_CLOCK_LIMITS(display_mode *dm, uint32 *low, uint32 *high)
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{
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/*
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Note that we're not making any guarantees about the ability of the attached
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display to handle pixel clocks within the limits we return. A future monitor
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capablilities database will post-process this information.
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*/
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uint32 total_pix = (uint32)dm->timing.h_total * (uint32)dm->timing.v_total;
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uint32 clock_limit;
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/* max pixel clock is pixel depth dependant */
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switch (dm->space & ~0x3000) {
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case B_RGB32:
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clock_limit = si->pix_clk_max32;
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break;
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case B_RGB15:
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case B_RGB16:
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clock_limit = si->pix_clk_max16;
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break;
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case B_CMAP8:
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clock_limit = si->pix_clk_max8;
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break;
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default:
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clock_limit = 0;
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}
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/* lower limit of about 48Hz vertical refresh */
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*low = (total_pix * 48L) / 1000L;
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if (*low > clock_limit)
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return B_ERROR;
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*high = clock_limit;
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return B_OK;
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}
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/*
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Return the semaphore id that will be used to signal a vertical retrace
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occured.
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*/
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sem_id
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ACCELERANT_RETRACE_SEMAPHORE(void)
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{
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// TRACE(("ACCELERANT_RETRACE_SEMAPHORE() called\n"));
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// if (si->bInterruptAssigned && si->vblank >= 0)
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// return si->vblank;
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// else
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return B_ERROR;
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}
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