167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*
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SST_WMEnum_Xlib.c
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Author: Patrick Baggett <ptbaggett@762studios.com>
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Created: 1/8/2013
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Purpose:
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Enumerates graphics adapters and screens.
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License:
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This program is free software. It comes without any warranty, to
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the extent permitted by applicable law. You can redistribute it
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and/or modify it under the terms of the Do What The Fuck You Want
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To Public License, Version 2, as published by Sam Hocevar. See
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http://sam.zoy.org/wtfpl/COPYING for more details.
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*/
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#include <SST/SST_WM.h>
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#include "XlibPrivate.h"
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#include "APIPrivate.h"
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#include <string.h> /* strlen() etc. */
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#include <stdlib.h>
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/******************************************************************************/
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static SST_GraphicsEnumerator Xlib_CreateGraphicsEnumerator(void)
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{
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Display* display;
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SST_GraphicsEnumerator_Xlib* enumerator;
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enumerator = (SST_GraphicsEnumerator_Xlib*)malloc(sizeof(SST_GraphicsEnumerator_Xlib));
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if(enumerator == NULL)
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return NULL;
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/* Open the display */
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display = X.OpenDisplay(NULL);
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if(display == NULL)
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{
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free(enumerator);
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return NULL;
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}
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/* Save and return */
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enumerator->bpp = (uint32_t)DefaultDepth(display, DefaultScreen(display));
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enumerator->width = (uint32_t)DisplayWidth(display, DefaultScreen(display));
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enumerator->height = (uint32_t)DisplayHeight(display, DefaultScreen(display));
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/* Done with display */
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X.CloseDisplay(display);
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return enumerator;
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}
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/******************************************************************************/
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static size_t Xlib_GetEnumAdapterCount(SST_GraphicsEnumerator enumerator)
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{
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(void)enumerator;
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/* Only support 1 adapter */
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return 1;
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}
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/******************************************************************************/
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static void Xlib_GetEnumAdapterName(SST_GraphicsEnumerator enumerator, size_t adapterId, char* nameReturn, size_t* bufferSize)
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{
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size_t len;
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const char* name = "X Display Device";
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(void)enumerator;
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(void)adapterId;
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len = strlen(name);
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/* Query name length */
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if(nameReturn == NULL)
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{
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*bufferSize = len+1;
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}
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else
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{
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size_t copyAmount;
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/* Nothing to do? */
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if(*bufferSize == 0)
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return;
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/* Use min(len, (*bufferSize)-1) */
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copyAmount = len;
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if(copyAmount > (*bufferSize)-1)
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copyAmount = (*bufferSize)-1;
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memcpy(nameReturn, name, copyAmount);
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nameReturn[copyAmount] = '\0';
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}
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}
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/******************************************************************************/
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static size_t Xlib_GetEnumScreenCount(SST_GraphicsEnumerator enumerator, size_t adapterId)
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{
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(void)enumerator;
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(void)adapterId;
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return 1;
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}
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/******************************************************************************/
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static void Xlib_GetEnumVideoModes(SST_GraphicsEnumerator enumerator, size_t adapterId, size_t screenId, SST_VideoMode* modesReturn, size_t* modeCountReturn)
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{
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SST_GraphicsEnumerator_Xlib* enumXlib = (SST_GraphicsEnumerator_Xlib*)enumerator;
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/* Only one adapter/screen supported */
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if(adapterId != 0 || screenId != 0)
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return;
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if(modesReturn == NULL)
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*modeCountReturn = 1;
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else
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{
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modesReturn[0].bpp = enumXlib->bpp;
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modesReturn[0].width = enumXlib->width;
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modesReturn[0].height = enumXlib->height;
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modesReturn[0].refreshRate = 0;
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}
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}
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/******************************************************************************/
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void Xlib_GetEnumCurrentVideoMode(SST_GraphicsEnumerator enumerator, size_t adapterId, size_t screenId, SST_VideoMode* mode)
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{
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SST_GraphicsEnumerator_Xlib* enumXlib = (SST_GraphicsEnumerator_Xlib*)enumerator;
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if(adapterId != 0 || screenId != 0)
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return;
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mode->bpp = enumXlib->bpp;
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mode->width = enumXlib->width;
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mode->height = enumXlib->height;
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mode->refreshRate = 0;
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}
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/******************************************************************************/
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static void Xlib_DestroyGraphicsEnumerator(SST_GraphicsEnumerator enumerator)
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{
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free(enumerator);
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}
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/******************************************************************************/
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struct SST_WM_EnumFuncs Xlib_EnumFuncs = {
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Xlib_CreateGraphicsEnumerator,
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Xlib_GetEnumAdapterCount,
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Xlib_GetEnumAdapterName,
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Xlib_GetEnumScreenCount,
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Xlib_GetEnumVideoModes,
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Xlib_GetEnumCurrentVideoMode,
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Xlib_DestroyGraphicsEnumerator
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};
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