Initial commit

libsst-wm/Xlib/SST_WMEnum_Xlib.c

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