Initial commit

libsst-wm/RaspPi/SST_WMEnum_RaspPi.c

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+/*
+	SST_WMEnum_RaspPi.c
+	Author: Patrick Baggett <ptbaggett@762studios.com>
+	Created: 5/31/2013
+
+	Purpose: 
+
+	Raspberry Pi native (no display server) port for Linux
+	
+	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 <bcm_host.h>	/* R-Pi header */
+
+#include <string.h> /* strlen() etc. */
+#include <stdlib.h> 
+
+/******************************************************************************/
+
+SST_GraphicsEnumerator SST_WM_CreateGraphicsEnumerator(void)
+{
+	/* Call this just in case. Multiple calls do not affect anything */
+	bcm_host_init();
+
+	return (void*)(uintptr_t)(0x40000000);	/* No, it is meaningless */
+}
+
+/******************************************************************************/
+
+size_t SST_WM_GetEnumAdapterCount(SST_GraphicsEnumerator enumerator)
+{
+	(void)enumerator;
+
+	/* R-Pi only has the one on-chip device */
+	return 1;
+}
+
+/******************************************************************************/
+
+void SST_WM_GetEnumAdapterName(SST_GraphicsEnumerator enumerator, size_t adapterId, char* nameReturn, size_t* bufferSize)
+{
+	size_t len;
+	const char* name = "VideoCore IV (R) GPU"; 
+
+	(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';
+	}
+
+}
+
+/******************************************************************************/
+
+size_t SST_WM_GetEnumScreenCount(SST_GraphicsEnumerator enumerator, size_t adapterId)
+{
+	(void)enumerator;
+	(void)adapterId;
+	return 1;
+}
+
+/******************************************************************************/
+
+void SST_WM_GetEnumVideoModes(SST_GraphicsEnumerator enumerator, size_t adapterId, size_t screenId, SST_VideoMode* modesReturn, size_t* modeCountReturn)
+{
+	(void)enumerator;
+
+	/* Only one adapter/screen supported */
+	if(adapterId != 0 || screenId != 0)
+		return;
+	
+	if(modesReturn == NULL)
+		*modeCountReturn = 1;
+	else
+	{
+		/* TODO: there might be a way to do this, but it
+		is very manual. Just return current resolution. */
+		uint32_t w, h;
+
+		graphics_get_display_size(0, &w, &h);
+	
+		modesReturn[0].bpp = 16; /* TODO: not always 16 */
+		modesReturn[0].width = w;
+		modesReturn[0].height = h;
+		modesReturn[0].refreshRate = 0;
+	}
+
+}
+
+/******************************************************************************/
+
+void SST_WM_GetEnumCurrentVideoMode(SST_GraphicsEnumerator enumerator, size_t adapterId, size_t screenId, SST_VideoMode* mode)
+{
+	uint32_t w, h;
+	(void)enumerator;
+
+	if(adapterId != 0 || screenId != 0)
+		return;
+
+	/* TODO: does this reflect changes made with fbset? */
+	graphics_get_display_size(0, &w, &h);
+
+	mode->bpp = 16;
+	mode->width = w;
+	mode->height = h;
+	mode->refreshRate = 0;
+}
+
+/******************************************************************************/
+
+void SST_WM_DestroyGraphicsEnumerator(SST_GraphicsEnumerator enumerator)
+{
+	(void)enumerator;
+}