boards/base/RaspberryPi/board_framebuffer.h


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/*
 * This file is subject to the terms of the GFX License. If a copy of
 * the license was not distributed with this file, you can obtain one at:
 *
 *              http://ugfx.org/license.html
 */


// Set this to your frame buffer pixel format and size. You can also override these in your makefile.
#ifndef GDISP_LLD_PIXELFORMAT
	#define GDISP_LLD_PIXELFORMAT		GDISP_PIXELFORMAT_RGB565
#endif
#ifndef GDISP_SCREEN_WIDTH
	#define GDISP_SCREEN_WIDTH			800
#endif
#ifndef GDISP_SCREEN_HEIGHT
	#define GDISP_SCREEN_HEIGHT			600
#endif

#ifdef GDISP_DRIVER_VMT

	#if GDISP_SCREEN_WIDTH > 4096 || GDISP_SCREEN_HEIGHT > 4096
		#error "Raspberry Pi Framebuffer: Screen size is defined too large. Max is 4096x4096"
	#endif

	#include "rpi_mailbox.h"

	typedef struct FrameBufferDescription {
		uint32_t	width;
		uint32_t	height;
		uint32_t	vWidth;
		uint32_t	vHeight;
		uint32_t	pitch;
		uint32_t	bitDepth;
		uint32_t	x;
		uint32_t	y;
		void *		pointer;
		uint32_t	size;
		} FrameBufferDescription;

	static FrameBufferDescription FrameBufferInfo __attribute__((aligned (16))) = { 1024, 768, 1024, 768, 0, 24, 0, 0, 0, 0 };

	static void board_init(GDisplay *g, fbInfo *fbi) {
		// Initialize the Raspberry Pi frame buffer

		FrameBufferInfo.width = GDISP_SCREEN_WIDTH;
		FrameBufferInfo.height = GDISP_SCREEN_HEIGHT;
		FrameBufferInfo.vWidth = GDISP_SCREEN_WIDTH;
		FrameBufferInfo.vHeight = GDISP_SCREEN_HEIGHT;
		FrameBufferInfo.bitDepth = LLDCOLOR_BITS;

		rpi_writemailbox(1, 0x40000000 + (uint32_t) &FrameBufferInfo);

		if (rpi_readmailbox(1) != 0)
			gfxHalt("Could not set display parameters")
	
		// Set the details of the frame buffer
		g->g.Width = GDISP_SCREEN_WIDTH;
		g->g.Height = GDISP_SCREEN_HEIGHT;
		g->g.Backlight = 100;
		g->g.Contrast = 50;
		fbi->linelen = g->g.Width * sizeof(LLDCOLOR_TYPE);	// bytes per row
		fbi->pixels = FrameBufferInfo.pointer;				// pointer to the memory frame buffer
	}

	#if GDISP_HARDWARE_FLUSH
		static void board_flush(GDisplay *g) {
			(void) g;
		}
	#endif

	#if GDISP_NEED_CONTROL
		static void board_backlight(GDisplay *g, uint8_t percent) {
			(void) g;
			(void) percent;
		}

		static void board_contrast(GDisplay *g, uint8_t percent) {
			(void) g;
			(void) percent;
		}

		static void board_power(GDisplay *g, powermode_t pwr) {
			(void) g;
			(void) pwr;
		}
	#endif

#endif /* GDISP_DRIVER_VMT */