ep7312_lcd.c

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/*
 *	ep7312_lcd.c	---	Primary C Source file of 
 *						LCD Device Driver with Framebuffer
 *						for MGUI
 *	(C)opyright 2004 Bit 920 Labs
 *
 *	Written by: Ye Nan <[e-mail]>
 *	Created on: Sat. Mar 6 22:03:45 GMT +8:00 2004
 */

#ifndef __GAL_DRIVER_EP7312_C
#define __GAL_DRIVER_EP7312_C

#include <stdio.h>
#include <stdlib.h>

#include "../gal.h"
#include "ep7312_lcd.h"

// 设备文件指针
int LCD_FP = -1;

GAL_CLIP EP7312_clip;					/* clipping infomation */

// 检测设备文件是否打开
void Assert_Device(int DevType)
{
	int result = 0;

	// 根据设备类型检查相应的设备文件指针是否为空,
	// 为空: 设备文件尚未打开; 不为空:设备文件已打开
	switch (DevType)
	{
		case DEV_LCD:		/* 检查LCD设备状态 */
		{
			if (LCD_FP != -1)
				result = 1;
			else
				printf("No LCD Device opened.\n");
			
			break;
		}

		default:
			break;
	}

	// 如果设备文件尚未打开, 则终止程序执行
	if (!result)
		exit(1);
}

// 打开LCD设备
void OpenLCD(char * devFile)
{
	LCD_FP = open(devFile, 0);

	if (LCD_FP < 0)
	{
		printf("Cannot open LCD device: %s!\n", devFile);
		exit(1);
	}
}

// 关闭LCD设备
void CloseLCD()
{
	close(LCD_FP);
	LCD_FP = -1;
}

// Retrieve screen width
unsigned int EP7312_GetScreenWidth()
{
	return SCREEN_WIDTH;
}

// Retrieve screen height
unsigned int EP7312_GetScreenHeight()
{
	return SCREEN_HEIGHT;
}

// Retrieve screen bpp(bits per pixel)
unsigned int EP7312_GetScreenBpp()
{
	return SCREEN_BPP;
}

// Retrieve screen colors
unsigned int EP7312_GetScreenColors()
{
	return (1 << SCREEN_BPP);
}

void EP7312_PutPixel(int x, int y, gal_color color)
{
	struct lcd_display dis;

	Assert_Device(DEV_LCD);

	if (x < EP7312_clip.clipmin_x || x > EP7312_clip.clipmax_x ||
		y < EP7312_clip.clipmin_y || y > EP7312_clip.clipmax_y)
	{
		return;
	}

	dis.x1 = dis.x2 = x;
	dis.y1 = dis.y2 = y;
	dis.color = _COLOR24_12(color);

	ioctl(LCD_FP, LCD_Draw_Pixel, &dis);
}

gal_color EP7312_GetPixel(int x, int y)
{
}

void EP7312_DrawLine_V(int x, int y1, int y2, gal_color color)
{
	struct lcd_display dis;
	
	Assert_Device(DEV_LCD);

	y1 = (y1 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y1;
	y2 = (y2 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y2;
	y1 = (y1 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y1;
	y2 = (y2 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y2;

	if (x < EP7312_clip.clipmin_x || x > EP7312_clip.clipmax_x)
	{
		return;
	}

	if (y1 > y2)
	{
		short tmp;

		tmp = y1;
		y1 = y2;
		y2 = tmp;
	}

	dis.x1 = dis.x2 = x;
	dis.y1 = y1;
	dis.y2 = y2;
	dis.color = _COLOR24_12(color);

	ioctl(LCD_FP, LCD_Draw_VLine, &dis);
}

void EP7312_DrawLine_H(int x1, int x2, int y, gal_color color)
{
	struct lcd_display dis;
	
	Assert_Device(DEV_LCD);

	x1 = (x1 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x1; 
	x2 = (x2 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x2;
	x1 = (x1 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x1;
	x2 = (x2 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x2;

	if (y < EP7312_clip.clipmin_y || y > EP7312_clip.clipmax_y)
	{
		return; 
	}

	if (x1 > x2)
	{
		short tmp;

		tmp = x1;
		x1 = x2;
		x2 = tmp;
	}

	dis.x1 = x1;
	dis.x2 = x2;
	dis.y1 = dis.y2 = y;
	dis.color = _COLOR24_12(color);

	ioctl(LCD_FP, LCD_Draw_HLine, &dis);
}

void EP7312_DrawRect(int x1, int y1, int x2, int y2, gal_color color)
{
	struct lcd_display dis;
	
	Assert_Device(DEV_LCD);

	if (x1 > x2)
	{
		short tmp;

		tmp = x1;
		x1 = x2;
		x2 = tmp;
	}

	if (y1 > y2)
	{
		short tmp;

		tmp = y1;
		y1 = y2;
		y2 = tmp;
	}

	dis.x1 = x1;
	dis.y1 = y1;
	dis.x2 = x2;
	dis.y2 = y2;
	dis.color = _COLOR24_12(color);

	ioctl(LCD_FP, LCD_Draw_Rectangle, &dis);	
}

void EP7312_FillRect(int x1, int y1, int x2, int y2, gal_color color)
{
	struct lcd_display dis;
	int yLine;
		
	Assert_Device(DEV_LCD);

	if (x1 < EP7312_clip.clipmin_x || x1 > EP7312_clip.clipmax_x || 
		x2 < EP7312_clip.clipmin_x || x2 > EP7312_clip.clipmax_x ||
		y1 < EP7312_clip.clipmin_y || y1 > EP7312_clip.clipmax_y ||
		y2 < EP7312_clip.clipmin_y || y2 > EP7312_clip.clipmax_y)
	{
		x1 = (x1 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x1;
		x2 = (x2 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x2;
		y1 = (y1 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y1;
		y2 = (y2 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y2;

		x1 = (x1 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x1;
		x2 = (x2 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x2;
		y1 = (y1 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y1;
		y2 = (y2 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y2;
	}

	if (x1 > x2)
	{
		short tmp;

		tmp = x1;
		x1 = x2;
		x2 = tmp;
	}

	if (y1 > y2)
	{
		short tmp;

		tmp = y1;
		y1 = y2;
		y2 = tmp;
	}

	dis.x1 = x1;
	dis.x2 = x2;
	dis.color = _COLOR24_12(color);

	for (yLine = y1; yLine <= y2; yLine++)
	{
		dis.y1 = dis.y2 = yLine;
		ioctl(LCD_FP, LCD_Draw_HLine, &dis);
	}
}

void EP7312_Clear(gal_color color)
{
	EP7312_FillRect(EP7312_clip.clipmin_x, EP7312_clip.clipmin_y,
					EP7312_clip.clipmax_x, EP7312_clip.clipmax_y, color);
}


void EP7312_SaveRange(int x1, int y1, int x2, int y2, unsigned char * buffer, int * sw, int *sh)
{
	struct lcd_screen dis;
	struct save_struct ss_buf;
	
	Assert_Device(DEV_LCD);

	if (x1 < EP7312_clip.clipmin_x || x1 > EP7312_clip.clipmax_x || 
		x2 < EP7312_clip.clipmin_x || x2 > EP7312_clip.clipmax_x ||
		y1 < EP7312_clip.clipmin_y || y1 > EP7312_clip.clipmax_y ||
		y2 < EP7312_clip.clipmin_y || y2 > EP7312_clip.clipmax_y)
	{
		x1 = (x1 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x1;
		x2 = (x2 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x2;
		y1 = (y1 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y1;
		y2 = (y2 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y2;

		x1 = (x1 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x1;
		x2 = (x2 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x2;
		y1 = (y1 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y1;
		y2 = (y2 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y2;
	}

	if (x1 > x2)
	{
		short tmp;

		tmp = x1;
		x1 = x2;
		x2 = tmp;
	}

	if (y1 > y2)
	{
		short tmp;

		tmp = y1;
		y1 = y2;
		y2 = tmp;
	}

	ss_buf.save_buf = buffer;
	dis.x1 = x1;
	dis.x2 = x2;
	dis.y1 = y1;
	dis.y2 = y2;
	dis.buffer = &ss_buf;

	ioctl(LCD_FP, LCD_Save_SCR, &dis);

	if (sw != NULL)
		*sw = ss_buf.save_w;
	if (sh != NULL)
		*sh = ss_buf.save_h;

//	printf("[Load]: buffer = 0x%08X\n", buffer);
}

void EP7312_LoadRange(int x1, int y1, int x2, int y2, unsigned char * buffer, int sw, int sh)
{
	struct lcd_screen dis;
	struct save_struct ss_buf;
	
	Assert_Device(DEV_LCD);

	if (x1 < EP7312_clip.clipmin_x || x1 > EP7312_clip.clipmax_x || 
		x2 < EP7312_clip.clipmin_x || x2 > EP7312_clip.clipmax_x ||
		y1 < EP7312_clip.clipmin_y || y1 > EP7312_clip.clipmax_y ||
		y2 < EP7312_clip.clipmin_y || y2 > EP7312_clip.clipmax_y)
	{
		x1 = (x1 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x1;
		x2 = (x2 < EP7312_clip.clipmin_x) ? EP7312_clip.clipmin_x : x2;
		y1 = (y1 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y1;
		y2 = (y2 < EP7312_clip.clipmin_y) ? EP7312_clip.clipmin_y : y2;

		x1 = (x1 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x1;
		x2 = (x2 > EP7312_clip.clipmax_x) ? EP7312_clip.clipmax_x : x2;
		y1 = (y1 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y1;
		y2 = (y2 > EP7312_clip.clipmax_y) ? EP7312_clip.clipmax_y : y2;
	}

	if (x1 > x2)
	{
		short tmp;

		tmp = x1;
		x1 = x2;
		x2 = tmp;
	}

	if (y1 > y2)
	{
		short tmp;

		tmp = y1;
		y1 = y2;
		y2 = tmp;
	}

//	printf("[Load]: buffer = 0x%08X\n", buffer);
	ss_buf.save_buf = buffer;
	ss_buf.save_w = x2 - x1 + 1;
	ss_buf.save_h = y2 - y1 + 1;

	dis.x1 = dis.x2 = x1;
	dis.y1 = dis.y2 = y1;
	dis.buffer = &ss_buf;

	ioctl(LCD_FP, LCD_Load_SCR, &dis);
}

// GAL Interface functions
int InitLCD_EP7312(GFX * gfx)
{
	if (strcmp(gfx->gfx_id, "EP7312_LCD") != 0)
		return -1;

	OpenLCD("/dev/LCD");

	// Initialize clipping infomation
	EP7312_clip.clipmin_x = 0;
	EP7312_clip.clipmin_y = 0;
	EP7312_clip.clipmax_x = SCREEN_WIDTH - 1;
	EP7312_clip.clipmax_y = SCREEN_HEIGHT - 1 ;

    
	gfx->gfx_width		= EP7312_GetScreenWidth();
	gfx->gfx_height		= EP7312_GetScreenHeight();
	gfx->gfx_bpp		= EP7312_GetScreenBpp();
	gfx->gfx_colors		= EP7312_GetScreenColors();
	gfx->gfx_clip		= &EP7312_clip;

	gfx->putpixel		= EP7312_PutPixel;
	gfx->getpixel		= NULL;

	gfx->drawvline		= EP7312_DrawLine_V;
	gfx->drawhline		= EP7312_DrawLine_H;

	gfx->drawrect		= EP7312_DrawRect;
	gfx->fillrect		= EP7312_FillRect;

	gfx->drawellipse	= NULL;
	gfx->fillellipse	= NULL;
	gfx->drawcircle		= NULL;
	gfx->fillcircle		= NULL;

	gfx->putchar		= NULL;
	gfx->putstr			= NULL;

	gfx->clearscreen	= EP7312_Clear;

	gfx->saverange		= EP7312_SaveRange;
	gfx->loadrange		= EP7312_LoadRange;

	return 0;
}

void ReleaseLCD_EP7312(GFX * gfx)
{
	CloseLCD();
}

#endif	// __GAL_DRIVER_EP7312_C