1 // SPDX-License-Identifier: GPL-2.0
24 static void draw_byte_32(const unsigned char *bits, unsigned int *base, int rb);
25 static void draw_byte_16(const unsigned char *bits, unsigned int *base, int rb);
26 static void draw_byte_8(const unsigned char *bits, unsigned int *base, int rb);
47 		return -EINVAL;  in btext_initialize()
49 		return -EINVAL;  in btext_initialize()
51 		return -EINVAL;  in btext_initialize()
68 		return -EINVAL;  in btext_initialize()
79 	dispDeviceRect[3] = height;  in btext_initialize()
84 /* Calc the base address of a given point (x,y) */
85 static unsigned char * calc_base(int x, int y)  in calc_base()  argument
87 	unsigned char *base = dispDeviceBase;  in calc_base()  local
89 	base += (x + dispDeviceRect[0]) * (dispDeviceDepth >> 3);  in calc_base()
90 	base += (y + dispDeviceRect[1]) * dispDeviceRowBytes;  in calc_base()
91 	return base;  in calc_base()
96 	unsigned int *base	= (unsigned int *)calc_base(0, 0);  in btext_clearscreen()  local
97 	unsigned long width 	= ((dispDeviceRect[2] - dispDeviceRect[0]) *  in btext_clearscreen()
98 					(dispDeviceDepth >> 3)) >> 2;  in btext_clearscreen()
101 	for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1]); i++)  in btext_clearscreen()
103 		unsigned int *ptr = base;  in btext_clearscreen()
104 		for(j=width; j; --j)  in btext_clearscreen()
106 		base += (dispDeviceRowBytes >> 2);  in btext_clearscreen()
115 	unsigned long width    	= ((dispDeviceRect[2] - dispDeviceRect[0]) *  in scrollscreen()
116 				   (dispDeviceDepth >> 3)) >> 2;  in scrollscreen()
119 	for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1] - 16); i++)  in scrollscreen()
123 		for(j=width; j; --j)  in scrollscreen()
131 		for(j=width; j; --j)  in scrollscreen()
142 	int x;  in btext_drawchar()  local
147 			--g_loc_X;  in btext_drawchar()
150 		g_loc_X = (g_loc_X & -8) + 8;  in btext_drawchar()
171 		g_loc_Y--;  in btext_drawchar()
175 	   waste time scrolling each line.  -- paulus. */  in btext_drawchar()
179 		for (x = 0; x < g_max_loc_X; ++x)  in btext_drawchar()
180 			draw_byte(' ', x, g_loc_Y);  in btext_drawchar()
187 	while (len--)  in btext_drawtext()
193 	unsigned char *base	= calc_base(locX << 3, locY << 4);  in draw_byte()  local
201 		draw_byte_32(font, (unsigned int *)base, rb);  in draw_byte()
205 		draw_byte_16(font, (unsigned int *)base, rb);  in draw_byte()
208 		draw_byte_8(font, (unsigned int *)base, rb);  in draw_byte()
240 static void draw_byte_32(const unsigned char *font, unsigned int *base, int rb)  in draw_byte_32()  argument
249 		base[0] = (-(bits >> 7) & fg) ^ bg;  in draw_byte_32()
250 		base[1] = (-((bits >> 6) & 1) & fg) ^ bg;  in draw_byte_32()
251 		base[2] = (-((bits >> 5) & 1) & fg) ^ bg;  in draw_byte_32()
252 		base[3] = (-((bits >> 4) & 1) & fg) ^ bg;  in draw_byte_32()
253 		base[4] = (-((bits >> 3) & 1) & fg) ^ bg;  in draw_byte_32()
254 		base[5] = (-((bits >> 2) & 1) & fg) ^ bg;  in draw_byte_32()
255 		base[6] = (-((bits >> 1) & 1) & fg) ^ bg;  in draw_byte_32()
256 		base[7] = (-(bits & 1) & fg) ^ bg;  in draw_byte_32()
257 		base = (unsigned int *) ((char *)base + rb);  in draw_byte_32()
261 static void draw_byte_16(const unsigned char *font, unsigned int *base, int rb)  in draw_byte_16()  argument
271 		base[0] = (eb[bits >> 6] & fg) ^ bg;  in draw_byte_16()
272 		base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg;  in draw_byte_16()
273 		base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg;  in draw_byte_16()
274 		base[3] = (eb[bits & 3] & fg) ^ bg;  in draw_byte_16()
275 		base = (unsigned int *) ((char *)base + rb);  in draw_byte_16()
279 static void draw_byte_8(const unsigned char *font, unsigned int *base, int rb)  in draw_byte_8()  argument
289 		base[0] = (eb[bits >> 4] & fg) ^ bg;  in draw_byte_8()
290 		base[1] = (eb[bits & 0xf] & fg) ^ bg;  in draw_byte_8()
291 		base = (unsigned int *) ((char *)base + rb);  in draw_byte_8()
316 		return -ENODEV;  in btext_find_display()
318 		return -ENODEV;  in btext_find_display()