unleashed-firmware/lib/u8g2/u8g2_ll_hvline.c
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2022-01-05 19:10:18 +03:00

340 lines
9.4 KiB
C

/*
u8g2_ll_hvline.c
low level hvline
Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
Copyright (c) 2016, olikraus@gmail.com
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*ptr |= or_mask
*ptr ^= xor_mask
color = 0: or_mask = 1, xor_mask = 1
color = 1: or_mask = 1, xor_mask = 0
color = 2: or_mask = 0, xor_mask = 1
if ( color <= 1 )
or_mask = mask;
if ( color != 1 )
xor_mask = mask;
*/
#include "u8g2.h"
#include <assert.h>
/*=================================================*/
/*
u8g2_ll_hvline_vertical_top_lsb
SSD13xx
UC1701
*/
#ifdef U8G2_WITH_HVLINE_SPEED_OPTIMIZATION
/*
x,y Upper left position of the line within the local buffer (not the display!)
len length of the line in pixel, len must not be 0
dir 0: horizontal line (left to right)
1: vertical line (top to bottom)
asumption:
all clipping done
*/
void u8g2_ll_hvline_vertical_top_lsb(
u8g2_t* u8g2,
u8g2_uint_t x,
u8g2_uint_t y,
u8g2_uint_t len,
uint8_t dir) {
uint16_t offset;
uint8_t* ptr;
uint8_t bit_pos, mask;
uint8_t or_mask, xor_mask;
#ifdef __unix
uint8_t* max_ptr = u8g2->tile_buf_ptr +
u8g2_GetU8x8(u8g2)->display_info->tile_width * u8g2->tile_buf_height * 8;
#endif
//assert(x >= u8g2->buf_x0);
//assert(x < u8g2_GetU8x8(u8g2)->display_info->tile_width*8);
//assert(y >= u8g2->buf_y0);
//assert(y < u8g2_GetU8x8(u8g2)->display_info->tile_height*8);
/* bytes are vertical, lsb on top (y=0), msb at bottom (y=7) */
bit_pos = y; /* overflow truncate is ok here... */
bit_pos &= 7; /* ... because only the lowest 3 bits are needed */
mask = 1;
mask <<= bit_pos;
or_mask = 0;
xor_mask = 0;
if(u8g2->draw_color <= 1) or_mask = mask;
if(u8g2->draw_color != 1) xor_mask = mask;
offset = y; /* y might be 8 or 16 bit, but we need 16 bit, so use a 16 bit variable */
offset &= ~7;
offset *= u8g2_GetU8x8(u8g2)->display_info->tile_width;
ptr = u8g2->tile_buf_ptr;
ptr += offset;
ptr += x;
if(dir == 0) {
do {
#ifdef __unix
assert(ptr < max_ptr);
#endif
*ptr |= or_mask;
*ptr ^= xor_mask;
ptr++;
len--;
} while(len != 0);
} else {
do {
#ifdef __unix
assert(ptr < max_ptr);
#endif
*ptr |= or_mask;
*ptr ^= xor_mask;
bit_pos++;
bit_pos &= 7;
len--;
if(bit_pos == 0) {
ptr +=
u8g2->pixel_buf_width; /* 6 Jan 17: Changed u8g2->width to u8g2->pixel_buf_width, issue #148 */
if(u8g2->draw_color <= 1) or_mask = 1;
if(u8g2->draw_color != 1) xor_mask = 1;
} else {
or_mask <<= 1;
xor_mask <<= 1;
}
} while(len != 0);
}
}
#else /* U8G2_WITH_HVLINE_SPEED_OPTIMIZATION */
/*
x,y position within the buffer
*/
static void u8g2_draw_pixel_vertical_top_lsb(u8g2_t* u8g2, u8g2_uint_t x, u8g2_uint_t y) {
uint16_t offset;
uint8_t* ptr;
uint8_t bit_pos, mask;
//assert(x >= u8g2->buf_x0);
//assert(x < u8g2_GetU8x8(u8g2)->display_info->tile_width*8);
//assert(y >= u8g2->buf_y0);
//assert(y < u8g2_GetU8x8(u8g2)->display_info->tile_height*8);
/* bytes are vertical, lsb on top (y=0), msb at bottom (y=7) */
bit_pos = y; /* overflow truncate is ok here... */
bit_pos &= 7; /* ... because only the lowest 3 bits are needed */
mask = 1;
mask <<= bit_pos;
offset = y; /* y might be 8 or 16 bit, but we need 16 bit, so use a 16 bit variable */
offset &= ~7;
offset *= u8g2_GetU8x8(u8g2)->display_info->tile_width;
ptr = u8g2->tile_buf_ptr;
ptr += offset;
ptr += x;
if(u8g2->draw_color <= 1) *ptr |= mask;
if(u8g2->draw_color != 1) *ptr ^= mask;
}
/*
x,y Upper left position of the line within the local buffer (not the display!)
len length of the line in pixel, len must not be 0
dir 0: horizontal line (left to right)
1: vertical line (top to bottom)
asumption:
all clipping done
*/
void u8g2_ll_hvline_vertical_top_lsb(
u8g2_t* u8g2,
u8g2_uint_t x,
u8g2_uint_t y,
u8g2_uint_t len,
uint8_t dir) {
if(dir == 0) {
do {
u8g2_draw_pixel_vertical_top_lsb(u8g2, x, y);
x++;
len--;
} while(len != 0);
} else {
do {
u8g2_draw_pixel_vertical_top_lsb(u8g2, x, y);
y++;
len--;
} while(len != 0);
}
}
#endif /* U8G2_WITH_HVLINE_SPEED_OPTIMIZATION */
/*=================================================*/
/*
u8g2_ll_hvline_horizontal_right_lsb
ST7920
*/
#ifdef U8G2_WITH_HVLINE_SPEED_OPTIMIZATION
/*
x,y Upper left position of the line within the local buffer (not the display!)
len length of the line in pixel, len must not be 0
dir 0: horizontal line (left to right)
1: vertical line (top to bottom)
asumption:
all clipping done
*/
/* SH1122, LD7032, ST7920, ST7986, LC7981, T6963, SED1330, RA8835, MAX7219, LS0 */
void u8g2_ll_hvline_horizontal_right_lsb(
u8g2_t* u8g2,
u8g2_uint_t x,
u8g2_uint_t y,
u8g2_uint_t len,
uint8_t dir) {
uint16_t offset;
uint8_t* ptr;
uint8_t bit_pos;
uint8_t mask;
uint8_t tile_width = u8g2_GetU8x8(u8g2)->display_info->tile_width;
bit_pos = x; /* overflow truncate is ok here... */
bit_pos &= 7; /* ... because only the lowest 3 bits are needed */
mask = 128;
mask >>= bit_pos;
offset = y; /* y might be 8 or 16 bit, but we need 16 bit, so use a 16 bit variable */
offset *= tile_width;
offset += x >> 3;
ptr = u8g2->tile_buf_ptr;
ptr += offset;
if(dir == 0) {
do {
if(u8g2->draw_color <= 1) *ptr |= mask;
if(u8g2->draw_color != 1) *ptr ^= mask;
mask >>= 1;
if(mask == 0) {
mask = 128;
ptr++;
}
//x++;
len--;
} while(len != 0);
} else {
do {
if(u8g2->draw_color <= 1) *ptr |= mask;
if(u8g2->draw_color != 1) *ptr ^= mask;
ptr += tile_width;
//y++;
len--;
} while(len != 0);
}
}
#else /* U8G2_WITH_HVLINE_SPEED_OPTIMIZATION */
/*
x,y position within the buffer
*/
/* SH1122, LD7032, ST7920, ST7986, LC7981, T6963, SED1330, RA8835, MAX7219, LS0 */
static void u8g2_draw_pixel_horizontal_right_lsb(u8g2_t* u8g2, u8g2_uint_t x, u8g2_uint_t y) {
uint16_t offset;
uint8_t* ptr;
uint8_t bit_pos, mask;
//assert(x >= u8g2->buf_x0);
//assert(x < u8g2_GetU8x8(u8g2)->display_info->tile_width*8);
//assert(y >= u8g2->buf_y0);
//assert(y < u8g2_GetU8x8(u8g2)->display_info->tile_height*8);
/* bytes are vertical, lsb on top (y=0), msb at bottom (y=7) */
bit_pos = x; /* overflow truncate is ok here... */
bit_pos &= 7; /* ... because only the lowest 3 bits are needed */
mask = 128;
mask >>= bit_pos;
x >>= 3;
offset = y; /* y might be 8 or 16 bit, but we need 16 bit, so use a 16 bit variable */
offset *= u8g2_GetU8x8(u8g2)->display_info->tile_width;
offset += x;
ptr = u8g2->tile_buf_ptr;
ptr += offset;
if(u8g2->draw_color <= 1) *ptr |= mask;
if(u8g2->draw_color != 1) *ptr ^= mask;
}
/*
x,y Upper left position of the line within the local buffer (not the display!)
len length of the line in pixel, len must not be 0
dir 0: horizontal line (left to right)
1: vertical line (top to bottom)
asumption:
all clipping done
*/
/* SH1122, LD7032, ST7920, ST7986, LC7981, T6963, SED1330, RA8835, MAX7219, LS0 */
void u8g2_ll_hvline_horizontal_right_lsb(
u8g2_t* u8g2,
u8g2_uint_t x,
u8g2_uint_t y,
u8g2_uint_t len,
uint8_t dir) {
if(dir == 0) {
do {
u8g2_draw_pixel_horizontal_right_lsb(u8g2, x, y);
x++;
len--;
} while(len != 0);
} else {
do {
u8g2_draw_pixel_horizontal_right_lsb(u8g2, x, y);
y++;
len--;
} while(len != 0);
}
}
#endif /* U8G2_WITH_HVLINE_SPEED_OPTIMIZATION */