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