mirror of https://github.com/ARMmbed/mbed-os.git
565 lines
12 KiB
C++
565 lines
12 KiB
C++
/* mbed library for the mbed Lab Board 128*32 pixel LCD
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* use C12832 controller
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* Copyright (c) 2012 Peter Drescher - DC2PD
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* Released under the MIT License: http://mbed.org/license/mit
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// 13.10.12 initial design
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// 25.10.12 add autorefresh of screen
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// 25.10.12 add standart font
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// 20.12.12 add bitmap graphics
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// optional defines :
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// #define debug_lcd 1
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#include "C12832.h"
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#include "mbed.h"
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#include "stdio.h"
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#include "Small_7.h"
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#define BPP 1 // Bits per pixel
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C12832::C12832(PinName mosi, PinName sck, PinName reset, PinName a0, PinName ncs, const char* name)
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: GraphicsDisplay(name),_spi(mosi,NC,sck),_reset(reset),_A0(a0),_CS(ncs)
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{
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orientation = 1;
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draw_mode = NORMAL;
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char_x = 0;
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lcd_reset();
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}
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int C12832::width()
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{
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if (orientation == 0 || orientation == 2) return 32;
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else return 128;
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}
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int C12832::height()
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{
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if (orientation == 0 || orientation == 2) return 128;
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else return 32;
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}
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void C12832::invert(unsigned int o)
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{
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if(o == 0) wr_cmd(0xA6);
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else wr_cmd(0xA7);
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}
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void C12832::set_contrast(unsigned int o)
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{
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contrast = o;
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wr_cmd(0x81); // set volume
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wr_cmd(o & 0x3F);
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}
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unsigned int C12832::get_contrast(void)
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{
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return(contrast);
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}
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// write command to lcd controller
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void C12832::wr_cmd(unsigned char cmd)
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{
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_A0 = 0;
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_CS = 0;
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_spi.write(cmd);
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_CS = 1;
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}
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// write data to lcd controller
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void C12832::wr_dat(unsigned char dat)
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{
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_A0 = 1;
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_CS = 0;
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_spi.write(dat);
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_CS = 1;
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}
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// reset and init the lcd controller
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void C12832::lcd_reset()
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{
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_spi.format(8,3); // 8 bit spi mode 3
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_spi.frequency(20000000); // 19,2 Mhz SPI clock
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_A0 = 0;
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_CS = 1;
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_reset = 0; // display reset
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wait_us(50);
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_reset = 1; // end reset
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wait_ms(5);
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/* Start Initial Sequence ----------------------------------------------------*/
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wr_cmd(0xAE); // display off
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wr_cmd(0xA2); // bias voltage
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wr_cmd(0xA0);
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wr_cmd(0xC8); // colum normal
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wr_cmd(0x22); // voltage resistor ratio
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wr_cmd(0x2F); // power on
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//wr_cmd(0xA4); // LCD display ram
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wr_cmd(0x40); // start line = 0
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wr_cmd(0xAF); // display ON
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wr_cmd(0x81); // set contrast
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wr_cmd(0x17); // set contrast
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wr_cmd(0xA6); // display normal
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// clear and update LCD
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memset(buffer,0x00,512); // clear display buffer
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copy_to_lcd();
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auto_up = 1; // switch on auto update
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// dont do this by default. Make the user call
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//claim(stdout); // redirekt printf to lcd
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locate(0,0);
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set_font((unsigned char*)Small_7); // standart font
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}
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// set one pixel in buffer
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void C12832::pixel(int x, int y, int color)
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{
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// first check parameter
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if(x > 128 || y > 32 || x < 0 || y < 0) return;
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if(draw_mode == NORMAL) {
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if(color == 0)
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buffer[x + ((y/8) * 128)] &= ~(1 << (y%8)); // erase pixel
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else
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buffer[x + ((y/8) * 128)] |= (1 << (y%8)); // set pixel
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} else { // XOR mode
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if(color == 1)
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buffer[x + ((y/8) * 128)] ^= (1 << (y%8)); // xor pixel
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}
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}
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// update lcd
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void C12832::copy_to_lcd(void)
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{
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int i=0;
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//page 0
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wr_cmd(0x00); // set column low nibble 0
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wr_cmd(0x10); // set column hi nibble 0
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wr_cmd(0xB0); // set page address 0
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_A0 = 1;
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for(i=0; i<128; i++) {
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wr_dat(buffer[i]);
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}
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// page 1
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wr_cmd(0x00); // set column low nibble 0
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wr_cmd(0x10); // set column hi nibble 0
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wr_cmd(0xB1); // set page address 1
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_A0 = 1;
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for(i=128; i<256; i++) {
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wr_dat(buffer[i]);
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}
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//page 2
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wr_cmd(0x00); // set column low nibble 0
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wr_cmd(0x10); // set column hi nibble 0
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wr_cmd(0xB2); // set page address 2
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_A0 = 1;
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for(i=256; i<384; i++) {
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wr_dat(buffer[i]);
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}
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//page 3
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wr_cmd(0x00); // set column low nibble 0
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wr_cmd(0x10); // set column hi nibble 0
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wr_cmd(0xB3); // set page address 3
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_A0 = 1;
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_CS = 0;
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for(i=384; i<512; i++) {
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wr_dat(buffer[i]);
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}
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}
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void C12832::cls(void)
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{
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memset(buffer,0x00,512); // clear display buffer
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copy_to_lcd();
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}
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void C12832::line(int x0, int y0, int x1, int y1, int color)
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{
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int dx = 0, dy = 0;
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int dx_sym = 0, dy_sym = 0;
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int dx_x2 = 0, dy_x2 = 0;
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int di = 0;
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dx = x1-x0;
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dy = y1-y0;
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// if (dx == 0) { /* vertical line */
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// if (y1 > y0) vline(x0,y0,y1,color);
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// else vline(x0,y1,y0,color);
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// return;
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// }
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if (dx > 0) {
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dx_sym = 1;
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} else {
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dx_sym = -1;
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}
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// if (dy == 0) { /* horizontal line */
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// if (x1 > x0) hline(x0,x1,y0,color);
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// else hline(x1,x0,y0,color);
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// return;
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// }
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if (dy > 0) {
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dy_sym = 1;
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} else {
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dy_sym = -1;
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}
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dx = dx_sym*dx;
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dy = dy_sym*dy;
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dx_x2 = dx*2;
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dy_x2 = dy*2;
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if (dx >= dy) {
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di = dy_x2 - dx;
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while (x0 != x1) {
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pixel(x0, y0, color);
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x0 += dx_sym;
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if (di<0) {
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di += dy_x2;
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} else {
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di += dy_x2 - dx_x2;
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y0 += dy_sym;
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}
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}
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pixel(x0, y0, color);
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} else {
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di = dx_x2 - dy;
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while (y0 != y1) {
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pixel(x0, y0, color);
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y0 += dy_sym;
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if (di < 0) {
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di += dx_x2;
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} else {
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di += dx_x2 - dy_x2;
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x0 += dx_sym;
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}
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}
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pixel(x0, y0, color);
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}
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if(auto_up) copy_to_lcd();
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}
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void C12832::rect(int x0, int y0, int x1, int y1, int color)
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{
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if (x1 > x0) line(x0,y0,x1,y0,color);
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else line(x1,y0,x0,y0,color);
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if (y1 > y0) line(x0,y0,x0,y1,color);
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else line(x0,y1,x0,y0,color);
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if (x1 > x0) line(x0,y1,x1,y1,color);
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else line(x1,y1,x0,y1,color);
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if (y1 > y0) line(x1,y0,x1,y1,color);
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else line(x1,y1,x1,y0,color);
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if(auto_up) copy_to_lcd();
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}
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void C12832::fillrect(int x0, int y0, int x1, int y1, int color)
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{
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int l,c,i;
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if(x0 > x1) {
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i = x0;
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x0 = x1;
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x1 = i;
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}
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if(y0 > y1) {
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i = y0;
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y0 = y1;
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y1 = i;
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}
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for(l = x0; l<= x1; l ++) {
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for(c = y0; c<= y1; c++) {
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pixel(l,c,color);
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}
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}
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if(auto_up) copy_to_lcd();
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}
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void C12832::circle(int x0, int y0, int r, int color)
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{
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int draw_x0, draw_y0;
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int draw_x1, draw_y1;
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int draw_x2, draw_y2;
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int draw_x3, draw_y3;
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int draw_x4, draw_y4;
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int draw_x5, draw_y5;
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int draw_x6, draw_y6;
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int draw_x7, draw_y7;
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int xx, yy;
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int di;
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//WindowMax();
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if (r == 0) { /* no radius */
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return;
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}
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draw_x0 = draw_x1 = x0;
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draw_y0 = draw_y1 = y0 + r;
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if (draw_y0 < height()) {
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pixel(draw_x0, draw_y0, color); /* 90 degree */
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}
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draw_x2 = draw_x3 = x0;
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draw_y2 = draw_y3 = y0 - r;
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if (draw_y2 >= 0) {
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pixel(draw_x2, draw_y2, color); /* 270 degree */
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}
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draw_x4 = draw_x6 = x0 + r;
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draw_y4 = draw_y6 = y0;
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if (draw_x4 < width()) {
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pixel(draw_x4, draw_y4, color); /* 0 degree */
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}
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draw_x5 = draw_x7 = x0 - r;
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draw_y5 = draw_y7 = y0;
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if (draw_x5>=0) {
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pixel(draw_x5, draw_y5, color); /* 180 degree */
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}
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if (r == 1) {
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return;
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}
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di = 3 - 2*r;
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xx = 0;
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yy = r;
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while (xx < yy) {
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if (di < 0) {
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di += 4*xx + 6;
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} else {
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di += 4*(xx - yy) + 10;
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yy--;
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draw_y0--;
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draw_y1--;
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draw_y2++;
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draw_y3++;
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draw_x4--;
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draw_x5++;
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draw_x6--;
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draw_x7++;
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}
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xx++;
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draw_x0++;
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draw_x1--;
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draw_x2++;
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draw_x3--;
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draw_y4++;
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draw_y5++;
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draw_y6--;
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draw_y7--;
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if ( (draw_x0 <= width()) && (draw_y0>=0) ) {
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pixel(draw_x0, draw_y0, color);
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}
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if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) {
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pixel(draw_x1, draw_y1, color);
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}
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if ( (draw_x2 <= width()) && (draw_y2 <= height()) ) {
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pixel(draw_x2, draw_y2, color);
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}
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if ( (draw_x3 >=0 ) && (draw_y3 <= height()) ) {
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pixel(draw_x3, draw_y3, color);
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}
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if ( (draw_x4 <= width()) && (draw_y4 >= 0) ) {
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pixel(draw_x4, draw_y4, color);
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}
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if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) {
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pixel(draw_x5, draw_y5, color);
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}
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if ( (draw_x6 <=width()) && (draw_y6 <= height()) ) {
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pixel(draw_x6, draw_y6, color);
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}
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if ( (draw_x7 >= 0) && (draw_y7 <= height()) ) {
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pixel(draw_x7, draw_y7, color);
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}
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}
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if(auto_up) copy_to_lcd();
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}
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void C12832::fillcircle(int x, int y, int r, int color)
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{
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int i,up;
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up = auto_up;
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auto_up = 0; // off
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for (i = 0; i <= r; i++)
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circle(x,y,i,color);
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auto_up = up;
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if(auto_up) copy_to_lcd();
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}
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void C12832::setmode(int mode)
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{
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draw_mode = mode;
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}
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void C12832::locate(int x, int y)
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{
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char_x = x;
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char_y = y;
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}
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int C12832::columns()
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{
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return width() / font[1];
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}
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int C12832::rows()
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{
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return height() / font[2];
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}
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int C12832::_putc(int value)
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{
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if (value == '\n') { // new line
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char_x = 0;
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char_y = char_y + font[2];
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if (char_y >= height() - font[2]) {
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char_y = 0;
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}
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} else {
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character(char_x, char_y, value);
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if(auto_up) copy_to_lcd();
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}
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return value;
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}
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void C12832::character(int x, int y, int c)
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{
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unsigned int hor,vert,offset,bpl,j,i,b;
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unsigned char* zeichen;
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unsigned char z,w;
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if ((c < 31) || (c > 127)) return; // test char range
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// read font parameter from start of array
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offset = font[0]; // bytes / char
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hor = font[1]; // get hor size of font
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vert = font[2]; // get vert size of font
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bpl = font[3]; // bytes per line
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if (char_x + hor > width()) {
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char_x = 0;
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char_y = char_y + vert;
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if (char_y >= height() - font[2]) {
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char_y = 0;
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}
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}
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zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
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w = zeichen[0]; // width of actual char
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// construct the char into the buffer
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for (j=0; j<vert; j++) { // vert line
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for (i=0; i<hor; i++) { // horz line
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z = zeichen[bpl * i + ((j & 0xF8) >> 3)+1];
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b = 1 << (j & 0x07);
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if (( z & b ) == 0x00) {
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pixel(x+i,y+j,0);
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} else {
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pixel(x+i,y+j,1);
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}
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}
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}
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char_x += w;
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}
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void C12832::set_font(unsigned char* f)
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{
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font = f;
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}
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void C12832::set_auto_up(unsigned int up)
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{
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if(up ) auto_up = 1;
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else auto_up = 0;
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}
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unsigned int C12832::get_auto_up(void)
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{
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return (auto_up);
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}
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void C12832::print_bm(Bitmap bm, int x, int y)
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{
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int h,v,b;
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char d;
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for(v=0; v < bm.ySize; v++) { // lines
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for(h=0; h < bm.xSize; h++) { // pixel
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if(h + x > 127) break;
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if(v + y > 31) break;
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d = bm.data[bm.Byte_in_Line * v + ((h & 0xF8) >> 3)];
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b = 0x80 >> (h & 0x07);
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if((d & b) == 0) {
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pixel(x+h,y+v,0);
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} else {
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pixel(x+h,y+v,1);
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}
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}
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}
|
|
|
|
}
|
|
|
|
|