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311 lines
8.8 KiB
311 lines
8.8 KiB
#include "drawing.h"
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#include "display_spec.h"
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#include "font.h"
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extern uint8_t LCD_displayMap[LCD_WIDTH * LCD_HEIGHT / 8];
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// This function sets a pixel on displayMap to your preferred
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// color. 1=Black, 0= white.
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void LCD_setPixel(int x, int y, enum Color bw)
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{
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// First, double check that the coordinate is in range.
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if ((x >= 0) && (x < LCD_WIDTH) && (y >= 0) && (y < LCD_HEIGHT)) {
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uint8_t shift = y % 8;
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if (bw) // If black, set the bit.
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LCD_displayMap[x + (y / 8) * LCD_WIDTH] |= 1 << shift;
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else // If white clear the bit.
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LCD_displayMap[x + (y / 8) * LCD_WIDTH] &= ~(1 << shift);
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}
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}
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// setLine draws a line from x0,y0 to x1,y1 with the set color.
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// This function was grabbed from the SparkFun ColorLCDShield
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// library.
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void LCD_setLine(int x0, int y0, int x1, int y1, enum Color bw)
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{
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int dy = y1 - y0; // Difference between y0 and y1
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int dx = x1 - x0; // Difference between x0 and x1
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int stepx, stepy;
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if (dy < 0) {
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dy = -dy;
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stepy = -1;
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}
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else
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stepy = 1;
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if (dx < 0) {
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dx = -dx;
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stepx = -1;
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}
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else
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stepx = 1;
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dy <<= 1; // dy is now 2*dy
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dx <<= 1; // dx is now 2*dx
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LCD_setPixel(x0, y0, bw); // Draw the first pixel.
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if (dx > dy) {
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int fraction = dy - (dx >> 1);
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while (x0 != x1) {
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if (fraction >= 0) {
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y0 += stepy;
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fraction -= dx;
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}
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x0 += stepx;
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fraction += dy;
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LCD_setPixel(x0, y0, bw);
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}
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}
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else {
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int fraction = dx - (dy >> 1);
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while (y0 != y1) {
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if (fraction >= 0) {
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x0 += stepx;
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fraction -= dy;
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}
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y0 += stepy;
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fraction += dx;
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LCD_setPixel(x0, y0, bw);
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}
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}
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}
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// setRect will draw a rectangle from x0,y0 top-left corner to
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// a x1,y1 bottom-right corner. Can be filled with the fill
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// parameter, and colored with bw.
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// This function was grabbed from the SparkFun ColorLCDShield
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// library.
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void LCD_setRect(int x0, int y0, int x1, int y1, bool fill, enum Color bw)
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{
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// check if the rectangle is to be filled
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if (fill == 1) {
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int xDiff;
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if (x0 > x1)
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xDiff = x0 - x1; //Find the difference between the x vars
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else
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xDiff = x1 - x0;
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while (xDiff > 0) {
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LCD_setLine(x0, y0, x0, y1, bw);
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if (x0 > x1)
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x0--;
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else
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x0++;
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xDiff--;
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}
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}
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else {
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// best way to draw an unfilled rectangle is to draw four lines
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LCD_setLine(x0, y0, x1, y0, bw);
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LCD_setLine(x0, y1, x1, y1, bw);
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LCD_setLine(x0, y0, x0, y1, bw);
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LCD_setLine(x1, y0, x1, y1, bw);
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}
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}
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// setCircle draws a circle centered around x0,y0 with a defined
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// radius. The circle can be black or white. And have a line
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// thickness ranging from 1 to the radius of the circle.
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// This function was grabbed from the SparkFun ColorLCDShield
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// library.
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void LCD_setCircle(int x0, int y0, int radius, enum Color bw, int lineThickness)
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{
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for (int r = 0; r < lineThickness; r++) {
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int f = 1 - radius;
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int ddF_x = 0;
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int ddF_y = -2 * radius;
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int x = 0;
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int y = radius;
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LCD_setPixel(x0, y0 + radius, bw);
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LCD_setPixel(x0, y0 - radius, bw);
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LCD_setPixel(x0 + radius, y0, bw);
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LCD_setPixel(x0 - radius, y0, bw);
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while (x < y) {
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if (f >= 0) {
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y--;
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ddF_y += 2;
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f += ddF_y;
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}
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x++;
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ddF_x += 2;
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f += ddF_x + 1;
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LCD_setPixel(x0 + x, y0 + y, bw);
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LCD_setPixel(x0 - x, y0 + y, bw);
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LCD_setPixel(x0 + x, y0 - y, bw);
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LCD_setPixel(x0 - x, y0 - y, bw);
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LCD_setPixel(x0 + y, y0 + x, bw);
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LCD_setPixel(x0 - y, y0 + x, bw);
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LCD_setPixel(x0 + y, y0 - x, bw);
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LCD_setPixel(x0 - y, y0 - x, bw);
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}
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radius--;
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}
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}
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static void LCD_setCharEx(struct Utf8Char character, int x, int y, enum Color color, struct TextStyle style)
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{
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const struct FontGraphic *symbol = Font_GetSymbol(character);
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uint8_t column; // temp byte to store character's column bitmap
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for (int i = 0; i < 5; i++) // 5 columns (x) per character
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{
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column = symbol->columns[i];
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for (int j = 0; j < 8; j++) // 8 rows (y) per character
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{
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bool bit = column & (1 << j);
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if (style.size == FONT_NORMAL) {
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if (bit) {// test bits to set pixels
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LCD_setPixel(x + i, y + j, color);
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}
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else if (style.bg) {
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LCD_setPixel(x + i, y + j, !color);
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}
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}
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else if (style.size == FONT_DOUBLE) {
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if (bit) {// test bits to set pixels
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LCD_setPixel(x + i * 2, y + j * 2, color);
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LCD_setPixel(x + i * 2 + 1, y + j * 2, color);
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LCD_setPixel(x + i * 2, y + j * 2 + 1, color);
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LCD_setPixel(x + i * 2 + 1, y + j * 2 + 1, color);
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}
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else if (style.bg) {
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LCD_setPixel(x + i * 2, y + j * 2, !color);
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LCD_setPixel(x + i * 2 + 1, y + j * 2, !color);
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LCD_setPixel(x + i * 2, y + j * 2 + 1, !color);
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LCD_setPixel(x + i * 2 + 1, y + j * 2 + 1, !color);
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}
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}
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else if (style.size == FONT_BOLD) {
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if (bit) {// test bits to set pixels
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LCD_setPixel(x + i, y + j, color);
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LCD_setPixel(x + i + 1, y + j, color);
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}
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else if (style.bg) {
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LCD_setPixel(x + i, y + j, !color);
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LCD_setPixel(x + i + 1, y + j, !color);
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}
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}
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}
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}
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}
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// setStr draws a string of characters, calling setChar with
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// progressive coordinates until it's done.
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// This function was grabbed from the SparkFun ColorLCDShield
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// library.
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void LCD_setStr(const char *dString, int x, int y, enum Color bw)
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{
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LCD_setStrEx(dString, x, y, bw, (struct TextStyle) {});
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}
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static const int char_widths[] = {
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[FONT_NORMAL] = 5,
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[FONT_DOUBLE] = 10,
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[FONT_BOLD] = 6
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};
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static const int char_spacings[] = {
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[FONT_NORMAL] = 1,
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[FONT_DOUBLE] = 2,
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[FONT_BOLD] = 1
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};
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static const int char_heights[] = {
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[FONT_NORMAL] = 8,
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[FONT_DOUBLE] = 16,
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[FONT_BOLD] = 8
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};
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// setStr draws a string of characters, calling setChar with
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// progressive coordinates until it's done.
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// This function was grabbed from the SparkFun ColorLCDShield
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// library. AND HEAVILY MODIFIED
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void LCD_setStrEx(const char *dString, int x, int y, enum Color color, struct TextStyle style)
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{
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const int x0 = x;
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struct Utf8Iterator iter;
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Utf8Iterator_Init(&iter, dString);
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int charw = char_widths[style.size];
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int charh = char_heights[style.size];
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int spacingx = char_spacings[style.size] + style.spacing_x;
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int spacingy = style.spacing_y;
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struct Utf8Char uchar;
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int limit = style.max_chars;
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while ((uchar = Utf8Iterator_Next(&iter)).uint) {
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LCD_setCharEx(uchar, x, y, color, style);
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if (limit > 0) {
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limit -= 1;
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if (limit == 0) return;
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}
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x += charw;
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if (style.bg) {
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for (int i = y; i < y + charh; i++) {
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for (int j = x; j < x + spacingx; j++) {
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LCD_setPixel(j, i, !color);
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}
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}
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}
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x += spacingx;
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if (x > (LCD_WIDTH - charw)) {
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if (style.nowrap) break;
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if (style.wrap_to_0) {
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x = 0;
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} else {
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x = x0;
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}
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y += charh + spacingy;
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}
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// no more characters could be seen
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if (y >= LCD_HEIGHT) {
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break;
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}
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}
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}
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// This function will draw an array over the screen. (For now) the
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// array must be the same size as the screen, covering the entirety
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// of the display.
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void LCD_setBitmap(const uint8_t *bitArray)
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{
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for (int i = 0; i < (LCD_WIDTH * LCD_HEIGHT / 8); i++) {
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LCD_displayMap[i] = bitArray[i];
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}
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}
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// This function clears the entire display either white (0) or
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// black (1).
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// The screen won't actually clear until you call updateDisplay()!
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void LCD_clearDisplay(enum Color bw)
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{
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for (int i = 0; i < (LCD_WIDTH * LCD_HEIGHT / 8); i++) {
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if (bw)
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LCD_displayMap[i] = 0xFF;
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else
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LCD_displayMap[i] = 0;
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}
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}
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void LCD_invertDisplayData()
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{
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/* Indirect, swap bits in displayMap option: */
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for (int i = 0; i < (LCD_WIDTH * LCD_HEIGHT / 8); i++) {
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LCD_displayMap[i] ^= 0xFF;
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}
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}
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