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toaster-oven-bluepill/Lib/ufb/Src/framebuffer.c

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7.8 KiB

//
// Created by MightyPork on 2022/11/12.
//
#include "ufb/framebuffer.h"
#include "ufb/progmem.h"
#define MIN(a, b) ((a)>(b)?(b):(a))
#define MAX(a, b) ((a)>(b)?(a):(b))
#include <string.h>
uint8_t fb[FB_LEN];
/** Fill with a vertical pattern, 1 byte */
void fb_fill(uint8_t pattern)
{
memset(fb, pattern, sizeof(fb));
}
static void draw_mask(fbsize_t idx, uint8_t mask, fbcolor_t color)
{
if (color != 0) {
fb[idx] |= mask;
} else {
fb[idx] &= ~mask;
}
}
void fb_fill_pattern(const uint8_t *pattern, uint8_t pattern_len, fbcolor_t color)
{
uint8_t p = 0;
for (fbsize_t i = 0; i < FB_LEN; i++) {
draw_mask(i, pattern[p], color);
p++;
if (p >= pattern_len) {
p = 0;
}
}
}
void fb_invert()
{
for (fbsize_t i = 0; i < FB_LEN; i++) {
fb[i] ^= 0xFF;
}
}
void fb_px(fbpos_t x, fbpos_t y, fbcolor_t color)
{
if (x >= FBW || y >= FBH || x < 0 || y < 0) { return; }
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
const fbsize_t cell = (fbsize_t) x + (fbsize_t) row * FBW;
draw_mask(cell, 1 << rowrem, color);
}
uint8_t fb_getpx(fbpos_t x, fbpos_t y)
{
if (x >= FBW || y >= FBH || x < 0 || y < 0) { return 0; }
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
const fbsize_t cell = (fbsize_t) x + (fbsize_t) row * FBW;
if (fb[cell] & (1 << rowrem)) {
return 0xFF;
} else {
return 0x00;
}
}
void fb_hline(fbpos_t x, fbpos_t y, fbpos_t w, fbcolor_t color)
{
if (x >= FBW || y >= FBH || x < -w || y < 0) { return; }
w = MIN(FBW - x, w);
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
fbsize_t cell = (fbsize_t) x + (fbsize_t) row * FBW;
for (uint8_t i = 0; i < w; i++) {
draw_mask(cell, 1 << rowrem, color);
cell++;
}
}
void fb_vline(fbpos_t x, fbpos_t y, fbpos_t h, fbcolor_t color)
{
if (x >= FBW || y >= FBH || x < 0 || y < -h) { return; }
h = MIN(FBH - y - 1, h);
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
uint16_t cell = (uint16_t) x + (uint16_t) row * FBW;
if (rowrem + h < 8) {
// all within one cell
const uint8_t mask = (0xFF << rowrem) & (0xFF >> (8 - h - rowrem));
draw_mask(cell, mask, color);
return;
} else {
// First
draw_mask(cell, 0xFF << rowrem, color);
h -= (rowrem == 0 ? 8 : (8 - rowrem));
const fbpos_t whole_cells = h / 8;
if (whole_cells > 0) {
h -= whole_cells * 8;
for (fbpos_t i = 0; i < whole_cells; i++) {
cell += FBW;
draw_mask(cell, 0xFF, color);
}
}
// last
cell += FBW;
draw_mask(cell, 0xFF >> (8 - h), color);
}
}
void fb_rect(fbpos_t x, fbpos_t y, fbpos_t w, fbpos_t h, fbcolor_t color)
{
if (x >= FBW || y >= FBH || x < -w || y < -h) { return; }
w = MIN(FBW - x, w);
h = MIN(FBH - y, h);
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
fbsize_t cell = (fbsize_t) x + (fbsize_t) row * FBW;
if (w == 1 && h == 1) {
fb_px(x, y, color);
} else if (w == 1) {
fb_vline(x, y, h, color);
} else if (h == 1) {
fb_hline(x, y, w, color);
} else if (rowrem + h <= 8) {
// all within one cell
uint8_t mask = (0xFF << rowrem) & (0xFF >> (8 - h - rowrem));
for (fbpos_t i = 0; i < w; i++) {
draw_mask(cell + i, mask, color);
}
return;
} else {
// First
uint8_t mask = (0xFF << rowrem);
for (fbpos_t i = 0; i < w; i++) {
draw_mask(cell + i, mask, color);
}
h -= 8 - rowrem;
const fbpos_t whole_cells = h / 8;
if (whole_cells > 0) {
h -= whole_cells * 8;
for (fbpos_t j = 0; j < whole_cells; j++) {
cell += FBW;
for (fbpos_t i = 0; i < w; i++) {
draw_mask(cell + i, 0xFF, color);
}
}
}
cell += FBW;
// last
mask = (0xFF >> (8 - h));
for (fbpos_t i = 0; i < w; i++) {
draw_mask(cell + i, mask, color);
}
}
}
void fb_frame(fbpos_t x, fbpos_t y, fbpos_t w, fbpos_t h, fbpos_t thickness, fbcolor_t color)
{
if (thickness == 0) {
return;
} else if (thickness == 1) {
fb_hline(x, y, w, color);
fb_vline(x, y, h, color);
fb_hline(x, y + h - 1, w, color);
fb_vline(x + w - 1, y, h, color);
} else {
fb_rect(x, y, w, thickness, color);
fb_rect(x, y + h - thickness, w, thickness, color);
fb_rect(x, y + thickness, thickness, h - 2 * thickness, color);
fb_rect(x + w - thickness, y + thickness, thickness, h - 2 * thickness, color);
}
}
// setCircle draws a circle centered around x0,y0 with a defined
// radius. The circle can be black or white. And have a line
// thickness ranging from 1 to the radius of the circle.
// This function was grabbed from the SparkFun ColorLCDShield
// library.
void fb_circle(fbpos_t x0, fbpos_t y0, fbpos_t radius, uint8_t thickness, fbcolor_t color)
{
for (uint8_t r = 0; r < thickness; r++) {
int8_t f = 1 - radius;
fbpos_t ddF_x = 0;
int8_t ddF_y = -2 * radius;
fbpos_t x = 0;
fbpos_t y = radius;
fb_px(x0, y0 + radius, color);
fb_px(x0 + radius, y0, color);
if (y0 >= radius) {
fb_px(x0, y0 - radius, color);
}
if (x0 >= radius) {
fb_px(x0 - radius, y0, color);
}
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x + 1;
fb_px(x0 + x, y0 + y, color);
fb_px(x0 - x, y0 + y, color);
fb_px(x0 + x, y0 - y, color);
fb_px(x0 - x, y0 - y, color);
fb_px(x0 + y, y0 + x, color);
fb_px(x0 - y, y0 + x, color);
fb_px(x0 + y, y0 - x, color);
fb_px(x0 - y, y0 - x, color);
}
radius--;
}
}
#if IS_AVR
void fb_bitmap_ex_P(fbpos_t x, fbpos_t y, fbpos_t w, fbpos_t h, const uint8_t *map, fbcolor_t color)
#else
void fb_bitmap_ex(fbpos_t x, fbpos_t y, fbpos_t w, fbpos_t h, const uint8_t *map, fbcolor_t color)
#endif
{
if (x >= FBW || y >= FBH || x < -w || h < -h) { return; }
const fbpos_t w0 = w;
w = MIN(FBW - x - 1, w);
h = MIN(FBH - y - 1, h);
const fbpos_t row = y / 8;
const fbpos_t rowrem = y % 8;
fbsize_t cell = (fbsize_t) x + (fbsize_t) row * FBW;
if (rowrem + h <= 8) {
for (fbpos_t i = 0; i < w; i++) {
// all within one cell
const uint8_t mask = (pgm_read_byte(&map[i]) & (0xFF >> (8 - h))) << rowrem;
draw_mask(cell + i, mask, color);
}
return;
} else {
fbsize_t mapc0 = 0;
// Draw the bitmap slice-by-slice based on how rows of the bitmap intersect with rows of the canvas.
// This could be optimized to walk each row of the canvas only once, but the code would get bigger.
while (h > 0) {
for (fbpos_t i = 0; i < w; i++) {
const uint8_t mask = (pgm_read_byte(&map[i + mapc0]) & (0xFF >> rowrem)) << rowrem;
draw_mask(cell + i, mask, color);
}
cell += FBW;
if (rowrem != 0) {
for (fbpos_t i = 0; i < w; i++) {
const uint8_t mask = (pgm_read_byte(&map[i + mapc0]) & (0xFF << (8 - rowrem))) >> (8 - rowrem);
draw_mask(cell + i, mask, color);
}
}
if (h > 8) {
h -= 8;
} else {
break;
}
mapc0 += w0;
}
}
}