kopia lustrzana https://github.com/pimoroni/pimoroni-pico
111 wiersze
3.9 KiB
C++
111 wiersze
3.9 KiB
C++
#include "pico_graphics.hpp"
|
|
|
|
namespace pimoroni {
|
|
|
|
PicoGraphics_PenDV_P5::PicoGraphics_PenDV_P5(uint16_t width, uint16_t height, IPaletteDisplayDriver &palette_display_driver)
|
|
: PicoGraphics(width, height, nullptr),
|
|
driver(palette_display_driver)
|
|
{
|
|
this->pen_type = PEN_DV_P5;
|
|
for(auto i = 0u; i < palette_size; i++) {
|
|
palette[i] = {
|
|
uint8_t(i << 3),
|
|
uint8_t(i << 3),
|
|
uint8_t(i << 3)
|
|
};
|
|
driver.set_palette_colour(i, palette[i].to_rgb888());
|
|
used[i] = false;
|
|
}
|
|
cache_built = false;
|
|
}
|
|
void PicoGraphics_PenDV_P5::set_pen(uint c) {
|
|
color = c & 0x1f;
|
|
}
|
|
void PicoGraphics_PenDV_P5::set_pen(uint8_t r, uint8_t g, uint8_t b) {
|
|
int pen = RGB(r, g, b).closest(palette, palette_size);
|
|
if(pen != -1) color = pen;
|
|
}
|
|
int PicoGraphics_PenDV_P5::update_pen(uint8_t i, uint8_t r, uint8_t g, uint8_t b) {
|
|
i &= 0x1f;
|
|
used[i] = true;
|
|
palette[i] = {r, g, b};
|
|
cache_built = false;
|
|
driver.set_palette_colour(i, palette[i].to_rgb888());
|
|
return i;
|
|
}
|
|
int PicoGraphics_PenDV_P5::create_pen(uint8_t r, uint8_t g, uint8_t b) {
|
|
// Create a colour and place it in the palette if there's space
|
|
for(auto i = 0u; i < palette_size; i++) {
|
|
if(!used[i]) {
|
|
palette[i] = {r, g, b};
|
|
used[i] = true;
|
|
cache_built = false;
|
|
driver.set_palette_colour(i, palette[i].to_rgb888());
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
int PicoGraphics_PenDV_P5::create_pen_hsv(float h, float s, float v) {
|
|
RGB p = RGB::from_hsv(h, s, v);
|
|
return create_pen(p.r, p.g, p.b);
|
|
}
|
|
int PicoGraphics_PenDV_P5::reset_pen(uint8_t i) {
|
|
palette[i] = {0, 0, 0};
|
|
used[i] = false;
|
|
cache_built = false;
|
|
return i;
|
|
}
|
|
void PicoGraphics_PenDV_P5::set_pixel(const Point &p) {
|
|
driver.write_palette_pixel(p, color << 2);
|
|
}
|
|
|
|
void PicoGraphics_PenDV_P5::set_pixel_span(const Point &p, uint l) {
|
|
driver.write_palette_pixel_span(p, l, color << 2);
|
|
}
|
|
|
|
void PicoGraphics_PenDV_P5::get_dither_candidates(const RGB &col, const RGB *palette, size_t len, std::array<uint8_t, 16> &candidates) {
|
|
RGB error;
|
|
for(size_t i = 0; i < candidates.size(); i++) {
|
|
candidates[i] = (col + error).closest(palette, len);
|
|
error += (col - palette[candidates[i]]);
|
|
}
|
|
|
|
// sort by a rough approximation of luminance, this ensures that neighbouring
|
|
// pixels in the dither matrix are at extreme opposites of luminence
|
|
// giving a more balanced output
|
|
std::sort(candidates.begin(), candidates.end(), [palette](int a, int b) {
|
|
return palette[a].luminance() > palette[b].luminance();
|
|
});
|
|
}
|
|
|
|
void PicoGraphics_PenDV_P5::set_pixel_dither(const Point &p, const RGB &c) {
|
|
if(!bounds.contains(p)) return;
|
|
|
|
uint used_palette_entries = 0;
|
|
for(auto i = 0u; i < palette_size; i++) {
|
|
if(!used[i]) break;
|
|
used_palette_entries++;
|
|
}
|
|
|
|
if(!cache_built) {
|
|
for(uint i = 0; i < 512; i++) {
|
|
RGB cache_col((i & 0x1C0) >> 1, (i & 0x38) << 2, (i & 0x7) << 5);
|
|
get_dither_candidates(cache_col, palette, used_palette_entries, candidate_cache[i]);
|
|
}
|
|
cache_built = true;
|
|
}
|
|
|
|
uint cache_key = ((c.r & 0xE0) << 1) | ((c.g & 0xE0) >> 2) | ((c.b & 0xE0) >> 5);
|
|
//get_dither_candidates(c, palette, 256, candidates);
|
|
|
|
// find the pattern coordinate offset
|
|
uint pattern_index = (p.x & 0b11) | ((p.y & 0b11) << 2);
|
|
|
|
// set the pixel
|
|
//color = candidates[pattern[pattern_index]];
|
|
color = candidate_cache[cache_key][dither16_pattern[pattern_index]];
|
|
set_pixel(p);
|
|
}
|
|
}
|