kopia lustrzana https://github.com/pimoroni/pimoroni-pico
100 wiersze
3.4 KiB
C++
100 wiersze
3.4 KiB
C++
#include "pico_graphics.hpp"
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namespace pimoroni {
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PicoGraphics_PenInky7::PicoGraphics_PenInky7(uint16_t width, uint16_t height, IDirectDisplayDriver<uint8_t> &direct_display_driver)
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: PicoGraphics(width, height, nullptr),
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driver(direct_display_driver) {
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this->pen_type = PEN_INKY7;
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}
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void PicoGraphics_PenInky7::set_pen(uint c) {
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color = c;
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}
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void PicoGraphics_PenInky7::set_pen(uint8_t r, uint8_t g, uint8_t b) {
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color = RGB(r, g, b).to_rgb888() | 0x010101;
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}
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int PicoGraphics_PenInky7::create_pen(uint8_t r, uint8_t g, uint8_t b) {
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return RGB(r, g, b).to_rgb888() | 0x010101;
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}
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int PicoGraphics_PenInky7::create_pen_hsv(float h, float s, float v) {
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return RGB::from_hsv(h, s, v).to_rgb888();
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}
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void PicoGraphics_PenInky7::set_pixel(const Point &p) {
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if ((color & 0x010101) == 0x010101) {
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set_pixel_dither(p, RGB(color));
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} else {
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driver.write_pixel(p, color & 0x07);
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}
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}
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void PicoGraphics_PenInky7::set_pixel_span(const Point &p, uint l) {
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driver.write_pixel_span(p, l, color);
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}
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void PicoGraphics_PenInky7::get_dither_candidates(const RGB &col, const RGB *palette, size_t len, std::array<uint8_t, 16> &candidates) {
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RGB error;
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for(size_t i = 0; i < candidates.size(); i++) {
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candidates[i] = (col + error).closest(palette, len);
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error += (col - palette[candidates[i]]);
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}
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// sort by a rough approximation of luminance, this ensures that neighbouring
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// pixels in the dither matrix are at extreme opposites of luminence
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// giving a more balanced output
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std::sort(candidates.begin(), candidates.end(), [palette](int a, int b) {
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return palette[a].luminance() > palette[b].luminance();
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});
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}
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void PicoGraphics_PenInky7::set_pixel_dither(const Point &p, const RGB &c) {
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if(!bounds.contains(p)) return;
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if(!cache_built) {
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for(uint i = 0; i < 512; i++) {
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uint r = (i & 0x1c0) >> 1;
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uint g = (i & 0x38) << 2;
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uint b = (i & 0x7) << 5;
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RGB cache_col(
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r | (r >> 3) | (r >> 6),
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g | (g >> 3) | (g >> 6),
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b | (b >> 3) | (b >> 6)
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);
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get_dither_candidates(cache_col, palette, palette_size, candidate_cache[i]);
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}
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cache_built = true;
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}
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uint cache_key = ((c.r & 0xE0) << 1) | ((c.g & 0xE0) >> 2) | ((c.b & 0xE0) >> 5);
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//get_dither_candidates(c, palette, 256, candidates);
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// find the pattern coordinate offset
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uint pattern_index = (p.x & 0b11) | ((p.y & 0b11) << 2);
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// set the pixel
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//color = candidates[pattern[pattern_index]];
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color = candidate_cache[cache_key][dither16_pattern[pattern_index]];
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set_pixel(p);
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}
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void PicoGraphics_PenInky7::frame_convert(PenType type, conversion_callback_func callback) {
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if(type == PEN_INKY7) {
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uint byte_count = bounds.w/2;
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uint8_t buffer[bounds.w];
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for(int32_t r = 0; r < bounds.h; r++)
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{
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driver.read_pixel_span(Point(0, r), bounds.w, buffer);
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// for(int y=0; y < 800; y++)
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// buffer[y] = rand() % 7;
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// convert byte storage to nibble storage
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uint8_t *pDst = buffer;
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uint8_t *pSrc = buffer;
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for(uint c = 0; c < byte_count; c++)
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{
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uint8_t nibble = ((*pSrc++) << 4);
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nibble |= ((*pSrc++) & 0xf);
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*pDst++ = nibble;
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}
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callback(buffer, byte_count);
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}
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}
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}
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} |