105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
#include "pico_graphics.hpp"
|
|
|
|
namespace pimoroni {
|
|
PicoGraphics_PenInky7::PicoGraphics_PenInky7(uint16_t width, uint16_t height, IDirectDisplayDriver<uint8_t> &direct_display_driver)
|
|
: PicoGraphics(width, height, nullptr),
|
|
driver(direct_display_driver) {
|
|
this->pen_type = PEN_INKY7;
|
|
}
|
|
void PicoGraphics_PenInky7::set_pen(uint c) {
|
|
color = c;
|
|
}
|
|
void PicoGraphics_PenInky7::set_pen(uint8_t r, uint8_t g, uint8_t b) {
|
|
color = RGB(r, g, b).to_rgb888() | 0x7f000000;
|
|
}
|
|
int PicoGraphics_PenInky7::create_pen(uint8_t r, uint8_t g, uint8_t b) {
|
|
return RGB(r, g, b).to_rgb888() | 0x7f000000;
|
|
}
|
|
int PicoGraphics_PenInky7::create_pen_hsv(float h, float s, float v) {
|
|
return RGB::from_hsv(h, s, v).to_rgb888() | 0x7f000000;
|
|
}
|
|
void PicoGraphics_PenInky7::set_pixel(const Point &p) {
|
|
if ((color & 0x7f000000) == 0x7f000000) {
|
|
set_pixel_dither(p, RGB(color));
|
|
} else {
|
|
driver.write_pixel(p, color & 0x07);
|
|
}
|
|
}
|
|
void PicoGraphics_PenInky7::set_pixel_span(const Point &p, uint l) {
|
|
if ((color & 0x7f000000) == 0x7f000000) {
|
|
for(auto x = 0u; x < l; x++) {
|
|
set_pixel_dither(p + Point(x, 0), RGB(color));
|
|
}
|
|
return;
|
|
}
|
|
driver.write_pixel_span(p, l, color);
|
|
}
|
|
void PicoGraphics_PenInky7::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_PenInky7::set_pixel_dither(const Point &p, const RGB &c) {
|
|
if(!bounds.contains(p)) return;
|
|
|
|
if(!cache_built) {
|
|
for(uint i = 0; i < 512; i++) {
|
|
uint r = (i & 0x1c0) >> 1;
|
|
uint g = (i & 0x38) << 2;
|
|
uint b = (i & 0x7) << 5;
|
|
RGB cache_col(
|
|
r | (r >> 3) | (r >> 6),
|
|
g | (g >> 3) | (g >> 6),
|
|
b | (b >> 3) | (b >> 6)
|
|
);
|
|
get_dither_candidates(cache_col, palette, palette_size, 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]];
|
|
driver.write_pixel(p, candidate_cache[cache_key][dither16_pattern[pattern_index]] & 0x07);
|
|
}
|
|
void PicoGraphics_PenInky7::frame_convert(PenType type, conversion_callback_func callback) {
|
|
if(type == PEN_INKY7) {
|
|
uint byte_count = bounds.w/2;
|
|
uint8_t buffer[bounds.w];
|
|
|
|
for(int32_t r = 0; r < bounds.h; r++)
|
|
{
|
|
driver.read_pixel_span(Point(0, r), bounds.w, buffer);
|
|
// for(int y=0; y < 800; y++)
|
|
// buffer[y] = rand() % 7;
|
|
|
|
// convert byte storage to nibble storage
|
|
uint8_t *pDst = buffer;
|
|
uint8_t *pSrc = buffer;
|
|
|
|
for(uint c = 0; c < byte_count; c++)
|
|
{
|
|
uint8_t nibble = ((*pSrc++) << 4);
|
|
nibble |= ((*pSrc++) & 0xf);
|
|
*pDst++ = nibble;
|
|
}
|
|
|
|
callback(buffer, byte_count);
|
|
}
|
|
}
|
|
}
|
|
} |