57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#include "pico_graphics.hpp"
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namespace pimoroni {
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PicoGraphics_Pen1BitY::PicoGraphics_Pen1BitY(uint16_t width, uint16_t height, void *frame_buffer)
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: PicoGraphics(width, height, frame_buffer) {
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this->pen_type = PEN_1BIT;
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if(this->frame_buffer == nullptr) {
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this->frame_buffer = (void *)(new uint8_t[buffer_size(width, height)]);
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}
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}
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void PicoGraphics_Pen1BitY::set_pen(uint c) {
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color = c;
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}
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void PicoGraphics_Pen1BitY::set_pen(uint8_t r, uint8_t g, uint8_t b) {
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color = std::max(r, std::max(g, b)) >> 4;
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}
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void PicoGraphics_Pen1BitY::set_pixel(const Point &p) {
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// pointer to byte in framebuffer that contains this pixel
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uint8_t *buf = (uint8_t *)frame_buffer;
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uint8_t *f = &buf[(p.y / 8) + (p.x * bounds.h / 8)];
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uint bo = 7 - (p.y & 0b111);
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uint8_t _dc = 0;
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if(color == 0) {
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_dc = 0;
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} else if (color == 15) {
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_dc = 1;
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} else {
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uint8_t _dmv = dither16_pattern[(p.x & 0b11) | ((p.y & 0b11) << 2)];
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_dc = color > _dmv ? 1 : 0;
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}
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// forceably clear the bit
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*f &= ~(1U << bo);
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// set pixel
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*f |= (_dc << bo);
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}
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void PicoGraphics_Pen1BitY::set_pixel_span(const Point &p, uint l) {
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Point lp = p;
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if(p.x + (int)l >= bounds.w) {
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l = bounds.w - p.x;
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}
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while(l--) {
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set_pixel(lp);
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lp.x++;
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}
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}
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} |