kopia lustrzana https://github.com/pimoroni/pimoroni-pico
69 wiersze
2.3 KiB
C++
69 wiersze
2.3 KiB
C++
#include "pico_graphics.hpp"
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namespace pimoroni {
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PicoGraphics_PenP8::PicoGraphics_PenP8(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_P8;
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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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for(auto i = 0u; i < 256; i++) {
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palette[i] = {0, 0, 0};
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used[i] = false;
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}
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}
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void PicoGraphics_PenP8::set_pen(uint c) {
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color = c;
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}
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void PicoGraphics_PenP8::set_pen(uint8_t r, uint8_t g, uint8_t b) {
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int pen = RGB(r, g, b).closest(palette, 16);
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if(pen != -1) color = pen;
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}
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int PicoGraphics_PenP8::update_pen(uint8_t i, uint8_t r, uint8_t g, uint8_t b) {
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i &= 0xff;
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palette[i] = {r, g, b};
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return i;
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}
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int PicoGraphics_PenP8::create_pen(uint8_t r, uint8_t g, uint8_t b) {
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// Create a colour and place it in the palette if there's space
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for(auto i = 0u; i < 256u; i++) {
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if(!used[i]) {
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palette[i] = {r, g, b};
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used[i] = true;
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return i;
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}
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}
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return -1;
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}
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int PicoGraphics_PenP8::reset_pen(uint8_t i) {
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palette[i] = {0, 0, 0};
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used[i] = false;
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return i;
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}
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void PicoGraphics_PenP8::set_pixel(const Point &p) {
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uint8_t *buf = (uint8_t *)frame_buffer;
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buf[p.y * bounds.w + p.x] = color;
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}
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void PicoGraphics_PenP8::scanline_convert(PenType type, conversion_callback_func callback) {
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if(type == PEN_RGB565) {
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// Cache the RGB888 palette as RGB565
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RGB565 cache[256];
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for(auto i = 0u; i < 256; i++) {
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cache[i] = palette[i].to_rgb565();
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}
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// Treat our void* frame_buffer as uint8_t
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uint8_t *src = (uint8_t *)frame_buffer;
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// Allocate a per-row temporary buffer
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uint16_t row_buf[bounds.w];
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for(auto y = 0; y < bounds.h; y++) {
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for(auto x = 0; x < bounds.w; x++) {
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row_buf[x] = cache[src[bounds.w * y + x]];
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}
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// Callback to the driver with the row data
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callback(row_buf, bounds.w * sizeof(uint8_t));
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}
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}
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}
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} |