123 lines
4.6 KiB
C++
123 lines
4.6 KiB
C++
#include "pico_graphics.hpp"
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#include <string.h>
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namespace pimoroni {
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PicoGraphics_PenRGB332::PicoGraphics_PenRGB332(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_RGB332;
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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_PenRGB332::set_pen(uint c) {
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color = c;
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}
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void PicoGraphics_PenRGB332::set_pen(uint8_t r, uint8_t g, uint8_t b) {
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color = rgb_to_rgb332(r, g, b);
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}
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int PicoGraphics_PenRGB332::create_pen(uint8_t r, uint8_t g, uint8_t b) {
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return rgb_to_rgb332(r, g, b);
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}
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void PicoGraphics_PenRGB332::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_PenRGB332::set_pixel_span(const Point &p, uint l) {
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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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buf = &buf[p.y * bounds.w + p.x];
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while(l--) {
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*buf++ = color;
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}
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}
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void PicoGraphics_PenRGB332::set_pixel_dither(const Point &p, const RGB &c) {
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if(!bounds.contains(p)) return;
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uint8_t _dmv = dither16_pattern[(p.x & 0b11) | ((p.y & 0b11) << 2)];
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uint8_t red = c.r & 0b11000000; // Two bits red
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uint8_t red_r = c.r & 0b111111; // Remaining six bits red
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red_r >>= 2; // Discard down to four bit
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uint8_t grn = (c.g & 0b11000000) >> 3; // Two bits green
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uint8_t grn_r = c.g & 0b111111; // Remaining six bits green
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grn_r >>= 2; // Discard down to four bit
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uint8_t blu = (c.b & 0b10000000) >> 6; // One bit blue
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uint8_t blu_r = c.b & 0b1111111; // Remaining seven bits green
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blu_r >>= 3; // Discard down to four bit
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color = red | grn | blu;
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if(red_r > _dmv) color |= 0b00100000;
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if(grn_r > _dmv) color |= 0b00000100;
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if(blu_r > _dmv) color |= 0b00000001;
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set_pixel(p);
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}
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void PicoGraphics_PenRGB332::set_pixel_dither(const Point &p, const RGB565 &c) {
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if(!bounds.contains(p)) return;
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RGB565 cs = __builtin_bswap16(c);
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uint8_t _dmv = dither16_pattern[(p.x & 0b11) | ((p.y & 0b11) << 2)];
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// RRRRRGGGGGGBBBBB
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uint8_t red = (cs & 0b1100000000000000) >> 8; // Two bits grn
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uint8_t red_r = (cs & 0b0011100000000000) >> 10; // Four bits cmp
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uint8_t grn = (cs & 0b0000011000000000) >> 6; // Two bit grn
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uint8_t grn_r = (cs & 0b0000000111100000) >> 5; // Four bit cmp
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uint8_t blu = (cs & 0b0000000000010000) >> 3; // Two bit blu
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uint8_t blu_r = (cs & 0b0000000000001111); // Four bit cmp
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color = red | grn | blu;
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// RRRGGGBB
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if(red_r > _dmv) color |= 0b00100000;
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if(grn_r > _dmv) color |= 0b00000100;
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if(blu_r > _dmv) color |= 0b00000001;
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set_pixel(p);
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}
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void PicoGraphics_PenRGB332::scanline_convert(PenType type, conversion_callback_func callback) {
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if(type == PEN_RGB565) {
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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 two per-row temporary buffers, as the callback may transfer by DMA
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// while we're preparing the next row
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uint16_t row_buf[2][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[y & 1][x] = rgb332_to_rgb565_lut[*src];
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src++;
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}
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// Callback to the driver with the row data
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callback(row_buf[y & 1], bounds.w * sizeof(RGB565));
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}
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}
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}
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void PicoGraphics_PenRGB332::sprite(void* data, const Point &sprite, const Point &dest, const int scale, const int transparent) {
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//int sprite_x = (sprite & 0x0f) << 3;
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//int sprite_y = (sprite & 0xf0) >> 1;
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Point s {
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sprite.x << 3,
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sprite.y << 3
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};
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RGB332 *ptr = (RGB332 *)data;
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Point o = {0, 0};
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for(o.y = 0; o.y < 8 * scale; o.y++) {
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Point so = {
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0,
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o.y / scale
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};
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for(o.x = 0; o.x < 8 * scale; o.x++) {
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so.x = o.x / scale;
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color = ptr[(s.y + so.y) * 128 + (s.x + so.x)];
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if(color != transparent) pixel(dest + o);
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}
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}
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}
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}
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