kopia lustrzana https://github.com/pimoroni/pimoroni-pico
76 wiersze
2.7 KiB
C++
76 wiersze
2.7 KiB
C++
#include "pico_graphics.hpp"
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namespace pimoroni {
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PicoGraphics_PenRGB888::PicoGraphics_PenRGB888(uint16_t width, uint16_t height, void *frame_buffer, uint16_t layers)
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: PicoGraphics(width, height, layers, frame_buffer) {
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this->pen_type = PEN_RGB888;
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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_PenRGB888::set_pen(uint c) {
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color = c;
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}
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void PicoGraphics_PenRGB888::set_pen(uint8_t r, uint8_t g, uint8_t b) {
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src_color = {r, g, b};
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color = src_color.to_rgb888();
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}
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int PicoGraphics_PenRGB888::create_pen(uint8_t r, uint8_t g, uint8_t b) {
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return RGB(r, g, b).to_rgb888();
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}
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int PicoGraphics_PenRGB888::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_PenRGB888::set_pixel(const Point &p) {
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uint32_t *buf = (uint32_t *)frame_buffer;
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buf += this->layer_offset;
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buf[p.y * bounds.w + p.x] = color;
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}
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void PicoGraphics_PenRGB888::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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uint32_t *buf = (uint32_t *)frame_buffer;
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buf += this->layer_offset;
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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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bool PicoGraphics_PenRGB888::render_tile(const Tile *tile) {
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// Unpack our pen colour
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uint32_t sr = (color >> 16) & 0xff;
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uint32_t sg = (color >> 8) & 0xff;
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uint32_t sb = (color >> 0) & 0xff;
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for(int y = 0; y < tile->h; y++) {
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uint8_t *p_alpha = &tile->data[(y * tile->stride)];
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uint32_t *p_dest = &((uint32_t *)frame_buffer)[tile->x + ((tile->y + y) * bounds.w)];
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for(int x = 0; x < tile->w; x++) {
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uint32_t dest = *p_dest;
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uint8_t alpha = *p_alpha;
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// TODO: Alpha blending
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if(alpha == 255) {
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*p_dest = color;
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}else if(alpha == 0) {
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} else {
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// blend the pixel
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uint32_t dr = (dest >> 16) & 0xff;
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uint32_t dg = (dest >> 8) & 0xff;
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uint32_t db = (dest >> 0) & 0xff;
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uint8_t r = ((sr * alpha) + (dr * (255 - alpha))) >> 8;
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uint8_t g = ((sg * alpha) + (dg * (255 - alpha))) >> 8;
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uint8_t b = ((sb * alpha) + (db * (255 - alpha))) >> 8;
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*p_dest = (r << 16) | (g << 8) | b;
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}
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p_dest++;
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p_alpha++;
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}
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}
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return true;
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}
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} |