87 lines
4.1 KiB
C++
87 lines
4.1 KiB
C++
#include "pretty_poly.hpp"
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#include "alright_fonts.hpp"
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#include "pico_graphics.hpp"
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namespace pimoroni {
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// Integer point types cause compound error in transformations
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typedef float picovector_point_type;
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class PicoVector {
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private:
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PicoGraphics *graphics;
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alright_fonts::text_metrics_t text_metrics;
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const uint8_t alpha_map[4] {0, 128, 192, 255};
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public:
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PicoVector(PicoGraphics *graphics, void *mem = nullptr) : graphics(graphics) {
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pretty_poly::init(mem);
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set_options([this](const pretty_poly::tile_t &tile) -> void {
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uint8_t *tile_data = tile.data;
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if(this->graphics->supports_alpha_blend() && pretty_poly::settings::antialias != pretty_poly::NONE) {
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if (this->graphics->render_pico_vector_tile({tile.bounds.x, tile.bounds.y, tile.bounds.w, tile.bounds.h},
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tile.data,
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tile.stride,
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(uint8_t)pretty_poly::settings::antialias)) {
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return;
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}
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for(auto y = 0; y < tile.bounds.h; y++) {
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for(auto x = 0; x < tile.bounds.w; x++) {
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uint8_t alpha = *tile_data++;
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if (alpha >= 4) {
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this->graphics->set_pixel({x + tile.bounds.x, y + tile.bounds.y});
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} else if (alpha > 0) {
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alpha = alpha_map[alpha];
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this->graphics->set_pixel_alpha({x + tile.bounds.x, y + tile.bounds.y}, alpha);
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}
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}
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tile_data += tile.stride - tile.bounds.w;
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}
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} else {
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for(auto y = 0; y < tile.bounds.h; y++) {
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for(auto x = 0; x < tile.bounds.w; x++) {
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uint8_t alpha = *tile_data++;
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if (alpha) {
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this->graphics->set_pixel({x + tile.bounds.x, y + tile.bounds.y});
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}
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}
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tile_data += tile.stride - tile.bounds.w;
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}
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}
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}, graphics->supports_alpha_blend() ? pretty_poly::X4 : pretty_poly::NONE, {graphics->clip.x, graphics->clip.y, graphics->clip.w, graphics->clip.h});
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}
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void set_antialiasing(pretty_poly::antialias_t antialias) {
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set_options(pretty_poly::settings::callback, antialias, pretty_poly::settings::clip);
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}
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void set_font_size(unsigned int font_size) {
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text_metrics.set_size(font_size);
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}
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bool set_font(std::string_view font_path, unsigned int font_size) {
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bool result = text_metrics.face.load(font_path);
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set_font_size(font_size);
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return result;
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}
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void rotate(std::vector<pretty_poly::contour_t<picovector_point_type>> &contours, Point origin, float angle);
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void translate(std::vector<pretty_poly::contour_t<picovector_point_type>> &contours, Point translation);
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void rotate(pretty_poly::contour_t<picovector_point_type> &contour, Point origin, float angle);
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void translate(pretty_poly::contour_t<picovector_point_type> &contour, Point translation);
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Point text(std::string_view text, Point origin);
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Point text(std::string_view text, Point origin, float angle);
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void polygon(std::vector<pretty_poly::contour_t<picovector_point_type>> contours, Point origin = Point(0, 0), int scale=65536);
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static constexpr size_t pretty_poly_buffer_size() {
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return pretty_poly::buffer_size();
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};
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};
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} |