223 lines
6.3 KiB
C++
223 lines
6.3 KiB
C++
#include "ui_bmpview.hpp"
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#include "usb_serial_asyncmsg.hpp"
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#include "portapack.hpp"
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bool BMPViewer::load_bmp(const std::filesystem::path& file) {
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if (!bmp.open(file, true)) return false;
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// calc default zoom level to fit screen, and min / max zoom too
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auto rect = screen_rect();
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auto d_height = rect.height();
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auto d_width = rect.width();
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auto b_width = bmp.get_width();
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auto b_height = bmp.get_real_height();
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// aspects
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// if image is smaller then our vp
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auto x_w = d_width / b_width;
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auto x_h = d_height / b_height;
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if (x_w < 1 && x_h < 1) {
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// not zoom in, but zoom out
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x_w = b_width / d_width;
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x_h = b_height / d_height;
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x_w = (127 < x_w) ? 127 : x_w;
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x_h = (127 < x_h) ? 127 : x_h;
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zoom_fit = (x_h > x_w) ? -1 * x_h : -1 * x_w;
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} else {
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x_w = (127 < x_w) ? 127 : x_w;
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x_h = (127 < x_h) ? 127 : x_h;
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zoom_fit = (x_h > x_w) ? x_h : x_w;
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}
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if (zoom_fit > max_zoom) zoom_fit = max_zoom;
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min_zoom = zoom_fit - 3;
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reset_pos();
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return true;
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}
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bool BMPViewer::move_pos(int32_t delta_x, int32_t delta_y) {
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if (!bmp.is_loaded()) return false;
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auto rect = screen_rect();
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auto d_height = rect.height();
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auto d_width = rect.width();
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auto ocx = cx; // save old pos
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auto ocy = cy;
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// top left protection
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if (delta_x < 0 && cx <= (uint32_t)(-1 * delta_x))
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cx = 0;
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else
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cx += delta_x;
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if (delta_y < 0 && cy <= (uint32_t)(-1 * delta_y))
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cy = 0;
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else
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cy += delta_y;
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// right bottom protection
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float zt = zoom < 0 ? -1.0f / (float)zoom : (float)zoom;
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if (zt == 0) zt = 1;
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if (cy + (uint32_t)(d_height / zt) > bmp.get_real_height()) {
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cy = (bmp.get_real_height() < (uint32_t)(d_height / zt)) ? 0 : bmp.get_real_height() - (uint32_t)(d_height / zt);
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}
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if (cx + (uint32_t)(d_width / zt) > bmp.get_width()) {
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cx = (bmp.get_width() < (uint32_t)(d_width / zt)) ? 0 : bmp.get_width() - (uint32_t)(d_width / zt);
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}
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bool ret = !(cx == ocx && ocy == cy); // was any change?
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if (ret) set_dirty();
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return ret;
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}
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void BMPViewer::set_zoom(int8_t new_zoom) {
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if (!bmp.is_loaded()) return;
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if (new_zoom > max_zoom) new_zoom = max_zoom;
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if (new_zoom < min_zoom) new_zoom = min_zoom;
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if (new_zoom == 0) new_zoom = 1;
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if (new_zoom == -1) new_zoom = 1;
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zoom = new_zoom;
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auto rect = screen_rect();
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auto d_height = rect.height();
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auto d_width = rect.width();
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if (zoom < 0) {
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mvx = d_width / 3 * (-1.0 * zoom);
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mvy = d_height / 3 * (-1.0 * zoom);
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} else {
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mvx = d_width / zoom / 3;
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mvy = d_height / zoom / 3;
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}
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move_pos(0, 0); // fix based on zoom, without real move (if not edge case)
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set_dirty();
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}
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// reads a lint from the bmp's bx, by coordinate to the line that's size is cnt. according to zoom
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void BMPViewer::get_line(ui::Color* line, uint32_t bx, uint32_t by, uint32_t cnt) {
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if (!bmp.is_loaded()) return;
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uint32_t last_targetx = 65534;
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for (uint32_t x = 0; x < cnt; x++) {
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uint32_t targetx = (zoom < 0) ? bx + x * -1 * zoom : bx + x / zoom; // on zoom out could probably avg the pixels, or apply some smoothing, but this is way faster.
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if (last_targetx == targetx) {
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line[x] = line[x - 1];
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continue;
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}
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last_targetx = targetx;
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if (!bmp.seek(targetx, by)) {
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line[x] = Color::white(); // can't seek there
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} else {
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bmp.read_next_px(line[x], false);
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}
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}
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}
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void BMPViewer::paint(Painter& painter) {
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if (!bmp.is_loaded()) {
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painter.draw_string({48, 24}, ui::Styles::white, "Can't load BMP");
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return;
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}
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// get where i can paint
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auto rect = screen_rect();
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auto d_height = rect.height();
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auto d_width = rect.width();
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uint32_t by = cy; // we start to read from there
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uint32_t last_by = 65534;
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ui::Color* line = new ui::Color[d_width];
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for (int32_t y = 0; y < d_height; y++) {
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by = cy + ((zoom < 0) ? y * -1 * zoom : y / (int32_t)zoom);
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if (by != last_by) get_line(line, cx, by, d_width);
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last_by = by;
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portapack::display.draw_pixels({rect.left(), rect.top() + y, d_width, 1}, line, d_width);
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}
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delete line;
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}
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int8_t BMPViewer::get_zoom() {
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return zoom;
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}
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BMPViewer::BMPViewer(Rect parent_rect)
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: Widget{parent_rect} {
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set_focusable(true);
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}
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BMPViewer::BMPViewer(Rect parent_rect, const std::filesystem::path& file)
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: Widget{parent_rect} {
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set_focusable(true);
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load_bmp(file);
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}
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void BMPViewer::on_focus() {
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set_highlighted(true);
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}
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void BMPViewer::on_blur() {
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set_dirty();
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}
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void BMPViewer::reset_pos() {
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if (!bmp.is_loaded()) return;
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cx = 0;
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cy = 0;
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set_zoom(zoom_fit);
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set_dirty();
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}
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bool BMPViewer::on_key(const KeyEvent key) {
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if (!bmp.is_loaded()) return false;
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if (key == KeyEvent::Up) {
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return move_pos(0, -1 * mvy);
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}
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if (key == KeyEvent::Down) {
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return move_pos(0, mvy);
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}
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if (key == KeyEvent::Left) {
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return move_pos(-1 * mvx, 0);
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}
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if (key == KeyEvent::Right) {
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return move_pos(mvx, 0);
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}
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if (key == KeyEvent::Select) {
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if (!enter_pass) {
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reset_pos();
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return true;
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}
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}
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return false;
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}
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bool BMPViewer::on_encoder(EncoderEvent delta) {
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if (!bmp.is_loaded()) return false;
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if (delta > 0) {
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set_zoom(zoom + delta); // 0 handled in set_zoom
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return true;
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}
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if (delta < 0) {
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if (zoom == 1) // not 0, but -1
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set_zoom(-2);
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else
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set_zoom(zoom + delta); // decrease
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return true;
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}
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return false;
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}
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// sets if the enter key should be passed to parent or handled. true = pass it, false = handle as reset pos+zoom
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void BMPViewer::set_enter_pass(bool pass) {
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enter_pass = pass;
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}
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bool BMPViewer::get_enter_pass() {
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return enter_pass;
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}
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bool BMPViewer::on_keyboard(const KeyboardEvent event) {
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if (!bmp.is_loaded()) return false;
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if (event == '+') {
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set_zoom(zoom + 1);
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return true;
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}
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if (event == '-') {
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if (zoom == 1) // not 0, but -1
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set_zoom(-2);
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else
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set_zoom(zoom - 1); // decrease
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return true;
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}
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return false;
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} |