Custom waterfall colors (#2617)

* Custom waterfall gradient
* Installing a custom waterfall gradient via fileman
* default file for user friendly swap
Co-authored-by: gullradriel <gullradriel@no-mail.com>

firmware/application/apps/ui_fileman.cpp

@@ -419,6 +419,17 @@ void FileManBaseView::reload_current(bool reset_pagination) {
     refresh_list();
 }
 
+void FileManBaseView::copy_waterfall(std::filesystem::path path) {
+    nav_.push<ModalMessageView>(
+        "Install", " Use this gradient file\n for all waterfalls?", YESNO,
+        [this, path](bool choice) {
+            if (choice) {
+                delete_file(default_gradient_file);
+                copy_file(path, default_gradient_file);
+            }
+        });
+}
+
 const FileManBaseView::file_assoc_t& FileManBaseView::get_assoc(
     const fs::path& ext) const {
     size_t index = 0;
@@ -685,7 +696,11 @@ bool FileManagerView::handle_file_open() {
     auto ext = path.extension();
 
     if (path_iequal(txt_ext, ext)) {
-        nav_.push<TextEditorView>(path);
+        if (path_iequal(current_path, u"/" + waterfalls_dir)) {
+            copy_waterfall(path);
+        } else {
+            nav_.push<TextEditorView>(path);
+        }
         return true;
     } else if (is_cxx_capture_file(path) || path_iequal(ppl_ext, ext)) {
         // TODO: Enough memory to push?

firmware/application/apps/ui_fileman.hpp

@@ -96,6 +96,7 @@ class FileManBaseView : public View {
     void load_directory_contents(const std::filesystem::path& dir_path);
     void load_directory_contents_unordered(const std::filesystem::path& dir_path, size_t file_cnt);
     const file_assoc_t& get_assoc(const std::filesystem::path& ext) const;
+    void copy_waterfall(std::filesystem::path path);
 
     NavigationView& nav_;
 

firmware/application/apps/ui_looking_glass_app.cpp

@@ -126,7 +126,7 @@ void GlassView::reset_live_view() {
 }
 
 void GlassView::add_spectrum_pixel(uint8_t power) {
-    spectrum_row[pixel_index] = spectrum_rgb3_lut[power];                                                                           // row of colors
+    spectrum_row[pixel_index] = gradient.lut[power];                                                                                // row of colors
     spectrum_data[pixel_index] = (live_frequency_integrate * spectrum_data[pixel_index] + power) / (live_frequency_integrate + 1);  // smoothing
     pixel_index++;
 
@@ -359,6 +359,10 @@ GlassView::GlassView(
     : nav_(nav) {
     baseband::run_image(portapack::spi_flash::image_tag_wideband_spectrum);
 
+    if (!gradient.load_file(default_gradient_file)) {
+        gradient.set_default();
+    }
+
     add_children({&labels,
                   &field_frequency_min,
                   &field_frequency_max,

firmware/application/apps/ui_looking_glass_app.hpp

@@ -35,7 +35,7 @@
 #include "ui_receiver.hpp"
 #include "string_format.hpp"
 #include "analog_audio_app.hpp"
-#include "spectrum_color_lut.hpp"
+#include "gradient.hpp"
 
 namespace ui {
 
@@ -74,6 +74,7 @@ class GlassView : public View {
 
    private:
     NavigationView& nav_;
+    Gradient gradient{};
     RxRadioState radio_state_{ReceiverModel::Mode::SpectrumAnalysis};
     // Settings
     rf::Frequency f_min = 260 * MHZ_DIV;  // Default to 315/433 remote range.

firmware/application/apps/ui_search.cpp

@@ -56,6 +56,10 @@ SearchView::SearchView(
     : nav_(nav) {
     baseband::run_image(portapack::spi_flash::image_tag_wideband_spectrum);
 
+    if (!gradient.load_file(default_gradient_file)) {
+        gradient.set_default();
+    }
+
     add_children({&labels,
                   &field_frequency_min,
                   &field_frequency_max,
@@ -290,7 +294,7 @@ void SearchView::on_channel_spectrum(const ChannelSpectrum& spectrum) {
                 power = spectrum.db[bin - 128];
         }
 
-        add_spectrum_pixel(spectrum_rgb3_lut[power]);
+        add_spectrum_pixel(gradient.lut[power]);
 
         mean_acc += power;
         if (power > max_power) {

firmware/application/apps/ui_search.hpp

@@ -24,7 +24,7 @@
 #include "receiver_model.hpp"
 #include "recent_entries.hpp"
 #include "radio_state.hpp"
-#include "spectrum_color_lut.hpp"
+#include "gradient.hpp"
 #include "ui_receiver.hpp"
 
 namespace ui {
@@ -88,6 +88,7 @@ class SearchView : public View {
 
    private:
     NavigationView& nav_;
+    Gradient gradient{};
     RxRadioState radio_state_{
         100'000'000 /* frequency */,
         2500000 /* bandwidth */,