Themes: add 'Pride' rainbow-background preset

The theme system stores one flat background colour per element, so a rainbow
background can't be expressed as a preset alone. Add a small display hook:
when Pride is selected, displayClearBuf()/displayClearRows() paint the six
pride-flag stripes across the framebuffer instead of a flat fill (gated on a
flag only the Pride preset sets, and behind HAS_COLOURS so mono builds are
untouched). Non-selected menu rows draw text straight over the canvas, while
the title/header/notifications paint solid white boxes, so chrome stays
readable over the stripes; blue/violet are lightened slightly for black-text
contrast. Docs and changelog updated.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,10 +7,15 @@ single running list until the first versioned release.
 
 ## Unreleased
 
-- **Two new theme presets** (Display Options → "Theme"): **Red** (black-on-red
+- **Three new theme presets** (Display Options → "Theme"): **Red** (black-on-red
-  day / red-on-black night) and **Neon 80s**, an 80s-synthwave palette that maps
+  day / red-on-black night); **Neon 80s**, an 80s-synthwave palette that maps
   several neon colours (cyan, magenta, violet, green, yellow) across the
-  individual UI elements over a dark background.
+  individual UI elements over a dark background; and **Pride**, which paints the
+  background as a rainbow pride flag with black text and white menu/header boxes
+  kept readable over the stripes.
+- **Build:** each build now prints a per-region memory-usage summary
+  (FLASH / RAM / CCMRAM used, size and free) so the remaining headroom is
+  visible after every build.
 
 ## 0.7.1
 

MANUAL.md

@@ -70,6 +70,11 @@ Pick a colour theme on the radio at **Menu → Options → Display Options → "
 - **Red** — black-on-red by day, red-on-black at night.
 - **Neon 80s** — an 80s-synthwave palette with several neon colours (cyan,
   magenta, violet, green, yellow) across the UI over a dark background.
+- **Pride** — the background is painted as a rainbow pride flag; body text is
+  black over the stripes, and the menu title, header and notifications use white
+  boxes so they stay readable. (Text drawn directly over the brightest stripes
+  has lower contrast than a solid-background theme — that's inherent to a
+  rainbow background.)
 
 Editing colours in the CPS only affects **Custom**; the built-in presets are
 fixed. Every element (S-meter, frequencies, menus) follows the selected theme.

MDUV380_firmware/application/include/hardware/HX8353E.h

@@ -279,6 +279,7 @@ typedef enum
 	THEME_PRESET_VERTEXIC,   // amber/orange (black-on-amber day / amber-on-black night)
 	THEME_PRESET_RED,        // red (black-on-red day / red-on-black night)
 	THEME_PRESET_NEON80S,    // 80s synthwave: cyan/magenta/violet/green neon on dark
+	THEME_PRESET_PRIDE,      // pride flag: black text + white chrome over a rainbow background
 	NUM_THEME_PRESETS
 } themePreset_t;
 

MDUV380_firmware/application/source/hardware/HX8353E_display.c

@@ -67,6 +67,21 @@ static uint16_t backgroundColour = 0xFFFFU;
 
 static uint16_t screenBufData[DISPLAY_SIZE_X * DISPLAY_SIZE_Y];
 uint16_t *screenBuf = screenBufData;
+
+#if defined(HAS_COLOURS)
+// When the Pride theme is active the background canvas is painted as six
+// horizontal rainbow stripes instead of a single flat colour.
+static bool prideBackgroundActive = false;
+static uint16_t prideStripes[6];
+
+// Pride stripe colour for a linear screen-buffer index (row = index / width).
+static inline uint16_t pridePixelColour(int index)
+{
+	int band = ((index / DISPLAY_SIZE_X) * 6) / DISPLAY_SIZE_Y;
+
+	return prideStripes[(band < 0) ? 0 : ((band > 5) ? 5 : band)];
+}
+#endif
 //#define DISPLAY_CHECK_BOUNDS
 
 #ifdef DISPLAY_CHECK_BOUNDS
@@ -326,6 +341,16 @@ int displayPrintCoreDoubleHeight(int16_t xPos, int16_t yPos, const char *szMsg,
 
 void displayClearBuf(void)
 {
+#if defined(HAS_COLOURS)
+	if (prideBackgroundActive)
+	{
+		for (int i = 0; i < DISPLAY_SIZE_X * DISPLAY_SIZE_Y; i++)
+		{
+			screenBuf[i] = pridePixelColour(i);
+		}
+		return;
+	}
+#endif
 	// may be able to do this using DMA
 	for(int i = 0; i < DISPLAY_SIZE_X * DISPLAY_SIZE_Y; i++)
 	{
@@ -353,7 +378,11 @@ void displayClearRows(int16_t startRow, int16_t endRow, bool isInverted)
 
 	for(int i = startRow; i < endRow; i++)
 	{
+#if defined(HAS_COLOURS)
+		screenBuf[i] = ((prideBackgroundActive && (isInverted == false)) ? pridePixelColour(i) : fillColour);
+#else
 		screenBuf[i] = fillColour;
+#endif
 	}
 
 }
@@ -1584,12 +1613,27 @@ static void themeSetNeon80s(DayTime_t daytime, uint32_t bg)
 	themeSetItem(daytime, THEME_ITEM_FG_BD_COLOUR,        orange);
 }
 
+// Pride: the background canvas is painted as a rainbow (see pridePixelColour);
+// the theme items only need black text plus white "chrome" boxes (menu title,
+// header, notifications) so those stay readable over any stripe. The selected
+// menu row already inverts to a black bar with white text.
+static void themeSetPride(DayTime_t daytime)
+{
+	themeSetAllItems(daytime, 0x000000, 0xFFFFFF); // black text, white chrome backgrounds
+
+	// Keep warning/error notifications colour-coded on their white box.
+	themeSetItem(daytime, THEME_ITEM_FG_WARNING_NOTIFICATION, 0xC07800);
+	themeSetItem(daytime, THEME_ITEM_FG_ERROR_NOTIFICATION,   0xC00000);
+}
+
 void themeApplyPreset(uint8_t preset)
 {
 	// Start from the monochrome defaults, then overlay the chosen preset.
 	themeInitToDefaultValues(NIGHT, true);
 	themeInitToDefaultValues(DAY, false);
 
+	prideBackgroundActive = false; // only the Pride preset re-enables the rainbow canvas
+
 	switch (preset)
 	{
 		case THEME_PRESET_BASIC80S: // Commodore 64 BASIC: light blue on blue (day & night)
@@ -1617,6 +1661,22 @@ void themeApplyPreset(uint8_t preset)
 			themeSetNeon80s(NIGHT, 0x08040F); // near-black purple
 			break;
 
+		case THEME_PRESET_PRIDE: // rainbow background canvas
+			{
+				// Classic 6-stripe pride flag; blue/violet lightened a little so
+				// black text stays legible over the lower stripes.
+				static const uint32_t prideRGB[6] = { 0xE40303, 0xFF8C00, 0xFFED00, 0x22A93F, 0x3D7DF0, 0xB05CD6 };
+
+				for (int s = 0; s < 6; s++)
+				{
+					prideStripes[s] = PLATFORM_COLOUR_FORMAT_SWAP_BYTES(RGB888_TO_PLATFORM_COLOUR_FORMAT(prideRGB[s]));
+				}
+				prideBackgroundActive = true;
+				themeSetPride(DAY);
+				themeSetPride(NIGHT);
+			}
+			break;
+
 		case THEME_PRESET_CUSTOM:
 		default:
 			// Overlay the user's Custom theme from the codeplug, if present (CPS edits

MDUV380_firmware/application/source/user_interface/menuDisplayOptions.c

@@ -276,7 +276,7 @@ static void updateScreen(bool isFirstRun)
 				case DISPLAY_THEME_PRESET:
 					{
 						// Preset names are plain literals -> rightSideVar (voice-safe).
-						const char *presetNames[] = { "Custom", "BASIC 80s", "Terminal", "Vertexic", "Red", "Neon 80s" };
+						const char *presetNames[] = { "Custom", "BASIC 80s", "Terminal", "Vertexic", "Red", "Neon 80s", "Pride" };
 						uint8_t p = themeGetPreset();
 						leftSide = "Theme";
 						snprintf(rightSideVar, SCREEN_LINE_BUFFER_SIZE, "%s", presetNames[(p < NUM_THEME_PRESETS) ? p : 0]);

README.md

@@ -41,8 +41,8 @@ FreeTRX keeps OpenGD77's core (DMR/FM, hotspot, CPS compatibility) and adds:
   incoming-message popup (see the manual for details).
 - **Theme presets** — pick a colour theme on the radio: **Custom** (CPS-editable,
   default), **BASIC 80s** (Commodore 64), **Terminal** (green-on-black),
-  **Vertexic** (amber/orange), **Red**, or **Neon 80s** (multi-colour synthwave).
+  **Vertexic** (amber/orange), **Red**, **Neon 80s** (multi-colour synthwave),
-  CPS edits only affect Custom.
+  or **Pride** (rainbow background). CPS edits only affect Custom.
 - **On-radio channel management** — create and delete channels directly from the
   Channel quick menu, no PC/CPS required (see [Managing channels](#managing-channels-on-the-radio)).
 - **DMR reliability fix** — resolves a hard-fault (freeze needing a battery pull)