feat(epicardium): Add a boot animation to show off CTX

epicardium/epic_boot.c

+#include <math.h>
+
+static const uint8_t pride_colors[6][3] = {
+	{ 0xe4, 0x02, 0x02 }, { 0xff, 0x8c, 0x00 }, { 0xff, 0xed, 0x00 },
+	{ 0x00, 0x80, 0x26 }, { 0x00, 0x4d, 0xff }, { 0x75, 0x06, 0x87 },
+};
+
+static void epic_frame(Ctx *epicardium_ctx, float frame)
+{
+	int num_colors = sizeof(pride_colors) / sizeof(pride_colors[0]);
+	for (int color = 0; color < num_colors; color++) {
+		ctx_rgba8_stroke(
+			epicardium_ctx,
+			pride_colors[color][0],
+			pride_colors[color][1],
+			pride_colors[color][2],
+			0xff
+		);
+		ctx_line_width(epicardium_ctx, 10.0);
+		ctx_line_cap(epicardium_ctx, CTX_CAP_ROUND);
+
+		float width =
+			expf(-pow(frame / 2.0 - 5 + color / 2.0, 2)) * 55.0 +
+			5.0;
+
+		float ypos = color * 10.0 + 40.0 - (num_colors - 1) * 5.0;
+
+		ctx_move_to(epicardium_ctx, 80.0 - width, ypos);
+		ctx_line_to(epicardium_ctx, 80.0 + width, ypos);
+		ctx_stroke(epicardium_ctx);
+	}
+
+	ctx_save(epicardium_ctx);
+
+	ctx_font_size(epicardium_ctx, 20.0f);
+	ctx_text_baseline(epicardium_ctx, CTX_TEXT_BASELINE_BOTTOM);
+	ctx_rgba8(epicardium_ctx, 0xff, 0xff, 0xff, 0xff);
+
+	ctx_text_align(epicardium_ctx, CTX_TEXT_ALIGN_CENTER);
+	ctx_move_to(epicardium_ctx, 80.0f, 58.0f);
+	ctx_text(epicardium_ctx, "Epicardium");
+
+	if (strcmp(CARD10_VERSION, "v1.18") != 0) {
+		ctx_text_align(epicardium_ctx, CTX_TEXT_ALIGN_LEFT);
+		ctx_move_to(epicardium_ctx, 2.0f, 78.0f);
+		ctx_text(epicardium_ctx, CARD10_VERSION);
+	} else {
+		ctx_move_to(epicardium_ctx, 80.0f, 78.0f);
+		ctx_text(epicardium_ctx, "Queer Quinoa");
+	}
+
+	ctx_restore(epicardium_ctx);
+}

epicardium/main.c

@@ -20,6 +20,8 @@
 #include <string.h>
 #include <machine/endian.h>
 
+#include "epic_boot.c"
+
 int main(void)
 {
 	watchdog_init();
@@ -37,15 +39,14 @@ int main(void)
 	epic_leds_set(12, 0, 0, 1);
 	epic_leds_set(13, 0, 0, 1);
 	epic_leds_set(14, 0, 0, 1);
-	for (int i = 0; i < 3; i++) {
-		epic_leds_set_rocket(i, 31);
-		mxc_delay(166666);
-		epic_leds_set_rocket(i, 0);
-	}
-	epic_leds_clear_all(0, 0, 0);
 
 	epic_disp_clear(0x0000);
 
+#if 0 /* reenable for future releases */
+	epic_leds_set_rocket(0, 31);
+	epic_leds_set_rocket(1, 31);
+	epic_leds_set_rocket(2, 31);
+
 	// TODO: Use blit function here
 #if BYTE_ORDER == LITTLE_ENDIAN
 	for (size_t i = 0; i < sizeof(epicardium_ctx_fb); i += 2) {
@@ -74,6 +75,30 @@ int main(void)
 	}
 	epic_disp_update();
 	mxc_delay(2000000);
+#else
+	for (uint32_t frame = 0; frame < 15; frame++) {
+		switch (frame) {
+		case 0:
+			epic_leds_set_rocket(0, 31);
+			break;
+		case 5:
+			epic_leds_set_rocket(1, 31);
+			break;
+		case 10:
+			epic_leds_set_rocket(2, 31);
+			break;
+		}
+
+		epic_disp_clear(0x0000);
+		epic_frame(epicardium_ctx, frame);
+		epic_disp_update();
+	}
+
+	/* re-init for the first app */
+	disp_ctx_reinit();
+#endif
+
+	epic_leds_clear_all(0, 0, 0);
 
 	LOG_DEBUG("startup", "Initializing tasks ...");