wip: image display

Signed-off-by: Thomas Schmid <tom@binary-kitchen.de>

firmware/include/app.h

@@ -30,3 +30,9 @@ struct FackelApp: public App {
     void deinit();
     void loop();
 };
+
+struct ImageDisplayApp: public App {
+    void init();
+    void deinit();
+    void loop();
+};

firmware/src/applications/image_display.cpp

@@ -0,0 +1,57 @@
+#include "app.h"
+#include "zauberstab.h"
+
+#define __stringify_1(x)	#x
+#define __stringify(x)		__stringify_1(x)
+
+extern "C"
+{
+asm(
+".macro inc_sample name, filename\n\t"
+        ".pushsection .rodata\n\t"
+        "\\name:\n\t"
+                ".incbin \"\\filename\"\n\t"
+        "\\name\\()_size:\n\t"
+	".int \\name\\()_size - \\name\n\t"
+        ".popsection\n\t"
+".endm\n\t"
+);
+
+#define incbin(label, filename) \
+	asm("inc_sample " __stringify(label) ", " filename "\n\t"); \
+	extern const unsigned char label[]; \
+	extern const unsigned int label##_size; \
+
+
+incbin(fusion_font, "C:/Users/Binarykitchen/Documents/tom/fusion-zauberstab/firmware/src/applications/fusion_font.bin")
+}
+
+static CRGB get_pixel(unsigned int x, unsigned int y, unsigned int sx, const unsigned char *data) {
+    unsigned int idx = (x + y * sx) * 3;
+
+    CRGB color{};
+    color.r = data[idx];
+    color.g = data[idx + 1];
+    color.b = data[idx + 2];
+
+    return color;
+}
+
+void ImageDisplayApp::init() {
+
+}
+
+void ImageDisplayApp::deinit() {
+
+}
+
+void ImageDisplayApp::loop() {
+    static unsigned int col = 0;
+
+    for (int i = 0; i< NUM_LEDS; i++) {
+        leds[i] = get_pixel(col, i, 218, fusion_font);
+    }
+    col++;
+    col = col % 218;
+    FastLED.show();
+}

firmware/src/main.cpp

@@ -15,11 +15,13 @@ struct FFTTestApp fft_test_app
 struct FackelApp fackel_app
 {
 };
+struct ImageDisplayApp image_display {};
 
 
 std::vector<std::reference_wrapper<App>> apps = {
     std::ref<App>(beat_detect_app),
-    std::ref<App>(fackel_app)
+    std::ref<App>(fackel_app),
+    std::ref<App>(image_display),
     };
 
 static unsigned int current_app = 0;