Inky Frame: Add thickness support for Hershey text.

libraries/pico_graphics/pico_graphics.hpp

@@ -364,7 +364,7 @@ namespace pimoroni {
 
       void set_pen(uint c) override;
       void set_pen(uint8_t r, uint8_t g, uint8_t b) override;
-      void set_thickness(uint t) override {};
+      void set_thickness(uint t) override;
       int create_pen(uint8_t r, uint8_t g, uint8_t b) override;
       int create_pen_hsv(float h, float s, float v) override;
 
@@ -570,7 +570,7 @@ namespace pimoroni {
       PicoGraphics_PenInky7(uint16_t width, uint16_t height, IDirectDisplayDriver<uint8_t> &direct_display_driver);
       void set_pen(uint c) override;
       void set_pen(uint8_t r, uint8_t g, uint8_t b) override;
-      void set_thickness(uint t) override {};
+      void set_thickness(uint t) override;
       int create_pen(uint8_t r, uint8_t g, uint8_t b) override;
       int create_pen_hsv(float h, float s, float v) override;
       void set_pixel(const Point &p) override;

libraries/pico_graphics/pico_graphics_pen_3bit.cpp

@@ -44,6 +44,9 @@ namespace pimoroni {
     int PicoGraphics_Pen3Bit::create_pen_hsv(float h, float s, float v) {
         return RGB::from_hsv(h, s, v).to_rgb888() | 0x7f000000;
     }
+    void PicoGraphics_Pen3Bit::set_thickness(uint t) {
+        thickness = t;
+    }
     void PicoGraphics_Pen3Bit::set_pixel(const Point &p) {
         if ((color & 0x7f000000) == 0x7f000000) {
             set_pixel_dither(p, RGB(color));

libraries/pico_graphics/pico_graphics_pen_inky7.cpp

@@ -18,6 +18,9 @@ namespace pimoroni {
   int PicoGraphics_PenInky7::create_pen_hsv(float h, float s, float v) {
     return RGB::from_hsv(h, s, v).to_rgb888() | 0x7f000000;
   }
+  void PicoGraphics_PenInky7::set_thickness(uint t) {
+    thickness = t;
+  }
   void PicoGraphics_PenInky7::set_pixel(const Point &p) {
     if ((color & 0x7f000000) == 0x7f000000) {
       set_pixel_dither(p, RGB(color));

micropython/modules/picographics/picographics.cpp

@@ -758,7 +758,10 @@ mp_obj_t ModPicoGraphics_create_pen_hsv(size_t n_args, const mp_obj_t *args) {
 mp_obj_t ModPicoGraphics_set_thickness(mp_obj_t self_in, mp_obj_t pen) {
     ModPicoGraphics_obj_t *self = MP_OBJ_TO_PTR2(self_in, ModPicoGraphics_obj_t);
 
-    if(self->graphics->pen_type != PicoGraphics::PEN_1BIT) {
+    if(
+       self->graphics->pen_type != PicoGraphics::PEN_1BIT
+    && self->graphics->pen_type != PicoGraphics::PEN_3BIT
+    && self->graphics->pen_type != PicoGraphics::PEN_INKY7) {
         mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("Thickness not supported!"));
     }