Added RGB88 pen type

libraries/pico_graphics/pico_graphics.hpp

@@ -24,6 +24,7 @@
 namespace pimoroni {
   typedef uint8_t RGB332;
   typedef uint16_t RGB565;
+  typedef uint32_t RGB888;
   struct RGB {
     int16_t r, g, b;
 
@@ -83,6 +84,10 @@ namespace pimoroni {
     constexpr RGB565 to_rgb332() {
       return (r & 0b11100000) | ((g & 0b11100000) >> 3) | ((b & 0b11000000) >> 6);
     }
+
+    constexpr RGB888 to_rgb888() {
+      return (r << 16) | (g << 8) | (b << 0);
+    }
   };
 
   typedef int Pen;
@@ -419,6 +424,23 @@ namespace pimoroni {
       }
   };
 
+  
+  class PicoGraphics_PenRGB888 : public PicoGraphics {
+    public:
+      RGB src_color;
+      RGB888 color;
+      PicoGraphics_PenRGB888(uint16_t width, uint16_t height, void *frame_buffer);
+      void set_pen(uint c) override;
+      void set_pen(uint8_t r, uint8_t g, uint8_t b) override;
+      int create_pen(uint8_t r, uint8_t g, uint8_t b) override;
+      void set_pixel(const Point &p) override;
+      void set_pixel_span(const Point &p, uint l) override;
+      static size_t buffer_size(uint w, uint h) {
+        return w * h * sizeof(uint32_t);
+      }
+  };
+
+
   class DisplayDriver {
     public:
       uint16_t width;

libraries/pico_graphics/pico_graphics_pen_rgb888.cpp

@@ -0,0 +1,33 @@
+#include "pico_graphics.hpp"
+
+namespace pimoroni {
+    PicoGraphics_PenRGB888::PicoGraphics_PenRGB888(uint16_t width, uint16_t height, void *frame_buffer)
+    : PicoGraphics(width, height, frame_buffer) {
+        this->pen_type = PEN_RGB888;
+        if(this->frame_buffer == nullptr) {
+            this->frame_buffer = (void *)(new uint8_t[buffer_size(width, height)]);
+        }
+    }
+    void PicoGraphics_PenRGB888::set_pen(uint c) {
+        color = {c, c, c};
+    }
+    void PicoGraphics_PenRGB888::set_pen(uint8_t r, uint8_t g, uint8_t b) {
+        color = {r, g, b};
+    }
+    int PicoGraphics_PenRGB888::create_pen(uint8_t r, uint8_t g, uint8_t b) {
+        return RGB(r, g, b).to_rgb888();
+    }
+    void PicoGraphics_PenRGB888::set_pixel(const Point &p) {
+        uint32_t *buf = (uint32_t *)frame_buffer;
+        buf[p.y * bounds.w + p.x] = color;
+    }
+    void PicoGraphics_PenRGB888::set_pixel_span(const Point &p, uint l) {
+        // pointer to byte in framebuffer that contains this pixel
+        uint32_t *buf = (uint32_t *)frame_buffer;
+        buf = &buf[p.y * bounds.w + p.x];
+
+        while(l--) {
+            *buf++ = color;
+        }
+    }
+}