implement asset util

RELENTLESS/include/asset.h

@@ -0,0 +1,88 @@
+#pragma once
+
+#ifndef _ASSET_H_
+#define _ASSET_H_
+
+#include "api.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef V5_API_H_
+
+typedef struct __attribute__((__packed__)) _v5_image {
+  uint16_t width;
+  uint16_t height;
+  uint32_t *data;
+  uint32_t *p;
+} v5_image;
+
+uint32_t vexImageBmpRead(const uint8_t *ibuf, v5_image *oBuf, uint32_t maxw, uint32_t maxh);
+uint32_t vexImagePngRead(const uint8_t *ibuf, v5_image *oBuf, uint32_t maxw, uint32_t maxh, uint32_t ibuflen);
+void vexDisplayCopyRect(int32_t x1, int32_t y1, int32_t x2, int32_t y2, uint32_t *pSrc, int32_t srcStride);
+
+#endif
+
+typedef struct __attribute__((__packed__)) _asset {
+  uint8_t *buf;
+  size_t size;
+} asset;
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef __cplusplus
+
+#define ASSET(x)                                                                    \
+  extern "C" {                                                                      \
+  extern uint8_t _binary_static_##x##_start[], _binary_static_##x##_size[];         \
+  static asset x = {_binary_static_##x##_start, (size_t)_binary_static_##x##_size}; \
+  }
+
+#else
+
+#define ASSET(x)                                                            \
+  extern uint8_t _binary_static_##x##_start[], _binary_static_##x##_size[]; \
+  static asset x = {_binary_static_##x##_start, (size_t)_binary_static_##x##_size};
+
+#endif
+
+#define DECODE_PNG(var, asset, width, height) \
+  var.data = new uint32_t[width * height];    \
+  vexImagePngRead(asset.buf, &var, width, height, asset.size);
+
+#define DECODE_BMP(var, asset, width, height) \
+  var.data = new uint32_t[width * height];    \
+  vexImageBmpRead(asset.buf, &var, width, height);
+
+
+static void draw_image(int x, int y, v5_image *image) {
+  int x2 = x + image->width - 1;
+  int y2 = y + image->height - 1;
+  vexDisplayCopyRect(x, y, x2, y2, image->data, x2 - x + 1);
+}
+
+static void draw_image(lv_obj_t *canvas, int x, int y, v5_image *image) {
+  int start_x = x;
+  int start_y = y;
+
+  for (int i = 0; i < image->height; i++) {
+    for (int j = 0; j < image->width; j++) {
+      lv_color_t c = lv_color_hex(image->data[i * image->width + j]);
+      lv_color_t d = lv_canvas_get_px(canvas, start_x + j, start_y + i);
+
+      float a_float = c.alpha / 2.55 / 100;
+      float a_m_float = 1 - a_float;
+
+      d.red = d.red * a_m_float + c.red * a_float;
+      d.green = d.green * a_m_float + c.green * a_float;
+      d.blue = d.blue * a_m_float + c.blue * a_float;
+
+      lv_canvas_set_px(canvas, start_x + j, start_y + i, d);
+    }
+  }
+}
+
+#endif // _ASSET_H_