Trying to implement image mapping.

Something not working yet.

source/canvas.cpp

@@ -68,3 +68,10 @@ bool Canvas::SaveAsPNG(const char *filename)
 
     return ret == 0;
 }
+
+Canvas::Canvas(const char *pngfile)
+{
+    uint32_t ret = lodepng_decode24_file(&this->bitmap, &this->width, &this->height, pngfile);
+    if(ret){ printf("error %u: %s\n", ret, lodepng_error_text(ret));}
+    printf("%p - %d - %d\n", this->bitmap, this->width, this->height);
+}

source/include/canvas.h

@@ -23,6 +23,8 @@ public:
     Canvas(uint32_t width, uint32_t height);
     Canvas(const Canvas *c);
     Canvas(const Canvas &c);
+    Canvas(const char *pngfile);
+
     ~Canvas();
 
     void putPixel(uint32_t x, uint32_t y, Tuple c);

source/uvpattern/uv_image.h

@@ -0,0 +1,43 @@
+/*
+ *  DoRayMe - a quick and dirty Raytracer
+ *  UV Image pattern header
+ *
+ *  Created by Manoël Trapier
+ *  Copyright (c) 2020 986-Studio.
+ *
+ */
+
+#ifndef DORAYME_UV_IMAGE_H
+#define DORAYME_UV_IMAGE_H
+
+#include <stdint.h>
+
+#include <uv_pattern.h>
+#include <canvas.h>
+#include <tuple.h>
+
+class UVImage : public UVPattern
+{
+public:
+    Canvas *image;
+
+    UVImage(Canvas *image) : UVPattern(1, 1, Colour(0, 0, 0), Colour(0, 0, 0)),
+            image(image) {};
+
+    UVImage(const char *filepath) : UVPattern(1, 1, Colour(0, 0, 0), Colour(0, 0, 0)) {
+        this->image = new Canvas(filepath);
+        this->width = this->image->width;
+        this->height = this->image->height;
+    };
+
+    Colour uvPatternAt(double u, double v) {
+        v = 1 - v;
+        double x = u * (this->image->width/2.0 - 1);
+        double y = v * (this->image->height/2.0 - 1);
+
+        Colour ret = this->image->getPixel(round(x), round(y));
+        return ret;
+    };
+};
+
+#endif /* DORAYME_UV_IMAGE_H */