moved from h4570/tyra

src/engine/loaders/bmp_loader.cpp

@@ -0,0 +1,79 @@
+/*
+# ______       ____   ___
+#   |     \/   ____| |___|    
+#   |     |   |   \  |   |       
+#-----------------------------------------------------------------------
+# Copyright 2020, tyra - https://github.com/h4570/tyra
+# Licenced under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#include "../include/loaders/bmp_loader.hpp"
+
+#include "../include/utils/debug.hpp"
+#include "../include/utils/string.hpp"
+#include <cstdlib>
+
+// ----
+// Constructors/Destructors
+// ----
+
+BmpLoader::BmpLoader() {}
+
+BmpLoader::~BmpLoader() {}
+
+// ----
+// Methods
+// ----
+
+/**
+ * @param t_name Without extension. Example "skyfall2"
+ * @param t_extension With dot and extension. Example ".BMP"
+ */
+void BmpLoader::load(Texture &o_texture, char *t_subfolder, char *t_name, char *t_extension)
+{
+    char *t_path_part = String::createConcatenated(t_subfolder, t_name);
+    char *t_path = String::createConcatenated(t_path_part, t_extension);
+    delete[] t_path_part;
+
+    FILE *file = fopen(t_path, "rb");
+
+    if (file == NULL)
+        PRINT_ERR("Failed to load .bmp file!");
+
+    unsigned char header[54];
+    fread(header, sizeof(unsigned char), 54, file);
+
+    u32 width = *(u32 *)&header[18];
+    u32 height = *(u32 *)&header[22];
+    o_texture.id = rand() % 100000;
+    o_texture.width = width;
+    o_texture.height = height;
+    o_texture.data = new unsigned char[width * height * 3];
+    printf("BMPLoader - width: %d | height: %d\n", width, height);
+
+    u64 rowPadded = (width * 3 + 3) & (~3);
+
+    unsigned char *data = new unsigned char[rowPadded];
+    unsigned char tmp;
+
+    u32 x = 0;
+    for (u32 i = 0; i < height; i++)
+    {
+        fread(data, sizeof(unsigned char), rowPadded, file);
+        for (u32 j = 0; j < width * 3; j += 3)
+        {
+            // Convert (B, G, R) to (R, G, B)
+            tmp = data[j];
+            data[j] = data[j + 2];
+            data[j + 2] = tmp;
+
+            o_texture.data[x] = data[j];
+            o_texture.data[x + 1] = data[j + 1];
+            o_texture.data[x + 2] = data[j + 2];
+            x += 3;
+        }
+    }
+    delete[] t_path;
+    delete[] data;
+}