merge with niels/rendering

1 files changed, 74 insertions, 0 deletions

diff --git a/resource-manager/TextureMap.cpp b/resource-manager/TextureMap.cpp
new file mode 100644
index 0000000..847bab9
--- /dev/null
+++ b/resource-manager/TextureMap.cpp
@@ -0,0 +1,74 @@
+#include "TextureMap.h"
+
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+#include <iostream>
+#include <cstdint>
+
+TextureMap::TextureMap()
+    : m_texture(nullptr)
+{
+
+}
+
+TextureMap::~TextureMap()
+{
+    if (m_texture)
+    {
+        SDL_DestroyTexture(m_texture);
+    }
+}
+
+//public
+bool TextureMap::loadFromFile(const std::string& path, SDL_Renderer* renderer)
+{
+    assert(renderer != nullptr);
+    assert(!path.empty());
+
+    std::int32_t x = 0;
+    std::int32_t y = 0;
+    std::int32_t c = 0;
+    unsigned char* data = stbi_load(path.c_str(), &x, &y, &c, 0);
+
+    if (data)
+    {
+        std::int32_t pitch = x * c;
+        pitch = (pitch + 3) & ~3;
+
+        constexpr std::int32_t rmask = 0x000000ff;
+        constexpr std::int32_t gmask = 0x0000ff00;
+        constexpr std::int32_t bmask = 0x00ff0000;
+        const std::int32_t amask = c == 4 ? 0xff000000 : 0;
+
+        auto* surface = SDL_CreateRGBSurfaceFrom(data, x, y, c * 8, pitch, rmask, gmask, bmask, amask);
+
+        if (!surface)
+        {
+            std::cerr << "Unable to create texture surface: " << SDL_GetError() << "\n";
+            stbi_image_free(data);
+            return false;
+        }
+
+        m_texture = SDL_CreateTextureFromSurface(renderer, surface);
+
+        SDL_FreeSurface(surface);
+        stbi_image_free(data);
+
+        if (!m_texture)
+        {
+            std::cerr << "Failed to create texture for " << path << "\n";
+            return false;
+        }
+
+        //sets alpha blending
+        //SDL_SetTextureBlendMode(m_texture, SDL_BLENDMODE_BLEND);
+        m_size.x = x;
+        m_size.y = y;
+
+        return true;
+    }
+
+    return false;
+}