From cf1aee508dca530141bda66277ac5075fcec1f70 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Thu, 28 Dec 2017 02:24:34 +0100
Subject: Add texture loading (not usage) using SOIL

Add soil add dependency
---
 src/RenderBackend/OpenGL/Image.cpp     | 48 ++++++++++++++++++++++++++++++++++
 src/RenderBackend/OpenGL/Texture2D.cpp | 26 ++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 src/RenderBackend/OpenGL/Image.cpp
 create mode 100644 src/RenderBackend/OpenGL/Texture2D.cpp

(limited to 'src/RenderBackend/OpenGL')

diff --git a/src/RenderBackend/OpenGL/Image.cpp b/src/RenderBackend/OpenGL/Image.cpp
new file mode 100644
index 0000000..ba93a51
--- /dev/null
+++ b/src/RenderBackend/OpenGL/Image.cpp
@@ -0,0 +1,48 @@
+#include "../../../include/RenderBackend/OpenGL/Image.hpp"
+#include "soil/1.16.0/inc/SOIL/SOIL.h"
+
+using namespace std;
+
+namespace amalgine
+{
+    Image::Image(unsigned char *_imageData, i32 _width, i32 _height) : imageData(_imageData), width(_width), height(_height)
+    {
+        
+    }
+    
+    Result<Image*> Image::loadFromFile(const char *filepath)
+    {
+        int width;
+        int height;
+        unsigned char *imageData = SOIL_load_image(filepath, &width, &height, 0, SOIL_LOAD_RGB);
+        if(!imageData)
+        {
+            string errMsg = "Failed to load image from file: ";
+            errMsg += filepath;
+            errMsg += "; SOIL error message: ";
+            errMsg += SOIL_last_result();
+            return Result<Image*>::Err(errMsg);
+        }
+        return Result<Image*>::Ok(new Image(imageData, width, height));
+    }
+    
+    const unsigned char* Image::getData() const
+    {
+        return imageData;
+    }
+    
+    i32 Image::getWidth() const
+    {
+        return width;
+    }
+    
+    i32 Image::getHeight() const
+    {
+        return height;
+    }
+    
+    Image::~Image()
+    {
+        SOIL_free_image_data(imageData);
+    }
+}
diff --git a/src/RenderBackend/OpenGL/Texture2D.cpp b/src/RenderBackend/OpenGL/Texture2D.cpp
new file mode 100644
index 0000000..07d807a
--- /dev/null
+++ b/src/RenderBackend/OpenGL/Texture2D.cpp
@@ -0,0 +1,26 @@
+#include "../../../include/RenderBackend/OpenGL/Texture2D.hpp"
+#include "../../../include/RenderBackend/OpenGL/Image.hpp"
+#include "../../../include/RenderBackend/OpenGL/opengl.hpp"
+#include <cassert>
+
+namespace amalgine
+{
+    Texture2D::Texture2D(Image *image)
+    {
+        assert(image);
+        glGenTextures(1, &textureId);
+        glBindTexture(GL_TEXTURE_2D, textureId);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, image->getWidth(), image->getHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, image->getData());
+        
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glGenerateMipmap(GL_TEXTURE_2D);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    }
+
+    Texture2D::~Texture2D()
+    {
+        glDeleteTextures(1, &textureId);
+    }
+}
-- 
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