[add]: Texture and Pixel buffers

4 files changed, 117 insertions, 0 deletions

diff --git a/src/Platform/OpenGL/OpenGLRendererAPI.cpp b/src/Platform/OpenGL/OpenGLRendererAPI.cpp
index 3660555..5ee7d8d 100644
--- a/src/Platform/OpenGL/OpenGLRendererAPI.cpp
+++ b/src/Platform/OpenGL/OpenGLRendererAPI.cpp
@@ -8,6 +8,11 @@ namespace Donut
         glEnable(GL_BLEND);
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
         glEnable(GL_DEPTH_TEST);
+        glDepthFunc(GL_LESS);
+        
+        glEnable(GL_CULL_FACE);
+        glCullFace(GL_BACK);
+        glFrontFace(GL_CCW);
     }
 
     void OpenGLRendererAPI::SetViewport(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
@@ -30,6 +35,18 @@ namespace Donut
         glEnable(GL_DEPTH_TEST);
     }
 
+    void OpenGLRendererAPI::SetFaceCulling(bool enabled)
+    {
+        if (enabled)
+        {
+            glEnable(GL_CULL_FACE);
+            glCullFace(GL_BACK);
+            glFrontFace(GL_CCW);
+        }
+        else
+            glDisable(GL_CULL_FACE);
+    }
+
     void OpenGLRendererAPI::DrawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount)
     {
         uint32_t count = indexCount ? indexCount : vertexArray->GetIndexBuffer()->GetCount();
diff --git a/src/Platform/OpenGL/OpenGLRendererAPI.h b/src/Platform/OpenGL/OpenGLRendererAPI.h
index f37cc79..35bd9c3 100644
--- a/src/Platform/OpenGL/OpenGLRendererAPI.h
+++ b/src/Platform/OpenGL/OpenGLRendererAPI.h
@@ -14,6 +14,7 @@ namespace Donut
         virtual void SetClearColor(const glm::vec4& color) override;
         virtual void Clear() override;
         virtual void EnableDepthTest() override;
+        virtual void SetFaceCulling(bool enabled) override;
 
         virtual void DrawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount = 0) override;
     };
diff --git a/src/Platform/OpenGL/OpenGLTexture.cpp b/src/Platform/OpenGL/OpenGLTexture.cpp
new file mode 100644
index 0000000..02252d1
--- /dev/null
+++ b/src/Platform/OpenGL/OpenGLTexture.cpp
@@ -0,0 +1,66 @@
+#include "OpenGLTexture.h"
+#include <iostream>
+
+namespace Donut
+{
+    OpenGLTexture2D::OpenGLTexture2D(uint32_t width, uint32_t height)
+        : m_Width(width), m_Height(height)
+    {
+        m_InternalFormat = GL_RGBA8;
+        m_DataFormat = GL_RGBA;
+
+        glCreateTextures(GL_TEXTURE_2D, 1, &m_RendererID);
+        glTextureStorage2D(m_RendererID, 1, m_InternalFormat, m_Width, m_Height);
+
+        glTextureParameteri(m_RendererID, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTextureParameteri(m_RendererID, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    }
+
+    // TODO: Texture Loading
+    OpenGLTexture2D::OpenGLTexture2D(const std::string& path)
+        : m_Path(path)
+    {
+        m_Width = 1;
+        m_Height = 1;
+        m_InternalFormat = GL_RGBA8;
+        m_DataFormat = GL_RGBA;
+
+        glCreateTextures(GL_TEXTURE_2D, 1, &m_RendererID);
+        glTextureStorage2D(m_RendererID, 1, m_InternalFormat, m_Width, m_Height);
+
+        glTextureParameteri(m_RendererID, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTextureParameteri(m_RendererID, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+        uint32_t whitePixel = 0xFFFFFFFF;
+        glTextureSubImage2D(m_RendererID, 0, 0, 0, m_Width, m_Height, m_DataFormat, GL_UNSIGNED_BYTE, &whitePixel);
+
+        std::cout << "Created default texture (stb_image not available for loading: " << path << ")" << std::endl;
+    }
+
+    OpenGLTexture2D::~OpenGLTexture2D()
+    {
+        glDeleteTextures(1, &m_RendererID);
+    }
+
+    void OpenGLTexture2D::SetData(void* data, uint32_t size)
+    {
+        uint32_t bpp = m_DataFormat == GL_RGBA ? 4 : 3;
+        if (size != m_Width * m_Height * bpp)
+        {
+            std::cout << "Data must be entire texture!" << std::endl;
+            return;
+        }
+        glTextureSubImage2D(m_RendererID, 0, 0, 0, m_Width, m_Height, m_DataFormat, GL_UNSIGNED_BYTE, data);
+    }
+
+    void OpenGLTexture2D::Bind(uint32_t slot) const
+    {
+        glBindTextureUnit(slot, m_RendererID);
+    }
+};
\ No newline at end of file
diff --git a/src/Platform/OpenGL/OpenGLTexture.h b/src/Platform/OpenGL/OpenGLTexture.h
new file mode 100644
index 0000000..4a95ab4
--- /dev/null
+++ b/src/Platform/OpenGL/OpenGLTexture.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include "Rendering/Texture.h"
+#include <glad/glad.h>
+
+namespace Donut
+{
+    class OpenGLTexture2D : public Texture2D
+    {
+    public:
+        OpenGLTexture2D(uint32_t width, uint32_t height);
+        OpenGLTexture2D(const std::string& path);
+        virtual ~OpenGLTexture2D();
+
+        virtual uint32_t GetWidth() const override { return m_Width; }
+        virtual uint32_t GetHeight() const override { return m_Height; }
+        virtual uint32_t GetRendererID() const override { return m_RendererID; }
+
+        virtual void SetData(void* data, uint32_t size) override;
+        virtual void Bind(uint32_t slot = 0) const override;
+
+        virtual bool operator==(const Texture& other) const override
+        {
+            return m_RendererID == other.GetRendererID();
+        }
+
+    private:
+        std::string m_Path;
+        uint32_t m_Width, m_Height;
+        uint32_t m_RendererID;
+        GLenum m_InternalFormat, m_DataFormat;
+    };
+}