Add OpenGLRenderTargetView and OpenGLDepthStencilView

engine/CMakeLists.txt

@@ -136,6 +136,8 @@ add_library(XCEngine STATIC
     include/XCEngine/RHI/OpenGL/OpenGLSwapChain.h
     include/XCEngine/RHI/OpenGL/OpenGLFence.h
     include/XCEngine/RHI/OpenGL/OpenGLSampler.h
+    include/XCEngine/RHI/OpenGL/OpenGLRenderTargetView.h
+    include/XCEngine/RHI/OpenGL/OpenGLDepthStencilView.h
     src/RHI/OpenGL/OpenGLDevice.cpp
     src/RHI/OpenGL/OpenGLShader.cpp
     src/RHI/OpenGL/OpenGLBuffer.cpp
@@ -146,6 +148,8 @@ add_library(XCEngine STATIC
     src/RHI/OpenGL/OpenGLSwapChain.cpp
     src/RHI/OpenGL/OpenGLFence.cpp
     src/RHI/OpenGL/OpenGLSampler.cpp
+    src/RHI/OpenGL/OpenGLRenderTargetView.cpp
+    src/RHI/OpenGL/OpenGLDepthStencilView.cpp
 )
 
 target_include_directories(XCEngine PUBLIC

engine/include/XCEngine/RHI/OpenGL/OpenGLDepthStencilView.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+enum class DepthStencilFormat {
+    D16_UNORM,
+    D24_UNORM_S8_UINT,
+    D32_FLOAT,
+    D32_FLOAT_S8X24_UINT
+};
+
+class OpenGLDepthStencilView {
+public:
+    OpenGLDepthStencilView();
+    ~OpenGLDepthStencilView();
+
+    bool Initialize(unsigned int texture, int mipLevel = 0);
+    void Shutdown();
+
+    void Bind();
+    void Unbind();
+
+    unsigned int GetID() const { return m_texture; }
+
+private:
+    unsigned int m_texture;
+    unsigned int m_framebuffer;
+    int m_mipLevel;
+};
+
+} // namespace RHI
+} // namespace XCEngine

engine/include/XCEngine/RHI/OpenGL/OpenGLRenderTargetView.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+class OpenGLRenderTargetView {
+public:
+    OpenGLRenderTargetView();
+    ~OpenGLRenderTargetView();
+
+    bool Initialize(unsigned int texture, int mipLevel = 0);
+    void Shutdown();
+
+    void Bind(unsigned int slot);
+    void Unbind();
+
+    unsigned int GetID() const { return m_texture; }
+
+private:
+    unsigned int m_texture;
+    unsigned int m_framebuffer;
+    int m_mipLevel;
+};
+
+} // namespace RHI
+} // namespace XCEngine

engine/src/RHI/OpenGL/OpenGLDepthStencilView.cpp

@@ -0,0 +1,47 @@
+#define GLFW_INCLUDE_NONE
+#include "XCEngine/RHI/OpenGL/OpenGLDepthStencilView.h"
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+OpenGLDepthStencilView::OpenGLDepthStencilView() : m_texture(0), m_framebuffer(0), m_mipLevel(0) {
+}
+
+OpenGLDepthStencilView::~OpenGLDepthStencilView() {
+}
+
+bool OpenGLDepthStencilView::Initialize(unsigned int texture, int mipLevel) {
+    m_texture = texture;
+    m_mipLevel = mipLevel;
+
+    glGenFramebuffers(1, &m_framebuffer);
+    glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, texture, mipLevel);
+    
+    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+        return false;
+    }
+    
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    return true;
+}
+
+void OpenGLDepthStencilView::Shutdown() {
+    if (m_framebuffer) {
+        glDeleteFramebuffers(1, &m_framebuffer);
+        m_framebuffer = 0;
+    }
+}
+
+void OpenGLDepthStencilView::Bind() {
+    glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
+}
+
+void OpenGLDepthStencilView::Unbind() {
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+} // namespace RHI
+} // namespace XCEngine

engine/src/RHI/OpenGL/OpenGLRenderTargetView.cpp

@@ -0,0 +1,47 @@
+#define GLFW_INCLUDE_NONE
+#include "XCEngine/RHI/OpenGL/OpenGLRenderTargetView.h"
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+OpenGLRenderTargetView::OpenGLRenderTargetView() : m_texture(0), m_framebuffer(0), m_mipLevel(0) {
+}
+
+OpenGLRenderTargetView::~OpenGLRenderTargetView() {
+}
+
+bool OpenGLRenderTargetView::Initialize(unsigned int texture, int mipLevel) {
+    m_texture = texture;
+    m_mipLevel = mipLevel;
+
+    glGenFramebuffers(1, &m_framebuffer);
+    glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, mipLevel);
+    
+    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+        return false;
+    }
+    
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    return true;
+}
+
+void OpenGLRenderTargetView::Shutdown() {
+    if (m_framebuffer) {
+        glDeleteFramebuffers(1, &m_framebuffer);
+        m_framebuffer = 0;
+    }
+}
+
+void OpenGLRenderTargetView::Bind(unsigned int slot) {
+    glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
+}
+
+void OpenGLRenderTargetView::Unbind() {
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+} // namespace RHI
+} // namespace XCEngine