Add OpenGLSampler

2026-03-16 18:52:00 +08:00
parent aee4ae88db
commit 3cd47ea4c8
3 changed files with 132 additions and 0 deletions
--- a/engine/src/RHI/OpenGL/OpenGLSampler.cpp
+++ b/engine/src/RHI/OpenGL/OpenGLSampler.cpp
@@ -0,0 +1,69 @@
+#define GLFW_INCLUDE_NONE
+#include "XCEngine/RHI/OpenGL/OpenGLSampler.h"
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+static unsigned int ToGLWrapMode(SamplerWrapMode mode) {
+    switch (mode) {
+        case SamplerWrapMode::Repeat: return GL_REPEAT;
+        case SamplerWrapMode::MirroredRepeat: return GL_MIRRORED_REPEAT;
+        case SamplerWrapMode::ClampToEdge: return GL_CLAMP_TO_EDGE;
+        case SamplerWrapMode::ClampToBorder: return GL_CLAMP_TO_BORDER;
+        default: return GL_REPEAT;
+    }
+}
+
+static unsigned int ToGLFilter(SamplerFilter filter) {
+    switch (filter) {
+        case SamplerFilter::Nearest: return GL_NEAREST;
+        case SamplerFilter::Linear: return GL_LINEAR;
+        case SamplerFilter::NearestMipmapNearest: return GL_NEAREST_MIPMAP_NEAREST;
+        case SamplerFilter::LinearMipmapNearest: return GL_LINEAR_MIPMAP_NEAREST;
+        case SamplerFilter::NearestMipmapLinear: return GL_NEAREST_MIPMAP_LINEAR;
+        case SamplerFilter::LinearMipmapLinear: return GL_LINEAR_MIPMAP_LINEAR;
+        default: return GL_LINEAR;
+    }
+}
+
+OpenGLSampler::OpenGLSampler() : m_sampler(0) {
+}
+
+OpenGLSampler::~OpenGLSampler() {
+}
+
+bool OpenGLSampler::Initialize(const SamplerDesc& desc) {
+    m_desc = desc;
+    glGenSamplers(1, &m_sampler);
+    
+    glSamplerParameteri(m_sampler, GL_TEXTURE_MIN_FILTER, ToGLFilter(desc.minFilter));
+    glSamplerParameteri(m_sampler, GL_TEXTURE_MAG_FILTER, ToGLFilter(desc.magFilter));
+    glSamplerParameteri(m_sampler, GL_TEXTURE_WRAP_S, ToGLWrapMode(desc.wrapS));
+    glSamplerParameteri(m_sampler, GL_TEXTURE_WRAP_T, ToGLWrapMode(desc.wrapT));
+    glSamplerParameteri(m_sampler, GL_TEXTURE_WRAP_R, ToGLWrapMode(desc.wrapR));
+    glSamplerParameterf(m_sampler, GL_TEXTURE_MIN_LOD, desc.minLod);
+    glSamplerParameterf(m_sampler, GL_TEXTURE_MAX_LOD, desc.maxLod);
+    glSamplerParameterf(m_sampler, GL_TEXTURE_MAX_ANISOTROPY, desc.maxAnisotropy);
+    
+    return true;
+}
+
+void OpenGLSampler::Shutdown() {
+    if (m_sampler) {
+        glDeleteSamplers(1, &m_sampler);
+        m_sampler = 0;
+    }
+}
+
+void OpenGLSampler::Bind(unsigned int unit) {
+    glBindSampler(unit, m_sampler);
+}
+
+void OpenGLSampler::Unbind(unsigned int unit) {
+    glBindSampler(unit, 0);
+}
+
+} // namespace RHI
+} // namespace XCEngine