117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
#include <renderer/rhi/opengl/gl_pipeline.h>
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#include <renderer/rhi/opengl/gl_utils.h>
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namespace extra2d {
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GLPipeline::GLPipeline(const PipelineDesc &desc) : desc_(desc), vao_(0) {}
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GLPipeline::~GLPipeline() { destroy(); }
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bool GLPipeline::create() {
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// 创建 VAO
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glGenVertexArrays(1, &vao_);
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if (vao_ == 0) {
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return false;
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}
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glBindVertexArray(vao_);
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// 配置顶点属性
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const auto &layout = desc_.vertexLayout;
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for (const auto &attr : layout.attributes) {
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glEnableVertexAttribArray(attr.location);
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GLenum type = GL_FLOAT;
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GLint size = 1;
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GLboolean normalized = GL_FALSE;
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switch (attr.format) {
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case VertexFormat::Float1:
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size = 1;
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break;
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case VertexFormat::Float2:
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size = 2;
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break;
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case VertexFormat::Float3:
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size = 3;
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break;
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case VertexFormat::Float4:
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size = 4;
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break;
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default:
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break;
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}
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glVertexAttribPointer(attr.location, size, type, normalized, layout.stride,
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reinterpret_cast<const void *>(attr.offset));
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}
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glBindVertexArray(0);
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return true;
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}
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void GLPipeline::destroy() {
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if (vao_ != 0) {
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glDeleteVertexArrays(1, &vao_);
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vao_ = 0;
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}
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}
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void GLPipeline::bind() {
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// 绑定着色器程序
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if (shaderProgram_ != 0) {
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glUseProgram(shaderProgram_);
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}
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// 注意：VAO 需要与具体的顶点缓冲区绑定才能工作
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// 所以我们不在此处绑定 VAO，而是在渲染时动态配置顶点属性
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// 这样可以支持不同的 Mesh 使用相同的 Pipeline
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// 应用混合状态
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if (desc_.blendState.enabled) {
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glEnable(GL_BLEND);
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glBlendFunc(blendFactorToGL(desc_.blendState.srcFactor),
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blendFactorToGL(desc_.blendState.dstFactor));
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} else {
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glDisable(GL_BLEND);
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}
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// 应用深度状态
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if (desc_.depthStencilState.depthTestEnabled) {
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(compareFuncToGL(desc_.depthStencilState.depthCompare));
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glDepthMask(desc_.depthStencilState.depthWriteEnabled ? GL_TRUE : GL_FALSE);
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} else {
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glDisable(GL_DEPTH_TEST);
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}
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// 应用光栅化状态
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if (desc_.rasterizerState.cullEnabled) {
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glEnable(GL_CULL_FACE);
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glCullFace(desc_.rasterizerState.cullFrontFace ? GL_FRONT : GL_BACK);
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glFrontFace(desc_.rasterizerState.frontCCW ? GL_CCW : GL_CW);
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} else {
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glDisable(GL_CULL_FACE);
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}
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}
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void GLPipeline::unbind() { glBindVertexArray(0); }
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ShaderHandle GLPipeline::getVertexShader() const {
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return desc_.vertexShader;
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}
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ShaderHandle GLPipeline::getFragmentShader() const {
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return desc_.fragmentShader;
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}
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const VertexLayout& GLPipeline::getVertexLayout() const {
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return desc_.vertexLayout;
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}
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bool GLPipeline::isValid() const {
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return vao_ != 0;
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}
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} // namespace extra2d
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