Blender如何优雅的使用OpenGL之着色器资源GLShader

着色器资源是渲染管线中必要的资源，在OpenGL中使用着色器对象和程序对象是密不可分的，GLShader类包含这些对象，来看一下它的定义：

namespace blender {
namespace gpu {

/**
 * Implementation of shader compilation and uniforms handling using OpenGL.
 */
class GLShader : public Shader {
  friend shader::ShaderCreateInfo;
  friend shader::StageInterfaceInfo;

 private:
  /** Handle for full program (links shader stages below). */
  GLuint shader_program_ = 0;
  /** Individual shader stages. */
  GLuint vert_shader_ = 0;
  GLuint geom_shader_ = 0;
  GLuint frag_shader_ = 0;
  GLuint compute_shader_ = 0;
  /** True if any shader failed to compile. */
  bool compilation_failed_ = false;

  eGPUShaderTFBType transform_feedback_type_ = GPU_SHADER_TFB_NONE;

 public:
  GLShader(const char *name);
  ~GLShader();

  /** Return true on success. */
  void vertex_shader_from_glsl(MutableSpan<const char *> sources) override;
  void geometry_shader_from_glsl(MutableSpan<const char *> sources) override;
  void fragment_shader_from_g