1. rcrnstn/gltexture
  2. include
  3. gltexturebuffer.hpp
Browse code

Add implementation

Robert Cranston authored on 29/12/2021 16:30:02
Showing 1 changed files
include/gltexturebuffer.hpp
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+#ifndef GLTEXTUREBUFFER_HPP_
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+#define GLTEXTUREBUFFER_HPP_
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+
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+
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+#include <string>
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+#include <utility>
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+
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+#include <gltexturend.hpp>
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+
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+
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+/// Class
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+
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+template<typename Data>
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+class GLTextureBuffer : public GLTextureND<1>
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+{
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+public:
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+
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+    /// Special member functions
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+
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+    explicit GLTextureBuffer(
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+        std::string object_label,
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+        Size        size,
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+        GLenum      usage           = GL_STATIC_DRAW,
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+        GLenum      internal_format = DataTraits<Data>::internal_format
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+    );
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+    GLTextureBuffer(GLTextureBuffer && other) noexcept;
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+    virtual ~GLTextureBuffer();
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+
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+    /// Core
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+
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+    GLTextureBuffer static const & empty();
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+
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+    GLOBJECT_GET(GLuint, buffer)
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+
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+protected:
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+
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+    /// Core
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+
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+    void data_(
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+        void const * data,
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+        GLenum       target,
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+        GLenum       format,
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+        GLenum       type
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+    ) override;
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+
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+    GLsizeiptr buffer_size_() const;
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+
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+private:
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+
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+    /// Core
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+
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+    GLuint buffer_;
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+};
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+
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+
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+/// Special member functions
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+
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+template<typename Data>
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+inline GLTextureBuffer<Data>::GLTextureBuffer(
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+    std::string object_label,
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+    Size        size,
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+    GLenum      usage,
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+    GLenum      internal_format
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+)
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+:
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+    GLTextureND(
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+        std::move(object_label),
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+        GL_TEXTURE_BUFFER,
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+        GL_TEXTURE_BINDING_BUFFER,
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+        GL_MAX_TEXTURE_BUFFER_SIZE,
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+        size,
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+        internal_format
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+    ),
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+    buffer_{0}
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+{
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+    try
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+    {
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+        check_supported_({3, 1}, "GL_ARB_texture_buffer_object");
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+        switch (internal_format)
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+        {
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+            case GL_RGB32F:
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+            case GL_RGB32I:
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+            case GL_RGB32UI:
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+                check_supported_({4, 0}, "GL_ARB_texture_buffer_object_rgb32");
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+        }
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+        glGenBuffers(1, &buffer_);
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+        glBindBuffer(GL_TEXTURE_BUFFER, buffer_);
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+        glBufferData(
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+            GL_TEXTURE_BUFFER,
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+            buffer_size_(),
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+            nullptr,
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+            usage
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+        );
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+        glTexBuffer(target_, internal_format, buffer_);
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+        check_error_(glGetError());
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+    }
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+    catch (...)
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+    {
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+        glDeleteBuffers(1, &buffer_);
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+        fail_action_("create");
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+    }
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+}
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+
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+template<typename Data>
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+inline GLTextureBuffer<Data>::GLTextureBuffer(
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+    GLTextureBuffer && other
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+) noexcept
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+:
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+    buffer_{other.buffer_}
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+{
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+    other.buffer_ = 0;
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+}
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+
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+template<typename Data>
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+inline GLTextureBuffer<Data>::~GLTextureBuffer()
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+{
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+    glDeleteBuffers(1, &buffer_);
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+}
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+
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+/// Core
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+
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+template<typename Data>
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+inline GLTextureBuffer<Data> const & GLTextureBuffer<Data>::empty()
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+{
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+    return empty_<GLTextureBuffer>();
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+}
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+
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+template<typename Data>
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+inline void GLTextureBuffer<Data>::data_(
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+    void const * data,
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+    GLenum       target,
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+    GLenum       format,
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+    GLenum       type
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+)
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+{
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+    check_format_(format, DataTraits<Data>::format);
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+    check_type_  (type,   DataTraits<Data>::type);
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+    glBufferSubData(
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+        target,
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+        0,
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+        buffer_size_(),
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+        data
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+    );
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+}
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+
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+template<typename Data>
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+inline GLsizeiptr GLTextureBuffer<Data>::buffer_size_() const
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+{
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+    return (GLsizeiptr)(data_size_() * sizeof(Data));
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+}
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+
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+
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+#endif // GLTEXTUREBUFFER_HPP_