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Use std::span to pass vertex data

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Starts utilizing
[std::span](https://en.cppreference.com/w/cpp/container/span) to
indicate a non-owning view of a contiguous array of elements rather than
`T* data, usize count`.
This commit is contained in:
Wunkolo 2023-06-16 07:28:35 -07:00
parent c6f5d19983
commit 553d23974a
5 changed files with 32 additions and 24 deletions
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23
include/opengl.hpp
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@ -23,6 +23,7 @@
#include <functional>
#include <initializer_list>
#include <iostream>
#include <span>
#include <stdexcept>
#include <string_view>
#include <type_traits>
@ -388,18 +389,18 @@ namespace OpenGL {
void bind() { glBindBuffer(GL_ARRAY_BUFFER, m_handle); }
void free() { glDeleteBuffers(1, &m_handle); }
// Reallocates the buffer on every call. Prefer the sub version if possible.
template <typename VertType>
void bufferVerts(VertType* vertices, int vertCount, GLenum usage = GL_DYNAMIC_DRAW) {
glBufferData(GL_ARRAY_BUFFER, sizeof(VertType) * vertCount, vertices, usage);
}
// Reallocates the buffer on every call. Prefer the sub version if possible.
template <typename VertType>
void bufferVerts(std::span<const VertType> vertices, GLenum usage = GL_DYNAMIC_DRAW) {
glBufferData(GL_ARRAY_BUFFER, sizeof(VertType) * vertices.size(), vertices.data(), usage);
}
// Only use if you used createFixedSize
template <typename VertType>
void bufferVertsSub(VertType* vertices, int vertCount, GLintptr offset = 0) {
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(VertType) * vertCount, vertices);
}
};
// Only use if you used createFixedSize
template <typename VertType>
void bufferVertsSub(std::span<const VertType> vertices, GLintptr offset = 0) {
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(VertType) * vertices.size(), vertices.data());
}
};
enum DepthFunc {
Never = GL_NEVER, // Depth test never passes