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Add UBO support to opengl.hpp

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wheremyfoodat 2024-05-13 01:10:44 +03:00 • committed by GitHub
parent 2cf4563533
commit 85a17c3fcd
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1 changed files with 68 additions and 26 deletions
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94
third_party/opengl/opengl.hpp vendored
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@ -430,36 +430,36 @@ namespace OpenGL {
glDispatchCompute(groupsX, groupsY, groupsZ); glDispatchCompute(groupsX, groupsY, groupsZ);
} }
struct VertexBuffer { struct VertexBuffer {
GLuint m_handle = 0; GLuint m_handle = 0;
void create() { void create() {
if (m_handle == 0) { if (m_handle == 0) {
glGenBuffers(1, &m_handle); glGenBuffers(1, &m_handle);
} }
} }
void createFixedSize(GLsizei size, GLenum usage = GL_DYNAMIC_DRAW) { void createFixedSize(GLsizei size, GLenum usage = GL_DYNAMIC_DRAW) {
create(); create();
bind(); bind();
glBufferData(GL_ARRAY_BUFFER, size, nullptr, usage); glBufferData(GL_ARRAY_BUFFER, size, nullptr, usage);
} }
VertexBuffer(bool shouldCreate = false) { VertexBuffer(bool shouldCreate = false) {
if (shouldCreate) { if (shouldCreate) {
create(); create();
} }
} }
#ifdef OPENGL_DESTRUCTORS #ifdef OPENGL_DESTRUCTORS
~VertexBuffer() { free(); } ~VertexBuffer() { free(); }
#endif #endif
GLuint handle() const { return m_handle; } GLuint handle() const { return m_handle; }
bool exists() const { return m_handle != 0; } bool exists() const { return m_handle != 0; }
void bind() const { glBindBuffer(GL_ARRAY_BUFFER, m_handle); } void bind() const { glBindBuffer(GL_ARRAY_BUFFER, m_handle); }
void free() { glDeleteBuffers(1, &m_handle); } void free() { glDeleteBuffers(1, &m_handle); }
// Reallocates the buffer on every call. Prefer the sub version if possible. // Reallocates the buffer on every call. Prefer the sub version if possible.
template <typename VertType> template <typename VertType>
void bufferVerts(VertType* vertices, int vertCount, GLenum usage = GL_DYNAMIC_DRAW) { void bufferVerts(VertType* vertices, int vertCount, GLenum usage = GL_DYNAMIC_DRAW) {
glBufferData(GL_ARRAY_BUFFER, sizeof(VertType) * vertCount, vertices, usage); glBufferData(GL_ARRAY_BUFFER, sizeof(VertType) * vertCount, vertices, usage);
@ -471,7 +471,7 @@ namespace OpenGL {
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(VertType) * vertCount, vertices); glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(VertType) * vertCount, vertices);
} }
// If C++20 is available, add overloads that take std::span instead of raw pointers // If C++20 is available, add overloads that take std::span instead of raw pointers
#ifdef OPENGL_HAVE_CPP20 #ifdef OPENGL_HAVE_CPP20
template <typename VertType> template <typename VertType>
void bufferVerts(std::span<const VertType> vertices, GLenum usage = GL_DYNAMIC_DRAW) { void bufferVerts(std::span<const VertType> vertices, GLenum usage = GL_DYNAMIC_DRAW) {
@ -485,6 +485,48 @@ namespace OpenGL {
#endif #endif
}; };
struct UniformBuffer {
GLuint m_handle = 0;
void create() {
if (m_handle == 0) {
glGenBuffers(1, &m_handle);
}
}
void createFixedSize(GLsizei size, GLenum usage = GL_DYNAMIC_DRAW) {
create();
bind();
glBufferData(GL_UNIFORM_BUFFER, size, nullptr, usage);
}
UniformBuffer(bool shouldCreate = false) {
if (shouldCreate) {
create();
}
}
#ifdef OPENGL_DESTRUCTORS
~UniformBuffer() { free(); }
#endif
GLuint handle() const { return m_handle; }
bool exists() const { return m_handle != 0; }
void bind() const { glBindBuffer(GL_UNIFORM_BUFFER, m_handle); }
void free() { glDeleteBuffers(1, &m_handle); }
// Reallocates the buffer on every call. Prefer the sub version if possible.
template <typename UniformType>
void buffer(const UniformType& uniformData, GLenum usage = GL_DYNAMIC_DRAW) {
glBufferData(GL_UNIFORM_BUFFER, sizeof(uniformData), &uniformData, usage);
}
// Only use if you used createFixedSize
template <typename UniformType>
void bufferSub(const UniformType& uniformData, int vertCount, GLintptr offset = 0) {
glBufferSubData(GL_UNIFORM_BUFFER, offset, sizeof(uniformData), &uniformData);
}
};
enum DepthFunc { enum DepthFunc {
Never = GL_NEVER, // Depth test never passes Never = GL_NEVER, // Depth test never passes
Always = GL_ALWAYS, // Depth test always passes Always = GL_ALWAYS, // Depth test always passes
@ -693,4 +735,4 @@ namespace OpenGL {
using Rect = Rectangle<GLuint>; using Rect = Rectangle<GLuint>;
} // end namespace OpenGL } // end namespace OpenGL