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add a map range option to ogl (instance) buffer

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This commit is contained in:
Green Sky
2021-10-20 02:51:53 +02:00
parent 8e74256670
commit 5d74c3298d
3 changed files with 22 additions and 16 deletions
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1
framework/opengl_primitives/src/mm/opengl/frame_buffer_object.cpp
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@ -24,6 +24,7 @@ void FrameBufferObject::bind(Target target) const {
}
}
// TODO: refactor, make depth and stencil set-able
void FrameBufferObject::clear(float r, float g, float b, float a, GLbitfield target_mask) {
bind(FrameBufferObject::RW);

31
framework/opengl_primitives/src/mm/opengl/instance_buffer.hpp
View File

@ -19,7 +19,7 @@ namespace MM::OpenGL {
class InstanceBuffer {
private:
GLuint _handle;
size_t _size;
std::size_t _size;
public:
explicit InstanceBuffer(void) : _handle(0), _size(0) {
@ -43,21 +43,21 @@ namespace MM::OpenGL {
glBindBufferBase(target, index, _handle);
}
void resize(size_t size, GLenum usage) {
void resize(std::size_t size, GLenum usage) {
glBindBuffer(GL_ARRAY_BUFFER, _handle);
glBufferData(GL_ARRAY_BUFFER, size * sizeof(TInstance), nullptr, usage);
_size = size;
}
size_t getSize(void) const {
std::size_t getSize(void) const {
return _size;
}
size_t getSizeBytes(void) const {
std::size_t getSizeBytes(void) const {
return _size * sizeof(TInstance);
}
TInstance* map(size_t size, GLenum usage = GL_DYNAMIC_DRAW, bool shrink = false) {
TInstance* map(std::size_t size, GLenum usage = GL_DYNAMIC_DRAW, bool shrink = false) {
if (size > _size || (shrink && (size < _size)))
resize(size, usage);
@ -71,12 +71,21 @@ namespace MM::OpenGL {
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT
)
);
//auto* res = static_cast<TInstance*>(
//glMapBuffer(
//GL_ARRAY_BUFFER,
//GL_WRITE_ONLY
//)
//);
return res;
}
TInstance* mapRange(std::size_t offset, std::size_t size, GLbitfield access = GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT) {
glBindBuffer(GL_ARRAY_BUFFER, _handle);
auto* res = static_cast<TInstance*>(
glMapBufferRange(
GL_ARRAY_BUFFER,
offset * sizeof(TInstance),
size * sizeof(TInstance),
access
)
);
return res;
}