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// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <tuple>
#include <vector>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/microprofile.h"
#include "video_core/renderer_opengl/gl_device.h"
#include "video_core/renderer_opengl/gl_state_tracker.h"
#include "video_core/renderer_opengl/gl_stream_buffer.h"
MICROPROFILE_DEFINE(OpenGL_StreamBuffer, "OpenGL", "Stream Buffer Orphaning",
MP_RGB(128, 128, 192));
namespace OpenGL {
OGLStreamBuffer::OGLStreamBuffer(const Device& device, StateTracker& state_tracker_)
: state_tracker{state_tracker_} {
gl_buffer.Create();
static constexpr GLbitfield flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT;
glNamedBufferStorage(gl_buffer.handle, BUFFER_SIZE, nullptr, flags);
mapped_ptr = static_cast<u8*>(
glMapNamedBufferRange(gl_buffer.handle, 0, BUFFER_SIZE, flags | GL_MAP_FLUSH_EXPLICIT_BIT));
if (device.UseAssemblyShaders() || device.HasVertexBufferUnifiedMemory()) {
glMakeNamedBufferResidentNV(gl_buffer.handle, GL_READ_ONLY);
glGetNamedBufferParameterui64vNV(gl_buffer.handle, GL_BUFFER_GPU_ADDRESS_NV, &gpu_address);
}
}
OGLStreamBuffer::~OGLStreamBuffer() {
glUnmapNamedBuffer(gl_buffer.handle);
gl_buffer.Release();
}
std::pair<u8*, GLintptr> OGLStreamBuffer::Map(GLsizeiptr size, GLintptr alignment) {
ASSERT(size <= BUFFER_SIZE);
ASSERT(alignment <= BUFFER_SIZE);
mapped_size = size;
if (alignment > 0) {
buffer_pos = Common::AlignUp<std::size_t>(buffer_pos, alignment);
}
if (buffer_pos + size > BUFFER_SIZE) {
MICROPROFILE_SCOPE(OpenGL_StreamBuffer);
glInvalidateBufferData(gl_buffer.handle);
state_tracker.InvalidateStreamBuffer();
buffer_pos = 0;
}
return std::make_pair(mapped_ptr + buffer_pos, buffer_pos);
}
void OGLStreamBuffer::Unmap(GLsizeiptr size) {
ASSERT(size <= mapped_size);
if (size > 0) {
glFlushMappedNamedBufferRange(gl_buffer.handle, buffer_pos, size);
}
buffer_pos += size;
}
} // namespace OpenGL
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