mirror of
https://github.com/SerenityOS/serenity.git
synced 2026-11-07 04:29:30 -10:00
Sönke Holz
7e510d374a
This initial version of the driver only supports glClear{,Color,Depth}()
for now.
Since the only publicly available documentation for the VideoCore 3D
architecture (the VideoCore IV 3D Architecture Reference Guide) just
covers an older revision of the VideoCore 3D architecture, I used
Mesa's v3d_packet.xml as a reference to get definitions for the control
records of the VideoCore VII.
To determine which control records need to be generated for a minimal
example, I used Mesa's `V3D_DEBUG` environment variable and set it to
`cl` to make it dump the control lists it generates for a basic OpenGL
test program.
61 lines
1.2 KiB
C++
61 lines
1.2 KiB
C++
/*
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* Copyright (c) 2025, Sönke Holz <[email protected]>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Buffer.h"
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#include "Definitions.h"
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#include <AK/ByteBuffer.h>
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#include <AK/Error.h>
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#include <AK/Span.h>
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#include <AK/Types.h>
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namespace V3DGPU {
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class ControlList {
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public:
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template<typename T>
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void append(T const& packet)
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{
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m_data.try_append(&packet, sizeof(packet)).release_value_but_fixme_should_propagate_errors();
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}
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void clear()
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{
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m_data.clear();
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}
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ReadonlyBytes data() const
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{
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return m_data.bytes();
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}
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ErrorOr<void> copy_to_gpu_buffer()
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{
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if (!m_buffer.has_value() || m_buffer->size() < m_data.size()) {
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auto buffer_size = align_up_to(m_data.size(), V3D_PAGE_SIZE);
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m_buffer = TRY(Buffer::create(buffer_size, "LibV3DGPU: Control List"sv));
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}
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m_data.bytes().copy_to(m_buffer->data());
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return {};
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}
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Optional<Buffer const&> buffer() const
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{
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VERIFY(m_buffer.has_value());
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return *m_buffer;
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}
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private:
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AK::Detail::ByteBuffer<0> m_data;
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Optional<Buffer> m_buffer;
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};
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}
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