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Demos: Remove VirGLDemo

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All interesting code from the demo now lives in LibVirtGPU.
This commit is contained in:
Stephan Unverwerth 2022-12-22 15:24:34 +01:00 committed by Andreas Kling
parent 07053d32dd
commit 60c9e3bfc6
Notes: sideshowbarker 2024-07-18 05:01:22 +09:00 
Author: https://github.com/sunverwerth
Commit: https://github.com/SerenityOS/serenity/commit/60c9e3bfc6
Pull-request: https://github.com/SerenityOS/serenity/pull/16590
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/ccapitalK
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/supercomputer7 ✅
8 changed files with 0 additions and 975 deletions
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1
Userland/Demos/CMakeLists.txt
View file

@ -10,5 +10,4 @@ add_subdirectory(Mouse)
add_subdirectory(Screensaver)
add_subdirectory(Starfield)
add_subdirectory(Tubes)
add_subdirectory(VirGLDemo)
add_subdirectory(WidgetGallery)

13
Userland/Demos/VirGLDemo/CMakeLists.txt
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@ -1,13 +0,0 @@
serenity_component(
VirGLDemo
TARGETS VirGLDemo
)
set(SOURCES
CommandBufferBuilder.cpp
VirGLDemo.cpp
Widget.cpp
)
serenity_app(VirGLDemo ICON app-cube)
target_link_libraries(VirGLDemo PRIVATE LibCore LibMain LibGfx LibGUI)

293
Userland/Demos/VirGLDemo/CommandBufferBuilder.cpp
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@ -1,293 +0,0 @@
/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringView.h>
#include <Kernel/API/VirGL.h>
#include <sys/ioctl_numbers.h>
#include "CommandBufferBuilder.h"
#include "VirGLProtocol.h"
#include "Widget.h"
static u32 encode_command(u32 length, u32 mid, Protocol::VirGLCommand command)
{
u32 command_value = to_underlying(command);
return (length << 16) | ((mid & 0xff) << 8) | (command_value & 0xff);
};
class CommandBuilder {
public:
CommandBuilder() = delete;
CommandBuilder(Vector<u32>& buffer, Protocol::VirGLCommand command, u32 mid)
: m_buffer(buffer)
, m_start_offset(buffer.size())
, m_command(command)
, m_command_mid(mid)
{
m_buffer.append(0);
}
void appendu32(u32 value)
{
VERIFY(!m_finalized);
m_buffer.append(value);
}
void appendf32(float value)
{
VERIFY(!m_finalized);
m_buffer.append(bit_cast<u32>(value));
}
void appendf64(double value)
{
VERIFY(!m_finalized);
m_buffer.append(0);
m_buffer.append(0);
auto* depth = (u64*)(&m_buffer[m_buffer.size() - 2]);
*depth = bit_cast<u64>(value);
}
void append_string_null_padded(StringView string)
{
VERIFY(!m_finalized);
// Remember to have at least one null terminator byte
auto length = string.length() + 1;
auto num_required_words = (length + sizeof(u32) - 1) / sizeof(u32);
m_buffer.resize(m_buffer.size() + num_required_words);
char* dest = (char*)&m_buffer[m_buffer.size() - num_required_words];
memcpy(dest, string.characters_without_null_termination(), string.length());
// Pad end with null bytes
memset(&dest[string.length()], 0, 4 * num_required_words - string.length());
}
void finalize()
{
if (!m_finalized) {
m_finalized = true;
size_t num_elems = m_buffer.size() - m_start_offset - 1;
m_buffer[m_start_offset] = encode_command(num_elems, m_command_mid, m_command);
}
}
~CommandBuilder()
{
if (!m_finalized)
finalize();
}
private:
Vector<u32>& m_buffer;
size_t m_start_offset;
Protocol::VirGLCommand m_command;
u32 m_command_mid;
bool m_finalized { false };
};
void CommandBufferBuilder::append_set_tweaks(u32 id, u32 value)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_TWEAKS, 0);
builder.appendu32(id);
builder.appendu32(value);
}
void CommandBufferBuilder::append_transfer3d(ResourceID resource, size_t width, size_t height, size_t depth, size_t direction)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::TRANSFER3D, 0);
builder.appendu32(resource.value()); // res_handle
builder.appendu32(0); // level
builder.appendu32(242); // usage
builder.appendu32(0); // stride
builder.appendu32(0); // layer_stride
builder.appendu32(0); // x
builder.appendu32(0); // y
builder.appendu32(0); // z
builder.appendu32(width); // width
builder.appendu32(height); // height
builder.appendu32(depth); // depth
builder.appendu32(0); // data_offset
builder.appendu32(direction); // direction
}
void CommandBufferBuilder::append_end_transfers_3d()
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::END_TRANSFERS, 0);
}
void CommandBufferBuilder::append_draw_vbo(u32 count)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::DRAW_VBO, 0);
builder.appendu32(0); // start
builder.appendu32(count); // count
builder.appendu32(to_underlying(Protocol::PipePrimitiveTypes::TRIANGLES)); // mode
builder.appendu32(0); // indexed
builder.appendu32(1); // instance_count
builder.appendu32(0); // index_bias
builder.appendu32(0); // start_instance
builder.appendu32(0); // primitive_restart
builder.appendu32(0); // restart_index
builder.appendu32(0); // min_index
builder.appendu32(0xffffffff); // max_index
builder.appendu32(0); // cso
}
void CommandBufferBuilder::append_gl_clear(float r, float g, float b)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CLEAR, 0);
Protocol::ClearType clear_flags {};
clear_flags.flags.depth = 1;
clear_flags.flags.color0 = 1;
builder.appendu32(clear_flags.value);
builder.appendf32(r);
builder.appendf32(g);
builder.appendf32(b);
builder.appendf32(1.0f); // Alpha
builder.appendf64(1.0); // Depth
builder.appendu32(0); // Stencil
}
void CommandBufferBuilder::append_set_vertex_buffers(u32 stride, u32 offset, ResourceID resource)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_VERTEX_BUFFERS, 0);
builder.appendu32(stride);
builder.appendu32(offset);
builder.appendu32(resource.value());
}
void CommandBufferBuilder::append_create_blend(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::BLEND));
builder.appendu32(handle.value());
builder.appendu32(4); // Enable dither flag, and nothing else
builder.appendu32(0);
builder.appendu32(0x78000000); // Enable all bits of color mask for color buffer 0, and nothing else
for (size_t i = 1; i < 8; ++i) {
builder.appendu32(0); // Explicitly disable all flags for other color buffers
}
}
void CommandBufferBuilder::append_bind_blend(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::BIND_OBJECT, to_underlying(Protocol::ObjectType::BLEND));
builder.appendu32(handle.value()); // VIRGL_OBJ_BIND_HANDLE
}
void CommandBufferBuilder::append_create_vertex_elements(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::VERTEX_ELEMENTS));
builder.appendu32(handle.value());
builder.appendu32(12); // src_offset_0
builder.appendu32(0); // instance_divisor_0
builder.appendu32(0); // vertex_buffer_index_0
builder.appendu32(30); // src_format_0 (PIPE_FORMAT_R32G32B32_FLOAT = 30)
builder.appendu32(0); // src_offset_1
builder.appendu32(0); // instance_divisor_1
builder.appendu32(0); // vertex_buffer_index_1
builder.appendu32(30); // src_format_1 (PIPE_FORMAT_R32G32B32_FLOAT = 30)
}
void CommandBufferBuilder::append_bind_vertex_elements(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::BIND_OBJECT, to_underlying(Protocol::ObjectType::VERTEX_ELEMENTS));
builder.appendu32(handle.value()); // VIRGL_OBJ_BIND_HANDLE
}
void CommandBufferBuilder::append_create_surface(ResourceID drawtarget_resource, ObjectHandle drawtarget_handle, Protocol::TextureFormat format)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::SURFACE));
builder.appendu32(drawtarget_handle.value());
builder.appendu32(drawtarget_resource.value());
builder.appendu32(to_underlying(format));
builder.appendu32(0); // First element / Texture Level
builder.appendu32(0); // Last element / Texture Element
}
void CommandBufferBuilder::append_set_framebuffer_state(ObjectHandle drawtarget, ObjectHandle depthbuffer)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_FRAMEBUFFER_STATE, 0);
builder.appendu32(1); // nr_cbufs
builder.appendu32(depthbuffer.value()); // zsurf_handle
builder.appendu32(drawtarget.value()); // surf_handle
}
void CommandBufferBuilder::append_gl_viewport()
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_VIEWPORT_STATE, 0);
builder.appendu32(0);
builder.appendf32(DRAWTARGET_WIDTH / 2); // scale_x
builder.appendf32((DRAWTARGET_HEIGHT / 2)); // scale_y (flipped, due to VirGL being different from our coordinate space)
builder.appendf32(0.5f); // scale_z
builder.appendf32(DRAWTARGET_WIDTH / 2); // translate_x
builder.appendf32(DRAWTARGET_HEIGHT / 2); // translate_y
builder.appendf32(0.5f); // translate_z
}
void CommandBufferBuilder::append_set_framebuffer_state_no_attach()
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_FRAMEBUFFER_STATE_NO_ATTACH, 0);
builder.appendu32((DRAWTARGET_HEIGHT << 16) | DRAWTARGET_WIDTH); // (height << 16) | width
builder.appendu32(0); // (samples << 16) | layers
}
void CommandBufferBuilder::append_set_constant_buffer(Vector<float> const& constant_buffer)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::SET_CONSTANT_BUFFER, 0);
builder.appendu32(to_underlying(Gallium::ShaderType::SHADER_VERTEX));
builder.appendu32(0); // index (currently unused according to virglrenderer source code)
for (auto v : constant_buffer) {
builder.appendf32(v);
}
}
void CommandBufferBuilder::append_create_shader(ObjectHandle handle, Gallium::ShaderType shader_type, StringView shader_data)
{
size_t shader_len = shader_data.length() + 1; // Need to remember to copy null terminator as well if needed
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::SHADER));
builder.appendu32(handle.value()); // VIRGL_OBJ_CREATE_HANDLE
builder.appendu32(to_underlying(shader_type));
builder.appendu32(0); // VIRGL_OBJ_SHADER_OFFSET
builder.appendu32(shader_len);
builder.appendu32(0); // VIRGL_OBJ_SHADER_NUM_TOKENS
builder.append_string_null_padded(shader_data);
}
void CommandBufferBuilder::append_bind_shader(ObjectHandle handle, Gallium::ShaderType shader_type)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::BIND_SHADER, 0);
builder.appendu32(handle.value()); // VIRGL_OBJ_BIND_HANDLE
builder.appendu32(to_underlying(shader_type));
}
void CommandBufferBuilder::append_create_rasterizer(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::RASTERIZER));
builder.appendu32(handle.value()); // Handle
builder.appendu32(0x00000002); // S0 (bitfield of state bits)
builder.appendf32(1.0); // Point size
builder.appendu32(0); // Sprite coord enable
builder.appendu32(0x00000000); // S3 (bitfield of state bits)
builder.appendf32(0.1); // Line width
builder.appendf32(0.0); // Offset units
builder.appendf32(0.0); // offset scale
builder.appendf32(0.0); // Offset clamp
}
void CommandBufferBuilder::append_bind_rasterizer(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::BIND_OBJECT, to_underlying(Protocol::ObjectType::RASTERIZER));
builder.appendu32(handle.value()); // VIRGL_OBJ_BIND_HANDLE
}
void CommandBufferBuilder::append_create_dsa(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::CREATE_OBJECT, to_underlying(Protocol::ObjectType::DSA));
builder.appendu32(handle.value()); // Handle
builder.appendu32(0x00000007); // S0 (bitset: (v >> 0) & 1 = depth.enabled, (v >> 1) & 1 = depth.writemask, (v >> 2) & 7 = depth.func)
builder.appendu32(0x00000000); // S1 (bitset for 1st stencil buffer)
builder.appendu32(0x00000000); // S2 (bitset for 2nd stencil buffer)
builder.appendf32(1.0); // Alpha Ref
}
void CommandBufferBuilder::append_bind_dsa(ObjectHandle handle)
{
CommandBuilder builder(m_buffer, Protocol::VirGLCommand::BIND_OBJECT, to_underlying(Protocol::ObjectType::DSA));
builder.appendu32(handle.value()); // VIRGL_OBJ_BIND_HANDLE
}

43
Userland/Demos/VirGLDemo/CommandBufferBuilder.h
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@ -1,43 +0,0 @@
/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/StringView.h>
#include <AK/Vector.h>
#include <sys/ioctl_numbers.h>
#include "VirGLProtocol.h"
class CommandBufferBuilder {
public:
void append_set_tweaks(u32 id, u32 value);
void append_transfer3d(ResourceID resource, size_t width, size_t height = 1, size_t depth = 1, size_t direction = VIRGL_DATA_DIR_GUEST_TO_HOST);
void append_end_transfers_3d();
void append_draw_vbo(u32 count);
void append_gl_clear(float r, float g, float b);
void append_set_vertex_buffers(u32 stride, u32 offset, ResourceID resource);
void append_create_blend(ObjectHandle handle);
void append_bind_blend(ObjectHandle handle);
void append_create_surface(ResourceID drawtarget_resource, ObjectHandle drawtarget_handle, Protocol::TextureFormat format);
void append_set_framebuffer_state(ObjectHandle drawtarget, ObjectHandle depthbuffer = 0);
void append_create_vertex_elements(ObjectHandle handle);
void append_bind_vertex_elements(ObjectHandle handle);
void append_gl_viewport();
void append_set_framebuffer_state_no_attach();
void append_set_constant_buffer(Vector<float> const& constant_buffer);
void append_create_shader(ObjectHandle handle, Gallium::ShaderType shader_type, StringView shader_data);
void append_bind_shader(ObjectHandle handle, Gallium::ShaderType shader_type);
void append_create_rasterizer(ObjectHandle handle);
void append_bind_rasterizer(ObjectHandle handle);
void append_create_dsa(ObjectHandle handle);
void append_bind_dsa(ObjectHandle handle);
Vector<u32> const& build() { return m_buffer; }
private:
Vector<u32> m_buffer;
};

329
Userland/Demos/VirGLDemo/VirGLDemo.cpp
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@ -1,329 +0,0 @@
/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Array.h>
#include <AK/DeprecatedString.h>
#include <AK/StringView.h>
#include <AK/Vector.h>
#include <Kernel/API/VirGL.h>
#include <LibGUI/Application.h>
#include <LibGUI/Icon.h>
#include <LibGUI/Window.h>
#include <LibGfx/Matrix4x4.h>
#include <LibMain/Main.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/ioctl_numbers.h>
#include <unistd.h>
#include "CommandBufferBuilder.h"
#include "VirGLProtocol.h"
#include "Widget.h"
static constexpr auto frag_shader = "FRAG\n"
"PROPERTY FS_COLOR0_WRITES_ALL_CBUFS 1\n"
"DCL IN[0], COLOR, COLOR\n"
"DCL OUT[0], COLOR\n"
" 0: MOV OUT[0], IN[0]\n"
" 1: END\n"sv;
static constexpr auto vert_shader = "VERT\n"
"DCL IN[0]\n"
"DCL IN[1]\n"
"DCL OUT[0], POSITION\n"
"DCL OUT[1], COLOR\n"
"DCL CONST[0..3]\n"
"DCL TEMP[0..1]\n"
" 0: MUL TEMP[0], IN[0].xxxx, CONST[0]\n"
" 1: MAD TEMP[1], IN[0].yyyy, CONST[1], TEMP[0]\n"
" 2: MAD TEMP[0], IN[0].zzzz, CONST[2], TEMP[1]\n"
" 3: MAD OUT[0], IN[0].wwww, CONST[3], TEMP[0]\n"
" 4: MOV_SAT OUT[1], IN[1]\n"
" 5: END\n"sv;
struct VertexData {
float r;
float g;
float b;
float x;
float y;
float z;
};
int gpu_fd;
ResourceID vbo_resource_id;
ResourceID drawtarget;
ResourceID depthbuffer_surface;
ObjectHandle blend_handle;
ObjectHandle drawtarget_surface_handle;
ObjectHandle depthbuffer_surface_handle;
ObjectHandle ve_handle;
ObjectHandle frag_shader_handle;
ObjectHandle vert_shader_handle;
ObjectHandle rasterizer_handle;
ObjectHandle dsa_handle;
Vector<VertexData> g_vertices;
static ObjectHandle allocate_handle()
{
static u32 last_allocated_handle = 0;
return { ++last_allocated_handle };
}
static void upload_command_buffer(Vector<u32> const& command_buffer)
{
VERIFY(command_buffer.size() <= NumericLimits<u32>::max());
VirGLCommandBuffer command_buffer_descriptor {
.data = command_buffer.data(),
.num_elems = (u32)command_buffer.size(),
};
VERIFY(ioctl(gpu_fd, VIRGL_IOCTL_SUBMIT_CMD, &command_buffer_descriptor) >= 0);
}
static ResourceID create_virgl_resource(VirGL3DResourceSpec& spec)
{
VERIFY(ioctl(gpu_fd, VIRGL_IOCTL_CREATE_RESOURCE, &spec) >= 0);
return spec.created_resource_id;
}
static Vector<VertexData> gen_vertex_data()
{
Vector<VertexData> data;
static constexpr Array<VertexData, 8> vertices = {
VertexData { .r = 0, .g = 0, .b = 0, .x = -0.5, .y = -0.5, .z = -0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = 0.5, .y = -0.5, .z = -0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = -0.5, .y = 0.5, .z = -0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = 0.5, .y = 0.5, .z = -0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = -0.5, .y = -0.5, .z = 0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = 0.5, .y = -0.5, .z = 0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = -0.5, .y = 0.5, .z = 0.5 },
VertexData { .r = 0, .g = 0, .b = 0, .x = 0.5, .y = 0.5, .z = 0.5 },
};
static constexpr Array<size_t, 36> tris = {
0, 1, 2, 1, 3, 2, // Top
4, 0, 6, 0, 2, 6, // Left
4, 5, 0, 5, 1, 0, // Up
1, 5, 3, 5, 7, 3, // Right
2, 3, 6, 3, 7, 6, // Down
5, 4, 7, 4, 6, 7, // Bottom
};
for (auto index : tris) {
data.append(vertices[index]);
}
// Choose random colors for each face of the cube
for (auto i = 0; i < 6; ++i) {
float red = (rand() % 256) / 255.f;
float green = (rand() % 256) / 255.f;
float blue = (rand() % 256) / 255.f;
for (auto j = 0; j < 6; ++j) {
auto& vertex = data[i * 6 + j];
vertex.r = red;
vertex.g = green;
vertex.b = blue;
}
}
return data;
}
static void init()
{
// Open the device
gpu_fd = open("/dev/gpu/render0", O_RDWR);
VERIFY(gpu_fd >= 0);
// Create a virgl context for this file descriptor
VERIFY(ioctl(gpu_fd, VIRGL_IOCTL_CREATE_CONTEXT) >= 0);
// Create a VertexElements resource
VirGL3DResourceSpec vbo_spec {
.target = to_underlying(Gallium::PipeTextureTarget::BUFFER), // pipe_texture_target
.format = 45, // pipe_to_virgl_format
.bind = VIRGL_BIND_VERTEX_BUFFER,
.width = PAGE_SIZE,
.height = 1,
.depth = 1,
.array_size = 1,
.last_level = 0,
.nr_samples = 0,
.flags = 0,
.created_resource_id = 0,
};
vbo_resource_id = create_virgl_resource(vbo_spec);
// Create a texture to draw to
VirGL3DResourceSpec drawtarget_spec {
.target = to_underlying(Gallium::PipeTextureTarget::TEXTURE_RECT), // pipe_texture_target
.format = to_underlying(Protocol::TextureFormat::VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM), // pipe_to_virgl_format
.bind = VIRGL_BIND_RENDER_TARGET,
.width = DRAWTARGET_WIDTH,
.height = DRAWTARGET_HEIGHT,
.depth = 1,
.array_size = 1,
.last_level = 0,
.nr_samples = 0,
.flags = 0,
.created_resource_id = 0,
};
drawtarget = create_virgl_resource(drawtarget_spec);
// Create a depthbuffer surface
VirGL3DResourceSpec depthbuffer_surface_spec {
.target = to_underlying(Gallium::PipeTextureTarget::TEXTURE_RECT), // pipe_texture_target
.format = to_underlying(Protocol::TextureFormat::VIRTIO_GPU_FORMAT_Z32_FLOAT), // pipe_to_virgl_format
.bind = VIRGL_BIND_RENDER_TARGET | VIRGL_BIND_DEPTH_STENCIL,
.width = DRAWTARGET_WIDTH,
.height = DRAWTARGET_HEIGHT,
.depth = 1,
.array_size = 1,
.last_level = 0,
.nr_samples = 0,
.flags = 0,
.created_resource_id = 0,
};
depthbuffer_surface = create_virgl_resource(depthbuffer_surface_spec);
// Initialize all required state
CommandBufferBuilder builder;
// Create and set the blend, to control the color mask
blend_handle = allocate_handle();
builder.append_create_blend(blend_handle);
builder.append_bind_blend(blend_handle);
// Create drawtarget surface
drawtarget_surface_handle = allocate_handle();
builder.append_create_surface(drawtarget, drawtarget_surface_handle, Protocol::TextureFormat::VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM);
// Create depthbuffer surface
depthbuffer_surface_handle = allocate_handle();
builder.append_create_surface(depthbuffer_surface, depthbuffer_surface_handle, Protocol::TextureFormat::VIRTIO_GPU_FORMAT_Z32_FLOAT);
// Set some framebuffer state (attached handle, framebuffer size, etc)
builder.append_set_framebuffer_state(drawtarget_surface_handle, depthbuffer_surface_handle);
builder.append_set_framebuffer_state_no_attach();
// Set the vertex buffer
builder.append_set_vertex_buffers(sizeof(VertexData), 0, vbo_resource_id);
// Create and bind fragment shader
frag_shader_handle = allocate_handle();
builder.append_create_shader(frag_shader_handle, Gallium::ShaderType::SHADER_FRAGMENT, frag_shader);
builder.append_bind_shader(frag_shader_handle, Gallium::ShaderType::SHADER_FRAGMENT);
// Create and bind vertex shader
vert_shader_handle = allocate_handle();
builder.append_create_shader(vert_shader_handle, Gallium::ShaderType::SHADER_VERTEX, vert_shader);
builder.append_bind_shader(vert_shader_handle, Gallium::ShaderType::SHADER_VERTEX);
// Create a VertexElements object (used to specify layout of vertex data)
ve_handle = allocate_handle();
builder.append_create_vertex_elements(ve_handle);
builder.append_bind_vertex_elements(ve_handle);
// Create a DepthStencilAlpha (DSA) object
dsa_handle = allocate_handle();
builder.append_create_dsa(dsa_handle);
builder.append_bind_dsa(dsa_handle);
// Create a Rasterizer object
rasterizer_handle = allocate_handle();
builder.append_create_rasterizer(rasterizer_handle);
builder.append_bind_rasterizer(rasterizer_handle);
// Set the Viewport
builder.append_gl_viewport();
// Upload buffer
upload_command_buffer(builder.build());
// Setup the vertex data
g_vertices = gen_vertex_data();
}
static Gfx::FloatMatrix4x4 get_transform_matrix(unsigned step_num)
{
auto mat = Gfx::FloatMatrix4x4::identity();
float angle = step_num * 0.02;
mat = mat * Gfx::rotation_matrix(FloatVector3(1, 0, 0), angle * 1.17356641f);
mat = mat * Gfx::rotation_matrix(FloatVector3(0, 1, 0), angle * 0.90533273f);
mat = mat * Gfx::rotation_matrix(FloatVector3(0, 0, 1), angle);
return mat;
}
static Vector<float> encode_constant_buffer(Gfx::FloatMatrix4x4 const& mat)
{
// Flip the y axis. This is done because OpenGLs coordinate space has a Y-axis of
// Opposite direction to that of LibGfx
Gfx::FloatMatrix4x4 flip_y = Gfx::FloatMatrix4x4::identity();
flip_y.elements()[1][1] = -1;
auto real_mat = mat * flip_y;
Vector<float> values;
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < 4; ++j) {
values.append(real_mat.elements()[i][j]);
}
}
return values;
}
static void draw_frame(unsigned step_num)
{
// Get model matrix
auto model_matrix = get_transform_matrix(step_num);
VirGLTransferDescriptor descriptor {
.data = (void*)g_vertices.data(),
.offset_in_region = 0,
.num_bytes = sizeof(VertexData) * g_vertices.size(),
.direction = VIRGL_DATA_DIR_GUEST_TO_HOST,
};
// Transfer data from vertices array to kernel virgl transfer region
VERIFY(ioctl(gpu_fd, VIRGL_IOCTL_TRANSFER_DATA, &descriptor) >= 0);
// Create command buffer
CommandBufferBuilder builder;
// Transfer data from kernel virgl transfer region to host resource
builder.append_transfer3d(vbo_resource_id, sizeof(VertexData) * g_vertices.size(), 1, 1, VIRGL_DATA_DIR_GUEST_TO_HOST);
builder.append_end_transfers_3d();
// Set the constant buffer to the identity matrix
builder.append_set_constant_buffer(encode_constant_buffer(model_matrix));
// Clear the framebuffer
builder.append_gl_clear(0, 0, 0);
// Draw the vbo
builder.append_draw_vbo(g_vertices.size());
// Upload the buffer
upload_command_buffer(builder.build());
}
void update_frame(RefPtr<Gfx::Bitmap> target, unsigned num_cycles)
{
VERIFY(target->width() == DRAWTARGET_WIDTH);
VERIFY(target->height() == DRAWTARGET_HEIGHT);
// Run logic to draw the frame
draw_frame(num_cycles);
// Transfer data back from hypervisor to kernel transfer region
CommandBufferBuilder builder;
builder.append_transfer3d(drawtarget, DRAWTARGET_WIDTH, DRAWTARGET_HEIGHT, 1, VIRGL_DATA_DIR_HOST_TO_GUEST);
builder.append_end_transfers_3d();
upload_command_buffer(builder.build());
// Copy from kernel transfer region to userspace
VirGLTransferDescriptor descriptor {
.data = (void*)target->scanline_u8(0),
.offset_in_region = 0,
.num_bytes = DRAWTARGET_WIDTH * DRAWTARGET_HEIGHT * sizeof(u32),
.direction = VIRGL_DATA_DIR_HOST_TO_GUEST,
};
VERIFY(ioctl(gpu_fd, VIRGL_IOCTL_TRANSFER_DATA, &descriptor) >= 0);
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
auto app = TRY(GUI::Application::try_create(arguments));
auto window = TRY(GUI::Window::try_create());
window->set_double_buffering_enabled(true);
window->set_title("VirGLDemo");
window->set_resizable(false);
window->resize(DRAWTARGET_WIDTH, DRAWTARGET_HEIGHT);
window->set_has_alpha_channel(false);
window->set_alpha_hit_threshold(1);
auto demo = TRY(Demo::create());
window->set_main_widget(demo);
auto app_icon = GUI::Icon::default_icon("app-cube"sv);
window->set_icon(app_icon.bitmap_for_size(16));
init();
window->show();
return app->exec();
}

210
Userland/Demos/VirGLDemo/VirGLProtocol.h
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/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DistinctNumeric.h>
AK_TYPEDEF_DISTINCT_ORDERED_ID(u32, ObjectHandle);
AK_TYPEDEF_DISTINCT_ORDERED_ID(u32, ResourceID);
#define VIRGL_BIND_DEPTH_STENCIL (1 << 0)
#define VIRGL_BIND_RENDER_TARGET (1 << 1)
#define VIRGL_BIND_SAMPLER_VIEW (1 << 3)
#define VIRGL_BIND_VERTEX_BUFFER (1 << 4)
#define VIRGL_BIND_INDEX_BUFFER (1 << 5)
#define VIRGL_BIND_CONSTANT_BUFFER (1 << 6)
#define VIRGL_BIND_DISPLAY_TARGET (1 << 7)
#define VIRGL_BIND_COMMAND_ARGS (1 << 8)
#define VIRGL_BIND_STREAM_OUTPUT (1 << 11)
#define VIRGL_BIND_SHADER_BUFFER (1 << 14)
#define VIRGL_BIND_QUERY_BUFFER (1 << 15)
#define VIRGL_BIND_CURSOR (1 << 16)
#define VIRGL_BIND_CUSTOM (1 << 17)
#define VIRGL_BIND_SCANOUT (1 << 18)
#define VIRGL_BIND_STAGING (1 << 19)
#define VIRGL_BIND_SHARED (1 << 20)
namespace Protocol {
enum class TextureFormat : u32 {
// RGBA Formats
VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM = 1,
VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM = 2,
VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM = 3,
VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM = 4,
VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM = 67,
VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM = 68,
VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM = 121,
VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM = 134,
// Stencil-Depth Formats
VIRTIO_GPU_FORMAT_Z16_UNORM = 16,
VIRTIO_GPU_FORMAT_Z32_UNORM = 17,
VIRTIO_GPU_FORMAT_Z32_FLOAT = 18,
VIRTIO_GPU_FORMAT_Z24_UNORM_S8_UINT = 19,
VIRTIO_GPU_FORMAT_S8_UINT_Z24_UNORM = 20,
VIRTIO_GPU_FORMAT_Z24X8_UNORM = 21,
VIRTIO_GPU_FORMAT_X8Z24_UNORM = 22,
VIRTIO_GPU_FORMAT_S8_UINT = 23,
VIRTIO_GPU_FORMAT_Z32_FLOAT_S8X24_UINT = 128,
VIRTIO_GPU_FORMAT_X24S8_UINT = 136,
VIRTIO_GPU_FORMAT_S8X24_UINT = 137,
VIRTIO_GPU_FORMAT_X32_S8X24_UINT = 138,
};
enum class VirGLCommand : u32 {
NOP = 0,
CREATE_OBJECT = 1,
BIND_OBJECT,
DESTROY_OBJECT,
SET_VIEWPORT_STATE,
SET_FRAMEBUFFER_STATE,
SET_VERTEX_BUFFERS,
CLEAR,
DRAW_VBO,
RESOURCE_INLINE_WRITE,
SET_SAMPLER_VIEWS,
SET_INDEX_BUFFER,
SET_CONSTANT_BUFFER,
SET_STENCIL_REF,
SET_BLEND_COLOR,
SET_SCISSOR_STATE,
BLIT,
RESOURCE_COPY_REGION,
BIND_SAMPLER_STATES,
BEGIN_QUERY,
END_QUERY,
GET_QUERY_RESULT,
SET_POLYGON_STIPPLE,
SET_CLIP_STATE,
SET_SAMPLE_MASK,
SET_STREAMOUT_TARGETS,
SET_RENDER_CONDITION,
SET_UNIFORM_BUFFER,
SET_SUB_CTX,
CREATE_SUB_CTX,
DESTROY_SUB_CTX,
BIND_SHADER,
SET_TESS_STATE,
SET_MIN_SAMPLES,
SET_SHADER_BUFFERS,
SET_SHADER_IMAGES,
MEMORY_BARRIER,
LAUNCH_GRID,
SET_FRAMEBUFFER_STATE_NO_ATTACH,
TEXTURE_BARRIER,
SET_ATOMIC_BUFFERS,
SET_DBG_FLAGS,
GET_QUERY_RESULT_QBO,
TRANSFER3D,
END_TRANSFERS,
COPY_TRANSFER3D,
SET_TWEAKS,
CLEAR_TEXTURE,
PIPE_RESOURCE_CREATE,
PIPE_RESOURCE_SET_TYPE,
GET_MEMORY_INFO,
SEND_STRING_MARKER,
MAX_COMMANDS
};
union ClearType {
struct {
u32 depth : 1;
u32 stencil : 1;
u32 color0 : 1;
u32 color1 : 1;
u32 color2 : 1;
u32 color3 : 1;
u32 color4 : 1;
u32 color5 : 1;
u32 color6 : 1;
u32 color7 : 1;
} flags;
u32 value;
};
enum class ObjectType : u32 {
NONE,
BLEND,
RASTERIZER,
DSA,
SHADER,
VERTEX_ELEMENTS,
SAMPLER_VIEW,
SAMPLER_STATE,
SURFACE,
QUERY,
STREAMOUT_TARGET,
MSAA_SURFACE,
MAX_OBJECTS,
};
enum class PipeTextureTarget : u32 {
BUFFER = 0,
TEXTURE_1D,
TEXTURE_2D,
TEXTURE_3D,
TEXTURE_CUBE,
TEXTURE_RECT,
TEXTURE_1D_ARRAY,
TEXTURE_2D_ARRAY,
TEXTURE_CUBE_ARRAY,
MAX
};
enum class PipePrimitiveTypes : u32 {
POINTS = 0,
LINES,
LINE_LOOP,
LINE_STRIP,
TRIANGLES,
TRIANGLE_STRIP,
TRIANGLE_FAN,
QUADS,
QUAD_STRIP,
POLYGON,
LINES_ADJACENCY,
LINE_STRIP_ADJACENCY,
TRIANGLES_ADJACENCY,
TRIANGLE_STRIP_ADJACENCY,
PATCHES,
MAX
};
}
namespace Gallium {
enum class PipeTextureTarget : u32 {
BUFFER,
TEXTURE_1D,
TEXTURE_2D,
TEXTURE_3D,
TEXTURE_CUBE,
TEXTURE_RECT,
TEXTURE_1D_ARRAY,
TEXTURE_2D_ARRAY,
TEXTURE_CUBE_ARRAY,
MAX_TEXTURE_TYPES,
};
enum class ShaderType : u32 {
SHADER_VERTEX = 0,
SHADER_FRAGMENT,
SHADER_GEOMETRY,
SHADER_TESS_CTRL,
SHADER_TESS_EVAL,
SHADER_COMPUTE,
SHADER_TYPES
};
}

44
Userland/Demos/VirGLDemo/Widget.cpp
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/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/Label.h>
#include <LibGUI/Painter.h>
#include "Widget.h"
ErrorOr<NonnullRefPtr<Demo>> Demo::create()
{
auto demo = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Demo));
demo->m_bitmap = TRY(Gfx::Bitmap::try_create(Gfx::BitmapFormat::BGRx8888, { DRAWTARGET_WIDTH, DRAWTARGET_HEIGHT }));
demo->m_bitmap->fill(Gfx::Color::Black);
return demo;
}
Demo::Demo()
{
m_cycles = 0;
stop_timer();
start_timer(16);
}
Demo::~Demo() { }
void Demo::paint_event(GUI::PaintEvent& event)
{
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.draw_scaled_bitmap(rect(), *m_bitmap, m_bitmap->rect());
}
void Demo::timer_event(Core::TimerEvent&)
{
m_cycles += 1;
update_frame(m_bitmap, m_cycles);
update();
}

42
Userland/Demos/VirGLDemo/Widget.h
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/*
* Copyright (c) 2022, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/Widget.h>
void update_frame(RefPtr<Gfx::Bitmap>, unsigned num_cycles);
constexpr size_t DRAWTARGET_WIDTH = 500;
constexpr size_t DRAWTARGET_HEIGHT = 500;
class Demo final : public GUI::Widget {
C_OBJECT(Demo)
public:
static ErrorOr<NonnullRefPtr<Demo>> create();
virtual ~Demo() override;
bool show_window_frame() const { return m_show_window_frame; }
Function<void(GUI::ContextMenuEvent&)> on_context_menu_request;
protected:
virtual void context_menu_event(GUI::ContextMenuEvent& event) override
{
if (on_context_menu_request)
on_context_menu_request(event);
}
private:
Demo();
RefPtr<Gfx::Bitmap> m_bitmap;
virtual void paint_event(GUI::PaintEvent&) override;
virtual void timer_event(Core::TimerEvent&) override;
int m_cycles;
bool m_show_window_frame { true };
};