123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304 |
- // Copyright 2016 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "ui/base/x/visual_picker_glx.h"
- #include <algorithm>
- #include <bitset>
- #include <cstring>
- #include <map>
- #include <numeric>
- #include <vector>
- #include "base/memory/singleton.h"
- #include "ui/gfx/x/future.h"
- // These constants are obtained from GL/glx.h and GL/glxext.h.
- constexpr uint32_t GLX_LEVEL = 3;
- constexpr uint32_t GLX_DOUBLEBUFFER = 5;
- constexpr uint32_t GLX_STEREO = 6;
- constexpr uint32_t GLX_BUFFER_SIZE = 2;
- constexpr uint32_t GLX_AUX_BUFFERS = 7;
- constexpr uint32_t GLX_RED_SIZE = 8;
- constexpr uint32_t GLX_GREEN_SIZE = 9;
- constexpr uint32_t GLX_BLUE_SIZE = 10;
- constexpr uint32_t GLX_ALPHA_SIZE = 11;
- constexpr uint32_t GLX_DEPTH_SIZE = 12;
- constexpr uint32_t GLX_STENCIL_SIZE = 13;
- constexpr uint32_t GLX_ACCUM_RED_SIZE = 14;
- constexpr uint32_t GLX_ACCUM_GREEN_SIZE = 15;
- constexpr uint32_t GLX_ACCUM_BLUE_SIZE = 16;
- constexpr uint32_t GLX_ACCUM_ALPHA_SIZE = 17;
- constexpr uint32_t GLX_CONFIG_CAVEAT = 0x20;
- constexpr uint32_t GLX_VISUAL_CAVEAT_EXT = 0x20;
- constexpr uint32_t GLX_X_VISUAL_TYPE = 0x22;
- constexpr uint32_t GLX_BIND_TO_TEXTURE_TARGETS_EXT = 0x20D3;
- constexpr uint32_t GLX_NONE = 0x8000;
- constexpr uint32_t GLX_NONE_EXT = 0x8000;
- constexpr uint32_t GLX_TRUE_COLOR = 0x8002;
- constexpr uint32_t GLX_VISUAL_ID = 0x800B;
- constexpr uint32_t GLX_DRAWABLE_TYPE = 0x8010;
- constexpr uint32_t GLX_RENDER_TYPE = 0x8011;
- constexpr uint32_t GLX_FBCONFIG_ID = 0x8013;
- constexpr uint32_t GLX_PIXMAP_BIT = 0x00000002;
- constexpr uint32_t GLX_TEXTURE_2D_BIT_EXT = 0x00000002;
- constexpr uint32_t GLX_SAMPLE_BUFFERS_ARB = 100000;
- constexpr uint32_t GLX_SAMPLES = 100001;
- constexpr uint32_t GL_FALSE = 0;
- namespace ui {
- namespace {
- bool IsArgbVisual(const x11::Connection::VisualInfo& visual) {
- auto bits = [](auto x) {
- return std::bitset<8 * sizeof(decltype(x))>(x).count();
- };
- auto bits_rgb = bits(visual.visual_type->red_mask) +
- bits(visual.visual_type->green_mask) +
- bits(visual.visual_type->blue_mask);
- return static_cast<std::size_t>(visual.format->depth) > bits_rgb;
- }
- // Used to filter visuals by the best class.
- int VisualScore(x11::VisualClass c_class) {
- // A higher score is more preferable.
- switch (c_class) {
- case x11::VisualClass::TrueColor:
- return 1;
- case x11::VisualClass::DirectColor:
- return 0;
- default:
- return -1;
- }
- }
- } // anonymous namespace
- // static
- VisualPickerGlx* VisualPickerGlx::GetInstance() {
- return base::Singleton<VisualPickerGlx>::get();
- }
- x11::Glx::FbConfig VisualPickerGlx::GetFbConfigForFormat(
- gfx::BufferFormat format) {
- if (!config_map_)
- FillConfigMap();
- auto it = config_map_->find(format);
- return it == config_map_->end() ? x11::Glx::FbConfig{} : it->second;
- }
- x11::VisualId VisualPickerGlx::PickBestGlVisual(
- const x11::Glx::GetVisualConfigsReply& configs,
- base::RepeatingCallback<bool(const x11::Connection::VisualInfo&)> pred,
- bool want_alpha) const {
- int highest_score = -1;
- x11::VisualId best_visual{};
- for (size_t cfg = 0; cfg < configs.num_visuals; cfg++) {
- size_t i = cfg * configs.num_properties;
- std::map<uint32_t, uint32_t> props;
- static constexpr uint32_t static_props[] = {
- GLX_VISUAL_ID, GLX_X_VISUAL_TYPE, GLX_RENDER_TYPE,
- GLX_RED_SIZE, GLX_GREEN_SIZE, GLX_BLUE_SIZE,
- GLX_ALPHA_SIZE, GLX_ACCUM_RED_SIZE, GLX_ACCUM_GREEN_SIZE,
- GLX_ACCUM_BLUE_SIZE, GLX_ACCUM_ALPHA_SIZE, GLX_DOUBLEBUFFER,
- GLX_STEREO, GLX_BUFFER_SIZE, GLX_DEPTH_SIZE,
- GLX_STENCIL_SIZE, GLX_AUX_BUFFERS, GLX_LEVEL,
- };
- for (const uint32_t prop : static_props)
- props[prop] = configs.property_list[i++];
- const size_t extra_props =
- (configs.num_properties - std::size(static_props)) / 2;
- for (size_t j = 0; j < extra_props; j++) {
- const auto key = configs.property_list[i++];
- const auto value = configs.property_list[i++];
- // Mesa adds a (0, 0) key-value pair at the end of each property list.
- if (!key)
- continue;
- props[key] = value;
- }
- auto get = [&](uint32_t key) {
- auto it = props.find(key);
- return it == props.end() ? 0 : it->second;
- };
- const auto visual_id = static_cast<x11::VisualId>(get(GLX_VISUAL_ID));
- const auto* info = connection_->GetVisualInfoFromId(visual_id);
- if (!pred.Run(*info))
- continue;
- if (!get(GLX_DOUBLEBUFFER) || get(GLX_STEREO))
- continue;
- auto caveat = get(GLX_VISUAL_CAVEAT_EXT);
- if (caveat && caveat != GLX_NONE_EXT)
- continue;
- // Give precedence to the root visual if it satisfies the basic
- // requirements above. This can avoid an expensive copy-on-present.
- if (visual_id == connection_->default_root_visual().visual_id)
- return visual_id;
- int score = 0;
- if (get(GLX_SAMPLE_BUFFERS_ARB) == 0) {
- score++;
- if (get(GLX_DEPTH_SIZE) == 0 && get(GLX_STENCIL_SIZE) == 0) {
- score++;
- const bool has_alpha = get(GLX_ALPHA_SIZE) > 0;
- if (has_alpha == want_alpha)
- score++;
- }
- }
- if (score > highest_score) {
- highest_score = score;
- best_visual = visual_id;
- }
- }
- return best_visual;
- }
- x11::VisualId VisualPickerGlx::PickBestSystemVisual(
- const x11::Glx::GetVisualConfigsReply& configs) const {
- x11::Connection::VisualInfo default_visual_info =
- *connection_->GetVisualInfoFromId(
- connection_->default_root_visual().visual_id);
- auto is_compatible_with_root_visual =
- [](const x11::Connection::VisualInfo& default_visual_info,
- const x11::Connection::VisualInfo& visual_info) {
- const auto& dvt = *default_visual_info.visual_type;
- const auto& vt = *visual_info.visual_type;
- return vt.c_class == dvt.c_class &&
- visual_info.format->depth == default_visual_info.format->depth &&
- vt.red_mask == dvt.red_mask && vt.green_mask == dvt.green_mask &&
- vt.blue_mask == dvt.blue_mask &&
- vt.colormap_entries == dvt.colormap_entries &&
- vt.bits_per_rgb_value == dvt.bits_per_rgb_value;
- };
- return PickBestGlVisual(
- configs,
- base::BindRepeating(is_compatible_with_root_visual, default_visual_info),
- IsArgbVisual(default_visual_info));
- }
- x11::VisualId VisualPickerGlx::PickBestRgbaVisual(
- const x11::Glx::GetVisualConfigsReply& configs) const {
- int best_class_score = -1;
- for (const auto& depth : connection_->default_screen().allowed_depths) {
- for (const auto& vis : depth.visuals)
- best_class_score = std::max(best_class_score, VisualScore(vis.c_class));
- }
- auto pred = [](int best_class_score,
- const x11::Connection::VisualInfo& visual_info) {
- if (!IsArgbVisual(visual_info))
- return false;
- return VisualScore(visual_info.visual_type->c_class) == best_class_score;
- };
- return PickBestGlVisual(configs, base::BindRepeating(pred, best_class_score),
- true);
- }
- void VisualPickerGlx::FillConfigMap() {
- DCHECK(!config_map_);
- config_map_ =
- std::make_unique<base::flat_map<gfx::BufferFormat, x11::Glx::FbConfig>>();
- if (auto configs = connection_->glx()
- .GetFBConfigs({static_cast<uint32_t>(
- connection_->DefaultScreenId())})
- .Sync()) {
- const auto n_cfgs = configs->num_FB_configs;
- const auto n_props = configs->num_properties;
- // Iterate from back to front since "preferred" FB configs appear earlier.
- for (size_t cfg = n_cfgs; cfg-- > 0;) {
- std::map<uint32_t, uint32_t> props;
- for (size_t prop = 0; prop < n_props; prop++) {
- size_t i = 2 * cfg * n_props + 2 * prop;
- const auto key = configs->property_list[i];
- const auto value = configs->property_list[i + 1];
- props[key] = value;
- }
- auto get = [&](uint32_t key) {
- auto it = props.find(key);
- return it == props.end() ? 0 : it->second;
- };
- // Each config must have an ID.
- auto id = get(GLX_FBCONFIG_ID);
- DCHECK(id);
- auto fbconfig = static_cast<x11::Glx::FbConfig>(id);
- // Ensure the config is compatible with pixmap drawing.
- if (!(get(GLX_DRAWABLE_TYPE) & GLX_PIXMAP_BIT))
- continue;
- // Ensure we can bind to GL_TEXTURE_2D.
- if (!(get(GLX_BIND_TO_TEXTURE_TARGETS_EXT) & GLX_TEXTURE_2D_BIT_EXT))
- continue;
- // No double-buffering.
- if (get(GLX_DOUBLEBUFFER) != GL_FALSE)
- continue;
- // Prefer true-color over direct-color.
- if (get(GLX_X_VISUAL_TYPE) != GLX_TRUE_COLOR)
- continue;
- // No caveats.
- auto caveat = get(GLX_CONFIG_CAVEAT);
- if (caveat && caveat != GLX_NONE)
- continue;
- // No antialiasing needed.
- if (get(GLX_SAMPLES))
- continue;
- // No depth buffer needed.
- if (get(GLX_DEPTH_SIZE))
- continue;
- auto r = get(GLX_RED_SIZE);
- auto g = get(GLX_GREEN_SIZE);
- auto b = get(GLX_BLUE_SIZE);
- auto a = get(GLX_ALPHA_SIZE);
- if (r == 5 && g == 6 && b == 5 && a == 0)
- (*config_map_)[gfx::BufferFormat::BGR_565] = fbconfig;
- else if (r == 8 && g == 8 && b == 8 && a == 0)
- (*config_map_)[gfx::BufferFormat::BGRX_8888] = fbconfig;
- else if (r == 10 && g == 10 && b == 10 && a == 0)
- (*config_map_)[gfx::BufferFormat::BGRA_1010102] = fbconfig;
- else if (r == 8 && g == 8 && b == 8 && a == 8)
- (*config_map_)[gfx::BufferFormat::BGRA_8888] = fbconfig;
- }
- }
- }
- VisualPickerGlx::VisualPickerGlx() : connection_(x11::Connection::Get()) {
- auto configs =
- connection_->glx()
- .GetVisualConfigs(
- {static_cast<uint32_t>(connection_->DefaultScreenId())})
- .Sync();
- if (configs) {
- system_visual_ = PickBestSystemVisual(*configs.reply);
- rgba_visual_ = PickBestRgbaVisual(*configs.reply);
- }
- }
- VisualPickerGlx::~VisualPickerGlx() = default;
- } // namespace ui
|