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41859ad3fe
An Overlay is similar to a transparent window, but has less overhead and does not get rendered within the window stack. Basically, the area that an Overlay occupies forces transparency rendering for any window underneath, which allows us to render them flicker-free. This also adds a new API that allows displaying the screen numbers, e.g. while the user configures the screen layout in DisplaySettings Because other things like drag&drop or the window-size label are not yet converted to use this new mechanism, they will be drawn over the screen-number currently.
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "MultiScaleBitmaps.h"
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#include "Screen.h"
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namespace WindowServer {
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const Gfx::Bitmap& MultiScaleBitmaps::bitmap(int scale_factor) const
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{
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auto it = m_bitmaps.find(scale_factor);
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if (it == m_bitmaps.end()) {
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it = m_bitmaps.find(1);
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if (it == m_bitmaps.end())
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it = m_bitmaps.begin();
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}
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// We better found *something*
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if (it == m_bitmaps.end()) {
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dbgln("Could not find any bitmap in this MultiScaleBitmaps");
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VERIFY_NOT_REACHED();
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}
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return it->value;
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}
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Gfx::Bitmap const* MultiScaleBitmaps::find_bitmap(int scale_factor) const
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{
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auto it = m_bitmaps.find(scale_factor);
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return it != m_bitmaps.end() ? it->value.ptr() : nullptr;
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}
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RefPtr<MultiScaleBitmaps> MultiScaleBitmaps::create_empty()
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{
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return adopt_ref(*new MultiScaleBitmaps());
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}
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RefPtr<MultiScaleBitmaps> MultiScaleBitmaps::create(StringView const& filename, StringView const& default_filename)
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{
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auto per_scale_bitmap = adopt_ref(*new MultiScaleBitmaps());
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if (per_scale_bitmap->load(filename, default_filename))
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return per_scale_bitmap;
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return {};
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}
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bool MultiScaleBitmaps::load(StringView const& filename, StringView const& default_filename)
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{
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Optional<Gfx::BitmapFormat> bitmap_format;
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bool did_load_any = false;
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m_bitmaps.clear(); // If we're reloading the bitmaps get rid of the old ones
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auto add_bitmap = [&](StringView const& path, int scale_factor) {
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auto bitmap = Gfx::Bitmap::load_from_file(path, scale_factor);
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if (bitmap) {
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auto bitmap_format = bitmap->format();
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if (m_format == Gfx::BitmapFormat::Invalid || m_format == bitmap_format) {
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if (m_format == Gfx::BitmapFormat::Invalid)
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m_format = bitmap_format;
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did_load_any = true;
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m_bitmaps.set(scale_factor, bitmap.release_nonnull());
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} else {
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// Gracefully ignore, we have at least one bitmap already
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dbgln("Bitmap {} (scale {}) has format inconsistent with the other per-scale bitmaps", path, bitmap->scale());
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}
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}
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};
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Screen::for_each_scale_factor_in_use([&](int scale_factor) {
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add_bitmap(filename, scale_factor);
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return IterationDecision::Continue;
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});
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if (!did_load_any && !default_filename.is_null() && !default_filename.is_empty()) {
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Screen::for_each_scale_factor_in_use([&](int scale_factor) {
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add_bitmap(default_filename, scale_factor);
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return IterationDecision::Continue;
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});
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}
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return did_load_any;
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}
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void MultiScaleBitmaps::add_bitmap(int scale_factor, NonnullRefPtr<Gfx::Bitmap>&& bitmap)
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{
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auto bitmap_format = bitmap->format();
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if (m_format == Gfx::BitmapFormat::Invalid || m_format == bitmap_format) {
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if (m_format == Gfx::BitmapFormat::Invalid)
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m_format = bitmap_format;
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m_bitmaps.set(scale_factor, move(bitmap));
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} else {
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dbgln("MultiScaleBitmaps::add_bitmap (scale {}) has format inconsistent with the other per-scale bitmaps", bitmap->scale());
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VERIFY_NOT_REACHED(); // The caller of this function should have made sure it is consistent!
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}
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}
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}
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