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https://github.com/RGBCube/serenity
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61af9d882e
This enables rendering of mixed-scale screen layouts with e.g. high resolution cursors and window button icons on high-dpi screens while using lower resolution bitmaps on regular screens.
70 lines
2.2 KiB
C++
70 lines
2.2 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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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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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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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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}
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