mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 18:37:58 +03:00
5f9c42c404
Gfx::Bitmap can now store its scale factor. Normally it's 1, but in high dpi mode it can be 2. If a Bitmap with a scale factor of 2 is blitted to a Painter with scale factor of 2, the pixels can be copied over without any resampling. (When blitting a Bitmap with a scale factor of 1 to a Painter with scale factor of 2, the Bitmap is painted at twice its width and height at paint time. Blitting a Bitmap with a scale factor of 2 to a Painter with scale factor 1 is not supported.) A Bitmap with scale factor of 2 reports the same width() and height() as one with scale factor 1. That's important because many places in the codebase use a bitmap's width() and height() to layout Widgets, and all widget coordinates are in logical coordinates as well, per Documentation/HighDPI.md. Bitmap grows physical_width() / physical_height() to access the actual pixel size. Update a few callers that work with pixels to call this instead. Make Painter's constructor take its scale factor from the target bitmap that's passed in, and update its various blit() methods to handle blitting a 2x bitmap to a 2x painter. This allows removing some gnarly code in Compositor. (In return, put some new gnarly code in LibGfxScaleDemo to preserve behavior there.) No intended behavior change.
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <LibGfx/Bitmap.h>
|
|
#include <LibGfx/ShareableBitmap.h>
|
|
#include <LibGfx/Size.h>
|
|
#include <LibIPC/Decoder.h>
|
|
#include <LibIPC/Encoder.h>
|
|
#include <LibIPC/File.h>
|
|
|
|
namespace Gfx {
|
|
|
|
ShareableBitmap::ShareableBitmap(const Bitmap& bitmap)
|
|
: m_bitmap(bitmap.to_bitmap_backed_by_anon_fd())
|
|
{
|
|
}
|
|
|
|
ShareableBitmap::ShareableBitmap(NonnullRefPtr<Bitmap> bitmap, Tag)
|
|
: m_bitmap(move(bitmap))
|
|
{
|
|
}
|
|
|
|
}
|
|
|
|
namespace IPC {
|
|
|
|
bool encode(Encoder& encoder, const Gfx::ShareableBitmap& shareable_bitmap)
|
|
{
|
|
encoder << shareable_bitmap.is_valid();
|
|
if (!shareable_bitmap.is_valid())
|
|
return true;
|
|
auto& bitmap = *shareable_bitmap.bitmap();
|
|
encoder << IPC::File(bitmap.anon_fd());
|
|
encoder << bitmap.size();
|
|
encoder << bitmap.scale();
|
|
encoder << (u32)bitmap.format();
|
|
if (bitmap.is_indexed()) {
|
|
auto palette = bitmap.palette_to_vector();
|
|
encoder << palette;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool decode(Decoder& decoder, Gfx::ShareableBitmap& shareable_bitmap)
|
|
{
|
|
bool valid = false;
|
|
if (!decoder.decode(valid))
|
|
return false;
|
|
if (!valid) {
|
|
shareable_bitmap = {};
|
|
return true;
|
|
}
|
|
IPC::File anon_file;
|
|
if (!decoder.decode(anon_file))
|
|
return false;
|
|
Gfx::IntSize size;
|
|
if (!decoder.decode(size))
|
|
return false;
|
|
u32 scale;
|
|
if (!decoder.decode(scale))
|
|
return false;
|
|
u32 raw_bitmap_format;
|
|
if (!decoder.decode(raw_bitmap_format))
|
|
return false;
|
|
if (!Gfx::is_valid_bitmap_format(raw_bitmap_format))
|
|
return false;
|
|
auto bitmap_format = (Gfx::BitmapFormat)raw_bitmap_format;
|
|
Vector<Gfx::RGBA32> palette;
|
|
if (Gfx::Bitmap::is_indexed(bitmap_format)) {
|
|
if (!decoder.decode(palette))
|
|
return false;
|
|
}
|
|
auto bitmap = Gfx::Bitmap::create_with_anon_fd(bitmap_format, anon_file.take_fd(), size, scale, palette, Gfx::Bitmap::ShouldCloseAnonymousFile::Yes);
|
|
if (!bitmap)
|
|
return false;
|
|
shareable_bitmap = Gfx::ShareableBitmap { bitmap.release_nonnull(), Gfx::ShareableBitmap::ConstructWithKnownGoodBitmap };
|
|
return true;
|
|
}
|
|
|
|
}
|