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https://github.com/RGBCube/serenity
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Make sure all GraphicsBitmap scanlines are 16-byte aligned.
This is a prerequisite for some optimizations.
This commit is contained in:
parent
fafdda8902
commit
cec16105cc
5 changed files with 29 additions and 24 deletions
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@ -14,11 +14,10 @@ Retained<GraphicsBitmap> GraphicsBitmap::create(Format format, const Size& size)
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GraphicsBitmap::GraphicsBitmap(Format format, const Size& size)
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: m_size(size)
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
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, m_format(format)
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{
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size_t size_in_bytes = size.area() * sizeof(RGBA32);
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m_data = (RGBA32*)mmap(nullptr, size_in_bytes, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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m_data = (RGBA32*)mmap(nullptr, size_in_bytes(), PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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ASSERT(m_data && m_data != (void*)-1);
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m_needs_munmap = true;
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set_mmap_name(String::format("GraphicsBitmap [%dx%d]", width(), height()).characters());
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@ -45,7 +44,7 @@ RetainPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(Format format, const St
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GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, RGBA32* data)
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: m_size(size)
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, m_data(data)
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
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, m_format(format)
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{
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}
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@ -53,7 +52,7 @@ GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, RGBA32* data)
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GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, MappedFile&& mapped_file)
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: m_size(size)
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, m_data((RGBA32*)mapped_file.pointer())
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
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, m_format(format)
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, m_mapped_file(move(mapped_file))
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{
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@ -67,7 +66,7 @@ Retained<GraphicsBitmap> GraphicsBitmap::create_with_shared_buffer(Format format
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GraphicsBitmap::GraphicsBitmap(Format format, Retained<SharedBuffer>&& shared_buffer, const Size& size)
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: m_size(size)
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, m_data((RGBA32*)shared_buffer->data())
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
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, m_format(format)
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, m_shared_buffer(move(shared_buffer))
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{
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@ -76,8 +75,7 @@ GraphicsBitmap::GraphicsBitmap(Format format, Retained<SharedBuffer>&& shared_bu
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GraphicsBitmap::~GraphicsBitmap()
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{
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if (m_needs_munmap) {
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size_t size_in_bytes = m_size.area() * sizeof(RGBA32);
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int rc = munmap(m_data, size_in_bytes);
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int rc = munmap(m_data, size_in_bytes());
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ASSERT(rc == 0);
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}
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m_data = nullptr;
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@ -86,6 +84,5 @@ GraphicsBitmap::~GraphicsBitmap()
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void GraphicsBitmap::set_mmap_name(const String& name)
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{
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ASSERT(m_needs_munmap);
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size_t size_in_bytes = m_size.area() * sizeof(RGBA32);
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::set_mmap_name(m_data, size_in_bytes, name.characters());
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::set_mmap_name(m_data, size_in_bytes(), name.characters());
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}
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