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Optimize WindowManager::flush() with fast_dword_copy().

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This commit is contained in:
Andreas Kling 2019-01-12 21:45:45 +01:00
parent 6b4e88b515
commit edc827077e
5 changed files with 40 additions and 35 deletions
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30
AK/StdLibExtras.h
View file

@ -13,6 +13,36 @@
#include <utility>
#endif
ALWAYS_INLINE void fast_dword_copy(dword* dest, const dword* src, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep movsl\n"
: "=S"(src), "=D"(dest)
: "S"(src), "D"(dest), "c"(count)
: "memory"
);
#else
memcpy(dest, src, count * sizeof(dword));
#endif
}
ALWAYS_INLINE void fast_dword_fill(dword* dest, dword value, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep stosl\n"
: "=D"(dest)
: "D"(dest), "c"(count), "a"(value)
: "memory"
);
#else
for (size_t i = 0; x <= count; ++x) {
dest[i] = value;
}
#endif
}
namespace AK {
template<typename T>

2
Kernel/init.cpp
View file

@ -22,7 +22,7 @@
#include "Scheduler.h"
#include "PS2MouseDevice.h"
#define SPAWN_MULTIPLE_SHELLS
//#define SPAWN_MULTIPLE_SHELLS
//#define STRESS_TEST_SPAWNING
system_t system;

1
Widgets/GraphicsBitmap.h
View file

@ -17,6 +17,7 @@ public:
Size size() const { return m_size; }
int width() const { return m_size.width(); }
int height() const { return m_size.height(); }
size_t pitch() const { return m_pitch; }
private:
explicit GraphicsBitmap(const Size&);

30
Widgets/Painter.cpp
View file

@ -7,36 +7,6 @@
#define DEBUG_WIDGET_UNDERDRAW
ALWAYS_INLINE void fast_dword_copy(dword* dest, const dword* src, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep movsl\n"
: "=S"(src), "=D"(dest)
: "S"(src), "D"(dest), "c"(count)
: "memory"
);
#else
memcpy(dest, src, count * sizeof(dword));
#endif
}
ALWAYS_INLINE void fast_dword_fill(dword* dest, dword value, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep stosl\n"
: "=D"(dest)
: "D"(dest), "c"(count), "a"(value)
: "memory"
);
#else
for (size_t i = 0; x <= count; ++x) {
dest[i] = value;
}
#endif
}
Painter::Painter(GraphicsBitmap& bitmap)
{
m_font = &Font::defaultFont();

12
Widgets/WindowManager.cpp
View file

@ -346,10 +346,14 @@ void WindowManager::flush(const Rect& a_rect)
{
auto rect = Rect::intersection(a_rect, m_screen_rect);
for (int y = rect.top(); y <= rect.bottom(); ++y) {
auto* front_scanline = m_front_bitmap->scanline(y);
auto* back_scanline = m_back_bitmap->scanline(y);
memcpy(front_scanline + rect.x(), back_scanline + rect.x(), rect.width() * sizeof(RGBA32));
RGBA32* front_ptr = m_front_bitmap->scanline(rect.y()) + rect.x();
const RGBA32* back_ptr = m_back_bitmap->scanline(rect.y()) + rect.x();
size_t pitch = m_back_bitmap->pitch();
for (int y = 0; y < rect.height(); ++y) {
fast_dword_copy(front_ptr, back_ptr, rect.width());
front_ptr = (RGBA32*)((byte*)front_ptr + pitch);
back_ptr = (const RGBA32*)((const byte*)back_ptr + pitch);
}
m_framebuffer.flush();