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Start refactoring graphics system to have per-window backing stores.

Browse source 
It was fun for everyone to share a single framebuffer but it was also
kinda really awful. Let's move towards having a "GraphicsBitmap" as the
backing store for each Window.

This is going to need a lot of refactoring so let's get started.
This commit is contained in:
Andreas Kling 2019-01-09 02:06:04 +01:00
parent 2735b7e50d
commit 9963da9005
21 changed files with 212 additions and 41 deletions
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25
Widgets/FrameBufferSDL.cpp
View file

@ -1,4 +1,5 @@
#include "FrameBufferSDL.h"
#include "GraphicsBitmap.h"
#include <AK/Assertions.h>
FrameBufferSDL* s_the = nullptr;
@ -57,3 +58,27 @@ void FrameBufferSDL::initializeSDL()
SDL_UpdateWindowSurface(m_window);
}
dword* FrameBufferSDL::scanline(int y)
{
return (dword*)(((byte*)m_surface->pixels) + (y * m_surface->pitch));
}
void FrameBufferSDL::blit(const Point& position, GraphicsBitmap& bitmap)
{
Rect dst_rect(position, bitmap.size());
printf("blit at %d,%d %dx%d\n", dst_rect.x(), dst_rect.y(), dst_rect.width(), dst_rect.height());
dst_rect.intersect(rect());
printf(" -> intersection %d,%d %dx%d\n", dst_rect.x(), dst_rect.y(), dst_rect.width(), dst_rect.height());
for (int y = 0; y < dst_rect.height(); ++y) {
auto* framebuffer_scanline = scanline(position.y() + y);
auto* bitmap_scanline = bitmap.scanline(y);
memcpy(framebuffer_scanline + position.x(), bitmap_scanline, dst_rect.width() * 4);
}
}
void FrameBufferSDL::flush()
{
SDL_UpdateWindowSurface(m_window);
}