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Start separating out the SDL-related stuff in Widgets.

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This commit is contained in:
Andreas Kling 2019-01-10 05:21:19 +01:00
parent 077f1007eb
commit 3e908abfca
9 changed files with 54 additions and 34 deletions
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83
Widgets/FrameBufferSDL.cpp
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@ -1,83 +0,0 @@
#include "FrameBufferSDL.h"
#include "GraphicsBitmap.h"
#include <AK/Assertions.h>
FrameBufferSDL* s_the = nullptr;
FrameBufferSDL& FrameBufferSDL::the()
{
ASSERT(s_the);
return *s_the;
}
FrameBufferSDL::FrameBufferSDL(unsigned width, unsigned height)
: AbstractScreen(width, height)
{
ASSERT(!s_the);
s_the = this;
initializeSDL();
}
FrameBufferSDL::~FrameBufferSDL()
{
SDL_DestroyWindow(m_window);
m_surface = nullptr;
m_window = nullptr;
SDL_Quit();
}
void FrameBufferSDL::show()
{
}
void FrameBufferSDL::initializeSDL()
{
if (m_window)
return;
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
ASSERT_NOT_REACHED();
}
m_window = SDL_CreateWindow(
"FrameBuffer",
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
width(),
height(),
SDL_WINDOW_SHOWN);
ASSERT(m_window);
m_surface = SDL_GetWindowSurface(m_window);
ASSERT(m_surface);
SDL_FillRect(m_surface, nullptr, SDL_MapRGB(m_surface->format, 0xff, 0xff, 0xff));
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 + dst_rect.x(), bitmap_scanline + (dst_rect.x() - position.x()), dst_rect.width() * 4);
}
}
void FrameBufferSDL::flush()
{
SDL_UpdateWindowSurface(m_window);
}