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#include "FrameBuffer.h"
#include "GraphicsBitmap.h"
#include <AK/Assertions.h>
FrameBuffer* s_the;
void FrameBuffer::initialize()
{
s_the = nullptr;
}
FrameBuffer& FrameBuffer::the()
{
ASSERT(s_the);
return *s_the;
}
FrameBuffer::FrameBuffer(unsigned width, unsigned height)
: AbstractScreen(width, height)
{
ASSERT(!s_the);
s_the = this;
#ifdef USE_SDL
initializeSDL();
#endif
}
FrameBuffer::FrameBuffer(RGBA32* data, unsigned width, unsigned height)
: AbstractScreen(width, height)
#ifdef SERENITY
, m_data(data)
#endif
{
ASSERT(!s_the);
s_the = this;
}
FrameBuffer::~FrameBuffer()
{
#ifdef USE_SDL
SDL_DestroyWindow(m_window);
m_surface = nullptr;
m_window = nullptr;
SDL_Quit();
#endif
}
void FrameBuffer::show()
{
}
#ifdef USE_SDL
void FrameBuffer::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);
}
#endif
RGBA32* FrameBuffer::scanline(int y)
{
#ifdef USE_SDL
return reinterpret_cast<RGBA32*>(((byte*)m_surface->pixels) + (y * m_surface->pitch));
#endif
#ifdef SERENITY
unsigned pitch = sizeof(RGBA32) * width();
return reinterpret_cast<RGBA32*>(((byte*)m_data) + (y * pitch));
#endif
}
void FrameBuffer::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 FrameBuffer::flush()
{
#ifdef USE_SDL
SDL_UpdateWindowSurface(m_window);
#endif
}
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