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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
//============================================================
//
// drawgdi.c - Win32 GDI drawing
//
//============================================================
#include "drawgdi.h"
#include "rendersw.hxx"
//============================================================
// destructor
//============================================================
renderer_gdi::~renderer_gdi()
{
// free the bitmap memory
if (m_bmdata != nullptr)
global_free_array(m_bmdata);
}
//============================================================
// renderer_gdi::create
//============================================================
int renderer_gdi::create()
{
// fill in the bitmap info header
m_bminfo.bmiHeader.biSize = sizeof(m_bminfo.bmiHeader);
m_bminfo.bmiHeader.biPlanes = 1;
m_bminfo.bmiHeader.biBitCount = 32;
m_bminfo.bmiHeader.biCompression = BI_RGB;
m_bminfo.bmiHeader.biSizeImage = 0;
m_bminfo.bmiHeader.biXPelsPerMeter = 0;
m_bminfo.bmiHeader.biYPelsPerMeter = 0;
m_bminfo.bmiHeader.biClrUsed = 0;
m_bminfo.bmiHeader.biClrImportant = 0;
return 0;
}
//============================================================
// renderer_gdi::get_primitives
//============================================================
render_primitive_list *renderer_gdi::get_primitives()
{
auto win = try_getwindow();
if (win == nullptr)
return nullptr;
RECT client;
GetClientRect(std::static_pointer_cast<win_window_info>(win)->platform_window(), &client);
win->target()->set_bounds(rect_width(&client), rect_height(&client), win->pixel_aspect());
return &win->target()->get_primitives();
}
//============================================================
// renderer_gdi::draw
//============================================================
int renderer_gdi::draw(const int update)
{
auto win = assert_window();
// we don't have any special resize behaviors
if (win->m_resize_state == RESIZE_STATE_PENDING)
win->m_resize_state = RESIZE_STATE_NORMAL;
// get the target bounds
RECT bounds;
GetClientRect(std::static_pointer_cast<win_window_info>(win)->platform_window(), &bounds);
// compute width/height/pitch of target
int width = rect_width(&bounds);
int height = rect_height(&bounds);
int pitch = (width + 3) & ~3;
// make sure our temporary bitmap is big enough
if (pitch * height * 4 > m_bmsize)
{
m_bmsize = pitch * height * 4 * 2;
global_free_array(m_bmdata);
m_bmdata = global_alloc_array(uint8_t, m_bmsize);
}
// draw the primitives to the bitmap
win->m_primlist->acquire_lock();
software_renderer<uint32_t, 0,0,0, 16,8,0>::draw_primitives(*win->m_primlist, m_bmdata, width, height, pitch);
win->m_primlist->release_lock();
// fill in bitmap-specific info
m_bminfo.bmiHeader.biWidth = pitch;
m_bminfo.bmiHeader.biHeight = -height;
// blit to the screen
StretchDIBits(win->m_dc, 0, 0, width, height,
0, 0, width, height,
m_bmdata, &m_bminfo, DIB_RGB_COLORS, SRCCOPY);
return 0;
}
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