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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Display/display_precomp.h"
#include "dc_buffer_generic.h"
// Define DIBSECTION to share pixelbuffer data with GDI. Currently fucks up colors tho.
// #define USE_DIBSECTION
/////////////////////////////////////////////////////////////////////////////
// CL_DeviceContextBuffer_Generic construction:
CL_DeviceContextBuffer_Generic::CL_DeviceContextBuffer_Generic(HDC reference_dc, int bitmap_width, int bitmap_height, bool monocrome_alpha)
{
ref_dc = reference_dc;
// Find the pixelformat properties for the reference DC:
unsigned int red_mask = 0xff0000;
unsigned int green_mask = 0x00ff00;
unsigned int blue_mask = 0x0000ff;
// Setup pixelbuffer format info:
if (monocrome_alpha)
{
format.set_red_mask(red_mask);
format.set_green_mask(red_mask);
format.set_blue_mask(red_mask);
format.set_alpha_mask(blue_mask);
format.set_depth(32);
}
else
{
format.set_red_mask(red_mask);
format.set_green_mask(green_mask);
format.set_blue_mask(blue_mask);
format.set_alpha_mask(0);
format.set_depth(32);
}
width = bitmap_width;
height = bitmap_height;
pitch = width*4;
// Create DC and bitmap for pixelbuffer:
memory_dc = CreateCompatibleDC(ref_dc);
memset(&bitmap_info, 0, sizeof(BITMAPINFO));
bitmap_info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bitmap_info.bmiHeader.biWidth = width;
bitmap_info.bmiHeader.biHeight = -height;
bitmap_info.bmiHeader.biPlanes = 1;
bitmap_info.bmiHeader.biBitCount = 32;
bitmap_info.bmiHeader.biCompression = BI_BITFIELDS;
bitmap_info.bmiHeader.biSizeImage = pitch*height;
bitmap_info.bmiColors[0].rgbRed = red_mask;
bitmap_info.bmiColors[0].rgbGreen = green_mask;
bitmap_info.bmiColors[0].rgbBlue = blue_mask;
#ifdef USE_DIBSECTION
bitmap = CreateDIBSection(ref_dc, &bitmap_info, DIB_RGB_COLORS, (LPVOID *) &data, 0, 0);
#else
bitmap = CreateCompatibleBitmap(ref_dc, width, height);
first_lock = true;
data = 0;
#endif
orig_bitmap = (HBITMAP) SelectObject(memory_dc, bitmap);
}
CL_DeviceContextBuffer_Generic::~CL_DeviceContextBuffer_Generic()
{
#ifndef USE_DIBSECTION
delete[] data;
#endif
SelectObject(memory_dc, orig_bitmap);
DeleteObject(bitmap);
DeleteDC(memory_dc);
}
/////////////////////////////////////////////////////////////////////////////
// CL_DeviceContextBuffer_Generic operations:
void *CL_DeviceContextBuffer_Generic::get_data()
{
return data;
}
void CL_DeviceContextBuffer_Generic::perform_lock()
{
#ifdef USE_DIBSECTION
// We call GdiFlush() here to ensure that any operations on the device context actually finished when
// application start accessing the data.
GdiFlush();
#else
if (first_lock)
{
data = new unsigned char[pitch*height];
/*int scanlines =*/ GetDIBits(memory_dc, bitmap, 0, height, data, &bitmap_info, DIB_RGB_COLORS);
first_lock = false;
}
#endif
}
void CL_DeviceContextBuffer_Generic::perform_unlock()
{
}
/////////////////////////////////////////////////////////////////////////////
// CL_DeviceContextBuffer_Generic implementation:
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