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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
#if defined(VMR)
#include "internals/DSDisplayOverlay.h"
#include "internals/DSDisplayGraph.h"
#include "internals/DSUtils.h"
#include "../../resource.h"
using namespace std;
#define ALPHA_VALUE_START 0.8f
#define ALPHA_VALUE_STOP 0.0f
// Hack to get module of the current code
// Only works with Microsoft Linker and could break in the future
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
DSDisplayOverlay::DSDisplayOverlay()
{
this->window = NULL;
this->hdcBmp = NULL;
this->hbmOld = NULL;
}
DSDisplayOverlay::~DSDisplayOverlay()
{
}
void DSDisplayOverlay::attach(HWND parent, DSDisplayGraph *graph)
{
HRESULT hr;
// Gets the handle of the parent and the graph
this->window = parent;
this->displayGraph = graph;
if (this->window)
{
// Hack to get module of the current code
TCHAR *modulePath = (TCHAR *) calloc(255, sizeof(TCHAR));
GetModuleFileName((HINSTANCE)&__ImageBase, modulePath, 255);
HMODULE module = GetModuleHandle(modulePath);
delete[] modulePath;
if (!module)
{
cout << "Failed to get current module";
return;
}
HBITMAP bitmap = LoadBitmap(module, MAKEINTRESOURCE(IDB_BITMAP_OVERLAY));
if (!bitmap)
{
cout << "Failed to load overlay bitmap" << endl;
return;
}
RECT rect;
hr = GetWindowRect(this->window, &rect);
if (FAILED(hr))
{
cout << "Failed to get window size" << endl;
return;
}
BITMAP bm;
HDC hdc = GetDC(this->window);
this->hdcBmp = CreateCompatibleDC(hdc);
ReleaseDC(this->window, hdc);
GetObject(bitmap, sizeof(bm), &bm);
this->hbmOld= (HBITMAP) SelectObject(this->hdcBmp, bitmap);
ZeroMemory(&this->alphaBitmap, sizeof(VMRALPHABITMAP));
this->alphaBitmap.dwFlags = VMRBITMAP_HDC | VMRBITMAP_SRCCOLORKEY;
this->alphaBitmap.hdc = this->hdcBmp;
this->alphaBitmap.clrSrcKey = 0x00FF00FF;
// Source rectangle
this->alphaBitmap.rSrc.left = 0;
this->alphaBitmap.rSrc.top = 0;
this->alphaBitmap.rSrc.right = bm.bmWidth;
this->alphaBitmap.rSrc.bottom = bm.bmHeight;
// Destination rectangle
this->alphaBitmap.rDest.left = (rect.right - rect.left - bm.bmWidth) / 2.0;
this->alphaBitmap.rDest.top = (rect.bottom - rect.top - bm.bmHeight) / 2.0;
this->alphaBitmap.rDest.right = this->alphaBitmap.rDest.left + bm.bmWidth;
this->alphaBitmap.rDest.bottom = this->alphaBitmap.rDest.top + bm.bmHeight;
this->alphaBitmap.rDest.left /= (rect.right - rect.left);
this->alphaBitmap.rDest.top /= (rect.bottom - rect.top);
this->alphaBitmap.rDest.right /= (rect.right - rect.left);
this->alphaBitmap.rDest.bottom /= (rect.bottom - rect.top);
// Alpha value for start
this->alphaBitmap.fAlpha = ALPHA_VALUE_START;
}
}
void DSDisplayOverlay::detach()
{
// Clean up
DeleteObject(SelectObject(this->hdcBmp, this->hbmOld));
DeleteDC(this->hdcBmp);
this->hdcBmp = NULL;
this->hbmOld = NULL;
this->displayGraph = NULL;
this->window = NULL;
}
void DSDisplayOverlay::show(int value)
{
// Store the ticks to count down
this->ticks = value;
// Compute alpha value decrement
this->alphaStep = (this->ticks > 0) ? ((ALPHA_VALUE_START - ALPHA_VALUE_STOP) / this->ticks) : 0;
this->alphaBitmap.fAlpha = ALPHA_VALUE_START;
this->internalUpdate();
}
void DSDisplayOverlay::update()
{
if (this->displayGraph && (this->ticks > 0))
{
this->ticks--;
// Be sure alpha is in 0.0 .. 1.0 range.
float value = this->alphaBitmap.fAlpha;
value -= this->alphaStep;
this->alphaBitmap.fAlpha = (value >= 0.0f) ? value : 0.0f;
this->internalUpdate();
}
}
void DSDisplayOverlay::internalUpdate()
{
HRESULT hr;
if (this->ticks > 0)
{
this->alphaBitmap.dwFlags = VMRBITMAP_HDC | VMRBITMAP_SRCCOLORKEY;
}
else
{
this->alphaBitmap.dwFlags = VMRBITMAP_DISABLE;
}
hr = this->displayGraph->getMixerBitmap()->SetAlphaBitmap(&this->alphaBitmap);
if (FAILED(hr))
{
cout << "Failed to mix overylay (" << hr << ")" << endl;
return;
}
}
#endif
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