rainmeter-studio/Common/Gfx/CanvasD2D.cpp
2013-04-12 17:09:42 +03:00

460 lines
12 KiB
C++

/*
Copyright (C) 2013 Birunthan Mohanathas
This program 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 2
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "CanvasD2D.h"
#include "TextFormatD2D.h"
#include "Util/DWriteFontCollectionLoader.h"
#include "Util/WICBitmapLockGDIP.h"
#include "../../Library/Litestep.h"
template<class T>
inline void SafeRelease(T** t)
{
if (*t)
{
(*t)->Release();
*t = nullptr;
}
}
namespace {
D2D1_COLOR_F ToColorF(const Gdiplus::Color& color)
{
return D2D1::ColorF(color.GetR() / 255.0f, color.GetG() / 255.0f, color.GetB() / 255.0f, color.GetA() / 255.0f);
}
D2D1_RECT_F ToRectF(const Gdiplus::Rect& rect)
{
return D2D1::RectF(rect.X, rect.Y, rect.X + rect.Width, rect.Y + rect.Height);
}
D2D1_RECT_F ToRectF(const Gdiplus::RectF& rect)
{
return D2D1::RectF(rect.X, rect.Y, rect.X + rect.Width, rect.Y + rect.Height);
}
} // namespace
namespace Gfx {
UINT CanvasD2D::c_Instances = 0;
ID2D1Factory* CanvasD2D::c_D2DFactory = nullptr;
IDWriteFactory* CanvasD2D::c_DWFactory = nullptr;
IDWriteGdiInterop* CanvasD2D::c_DWGDIInterop = nullptr;
IWICImagingFactory* CanvasD2D::c_WICFactory = nullptr;
CanvasD2D::CanvasD2D() : Canvas(),
m_Target(),
m_Bitmap(),
m_GdipGraphics(),
m_GdipBitmap(),
m_TextAntiAliasing(false)
{
Initialize();
}
CanvasD2D::~CanvasD2D()
{
Dispose();
Finalize();
}
bool CanvasD2D::Initialize()
{
++c_Instances;
if (c_Instances == 1)
{
D2D1_FACTORY_OPTIONS fo = {};
#ifdef _DEBUG
fo.debugLevel = D2D1_DEBUG_LEVEL_INFORMATION;
#endif
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE_SINGLE_THREADED,
fo,
&c_D2DFactory);
if (FAILED(hr)) return false;
hr = CoCreateInstance(
CLSID_WICImagingFactory,
nullptr,
CLSCTX_INPROC_SERVER,
IID_IWICImagingFactory,
(LPVOID*)&c_WICFactory);
if (FAILED(hr)) return false;
hr = DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
(IUnknown**)&c_DWFactory);
if (FAILED(hr)) return false;
hr = c_DWFactory->GetGdiInterop(&c_DWGDIInterop);
if (FAILED(hr)) return false;
hr = c_DWFactory->RegisterFontCollectionLoader(Util::DWriteFontCollectionLoader::GetInstance());
if (FAILED(hr)) return false;
}
return true;
}
void CanvasD2D::Finalize()
{
--c_Instances;
if (c_Instances == 0)
{
SafeRelease(&c_D2DFactory);
SafeRelease(&c_WICFactory);
SafeRelease(&c_DWGDIInterop);
c_DWFactory->UnregisterFontCollectionLoader(Util::DWriteFontCollectionLoader::GetInstance());
SafeRelease(&c_DWFactory);
}
}
void CanvasD2D::Dispose()
{
SafeRelease(&m_Target);
delete m_GdipGraphics;
m_GdipGraphics = nullptr;
delete m_GdipBitmap;
m_GdipBitmap = nullptr;
}
void CanvasD2D::Resize(int w, int h)
{
__super::Resize(w, h);
Dispose();
m_Bitmap.Resize(w, h);
m_GdipBitmap = new Gdiplus::Bitmap(w, h, w * 4, PixelFormat32bppPARGB, m_Bitmap.GetData());
m_GdipGraphics = new Gdiplus::Graphics(m_GdipBitmap);
}
bool CanvasD2D::BeginDraw()
{
return true;
}
void CanvasD2D::EndDraw()
{
EndTargetDraw();
}
bool CanvasD2D::BeginTargetDraw()
{
if (m_Target) return true;
const D2D1_PIXEL_FORMAT format = D2D1::PixelFormat(
DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_PREMULTIPLIED);
const D2D1_RENDER_TARGET_PROPERTIES properties = D2D1::RenderTargetProperties(
D2D1_RENDER_TARGET_TYPE_DEFAULT,
format,
0.0f, // Default DPI
0.0f, // Default DPI
D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE);
// A new Direct2D render target must be created for each sequence of Direct2D draw operations
// since we use GDI+ to render to the same pixel data. Without creating a new render target
// each time, it has been found that Direct2D may overwrite the draws by GDI+ since it is
// unaware of the changes made by GDI+. By creating a new render target and then releasing it
// before the next GDI+ draw operations, we ensure that the pixel data result is as expected
// Once GDI+ drawing is no longer needed, we change to recreate the render target only when the
// bitmap size is changed.
HRESULT hr = c_D2DFactory->CreateWicBitmapRenderTarget(&m_Bitmap, properties, &m_Target);
if (SUCCEEDED(hr))
{
SetTextAntiAliasing(m_TextAntiAliasing);
m_Target->BeginDraw();
// Apply any transforms that occurred before creation of m_Target
m_Target->SetTransform(GetCurrentTransform());
return true;
}
return false;
}
void CanvasD2D::EndTargetDraw()
{
if (m_Target)
{
m_Target->EndDraw();
SafeRelease(&m_Target);
}
}
Gdiplus::Graphics& CanvasD2D::BeginGdiplusContext()
{
EndTargetDraw();
return *m_GdipGraphics;
}
void CanvasD2D::EndGdiplusContext()
{
}
HDC CanvasD2D::GetDC()
{
EndTargetDraw();
HDC dcMemory = CreateCompatibleDC(nullptr);
SelectObject(dcMemory, m_Bitmap.GetHandle());
return dcMemory;
}
void CanvasD2D::ReleaseDC(HDC dc)
{
DeleteDC(dc);
}
bool CanvasD2D::IsTransparentPixel(int x, int y)
{
if (!(x >= 0 && y >= 0 && x < m_W && y < m_H)) return false;
bool transparent = true;
DWORD* data = (DWORD*)m_Bitmap.GetData();
if (data)
{
DWORD pixel = data[y * m_W + x]; // Top-down DIB.
transparent = (pixel & 0xFF000000) != 0;
}
return transparent;
}
D2D1_MATRIX_3X2_F CanvasD2D::GetCurrentTransform()
{
D2D1_MATRIX_3X2_F d2dMatrix;
Gdiplus::Matrix gdipMatrix;
m_GdipGraphics->GetTransform(&gdipMatrix);
gdipMatrix.GetElements((Gdiplus::REAL*)&d2dMatrix);
return d2dMatrix;
}
void CanvasD2D::SetTransform(const Gdiplus::Matrix& matrix)
{
m_GdipGraphics->SetTransform(&matrix);
if (m_Target)
{
m_Target->SetTransform(GetCurrentTransform());
}
}
void CanvasD2D::ResetTransform()
{
m_GdipGraphics->ResetTransform();
if (m_Target)
{
m_Target->SetTransform(D2D1::Matrix3x2F::Identity());
}
}
void CanvasD2D::RotateTransform(float angle, float x, float y, float dx, float dy)
{
m_GdipGraphics->TranslateTransform(x, y);
m_GdipGraphics->RotateTransform(angle);
m_GdipGraphics->TranslateTransform(dx, dy);
if (m_Target)
{
m_Target->SetTransform(GetCurrentTransform());
}
}
void CanvasD2D::SetAntiAliasing(bool enable)
{
// TODO: Set m_Target aliasing?
m_GdipGraphics->SetSmoothingMode(
enable ? Gdiplus::SmoothingModeHighQuality : Gdiplus::SmoothingModeNone);
m_GdipGraphics->SetPixelOffsetMode(
enable ? Gdiplus::PixelOffsetModeHighQuality : Gdiplus::PixelOffsetModeDefault);
}
void CanvasD2D::SetTextAntiAliasing(bool enable)
{
// TODO: Add support for D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE?
m_TextAntiAliasing = enable;
if (m_Target)
{
m_Target->SetTextAntialiasMode(
m_TextAntiAliasing ? D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE : D2D1_TEXT_ANTIALIAS_MODE_ALIASED);
}
}
void CanvasD2D::Clear(const Gdiplus::Color& color)
{
if (!m_Target) // Use GDI+ if D2D render target has not been created.
{
m_GdipGraphics->Clear(color);
return;
}
m_Target->Clear(ToColorF(color));
}
void CanvasD2D::DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect, const Gdiplus::SolidBrush& brush)
{
if (!BeginTargetDraw()) return;
Gdiplus::Color color;
brush.GetColor(&color);
ID2D1SolidColorBrush* solidBrush;
HRESULT hr = m_Target->CreateSolidColorBrush(ToColorF(color), &solidBrush);
if (SUCCEEDED(hr))
{
TextFormatD2D& formatD2D = (TextFormatD2D&)format;
const bool right = formatD2D.GetHorizontalAlignment() == Gfx::HorizontalAlignment::Right;
formatD2D.CreateLayout(str, strLen, rect.Width, rect.Height);
m_Target->DrawTextLayout(
D2D1::Point2F(right ? rect.X - 2 : rect.X + 2.0f, rect.Y - 1.0f),
formatD2D.m_TextLayout,
solidBrush);
solidBrush->Release();
}
}
bool CanvasD2D::MeasureTextW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect)
{
IDWriteTextLayout* textLayout;
HRESULT hr = c_DWFactory->CreateTextLayout(
str,
strLen,
((TextFormatD2D&)format).m_TextFormat,
10000,
10000,
&textLayout);
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
rect.Width = metrics.width + 5.0f;
rect.Height = metrics.height + 1.0f; // 1.0f to get same result as GDI+.
textLayout->Release();
return true;
}
return false;
}
bool CanvasD2D::MeasureTextLinesW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect, UINT& lines)
{
((TextFormatD2D&)format).m_TextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_WRAP);
IDWriteTextLayout* textLayout;
HRESULT hr = c_DWFactory->CreateTextLayout(
str,
strLen,
((TextFormatD2D&)format).m_TextFormat,
rect.Width,
10000,
&textLayout);
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
rect.Width = metrics.width + 5.0f;
rect.Height = metrics.height + 1.0f; // 1.0f to get same result as GDI+.
lines = metrics.lineCount;
textLayout->Release();
return true;
}
return false;
}
void CanvasD2D::DrawBitmap(Gdiplus::Bitmap* bitmap, const Gdiplus::Rect& dstRect, const Gdiplus::Rect& srcRect)
{
if (!m_Target) // Use GDI+ if D2D render target has not been created.
{
m_GdipGraphics->DrawImage(
bitmap, dstRect, srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height, Gdiplus::UnitPixel);
return;
}
// The D2D DrawBitmap seems to perform exactly like Gdiplus::Graphics::DrawImage since we are
// not using a hardware accelerated render target. Nevertheless, we will use it to avoid
// the EndDraw() call needed for GDI+ drawing.
Util::WICBitmapLockGDIP* bitmapLock = new Util::WICBitmapLockGDIP();
Gdiplus::Status status = bitmap->LockBits(
&srcRect, Gdiplus::ImageLockModeRead, PixelFormat32bppPARGB, bitmapLock->GetBitmapData());
if (status == Gdiplus::Ok)
{
D2D1_BITMAP_PROPERTIES props = D2D1::BitmapProperties(
D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED));
ID2D1Bitmap* d2dBitmap;
HRESULT hr = m_Target->CreateSharedBitmap(__uuidof(IWICBitmapLock), bitmapLock, &props, &d2dBitmap);
if (SUCCEEDED(hr))
{
auto rDst = ToRectF(dstRect);
auto rSrc = ToRectF(srcRect);
m_Target->DrawBitmap(d2dBitmap, rDst, 1.0F, D2D1_BITMAP_INTERPOLATION_MODE_LINEAR, rSrc);
d2dBitmap->Release();
}
// D2D will still use the pixel data after this call (at the next Flush() or EndDraw()).
bitmap->UnlockBits(bitmapLock->GetBitmapData());
}
bitmapLock->Release();
}
void CanvasD2D::FillRectangle(Gdiplus::Rect& rect, const Gdiplus::SolidBrush& brush)
{
if (!m_Target) // Use GDI+ if D2D render target has not been created.
{
m_GdipGraphics->FillRectangle(&brush, rect);
return;
}
Gdiplus::Color color;
brush.GetColor(&color);
ID2D1SolidColorBrush* solidBrush;
HRESULT hr = m_Target->CreateSolidColorBrush(ToColorF(color), &solidBrush);
if (SUCCEEDED(hr))
{
m_Target->FillRectangle(ToRectF(rect), solidBrush);
solidBrush->Release();
}
}
} // namespace Gfx