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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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15f0bd2461
... and simplify background rendering Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5121>
89 lines
3.5 KiB
C++
89 lines
3.5 KiB
C++
/* GStreamer
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* Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include <gst/gst.h>
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#include "gstdwrite-enums.h"
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#include "gstdwrite-effect.h"
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DEFINE_GUID (IID_IGstDWriteTextRenderer, 0xb969dc25, 0xf7d2,
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0x4cf8, 0x92, 0x0f, 0x5a, 0x27, 0xd1, 0x6d, 0x03, 0x6a);
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class IGstDWriteTextRenderer : public IDWriteTextRenderer
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{
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public:
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static STDMETHODIMP CreateInstance (IDWriteFactory * factory,
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IGstDWriteTextRenderer ** renderer);
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/* IUnknown */
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STDMETHODIMP_ (ULONG) AddRef (void);
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STDMETHODIMP_ (ULONG) Release (void);
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STDMETHODIMP QueryInterface (REFIID riid,
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void ** object);
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/* IDWritePixelSnapping */
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STDMETHODIMP IsPixelSnappingDisabled (void * context,
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BOOL * is_disabled);
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STDMETHODIMP GetCurrentTransform (void * context,
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DWRITE_MATRIX * transform);
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STDMETHODIMP GetPixelsPerDip (void * context,
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FLOAT * pixels_per_dip);
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/* IDWriteTextRenderer */
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STDMETHODIMP DrawGlyphRun (void * context,
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FLOAT origin_x,
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FLOAT origin_y,
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DWRITE_MEASURING_MODE mode,
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DWRITE_GLYPH_RUN const *glyph_run,
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DWRITE_GLYPH_RUN_DESCRIPTION const *glyph_run_desc,
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IUnknown * client_effect);
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STDMETHODIMP DrawUnderline (void * context,
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FLOAT origin_x,
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FLOAT origin_y,
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DWRITE_UNDERLINE const * underline,
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IUnknown * client_effect);
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STDMETHODIMP DrawStrikethrough (void * context,
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FLOAT origin_x,
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FLOAT origin_y,
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DWRITE_STRIKETHROUGH const * strikethrough,
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IUnknown * client_effect);
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STDMETHODIMP DrawInlineObject (void * context,
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FLOAT origin_x,
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FLOAT origin_y,
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IDWriteInlineObject * inline_object,
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BOOL is_sideways,
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BOOL is_right_to_left,
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IUnknown * client_effect);
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/* Entry point for drawing text */
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STDMETHODIMP Draw (const D2D1_POINT_2F & origin,
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const RECT & client_rect,
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IDWriteTextLayout * layout,
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ID2D1RenderTarget * target);
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private:
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IGstDWriteTextRenderer (void);
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virtual ~IGstDWriteTextRenderer (void);
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private:
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IDWriteFactory *factory_;
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ULONG ref_count_ = 1;
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};
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