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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_ |
| 6 #define CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_ |
| 7 |
| 8 #include <documentsource.h> |
| 9 #include <printpreview.h> |
| 10 #include <windows.graphics.printing.h> |
| 11 |
| 12 #include <vector> |
| 13 |
| 14 #include "base/basictypes.h" |
| 15 #include "base/memory/ref_counted.h" |
| 16 #include "base/memory/scoped_ptr.h" |
| 17 #include "base/synchronization/condition_variable.h" |
| 18 #include "base/synchronization/waitable_event.h" |
| 19 #include "win8/metro_driver/winrt_utils.h" |
| 20 |
| 21 // Hack to be removed once we don't need to build with an SDK earlier than |
| 22 // 8441 where the name of the interface has been changed. |
| 23 // TODO(mad): remove once we don't run mixed SDK/OS anymore. |
| 24 #ifndef __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__ |
| 25 typedef IPrintPreviewDXGIPackageTarget IPrintPreviewDxgiPackageTarget; |
| 26 #endif |
| 27 |
| 28 |
| 29 namespace base { |
| 30 class Lock; |
| 31 }; // namespace base |
| 32 |
| 33 namespace metro_driver { |
| 34 |
| 35 // This class is given to Metro as a source for print documents. |
| 36 // The methodless IPrintDocumentSource interface is used to identify it as such. |
| 37 // Then, the other interfaces are used to generate preview and print documents. |
| 38 // It also exposes a few methods for the print handler to control the document. |
| 39 class PrintDocumentSource |
| 40 : public mswr::RuntimeClass< |
| 41 mswr::RuntimeClassFlags<mswr::WinRtClassicComMix>, |
| 42 wingfx::Printing::IPrintDocumentSource, |
| 43 IPrintDocumentPageSource, |
| 44 IPrintPreviewPageCollection> { |
| 45 public: |
| 46 // A set of interfaces for the DirectX context that our parent owns |
| 47 // and that don't need to change from document to document. |
| 48 struct DirectXContext { |
| 49 DirectXContext() {} |
| 50 DirectXContext(ID3D11Device1* device_3d, |
| 51 ID2D1Factory1* factory_2d, |
| 52 ID2D1Device* device_2d, |
| 53 ID2D1DeviceContext* context_2d, |
| 54 IWICImagingFactory2* factory_wic) |
| 55 : d3d_device(device_3d), |
| 56 d2d_factory(factory_2d), |
| 57 d2d_device(device_2d), |
| 58 d2d_context(context_2d), |
| 59 wic_factory(factory_wic) { |
| 60 } |
| 61 DirectXContext(const DirectXContext& other) |
| 62 : d3d_device(other.d3d_device), |
| 63 d2d_factory(other.d2d_factory), |
| 64 d2d_device(other.d2d_device), |
| 65 d2d_context(other.d2d_context), |
| 66 wic_factory(other.wic_factory) { |
| 67 } |
| 68 mswr::ComPtr<ID3D11Device1> d3d_device; |
| 69 mswr::ComPtr<ID2D1Factory1> d2d_factory; |
| 70 mswr::ComPtr<ID2D1Device> d2d_device; |
| 71 mswr::ComPtr<ID2D1DeviceContext> d2d_context; |
| 72 mswr::ComPtr<IWICImagingFactory2> wic_factory; |
| 73 }; |
| 74 |
| 75 // Construction / Initialization. |
| 76 explicit PrintDocumentSource(); |
| 77 HRESULT RuntimeClassInitialize(const DirectXContext& directx_context, |
| 78 base::Lock* parent_lock); |
| 79 // Aborts any pending asynchronous operation. |
| 80 void Abort(); |
| 81 |
| 82 // classic COM interface IPrintDocumentPageSource methods |
| 83 STDMETHOD(GetPreviewPageCollection) ( |
| 84 IPrintDocumentPackageTarget* package_target, |
| 85 IPrintPreviewPageCollection** page_collection); |
| 86 STDMETHOD(MakeDocument)(IInspectable* options, |
| 87 IPrintDocumentPackageTarget* package_target); |
| 88 |
| 89 // classic COM interface IPrintPreviewPageCollection methods |
| 90 STDMETHOD(Paginate)(uint32 page, IInspectable* options); |
| 91 STDMETHOD(MakePage)(uint32 desired_page, float width, float height); |
| 92 |
| 93 // If the screen DPI changes, we must be warned here. |
| 94 void ResetDpi(float dpi); |
| 95 |
| 96 // When the page count is known, this is called and we can setup our data. |
| 97 void SetPageCount(size_t page_count); |
| 98 |
| 99 // Every time a page is ready, this is called and we can read the data if |
| 100 // we were waiting for it, or store it for later use. |
| 101 void AddPage(size_t page_number, IStream* metafile_stream); |
| 102 |
| 103 private: |
| 104 // Print the page given in the metafile stream to the given print control. |
| 105 HRESULT PrintPage(ID2D1PrintControl* print_control, |
| 106 ID2D1GdiMetafile* metafile_stream, |
| 107 D2D1_SIZE_F pageSize); |
| 108 |
| 109 // Helper function to wait for the page count to be ready. |
| 110 // Returns 0 when aborted. |
| 111 size_t WaitAndGetPageCount(); |
| 112 |
| 113 // Helper function to wait for a given page to be ready. |
| 114 // Returns S_FALSE when aborted. |
| 115 HRESULT WaitAndGetPage(size_t page_number, |
| 116 ID2D1GdiMetafile** metafile_stream); |
| 117 |
| 118 DirectXContext directx_context_; |
| 119 |
| 120 // Once page data is available, it's added to this vector. |
| 121 std::vector<mswr::ComPtr<IStream>> pages_; |
| 122 |
| 123 // When page count is set, the size of this vector is set to that number. |
| 124 // Then, every time page data is added to pages_, the associated condition |
| 125 // variable in this vector is signaled. This is only filled when we receive |
| 126 // the page count, so we must wait on page_count_ready_ before accessing |
| 127 // the content of this vector. |
| 128 std::vector<scoped_ptr<base::ConditionVariable> > pages_ready_state_; |
| 129 |
| 130 // This event is signaled when we receive a page count from Chrome. We should |
| 131 // not receive any page data before the count, so we can check this event |
| 132 // while waiting for pages too, in case we ask for page data before we got |
| 133 // the count, so before we properly initialized pages_ready_state_. |
| 134 base::WaitableEvent page_count_ready_; |
| 135 |
| 136 // The preview target interface set from within GetPreviewPageCollection |
| 137 // but used from within MakePage. |
| 138 mswr::ComPtr<IPrintPreviewDxgiPackageTarget> dxgi_preview_target_; |
| 139 |
| 140 // Our parent's lock (to make sure it is initialized and destroyed early |
| 141 // enough), which we use to protect access to our data members. |
| 142 base::Lock* parent_lock_; |
| 143 |
| 144 // The width/height requested in Paginate and used in MakePage. |
| 145 // TODO(mad): Height is currently not used, and width is only used for |
| 146 // scaling. We need to add a way to specify width and height when we request |
| 147 // pages from Chrome. |
| 148 float height_; |
| 149 float width_; |
| 150 |
| 151 // The DPI is set by Windows and we need to give it to DirectX. |
| 152 float dpi_; |
| 153 |
| 154 // A flag identiying that we have been aborted. Needed to properly handle |
| 155 // asynchronous callbacks. |
| 156 bool aborted_; |
| 157 |
| 158 // TODO(mad): remove once we don't run mixed SDK/OS anymore. |
| 159 bool using_old_preview_interface_; |
| 160 }; |
| 161 |
| 162 } // namespace metro_driver |
| 163 |
| 164 #endif // CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_ |
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