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comparison: gfx/src/nsRenderingContext.h
gfx/src/nsRenderingContext.h
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| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef NSRENDERINGCONTEXT__H__ | |
| 7 #define NSRENDERINGCONTEXT__H__ | |
| 8 | |
| 9 #include <stdint.h> // for uint32_t | |
| 10 #include <sys/types.h> // for int32_t | |
| 11 #include "gfxContext.h" // for gfxContext | |
| 12 #include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2 | |
| 13 #include "mozilla/gfx/2D.h" | |
| 14 #include "mozilla/gfx/UserData.h" // for UserData, UserDataKey | |
| 15 #include "nsAutoPtr.h" // for nsRefPtr | |
| 16 #include "nsBoundingMetrics.h" // for nsBoundingMetrics | |
| 17 #include "nsColor.h" // for nscolor | |
| 18 #include "nsCoord.h" // for nscoord, NSToIntRound | |
| 19 #include "nsDeviceContext.h" // for nsDeviceContext | |
| 20 #include "nsFontMetrics.h" // for nsFontMetrics | |
| 21 #include "nsISupports.h" // for NS_INLINE_DECL_REFCOUNTING, etc | |
| 22 #include "nsString.h" // for nsString | |
| 23 #include "nscore.h" // for char16_t | |
| 24 | |
| 25 class gfxASurface; | |
| 26 class nsIntRegion; | |
| 27 struct nsPoint; | |
| 28 struct nsRect; | |
| 29 | |
| 30 typedef enum { | |
| 31 nsLineStyle_kNone = 0, | |
| 32 nsLineStyle_kSolid = 1, | |
| 33 nsLineStyle_kDashed = 2, | |
| 34 nsLineStyle_kDotted = 3 | |
| 35 } nsLineStyle; | |
| 36 | |
| 37 class nsRenderingContext MOZ_FINAL | |
| 38 { | |
| 39 typedef mozilla::gfx::UserData UserData; | |
| 40 typedef mozilla::gfx::UserDataKey UserDataKey; | |
| 41 typedef mozilla::gfx::DrawTarget DrawTarget; | |
| 42 | |
| 43 public: | |
| 44 nsRenderingContext() : mP2A(0.) {} | |
| 45 | |
| 46 NS_INLINE_DECL_REFCOUNTING(nsRenderingContext) | |
| 47 | |
| 48 void Init(nsDeviceContext* aContext, gfxASurface* aThebesSurface); | |
| 49 void Init(nsDeviceContext* aContext, gfxContext* aThebesContext); | |
| 50 void Init(nsDeviceContext* aContext, DrawTarget* aDrawTarget); | |
| 51 | |
| 52 // These accessors will never return null. | |
| 53 gfxContext *ThebesContext() { return mThebes; } | |
| 54 DrawTarget *GetDrawTarget() { return mThebes->GetDrawTarget(); } | |
| 55 nsDeviceContext *DeviceContext() { return mDeviceContext; } | |
| 56 int32_t AppUnitsPerDevPixel() { return NSToIntRound(mP2A); } | |
| 57 | |
| 58 // Graphics state | |
| 59 | |
| 60 void PushState(void); | |
| 61 void PopState(void); | |
| 62 void IntersectClip(const nsRect& aRect); | |
| 63 void SetClip(const nsIntRegion& aRegion); | |
| 64 void SetLineStyle(nsLineStyle aLineStyle); | |
| 65 void SetColor(nscolor aColor); | |
| 66 void Translate(const nsPoint& aPt); | |
| 67 void Scale(float aSx, float aSy); | |
| 68 | |
| 69 class AutoPushTranslation { | |
| 70 nsRenderingContext* mCtx; | |
| 71 public: | |
| 72 AutoPushTranslation(nsRenderingContext* aCtx, const nsPoint& aPt) | |
| 73 : mCtx(aCtx) { | |
| 74 mCtx->PushState(); | |
| 75 mCtx->Translate(aPt); | |
| 76 } | |
| 77 ~AutoPushTranslation() { | |
| 78 mCtx->PopState(); | |
| 79 } | |
| 80 }; | |
| 81 | |
| 82 // Shapes | |
| 83 | |
| 84 void DrawLine(const nsPoint& aStartPt, const nsPoint& aEndPt); | |
| 85 void DrawLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1); | |
| 86 void DrawRect(const nsRect& aRect); | |
| 87 void DrawRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight); | |
| 88 void DrawEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight); | |
| 89 | |
| 90 void FillRect(const nsRect& aRect); | |
| 91 void FillRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight); | |
| 92 void FillPolygon(const nsPoint aPoints[], int32_t aNumPoints); | |
| 93 | |
| 94 void FillEllipse(const nsRect& aRect); | |
| 95 void FillEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight); | |
| 96 | |
| 97 void InvertRect(const nsRect& aRect); | |
| 98 | |
| 99 // Text | |
| 100 | |
| 101 void SetFont(nsFontMetrics *aFontMetrics); | |
| 102 nsFontMetrics *FontMetrics() { return mFontMetrics; } // may be null | |
| 103 | |
| 104 void SetTextRunRTL(bool aIsRTL); | |
| 105 | |
| 106 nscoord GetWidth(char aC); | |
| 107 nscoord GetWidth(char16_t aC); | |
| 108 nscoord GetWidth(const nsString& aString); | |
| 109 nscoord GetWidth(const char* aString); | |
| 110 nscoord GetWidth(const char* aString, uint32_t aLength); | |
| 111 nscoord GetWidth(const char16_t *aString, uint32_t aLength); | |
| 112 | |
| 113 nsBoundingMetrics GetBoundingMetrics(const char16_t *aString, | |
| 114 uint32_t aLength); | |
| 115 | |
| 116 void DrawString(const nsString& aString, nscoord aX, nscoord aY); | |
| 117 void DrawString(const char *aString, uint32_t aLength, | |
| 118 nscoord aX, nscoord aY); | |
| 119 void DrawString(const char16_t *aString, uint32_t aLength, | |
| 120 nscoord aX, nscoord aY); | |
| 121 | |
| 122 void AddUserData(UserDataKey *key, void *userData, void (*destroy)(void*)) { | |
| 123 mUserData.Add(key, userData, destroy); | |
| 124 } | |
| 125 void *GetUserData(UserDataKey *key) { | |
| 126 return mUserData.Get(key); | |
| 127 } | |
| 128 void *RemoveUserData(UserDataKey *key) { | |
| 129 return mUserData.Remove(key); | |
| 130 } | |
| 131 | |
| 132 private: | |
| 133 // Private destructor, to discourage deletion outside of Release(): | |
| 134 ~nsRenderingContext() | |
| 135 { | |
| 136 } | |
| 137 | |
| 138 int32_t GetMaxChunkLength(); | |
| 139 | |
| 140 nsRefPtr<gfxContext> mThebes; | |
| 141 nsRefPtr<nsDeviceContext> mDeviceContext; | |
| 142 nsRefPtr<nsFontMetrics> mFontMetrics; | |
| 143 | |
| 144 double mP2A; // cached app units per device pixel value | |
| 145 | |
| 146 UserData mUserData; | |
| 147 }; | |
| 148 | |
| 149 #endif // NSRENDERINGCONTEXT__H__ |
