1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/src/nsRenderingContext.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,149 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef NSRENDERINGCONTEXT__H__
1.10 +#define NSRENDERINGCONTEXT__H__
1.11 +
1.12 +#include <stdint.h> // for uint32_t
1.13 +#include <sys/types.h> // for int32_t
1.14 +#include "gfxContext.h" // for gfxContext
1.15 +#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
1.16 +#include "mozilla/gfx/2D.h"
1.17 +#include "mozilla/gfx/UserData.h" // for UserData, UserDataKey
1.18 +#include "nsAutoPtr.h" // for nsRefPtr
1.19 +#include "nsBoundingMetrics.h" // for nsBoundingMetrics
1.20 +#include "nsColor.h" // for nscolor
1.21 +#include "nsCoord.h" // for nscoord, NSToIntRound
1.22 +#include "nsDeviceContext.h" // for nsDeviceContext
1.23 +#include "nsFontMetrics.h" // for nsFontMetrics
1.24 +#include "nsISupports.h" // for NS_INLINE_DECL_REFCOUNTING, etc
1.25 +#include "nsString.h" // for nsString
1.26 +#include "nscore.h" // for char16_t
1.27 +
1.28 +class gfxASurface;
1.29 +class nsIntRegion;
1.30 +struct nsPoint;
1.31 +struct nsRect;
1.32 +
1.33 +typedef enum {
1.34 + nsLineStyle_kNone = 0,
1.35 + nsLineStyle_kSolid = 1,
1.36 + nsLineStyle_kDashed = 2,
1.37 + nsLineStyle_kDotted = 3
1.38 +} nsLineStyle;
1.39 +
1.40 +class nsRenderingContext MOZ_FINAL
1.41 +{
1.42 + typedef mozilla::gfx::UserData UserData;
1.43 + typedef mozilla::gfx::UserDataKey UserDataKey;
1.44 + typedef mozilla::gfx::DrawTarget DrawTarget;
1.45 +
1.46 +public:
1.47 + nsRenderingContext() : mP2A(0.) {}
1.48 +
1.49 + NS_INLINE_DECL_REFCOUNTING(nsRenderingContext)
1.50 +
1.51 + void Init(nsDeviceContext* aContext, gfxASurface* aThebesSurface);
1.52 + void Init(nsDeviceContext* aContext, gfxContext* aThebesContext);
1.53 + void Init(nsDeviceContext* aContext, DrawTarget* aDrawTarget);
1.54 +
1.55 + // These accessors will never return null.
1.56 + gfxContext *ThebesContext() { return mThebes; }
1.57 + DrawTarget *GetDrawTarget() { return mThebes->GetDrawTarget(); }
1.58 + nsDeviceContext *DeviceContext() { return mDeviceContext; }
1.59 + int32_t AppUnitsPerDevPixel() { return NSToIntRound(mP2A); }
1.60 +
1.61 + // Graphics state
1.62 +
1.63 + void PushState(void);
1.64 + void PopState(void);
1.65 + void IntersectClip(const nsRect& aRect);
1.66 + void SetClip(const nsIntRegion& aRegion);
1.67 + void SetLineStyle(nsLineStyle aLineStyle);
1.68 + void SetColor(nscolor aColor);
1.69 + void Translate(const nsPoint& aPt);
1.70 + void Scale(float aSx, float aSy);
1.71 +
1.72 + class AutoPushTranslation {
1.73 + nsRenderingContext* mCtx;
1.74 + public:
1.75 + AutoPushTranslation(nsRenderingContext* aCtx, const nsPoint& aPt)
1.76 + : mCtx(aCtx) {
1.77 + mCtx->PushState();
1.78 + mCtx->Translate(aPt);
1.79 + }
1.80 + ~AutoPushTranslation() {
1.81 + mCtx->PopState();
1.82 + }
1.83 + };
1.84 +
1.85 + // Shapes
1.86 +
1.87 + void DrawLine(const nsPoint& aStartPt, const nsPoint& aEndPt);
1.88 + void DrawLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1);
1.89 + void DrawRect(const nsRect& aRect);
1.90 + void DrawRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
1.91 + void DrawEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
1.92 +
1.93 + void FillRect(const nsRect& aRect);
1.94 + void FillRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
1.95 + void FillPolygon(const nsPoint aPoints[], int32_t aNumPoints);
1.96 +
1.97 + void FillEllipse(const nsRect& aRect);
1.98 + void FillEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
1.99 +
1.100 + void InvertRect(const nsRect& aRect);
1.101 +
1.102 + // Text
1.103 +
1.104 + void SetFont(nsFontMetrics *aFontMetrics);
1.105 + nsFontMetrics *FontMetrics() { return mFontMetrics; } // may be null
1.106 +
1.107 + void SetTextRunRTL(bool aIsRTL);
1.108 +
1.109 + nscoord GetWidth(char aC);
1.110 + nscoord GetWidth(char16_t aC);
1.111 + nscoord GetWidth(const nsString& aString);
1.112 + nscoord GetWidth(const char* aString);
1.113 + nscoord GetWidth(const char* aString, uint32_t aLength);
1.114 + nscoord GetWidth(const char16_t *aString, uint32_t aLength);
1.115 +
1.116 + nsBoundingMetrics GetBoundingMetrics(const char16_t *aString,
1.117 + uint32_t aLength);
1.118 +
1.119 + void DrawString(const nsString& aString, nscoord aX, nscoord aY);
1.120 + void DrawString(const char *aString, uint32_t aLength,
1.121 + nscoord aX, nscoord aY);
1.122 + void DrawString(const char16_t *aString, uint32_t aLength,
1.123 + nscoord aX, nscoord aY);
1.124 +
1.125 + void AddUserData(UserDataKey *key, void *userData, void (*destroy)(void*)) {
1.126 + mUserData.Add(key, userData, destroy);
1.127 + }
1.128 + void *GetUserData(UserDataKey *key) {
1.129 + return mUserData.Get(key);
1.130 + }
1.131 + void *RemoveUserData(UserDataKey *key) {
1.132 + return mUserData.Remove(key);
1.133 + }
1.134 +
1.135 +private:
1.136 + // Private destructor, to discourage deletion outside of Release():
1.137 + ~nsRenderingContext()
1.138 + {
1.139 + }
1.140 +
1.141 + int32_t GetMaxChunkLength();
1.142 +
1.143 + nsRefPtr<gfxContext> mThebes;
1.144 + nsRefPtr<nsDeviceContext> mDeviceContext;
1.145 + nsRefPtr<nsFontMetrics> mFontMetrics;
1.146 +
1.147 + double mP2A; // cached app units per device pixel value
1.148 +
1.149 + UserData mUserData;
1.150 +};
1.151 +
1.152 +#endif // NSRENDERINGCONTEXT__H__
