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| 1 /* |
| 2 * Copyright 2015 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "org_skia_canvasproof_GaneshPictureRenderer.h" |
| 9 |
| 10 #include "GrContext.h" |
| 11 #include "JavaInputStream.h" |
| 12 #include "SkCanvas.h" |
| 13 #include "SkMatrix.h" |
| 14 #include "SkPicture.h" |
| 15 #include "SkRect.h" |
| 16 #include "SkStream.h" |
| 17 #include "SkSurface.h" |
| 18 |
| 19 #define TAG "GaneshPictureRenderer.cpp: " |
| 20 |
| 21 static void render_picture(GrContext* grContext, |
| 22 int width, |
| 23 int height, |
| 24 const SkPicture* picture, |
| 25 const SkMatrix& matrix) { |
| 26 SkASSERT(grContext); |
| 27 if (!picture) { |
| 28 SkDebugf(TAG "!picture\n"); |
| 29 return; |
| 30 } |
| 31 // Render to the default framebuffer render target. |
| 32 GrBackendRenderTargetDesc desc; |
| 33 desc.fWidth = width; |
| 34 desc.fHeight = height; |
| 35 desc.fConfig = kSkia8888_GrPixelConfig; |
| 36 desc.fOrigin = kBottomLeft_GrSurfaceOrigin; |
| 37 SkSurfaceProps surfaceProps(SkSurfaceProps::kUseDeviceIndependentFonts_Flag, |
| 38 kUnknown_SkPixelGeometry); |
| 39 // TODO: Check to see if we can keep the surface between draw calls. |
| 40 SkAutoTUnref<SkSurface> surface( |
| 41 SkSurface::NewFromBackendRenderTarget( |
| 42 grContext, desc, &surfaceProps)); |
| 43 if (surface) { |
| 44 SkCanvas* canvas = surface->getCanvas(); |
| 45 SkASSERT(canvas); |
| 46 canvas->clear(SK_ColorGRAY); |
| 47 canvas->concat(matrix); |
| 48 SkRect cullRect = picture->cullRect(); |
| 49 canvas->clipRect(cullRect); |
| 50 picture->playback(canvas); |
| 51 canvas->flush(); |
| 52 } |
| 53 } |
| 54 |
| 55 namespace { |
| 56 struct GaneshPictureRendererImpl { |
| 57 SkAutoTUnref<GrContext> fGrContext; |
| 58 void render(int w, int h, const SkPicture* p, const SkMatrix& m) { |
| 59 if (!fGrContext) { |
| 60 // Cache the rendering context between frames. |
| 61 fGrContext.reset(GrContext::Create(kOpenGL_GrBackend, 0)); |
| 62 if (!fGrContext) { |
| 63 SkDebugf(TAG "GrContext::Create - failed\n"); |
| 64 return; |
| 65 } |
| 66 } |
| 67 render_picture(fGrContext, w, h, p, m); |
| 68 } |
| 69 }; |
| 70 } // namespace |
| 71 |
| 72 /* |
| 73 * Class: org_skia_canvasproof_GaneshPictureRenderer |
| 74 * Method: DrawThisFrame |
| 75 * Signature: (IIFJ)V |
| 76 */ |
| 77 JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_DrawThisF
rame( |
| 78 JNIEnv*, jclass, jint width, jint height, jfloat scale, jlong ptr, jlong
pic) { |
| 79 if (!ptr) { return; } |
| 80 SkMatrix matrix = SkMatrix::MakeScale((SkScalar)scale); |
| 81 GaneshPictureRendererImpl* impl = |
| 82 reinterpret_cast<GaneshPictureRendererImpl*>(ptr); |
| 83 SkPicture* picture = reinterpret_cast<SkPicture*>(pic); |
| 84 impl->render((int)width, (int)height, picture, matrix); |
| 85 } |
| 86 |
| 87 /* |
| 88 * Class: org_skia_canvasproof_GaneshPictureRenderer |
| 89 * Method: Ctor |
| 90 * Signature: ()J |
| 91 */ |
| 92 JNIEXPORT jlong JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_Ctor |
| 93 (JNIEnv *, jclass) { |
| 94 return reinterpret_cast<jlong>(new GaneshPictureRendererImpl); |
| 95 } |
| 96 |
| 97 /* |
| 98 * Class: org_skia_canvasproof_GaneshPictureRenderer |
| 99 * Method: CleanUp |
| 100 * Signature: (J)V |
| 101 */ |
| 102 JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_CleanUp |
| 103 (JNIEnv *, jclass, jlong ptr) { |
| 104 delete reinterpret_cast<GaneshPictureRendererImpl*>(ptr); |
| 105 } |
| 106 |
| 107 namespace { |
| 108 struct AndroidRectHelper { |
| 109 jfieldID fLeft, fTop, fRight, fBottom; |
| 110 AndroidRectHelper() |
| 111 : fLeft(nullptr), fTop(nullptr), fRight(nullptr), fBottom(nullptr) {} |
| 112 void config(JNIEnv *env) { |
| 113 if (!fLeft) { |
| 114 jclass rectClass = env->FindClass("android/graphics/Rect"); |
| 115 SkASSERT(rectClass); |
| 116 fLeft = env->GetFieldID(rectClass, "left", "I"); |
| 117 fTop = env->GetFieldID(rectClass, "top", "I"); |
| 118 fRight = env->GetFieldID(rectClass, "right", "I"); |
| 119 fBottom = env->GetFieldID(rectClass, "bottom", "I"); |
| 120 } |
| 121 } |
| 122 }; |
| 123 } // namespace |
| 124 |
| 125 /* |
| 126 * Class: org_skia_canvasproof_GaneshPictureRenderer |
| 127 * Method: GetCullRect |
| 128 * Signature: (Landroid/graphics/Rect;J)V |
| 129 */ |
| 130 JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_GetCullRe
ct |
| 131 (JNIEnv *env, jclass, jobject androidGraphicsRect, jlong picturePtr) { |
| 132 SkASSERT(androidGraphicsRect); |
| 133 const SkPicture* picture = reinterpret_cast<SkPicture*>(picturePtr); |
| 134 SkRect rect = SkRect::MakeEmpty(); |
| 135 if (picture) { |
| 136 rect = picture->cullRect(); |
| 137 } |
| 138 SkIRect iRect; |
| 139 rect.roundOut(&iRect); |
| 140 static AndroidRectHelper help; |
| 141 help.config(env); |
| 142 env->SetIntField(androidGraphicsRect, help.fLeft, (jint)(iRect.left())); |
| 143 env->SetIntField(androidGraphicsRect, help.fTop, (jint)(iRect.top())); |
| 144 env->SetIntField(androidGraphicsRect, help.fRight, (jint)(iRect.right())); |
| 145 env->SetIntField(androidGraphicsRect, help.fBottom, (jint)(iRect.bottom())); |
| 146 } |
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