1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "android/graphics/canvas.h"
18
19 #include "TypeCast.h"
20 #include "GraphicsJNI.h"
21
22 #include <hwui/Canvas.h>
23 #include <utils/Color.h>
24
25 #include <SkBitmap.h>
26 #include <SkSurface.h>
27
28 using namespace android;
29
30 /*
31 * Converts a buffer and dataspace into an SkBitmap only if the resulting bitmap can be treated as a
32 * rendering destination for a Canvas. If the buffer is null or the format is one that we cannot
33 * render into with a Canvas then false is returned and the outBitmap param is unmodified.
34 */
convert(const ANativeWindow_Buffer * buffer,int32_t dataspace,SkBitmap * outBitmap)35 static bool convert(const ANativeWindow_Buffer* buffer,
36 int32_t /*android_dataspace_t*/ dataspace,
37 SkBitmap* outBitmap) {
38 if (buffer == nullptr) {
39 return false;
40 }
41
42 sk_sp<SkColorSpace> cs(uirenderer::DataSpaceToColorSpace((android_dataspace)dataspace));
43 SkImageInfo imageInfo = uirenderer::ANativeWindowToImageInfo(*buffer, cs);
44 size_t rowBytes = buffer->stride * imageInfo.bytesPerPixel();
45
46 // If SkSurface::MakeRasterDirect fails then we should as well as we will not be able to
47 // draw into the canvas.
48 sk_sp<SkSurface> surface = SkSurface::MakeRasterDirect(imageInfo, buffer->bits, rowBytes);
49 if (surface.get() != nullptr) {
50 if (outBitmap) {
51 outBitmap->setInfo(imageInfo, rowBytes);
52 outBitmap->setPixels(buffer->bits);
53 }
54 return true;
55 }
56 return false;
57 }
58
ACanvas_isSupportedPixelFormat(int32_t bufferFormat)59 bool ACanvas_isSupportedPixelFormat(int32_t bufferFormat) {
60 char pixels[8];
61 ANativeWindow_Buffer buffer { 1, 1, 1, bufferFormat, pixels, {0} };
62 return convert(&buffer, HAL_DATASPACE_UNKNOWN, nullptr);
63 }
64
ACanvas_getNativeHandleFromJava(JNIEnv * env,jobject canvasObj)65 ACanvas* ACanvas_getNativeHandleFromJava(JNIEnv* env, jobject canvasObj) {
66 return TypeCast::toACanvas(GraphicsJNI::getNativeCanvas(env, canvasObj));
67 }
68
ACanvas_createCanvas(const ANativeWindow_Buffer * buffer,int32_t dataspace)69 ACanvas* ACanvas_createCanvas(const ANativeWindow_Buffer* buffer,
70 int32_t /*android_dataspace_t*/ dataspace) {
71 SkBitmap bitmap;
72 bool isValidBuffer = convert(buffer, dataspace, &bitmap);
73 return isValidBuffer ? TypeCast::toACanvas(Canvas::create_canvas(bitmap)) : nullptr;
74 }
75
ACanvas_destroyCanvas(ACanvas * canvas)76 void ACanvas_destroyCanvas(ACanvas* canvas) {
77 delete TypeCast::toCanvas(canvas);
78 }
79
ACanvas_setBuffer(ACanvas * canvas,const ANativeWindow_Buffer * buffer,int32_t dataspace)80 bool ACanvas_setBuffer(ACanvas* canvas, const ANativeWindow_Buffer* buffer,
81 int32_t /*android_dataspace_t*/ dataspace) {
82 SkBitmap bitmap;
83 bool isValidBuffer = (buffer == nullptr) ? false : convert(buffer, dataspace, &bitmap);
84 TypeCast::toCanvas(canvas)->setBitmap(bitmap);
85 return isValidBuffer;
86 }
87
ACanvas_clipRect(ACanvas * canvas,const ARect * clipRect,bool)88 void ACanvas_clipRect(ACanvas* canvas, const ARect* clipRect, bool /*doAA*/) {
89 //TODO update Canvas to take antialias param
90 TypeCast::toCanvas(canvas)->clipRect(clipRect->left, clipRect->top, clipRect->right,
91 clipRect->bottom, SkClipOp::kIntersect);
92 }
93
ACanvas_clipOutRect(ACanvas * canvas,const ARect * clipRect,bool)94 void ACanvas_clipOutRect(ACanvas* canvas, const ARect* clipRect, bool /*doAA*/) {
95 //TODO update Canvas to take antialias param
96 TypeCast::toCanvas(canvas)->clipRect(clipRect->left, clipRect->top, clipRect->right,
97 clipRect->bottom, SkClipOp::kDifference);
98 }
99
ACanvas_drawRect(ACanvas * canvas,const ARect * rect,const APaint * paint)100 void ACanvas_drawRect(ACanvas* canvas, const ARect* rect, const APaint* paint) {
101 TypeCast::toCanvas(canvas)->drawRect(rect->left, rect->top, rect->right, rect->bottom,
102 TypeCast::toPaintRef(paint));
103 }
104
ACanvas_drawBitmap(ACanvas * canvas,const ABitmap * bitmap,float left,float top,const APaint * paint)105 void ACanvas_drawBitmap(ACanvas* canvas, const ABitmap* bitmap, float left, float top,
106 const APaint* paint) {
107 TypeCast::toCanvas(canvas)->drawBitmap(TypeCast::toBitmapRef(bitmap), left, top,
108 TypeCast::toPaint(paint));
109 }
110