1/*
2 * Copyright 2016 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 "GrBitmapTextureMaker.h"
9
10#include "GrContext.h"
11#include "GrGpuResourcePriv.h"
12#include "GrResourceProvider.h"
13#include "SkBitmap.h"
14#include "SkGr.h"
15#include "SkPixelRef.h"
16
17static bool bmp_is_alpha_only(const SkBitmap& bm) { return kAlpha_8_SkColorType == bm.colorType(); }
18
19GrBitmapTextureMaker::GrBitmapTextureMaker(GrContext* context, const SkBitmap& bitmap)
20    : INHERITED(context, bitmap.width(), bitmap.height(), bmp_is_alpha_only(bitmap))
21    , fBitmap(bitmap) {
22    if (!bitmap.isVolatile()) {
23        SkIPoint origin = bitmap.pixelRefOrigin();
24        SkIRect subset = SkIRect::MakeXYWH(origin.fX, origin.fY, bitmap.width(),
25                                           bitmap.height());
26        GrMakeKeyFromImageID(&fOriginalKey, bitmap.pixelRef()->getGenerationID(), subset);
27    }
28}
29
30sk_sp<GrTextureProxy> GrBitmapTextureMaker::refOriginalTextureProxy(bool willBeMipped,
31                                                                    SkColorSpace* dstColorSpace,
32                                                                    AllowedTexGenType onlyIfFast) {
33    if (AllowedTexGenType::kCheap == onlyIfFast) {
34        return nullptr;
35    }
36
37    sk_sp<GrTextureProxy> proxy;
38
39    if (fOriginalKey.isValid()) {
40        proxy = this->context()->resourceProvider()->findProxyByUniqueKey(fOriginalKey);
41        if (proxy) {
42            return proxy;
43        }
44    }
45    if (willBeMipped) {
46        proxy = GrGenerateMipMapsAndUploadToTextureProxy(this->context(), fBitmap, dstColorSpace);
47    }
48    if (!proxy) {
49        proxy = GrUploadBitmapToTextureProxy(this->context()->resourceProvider(), fBitmap,
50                                             dstColorSpace);
51    }
52    if (proxy && fOriginalKey.isValid()) {
53        this->context()->resourceProvider()->assignUniqueKeyToProxy(fOriginalKey, proxy.get());
54        // MDB TODO (caching): this has to play nice with the GrSurfaceProxy's caching
55        GrInstallBitmapUniqueKeyInvalidator(fOriginalKey, fBitmap.pixelRef());
56    }
57    return proxy;
58}
59
60void GrBitmapTextureMaker::makeCopyKey(const CopyParams& copyParams, GrUniqueKey* copyKey,
61                                       SkColorSpace* dstColorSpace) {
62    // Destination color space is irrelevant - we always upload the bitmap's contents as-is
63    if (fOriginalKey.isValid()) {
64        MakeCopyKeyFromOrigKey(fOriginalKey, copyParams, copyKey);
65    }
66}
67
68void GrBitmapTextureMaker::didCacheCopy(const GrUniqueKey& copyKey) {
69    GrInstallBitmapUniqueKeyInvalidator(copyKey, fBitmap.pixelRef());
70}
71
72SkAlphaType GrBitmapTextureMaker::alphaType() const {
73    return fBitmap.alphaType();
74}
75
76sk_sp<SkColorSpace> GrBitmapTextureMaker::getColorSpace(SkColorSpace* dstColorSpace) {
77    // Color space doesn't depend on destination color space - it's just whatever is in the bitmap
78    return fBitmap.refColorSpace();
79}
80