aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/image/SkSurface_Gpu.cpp
blob: 143a6039f0e9209786c948b9b6a62f4342bcc5cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
/*
 * Copyright 2012 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkSurface_Gpu.h"

#include "GrBackendSurface.h"
#include "GrContextPriv.h"
#include "GrRenderTargetContextPriv.h"
#include "GrTexture.h"

#include "SkCanvas.h"
#include "SkColorSpace_Base.h"
#include "SkGpuDevice.h"
#include "SkImage_Base.h"
#include "SkImage_Gpu.h"
#include "SkImagePriv.h"
#include "SkSurface_Base.h"

#if SK_SUPPORT_GPU

SkSurface_Gpu::SkSurface_Gpu(sk_sp<SkGpuDevice> device)
    : INHERITED(device->width(), device->height(), &device->surfaceProps())
    , fDevice(std::move(device)) {
    SkASSERT(fDevice->accessRenderTargetContext()->asSurfaceProxy()->priv().isExact());
}

SkSurface_Gpu::~SkSurface_Gpu() {
}

static GrRenderTarget* prepare_rt_for_external_access(SkSurface_Gpu* surface,
                                                      SkSurface::BackendHandleAccess access) {
    switch (access) {
        case SkSurface::kFlushRead_BackendHandleAccess:
            break;
        case SkSurface::kFlushWrite_BackendHandleAccess:
        case SkSurface::kDiscardWrite_BackendHandleAccess:
            // for now we don't special-case on Discard, but we may in the future.
            surface->notifyContentWillChange(SkSurface::kRetain_ContentChangeMode);
            break;
    }

    // Grab the render target *after* firing notifications, as it may get switched if CoW kicks in.
    surface->getDevice()->flush();
    GrRenderTargetContext* rtc = surface->getDevice()->accessRenderTargetContext();
    return rtc->accessRenderTarget();
}

GrBackendObject SkSurface_Gpu::onGetTextureHandle(BackendHandleAccess access) {
    GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
    if (!rt) {
        return 0;
    }
    GrTexture* texture = rt->asTexture();
    if (texture) {
        return texture->getTextureHandle();
    }
    return 0;
}

bool SkSurface_Gpu::onGetRenderTargetHandle(GrBackendObject* obj, BackendHandleAccess access) {
    GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
    if (!rt) {
        return false;
    }
    *obj = rt->getRenderTargetHandle();
    return true;
}

SkCanvas* SkSurface_Gpu::onNewCanvas() {
    SkCanvas::InitFlags flags = SkCanvas::kDefault_InitFlags;
    flags = static_cast<SkCanvas::InitFlags>(flags | SkCanvas::kConservativeRasterClip_InitFlag);

    return new SkCanvas(fDevice.get(), flags);
}

sk_sp<SkSurface> SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
    int sampleCount = fDevice->accessRenderTargetContext()->numColorSamples();
    GrSurfaceOrigin origin = fDevice->accessRenderTargetContext()->origin();
    // TODO: Make caller specify this (change virtual signature of onNewSurface).
    static const SkBudgeted kBudgeted = SkBudgeted::kNo;
    return SkSurface::MakeRenderTarget(fDevice->context(), kBudgeted, info, sampleCount,
                                       origin, &this->props());
}

sk_sp<SkImage> SkSurface_Gpu::onNewImageSnapshot() {
    GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();
    if (!rtc) {
        return nullptr;
    }

    GrContext* ctx = fDevice->context();

    if (!rtc->asSurfaceProxy()) {
        return nullptr;
    }

    SkBudgeted budgeted = rtc->asSurfaceProxy()->isBudgeted();

    sk_sp<GrTextureProxy> srcProxy = rtc->asTextureProxyRef();
    // If the original render target is a buffer originally created by the client, then we don't
    // want to ever retarget the SkSurface at another buffer we create. Force a copy now to avoid
    // copy-on-write.
    if (!srcProxy || rtc->priv().refsWrappedObjects()) {
        SkASSERT(rtc->origin() == rtc->asSurfaceProxy()->origin());

        srcProxy = GrSurfaceProxy::Copy(ctx, rtc->asSurfaceProxy(), budgeted);
    }

    const SkImageInfo info = fDevice->imageInfo();
    sk_sp<SkImage> image;
    if (srcProxy) {
        // The renderTargetContext coming out of SkGpuDevice should always be exact and the
        // above copy creates a kExact surfaceContext.
        SkASSERT(srcProxy->priv().isExact());
        image = sk_make_sp<SkImage_Gpu>(ctx, kNeedNewImageUniqueID,
                                        info.alphaType(), std::move(srcProxy),
                                        info.refColorSpace(), budgeted);
    }
    return image;
}

// Create a new render target and, if necessary, copy the contents of the old
// render target into it. Note that this flushes the SkGpuDevice but
// doesn't force an OpenGL flush.
void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
    GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();

    // are we sharing our backing proxy with the image? Note this call should never create a new
    // image because onCopyOnWrite is only called when there is a cached image.
    sk_sp<SkImage> image(this->refCachedImage());
    SkASSERT(image);

    GrSurfaceProxy* imageProxy = ((SkImage_Base*) image.get())->peekProxy();
    SkASSERT(imageProxy);

    if (rtc->asSurfaceProxy()->underlyingUniqueID() == imageProxy->underlyingUniqueID()) {
        fDevice->replaceRenderTargetContext(SkSurface::kRetain_ContentChangeMode == mode);
    } else if (kDiscard_ContentChangeMode == mode) {
        this->SkSurface_Gpu::onDiscard();
    }
}

void SkSurface_Gpu::onDiscard() {
    fDevice->accessRenderTargetContext()->discard();
}

bool SkSurface_Gpu::onFlush(int numSemaphores, GrBackendSemaphore* signalSemaphores) {
    return fDevice->flushAndSignalSemaphores(numSemaphores, signalSemaphores);
}

bool SkSurface_Gpu::onWait(int numSemaphores, const GrBackendSemaphore* waitSemaphores) {
    return fDevice->wait(numSemaphores, waitSemaphores);
}

///////////////////////////////////////////////////////////////////////////////

bool SkSurface_Gpu::Valid(const SkImageInfo& info) {
    switch (info.colorType()) {
        case kRGBA_F16_SkColorType:
            return info.colorSpace() && info.colorSpace()->gammaIsLinear();
        case kRGBA_8888_SkColorType:
        case kBGRA_8888_SkColorType:
            return !info.colorSpace() || info.colorSpace()->gammaCloseToSRGB();
        default:
            return !info.colorSpace();
    }
}

bool SkSurface_Gpu::Valid(GrContext* context, GrPixelConfig config, SkColorSpace* colorSpace) {
    switch (config) {
        case kRGBA_half_GrPixelConfig:
            return colorSpace && colorSpace->gammaIsLinear();
        case kSRGBA_8888_GrPixelConfig:
        case kSBGRA_8888_GrPixelConfig:
            return context->caps()->srgbSupport() && colorSpace && colorSpace->gammaCloseToSRGB();
        case kRGBA_8888_GrPixelConfig:
        case kBGRA_8888_GrPixelConfig:
            // If we don't have sRGB support, we may get here with a color space. It still needs
            // to be sRGB-like (so that the application will work correctly on sRGB devices.)
            return !colorSpace ||
                (colorSpace->gammaCloseToSRGB() && !context->caps()->srgbSupport());
        default:
            return !colorSpace;
    }
}

sk_sp<SkSurface> SkSurface::MakeRenderTarget(GrContext* ctx, SkBudgeted budgeted,
                                             const SkImageInfo& info, int sampleCount,
                                             GrSurfaceOrigin origin, const SkSurfaceProps* props) {
    if (!SkSurface_Gpu::Valid(info)) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(
            ctx, budgeted, info, sampleCount, origin, props, SkGpuDevice::kClear_InitContents));
    if (!device) {
        return nullptr;
    }
    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

sk_sp<SkSurface> SkSurface::MakeFromBackendTexture(GrContext* context, const GrBackendTexture& tex,
                                                   GrSurfaceOrigin origin, int sampleCnt,
                                                   sk_sp<SkColorSpace> colorSpace,
                                                   const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }
    if (!SkSurface_Gpu::Valid(context, tex.config(), colorSpace.get())) {
        return nullptr;
    }

    sk_sp<GrRenderTargetContext> rtc(context->contextPriv().makeBackendTextureRenderTargetContext(
                                                                    tex,
                                                                    origin,
                                                                    sampleCnt,
                                                                    std::move(colorSpace),
                                                                    props));
    if (!rtc) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(context, std::move(rtc), tex.width(), tex.height(),
                                                SkGpuDevice::kUninit_InitContents));
    if (!device) {
        return nullptr;
    }
    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

sk_sp<SkSurface> SkSurface::MakeFromBackendRenderTarget(GrContext* context,
                                                        const GrBackendRenderTargetDesc& desc,
                                                        sk_sp<SkColorSpace> colorSpace,
                                                        const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }

    GrBackendRenderTarget backendRT(desc, context->contextPriv().getBackend());
    return MakeFromBackendRenderTarget(context, backendRT, desc.fOrigin,
                                       std::move(colorSpace), props);

}

sk_sp<SkSurface> SkSurface::MakeFromBackendRenderTarget(GrContext* context,
                                                        const GrBackendRenderTarget& backendRT,
                                                        GrSurfaceOrigin origin,
                                                        sk_sp<SkColorSpace> colorSpace,
                                                        const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }
    if (!SkSurface_Gpu::Valid(context, backendRT.config(), colorSpace.get())) {
        return nullptr;
    }

    sk_sp<GrRenderTargetContext> rtc(
        context->contextPriv().makeBackendRenderTargetRenderTargetContext(backendRT,
                                                                          origin,
                                                                          std::move(colorSpace),
                                                                          props));
    if (!rtc) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(context, std::move(rtc),
                                                backendRT.width(), backendRT.height(),
                                                SkGpuDevice::kUninit_InitContents));
    if (!device) {
        return nullptr;
    }

    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

sk_sp<SkSurface> SkSurface::MakeFromBackendTextureAsRenderTarget(GrContext* context,
                                                                 const GrBackendTexture& tex,
                                                                 GrSurfaceOrigin origin,
                                                                 int sampleCnt,
                                                                 sk_sp<SkColorSpace> colorSpace,
                                                                 const SkSurfaceProps* props) {
    if (!context) {
        return nullptr;
    }
    if (!SkSurface_Gpu::Valid(context, tex.config(), colorSpace.get())) {
        return nullptr;
    }

    sk_sp<GrRenderTargetContext> rtc(
        context->contextPriv().makeBackendTextureAsRenderTargetRenderTargetContext(
                                                                              tex,
                                                                              origin,
                                                                              sampleCnt,
                                                                              std::move(colorSpace),
                                                                              props));
    if (!rtc) {
        return nullptr;
    }

    sk_sp<SkGpuDevice> device(SkGpuDevice::Make(context, std::move(rtc), tex.width(), tex.height(),
                                                SkGpuDevice::kUninit_InitContents));
    if (!device) {
        return nullptr;
    }
    return sk_make_sp<SkSurface_Gpu>(std::move(device));
}

#endif