Ejemplo n.º 1
0
GrTexture* GrYUVProvider::refAsTexture(GrContext* ctx, const GrSurfaceDesc& desc, bool useCache) {
    SkYUVPlanesCache::Info yuvInfo;
    void* planes[3];
    YUVScoper scoper;
    if (!scoper.init(this, &yuvInfo, planes, useCache)) {
        return nullptr;
    }

    GrSurfaceDesc yuvDesc;
    yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
    SkAutoTUnref<GrTexture> yuvTextures[3];
    for (int i = 0; i < 3; ++i) {
        yuvDesc.fWidth  = yuvInfo.fSize[i].fWidth;
        yuvDesc.fHeight = yuvInfo.fSize[i].fHeight;
        // TODO: why do we need this check?
        bool needsExactTexture = (yuvDesc.fWidth  != yuvInfo.fSize[0].fWidth) ||
                                 (yuvDesc.fHeight != yuvInfo.fSize[0].fHeight);
        if (needsExactTexture) {
            yuvTextures[i].reset(ctx->textureProvider()->createTexture(yuvDesc, true));
        } else {
            yuvTextures[i].reset(ctx->textureProvider()->createApproxTexture(yuvDesc));
        }
        if (!yuvTextures[i] ||
            !yuvTextures[i]->writePixels(0, 0, yuvDesc.fWidth, yuvDesc.fHeight,
                                         yuvDesc.fConfig, planes[i], yuvInfo.fRowBytes[i])) {
                return nullptr;
            }
    }

    GrSurfaceDesc rtDesc = desc;
    rtDesc.fFlags = rtDesc.fFlags | kRenderTarget_GrSurfaceFlag;

    SkAutoTUnref<GrTexture> result(ctx->textureProvider()->createTexture(rtDesc, true, nullptr, 0));
    if (!result) {
        return nullptr;
    }

    GrRenderTarget* renderTarget = result->asRenderTarget();
    SkASSERT(renderTarget);

    GrPaint paint;
    SkAutoTUnref<GrFragmentProcessor> yuvToRgbProcessor(
                                        GrYUVtoRGBEffect::Create(yuvTextures[0],
                                                                 yuvTextures[1],
                                                                 yuvTextures[2],
                                                                 yuvInfo.fSize,
                                                                 yuvInfo.fColorSpace));
    paint.addColorFragmentProcessor(yuvToRgbProcessor);
    const SkRect r = SkRect::MakeIWH(yuvInfo.fSize[0].fWidth, yuvInfo.fSize[0].fHeight);

    SkAutoTUnref<GrDrawContext> drawContext(ctx->drawContext());
    if (!drawContext) {
        return nullptr;
    }

    drawContext->drawRect(renderTarget, GrClip::WideOpen(), paint, SkMatrix::I(), r);

    return result.detach();
}
Ejemplo n.º 2
0
sk_sp<GrTexture> GrYUVProvider::refAsTexture(GrContext* ctx,
        const GrSurfaceDesc& desc,
        bool useCache) {
    SkYUVPlanesCache::Info yuvInfo;
    void* planes[3];
    YUVScoper scoper;
    if (!scoper.init(this, &yuvInfo, planes, useCache)) {
        return nullptr;
    }

    GrSurfaceDesc yuvDesc;
    yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
    SkAutoTUnref<GrTexture> yuvTextures[3];
    for (int i = 0; i < 3; i++) {
        yuvDesc.fWidth  = yuvInfo.fSizeInfo.fSizes[i].fWidth;
        yuvDesc.fHeight = yuvInfo.fSizeInfo.fSizes[i].fHeight;
        // TODO: why do we need this check?
        bool needsExactTexture =
            (yuvDesc.fWidth  != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth) ||
            (yuvDesc.fHeight != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
        if (needsExactTexture) {
            yuvTextures[i].reset(ctx->textureProvider()->createTexture(yuvDesc, SkBudgeted::kYes));
        } else {
            yuvTextures[i].reset(ctx->textureProvider()->createApproxTexture(yuvDesc));
        }
        if (!yuvTextures[i] ||
                !yuvTextures[i]->writePixels(0, 0, yuvDesc.fWidth, yuvDesc.fHeight, yuvDesc.fConfig,
                                             planes[i], yuvInfo.fSizeInfo.fWidthBytes[i])) {
            return nullptr;
        }
    }

    sk_sp<GrDrawContext> drawContext(ctx->newDrawContext(SkBackingFit::kExact,
                                     desc.fWidth, desc.fHeight,
                                     desc.fConfig, desc.fSampleCnt));
    if (!drawContext) {
        return nullptr;
    }

    GrPaint paint;
    sk_sp<GrFragmentProcessor> yuvToRgbProcessor(
        GrYUVEffect::MakeYUVToRGB(yuvTextures[0], yuvTextures[1], yuvTextures[2],
                                  yuvInfo.fSizeInfo.fSizes, yuvInfo.fColorSpace, false));
    paint.addColorFragmentProcessor(std::move(yuvToRgbProcessor));

    // If we're decoding an sRGB image, the result of our linear math on the YUV planes is already
    // in sRGB. (The encoding is just math on bytes, with no concept of color spaces.) So, we need
    // to output the results of that math directly to the buffer that we will then consider sRGB.
    // If we have sRGB write control, we can just tell the HW not to do the Linear -> sRGB step.
    // Otherwise, we do our shader math to go from YUV -> sRGB, manually convert sRGB -> Linear,
    // then let the HW convert Linear -> sRGB.
    if (GrPixelConfigIsSRGB(desc.fConfig)) {
        if (ctx->caps()->srgbWriteControl()) {
            paint.setDisableOutputConversionToSRGB(true);
        } else {
            paint.addColorFragmentProcessor(GrGammaEffect::Make(2.2f));
        }
    }

    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
    const SkRect r = SkRect::MakeIWH(yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth,
                                     yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);

    drawContext->drawRect(GrNoClip(), paint, SkMatrix::I(), r);

    return drawContext->asTexture();
}
Ejemplo n.º 3
0
GrTexture* GrYUVProvider::refAsTexture(GrContext* ctx, const GrSurfaceDesc& desc, bool useCache) {
    SkYUVPlanesCache::Info yuvInfo;
    void* planes[3];
    YUVScoper scoper;
    if (!scoper.init(this, &yuvInfo, planes, useCache)) {
        return nullptr;
    }

    GrSurfaceDesc yuvDesc;
    yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
    SkAutoTUnref<GrTexture> yuvTextures[3];
    for (int i = 0; i < 3; i++) {
        yuvDesc.fWidth  = yuvInfo.fSizeInfo.fSizes[i].fWidth;
        yuvDesc.fHeight = yuvInfo.fSizeInfo.fSizes[i].fHeight;
        // TODO: why do we need this check?
        bool needsExactTexture =
                (yuvDesc.fWidth  != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth) ||
                (yuvDesc.fHeight != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
        if (needsExactTexture) {
            yuvTextures[i].reset(ctx->textureProvider()->createTexture(yuvDesc, SkBudgeted::kYes));
        } else {
            yuvTextures[i].reset(ctx->textureProvider()->createApproxTexture(yuvDesc));
        }
        if (!yuvTextures[i] ||
            !yuvTextures[i]->writePixels(0, 0, yuvDesc.fWidth, yuvDesc.fHeight, yuvDesc.fConfig,
                                         planes[i], yuvInfo.fSizeInfo.fWidthBytes[i])) {
                return nullptr;
            }
    }

    GrSurfaceDesc rtDesc = desc;
    rtDesc.fFlags = rtDesc.fFlags | kRenderTarget_GrSurfaceFlag;

    SkAutoTUnref<GrTexture> result(ctx->textureProvider()->createTexture(rtDesc, SkBudgeted::kYes,
                                                                         nullptr, 0));
    if (!result) {
        return nullptr;
    }

    GrRenderTarget* renderTarget = result->asRenderTarget();
    SkASSERT(renderTarget);

    GrPaint paint;
    // We may be decoding an sRGB image, but the result of our linear math on the YUV planes
    // is already in sRGB in that case. Don't convert (which will make the image too bright).
    paint.setDisableOutputConversionToSRGB(true);
    SkAutoTUnref<const GrFragmentProcessor> yuvToRgbProcessor(
                                        GrYUVEffect::CreateYUVToRGB(yuvTextures[0],
                                                                    yuvTextures[1],
                                                                    yuvTextures[2],
                                                                    yuvInfo.fSizeInfo.fSizes,
                                                                    yuvInfo.fColorSpace));
    paint.addColorFragmentProcessor(yuvToRgbProcessor);
    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
    const SkRect r = SkRect::MakeIWH(yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth,
            yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);

    SkAutoTUnref<GrDrawContext> drawContext(ctx->drawContext(renderTarget));
    if (!drawContext) {
        return nullptr;
    }

    drawContext->drawRect(GrClip::WideOpen(), paint, SkMatrix::I(), r);

    return result.release();
}