src/gpu/GrSurface.cpp

/*
 * 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 "src/core/SkCompressedDataUtils.h"
#include "src/gpu/GrBackendUtils.h"
#include "src/gpu/GrRenderTarget.h"
#include "src/gpu/GrResourceProvider.h"
#include "src/gpu/GrSurface.h"
#include "src/gpu/GrTexture.h"

#include "src/core/SkMathPriv.h"
#include "src/gpu/SkGr.h"

size_t GrSurface::ComputeSize(const GrBackendFormat& format,
                              SkISize dimensions,
                              int colorSamplesPerPixel,
                              GrMipmapped mipMapped,
                              bool binSize) {
    // For external formats we do not actually know the real size of the resource so we just return
    // 0 here to indicate this.
    if (format.textureType() == GrTextureType::kExternal) {
        return 0;
    }

    size_t colorSize;

    if (binSize) {
        dimensions = GrResourceProvider::MakeApprox(dimensions);
    }

    SkImage::CompressionType compressionType = GrBackendFormatToCompressionType(format);
    if (compressionType != SkImage::CompressionType::kNone) {
        colorSize = SkCompressedFormatDataSize(compressionType, dimensions,
                                               mipMapped == GrMipmapped::kYes);
    } else {
        colorSize = (size_t)dimensions.width() * dimensions.height() *
                    GrBackendFormatBytesPerPixel(format);
    }
    SkASSERT(colorSize > 0);

    size_t finalSize = colorSamplesPerPixel * colorSize;

    if (GrMipmapped::kYes == mipMapped) {
        // We don't have to worry about the mipmaps being a different dimensions than
        // we'd expect because we never change fDesc.fWidth/fHeight.
        finalSize += colorSize/3;
    }
    return finalSize;
}

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

void GrSurface::onRelease() {
    this->invokeReleaseProc();
    this->INHERITED::onRelease();
}

void GrSurface::onAbandon() {
    this->invokeReleaseProc();
    this->INHERITED::onAbandon();
}