cc/CCTexture.cpp


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

// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "config.h"

#include "CCTexture.h"

namespace WebCore {

void CCTexture::setDimensions(const IntSize& size, GC3Denum format)
{
    m_size = size;
    m_format = format;
}

size_t CCTexture::bytes() const
{
    if (m_size.isEmpty())
        return 0u;

    return memorySizeBytes(m_size, m_format);
}

size_t CCTexture::memorySizeBytes(const IntSize& size, GC3Denum format)
{
    unsigned int componentsPerPixel;
    unsigned int bytesPerComponent;
    if (!GraphicsContext3D::computeFormatAndTypeParameters(format, GraphicsContext3D::UNSIGNED_BYTE, &componentsPerPixel, &bytesPerComponent)) {
        ASSERT_NOT_REACHED();
        return 0u;
    }
    return componentsPerPixel * bytesPerComponent * size.width() * size.height();
}

}