The Tor Browser: gfx/gl/GfxTexturesReporter.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* vim: set ts=8 sts=4 et sw=4 tw=80: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #include "GfxTexturesReporter.h"

     8 #include "GLDefs.h"

    10 using namespace mozilla;

    11 using namespace mozilla::gl;

    13 NS_IMPL_ISUPPORTS(GfxTexturesReporter, nsIMemoryReporter)

    15 int64_t GfxTexturesReporter::sAmount = 0;

    17 static uint32_t

    18 GetBitsPerTexel(GLenum format, GLenum type)

    19 {

    20     // If there is no defined format or type, we're not taking up any memory

    21     if (!format || !type) {

    22         return 0;

    23     }

    25     if (format == LOCAL_GL_DEPTH_COMPONENT) {

    26         if (type == LOCAL_GL_UNSIGNED_SHORT)

    27             return 2*8;

    28         else if (type == LOCAL_GL_UNSIGNED_INT)

    29             return 4*8;

    30     } else if (format == LOCAL_GL_DEPTH_STENCIL) {

    31         if (type == LOCAL_GL_UNSIGNED_INT_24_8_EXT)

    32             return 4*8;

    33     }

    35     if (type == LOCAL_GL_UNSIGNED_BYTE || type == LOCAL_GL_FLOAT) {

    36         uint32_t multiplier = type == LOCAL_GL_FLOAT ? 32 : 8;

    37         switch (format) {

    38             case LOCAL_GL_ALPHA:

    39             case LOCAL_GL_LUMINANCE:

    40                 return 1 * multiplier;

    41             case LOCAL_GL_LUMINANCE_ALPHA:

    42                 return 2 * multiplier;

    43             case LOCAL_GL_RGB:

    44                 return 3 * multiplier;

    45             case LOCAL_GL_RGBA:

    46                 return 4 * multiplier;

    47             case LOCAL_GL_COMPRESSED_RGB_PVRTC_2BPPV1:

    48             case LOCAL_GL_COMPRESSED_RGBA_PVRTC_2BPPV1:

    49                 return 2;

    50             case LOCAL_GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

    51             case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

    52             case LOCAL_GL_ATC_RGB:

    53             case LOCAL_GL_COMPRESSED_RGB_PVRTC_4BPPV1:

    54             case LOCAL_GL_COMPRESSED_RGBA_PVRTC_4BPPV1:

    55             case LOCAL_GL_ETC1_RGB8_OES:

    56                 return 4;

    57             case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

    58             case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

    59             case LOCAL_GL_ATC_RGBA_EXPLICIT_ALPHA:

    60             case LOCAL_GL_ATC_RGBA_INTERPOLATED_ALPHA:

    61                 return 8;

    62             default:

    63                 break;

    64         }

    65     } else if (type == LOCAL_GL_UNSIGNED_SHORT_4_4_4_4 ||

    66                type == LOCAL_GL_UNSIGNED_SHORT_5_5_5_1 ||

    67                type == LOCAL_GL_UNSIGNED_SHORT_5_6_5)

    68     {

    69         return 2*8;

    70     }

    72     MOZ_ASSERT(false);

    73     return 0;

    74 }

    76 /* static */ void

    77 GfxTexturesReporter::UpdateAmount(MemoryUse action, GLenum format,

    78                                   GLenum type, int32_t tileWidth,

    79                                   int32_t tileHeight)

    80 {

    81     int64_t bitsPerTexel = GetBitsPerTexel(format, type);

    82     int64_t bytes = int64_t(tileWidth) * int64_t(tileHeight) * bitsPerTexel/8;

    83     if (action == MemoryFreed) {

    84         sAmount -= bytes;

    85     } else {

    86         sAmount += bytes;

    87     }

    88 }

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