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
|
// Copyright 2015 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 "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_astc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
namespace blink {
const WebGLCompressedTextureASTC::BlockSizeCompressASTC
WebGLCompressedTextureASTC::kBlockSizeCompressASTC[] = {
{GL_COMPRESSED_RGBA_ASTC_4x4_KHR, 4, 4},
{GL_COMPRESSED_RGBA_ASTC_5x4_KHR, 5, 4},
{GL_COMPRESSED_RGBA_ASTC_5x5_KHR, 5, 5},
{GL_COMPRESSED_RGBA_ASTC_6x5_KHR, 6, 5},
{GL_COMPRESSED_RGBA_ASTC_6x6_KHR, 6, 6},
{GL_COMPRESSED_RGBA_ASTC_8x5_KHR, 8, 5},
{GL_COMPRESSED_RGBA_ASTC_8x6_KHR, 8, 6},
{GL_COMPRESSED_RGBA_ASTC_8x8_KHR, 8, 8},
{GL_COMPRESSED_RGBA_ASTC_10x5_KHR, 10, 5},
{GL_COMPRESSED_RGBA_ASTC_10x6_KHR, 10, 6},
{GL_COMPRESSED_RGBA_ASTC_10x8_KHR, 10, 8},
{GL_COMPRESSED_RGBA_ASTC_10x10_KHR, 10, 10},
{GL_COMPRESSED_RGBA_ASTC_12x10_KHR, 12, 10},
{GL_COMPRESSED_RGBA_ASTC_12x12_KHR, 12, 12}};
WebGLCompressedTextureASTC::WebGLCompressedTextureASTC(
WebGLRenderingContextBase* context)
: WebGLExtension(context) {
const int kAlphaFormatGap =
GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR - GL_COMPRESSED_RGBA_ASTC_4x4_KHR;
for (size_t i = 0;
i < arraysize(WebGLCompressedTextureASTC::kBlockSizeCompressASTC); i++) {
/* GL_COMPRESSED_RGBA_ASTC(0x93B0 ~ 0x93BD) */
context->AddCompressedTextureFormat(
WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].compress_type);
/* GL_COMPRESSED_SRGB8_ALPHA8_ASTC(0x93D0 ~ 0x93DD) */
context->AddCompressedTextureFormat(
WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].compress_type +
kAlphaFormatGap);
}
}
WebGLExtensionName WebGLCompressedTextureASTC::GetName() const {
return kWebGLCompressedTextureASTCName;
}
WebGLCompressedTextureASTC* WebGLCompressedTextureASTC::Create(
WebGLRenderingContextBase* context) {
return MakeGarbageCollected<WebGLCompressedTextureASTC>(context);
}
bool WebGLCompressedTextureASTC::Supported(WebGLRenderingContextBase* context) {
Extensions3DUtil* extensions_util = context->ExtensionsUtil();
return extensions_util->SupportsExtension(
"GL_KHR_texture_compression_astc_ldr");
}
const char* WebGLCompressedTextureASTC::ExtensionName() {
// TODO(cyzero.kim): implement extension for
// GL_KHR_texture_compression_astc_hdr.
return "WEBGL_compressed_texture_astc";
}
} // namespace blink
|
