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// 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 "modules/webgl/WebGLCompressedTextureASTC.h"
#include "modules/webgl/WebGLRenderingContextBase.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 < WTF_ARRAY_LENGTH(WebGLCompressedTextureASTC::kBlockSizeCompressASTC);
i++) {
/* GL_COMPRESSED_RGBA_ASTC(0x93B0 ~ 0x93BD) */
context->addCompressedTextureFormat(
WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].CompressType);
/* GL_COMPRESSED_SRGB8_ALPHA8_ASTC(0x93D0 ~ 0x93DD) */
context->addCompressedTextureFormat(
WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].CompressType +
kAlphaFormatGap);
}
}
WebGLExtensionName WebGLCompressedTextureASTC::name() const {
return WebGLCompressedTextureASTCName;
}
WebGLCompressedTextureASTC* WebGLCompressedTextureASTC::create(
WebGLRenderingContextBase* context) {
return new WebGLCompressedTextureASTC(context);
}
bool WebGLCompressedTextureASTC::supported(WebGLRenderingContextBase* context) {
Extensions3DUtil* extensionsUtil = context->extensionsUtil();
return extensionsUtil->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
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