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// Copyright 2015 The Chromium Authors
// 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 std::array<WebGLCompressedTextureASTC::BlockSizeCompressASTC, 14>
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) {
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_KHR_texture_compression_astc_ldr");
supports_hdr = context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_KHR_texture_compression_astc_hdr");
const int kAlphaFormatGap =
GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR - GL_COMPRESSED_RGBA_ASTC_4x4_KHR;
for (const auto& astc : WebGLCompressedTextureASTC::kBlockSizeCompressASTC) {
/* GL_COMPRESSED_RGBA_ASTC(0x93B0 ~ 0x93BD) */
context->AddCompressedTextureFormat(astc.compress_type);
/* GL_COMPRESSED_SRGB8_ALPHA8_ASTC(0x93D0 ~ 0x93DD) */
context->AddCompressedTextureFormat(astc.compress_type + kAlphaFormatGap);
}
}
WebGLExtensionName WebGLCompressedTextureASTC::GetName() const {
return kWebGLCompressedTextureASTCName;
}
bool WebGLCompressedTextureASTC::Supported(WebGLRenderingContextBase* context) {
Extensions3DUtil* extensions_util = context->ExtensionsUtil();
return extensions_util->SupportsExtension(
"GL_KHR_texture_compression_astc_ldr");
}
const char* WebGLCompressedTextureASTC::ExtensionName() {
return "WEBGL_compressed_texture_astc";
}
Vector<String> WebGLCompressedTextureASTC::getSupportedProfiles() {
Vector<String> result = {"ldr"};
if (supports_hdr) {
result.emplace_back("hdr");
}
return result;
}
} // namespace blink
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