blob: 530e82e65a28f6cf7ac0b538848f6fde8cfd3fd1 [file] [log] [blame]
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Extensions.h"
#include "Debug.h"
#include "Properties.h"
#include "utils/StringUtils.h"
#include <cutils/compiler.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <utils/Log.h>
namespace android {
namespace uirenderer {
Extensions::Extensions() {
if (Properties::isSkiaEnabled()) {
return;
}
const char* version = (const char*)glGetString(GL_VERSION);
// Section 6.1.5 of the OpenGL ES specification indicates the GL version
// string strictly follows this format:
//
// OpenGL<space>ES<space><version number><space><vendor-specific information>
//
// In addition section 6.1.5 describes the version number thusly:
//
// "The version number is either of the form major number.minor number or
// major number.minor number.release number, where the numbers all have one
// or more digits. The release number and vendor specific information are
// optional."
if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) {
// If we cannot parse the version number, assume OpenGL ES 2.0
mVersionMajor = 2;
mVersionMinor = 0;
}
auto extensions = StringUtils::split((const char*)glGetString(GL_EXTENSIONS));
mHasNPot = extensions.has("GL_OES_texture_npot");
mHasFramebufferFetch = extensions.has("GL_NV_shader_framebuffer_fetch");
mHasDiscardFramebuffer = extensions.has("GL_EXT_discard_framebuffer");
mHasDebugMarker = extensions.has("GL_EXT_debug_marker");
mHas1BitStencil = extensions.has("GL_OES_stencil1");
mHas4BitStencil = extensions.has("GL_OES_stencil4");
mHasUnpackSubImage = extensions.has("GL_EXT_unpack_subimage");
mHasRenderableFloatTexture = extensions.has("GL_OES_texture_half_float");
mHasSRGB = mVersionMajor >= 3 || extensions.has("GL_EXT_sRGB");
mHasSRGBWriteControl = extensions.has("GL_EXT_sRGB_write_control");
#ifdef ANDROID_ENABLE_LINEAR_BLENDING
// If linear blending is enabled, the device must have (ES3.0 or EXT_sRGB)
// and EXT_sRGB_write_control
LOG_ALWAYS_FATAL_IF(!mHasSRGB, "Linear blending requires ES 3.0 or EXT_sRGB");
LOG_ALWAYS_FATAL_IF(!mHasSRGBWriteControl, "Linear blending requires EXT_sRGB_write_control");
mHasLinearBlending = true;
#else
mHasLinearBlending = false;
#endif
}
}; // namespace uirenderer
}; // namespace android