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https://github.com/encounter/dawn-cmake.git
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9d9d76c590
This patch implements the creation, buffer-to-texture copies and texture-to-texture copies with BC formats on OpenGL backend. Note that OpenGL SPEC also has the same issue about texture-to-texture copies with compressed textures as Vulkan SPEC, so we have to skip the related case. The texture-to-buffer copies with BC formats and related end2end tests will be supported in the following patches. BUG=dawn:42 TEST=dawn_end2end_tests Change-Id: I76b16862259cb2df77f202ed7ed433d41aa3cd47 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10220 Commit-Queue: Jiawei Shao <jiawei.shao@intel.com> Reviewed-by: Austin Eng <enga@chromium.org>
88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
// Copyright 2019 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/opengl/OpenGLFunctions.h"
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#include <cctype>
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#include <tuple>
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namespace dawn_native { namespace opengl {
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MaybeError OpenGLFunctions::Initialize(GetProcAddress getProc) {
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PFNGLGETSTRINGPROC getString = reinterpret_cast<PFNGLGETSTRINGPROC>(getProc("glGetString"));
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if (getString == nullptr) {
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return DAWN_CONTEXT_LOST_ERROR("Couldn't load glGetString");
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}
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std::string version = reinterpret_cast<const char*>(getString(GL_VERSION));
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if (version.find("OpenGL ES") != std::string::npos) {
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// ES spec states that the GL_VERSION string will be in the following format:
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// "OpenGL ES N.M vendor-specific information"
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mStandard = Standard::ES;
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mMajorVersion = version[10] - '0';
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mMinorVersion = version[12] - '0';
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// The minor version shouldn't get to two digits.
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ASSERT(version.size() <= 13 || !isdigit(version[13]));
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DAWN_TRY(LoadOpenGLESProcs(getProc, mMajorVersion, mMinorVersion));
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} else {
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// OpenGL spec states the GL_VERSION string will be in the following format:
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// <version number><space><vendor-specific information>
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// The version number is either of the form major number.minor number or major
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// number.minor number.release number, where the numbers all have one or more
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// digits
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mStandard = Standard::Desktop;
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mMajorVersion = version[0] - '0';
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mMinorVersion = version[2] - '0';
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// The minor version shouldn't get to two digits.
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ASSERT(version.size() <= 3 || !isdigit(version[3]));
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DAWN_TRY(LoadDesktopGLProcs(getProc, mMajorVersion, mMinorVersion));
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}
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InitializeSupportedGLExtensions();
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return {};
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}
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void OpenGLFunctions::InitializeSupportedGLExtensions() {
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int32_t numExtensions;
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GetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
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for (int32_t i = 0; i < numExtensions; ++i) {
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const char* extensionName = reinterpret_cast<const char*>(GetStringi(GL_EXTENSIONS, i));
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mSupportedGLExtensionsSet.insert(extensionName);
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}
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}
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bool OpenGLFunctions::IsGLExtensionSupported(const char* extension) const {
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ASSERT(extension != nullptr);
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return mSupportedGLExtensionsSet.count(extension) != 0;
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}
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bool OpenGLFunctions::IsAtLeastGL(uint32_t majorVersion, uint32_t minorVersion) {
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return mStandard == Standard::Desktop &&
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std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
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}
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bool OpenGLFunctions::IsAtLeastGLES(uint32_t majorVersion, uint32_t minorVersion) {
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return mStandard == Standard::ES &&
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std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
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}
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}} // namespace dawn_native::opengl
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