extensions/EGL_ANGLE_experimental_present_path.txt


Log

Author Commit Date CI Message
Austin Kinross 2a63b3f8 2016-02-08T12:29:08 Re-land "Implement EGL_experimental_present_path_angle" - Re-land with clang fix. This allows ANGLE to render directly onto a D3D swapchain in the correct orientation when using the D3D11 renderer. The trick is to add an extra uniform to each shader which takes either the value +1.0 or -1.0. When rendering to a texture, ANGLE sets this value to -1.0. When rendering to the default framebuffer, ANGLE sets this value to +1.0. ANGLE multiplies vertex positions by this value in the VS to invert rendering when appropriate. It also corrects other state (e.g. viewport/scissor rect) and shader built-in values (e.g. gl_FragCoord). This saves a substantial amount of GPU time and lowers power consumption. For example, the old method (where ANGLE renders all content onto an offscreen texture, and then copies/inverts this onto the swapchain at eglSwapBuffers() time) uses about 20% of the GPU each frame on a Lumia 630. Verification: + dEQP GL ES2 tests pass when "present path fast" is enabled + all ANGLE_end2end_tests pass when "present path fast" is enabled BUG=angleproject:1219 Change-Id: I56b339897828753a616d7bae837a2f354dba9c63 Reviewed-on: https://chromium-review.googlesource.com/326730 Tryjob-Request: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>
Jamie Madill d1c46228 2016-02-08T14:51:18 Revert "Implement EGL_experimental_present_path_angle" Compile failure on Clang/Win: The reason for reverting is: FAILED: ninja -t msvc -e environment.x86 -- "..\..\third_party/llvm-build/Release+Asserts/bin/clang-cl" -m32 /nologo /showIncludes /FC @obj\third_party\angle\src\tests\egl_tests\angle_end2end_tests.EGLPresentPathD3D11Test.obj.rsp /c ..\..\third_party\angle\src\tests\egl_tests\EGLPresentPathD3D11Test.cpp /Foobj\third_party\angle\src\tests\egl_tests\angle_end2end_tests.EGLPresentPathD3D11Test.obj /Fdobj\gpu\angle_end2end_tests.cc.pdb In file included from ..\..\third_party\angle\src\tests\egl_tests\EGLPresentPathD3D11Test.cpp:7: In file included from ..\..\third_party\angle\src\tests\test_utils/ANGLETest.h:13: ..\..\testing\gtest\include\gtest/gtest.h(1392,16) : error: comparison of integers of different signs: 'const int' and 'const unsigned int' [-Werror,-Wsign-compare] if (expected == actual) { ~~~~~~~~ ^ ~~~~~~ ..\..\testing\gtest\include\gtest/gtest.h(1422,12) : note: in instantiation of function template specialization 'testing::internal::CmpHelperEQ<int, unsigned int>' requested here return CmpHelperEQ(expected_expression, actual_expression, expected, ^ ..\..\third_party\angle\src\tests\egl_tests\EGLPresentPathD3D11Test.cpp(281,9) : note: in instantiation of function template specialization 'testing::internal::EqHelper<false>::Compare<int, unsigned int>' requested here ASSERT_EQ(mWindowWidth * 4, mappedSubresource.RowPitch); ^ ..\..\testing\gtest\include\gtest/gtest.h(1960,32) : note: expanded from macro 'ASSERT_EQ' # define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2) ^ ..\..\testing\gtest\include\gtest/gtest.h(1943,67) : note: expanded from macro 'GTEST_ASSERT_EQ' EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \ ^ BUG=angleproject:1219 This reverts commit 6b3c1db5170450bbc4946d8f18ba0d8619da43a0. Change-Id: Ia67ab82dd13295dc03235d57fa417c73f20a49e6 Reviewed-on: https://chromium-review.googlesource.com/326680 Reviewed-by: Jamie Madill <jmadill@chromium.org>
Austin Kinross 6b3c1db5 2015-12-18T14:01:46 Implement EGL_experimental_present_path_angle This allows ANGLE to render directly onto a D3D swapchain in the correct orientation when using the D3D11 renderer. The trick is to add an extra uniform to each shader which takes either the value +1.0 or -1.0. When rendering to a texture, ANGLE sets this value to -1.0. When rendering to the default framebuffer, ANGLE sets this value to +1.0. ANGLE multiplies vertex positions by this value in the VS to invert rendering when appropriate. It also corrects other state (e.g. viewport/scissor rect) and shader built-in values (e.g. gl_FragCoord). This saves a substantial amount of GPU time and lowers power consumption. For example, the old method (where ANGLE renders all content onto an offscreen texture, and then copies/inverts this onto the swapchain at eglSwapBuffers() time) uses about 20% of the GPU each frame on a Lumia 630. Verification: + dEQP GL ES2 tests pass when "present path fast" is enabled + all ANGLE_end2end_tests pass when "present path fast" is enabled BUG=angleproject:1219 Change-Id: Ib6eeea46bafa6ebce4adada0ae9db3a433b8fc4c Reviewed-on: https://chromium-review.googlesource.com/321360 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tryjob-Request: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>