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1 //
2 // Copyright 2016 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 
7 // FrontendFeatures.h: Features/workarounds for driver bugs and other behaviors seen
8 // on all platforms.
9 
10 #ifndef ANGLE_PLATFORM_FRONTENDFEATURES_H_
11 #define ANGLE_PLATFORM_FRONTENDFEATURES_H_
12 
13 #include "platform/Feature.h"
14 
15 namespace angle
16 {
17 
18 struct FrontendFeatures : angle::FeatureSetBase
19 {
20     FrontendFeatures();
21     ~FrontendFeatures();
22 
23     // Force the context to be lost (via KHR_robustness) if a GL_OUT_OF_MEMORY error occurs. The
24     // driver may be in an inconsistent state if this happens, and some users of ANGLE rely on this
25     // notification to prevent further execution.
26     angle::Feature loseContextOnOutOfMemory = {
27         "lose_context_on_out_of_memory", angle::FeatureCategory::FrontendWorkarounds,
28         "Some users rely on a lost context notification if a GL_OUT_OF_MEMORY "
29         "error occurs",
30         &members};
31 
32     // Program binaries don't contain transform feedback varyings on Qualcomm GPUs.
33     // Work around this by disabling the program cache for programs with transform feedback.
34     angle::Feature disableProgramCachingForTransformFeedback = {
35         "disable_program_caching_for_transform_feedback",
36         angle::FeatureCategory::FrontendWorkarounds,
37         "On some GPUs, program binaries don't contain transform feedback varyings", &members};
38 
39     // On Windows Intel OpenGL drivers TexImage sometimes seems to interact with the Framebuffer.
40     // Flaky crashes can occur unless we sync the Framebuffer bindings. The workaround is to add
41     // Framebuffer binding dirty bits to TexImage updates. See http://anglebug.com/2906
42     angle::Feature syncFramebufferBindingsOnTexImage = {
43         "sync_framebuffer_bindings_on_tex_image", angle::FeatureCategory::FrontendWorkarounds,
44         "On some drivers TexImage sometimes seems to interact "
45         "with the Framebuffer",
46         &members};
47 
48     angle::Feature scalarizeVecAndMatConstructorArgs = {
49         "scalarize_vec_and_mat_constructor_args", angle::FeatureCategory::FrontendWorkarounds,
50         "Always rewrite vec/mat constructors to be consistent", &members,
51         "http://crbug.com/398694"};
52 };
53 
54 inline FrontendFeatures::FrontendFeatures()  = default;
55 inline FrontendFeatures::~FrontendFeatures() = default;
56 
57 }  // namespace angle
58 
59 #endif  // ANGLE_PLATFORM_FRONTENDFEATURES_H_
60