xref: /third_party/skia/src/gpu/gl/GrGLGLSL.cpp (revision cb93a386)
1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "src/gpu/gl/GrGLGLSL.h"
9#include "src/gpu/gl/GrGLUtil.h"
10
11bool GrGLGetGLSLGeneration(const GrGLDriverInfo& info, GrGLSLGeneration* generation) {
12    SkASSERT(generation);
13    // Workaround for a bug on some Adreno 308 devices with Android 9. The driver reports a GL
14    // version of 3.0, and a GLSL version of 3.1. If we use version 310 shaders, the driver reports
15    // that it's not supported. To keep things simple, we pin the GLSL version to the GL version.
16    // Note that GLSL versions have an extra digit on their minor level, so we have to scale up
17    // the GL version's minor revision to get a comparable GLSL version. This logic can easily
18    // create invalid GLSL versions (older GL didn't keep the versions in sync), but the checks
19    // below will further pin the GLSL generation correctly.
20    // https://github.com/flutter/flutter/issues/36130
21    uint32_t glMajor = GR_GL_MAJOR_VER(info.fVersion),
22             glMinor = GR_GL_MINOR_VER(info.fVersion);
23    GrGLSLVersion ver = std::min(info.fGLSLVersion, GR_GLSL_VER(glMajor, 10 * glMinor));
24    if (info.fGLSLVersion == GR_GLSL_INVALID_VER) {
25        return false;
26    }
27
28    if (GR_IS_GR_GL(info.fStandard)) {
29        SkASSERT(ver >= GR_GLSL_VER(1,10));
30        if (ver >= GR_GLSL_VER(4,20)) {
31            *generation = k420_GrGLSLGeneration;
32        } else if (ver >= GR_GLSL_VER(4,00)) {
33            *generation = k400_GrGLSLGeneration;
34        } else if (ver >= GR_GLSL_VER(3,30)) {
35            *generation = k330_GrGLSLGeneration;
36        } else if (ver >= GR_GLSL_VER(1,50)) {
37            *generation = k150_GrGLSLGeneration;
38        } else if (ver >= GR_GLSL_VER(1,40)) {
39            *generation = k140_GrGLSLGeneration;
40        } else if (ver >= GR_GLSL_VER(1,30)) {
41            *generation = k130_GrGLSLGeneration;
42        } else {
43            *generation = k110_GrGLSLGeneration;
44        }
45        return true;
46    } else if (GR_IS_GR_GL_ES(info.fStandard)) {
47        SkASSERT(ver >= GR_GL_VER(1,00));
48        if (ver >= GR_GLSL_VER(3,20)) {
49            *generation = k320es_GrGLSLGeneration;
50        } else if (ver >= GR_GLSL_VER(3,10)) {
51            *generation = k310es_GrGLSLGeneration;
52        } else if (ver >= GR_GLSL_VER(3,00)) {
53            *generation = k330_GrGLSLGeneration;
54        } else {
55            *generation = k110_GrGLSLGeneration;
56        }
57        return true;
58    } else if (GR_IS_GR_WEBGL(info.fStandard)) {
59        SkASSERT(ver >= GR_GL_VER(1,0));
60        if (ver >= GR_GLSL_VER(2,0)) {
61            *generation = k330_GrGLSLGeneration;  // ES 3.0
62        } else {
63            *generation = k110_GrGLSLGeneration;
64        }
65        return true;
66    }
67    SK_ABORT("Unknown GL Standard");
68}
69