bool GrGLGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation) {
SkASSERT(generation);
GrGLSLVersion ver = GrGLGetGLSLVersion(gl);
if (GR_GLSL_INVALID_VER == ver) {
return false;
}
if (GR_IS_GR_GL(gl->fStandard)) {
SkASSERT(ver >= GR_GLSL_VER(1,10));
if (ver >= GR_GLSL_VER(4,20)) {
*generation = k420_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(4,00)) {
*generation = k400_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(3,30)) {
*generation = k330_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(1,50)) {
*generation = k150_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(1,40)) {
*generation = k140_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(1,30)) {
*generation = k130_GrGLSLGeneration;
} else {
*generation = k110_GrGLSLGeneration;
}
return true;
} else if (GR_IS_GR_GL_ES(gl->fStandard) || GR_IS_GR_WEBGL(gl->fStandard)) {
SkASSERT(ver >= GR_GL_VER(1,00));
if (ver >= GR_GLSL_VER(3,20)) {
*generation = k320es_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(3,10)) {
*generation = k310es_GrGLSLGeneration;
} else if (ver >= GR_GLSL_VER(3,00)) {
*generation = k330_GrGLSLGeneration;
} else {
*generation = k110_GrGLSLGeneration;
}
return true;
}
SK_ABORT("Unknown GL Standard");
return false;
}
std::unique_ptr<GrGLContext> GrGLContext::Make(sk_sp<const GrGLInterface> interface,
const GrContextOptions& options) {
if (!interface->validate()) {
return nullptr;
}
const GrGLubyte* verUByte;
GR_GL_CALL_RET(interface.get(), verUByte, GetString(GR_GL_VERSION));
const char* ver = reinterpret_cast<const char*>(verUByte);
const GrGLubyte* rendererUByte;
GR_GL_CALL_RET(interface.get(), rendererUByte, GetString(GR_GL_RENDERER));
const char* renderer = reinterpret_cast<const char*>(rendererUByte);
ConstructorArgs args;
args.fGLVersion = GrGLGetVersionFromString(ver);
if (GR_GL_INVALID_VER == args.fGLVersion) {
return nullptr;
}
if (!GrGLGetGLSLGeneration(interface.get(), &args.fGLSLGeneration)) {
return nullptr;
}
args.fVendor = GrGLGetVendor(interface.get());
args.fRenderer = GrGLGetRendererFromStrings(renderer, interface->fExtensions);
GrGLGetANGLEInfoFromString(renderer, &args.fANGLEBackend, &args.fANGLEVendor,
&args.fANGLERenderer);
/*
* Qualcomm drivers for the 3xx series have a horrendous bug with some drivers. Though they
* claim to support GLES 3.00, some perfectly valid GLSL300 shaders will only compile with
* #version 100, and will fail to compile with #version 300 es. In the long term, we
* need to lock this down to a specific driver version.
* ?????/2015 - This bug is still present in Lollipop pre-mr1
* 06/18/2015 - This bug does not affect the nexus 6 (which has an Adreno 4xx).
*/
if (kAdreno3xx_GrGLRenderer == args.fRenderer) {
args.fGLSLGeneration = k110_GrGLSLGeneration;
}
// Many ES3 drivers only advertise the ES2 image_external extension, but support the _essl3
// extension, and require that it be enabled to work with ESSL3. Other devices require the ES2
// extension to be enabled, even when using ESSL3. Some devices appear to only support the ES2
// extension. As an extreme (optional) solution, we can fallback to using ES2 shading language
// if we want to prioritize external texture support. skbug.com/7713
if (GR_IS_GR_GL_ES(interface->fStandard) &&
options.fPreferExternalImagesOverES3 &&
!options.fDisableDriverCorrectnessWorkarounds &&
interface->hasExtension("GL_OES_EGL_image_external") &&
args.fGLSLGeneration >= k330_GrGLSLGeneration &&
!interface->hasExtension("GL_OES_EGL_image_external_essl3") &&
!interface->hasExtension("OES_EGL_image_external_essl3")) {
args.fGLSLGeneration = k110_GrGLSLGeneration;
}
GrGLGetDriverInfo(interface->fStandard, args.fVendor, renderer, ver,
&args.fDriver, &args.fDriverVersion);
args.fContextOptions = &options;
args.fInterface = std::move(interface);
return std::unique_ptr<GrGLContext>(new GrGLContext(std::move(args)));
}
