blob: c4d7608740176eeb680127bff9fb42238dfa78fa [file] [log] [blame]
/*
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "glimp/egl/display.h"
#include <algorithm>
#include <vector>
#include "glimp/egl/config.h"
#include "glimp/egl/error.h"
#include "starboard/log.h"
namespace glimp {
namespace egl {
Display::Display(nb::scoped_ptr<DisplayImpl> display_impl)
: impl_(display_impl.Pass()) {}
Display::~Display() {
SB_DCHECK(active_surfaces_.empty());
}
void Display::GetVersionInfo(EGLint* major, EGLint* minor) {
DisplayImpl::VersionInfo version_info = impl_->GetVersionInfo();
if (major) {
*major = version_info.major;
}
if (minor) {
*minor = version_info.minor;
}
}
bool Display::ChooseConfig(const EGLint* attrib_list,
EGLConfig* configs,
EGLint config_size,
EGLint* num_config) {
if (!num_config) {
SetError(EGL_BAD_PARAMETER);
return false;
}
AttribMap attribs = ParseRawAttribList(attrib_list);
if (!ValidateConfigAttribList(attribs)) {
SetError(EGL_BAD_ATTRIBUTE);
return false;
}
std::vector<Config*> configs_vector =
FilterConfigs(impl_->GetSupportedConfigs(), attribs);
SortConfigs(attribs, &configs_vector);
if (configs) {
*num_config =
std::min(config_size, static_cast<int>(configs_vector.size()));
for (int i = 0; i < *num_config; ++i) {
configs[i] = ToEGLConfig(configs_vector[i]);
}
} else {
*num_config = static_cast<int>(configs_vector.size());
}
return true;
}
bool Display::ConfigIsValid(EGLConfig config) {
const DisplayImpl::ConfigSet& supported_configs =
impl_->GetSupportedConfigs();
return supported_configs.find(reinterpret_cast<Config*>(config)) !=
supported_configs.end();
}
EGLSurface Display::CreateWindowSurface(EGLConfig config,
EGLNativeWindowType win,
const EGLint* attrib_list) {
AttribMap attribs = ParseRawAttribList(attrib_list);
if (!ValidateSurfaceAttribList(attribs)) {
SetError(EGL_BAD_ATTRIBUTE);
return EGL_NO_SURFACE;
}
if (!ConfigIsValid(config)) {
SetError(EGL_BAD_CONFIG);
return EGL_NO_SURFACE;
}
if (!((*reinterpret_cast<Config*>(config))[EGL_SURFACE_TYPE] |
EGL_WINDOW_BIT)) {
// The config used must have the EGL_WINDOW_BIT set in order for us to
// be able to create windows.
SetError(EGL_BAD_MATCH);
return EGL_NO_SURFACE;
}
nb::scoped_ptr<SurfaceImpl> surface_impl = impl_->CreateWindowSurface(
reinterpret_cast<Config*>(config), win, attribs);
if (!surface_impl) {
return EGL_NO_SURFACE;
}
Surface* surface = new Surface(surface_impl.Pass());
active_surfaces_.insert(surface);
return ToEGLSurface(surface);
}
EGLSurface Display::CreatePbufferSurface(EGLConfig config,
const EGLint* attrib_list) {
AttribMap attribs = ParseRawAttribList(attrib_list);
if (!ValidateSurfaceAttribList(attribs)) {
SetError(EGL_BAD_ATTRIBUTE);
return EGL_NO_SURFACE;
}
if (!ConfigIsValid(config)) {
SetError(EGL_BAD_CONFIG);
return EGL_NO_SURFACE;
}
if (!((*reinterpret_cast<Config*>(config))[EGL_SURFACE_TYPE] |
EGL_PBUFFER_BIT)) {
// The config used must have the EGL_PBUFFER_BIT set in order for us to
// be able to create pbuffers.
SetError(EGL_BAD_MATCH);
return EGL_NO_SURFACE;
}
nb::scoped_ptr<SurfaceImpl> surface_impl =
impl_->CreatePbufferSurface(reinterpret_cast<Config*>(config), attribs);
if (!surface_impl) {
return EGL_NO_SURFACE;
}
Surface* surface = new Surface(surface_impl.Pass());
active_surfaces_.insert(surface);
return ToEGLSurface(surface);
}
bool Display::SurfaceIsValid(EGLSurface surface) {
return active_surfaces_.find(FromEGLSurface(surface)) !=
active_surfaces_.end();
}
bool Display::DestroySurface(EGLSurface surface) {
if (!SurfaceIsValid(surface)) {
SetError(EGL_BAD_SURFACE);
return false;
}
Surface* surf = FromEGLSurface(surface);
active_surfaces_.erase(surf);
delete surf;
return true;
}
namespace {
// Returns -1 if the context attributes are invalid.
int GetContextVersion(const EGLint* attrib_list) {
AttribMap attribs = ParseRawAttribList(attrib_list);
// According to
// https://www.khronos.org/registry/egl/sdk/docs/man/html/eglCreateContext.xhtml,
// the default version of the GL ES context is 1.
if (attribs.empty()) {
return 1;
}
// EGL_CONTEXT_CLIENT_VERSION is the only valid attribute for CreateContext.
AttribMap::const_iterator found = attribs.find(EGL_CONTEXT_CLIENT_VERSION);
if (found == attribs.end()) {
// If we didn't find it, and the attribute list is not empty (checked above)
// then this is an invalid attribute list.
return -1;
} else {
return found->second;
}
}
} // namespace
EGLContext Display::CreateContext(EGLConfig config,
EGLContext share_context,
const EGLint* attrib_list) {
// glimp only supports GL ES versions 2 and 3.
int context_version = GetContextVersion(attrib_list);
if (context_version != 2 && context_version != 3) {
SetError(EGL_BAD_ATTRIBUTE);
return EGL_NO_CONTEXT;
}
if (!ConfigIsValid(config)) {
SetError(EGL_BAD_CONFIG);
return EGL_NO_CONTEXT;
}
// Ensure that |share_context| is either unspecified, or valid.
gles::Context* share = NULL;
if (share_context != EGL_NO_CONTEXT) {
if (!ContextIsValid(share_context)) {
SetError(EGL_BAD_CONTEXT);
return EGL_NO_CONTEXT;
}
share = reinterpret_cast<gles::Context*>(share_context);
}
nb::scoped_ptr<gles::ContextImpl> context_impl =
impl_->CreateContext(reinterpret_cast<Config*>(config), context_version);
if (!context_impl) {
return EGL_NO_CONTEXT;
}
gles::Context* context = new gles::Context(context_impl.Pass(), share);
active_contexts_.insert(context);
return reinterpret_cast<EGLContext>(context);
}
bool Display::ContextIsValid(EGLContext context) {
return active_contexts_.find(reinterpret_cast<gles::Context*>(context)) !=
active_contexts_.end();
}
bool Display::DestroyContext(EGLContext ctx) {
if (!ContextIsValid(ctx)) {
SetError(EGL_BAD_CONTEXT);
return false;
}
gles::Context* context = reinterpret_cast<gles::Context*>(ctx);
active_contexts_.erase(context);
delete context;
return true;
}
bool Display::MakeCurrent(EGLSurface draw, EGLSurface read, EGLContext ctx) {
if (draw == EGL_NO_SURFACE && read == EGL_NO_SURFACE &&
ctx == EGL_NO_CONTEXT) {
if (!ContextIsValid(reinterpret_cast<EGLContext>(
gles::Context::GetTLSCurrentContext()))) {
SB_DLOG(WARNING)
<< "Attempted to release a context not owned by this display.";
SetError(EGL_BAD_CONTEXT);
return false;
}
gles::Context::ReleaseTLSCurrentContext();
return true;
}
if (!ContextIsValid(ctx)) {
SetError(EGL_BAD_CONTEXT);
return false;
}
if (!SurfaceIsValid(draw)) {
SetError(EGL_BAD_SURFACE);
return false;
}
if (!SurfaceIsValid(read)) {
SetError(EGL_BAD_SURFACE);
return false;
}
return gles::Context::SetTLSCurrentContext(
reinterpret_cast<gles::Context*>(ctx), FromEGLSurface(draw),
FromEGLSurface(read));
}
bool Display::SwapBuffers(EGLSurface surface) {
if (!SurfaceIsValid(surface)) {
SetError(EGL_BAD_SURFACE);
return false;
}
Surface* surface_object = FromEGLSurface(surface);
gles::Context* current_context = gles::Context::GetTLSCurrentContext();
if (!ContextIsValid(reinterpret_cast<EGLContext>(current_context))) {
// The specification for eglSwapBuffers() does not explicitly state that
// the surface's context needs to be current when eglSwapBuffers() is
// called, but we enforce this in glimp as it is a very typical use-case and
// it considerably simplifies the process.
SB_DLOG(WARNING)
<< "eglSwapBuffers() called when no or an invalid context was current.";
SetError(EGL_BAD_SURFACE);
return false;
}
if (current_context->draw_surface() != surface_object) {
SB_DLOG(WARNING)
<< "eglSwapBuffers() called on a surface that is not the draw surface "
<< "of the current context.";
SetError(EGL_BAD_SURFACE);
return false;
}
current_context->SwapBuffers();
return true;
}
bool Display::SwapInterval(EGLint interval) {
return impl_->SetSwapInterval(interval);
}
} // namespace egl
} // namespace glimp