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#include "context.h"
#include "../log.h"
#include "loader.h"
#include <cstdlib>
#include <cstring>
#ifdef __APPLE__
#include <stdlib.h>
#else
#include <malloc.h>
#endif
Log_SetChannel(GL::Context);
#if defined(_WIN32)
#include "context_wgl.h"
#elif defined(__APPLE__)
#include "context_agl.h"
#else
#include "context_egl_wayland.h"
#include "context_egl_x11.h"
#include "context_glx.h"
#endif
namespace GL {
static bool ShouldPreferESContext()
{
#ifndef _MSC_VER
const char* value = std::getenv("PREFER_GLES_CONTEXT");
return (value && strcmp(value, "1") == 0);
#else
char buffer[2] = {};
size_t buffer_size = sizeof(buffer);
getenv_s(&buffer_size, buffer, "PREFER_GLES_CONTEXT");
return (std::strcmp(buffer, "1") == 0);
#endif
}
Context::Context(const WindowInfo& wi) : m_wi(wi) {}
Context::~Context() = default;
std::vector<Context::FullscreenModeInfo> Context::EnumerateFullscreenModes()
{
return {};
}
std::unique_ptr<GL::Context> Context::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
if (ShouldPreferESContext())
{
// move ES versions to the front
Version* new_versions_to_try = static_cast<Version*>(alloca(sizeof(Version) * num_versions_to_try));
size_t count = 0;
for (size_t i = 0; i < num_versions_to_try; i++)
{
if (versions_to_try[i].profile == Profile::ES)
new_versions_to_try[count++] = versions_to_try[i];
}
for (size_t i = 0; i < num_versions_to_try; i++)
{
if (versions_to_try[i].profile != Profile::ES)
new_versions_to_try[count++] = versions_to_try[i];
}
versions_to_try = new_versions_to_try;
}
std::unique_ptr<Context> context;
#if defined(_WIN32)
context = ContextWGL::Create(wi, versions_to_try, num_versions_to_try);
#elif defined(__APPLE__)
context = ContextAGL::Create(wi, versions_to_try, num_versions_to_try);
#else
if (wi.type == WindowInfo::Type::X11)
{
const char* use_egl_x11 = std::getenv("USE_EGL_X11");
if (use_egl_x11 && std::strcmp(use_egl_x11, "1") == 0)
context = ContextEGLX11::Create(wi, versions_to_try, num_versions_to_try);
else
context = ContextGLX::Create(wi, versions_to_try, num_versions_to_try);
}
if (wi.type == WindowInfo::Type::Wayland)
context = ContextEGLWayland::Create(wi, versions_to_try, num_versions_to_try);
#endif
if (!context)
return nullptr;
Log_InfoPrintf("Created a %s context", context->IsGLES() ? "OpenGL ES" : "OpenGL");
// TODO: Not thread-safe.
static Context* context_being_created;
context_being_created = context.get();
if (!gladLoadGLLoader([](const char* name) { return context_being_created->GetProcAddress(name); }))
{
Log_ErrorPrintf("Failed to load GL functions for GLAD");
return nullptr;
}
const char* gl_vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
const char* gl_renderer = reinterpret_cast<const char*>(glGetString(GL_RENDERER));
const char* gl_version = reinterpret_cast<const char*>(glGetString(GL_VERSION));
const char* gl_shading_language_version = reinterpret_cast<const char*>(glGetString(GL_SHADING_LANGUAGE_VERSION));
Log_InfoPrintf("GL_VENDOR: %s", gl_vendor);
Log_InfoPrintf("GL_RENDERER: %s", gl_renderer);
Log_InfoPrintf("GL_VERSION: %s", gl_version);
Log_InfoPrintf("GL_SHADING_LANGUAGE_VERSION: %s", gl_shading_language_version);
return context;
}
const std::array<Context::Version, 11>& Context::GetAllDesktopVersionsList()
{
static constexpr std::array<Version, 11> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0}}};
return vlist;
}
const std::array<Context::Version, 12>& Context::GetAllDesktopVersionsListWithFallback()
{
static constexpr std::array<Version, 12> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0},
{Profile::NoProfile, 0, 0}}};
return vlist;
}
const std::array<Context::Version, 4>& Context::GetAllESVersionsList()
{
static constexpr std::array<Version, 4> vlist = {
{{Profile::ES, 3, 2}, {Profile::ES, 3, 1}, {Profile::ES, 3, 0}, {Profile::ES, 2, 0}}};
return vlist;
}
const std::array<Context::Version, 16>& Context::GetAllVersionsList()
{
static constexpr std::array<Version, 16> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0},
{Profile::ES, 3, 2},
{Profile::ES, 3, 1},
{Profile::ES, 3, 0},
{Profile::ES, 2, 0},
{Profile::NoProfile, 0, 0}}};
return vlist;
}
} // namespace GL
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