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GLContext: Support GLES on WGL 

GLES is not automatically used, but will be used if `PreferGLES` is specified in GFX.ini under `[Settings]`.
This commit is contained in:
Pokechu22 2022-12-31 18:25:37 -08:00
parent 7752e247f7
commit 1ce4722776
2 changed files with 72 additions and 10 deletions
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79
Source/Core/Common/GL/GLInterface/WGL.cpp
View File

@ -113,6 +113,18 @@ typedef HGLRC(WINAPI* PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC hDC, HGLRC hShareCo
#define ERROR_INVALID_PROFILE_ARB 0x2096
#endif /* WGL_ARB_create_context_profile */
#ifndef WGL_ARB_extensions_string
#define WGL_ARB_extensions_string 1
typedef const char*(WINAPI* PFNWGLGETEXTENSIONSSTRINGARBPROC)(HDC hdc);
#endif /* WGL_ARB_extensions_string */
// Per https://registry.khronos.org/OpenGL/extensions/EXT/WGL_EXT_create_context_es2_profile.txt
// this is equivalent to WGL_EXT_create_context_es_profile (it can create any ES context)
#ifndef WGL_EXT_create_context_es2_profile
#define WGL_EXT_create_context_es2_profile 1
#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
#endif /* WGL_EXT_create_context_es2_profile */
#ifndef WGL_EXT_swap_control
#define WGL_EXT_swap_control 1
typedef BOOL(WINAPI* PFNWGLSWAPINTERVALEXTPROC)(int interval);
@ -127,6 +139,7 @@ static PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = nullptr;
static PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = nullptr;
static PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = nullptr;
static PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = nullptr;
static PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = nullptr;
static void LoadWGLExtensions()
{
@ -144,6 +157,8 @@ static void LoadWGLExtensions()
reinterpret_cast<PFNWGLRELEASEPBUFFERDCARBPROC>(wglGetProcAddress("wglReleasePbufferDCARB"));
wglDestroyPbufferARB =
reinterpret_cast<PFNWGLDESTROYPBUFFERARBPROC>(wglGetProcAddress("wglGetPbufferDCARB"));
wglGetExtensionsStringARB = reinterpret_cast<PFNWGLGETEXTENSIONSSTRINGARBPROC>(
wglGetProcAddress("wglGetExtensionsStringARB"));
}
static void ClearWGLExtensionPointers()
@ -155,6 +170,7 @@ static void ClearWGLExtensionPointers()
wglGetPbufferDCARB = nullptr;
wglReleasePbufferDCARB = nullptr;
wglDestroyPbufferARB = nullptr;
wglGetExtensionsStringARB = nullptr;
}
GLContextWGL::~GLContextWGL()
@ -301,9 +317,6 @@ bool GLContextWGL::Initialize(const WindowSystemInfo& wsi, bool stereo, bool cor
return false;
}
// WGL only supports desktop GL, for now.
m_opengl_mode = Mode::OpenGL;
if (core)
{
// Make the fallback context current, temporarily.
@ -318,7 +331,7 @@ bool GLContextWGL::Initialize(const WindowSystemInfo& wsi, bool stereo, bool cor
LoadWGLExtensions();
// Attempt creating a core context.
HGLRC core_context = CreateCoreContext(m_dc, nullptr);
HGLRC core_context = CreateCoreContext(m_dc, nullptr, &m_opengl_mode);
// Switch out the temporary context before continuing, regardless of whether we got a core
// context. If we didn't get a core context, the caller expects that the context is not current.
@ -351,7 +364,7 @@ std::unique_ptr<GLContext> GLContextWGL::CreateSharedContext()
if (!CreatePBuffer(m_dc, 1, 1, &pbuffer, &dc))
return nullptr;
HGLRC rc = CreateCoreContext(dc, m_rc);
HGLRC rc = CreateCoreContext(dc, m_rc, &m_opengl_mode);
if (!rc)
{
wglReleasePbufferDCARB(static_cast<HPBUFFERARB>(pbuffer), dc);
@ -368,7 +381,35 @@ std::unique_ptr<GLContext> GLContextWGL::CreateSharedContext()
return context;
}
HGLRC GLContextWGL::CreateCoreContext(HDC dc, HGLRC share_context)
bool GLContextWGL::CheckForGLES(HDC dc)
{
if (!wglGetExtensionsStringARB)
{
WARN_LOG_FMT(VIDEO, "Missing wglGetExtensionsStringARB extension; disabling GLES");
return false;
}
bool has_es_ext = false;
std::string tmp;
std::istringstream buffer(wglGetExtensionsStringARB(dc));
while (buffer >> tmp)
{
if (tmp == "WGL_EXT_create_context_es2_profile")
{
has_es_ext = true;
break;
}
}
if (!has_es_ext)
{
WARN_LOG_FMT(VIDEO, "Missing WGL_EXT_create_context_es2_profile extension; disabling GLES");
return false;
}
return true;
}
HGLRC GLContextWGL::CreateCoreContext(HDC dc, HGLRC share_context, Mode* mode)
{
if (!wglCreateContextAttribsARB)
{
@ -376,11 +417,29 @@ HGLRC GLContextWGL::CreateCoreContext(HDC dc, HGLRC share_context)
return nullptr;
}
int profile_mask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
if (*mode == Mode::Detect)
{
*mode = Mode::OpenGL;
}
else if (*mode == Mode::OpenGLES)
{
if (CheckForGLES(dc))
{
profile_mask = WGL_CONTEXT_ES2_PROFILE_BIT_EXT;
}
else
{
*mode = Mode::OpenGL;
}
}
for (const auto& version : s_desktop_opengl_versions)
{
// Construct list of attributes. Prefer a forward-compatible, core context.
std::array<int, 5 * 2> attribs = {WGL_CONTEXT_PROFILE_MASK_ARB,
WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
profile_mask,
#ifdef _DEBUG
WGL_CONTEXT_FLAGS_ARB,
WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB |
@ -400,12 +459,14 @@ HGLRC GLContextWGL::CreateCoreContext(HDC dc, HGLRC share_context)
HGLRC core_context = wglCreateContextAttribsARB(dc, share_context, attribs.data());
if (core_context)
{
INFO_LOG_FMT(VIDEO, "WGL: Created a GL {}.{} core context", version.first, version.second);
INFO_LOG_FMT(VIDEO, "WGL: Created a GL{} {}.{} core context",
*mode == Mode::OpenGLES ? "ES" : "", version.first, version.second);
return core_context;
}
}
WARN_LOG_FMT(VIDEO, "Unable to create a core OpenGL context of an acceptable version");
WARN_LOG_FMT(VIDEO, "Unable to create a core OpenGL{} context of an acceptable version",
*mode == Mode::OpenGLES ? "ES" : "");
return nullptr;
}

3
Source/Core/Common/GL/GLInterface/WGL.h
View File

@ -29,7 +29,8 @@ public:
protected:
bool Initialize(const WindowSystemInfo& wsi, bool stereo, bool core) override;
static HGLRC CreateCoreContext(HDC dc, HGLRC share_context);
static bool CheckForGLES(HDC dc);
static HGLRC CreateCoreContext(HDC dc, HGLRC share_context, Mode* mode);
static bool CreatePBuffer(HDC onscreen_dc, int width, int height, HANDLE* pbuffer_handle,
HDC* pbuffer_dc);