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#include "opengl.h"
#include "common/debug.h"
#include "common/library.h"
#if __has_include(<GL/gl.h>)
#include <GL/gl.h>
#elif __APPLE__
#define GL_SILENCE_DEPRECATION 1
#include <OpenGL/gl.h>
#else
#define FF_HAVE_NO_GL 1
#endif
#ifndef FF_HAVE_NO_GL
#ifndef GL_SHADING_LANGUAGE_VERSION // For WGL
#define GL_SHADING_LANGUAGE_VERSION 0x8B8C
#endif
void ffOpenGLHandleResult(FFOpenGLResult* result, __typeof__(&glGetString) ffglGetString) {
ffStrbufAppendS(&result->version, (const char*) ffglGetString(GL_VERSION));
ffStrbufAppendS(&result->renderer, (const char*) ffglGetString(GL_RENDERER));
ffStrbufAppendS(&result->vendor, (const char*) ffglGetString(GL_VENDOR));
ffStrbufAppendS(&result->slv, (const char*) ffglGetString(GL_SHADING_LANGUAGE_VERSION));
}
#if defined(FF_HAVE_EGL) || __has_include(<EGL/egl.h>)
#include "common/io.h"
#define EGL_EGL_PROTOTYPES 1
#define EGL_EGLEXT_PROTOTYPES 1
#include <EGL/egl.h>
#include <EGL/eglext.h>
typedef struct EGLData {
FF_LIBRARY_SYMBOL(glGetString)
FF_LIBRARY_SYMBOL(eglGetProcAddress)
FF_LIBRARY_SYMBOL(eglGetDisplay)
FF_LIBRARY_SYMBOL(eglQueryString)
FF_LIBRARY_SYMBOL(eglInitialize)
FF_LIBRARY_SYMBOL(eglBindAPI)
FF_LIBRARY_SYMBOL(eglGetConfigs)
FF_LIBRARY_SYMBOL(eglCreatePbufferSurface)
FF_LIBRARY_SYMBOL(eglCreateContext)
FF_LIBRARY_SYMBOL(eglMakeCurrent)
FF_LIBRARY_SYMBOL(eglDestroyContext)
FF_LIBRARY_SYMBOL(eglDestroySurface)
FF_LIBRARY_SYMBOL(eglTerminate)
EGLDisplay display;
EGLConfig config;
EGLSurface surface;
EGLContext context;
} EGLData;
static const char* eglHandleContext(FFOpenGLResult* result, EGLData* data) {
FF_DEBUG("Making EGL context current");
if (data->ffeglMakeCurrent(data->display, data->surface, data->surface, data->context) != EGL_TRUE) {
FF_DEBUG("eglMakeCurrent() returned EGL_FALSE");
return "eglMakeCurrent returned EGL_FALSE";
}
ffOpenGLHandleResult(result, data->ffglGetString);
ffStrbufSetF(&result->library, "EGL %s", data->ffeglQueryString(data->display, EGL_VERSION));
FF_DEBUG("OpenGL via EGL detected: version='%s', renderer='%s', vendor='%s', slv='%s', library='%s'",
result->version.chars,
result->renderer.chars,
result->vendor.chars,
result->slv.chars,
result->library.chars);
return NULL;
}
static const char* eglHandleSurface(FFOpenGLResult* result, EGLData* data, bool gles) {
FF_DEBUG("Creating EGL context (preferred API=%s, client version=%d)", gles ? "OpenGL ES" : "OpenGL", gles ? 2 : 1);
data->context = data->ffeglCreateContext(data->display, data->config, EGL_NO_CONTEXT, (EGLint[]) { EGL_CONTEXT_CLIENT_VERSION, gles ? 2 : 1, // Try GLES 2.0+ first
EGL_NONE });
if (data->context == EGL_NO_CONTEXT && gles) // Some ANGLE builds support GLES 1.1 only
{
FF_DEBUG("EGL context creation with GLES 2.x failed, retrying with default attributes (GLES 1.1 fallback)");
data->context = data->ffeglCreateContext(data->display, data->config, EGL_NO_CONTEXT, (EGLint[]) { EGL_NONE });
}
if (data->context == EGL_NO_CONTEXT) {
FF_DEBUG("eglCreateContext() returned EGL_NO_CONTEXT");
return "eglCreateContext returned EGL_NO_CONTEXT";
}
FF_DEBUG("EGL context created successfully");
const char* error = eglHandleContext(result, data);
FF_DEBUG("eglHandleContext() returns: %s", error ?: "success");
FF_DEBUG("Releasing current EGL context");
data->ffeglMakeCurrent(data->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
FF_DEBUG("Destroying EGL context");
data->ffeglDestroyContext(data->display, data->context);
return error;
}
static const char* eglHandleDisplay(FFOpenGLResult* result, EGLData* data) {
// try use OpenGL API. If failed, use the default API (usually OpenGL ES)
bool gles = !data->ffeglBindAPI(EGL_OPENGL_API);
FF_DEBUG("eglBindAPI(EGL_OPENGL_API) %s, effective API=%s",
gles ? "failed" : "succeeded",
gles ? "default (usually OpenGL ES)" : "OpenGL");
EGLint eglConfigCount;
data->ffeglGetConfigs(data->display, &data->config, 1, &eglConfigCount);
FF_DEBUG("eglGetConfigs() returned %d config(s)", eglConfigCount);
if (eglConfigCount == 0) {
FF_DEBUG("No EGL config is available");
return "eglGetConfigs returned 0 configs";
}
FF_DEBUG("Creating EGL pbuffer surface (%dx%d)", FF_OPENGL_BUFFER_WIDTH, FF_OPENGL_BUFFER_HEIGHT);
data->surface = data->ffeglCreatePbufferSurface(data->display, data->config, (EGLint[]) { EGL_WIDTH, FF_OPENGL_BUFFER_WIDTH, EGL_HEIGHT, FF_OPENGL_BUFFER_HEIGHT, EGL_NONE });
if (data->surface == EGL_NO_SURFACE) {
FF_DEBUG("eglCreatePbufferSurface() returned EGL_NO_SURFACE");
return "eglCreatePbufferSurface returned EGL_NO_SURFACE";
}
FF_DEBUG("EGL pbuffer surface created successfully");
const char* error = eglHandleSurface(result, data, gles);
FF_DEBUG("eglHandleSurface() returns: %s", error ?: "success");
FF_DEBUG("Destroying EGL surface");
data->ffeglDestroySurface(data->display, data->surface);
return error;
}
static const char* eglHandleData(FFOpenGLResult* result, EGLData* data) {
FF_DEBUG("Resolving glGetString via eglGetProcAddress()");
data->ffglGetString = (__typeof__(&glGetString)) data->ffeglGetProcAddress("glGetString");
if (!data->ffglGetString) {
FF_DEBUG("eglGetProcAddress('glGetString') returned NULL");
return "eglGetProcAddress(glGetString) returned NULL";
}
#if EGL_VERSION_1_5
PFNEGLGETPLATFORMDISPLAYEXTPROC ffeglGetPlatformDisplay = (PFNEGLGETPLATFORMDISPLAYEXTPROC) data->ffeglGetProcAddress("eglGetPlatformDisplay");
if (ffeglGetPlatformDisplay) {
FF_DEBUG("Trying eglGetPlatformDisplay(EGL_PLATFORM_SURFACELESS_MESA)");
data->display = ffeglGetPlatformDisplay(EGL_PLATFORM_SURFACELESS_MESA, NULL, NULL);
FF_DEBUG("eglGetPlatformDisplay() %s", data->display == EGL_NO_DISPLAY ? "failed" : "succeeded");
} else {
FF_DEBUG("eglGetPlatformDisplay is unavailable, falling back to eglGetDisplay");
}
if (!ffeglGetPlatformDisplay || data->display == EGL_NO_DISPLAY)
#endif
{
FF_DEBUG("Trying eglGetDisplay(EGL_DEFAULT_DISPLAY)");
data->display = data->ffeglGetDisplay(EGL_DEFAULT_DISPLAY);
if (data->display == EGL_NO_DISPLAY) {
FF_DEBUG("eglGetDisplay() returned EGL_NO_DISPLAY");
return "eglGetDisplay returned EGL_NO_DISPLAY";
}
FF_DEBUG("eglGetDisplay() succeeded");
}
EGLint major, minor;
if (data->ffeglInitialize(data->display, &major, &minor) == EGL_FALSE) {
FF_DEBUG("eglInitialize() returned EGL_FALSE");
return "eglInitialize returned EGL_FALSE";
}
FF_DEBUG("EGL initialized successfully: %d.%d", major, minor);
const char* error = eglHandleDisplay(result, data);
FF_DEBUG("eglHandleDisplay() returns: %s", error ?: "success");
FF_DEBUG("Terminating EGL display connection");
data->ffeglTerminate(data->display);
return error;
}
const char* ffOpenGLDetectByEGL(FFOpenGLResult* result) {
FF_DEBUG("Starting OpenGL detection via EGL");
EGLData eglData;
FF_LIBRARY_LOAD_MESSAGE(egl, "libEGL" FF_LIBRARY_EXTENSION, 1);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglGetProcAddress);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglGetDisplay);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglQueryString);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglInitialize);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglBindAPI);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglGetConfigs);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglCreatePbufferSurface);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglCreateContext);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglMakeCurrent);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglDestroyContext);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglDestroySurface);
FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(egl, eglData, eglTerminate);
FF_DEBUG("Loaded EGL library and required symbols");
FF_SUPPRESS_IO();
FF_DEBUG("Suppressed stdout/stderr during EGL probing");
const char* error = eglHandleData(result, &eglData);
FF_DEBUG("OpenGL detection via EGL returns: %s", error ?: "success");
return error;
}
#endif // FF_HAVE_EGL
#endif // FF_HAVE_NO_GL
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