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1280 lines (1108 loc) · 44.8 KB
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/*
* Simple DirectMedia Layer
* Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
#ifdef SDL_VIDEO_OPENGL_EGL
#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_WINRT)
#include "../core/windows/SDL_windows.h"
#endif
#ifdef SDL_VIDEO_DRIVER_ANDROID
#include <android/native_window.h>
#include "../video/android/SDL_androidvideo.h"
#endif
#ifdef SDL_VIDEO_DRIVER_RPI
#include <unistd.h>
#endif
#include "SDL_sysvideo.h"
#include "SDL_egl_c.h"
#include "SDL_loadso.h"
#include "SDL_hints.h"
#ifdef EGL_KHR_create_context
/* EGL_OPENGL_ES3_BIT_KHR was added in version 13 of the extension. */
#ifndef EGL_OPENGL_ES3_BIT_KHR
#define EGL_OPENGL_ES3_BIT_KHR 0x00000040
#endif
#endif /* EGL_KHR_create_context */
#ifndef EGL_EXT_pixel_format_float
#define EGL_EXT_pixel_format_float
#define EGL_COLOR_COMPONENT_TYPE_EXT 0x3339
#define EGL_COLOR_COMPONENT_TYPE_FIXED_EXT 0x333A
#define EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT 0x333B
#endif
#ifndef EGL_EXT_present_opaque
#define EGL_EXT_present_opaque 1
#define EGL_PRESENT_OPAQUE_EXT 0x31DF
#endif /* EGL_EXT_present_opaque */
#ifdef SDL_VIDEO_DRIVER_RPI
/* Raspbian places the OpenGL ES/EGL binaries in a non standard path */
#define DEFAULT_EGL (vc4 ? "libEGL.so.1" : "libbrcmEGL.so")
#define DEFAULT_OGL_ES2 (vc4 ? "libGLESv2.so.2" : "libbrcmGLESv2.so")
#define ALT_EGL "libEGL.so"
#define ALT_OGL_ES2 "libGLESv2.so"
#define DEFAULT_OGL_ES_PVR (vc4 ? "libGLES_CM.so.1" : "libbrcmGLESv2.so")
#define DEFAULT_OGL_ES (vc4 ? "libGLESv1_CM.so.1" : "libbrcmGLESv2.so")
#elif defined(SDL_VIDEO_DRIVER_ANDROID) || defined(SDL_VIDEO_DRIVER_VIVANTE)
/* Android */
#define DEFAULT_EGL "libEGL.so"
#define DEFAULT_OGL_ES2 "libGLESv2.so"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
#define DEFAULT_OGL_ES "libGLESv1_CM.so"
#elif defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_WINRT)
/* EGL AND OpenGL ES support via ANGLE */
#define DEFAULT_EGL "libEGL.dll"
#define DEFAULT_OGL_ES2 "libGLESv2.dll"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.dll"
#define DEFAULT_OGL_ES "libGLESv1_CM.dll"
#elif defined(SDL_VIDEO_DRIVER_COCOA)
/* EGL AND OpenGL ES support via ANGLE */
#define DEFAULT_EGL "libEGL.dylib"
#define DEFAULT_OGL_ES2 "libGLESv2.dylib"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.dylib" //???
#define DEFAULT_OGL_ES "libGLESv1_CM.dylib" //???
#elif defined(__OpenBSD__)
/* OpenBSD */
#define DEFAULT_OGL "libGL.so"
#define DEFAULT_EGL "libEGL.so"
#define DEFAULT_OGL_ES2 "libGLESv2.so"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
#define DEFAULT_OGL_ES "libGLESv1_CM.so"
#else
/* Desktop Linux/Unix-like */
#define DEFAULT_OGL "libGL.so.1"
#define DEFAULT_EGL "libEGL.so.1"
#define ALT_OGL "libOpenGL.so.0"
#define DEFAULT_OGL_ES2 "libGLESv2.so.2"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1"
#define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
#endif /* SDL_VIDEO_DRIVER_RPI */
#if defined(SDL_VIDEO_OPENGL) && !defined(SDL_VIDEO_VITA_PVR_OGL)
#include "SDL_opengl.h"
#endif
/** If we happen to not have this defined because of an older EGL version, just define it 0x0
as eglGetPlatformDisplayEXT will most likely be NULL if this is missing
*/
#ifndef EGL_PLATFORM_DEVICE_EXT
#define EGL_PLATFORM_DEVICE_EXT 0x0
#endif
#if defined(SDL_VIDEO_STATIC_ANGLE) || defined(SDL_VIDEO_DRIVER_VITA)
#define LOAD_FUNC(NAME) \
_this->egl_data->NAME = (void *)NAME;
#else
#define LOAD_FUNC(NAME) \
_this->egl_data->NAME = SDL_LoadFunction(_this->egl_data->egl_dll_handle, #NAME); \
if (!_this->egl_data->NAME) { \
return SDL_SetError("Could not retrieve EGL function " #NAME); \
}
#endif
/* it is allowed to not have some of the EGL extensions on start - attempts to use them will fail later. */
#define LOAD_FUNC_EGLEXT(NAME) \
_this->egl_data->NAME = _this->egl_data->eglGetProcAddress(#NAME);
static const char *SDL_EGL_GetErrorName(EGLint eglErrorCode)
{
#define SDL_EGL_ERROR_TRANSLATE(e) \
case e: \
return #e;
switch (eglErrorCode) {
SDL_EGL_ERROR_TRANSLATE(EGL_SUCCESS);
SDL_EGL_ERROR_TRANSLATE(EGL_NOT_INITIALIZED);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ACCESS);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ALLOC);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ATTRIBUTE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONTEXT);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONFIG);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CURRENT_SURFACE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_DISPLAY);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_SURFACE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_MATCH);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_PARAMETER);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_PIXMAP);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_WINDOW);
SDL_EGL_ERROR_TRANSLATE(EGL_CONTEXT_LOST);
}
return "";
}
int SDL_EGL_SetErrorEx(const char *message, const char *eglFunctionName, EGLint eglErrorCode)
{
const char *errorText = SDL_EGL_GetErrorName(eglErrorCode);
char altErrorText[32];
if (errorText[0] == '\0') {
/* An unknown-to-SDL error code was reported. Report its hexadecimal value, instead of its name. */
(void)SDL_snprintf(altErrorText, SDL_arraysize(altErrorText), "0x%x", (unsigned int)eglErrorCode);
errorText = altErrorText;
}
return SDL_SetError("%s (call to %s failed, reporting an error of %s)", message, eglFunctionName, errorText);
}
/* EGL implementation of SDL OpenGL ES support */
SDL_bool SDL_EGL_HasExtension(_THIS, SDL_EGL_ExtensionType type, const char *ext)
{
size_t ext_len;
const char *ext_override;
const char *egl_extstr;
const char *ext_start;
/* Invalid extensions can be rejected early */
if (!ext || *ext == 0 || SDL_strchr(ext, ' ') != NULL) {
/* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid EGL extension"); */
return SDL_FALSE;
}
/* Extensions can be masked with an environment variable.
* Unlike the OpenGL override, this will use the set bits of an integer
* to disable the extension.
* Bit Action
* 0 If set, the display extension is masked and not present to SDL.
* 1 If set, the client extension is masked and not present to SDL.
*/
ext_override = SDL_getenv(ext);
if (ext_override) {
int disable_ext = SDL_atoi(ext_override);
if (disable_ext & 0x01 && type == SDL_EGL_DISPLAY_EXTENSION) {
return SDL_FALSE;
} else if (disable_ext & 0x02 && type == SDL_EGL_CLIENT_EXTENSION) {
return SDL_FALSE;
}
}
ext_len = SDL_strlen(ext);
switch (type) {
case SDL_EGL_DISPLAY_EXTENSION:
egl_extstr = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_EXTENSIONS);
break;
case SDL_EGL_CLIENT_EXTENSION:
/* EGL_EXT_client_extensions modifies eglQueryString to return client extensions
* if EGL_NO_DISPLAY is passed. Implementations without it are required to return NULL.
* This behavior is included in EGL 1.5.
*/
egl_extstr = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
break;
default:
/* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid extension type"); */
return SDL_FALSE;
}
if (egl_extstr) {
ext_start = egl_extstr;
while (*ext_start) {
ext_start = SDL_strstr(ext_start, ext);
if (!ext_start) {
return SDL_FALSE;
}
/* Check if the match is not just a substring of one of the extensions */
if (ext_start == egl_extstr || *(ext_start - 1) == ' ') {
if (ext_start[ext_len] == ' ' || ext_start[ext_len] == 0) {
return SDL_TRUE;
}
}
/* If the search stopped in the middle of an extension, skip to the end of it */
ext_start += ext_len;
while (*ext_start != ' ' && *ext_start != 0) {
ext_start++;
}
}
}
return SDL_FALSE;
}
void *SDL_EGL_GetProcAddress(_THIS, const char *proc)
{
void *retval = NULL;
if (_this->egl_data) {
const Uint32 eglver = (((Uint32)_this->egl_data->egl_version_major) << 16) | ((Uint32)_this->egl_data->egl_version_minor);
const SDL_bool is_egl_15_or_later = eglver >= ((((Uint32)1) << 16) | 5);
/* EGL 1.5 can use eglGetProcAddress() for any symbol. 1.4 and earlier can't use it for core entry points. */
if (!retval && is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
#if !defined(__EMSCRIPTEN__) && !defined(SDL_VIDEO_DRIVER_VITA) /* LoadFunction isn't needed on Emscripten and will call dlsym(), causing other problems. */
/* Try SDL_LoadFunction() first for EGL <= 1.4, or as a fallback for >= 1.5. */
if (!retval) {
retval = SDL_LoadFunction(_this->egl_data->opengl_dll_handle, proc);
}
#endif
/* Try eglGetProcAddress if we're on <= 1.4 and still searching... */
if (!retval && !is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
}
return retval;
}
void SDL_EGL_UnloadLibrary(_THIS)
{
if (_this->egl_data) {
if (_this->egl_data->egl_display) {
_this->egl_data->eglTerminate(_this->egl_data->egl_display);
_this->egl_data->egl_display = NULL;
}
if (_this->egl_data->egl_dll_handle) {
SDL_UnloadObject(_this->egl_data->egl_dll_handle);
_this->egl_data->egl_dll_handle = NULL;
}
if (_this->egl_data->opengl_dll_handle) {
SDL_UnloadObject(_this->egl_data->opengl_dll_handle);
_this->egl_data->opengl_dll_handle = NULL;
}
SDL_free(_this->egl_data);
_this->egl_data = NULL;
}
}
static int SDL_EGL_LoadLibraryInternal(_THIS, const char *egl_path)
{
void *egl_dll_handle = NULL, *opengl_dll_handle = NULL;
const char *path = NULL;
#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_WINRT)
const char *d3dcompiler;
#endif
#ifdef SDL_VIDEO_DRIVER_RPI
SDL_bool vc4 = (0 == access("/sys/module/vc4/", F_OK));
#endif
#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_WINRT)
d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER);
if (d3dcompiler) {
if (SDL_strcasecmp(d3dcompiler, "none") != 0) {
if (SDL_LoadObject(d3dcompiler) == NULL) {
SDL_ClearError();
}
}
} else {
if (WIN_IsWindowsVistaOrGreater()) {
/* Try the newer d3d compilers first */
const char *d3dcompiler_list[] = {
"d3dcompiler_47.dll",
"d3dcompiler_46.dll",
};
int i;
for (i = 0; i < SDL_arraysize(d3dcompiler_list); ++i) {
if (SDL_LoadObject(d3dcompiler_list[i]) != NULL) {
break;
}
SDL_ClearError();
}
} else {
if (SDL_LoadObject("d3dcompiler_43.dll") == NULL) {
SDL_ClearError();
}
}
}
#endif
#if !defined(SDL_VIDEO_STATIC_ANGLE) && !defined(SDL_VIDEO_DRIVER_VITA)
/* A funny thing, loading EGL.so first does not work on the Raspberry, so we load libGL* first */
path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
if (path) {
opengl_dll_handle = SDL_LoadObject(path);
}
if (!opengl_dll_handle) {
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
if (_this->gl_config.major_version > 1) {
path = DEFAULT_OGL_ES2;
opengl_dll_handle = SDL_LoadObject(path);
#ifdef ALT_OGL_ES2
if (!opengl_dll_handle && !vc4) {
path = ALT_OGL_ES2;
opengl_dll_handle = SDL_LoadObject(path);
}
#endif
} else {
path = DEFAULT_OGL_ES;
opengl_dll_handle = SDL_LoadObject(path);
if (!opengl_dll_handle) {
path = DEFAULT_OGL_ES_PVR;
opengl_dll_handle = SDL_LoadObject(path);
}
#ifdef ALT_OGL_ES2
if (!opengl_dll_handle && !vc4) {
path = ALT_OGL_ES2;
opengl_dll_handle = SDL_LoadObject(path);
}
#endif
}
}
#ifdef DEFAULT_OGL
else {
path = DEFAULT_OGL;
opengl_dll_handle = SDL_LoadObject(path);
#ifdef ALT_OGL
if (!opengl_dll_handle) {
path = ALT_OGL;
opengl_dll_handle = SDL_LoadObject(path);
}
#endif
}
#endif
}
_this->egl_data->opengl_dll_handle = opengl_dll_handle;
if (!opengl_dll_handle) {
return SDL_SetError("Could not initialize OpenGL / GLES library");
}
/* Loading libGL* in the previous step took care of loading libEGL.so, but we future proof by double checking */
if (egl_path) {
egl_dll_handle = SDL_LoadObject(egl_path);
}
/* Try loading a EGL symbol, if it does not work try the default library paths */
if (!egl_dll_handle || SDL_LoadFunction(egl_dll_handle, "eglChooseConfig") == NULL) {
if (egl_dll_handle) {
SDL_UnloadObject(egl_dll_handle);
}
path = SDL_getenv("SDL_VIDEO_EGL_DRIVER");
if (!path) {
path = DEFAULT_EGL;
}
egl_dll_handle = SDL_LoadObject(path);
#ifdef ALT_EGL
if (!egl_dll_handle && !vc4) {
path = ALT_EGL;
egl_dll_handle = SDL_LoadObject(path);
}
#endif
if (!egl_dll_handle || SDL_LoadFunction(egl_dll_handle, "eglChooseConfig") == NULL) {
if (egl_dll_handle) {
SDL_UnloadObject(egl_dll_handle);
}
return SDL_SetError("Could not load EGL library");
}
SDL_ClearError();
}
#endif
_this->egl_data->egl_dll_handle = egl_dll_handle;
#ifdef SDL_VIDEO_DRIVER_VITA
_this->egl_data->opengl_dll_handle = opengl_dll_handle;
#endif
/* Load new function pointers */
LOAD_FUNC(eglGetDisplay);
LOAD_FUNC(eglInitialize);
LOAD_FUNC(eglTerminate);
LOAD_FUNC(eglGetProcAddress);
LOAD_FUNC(eglChooseConfig);
LOAD_FUNC(eglGetConfigAttrib);
LOAD_FUNC(eglCreateContext);
LOAD_FUNC(eglDestroyContext);
LOAD_FUNC(eglCreatePbufferSurface);
LOAD_FUNC(eglCreateWindowSurface);
LOAD_FUNC(eglDestroySurface);
LOAD_FUNC(eglMakeCurrent);
LOAD_FUNC(eglSwapBuffers);
LOAD_FUNC(eglSwapInterval);
LOAD_FUNC(eglWaitNative);
LOAD_FUNC(eglWaitGL);
LOAD_FUNC(eglBindAPI);
LOAD_FUNC(eglQueryAPI);
LOAD_FUNC(eglQueryString);
LOAD_FUNC(eglGetError);
LOAD_FUNC_EGLEXT(eglQueryDevicesEXT);
LOAD_FUNC_EGLEXT(eglGetPlatformDisplayEXT);
/* Atomic functions */
LOAD_FUNC_EGLEXT(eglCreateSyncKHR);
LOAD_FUNC_EGLEXT(eglDestroySyncKHR);
LOAD_FUNC_EGLEXT(eglDupNativeFenceFDANDROID);
LOAD_FUNC_EGLEXT(eglWaitSyncKHR);
LOAD_FUNC_EGLEXT(eglClientWaitSyncKHR);
/* Atomic functions end */
if (path) {
SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
} else {
*_this->gl_config.driver_path = '\0';
}
return 0;
}
int SDL_EGL_LoadLibraryOnly(_THIS, const char *egl_path)
{
if (_this->egl_data) {
return SDL_SetError("EGL context already created");
}
_this->egl_data = (struct SDL_EGL_VideoData *)SDL_calloc(1, sizeof(SDL_EGL_VideoData));
if (!_this->egl_data) {
return SDL_OutOfMemory();
}
if (SDL_EGL_LoadLibraryInternal(_this, egl_path) < 0) {
SDL_free(_this->egl_data);
_this->egl_data = NULL;
return -1;
}
return 0;
}
static void SDL_EGL_GetVersion(_THIS)
{
if (_this->egl_data->eglQueryString) {
const char *egl_version = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_VERSION);
if (egl_version) {
int major = 0, minor = 0;
if (SDL_sscanf(egl_version, "%d.%d", &major, &minor) == 2) {
_this->egl_data->egl_version_major = major;
_this->egl_data->egl_version_minor = minor;
} else {
SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not parse EGL version string: %s", egl_version);
}
}
}
}
int SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display, EGLenum platform)
{
int library_load_retcode = SDL_EGL_LoadLibraryOnly(_this, egl_path);
if (library_load_retcode != 0) {
return library_load_retcode;
}
_this->egl_data->egl_display = EGL_NO_DISPLAY;
#if !defined(__WINRT__)
#if !defined(SDL_VIDEO_DRIVER_VITA)
if (platform) {
/* EGL 1.5 allows querying for client version with EGL_NO_DISPLAY
* --
* Khronos doc: "EGL_BAD_DISPLAY is generated if display is not an EGL display connection, unless display is EGL_NO_DISPLAY and name is EGL_EXTENSIONS."
* Therefore SDL_EGL_GetVersion() shouldn't work with uninitialized display.
* - it actually doesn't work on Android that has 1.5 egl client
* - it works on desktop X11 (using SDL_VIDEO_X11_FORCE_EGL=1) */
SDL_EGL_GetVersion(_this);
if (_this->egl_data->egl_version_major == 1 && _this->egl_data->egl_version_minor == 5) {
LOAD_FUNC(eglGetPlatformDisplay);
}
if (_this->egl_data->eglGetPlatformDisplay) {
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplay(platform, (void *)(uintptr_t)native_display, NULL);
} else {
if (SDL_EGL_HasExtension(_this, SDL_EGL_CLIENT_EXTENSION, "EGL_EXT_platform_base")) {
_this->egl_data->eglGetPlatformDisplayEXT = SDL_EGL_GetProcAddress(_this, "eglGetPlatformDisplayEXT");
if (_this->egl_data->eglGetPlatformDisplayEXT) {
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(platform, (void *)(uintptr_t)native_display, NULL);
}
}
}
}
#endif
/* Try the implementation-specific eglGetDisplay even if eglGetPlatformDisplay fails */
if ((_this->egl_data->egl_display == EGL_NO_DISPLAY) && (_this->egl_data->eglGetDisplay)) {
_this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display);
}
if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
_this->gl_config.driver_loaded = 0;
*_this->gl_config.driver_path = '\0';
return SDL_SetError("Could not get EGL display");
}
if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
_this->gl_config.driver_loaded = 0;
*_this->gl_config.driver_path = '\0';
return SDL_SetError("Could not initialize EGL");
}
#endif
/* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
SDL_EGL_GetVersion(_this);
_this->egl_data->is_offscreen = SDL_FALSE;
return 0;
}
/**
On multi GPU machines EGL device 0 is not always the first valid GPU.
Container environments can restrict access to some GPUs that are still listed in the EGL
device list. If the requested device is a restricted GPU and cannot be used
(eglInitialize() will fail) then attempt to automatically and silently select the next
valid available GPU for EGL to use.
*/
int SDL_EGL_InitializeOffscreen(_THIS, int device)
{
void *egl_devices[SDL_EGL_MAX_DEVICES];
EGLint num_egl_devices = 0;
const char *egl_device_hint;
if (_this->gl_config.driver_loaded <= 0) {
return SDL_SetError("SDL_EGL_LoadLibraryOnly() has not been called or has failed.");
}
/* Check for all extensions that are optional until used and fail if any is missing */
if (!_this->egl_data->eglQueryDevicesEXT) {
return SDL_SetError("eglQueryDevicesEXT is missing (EXT_device_enumeration not supported by the drivers?)");
}
if (!_this->egl_data->eglGetPlatformDisplayEXT) {
return SDL_SetError("eglGetPlatformDisplayEXT is missing (EXT_platform_base not supported by the drivers?)");
}
if (_this->egl_data->eglQueryDevicesEXT(SDL_EGL_MAX_DEVICES, egl_devices, &num_egl_devices) != EGL_TRUE) {
return SDL_SetError("eglQueryDevicesEXT() failed");
}
egl_device_hint = SDL_GetHint("SDL_HINT_EGL_DEVICE");
if (egl_device_hint) {
device = SDL_atoi(egl_device_hint);
if (device >= num_egl_devices) {
return SDL_SetError("Invalid EGL device is requested.");
}
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[device], NULL);
if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
return SDL_SetError("eglGetPlatformDisplayEXT() failed.");
}
if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
return SDL_SetError("Could not initialize EGL");
}
} else {
int i;
SDL_bool found = SDL_FALSE;
EGLDisplay attempted_egl_display;
/* If no hint is provided lets look for the first device/display that will allow us to eglInit */
for (i = 0; i < num_egl_devices; i++) {
attempted_egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[i], NULL);
if (attempted_egl_display == EGL_NO_DISPLAY) {
continue;
}
if (_this->egl_data->eglInitialize(attempted_egl_display, NULL, NULL) != EGL_TRUE) {
_this->egl_data->eglTerminate(attempted_egl_display);
continue;
}
/* We did not fail, we'll pick this one! */
_this->egl_data->egl_display = attempted_egl_display;
found = SDL_TRUE;
break;
}
if (!found) {
return SDL_SetError("Could not find a valid EGL device to initialize");
}
}
/* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
SDL_EGL_GetVersion(_this);
_this->egl_data->is_offscreen = SDL_TRUE;
return 0;
}
void SDL_EGL_SetRequiredVisualId(_THIS, int visual_id)
{
_this->egl_data->egl_required_visual_id = visual_id;
}
#ifdef DUMP_EGL_CONFIG
#define ATTRIBUTE(_attr) \
{ \
_attr, #_attr \
}
typedef struct
{
EGLint attribute;
char const *name;
} Attribute;
static Attribute all_attributes[] = {
ATTRIBUTE(EGL_BUFFER_SIZE),
ATTRIBUTE(EGL_ALPHA_SIZE),
ATTRIBUTE(EGL_BLUE_SIZE),
ATTRIBUTE(EGL_GREEN_SIZE),
ATTRIBUTE(EGL_RED_SIZE),
ATTRIBUTE(EGL_DEPTH_SIZE),
ATTRIBUTE(EGL_STENCIL_SIZE),
ATTRIBUTE(EGL_CONFIG_CAVEAT),
ATTRIBUTE(EGL_CONFIG_ID),
ATTRIBUTE(EGL_LEVEL),
ATTRIBUTE(EGL_MAX_PBUFFER_HEIGHT),
ATTRIBUTE(EGL_MAX_PBUFFER_WIDTH),
ATTRIBUTE(EGL_MAX_PBUFFER_PIXELS),
ATTRIBUTE(EGL_NATIVE_RENDERABLE),
ATTRIBUTE(EGL_NATIVE_VISUAL_ID),
ATTRIBUTE(EGL_NATIVE_VISUAL_TYPE),
ATTRIBUTE(EGL_SAMPLES),
ATTRIBUTE(EGL_SAMPLE_BUFFERS),
ATTRIBUTE(EGL_SURFACE_TYPE),
ATTRIBUTE(EGL_TRANSPARENT_TYPE),
ATTRIBUTE(EGL_TRANSPARENT_BLUE_VALUE),
ATTRIBUTE(EGL_TRANSPARENT_GREEN_VALUE),
ATTRIBUTE(EGL_TRANSPARENT_RED_VALUE),
ATTRIBUTE(EGL_BIND_TO_TEXTURE_RGB),
ATTRIBUTE(EGL_BIND_TO_TEXTURE_RGBA),
ATTRIBUTE(EGL_MIN_SWAP_INTERVAL),
ATTRIBUTE(EGL_MAX_SWAP_INTERVAL),
ATTRIBUTE(EGL_LUMINANCE_SIZE),
ATTRIBUTE(EGL_ALPHA_MASK_SIZE),
ATTRIBUTE(EGL_COLOR_BUFFER_TYPE),
ATTRIBUTE(EGL_RENDERABLE_TYPE),
ATTRIBUTE(EGL_MATCH_NATIVE_PIXMAP),
ATTRIBUTE(EGL_CONFORMANT),
};
static void dumpconfig(_THIS, EGLConfig config)
{
int attr;
for (attr = 0; attr < sizeof(all_attributes) / sizeof(Attribute); attr++) {
EGLint value;
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, config, all_attributes[attr].attribute, &value);
SDL_Log("\t%-32s: %10d (0x%08x)\n", all_attributes[attr].name, value, value);
}
}
#endif /* DUMP_EGL_CONFIG */
static int SDL_EGL_PrivateChooseConfig(_THIS, SDL_bool set_config_caveat_none)
{
/* 64 seems nice. */
EGLint attribs[64];
EGLint found_configs = 0, value;
/* 128 seems even nicer here */
EGLConfig configs[128];
SDL_bool has_matching_format = SDL_FALSE;
int i, j, best_bitdiff = -1, best_truecolor_bitdiff = -1;
int truecolor_config_idx = -1;
/* Get a valid EGL configuration */
i = 0;
attribs[i++] = EGL_RED_SIZE;
attribs[i++] = _this->gl_config.red_size;
attribs[i++] = EGL_GREEN_SIZE;
attribs[i++] = _this->gl_config.green_size;
attribs[i++] = EGL_BLUE_SIZE;
attribs[i++] = _this->gl_config.blue_size;
if (set_config_caveat_none) {
attribs[i++] = EGL_CONFIG_CAVEAT;
attribs[i++] = EGL_NONE;
}
if (_this->gl_config.alpha_size) {
attribs[i++] = EGL_ALPHA_SIZE;
attribs[i++] = _this->gl_config.alpha_size;
}
if (_this->gl_config.buffer_size) {
attribs[i++] = EGL_BUFFER_SIZE;
attribs[i++] = _this->gl_config.buffer_size;
}
if (_this->gl_config.depth_size) {
attribs[i++] = EGL_DEPTH_SIZE;
attribs[i++] = _this->gl_config.depth_size;
}
if (_this->gl_config.stencil_size) {
attribs[i++] = EGL_STENCIL_SIZE;
attribs[i++] = _this->gl_config.stencil_size;
}
if (_this->gl_config.multisamplebuffers) {
attribs[i++] = EGL_SAMPLE_BUFFERS;
attribs[i++] = _this->gl_config.multisamplebuffers;
}
if (_this->gl_config.multisamplesamples) {
attribs[i++] = EGL_SAMPLES;
attribs[i++] = _this->gl_config.multisamplesamples;
}
if (_this->gl_config.floatbuffers) {
attribs[i++] = EGL_COLOR_COMPONENT_TYPE_EXT;
attribs[i++] = EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT;
}
if (_this->egl_data->is_offscreen) {
attribs[i++] = EGL_SURFACE_TYPE;
attribs[i++] = EGL_PBUFFER_BIT;
}
attribs[i++] = EGL_RENDERABLE_TYPE;
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
#ifdef EGL_KHR_create_context
if (_this->gl_config.major_version >= 3 &&
SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
attribs[i++] = EGL_OPENGL_ES3_BIT_KHR;
} else
#endif
if (_this->gl_config.major_version >= 2) {
attribs[i++] = EGL_OPENGL_ES2_BIT;
} else {
attribs[i++] = EGL_OPENGL_ES_BIT;
}
_this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
} else {
attribs[i++] = EGL_OPENGL_BIT;
_this->egl_data->eglBindAPI(EGL_OPENGL_API);
}
if (_this->egl_data->egl_surfacetype) {
attribs[i++] = EGL_SURFACE_TYPE;
attribs[i++] = _this->egl_data->egl_surfacetype;
}
attribs[i++] = EGL_NONE;
SDL_assert(i < SDL_arraysize(attribs));
if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display,
attribs,
configs, SDL_arraysize(configs),
&found_configs) == EGL_FALSE ||
found_configs == 0) {
return -1;
}
/* first ensure that a found config has a matching format, or the function will fall through. */
if (_this->egl_data->egl_required_visual_id) {
for (i = 0; i < found_configs; i++) {
EGLint format;
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
configs[i],
EGL_NATIVE_VISUAL_ID, &format);
if (_this->egl_data->egl_required_visual_id == format) {
has_matching_format = SDL_TRUE;
break;
}
}
}
/* eglChooseConfig returns a number of configurations that match or exceed the requested attribs. */
/* From those, we select the one that matches our requirements more closely via a makeshift algorithm */
for (i = 0; i < found_configs; i++) {
SDL_bool is_truecolor = SDL_FALSE;
int bitdiff = 0;
if (has_matching_format && _this->egl_data->egl_required_visual_id) {
EGLint format;
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
configs[i],
EGL_NATIVE_VISUAL_ID, &format);
if (_this->egl_data->egl_required_visual_id != format) {
continue;
}
}
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], EGL_RED_SIZE, &value);
if (value == 8) {
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], EGL_GREEN_SIZE, &value);
if (value == 8) {
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], EGL_BLUE_SIZE, &value);
if (value == 8) {
is_truecolor = SDL_TRUE;
}
}
}
for (j = 0; j < SDL_arraysize(attribs) - 1; j += 2) {
if (attribs[j] == EGL_NONE) {
break;
}
if (attribs[j + 1] != EGL_DONT_CARE && (attribs[j] == EGL_RED_SIZE ||
attribs[j] == EGL_GREEN_SIZE ||
attribs[j] == EGL_BLUE_SIZE ||
attribs[j] == EGL_ALPHA_SIZE ||
attribs[j] == EGL_DEPTH_SIZE ||
attribs[j] == EGL_STENCIL_SIZE)) {
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], attribs[j], &value);
bitdiff += value - attribs[j + 1]; /* value is always >= attrib */
}
}
if ((bitdiff < best_bitdiff) || (best_bitdiff == -1)) {
_this->egl_data->egl_config = configs[i];
best_bitdiff = bitdiff;
}
if (is_truecolor && ((bitdiff < best_truecolor_bitdiff) || (best_truecolor_bitdiff == -1))) {
truecolor_config_idx = i;
best_truecolor_bitdiff = bitdiff;
}
}
#define FAVOR_TRUECOLOR 1
#if FAVOR_TRUECOLOR
/* Some apps request a low color depth, either because they _assume_
they'll get a larger one but don't want to fail if only smaller ones
are available, or they just never called SDL_GL_SetAttribute at all and
got a tiny default. For these cases, a game that would otherwise run
at 24-bit color might get dithered down to something smaller, which is
worth avoiding. If the app requested <= 16 bit color and an exact 24-bit
match is available, favor that. Otherwise, we look for the closest
match. Note that while the API promises what you request _or better_,
it's feasible this can be disastrous for performance for custom software
on small hardware that all expected to actually get 16-bit color. In this
case, turn off FAVOR_TRUECOLOR (and maybe send a patch to make this more
flexible). */
if (((_this->gl_config.red_size + _this->gl_config.blue_size + _this->gl_config.green_size) <= 16)) {
if (truecolor_config_idx != -1) {
_this->egl_data->egl_config = configs[truecolor_config_idx];
}
}
#endif
#ifdef DUMP_EGL_CONFIG
dumpconfig(_this, _this->egl_data->egl_config);
#endif
return 0;
}
int SDL_EGL_ChooseConfig(_THIS)
{
int ret;
if (!_this->egl_data) {
return SDL_SetError("EGL not initialized");
}
/* Try with EGL_CONFIG_CAVEAT set to EGL_NONE, to avoid any EGL_SLOW_CONFIG or EGL_NON_CONFORMANT_CONFIG */
ret = SDL_EGL_PrivateChooseConfig(_this, SDL_TRUE);
if (ret == 0) {
return 0;
}
/* Fallback with all configs */
ret = SDL_EGL_PrivateChooseConfig(_this, SDL_FALSE);
if (ret == 0) {
SDL_Log("SDL_EGL_ChooseConfig: found a slow EGL config");
return 0;
}
return SDL_EGL_SetError("Couldn't find matching EGL config", "eglChooseConfig");
}
SDL_GLContext SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface)
{
/* max 14 values plus terminator. */
EGLint attribs[15];
int attr = 0;
EGLContext egl_context, share_context = EGL_NO_CONTEXT;
EGLint profile_mask = _this->gl_config.profile_mask;
EGLint major_version = _this->gl_config.major_version;
EGLint minor_version = _this->gl_config.minor_version;
SDL_bool profile_es = (profile_mask == SDL_GL_CONTEXT_PROFILE_ES);
if (!_this->egl_data) {
SDL_SetError("EGL not initialized");
return NULL;
}
if (_this->gl_config.share_with_current_context) {
share_context = (EGLContext)SDL_GL_GetCurrentContext();
}
#ifdef SDL_VIDEO_DRIVER_ANDROID
if (_this->gl_config.flags & SDL_GL_CONTEXT_DEBUG_FLAG) {
/* If SDL_GL_CONTEXT_DEBUG_FLAG is set but EGL_KHR_debug unsupported, unset.
* This is required because some Android devices like to complain about it
* by "silently" failing, logging a hint which could be easily overlooked:
* E/libEGL (26984): validate_display:255 error 3008 (EGL_BAD_DISPLAY)
* The following explicitly checks for EGL_KHR_debug before EGL 1.5
*/
int egl_version_major = _this->egl_data->egl_version_major;
int egl_version_minor = _this->egl_data->egl_version_minor;
if (((egl_version_major < 1) || (egl_version_major == 1 && egl_version_minor < 5)) &&
!SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_debug")) {
/* SDL profile bits match EGL profile bits. */
_this->gl_config.flags &= ~SDL_GL_CONTEXT_DEBUG_FLAG;
}
}
#endif
/* Set the context version and other attributes. */
if ((major_version < 3 || (minor_version == 0 && profile_es)) &&
_this->gl_config.flags == 0 &&
(profile_mask == 0 || profile_es)) {
/* Create a context without using EGL_KHR_create_context attribs.
* When creating a GLES context without EGL_KHR_create_context we can
* only specify the major version. When creating a desktop GL context
* we can't specify any version, so we only try in that case when the
* version is less than 3.0 (matches SDL's GLX/WGL behavior.)
*/
if (profile_es) {
attribs[attr++] = EGL_CONTEXT_CLIENT_VERSION;
attribs[attr++] = SDL_max(major_version, 1);
}
} else {
#ifdef EGL_KHR_create_context
/* The Major/minor version, context profiles, and context flags can
* only be specified when this extension is available.
*/
if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
attribs[attr++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
attribs[attr++] = major_version;
attribs[attr++] = EGL_CONTEXT_MINOR_VERSION_KHR;
attribs[attr++] = minor_version;
/* SDL profile bits match EGL profile bits. */