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Diffstat (limited to 'source/3rd-party/SDL2/src/video/SDL_egl.c')
-rw-r--r--source/3rd-party/SDL2/src/video/SDL_egl.c920
1 files changed, 920 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/video/SDL_egl.c b/source/3rd-party/SDL2/src/video/SDL_egl.c
new file mode 100644
index 0000000..78abc03
--- /dev/null
+++ b/source/3rd-party/SDL2/src/video/SDL_egl.c
@@ -0,0 +1,920 @@
+/*
+ * Simple DirectMedia Layer
+ * Copyright (C) 1997-2018 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"
+
+#if SDL_VIDEO_OPENGL_EGL
+
+#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
+#include "../core/windows/SDL_windows.h"
+#endif
+#if SDL_VIDEO_DRIVER_ANDROID
+#include <android/native_window.h>
+#endif
+
+#include "SDL_sysvideo.h"
+#include "SDL_log.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 */
+
+#if 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 SDL_VIDEO_DRIVER_ANDROID || 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 SDL_VIDEO_DRIVER_WINDOWS || 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 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" //???
+
+#else
+/* Desktop Linux */
+#define DEFAULT_OGL "libGL.so.1"
+#define DEFAULT_EGL "libEGL.so.1"
+#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 */
+
+#ifdef SDL_VIDEO_STATIC_ANGLE
+#define LOAD_FUNC(NAME) \
+_this->egl_data->NAME = (void *)NAME;
+#else
+#define LOAD_FUNC(NAME) \
+_this->egl_data->NAME = SDL_LoadFunction(_this->egl_data->dll_handle, #NAME); \
+if (!_this->egl_data->NAME) \
+{ \
+ return SDL_SetError("Could not retrieve EGL function " #NAME); \
+}
+#endif
+
+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. */
+ 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 */
+typedef enum {
+ SDL_EGL_DISPLAY_EXTENSION,
+ SDL_EGL_CLIENT_EXTENSION
+} SDL_EGL_ExtensionType;
+
+static 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 == NULL || *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 != NULL) {
+ 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 != NULL) {
+ ext_start = egl_extstr;
+
+ while (*ext_start) {
+ ext_start = SDL_strstr(ext_start, ext);
+ if (ext_start == NULL) {
+ 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)
+{
+ static char procname[1024];
+ void *retval;
+
+ /* eglGetProcAddress is busted on Android http://code.google.com/p/android/issues/detail?id=7681 */
+#if !defined(SDL_VIDEO_DRIVER_ANDROID)
+ if (_this->egl_data->eglGetProcAddress) {
+ retval = _this->egl_data->eglGetProcAddress(proc);
+ if (retval) {
+ return retval;
+ }
+ }
+#endif
+
+ retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, proc);
+ if (!retval && SDL_strlen(proc) <= 1022) {
+ procname[0] = '_';
+ SDL_strlcpy(procname + 1, proc, 1022);
+ retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, procname);
+ }
+ 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->dll_handle) {
+ SDL_UnloadObject(_this->egl_data->dll_handle);
+ _this->egl_data->dll_handle = NULL;
+ }
+ if (_this->egl_data->egl_dll_handle) {
+ SDL_UnloadObject(_this->egl_data->egl_dll_handle);
+ _this->egl_data->egl_dll_handle = NULL;
+ }
+
+ SDL_free(_this->egl_data);
+ _this->egl_data = NULL;
+ }
+}
+
+int
+SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display, EGLenum platform)
+{
+ void *dll_handle = NULL, *egl_dll_handle = NULL; /* The naming is counter intuitive, but hey, I just work here -- Gabriel */
+ const char *path = NULL;
+ int egl_version_major = 0, egl_version_minor = 0;
+#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
+ const char *d3dcompiler;
+#endif
+#if SDL_VIDEO_DRIVER_RPI
+ SDL_bool vc4 = (0 == access("/sys/module/vc4/", F_OK));
+#endif
+
+ 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_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
+ d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER);
+ if (!d3dcompiler) {
+ if (WIN_IsWindowsVistaOrGreater()) {
+ d3dcompiler = "d3dcompiler_46.dll";
+ } else {
+ d3dcompiler = "d3dcompiler_43.dll";
+ }
+ }
+ if (SDL_strcasecmp(d3dcompiler, "none") != 0) {
+ if (SDL_LoadObject(d3dcompiler) == NULL) {
+ SDL_ClearError();
+ }
+ }
+#endif
+
+#ifndef SDL_VIDEO_STATIC_ANGLE
+ /* 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 != NULL) {
+ egl_dll_handle = SDL_LoadObject(path);
+ }
+
+ if (egl_dll_handle == NULL) {
+ if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
+ if (_this->gl_config.major_version > 1) {
+ path = DEFAULT_OGL_ES2;
+ egl_dll_handle = SDL_LoadObject(path);
+#ifdef ALT_OGL_ES2
+ if (egl_dll_handle == NULL && !vc4) {
+ path = ALT_OGL_ES2;
+ egl_dll_handle = SDL_LoadObject(path);
+ }
+#endif
+
+ } else {
+ path = DEFAULT_OGL_ES;
+ egl_dll_handle = SDL_LoadObject(path);
+ if (egl_dll_handle == NULL) {
+ path = DEFAULT_OGL_ES_PVR;
+ egl_dll_handle = SDL_LoadObject(path);
+ }
+#ifdef ALT_OGL_ES2
+ if (egl_dll_handle == NULL && !vc4) {
+ path = ALT_OGL_ES2;
+ egl_dll_handle = SDL_LoadObject(path);
+ }
+#endif
+ }
+ }
+#ifdef DEFAULT_OGL
+ else {
+ path = DEFAULT_OGL;
+ egl_dll_handle = SDL_LoadObject(path);
+ }
+#endif
+ }
+ _this->egl_data->egl_dll_handle = egl_dll_handle;
+
+ if (egl_dll_handle == NULL) {
+ 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 != NULL) {
+ dll_handle = SDL_LoadObject(egl_path);
+ }
+ /* Try loading a EGL symbol, if it does not work try the default library paths */
+ if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
+ if (dll_handle != NULL) {
+ SDL_UnloadObject(dll_handle);
+ }
+ path = SDL_getenv("SDL_VIDEO_EGL_DRIVER");
+ if (path == NULL) {
+ path = DEFAULT_EGL;
+ }
+ dll_handle = SDL_LoadObject(path);
+
+#ifdef ALT_EGL
+ if (dll_handle == NULL && !vc4) {
+ path = ALT_EGL;
+ dll_handle = SDL_LoadObject(path);
+ }
+#endif
+
+ if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
+ if (dll_handle != NULL) {
+ SDL_UnloadObject(dll_handle);
+ }
+ return SDL_SetError("Could not load EGL library");
+ }
+ SDL_ClearError();
+ }
+#endif
+
+ _this->egl_data->dll_handle = dll_handle;
+
+ /* 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(eglQueryString);
+ LOAD_FUNC(eglGetError);
+
+ if (_this->egl_data->eglQueryString) {
+ /* EGL 1.5 allows querying for client version */
+ const char *egl_version = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_VERSION);
+ if (egl_version != NULL) {
+ if (SDL_sscanf(egl_version, "%d.%d", &egl_version_major, &egl_version_minor) != 2) {
+ egl_version_major = 0;
+ egl_version_minor = 0;
+ SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not parse EGL version string: %s", egl_version);
+ }
+ }
+ }
+
+ _this->egl_data->egl_version_major = egl_version_major;
+ _this->egl_data->egl_version_minor = egl_version_minor;
+
+ if (egl_version_major == 1 && egl_version_minor == 5) {
+ LOAD_FUNC(eglGetPlatformDisplay);
+ }
+
+ _this->egl_data->egl_display = EGL_NO_DISPLAY;
+#if !defined(__WINRT__)
+ if (platform) {
+ if (egl_version_major == 1 && egl_version_minor == 5) {
+ _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplay(platform, (void *)(size_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 *)(size_t)native_display, NULL);
+ }
+ }
+ }
+ }
+ /* Try the implementation-specific eglGetDisplay even if eglGetPlatformDisplay fails */
+ if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
+ _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display);
+ }
+ if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
+ return SDL_SetError("Could not get EGL display");
+ }
+
+ if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
+ return SDL_SetError("Could not initialize EGL");
+ }
+#endif
+
+ 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;
+}
+
+#ifdef DUMP_EGL_CONFIG
+
+#define ATTRIBUTE(_attr) { _attr, #_attr }
+
+typedef struct {
+ EGLint attribute;
+ char const* name;
+} Attribute;
+
+Attribute 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(attributes)/sizeof(Attribute) ; attr++) {
+ EGLint value;
+ _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, config, attributes[attr].attribute, &value);
+ SDL_Log("\t%-32s: %10d (0x%08x)\n", attributes[attr].name, value, value);
+ }
+}
+
+#endif /* DUMP_EGL_CONFIG */
+
+int
+SDL_EGL_ChooseConfig(_THIS)
+{
+/* 64 seems nice. */
+ EGLint attribs[64];
+ EGLint found_configs = 0, value;
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
+ /* Intel EGL on KMS/DRM (al least) returns invalid configs that confuse the bitdiff search used */
+ /* later in this function, so we simply use the first one when using the KMSDRM driver for now. */
+ EGLConfig configs[1];
+#else
+ /* 128 seems even nicer here */
+ EGLConfig configs[128];
+#endif
+ int i, j, best_bitdiff = -1, bitdiff;
+
+ if (!_this->egl_data) {
+ /* The EGL library wasn't loaded, SDL_GetError() should have info */
+ return -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 (_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;
+ }
+
+ 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;
+ }
+
+ 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;
+
+ if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display,
+ attribs,
+ configs, SDL_arraysize(configs),
+ &found_configs) == EGL_FALSE ||
+ found_configs == 0) {
+ return SDL_EGL_SetError("Couldn't find matching EGL config", "eglChooseConfig");
+ }
+
+ /* 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++ ) {
+ bitdiff = 0;
+ 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 (bitdiff == 0) {
+ break; /* we found an exact match! */
+ }
+ }
+
+#ifdef DUMP_EGL_CONFIG
+ dumpconfig(_this, _this->egl_data->egl_config);
+#endif
+
+ return 0;
+}
+
+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) {
+ /* The EGL library wasn't loaded, SDL_GetError() should have info */
+ return NULL;
+ }
+
+ if (_this->gl_config.share_with_current_context) {
+ share_context = (EGLContext)SDL_GL_GetCurrentContext();
+ }
+
+#if SDL_VIDEO_DRIVER_ANDROID
+ if ((_this->gl_config.flags & SDL_GL_CONTEXT_DEBUG_FLAG) != 0) {
+ /* 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. */
+ if (profile_mask != 0 && profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
+ attribs[attr++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
+ attribs[attr++] = profile_mask;
+ }
+
+ /* SDL flags match EGL flags. */
+ if (_this->gl_config.flags != 0) {
+ attribs[attr++] = EGL_CONTEXT_FLAGS_KHR;
+ attribs[attr++] = _this->gl_config.flags;
+ }
+ } else
+#endif /* EGL_KHR_create_context */
+ {
+ SDL_SetError("Could not create EGL context (context attributes are not supported)");
+ return NULL;
+ }
+ }
+
+ if (_this->gl_config.no_error) {
+#ifdef EGL_KHR_create_context_no_error
+ if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context_no_error")) {
+ attribs[attr++] = EGL_CONTEXT_OPENGL_NO_ERROR_KHR;
+ attribs[attr++] = _this->gl_config.no_error;
+ } else
+#endif
+ {
+ SDL_SetError("EGL implementation does not support no_error contexts");
+ return NULL;
+ }
+ }
+
+ attribs[attr++] = EGL_NONE;
+
+ /* Bind the API */
+ if (profile_es) {
+ _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
+ } else {
+ _this->egl_data->eglBindAPI(EGL_OPENGL_API);
+ }
+
+ egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display,
+ _this->egl_data->egl_config,
+ share_context, attribs);
+
+ if (egl_context == EGL_NO_CONTEXT) {
+ SDL_EGL_SetError("Could not create EGL context", "eglCreateContext");
+ return NULL;
+ }
+
+ _this->egl_data->egl_swapinterval = 0;
+
+ if (SDL_EGL_MakeCurrent(_this, egl_surface, egl_context) < 0) {
+ /* Save the SDL error set by SDL_EGL_MakeCurrent */
+ char errorText[1024];
+ SDL_strlcpy(errorText, SDL_GetError(), SDL_arraysize(errorText));
+
+ /* Delete the context, which may alter the value returned by SDL_GetError() */
+ SDL_EGL_DeleteContext(_this, egl_context);
+
+ /* Restore the SDL error */
+ SDL_SetError("%s", errorText);
+
+ return NULL;
+ }
+
+ return (SDL_GLContext) egl_context;
+}
+
+int
+SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context)
+{
+ EGLContext egl_context = (EGLContext) context;
+
+ if (!_this->egl_data) {
+ return SDL_SetError("OpenGL not initialized");
+ }
+
+ /* The android emulator crashes badly if you try to eglMakeCurrent
+ * with a valid context and invalid surface, so we have to check for both here.
+ */
+ if (!egl_context || !egl_surface) {
+ _this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ } else {
+ if (!_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display,
+ egl_surface, egl_surface, egl_context)) {
+ return SDL_EGL_SetError("Unable to make EGL context current", "eglMakeCurrent");
+ }
+ }
+
+ return 0;
+}
+
+int
+SDL_EGL_SetSwapInterval(_THIS, int interval)
+{
+ EGLBoolean status;
+
+ if (!_this->egl_data) {
+ return SDL_SetError("EGL not initialized");
+ }
+
+ status = _this->egl_data->eglSwapInterval(_this->egl_data->egl_display, interval);
+ if (status == EGL_TRUE) {
+ _this->egl_data->egl_swapinterval = interval;
+ return 0;
+ }
+
+ return SDL_EGL_SetError("Unable to set the EGL swap interval", "eglSwapInterval");
+}
+
+int
+SDL_EGL_GetSwapInterval(_THIS)
+{
+ if (!_this->egl_data) {
+ SDL_SetError("EGL not initialized");
+ return 0;
+ }
+
+ return _this->egl_data->egl_swapinterval;
+}
+
+int
+SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface)
+{
+ if (!_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, egl_surface)) {
+ return SDL_EGL_SetError("unable to show color buffer in an OS-native window", "eglSwapBuffers");
+ }
+ return 0;
+}
+
+void
+SDL_EGL_DeleteContext(_THIS, SDL_GLContext context)
+{
+ EGLContext egl_context = (EGLContext) context;
+
+ /* Clean up GLES and EGL */
+ if (!_this->egl_data) {
+ return;
+ }
+
+ if (egl_context != NULL && egl_context != EGL_NO_CONTEXT) {
+ _this->egl_data->eglDestroyContext(_this->egl_data->egl_display, egl_context);
+ }
+
+}
+
+EGLSurface *
+SDL_EGL_CreateSurface(_THIS, NativeWindowType nw)
+{
+ /* max 2 values plus terminator. */
+ EGLint attribs[3];
+ int attr = 0;
+
+ EGLSurface * surface;
+
+ if (SDL_EGL_ChooseConfig(_this) != 0) {
+ return EGL_NO_SURFACE;
+ }
+
+#if SDL_VIDEO_DRIVER_ANDROID
+ {
+ /* Android docs recommend doing this!
+ * Ref: http://developer.android.com/reference/android/app/NativeActivity.html
+ */
+ EGLint format;
+ _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
+ _this->egl_data->egl_config,
+ EGL_NATIVE_VISUAL_ID, &format);
+
+ ANativeWindow_setBuffersGeometry(nw, 0, 0, format);
+ }
+#endif
+ if (_this->gl_config.framebuffer_srgb_capable) {
+#ifdef EGL_KHR_gl_colorspace
+ if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_gl_colorspace")) {
+ attribs[attr++] = EGL_GL_COLORSPACE_KHR;
+ attribs[attr++] = EGL_GL_COLORSPACE_SRGB_KHR;
+ } else
+#endif
+ {
+ SDL_SetError("EGL implementation does not support sRGB system framebuffers");
+ return EGL_NO_SURFACE;
+ }
+ }
+
+ attribs[attr++] = EGL_NONE;
+
+ surface = _this->egl_data->eglCreateWindowSurface(
+ _this->egl_data->egl_display,
+ _this->egl_data->egl_config,
+ nw, &attribs[0]);
+ if (surface == EGL_NO_SURFACE) {
+ SDL_EGL_SetError("unable to create an EGL window surface", "eglCreateWindowSurface");
+ }
+ return surface;
+}
+
+void
+SDL_EGL_DestroySurface(_THIS, EGLSurface egl_surface)
+{
+ if (!_this->egl_data) {
+ return;
+ }
+
+ if (egl_surface != EGL_NO_SURFACE) {
+ _this->egl_data->eglDestroySurface(_this->egl_data->egl_display, egl_surface);
+ }
+}
+
+#endif /* SDL_VIDEO_OPENGL_EGL */
+
+/* vi: set ts=4 sw=4 expandtab: */
+