src/video/SDL_egl.c
author Philipp Wiesemann <philipp.wiesemann@arcor.de>
Sat, 05 Aug 2017 22:10:55 +0200
changeset 11192 3c8377f1a323
parent 11175 cbc6a8a5b701
child 11219 f94279990934
permissions -rw-r--r--
emscripten: Fixed compiler warnings about integer to pointer conversions.

Found by buildbot.
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/*
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 *  Simple DirectMedia Layer
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 *  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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 * 
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 *  This software is provided 'as-is', without any express or implied
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 *  warranty.  In no event will the authors be held liable for any damages
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 *  arising from the use of this software.
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 * 
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 *  Permission is granted to anyone to use this software for any purpose,
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 *  including commercial applications, and to alter it and redistribute it
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 *  freely, subject to the following restrictions:
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 * 
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 *  1. The origin of this software must not be misrepresented; you must not
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 *     claim that you wrote the original software. If you use this software
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 *     in a product, an acknowledgment in the product documentation would be
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 *     appreciated but is not required.
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 *  2. Altered source versions must be plainly marked as such, and must not be
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 *     misrepresented as being the original software.
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 *  3. This notice may not be removed or altered from any source distribution.
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 */
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#include "../SDL_internal.h"
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#if SDL_VIDEO_OPENGL_EGL
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#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
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#include "../core/windows/SDL_windows.h"
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#endif
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#if SDL_VIDEO_DRIVER_ANDROID
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#include <android/native_window.h>
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#endif
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#include "SDL_sysvideo.h"
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#include "SDL_log.h"
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#include "SDL_egl_c.h"
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#include "SDL_loadso.h"
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#include "SDL_hints.h"
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#ifdef EGL_KHR_create_context
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/* EGL_OPENGL_ES3_BIT_KHR was added in version 13 of the extension. */
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#ifndef EGL_OPENGL_ES3_BIT_KHR
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#define EGL_OPENGL_ES3_BIT_KHR 0x00000040
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#endif
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#endif /* EGL_KHR_create_context */
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#if SDL_VIDEO_DRIVER_RPI
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/* Raspbian places the OpenGL ES/EGL binaries in a non standard path */
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#define DEFAULT_EGL "/opt/vc/lib/libEGL.so"
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#define DEFAULT_OGL_ES2 "/opt/vc/lib/libGLESv2.so"
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#define DEFAULT_OGL_ES_PVR "/opt/vc/lib/libGLES_CM.so"
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#define DEFAULT_OGL_ES "/opt/vc/lib/libGLESv1_CM.so"
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#elif SDL_VIDEO_DRIVER_ANDROID || SDL_VIDEO_DRIVER_VIVANTE
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/* Android */
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#define DEFAULT_EGL "libEGL.so"
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#define DEFAULT_OGL_ES2 "libGLESv2.so"
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#define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
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#define DEFAULT_OGL_ES "libGLESv1_CM.so"
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#elif SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
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/* EGL AND OpenGL ES support via ANGLE */
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#define DEFAULT_EGL "libEGL.dll"
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#define DEFAULT_OGL_ES2 "libGLESv2.dll"
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#define DEFAULT_OGL_ES_PVR "libGLES_CM.dll"
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#define DEFAULT_OGL_ES "libGLESv1_CM.dll"
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#else
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/* Desktop Linux */
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#define DEFAULT_OGL "libGL.so.1"
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#define DEFAULT_EGL "libEGL.so.1"
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#define DEFAULT_OGL_ES2 "libGLESv2.so.2"
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#define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1"
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#define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
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#endif /* SDL_VIDEO_DRIVER_RPI */
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#define LOAD_FUNC(NAME) \
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_this->egl_data->NAME = SDL_LoadFunction(_this->egl_data->dll_handle, #NAME); \
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if (!_this->egl_data->NAME) \
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{ \
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    return SDL_SetError("Could not retrieve EGL function " #NAME); \
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}
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static const char * SDL_EGL_GetErrorName(EGLint eglErrorCode)
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{
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#define SDL_EGL_ERROR_TRANSLATE(e) case e: return #e;
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    switch (eglErrorCode) {
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        SDL_EGL_ERROR_TRANSLATE(EGL_SUCCESS);
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        SDL_EGL_ERROR_TRANSLATE(EGL_NOT_INITIALIZED);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ACCESS);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ALLOC);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ATTRIBUTE);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONTEXT);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONFIG);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CURRENT_SURFACE);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_DISPLAY);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_SURFACE);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_MATCH);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_PARAMETER);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_PIXMAP);
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        SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_WINDOW);
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        SDL_EGL_ERROR_TRANSLATE(EGL_CONTEXT_LOST);
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    }
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    return "";
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}
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int SDL_EGL_SetErrorEx(const char * message, const char * eglFunctionName, EGLint eglErrorCode)
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{
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    const char * errorText = SDL_EGL_GetErrorName(eglErrorCode);
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    char altErrorText[32];
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    if (errorText[0] == '\0') {
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        /* An unknown-to-SDL error code was reported.  Report its hexadecimal value, instead of its name. */
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        SDL_snprintf(altErrorText, SDL_arraysize(altErrorText), "0x%x", (unsigned int)eglErrorCode);
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        errorText = altErrorText;
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    }
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    return SDL_SetError("%s (call to %s failed, reporting an error of %s)", message, eglFunctionName, errorText);
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}
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/* EGL implementation of SDL OpenGL ES support */
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typedef enum {
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    SDL_EGL_DISPLAY_EXTENSION,
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    SDL_EGL_CLIENT_EXTENSION
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} SDL_EGL_ExtensionType;
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static SDL_bool SDL_EGL_HasExtension(_THIS, SDL_EGL_ExtensionType type, const char *ext)
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{
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    size_t ext_len;
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    const char *ext_override;
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    const char *egl_extstr;
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    const char *ext_start;
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    /* Invalid extensions can be rejected early */
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    if (ext == NULL || *ext == 0 || SDL_strchr(ext, ' ') != NULL) {
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        /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid EGL extension"); */
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        return SDL_FALSE;
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    }
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    /* Extensions can be masked with an environment variable.
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     * Unlike the OpenGL override, this will use the set bits of an integer
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     * to disable the extension.
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     *  Bit   Action
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     *  0     If set, the display extension is masked and not present to SDL.
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     *  1     If set, the client extension is masked and not present to SDL.
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     */
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    ext_override = SDL_getenv(ext);
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    if (ext_override != NULL) {
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        int disable_ext = SDL_atoi(ext_override);
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        if (disable_ext & 0x01 && type == SDL_EGL_DISPLAY_EXTENSION) {
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            return SDL_FALSE;
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        } else if (disable_ext & 0x02 && type == SDL_EGL_CLIENT_EXTENSION) {
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            return SDL_FALSE;
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        }
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    }
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    ext_len = SDL_strlen(ext);
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    switch (type) {
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    case SDL_EGL_DISPLAY_EXTENSION:
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        egl_extstr = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_EXTENSIONS);
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        break;
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    case SDL_EGL_CLIENT_EXTENSION:
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        /* EGL_EXT_client_extensions modifies eglQueryString to return client extensions
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         * if EGL_NO_DISPLAY is passed. Implementations without it are required to return NULL.
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         * This behavior is included in EGL 1.5.
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         */
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        egl_extstr = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
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        break;
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    default:
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        /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid extension type"); */
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        return SDL_FALSE;
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    }
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    if (egl_extstr != NULL) {
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        ext_start = egl_extstr;
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        while (*ext_start) {
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            ext_start = SDL_strstr(ext_start, ext);
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            if (ext_start == NULL) {
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                return SDL_FALSE;
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            }
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            /* Check if the match is not just a substring of one of the extensions */
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            if (ext_start == egl_extstr || *(ext_start - 1) == ' ') {
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                if (ext_start[ext_len] == ' ' || ext_start[ext_len] == 0) {
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                    return SDL_TRUE;
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                }
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            }
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            /* If the search stopped in the middle of an extension, skip to the end of it */
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            ext_start += ext_len;
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            while (*ext_start != ' ' && *ext_start != 0) {
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                ext_start++;
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            }
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        }
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    }
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    return SDL_FALSE;
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}
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void *
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SDL_EGL_GetProcAddress(_THIS, const char *proc)
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{
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    static char procname[1024];
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    void *retval;
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    /* eglGetProcAddress is busted on Android http://code.google.com/p/android/issues/detail?id=7681 */
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#if !defined(SDL_VIDEO_DRIVER_ANDROID) && !defined(SDL_VIDEO_DRIVER_MIR) 
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    if (_this->egl_data->eglGetProcAddress) {
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        retval = _this->egl_data->eglGetProcAddress(proc);
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        if (retval) {
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            return retval;
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        }
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    }
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#endif
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    retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, proc);
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    if (!retval && SDL_strlen(proc) <= 1022) {
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        procname[0] = '_';
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        SDL_strlcpy(procname + 1, proc, 1022);
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        retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, procname);
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    }
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    return retval;
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}
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void
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SDL_EGL_UnloadLibrary(_THIS)
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{
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    if (_this->egl_data) {
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        if (_this->egl_data->egl_display) {
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            _this->egl_data->eglTerminate(_this->egl_data->egl_display);
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            _this->egl_data->egl_display = NULL;
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        }
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        if (_this->egl_data->dll_handle) {
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            SDL_UnloadObject(_this->egl_data->dll_handle);
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            _this->egl_data->dll_handle = NULL;
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        }
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        if (_this->egl_data->egl_dll_handle) {
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            SDL_UnloadObject(_this->egl_data->egl_dll_handle);
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            _this->egl_data->egl_dll_handle = NULL;
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        }
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        SDL_free(_this->egl_data);
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        _this->egl_data = NULL;
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    }
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}
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int
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SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display, EGLenum platform)
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{
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    void *dll_handle = NULL, *egl_dll_handle = NULL; /* The naming is counter intuitive, but hey, I just work here -- Gabriel */
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    const char *path = NULL;
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    int egl_version_major = 0, egl_version_minor = 0;
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#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
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    const char *d3dcompiler;
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#endif
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    if (_this->egl_data) {
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        return SDL_SetError("OpenGL ES context already created");
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    }
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    _this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
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    if (!_this->egl_data) {
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        return SDL_OutOfMemory();
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    }
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#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
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    d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER);
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    if (!d3dcompiler) {
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        if (WIN_IsWindowsVistaOrGreater()) {
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            d3dcompiler = "d3dcompiler_46.dll";
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        } else {
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            d3dcompiler = "d3dcompiler_43.dll";
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        }
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    }
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    if (SDL_strcasecmp(d3dcompiler, "none") != 0) {
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        SDL_LoadObject(d3dcompiler);
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    }
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#endif
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    /* A funny thing, loading EGL.so first does not work on the Raspberry, so we load libGL* first */
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    path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
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    if (path != NULL) {
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        egl_dll_handle = SDL_LoadObject(path);
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    }
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    if (egl_dll_handle == NULL) {
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        if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
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            if (_this->gl_config.major_version > 1) {
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                path = DEFAULT_OGL_ES2;
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                egl_dll_handle = SDL_LoadObject(path);
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            } else {
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                path = DEFAULT_OGL_ES;
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                egl_dll_handle = SDL_LoadObject(path);
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                if (egl_dll_handle == NULL) {
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                    path = DEFAULT_OGL_ES_PVR;
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                    egl_dll_handle = SDL_LoadObject(path);
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                }
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            }
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        }
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#ifdef DEFAULT_OGL         
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        else {
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            path = DEFAULT_OGL;
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            egl_dll_handle = SDL_LoadObject(path);
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        }
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#endif        
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    }
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    _this->egl_data->egl_dll_handle = egl_dll_handle;
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    if (egl_dll_handle == NULL) {
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        return SDL_SetError("Could not initialize OpenGL / GLES library");
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    }
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    /* Loading libGL* in the previous step took care of loading libEGL.so, but we future proof by double checking */
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    if (egl_path != NULL) {
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        dll_handle = SDL_LoadObject(egl_path);
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    }   
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    /* Try loading a EGL symbol, if it does not work try the default library paths */
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    if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
gabomdq@8021
   315
        if (dll_handle != NULL) {
gabomdq@8021
   316
            SDL_UnloadObject(dll_handle);
gabomdq@8021
   317
        }
gabomdq@8021
   318
        path = SDL_getenv("SDL_VIDEO_EGL_DRIVER");
gabomdq@7659
   319
        if (path == NULL) {
gabomdq@7659
   320
            path = DEFAULT_EGL;
gabomdq@7659
   321
        }
gabomdq@8021
   322
        dll_handle = SDL_LoadObject(path);
gabomdq@8872
   323
        if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
gabomdq@8872
   324
            if (dll_handle != NULL) {
gabomdq@8872
   325
                SDL_UnloadObject(dll_handle);
gabomdq@8872
   326
            }
gabomdq@8021
   327
            return SDL_SetError("Could not load EGL library");
gabomdq@8021
   328
        }
gabomdq@8763
   329
        SDL_ClearError();
gabomdq@7753
   330
    }
slouken@7865
   331
gabomdq@8021
   332
    _this->egl_data->dll_handle = dll_handle;
gabomdq@7659
   333
gabomdq@7659
   334
    /* Load new function pointers */
gabomdq@7659
   335
    LOAD_FUNC(eglGetDisplay);
gabomdq@7659
   336
    LOAD_FUNC(eglInitialize);
gabomdq@7659
   337
    LOAD_FUNC(eglTerminate);
gabomdq@7659
   338
    LOAD_FUNC(eglGetProcAddress);
gabomdq@7659
   339
    LOAD_FUNC(eglChooseConfig);
gabomdq@7659
   340
    LOAD_FUNC(eglGetConfigAttrib);
gabomdq@7659
   341
    LOAD_FUNC(eglCreateContext);
gabomdq@7659
   342
    LOAD_FUNC(eglDestroyContext);
gabomdq@7659
   343
    LOAD_FUNC(eglCreateWindowSurface);
gabomdq@7659
   344
    LOAD_FUNC(eglDestroySurface);
gabomdq@7659
   345
    LOAD_FUNC(eglMakeCurrent);
gabomdq@7659
   346
    LOAD_FUNC(eglSwapBuffers);
gabomdq@7659
   347
    LOAD_FUNC(eglSwapInterval);
gabomdq@7659
   348
    LOAD_FUNC(eglWaitNative);
gabomdq@7659
   349
    LOAD_FUNC(eglWaitGL);
gabomdq@8062
   350
    LOAD_FUNC(eglBindAPI);
knut@8962
   351
    LOAD_FUNC(eglQueryString);
dludwig@10740
   352
    LOAD_FUNC(eglGetError);
dludwig@10740
   353
slouken@11175
   354
    if (_this->egl_data->eglQueryString) {
slouken@11175
   355
        /* EGL 1.5 allows querying for client version */
slouken@11175
   356
        const char *egl_version = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_VERSION);
slouken@11175
   357
        if (egl_version != NULL) {
slouken@11175
   358
            if (SDL_sscanf(egl_version, "%d.%d", &egl_version_major, &egl_version_minor) != 2) {
slouken@11175
   359
                egl_version_major = 0;
slouken@11175
   360
                egl_version_minor = 0;
slouken@11175
   361
                SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not parse EGL version string: %s", egl_version);
slouken@11175
   362
            }
slouken@11175
   363
        }
slouken@11175
   364
    }
slouken@11175
   365
slouken@11175
   366
    if (egl_version_major == 1 && egl_version_minor == 5) {
slouken@11175
   367
        LOAD_FUNC(eglGetPlatformDisplay);
slouken@11175
   368
    }
slouken@11175
   369
slouken@11175
   370
    _this->egl_data->egl_display = EGL_NO_DISPLAY;
dludwig@8663
   371
#if !defined(__WINRT__)
slouken@11175
   372
    if (platform) {
slouken@11175
   373
        if (egl_version_major == 1 && egl_version_minor == 5) {
philipp@11192
   374
            _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplay(platform, (void *)native_display, NULL);
slouken@11175
   375
        } else {
slouken@11175
   376
            if (SDL_EGL_HasExtension(_this, SDL_EGL_CLIENT_EXTENSION, "EGL_EXT_platform_base")) {
slouken@11175
   377
                _this->egl_data->eglGetPlatformDisplayEXT = SDL_EGL_GetProcAddress(_this, "eglGetPlatformDisplayEXT");
slouken@11175
   378
                if (_this->egl_data->eglGetPlatformDisplayEXT) {
philipp@11192
   379
                    _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(platform, (void *)native_display, NULL);
slouken@11175
   380
                }
slouken@11175
   381
            }
slouken@11175
   382
        }
slouken@11175
   383
    }
slouken@11175
   384
    /* Try the implementation-specific eglGetDisplay even if eglGetPlatformDisplay fails */
slouken@11175
   385
    if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
slouken@11175
   386
        _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display);
slouken@11175
   387
    }
slouken@11175
   388
    if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
gabomdq@7659
   389
        return SDL_SetError("Could not get EGL display");
gabomdq@7659
   390
    }
gabomdq@7659
   391
    
gabomdq@7659
   392
    if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
gabomdq@7659
   393
        return SDL_SetError("Could not initialize EGL");
gabomdq@7659
   394
    }
dludwig@8663
   395
#endif
gabomdq@7659
   396
gabomdq@7659
   397
    if (path) {
gabomdq@8021
   398
        SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
gabomdq@7659
   399
    } else {
gabomdq@8021
   400
        *_this->gl_config.driver_path = '\0';
gabomdq@7659
   401
    }
gabomdq@7659
   402
    
gabomdq@8041
   403
    return 0;
gabomdq@7659
   404
}
gabomdq@7659
   405
gabomdq@7659
   406
int
gabomdq@7659
   407
SDL_EGL_ChooseConfig(_THIS) 
gabomdq@7659
   408
{
slouken@11175
   409
/* 64 seems nice. */
gabomdq@7659
   410
    EGLint attribs[64];
gabomdq@8021
   411
    EGLint found_configs = 0, value;
slouken@11175
   412
#ifdef SDL_VIDEO_DRIVER_KMSDRM
slouken@11175
   413
    /* Intel EGL on KMS/DRM (al least) returns invalid configs that confuse the bitdiff search used */
slouken@11175
   414
    /* later in this function, so we simply use the first one when using the KMSDRM driver for now. */
slouken@11175
   415
    EGLConfig configs[1];
slouken@11175
   416
#else
gabomdq@8015
   417
    /* 128 seems even nicer here */
gabomdq@8015
   418
    EGLConfig configs[128];
slouken@11175
   419
#endif
gabomdq@8021
   420
    int i, j, best_bitdiff = -1, bitdiff;
slouken@11175
   421
   
gabomdq@7659
   422
    if (!_this->egl_data) {
gabomdq@7659
   423
        /* The EGL library wasn't loaded, SDL_GetError() should have info */
gabomdq@7659
   424
        return -1;
gabomdq@7659
   425
    }
gabomdq@7659
   426
  
gabomdq@7659
   427
    /* Get a valid EGL configuration */
gabomdq@7659
   428
    i = 0;
gabomdq@7659
   429
    attribs[i++] = EGL_RED_SIZE;
gabomdq@7659
   430
    attribs[i++] = _this->gl_config.red_size;
gabomdq@7659
   431
    attribs[i++] = EGL_GREEN_SIZE;
gabomdq@7659
   432
    attribs[i++] = _this->gl_config.green_size;
gabomdq@7659
   433
    attribs[i++] = EGL_BLUE_SIZE;
gabomdq@7659
   434
    attribs[i++] = _this->gl_config.blue_size;
gabomdq@7659
   435
    
gabomdq@7659
   436
    if (_this->gl_config.alpha_size) {
gabomdq@7659
   437
        attribs[i++] = EGL_ALPHA_SIZE;
gabomdq@7659
   438
        attribs[i++] = _this->gl_config.alpha_size;
gabomdq@7659
   439
    }
gabomdq@7659
   440
    
gabomdq@7659
   441
    if (_this->gl_config.buffer_size) {
gabomdq@7659
   442
        attribs[i++] = EGL_BUFFER_SIZE;
gabomdq@7659
   443
        attribs[i++] = _this->gl_config.buffer_size;
gabomdq@7659
   444
    }
gabomdq@7659
   445
    
gabomdq@7659
   446
    attribs[i++] = EGL_DEPTH_SIZE;
gabomdq@7659
   447
    attribs[i++] = _this->gl_config.depth_size;
gabomdq@7659
   448
    
gabomdq@7659
   449
    if (_this->gl_config.stencil_size) {
gabomdq@7659
   450
        attribs[i++] = EGL_STENCIL_SIZE;
gabomdq@7659
   451
        attribs[i++] = _this->gl_config.stencil_size;
gabomdq@7659
   452
    }
gabomdq@7659
   453
    
gabomdq@7659
   454
    if (_this->gl_config.multisamplebuffers) {
gabomdq@7659
   455
        attribs[i++] = EGL_SAMPLE_BUFFERS;
gabomdq@7659
   456
        attribs[i++] = _this->gl_config.multisamplebuffers;
gabomdq@7659
   457
    }
gabomdq@7659
   458
    
gabomdq@7659
   459
    if (_this->gl_config.multisamplesamples) {
gabomdq@7659
   460
        attribs[i++] = EGL_SAMPLES;
gabomdq@7659
   461
        attribs[i++] = _this->gl_config.multisamplesamples;
gabomdq@7659
   462
    }
slime73@9595
   463
slime73@9827
   464
    if (_this->gl_config.framebuffer_srgb_capable) {
slime73@9827
   465
#ifdef EGL_KHR_gl_colorspace
slouken@11175
   466
        if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_gl_colorspace")) {
slime73@9827
   467
            attribs[i++] = EGL_GL_COLORSPACE_KHR;
slime73@9827
   468
            attribs[i++] = EGL_GL_COLORSPACE_SRGB_KHR;
slime73@9827
   469
        } else
slime73@9827
   470
#endif
slime73@9827
   471
        {
slime73@9827
   472
            return SDL_SetError("EGL implementation does not support sRGB system framebuffers");
slime73@9827
   473
        }
slime73@9827
   474
    }
slime73@9827
   475
gabomdq@7659
   476
    attribs[i++] = EGL_RENDERABLE_TYPE;
slime73@9595
   477
    if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
slime73@9595
   478
#ifdef EGL_KHR_create_context
slime73@9595
   479
        if (_this->gl_config.major_version >= 3 &&
slouken@11175
   480
            SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
slime73@9595
   481
            attribs[i++] = EGL_OPENGL_ES3_BIT_KHR;
slime73@9595
   482
        } else
slime73@9595
   483
#endif
slime73@9595
   484
        if (_this->gl_config.major_version >= 2) {
gabomdq@8062
   485
            attribs[i++] = EGL_OPENGL_ES2_BIT;
gabomdq@8062
   486
        } else {
gabomdq@8062
   487
            attribs[i++] = EGL_OPENGL_ES_BIT;
gabomdq@8062
   488
        }
gabomdq@8062
   489
        _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
slime73@9595
   490
    } else {
gabomdq@8062
   491
        attribs[i++] = EGL_OPENGL_BIT;
gabomdq@8062
   492
        _this->egl_data->eglBindAPI(EGL_OPENGL_API);
gabomdq@7659
   493
    }
slime73@9827
   494
gabomdq@7659
   495
    attribs[i++] = EGL_NONE;
slime73@9827
   496
gabomdq@7659
   497
    if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display,
gabomdq@7659
   498
        attribs,
gabomdq@8015
   499
        configs, SDL_arraysize(configs),
gabomdq@7659
   500
        &found_configs) == EGL_FALSE ||
gabomdq@7659
   501
        found_configs == 0) {
dludwig@10740
   502
        return SDL_EGL_SetError("Couldn't find matching EGL config", "eglChooseConfig");
gabomdq@7659
   503
    }
slime73@9827
   504
gabomdq@8015
   505
    /* eglChooseConfig returns a number of configurations that match or exceed the requested attribs. */
gabomdq@8015
   506
    /* From those, we select the one that matches our requirements more closely via a makeshift algorithm */
gabomdq@8021
   507
slime73@9595
   508
    for (i = 0; i < found_configs; i++ ) {
gabomdq@8015
   509
        bitdiff = 0;
gabomdq@8021
   510
        for (j = 0; j < SDL_arraysize(attribs) - 1; j += 2) {
gabomdq@8015
   511
            if (attribs[j] == EGL_NONE) {
gabomdq@8015
   512
               break;
gabomdq@8015
   513
            }
gabomdq@8015
   514
            
gabomdq@8015
   515
            if ( attribs[j+1] != EGL_DONT_CARE && (
gabomdq@8015
   516
                attribs[j] == EGL_RED_SIZE ||
gabomdq@8015
   517
                attribs[j] == EGL_GREEN_SIZE ||
gabomdq@8015
   518
                attribs[j] == EGL_BLUE_SIZE ||
gabomdq@8015
   519
                attribs[j] == EGL_ALPHA_SIZE ||
gabomdq@8015
   520
                attribs[j] == EGL_DEPTH_SIZE ||
gabomdq@8015
   521
                attribs[j] == EGL_STENCIL_SIZE)) {
gabomdq@8015
   522
                _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], attribs[j], &value);
gabomdq@8015
   523
                bitdiff += value - attribs[j + 1]; /* value is always >= attrib */
gabomdq@8015
   524
            }
gabomdq@8015
   525
        }
gabomdq@8015
   526
gabomdq@8015
   527
        if (bitdiff < best_bitdiff || best_bitdiff == -1) {
gabomdq@8015
   528
            _this->egl_data->egl_config = configs[i];
gabomdq@8015
   529
            
gabomdq@8015
   530
            best_bitdiff = bitdiff;
gabomdq@8015
   531
        }
slime73@9595
   532
slime73@9595
   533
        if (bitdiff == 0) {
slime73@9595
   534
            break; /* we found an exact match! */
slime73@9595
   535
        }
gabomdq@8015
   536
    }
gabomdq@8015
   537
    
gabomdq@7659
   538
    return 0;
gabomdq@7659
   539
}
gabomdq@7659
   540
gabomdq@7659
   541
SDL_GLContext
gabomdq@7659
   542
SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface)
gabomdq@7659
   543
{
slime73@9595
   544
    /* max 14 values plus terminator. */
slime73@9595
   545
    EGLint attribs[15];
slime73@9595
   546
    int attr = 0;
slime73@9595
   547
gabomdq@8061
   548
    EGLContext egl_context, share_context = EGL_NO_CONTEXT;
slime73@9595
   549
    EGLint profile_mask = _this->gl_config.profile_mask;
slime73@9637
   550
    EGLint major_version = _this->gl_config.major_version;
slime73@9637
   551
    EGLint minor_version = _this->gl_config.minor_version;
slime73@9637
   552
    SDL_bool profile_es = (profile_mask == SDL_GL_CONTEXT_PROFILE_ES);
slime73@9595
   553
gabomdq@7659
   554
    if (!_this->egl_data) {
gabomdq@7659
   555
        /* The EGL library wasn't loaded, SDL_GetError() should have info */
gabomdq@7659
   556
        return NULL;
gabomdq@7659
   557
    }
slime73@9595
   558
gabomdq@8061
   559
    if (_this->gl_config.share_with_current_context) {
gabomdq@8061
   560
        share_context = (EGLContext)SDL_GL_GetCurrentContext();
gabomdq@7659
   561
    }
slime73@9595
   562
slime73@9595
   563
    /* Set the context version and other attributes. */
slime73@9637
   564
    if ((major_version < 3 || (minor_version == 0 && profile_es)) &&
slime73@9637
   565
        _this->gl_config.flags == 0 &&
slime73@9637
   566
        (profile_mask == 0 || profile_es)) {
slime73@9637
   567
        /* Create a context without using EGL_KHR_create_context attribs.
slime73@9637
   568
         * When creating a GLES context without EGL_KHR_create_context we can
slime73@9637
   569
         * only specify the major version. When creating a desktop GL context
slime73@9637
   570
         * we can't specify any version, so we only try in that case when the
slime73@9637
   571
         * version is less than 3.0 (matches SDL's GLX/WGL behavior.)
slime73@9637
   572
         */
slime73@9637
   573
        if (profile_es) {
slime73@9595
   574
            attribs[attr++] = EGL_CONTEXT_CLIENT_VERSION;
slime73@9637
   575
            attribs[attr++] = SDL_max(major_version, 1);
slime73@9595
   576
        }
slime73@9595
   577
    } else {
slime73@9595
   578
#ifdef EGL_KHR_create_context
slime73@9595
   579
        /* The Major/minor version, context profiles, and context flags can
slime73@9595
   580
         * only be specified when this extension is available.
slime73@9595
   581
         */
slouken@11175
   582
        if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
slime73@9595
   583
            attribs[attr++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
slime73@9637
   584
            attribs[attr++] = major_version;
slime73@9595
   585
            attribs[attr++] = EGL_CONTEXT_MINOR_VERSION_KHR;
slime73@9637
   586
            attribs[attr++] = minor_version;
slime73@9595
   587
slime73@9595
   588
            /* SDL profile bits match EGL profile bits. */
slime73@9595
   589
            if (profile_mask != 0 && profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
slime73@9595
   590
                attribs[attr++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
slime73@9595
   591
                attribs[attr++] = profile_mask;
slime73@9595
   592
            }
slime73@9595
   593
slime73@9595
   594
            /* SDL flags match EGL flags. */
slime73@9595
   595
            if (_this->gl_config.flags != 0) {
slime73@9595
   596
                attribs[attr++] = EGL_CONTEXT_FLAGS_KHR;
slime73@9595
   597
                attribs[attr++] = _this->gl_config.flags;
slime73@9595
   598
            }
slime73@9595
   599
        } else
slime73@9595
   600
#endif /* EGL_KHR_create_context */
slime73@9595
   601
        {
slime73@9595
   602
            SDL_SetError("Could not create EGL context (context attributes are not supported)");
slime73@9595
   603
            return NULL;
slime73@9595
   604
        }
slime73@9595
   605
    }
slime73@9595
   606
slime73@9595
   607
    attribs[attr++] = EGL_NONE;
slime73@9595
   608
gabomdq@8062
   609
    /* Bind the API */
slime73@9637
   610
    if (profile_es) {
gabomdq@8062
   611
        _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
slime73@9595
   612
    } else {
slime73@9595
   613
        _this->egl_data->eglBindAPI(EGL_OPENGL_API);
slime73@9595
   614
    }
gabomdq@7659
   615
slime73@9595
   616
    egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display,
slime73@9595
   617
                                      _this->egl_data->egl_config,
slime73@9595
   618
                                      share_context, attribs);
knut@8962
   619
gabomdq@7659
   620
    if (egl_context == EGL_NO_CONTEXT) {
dludwig@10740
   621
        SDL_EGL_SetError("Could not create EGL context", "eglCreateContext");
gabomdq@7659
   622
        return NULL;
gabomdq@7659
   623
    }
slime73@9595
   624
gabomdq@7659
   625
    _this->egl_data->egl_swapinterval = 0;
slime73@9595
   626
gabomdq@7659
   627
    if (SDL_EGL_MakeCurrent(_this, egl_surface, egl_context) < 0) {
dludwig@10740
   628
        /* Save the SDL error set by SDL_EGL_MakeCurrent */
dludwig@10740
   629
        char errorText[1024];
dludwig@10740
   630
        SDL_strlcpy(errorText, SDL_GetError(), SDL_arraysize(errorText));
dludwig@10740
   631
dludwig@10740
   632
        /* Delete the context, which may alter the value returned by SDL_GetError() */
gabomdq@7659
   633
        SDL_EGL_DeleteContext(_this, egl_context);
dludwig@10740
   634
dludwig@10740
   635
        /* Restore the SDL error */
dludwig@10740
   636
        SDL_SetError("%s", errorText);
dludwig@10740
   637
gabomdq@7659
   638
        return NULL;
gabomdq@7659
   639
    }
slime73@9595
   640
gabomdq@7659
   641
    return (SDL_GLContext) egl_context;
gabomdq@7659
   642
}
gabomdq@7659
   643
gabomdq@7659
   644
int
gabomdq@7659
   645
SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context)
gabomdq@7659
   646
{
gabomdq@7679
   647
    EGLContext egl_context = (EGLContext) context;
gabomdq@7679
   648
gabomdq@7659
   649
    if (!_this->egl_data) {
gabomdq@7659
   650
        return SDL_SetError("OpenGL not initialized");
gabomdq@7659
   651
    }
gabomdq@7659
   652
    
gabomdq@7659
   653
    /* The android emulator crashes badly if you try to eglMakeCurrent 
gabomdq@7659
   654
     * with a valid context and invalid surface, so we have to check for both here.
gabomdq@7659
   655
     */
gabomdq@7659
   656
    if (!egl_context || !egl_surface) {
gabomdq@7659
   657
         _this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
slime73@9595
   658
    } else {
gabomdq@7659
   659
        if (!_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display,
gabomdq@7659
   660
            egl_surface, egl_surface, egl_context)) {
dludwig@10740
   661
            return SDL_EGL_SetError("Unable to make EGL context current", "eglMakeCurrent");
gabomdq@7659
   662
        }
gabomdq@7659
   663
    }
gabomdq@7659
   664
      
gabomdq@7659
   665
    return 0;
gabomdq@7659
   666
}
gabomdq@7659
   667
gabomdq@7659
   668
int
gabomdq@7659
   669
SDL_EGL_SetSwapInterval(_THIS, int interval)
gabomdq@7659
   670
{
gabomdq@7679
   671
    EGLBoolean status;
gabomdq@7679
   672
    
gabomdq@7702
   673
    if (!_this->egl_data) {
gabomdq@7702
   674
        return SDL_SetError("EGL not initialized");
gabomdq@7659
   675
    }
gabomdq@7659
   676
    
gabomdq@7659
   677
    status = _this->egl_data->eglSwapInterval(_this->egl_data->egl_display, interval);
gabomdq@7659
   678
    if (status == EGL_TRUE) {
gabomdq@7659
   679
        _this->egl_data->egl_swapinterval = interval;
gabomdq@7659
   680
        return 0;
gabomdq@7659
   681
    }
gabomdq@7659
   682
    
dludwig@10740
   683
    return SDL_EGL_SetError("Unable to set the EGL swap interval", "eglSwapInterval");
gabomdq@7659
   684
}
gabomdq@7659
   685
gabomdq@7659
   686
int
gabomdq@7659
   687
SDL_EGL_GetSwapInterval(_THIS)
gabomdq@7659
   688
{
gabomdq@7702
   689
    if (!_this->egl_data) {
philipp@10169
   690
        SDL_SetError("EGL not initialized");
philipp@10169
   691
        return 0;
gabomdq@7659
   692
    }
gabomdq@7659
   693
    
gabomdq@7659
   694
    return _this->egl_data->egl_swapinterval;
gabomdq@7659
   695
}
gabomdq@7659
   696
slouken@10693
   697
int
gabomdq@7659
   698
SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface)
gabomdq@7659
   699
{
slouken@10693
   700
    if (!_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, egl_surface)) {
dludwig@10740
   701
        return SDL_EGL_SetError("unable to show color buffer in an OS-native window", "eglSwapBuffers");
slouken@10693
   702
    }
slouken@10693
   703
    return 0;
gabomdq@7659
   704
}
gabomdq@7659
   705
gabomdq@7659
   706
void
gabomdq@7659
   707
SDL_EGL_DeleteContext(_THIS, SDL_GLContext context)
gabomdq@7659
   708
{
gabomdq@7679
   709
    EGLContext egl_context = (EGLContext) context;
gabomdq@7679
   710
gabomdq@7659
   711
    /* Clean up GLES and EGL */
gabomdq@7659
   712
    if (!_this->egl_data) {
gabomdq@7659
   713
        return;
gabomdq@7659
   714
    }
gabomdq@7659
   715
    
gabomdq@7896
   716
    if (egl_context != NULL && egl_context != EGL_NO_CONTEXT) {
gabomdq@7659
   717
        SDL_EGL_MakeCurrent(_this, NULL, NULL);
gabomdq@7659
   718
        _this->egl_data->eglDestroyContext(_this->egl_data->egl_display, egl_context);
gabomdq@7659
   719
    }
gabomdq@7659
   720
        
gabomdq@7659
   721
}
gabomdq@7659
   722
gabomdq@7659
   723
EGLSurface *
gabomdq@7659
   724
SDL_EGL_CreateSurface(_THIS, NativeWindowType nw) 
gabomdq@7659
   725
{
dludwig@10740
   726
    EGLSurface * surface;
dludwig@10740
   727
gabomdq@8041
   728
    if (SDL_EGL_ChooseConfig(_this) != 0) {
slouken@8045
   729
        return EGL_NO_SURFACE;
gabomdq@8041
   730
    }
gabomdq@8041
   731
    
slouken@10878
   732
#if SDL_VIDEO_DRIVER_ANDROID
slouken@8976
   733
    {
slouken@8976
   734
        /* Android docs recommend doing this!
slouken@8976
   735
         * Ref: http://developer.android.com/reference/android/app/NativeActivity.html 
slouken@8976
   736
         */
slouken@8976
   737
        EGLint format;
slouken@8976
   738
        _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
slouken@8976
   739
                                            _this->egl_data->egl_config, 
slouken@8976
   740
                                            EGL_NATIVE_VISUAL_ID, &format);
gabomdq@8971
   741
slouken@8976
   742
        ANativeWindow_setBuffersGeometry(nw, 0, 0, format);
slouken@8976
   743
    }
gabomdq@8971
   744
#endif    
gabomdq@8971
   745
    
dludwig@10740
   746
    surface = _this->egl_data->eglCreateWindowSurface(
gabomdq@7659
   747
            _this->egl_data->egl_display,
gabomdq@7659
   748
            _this->egl_data->egl_config,
gabomdq@7659
   749
            nw, NULL);
dludwig@10740
   750
    if (surface == EGL_NO_SURFACE) {
dludwig@10740
   751
        SDL_EGL_SetError("unable to create an EGL window surface", "eglCreateWindowSurface");
dludwig@10740
   752
    }
dludwig@10740
   753
    return surface;
gabomdq@7659
   754
}
gabomdq@7659
   755
gabomdq@7659
   756
void
gabomdq@7659
   757
SDL_EGL_DestroySurface(_THIS, EGLSurface egl_surface) 
gabomdq@7659
   758
{
gabomdq@7659
   759
    if (!_this->egl_data) {
gabomdq@7659
   760
        return;
gabomdq@7659
   761
    }
gabomdq@7659
   762
    
gabomdq@7659
   763
    if (egl_surface != EGL_NO_SURFACE) {
gabomdq@7659
   764
        _this->egl_data->eglDestroySurface(_this->egl_data->egl_display, egl_surface);
gabomdq@7659
   765
    }
gabomdq@7659
   766
}
gabomdq@7659
   767
gabomdq@7659
   768
#endif /* SDL_VIDEO_OPENGL_EGL */
gabomdq@7659
   769
gabomdq@7659
   770
/* vi: set ts=4 sw=4 expandtab: */
philipp@11192
   771