EGLSurface *
SDL_EGL_CreateSurface(_THIS, NativeWindowType nw)
{
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
surface = _this->egl_data->eglCreateWindowSurface(
_this->egl_data->egl_display,
_this->egl_data->egl_config,
nw, NULL);
if (surface == EGL_NO_SURFACE) {
SDL_EGL_SetError("unable to create an EGL window surface", "eglCreateWindowSurface");
}
return surface;
}
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;
}
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);
/* Update SurfaceView holder format.
* May triggers a sequence surfaceDestroyed(), surfaceCreated(), surfaceChanged(). */
Android_JNI_SetSurfaceViewFormat(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;
}
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_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;
}
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();
}
/* 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, "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;
}
}
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_ChooseConfig(_THIS)
{
/* 64 seems nice. */
EGLint attribs[64];
EGLint found_configs = 0, value;
/* 128 seems even nicer here */
EGLConfig configs[128];
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;
}
if (_this->gl_config.framebuffer_srgb_capable) {
#ifdef EGL_KHR_gl_colorspace
if (SDL_EGL_HasExtension(_this, "EGL_KHR_gl_colorspace")) {
attribs[i++] = EGL_GL_COLORSPACE_KHR;
attribs[i++] = EGL_GL_COLORSPACE_SRGB_KHR;
} else
#endif
{
return SDL_SetError("EGL implementation does not support sRGB system framebuffers");
}
}
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, "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);
}
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! */
}
}
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;
}
