gstreamer/gst-libs/gst/gl/eagl/gstglcontext_eagl.m
Matthew Waters f0eca69a14 gl/display: provide a gst_gl_display_new_with_type()
Allows more fine-grained control over the exact display type that is
created.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1154>
2021-05-19 10:15:56 +00:00

477 lines
15 KiB
Objective-C

/*
* GStreamer
* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#import <OpenGLES/EAGL.h>
#import <QuartzCore/QuartzCore.h>
#import <UIKit/UIKit.h>
#include <OpenGLES/ES2/gl.h>
#include "gstglcontext_eagl.h"
#include "../gstglcontext_private.h"
#include "gstglios_utils.h"
#define GST_GL_CONTEXT_EAGL_CONTEXT(obj) \
((__bridge EAGLContext *)(obj->priv->eagl_context))
#define GST_GL_CONTEXT_EAGL_LAYER(obj) \
((__bridge CAEAGLLayer *)(obj->priv->eagl_layer))
#define GST_CAT_DEFAULT gst_gl_context_debug
static gboolean gst_gl_context_eagl_create_context (GstGLContext * context,
GstGLAPI gl_api, GstGLContext * other_context, GError ** error);
static void gst_gl_context_eagl_destroy_context (GstGLContext * context);
static gboolean gst_gl_context_eagl_choose_format (GstGLContext * context,
GError ** error);
static guintptr gst_gl_context_eagl_get_gl_context (GstGLContext * window);
static gboolean gst_gl_context_eagl_activate (GstGLContext * context,
gboolean activate);
static void gst_gl_context_eagl_swap_buffers (GstGLContext * context);
static GstGLAPI gst_gl_context_eagl_get_gl_api (GstGLContext * context);
static GstGLPlatform gst_gl_context_eagl_get_gl_platform (GstGLContext *
context);
GstStructure *gst_gl_context_eagl_get_config (GstGLContext * context);
struct _GstGLContextEaglPrivate
{
gpointer eagl_context;
/* Used if we render to a window */
gpointer eagl_layer;
GLuint framebuffer;
GLuint color_renderbuffer;
GLuint depth_renderbuffer;
};
G_DEFINE_TYPE_WITH_PRIVATE (GstGLContextEagl, gst_gl_context_eagl,
GST_TYPE_GL_CONTEXT);
static void
gst_gl_context_eagl_class_init (GstGLContextEaglClass * klass)
{
GstGLContextClass *context_class;
context_class = (GstGLContextClass *) klass;
context_class->destroy_context =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_destroy_context);
context_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_create_context);
context_class->choose_format =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_choose_format);
context_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_get_gl_context);
context_class->activate = GST_DEBUG_FUNCPTR (gst_gl_context_eagl_activate);
context_class->swap_buffers =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_swap_buffers);
context_class->get_gl_api =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_get_gl_api);
context_class->get_gl_platform =
GST_DEBUG_FUNCPTR (gst_gl_context_eagl_get_gl_platform);
context_class->get_config = GST_DEBUG_FUNCPTR (gst_gl_context_eagl_get_config);
}
static void
gst_gl_context_eagl_init (GstGLContextEagl * context)
{
context->priv = gst_gl_context_eagl_get_instance_private (context);
}
/* Must be called in the gl thread */
GstGLContextEagl *
gst_gl_context_eagl_new (GstGLDisplay * display)
{
GstGLContextEagl *context;
if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_EAGL)
== GST_GL_DISPLAY_TYPE_NONE) {
GST_INFO ("Wrong display type %u for this window type %u", display->type,
GST_GL_DISPLAY_TYPE_EAGL);
return NULL;
}
context = g_object_new (GST_TYPE_GL_CONTEXT_EAGL, NULL);
gst_object_ref_sink (context);
return context;
}
enum EAGLFormat
{
FORMAT_RGBA8 = 1,
FORMAT_RGB565,
};
static GstStructure *
layer_config_to_structure (GstGLContextEagl *eagl, CAEAGLLayer * layer)
{
GstStructure *ret;
NSDictionary *drawableProps = [layer drawableProperties];
NSString *color_format;
enum EAGLFormat eagl_format = FORMAT_RGBA8;
ret = gst_structure_new (GST_GL_CONFIG_STRUCTURE_NAME,
GST_GL_CONFIG_STRUCTURE_SET_ARGS(PLATFORM, GstGLPlatform, GST_GL_PLATFORM_EAGL),
NULL);
color_format = [drawableProps objectForKey:kEAGLDrawablePropertyColorFormat];
if (!color_format)
color_format = [layer contentsFormat];
if (!color_format) {
GST_WARNING_OBJECT (eagl, "Could not retrieve color format from layer %p", layer);
goto failure;
}
if (color_format == kEAGLColorFormatRGBA8 || color_format == kCAContentsFormatRGBA8Uint) {
eagl_format = FORMAT_RGBA8;
} else if (color_format == kEAGLColorFormatRGB565) {
eagl_format = FORMAT_RGB565;
} else {
GST_WARNING_OBJECT (eagl, "unknown drawable format: %s", [color_format UTF8String]);
goto failure;
}
/* XXX: defaults chosen by _update_layer() */
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(DEPTH_SIZE, int, 16), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(STENCIL_SIZE, int, 0), NULL);
switch (eagl_format) {
case FORMAT_RGBA8:
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(RED_SIZE, int, 8), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(GREEN_SIZE, int, 8), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(BLUE_SIZE, int, 8), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(ALPHA_SIZE, int, 8), NULL);
break;
case FORMAT_RGB565:
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(RED_SIZE, int, 5), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(GREEN_SIZE, int, 6), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(BLUE_SIZE, int, 5), NULL);
gst_structure_set (ret, GST_GL_CONFIG_STRUCTURE_SET_ARGS(ALPHA_SIZE, int, 0), NULL);
break;
default:
GST_WARNING_OBJECT (eagl, "Unhandled format!");
goto failure;
}
return ret;
failure:
gst_structure_free (ret);
return NULL;
}
void
gst_gl_context_eagl_resize (GstGLContextEagl * eagl_context)
{
int width, height;
glBindRenderbuffer (GL_RENDERBUFFER, eagl_context->priv->color_renderbuffer);
[GST_GL_CONTEXT_EAGL_CONTEXT(eagl_context)
renderbufferStorage:GL_RENDERBUFFER
fromDrawable:GST_GL_CONTEXT_EAGL_LAYER(eagl_context)];
glGetRenderbufferParameteriv (GL_RENDERBUFFER,
GL_RENDERBUFFER_WIDTH, &width);
glGetRenderbufferParameteriv (GL_RENDERBUFFER,
GL_RENDERBUFFER_HEIGHT, &height);
glBindRenderbuffer (GL_RENDERBUFFER, eagl_context->priv->depth_renderbuffer);
glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width,
height);
}
static void
gst_gl_context_eagl_release_layer (GstGLContext * context)
{
GstGLContextEagl *context_eagl;
context_eagl = GST_GL_CONTEXT_EAGL (context);
if (context_eagl->priv->eagl_layer) {
gst_gl_context_eagl_activate (context, TRUE);
[GST_GL_CONTEXT_EAGL_CONTEXT(context_eagl)
renderbufferStorage:GL_RENDERBUFFER
fromDrawable:nil];
glDeleteFramebuffers (1, &context_eagl->priv->framebuffer);
context_eagl->priv->framebuffer = 0;
glDeleteRenderbuffers (1, &context_eagl->priv->depth_renderbuffer);
context_eagl->priv->depth_renderbuffer = 0;
glDeleteRenderbuffers (1, &context_eagl->priv->color_renderbuffer);
context_eagl->priv->color_renderbuffer = 0;
CFRelease (context_eagl->priv->eagl_layer);
context_eagl->priv->eagl_layer = NULL;
gst_gl_context_eagl_activate (context, FALSE);
}
}
void
gst_gl_context_eagl_update_layer (GstGLContext * context, gpointer layer)
{
GLuint framebuffer;
GLuint color_renderbuffer;
GLuint depth_renderbuffer;
GLint width;
GLint height;
CAEAGLLayer *eagl_layer;
GLenum status;
GstGLContextEagl *context_eagl = GST_GL_CONTEXT_EAGL (context);
GstGLContextEaglPrivate *priv = context_eagl->priv;
GstGLWindow *window = gst_gl_context_get_window (context);
GstStructure *fmt;
if (!layer || !gst_gl_window_get_window_handle (window)) {
GST_INFO_OBJECT (context, "window handle not set yet, not updating layer");
goto out;
}
if (priv->eagl_layer)
gst_gl_context_eagl_release_layer (context);
eagl_layer = (__bridge CAEAGLLayer *) layer;
[EAGLContext setCurrentContext:GST_GL_CONTEXT_EAGL_CONTEXT(context_eagl)];
/* Allocate framebuffer */
glGenFramebuffers (1, &framebuffer);
glBindFramebuffer (GL_FRAMEBUFFER, framebuffer);
/* Allocate color render buffer */
glGenRenderbuffers (1, &color_renderbuffer);
glBindRenderbuffer (GL_RENDERBUFFER, color_renderbuffer);
[GST_GL_CONTEXT_EAGL_CONTEXT(context_eagl) renderbufferStorage: GL_RENDERBUFFER fromDrawable:eagl_layer];
glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, color_renderbuffer);
/* Get renderbuffer width/height */
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH,
&width);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT,
&height);
/* allocate depth render buffer */
glGenRenderbuffers (1, &depth_renderbuffer);
glBindRenderbuffer (GL_RENDERBUFFER, depth_renderbuffer);
glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width,
height);
glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, depth_renderbuffer);
/* check creation status */
status = glCheckFramebufferStatus (GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE) {
GST_ERROR ("Failed to make complete framebuffer object %x", status);
goto out;
}
glBindRenderbuffer (GL_RENDERBUFFER, 0);
glBindFramebuffer (GL_FRAMEBUFFER, 0);
priv->eagl_layer = (__bridge_retained gpointer) eagl_layer;
priv->framebuffer = framebuffer;
priv->color_renderbuffer = color_renderbuffer;
priv->depth_renderbuffer = depth_renderbuffer;
fmt = layer_config_to_structure (context_eagl, eagl_layer);
if (fmt) {
GST_DEBUG_OBJECT (context_eagl, "chosen config %" GST_PTR_FORMAT, fmt);
gst_structure_free (fmt);
}
out:
if (window)
gst_object_unref (window);
if (layer)
CFRelease (layer);
}
static gboolean
gst_gl_context_eagl_create_context (GstGLContext * context, GstGLAPI gl_api,
GstGLContext * other_context, GError ** error)
{
GstGLContextEagl *context_eagl = GST_GL_CONTEXT_EAGL (context);
GstGLContextEaglPrivate *priv = context_eagl->priv;
GstGLWindow *window;
GstGLWindowEagl *window_eagl;
gpointer layer;
EAGLSharegroup *share_group;
if (other_context) {
EAGLContext *external_gl_context = (__bridge EAGLContext *)(void *)
gst_gl_context_get_gl_context (other_context);
share_group = [external_gl_context sharegroup];
} else {
share_group = nil;
}
priv->eagl_context = (__bridge_retained gpointer)[[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3 sharegroup:share_group];
if (!priv->eagl_context) {
priv->eagl_context = (__bridge_retained gpointer)[[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2 sharegroup:share_group];
}
if (!priv->eagl_context) {
g_set_error_literal (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT,
"Failed to create OpenGL ES context");
return FALSE;
}
priv->eagl_layer = NULL;
priv->framebuffer = 0;
priv->color_renderbuffer = 0;
priv->depth_renderbuffer = 0;
GST_INFO_OBJECT (context, "context created, updating layer");
window = gst_gl_context_get_window (context);
if (!window) {
g_set_error_literal (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT,
"No window to render into");
return FALSE;
}
window_eagl = GST_GL_WINDOW_EAGL (window);
layer = gst_gl_window_eagl_get_layer (window_eagl);
gst_gl_context_eagl_update_layer (context, layer);
gst_object_unref (window);
return TRUE;
}
static void
gst_gl_context_eagl_destroy_context (GstGLContext * context)
{
GstGLContextEagl *context_eagl;
context_eagl = GST_GL_CONTEXT_EAGL (context);
if (!context_eagl->priv->eagl_context)
return;
gst_gl_context_eagl_release_layer (context);
CFRelease(context_eagl->priv->eagl_context);
context_eagl->priv->eagl_context = NULL;
}
static gboolean
gst_gl_context_eagl_choose_format (GstGLContext * context, GError ** error)
{
return TRUE;
}
static guintptr
gst_gl_context_eagl_get_gl_context (GstGLContext * context)
{
return (guintptr) GST_GL_CONTEXT_EAGL (context)->priv->eagl_context;
}
void
gst_gl_context_eagl_prepare_draw (GstGLContextEagl * context)
{
if (!context->priv->eagl_layer)
return;
glBindFramebuffer (GL_FRAMEBUFFER, context->priv->framebuffer);
glBindRenderbuffer (GL_RENDERBUFFER, context->priv->color_renderbuffer);
}
void
gst_gl_context_eagl_finish_draw (GstGLContextEagl * context)
{
if (!context->priv->eagl_layer)
return;
glBindRenderbuffer (GL_RENDERBUFFER, 0);
glBindFramebuffer (GL_FRAMEBUFFER, 0);
}
static void
gst_gl_context_eagl_swap_buffers (GstGLContext * context)
{
GstGLContextEagl *context_eagl;
context_eagl = GST_GL_CONTEXT_EAGL (context);
if (!context_eagl->priv->eagl_layer)
return;
[GST_GL_CONTEXT_EAGL_CONTEXT(context_eagl) presentRenderbuffer:GL_RENDERBUFFER];
}
static gboolean
gst_gl_context_eagl_activate (GstGLContext * context, gboolean activate)
{
GstGLContextEagl *context_eagl;
context_eagl = GST_GL_CONTEXT_EAGL (context);
if (activate) {
EAGLContext *cur_ctx =[EAGLContext currentContext];
if (cur_ctx == context_eagl->priv->eagl_context) {
GST_DEBUG ("Already attached the context to thread %p", g_thread_self ());
return TRUE;
}
GST_DEBUG ("Attaching context to thread %p", g_thread_self ());
if ([EAGLContext setCurrentContext:GST_GL_CONTEXT_EAGL_CONTEXT(context_eagl)] == NO) {
GST_ERROR ("Couldn't make context current");
return FALSE;
}
} else {
GST_DEBUG ("Detaching context from thread %p", g_thread_self ());
if ([EAGLContext setCurrentContext:nil] == NO) {
GST_ERROR ("Couldn't unbind context");
return FALSE;
}
}
return TRUE;
}
static GstGLAPI
gst_gl_context_eagl_get_gl_api (GstGLContext * context)
{
return GST_GL_API_GLES2;
}
static GstGLPlatform
gst_gl_context_eagl_get_gl_platform (GstGLContext * context)
{
return GST_GL_PLATFORM_EAGL;
}
guintptr
gst_gl_context_eagl_get_current_context (void)
{
return (guintptr) [EAGLContext currentContext];
}
GstStructure *
gst_gl_context_eagl_get_config (GstGLContext * context)
{
GstGLContextEagl *eagl = GST_GL_CONTEXT_EAGL (context);
if (!eagl->priv->eagl_layer)
return NULL;
return layer_config_to_structure (eagl, (__bridge CAEAGLLayer *) eagl->priv->eagl_layer);
}