meson: gl: add support for building with dispmanx on the rpi

ext/gl/gstopengl.c

@@ -90,7 +90,7 @@
 extern GType gst_ca_opengl_layer_sink_bin_get_type (void);
 #endif
 
-#ifdef USE_EGL_RPI
+#if GST_GL_HAVE_WINDOW_DISPMANX
 extern void bcm_host_init (void);
 #endif
 
@@ -107,7 +107,7 @@ plugin_init (GstPlugin * plugin)
 {
   GST_DEBUG_CATEGORY_INIT (gst_gl_gstgl_debug, "gstopengl", 0, "gstopengl");
 
-#ifdef USE_EGL_RPI
+#if GST_GL_HAVE_WINDOW_DISPMANX
   GST_DEBUG ("Initialize BCM host");
   bcm_host_init ();
 #endif
@@ -236,7 +236,6 @@ plugin_init (GstPlugin * plugin)
           GST_RANK_NONE, GST_TYPE_GL_DEINTERLACE)) {
     return FALSE;
   }
-
 #if HAVE_JPEG
 #if HAVE_PNG
   if (!gst_element_register (plugin, "gloverlay",

ext/gl/meson.build

@@ -97,6 +97,10 @@ if build_gstgl and gstgl_dep.found()
     optional_deps += x11_dep
   endif
 
+  if bcm_host_dep.found()
+    optional_deps += bcm_host_dep
+  endif
+
   gstopengl = library('gstopengl',
     opengl_sources,
     c_args : gst_plugins_bad_args + opengl_defines,

gst-libs/gst/gl/dispmanx/gstglwindow_dispmanx_egl.h

@@ -25,7 +25,7 @@
 #include <gst/gl/gl.h>
 #include <gst/gl/egl/gstegl.h>
 
-#if defined (USE_EGL_RPI) && defined(__GNUC__)
+#if defined(__GNUC__)
 #ifndef __VCCOREVER__
 #define __VCCOREVER__ 0x04000000
 #endif
@@ -37,7 +37,7 @@
 
 #include <bcm_host.h>
 
-#if defined (USE_EGL_RPI) && defined(__GNUC__)
+#if defined(__GNUC__)
 #pragma GCC reset_options
 #pragma GCC diagnostic pop
 #endif

gst-libs/gst/gl/egl/gstegl.h

@@ -23,7 +23,7 @@
 
 #include <gst/gl/gstglconfig.h>
 
-#if defined (USE_EGL_RPI) && defined(__GNUC__)
+#if GST_GL_HAVE_WINDOW_DISPMANX && defined(__GNUC__)
 #ifndef __VCCOREVER__
 #define __VCCOREVER__ 0x04000000
 #endif
@@ -41,7 +41,7 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
-#if defined (USE_EGL_RPI) && defined(__GNUC__)
+#if GST_GL_HAVE_WINDOW_DISPMANX && defined(__GNUC__)
 #pragma GCC reset_options
 #pragma GCC diagnostic pop
 #endif

gst-libs/gst/gl/meson.build

@@ -105,12 +105,27 @@ gl_platform_deps = []
 gl_winsys_deps = []
 # other things we need.
 gl_misc_deps = []
+# Other preprocessor arguments
+gl_cpp_args = ['-DGST_USE_UNSTABLE_API']
 
 enabled_gl_apis = []
 enabled_gl_platforms = []
 enabled_gl_winsys = []
 
 # parse provided options
+libegl_module_name = get_option('with_egl_module_name')
+if libegl_module_name != ''
+  gl_cpp_args += ['-DGST_GL_LIBEGL_MODULE_NAME="@0@"'.format(libegl_module_name)]
+endif
+libgles2_module_name = get_option('with_gles2_module_name')
+if libgles2_module_name != ''
+  gl_cpp_args += ['-DGST_GL_LIBGLESV2_MODULE_NAME="@0@"'.format(libgles2_module_name)]
+endif
+libgl_module_name = get_option('with_opengl_module_name')
+if libgl_module_name != ''
+  gl_cpp_args += ['-DGST_GL_LIBGL_MODULE_NAME="@0@"'.format(libgl_module_name)]
+endif
+
 gl_apis_s = get_option ('with_gl_api')
 if gl_apis_s == 'auto'
   need_api_opengl = 'auto'
@@ -188,8 +203,8 @@ else
 #      need_win_cocoa = 'yes'
 #    elif winsys == 'eagl'
 #      need_win_eagl = 'yes'
-#    elif winsys == 'dispmanx'
+    elif winsys == 'dispmanx'
-#      need_win_dispmanx = 'yes'
+      need_win_dispmanx = 'yes'
     else
       error('Unsupported GL winsys provided ' + winsys)
     endif
@@ -210,7 +225,7 @@ gl_include_header = '''
 gl_dep = unneeded_dep
 glx_dep = unneeded_dep
 if need_api_opengl != 'no' or need_platform_glx != 'no'
-  gl_dep = dependency('GL', required : false)
+  gl_dep = dependency('gl', required : false)
   if not gl_dep.found()
 #    if host_machine.system() == 'windows'
 #      gl_dep = cc.find_library('opengl32', required : false)
@@ -253,7 +268,7 @@ endif
 # GLES2 checks
 gles2_dep = unneeded_dep
 if need_api_gles2 != 'no'
-  gles2_dep = dependency('GLESv2', required : false)
+  gles2_dep = dependency('glesv2', required : false)
   if not gles2_dep.found()
 #    if host_machine.system() == 'windows'
 #    elif host_machine.system() == 'darwin'
@@ -328,7 +343,7 @@ endif
 # EGL checks
 egl_dep = unneeded_dep
 if need_platform_egl != 'no'
-  egl_dep = dependency('EGL', required : false)
+  egl_dep = dependency('egl', required : false)
   if not egl_dep.found()
     egl_dep = cc.find_library('EGL', required : false)
 
@@ -446,6 +461,27 @@ if need_win_x11 != 'no'
   endif
 endif
 
+bcm_host_dep = unneeded_dep
+if need_win_dispmanx != 'no'
+  bcm_host_dep = dependency('bcm_host', required : false)
+  if bcm_host_dep.found()
+    if not egl_dep.found()
+      error('dispmanx requires the use of egl')
+    endif
+
+    gl_sources += [
+      'dispmanx/gstglwindow_dispmanx_egl.c'
+    ]
+
+    glconf.set('GST_GL_HAVE_WINDOW_DISPMANX', 1)
+    gl_winsys_deps += bcm_host_dep
+    enabled_gl_winsys += 'dispmanx'
+    gl_cpp_args += ['-DUSE_EGL_RPI']
+  elif need_win_dispmanx == 'yes'
+    error('Could not find dispmanx libraries')
+  endif
+endif
+
 # win32 checks
 if need_platform_wgl == 'yes'
   if need_win_win32 == 'no'
@@ -477,8 +513,7 @@ if host_machine.system() == 'darwin'
 endif
 
 # TODO: Add rest of gl config here.
-# --with-{egl,gles2,opengl}-module-name
+# arm-mali, iOS, OS X, win32 specific support
-# rpi, arm-mali, iOS, OS X, win32 specific support
 
 build_gstgl = true
 if gl_lib_deps.length() == 0
@@ -538,7 +573,7 @@ if build_gstgl
 
   gstgl = library('gstgl-' + api_version,
     gl_sources,
-    c_args : gst_plugins_bad_args + ['-DGST_USE_UNSTABLE_API'],
+    c_args : gst_plugins_bad_args + gl_cpp_args,
     include_directories : [configinc, libsinc],
     version : libversion,
     soversion : soversion,
@@ -552,5 +587,5 @@ if build_gstgl
 
   gstgl_dep = declare_dependency(link_with : gstgl,
     include_directories : [libsinc],
-    dependencies : [gstbase_dep, gstvideo_dep])
+    dependencies : [gstbase_dep, gstvideo_dep] + gl_winsys_deps)
 endif

meson_options.txt

@@ -2,3 +2,6 @@ option('use_orc', type : 'combo', choices : ['yes', 'no', 'auto'], value : 'auto
 option('with_gl_api', type : 'string', value : 'auto', description : 'A comma separated list of opengl APIs to enable building against. Supported values are opengl and gles2.')
 option('with_gl_platform', type : 'string', value : 'auto', description : 'A comma separated list of opengl platforms to enable building against. Supported values are glx, egl, cgl, wgl and eagl')
 option('with_gl_winsys', type : 'string', value : 'auto', description : 'A comma separated list of opengl windows systems to enable building against. Supported values are x11, wayland, win32, cocoa, and dispmanx')
+option('with_egl_module_name', type : 'string', value : '', description : 'The file to pass to g_module_open to open the libEGL.so library (default: libEGL.so)')
+option('with_opengl_module_name', type : 'string', value : '', description : 'The file to pass to g_module_open to open the libGL.so library (default: libGL.so)')
+option('with_gles2_module_name', type : 'string', value : '', description : 'The file to pass to g_module_open to open the libGLESv2.so library (default: libGLESv2.so)')