gl: add and use gst_gl_internal_format_rgba

Previously when compiling GstGL with both GL and GLES2,
GL_RGBA8 was picked from GL/gl.h. But a clash may happen at
runtime when one is selecting GLES2.

gst_gl_internal_format_rgba allows to check at runtime
if it should use GL_RGBA or GL_RGBA8.

ext/gl/gstgleffects.c

@@ -285,10 +285,11 @@ gst_gl_effects_init_gl_resources (GstGLFilter * filter)
 
     gl->GenTextures (1, &effects->midtexture[i]);
     gl->BindTexture (GL_TEXTURE_2D, effects->midtexture[i]);
-    gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8,
+    gl->TexImage2D (GL_TEXTURE_2D, 0,
+        gst_gl_internal_format_rgba (GST_GL_BASE_FILTER (filter)->context),
         GST_VIDEO_INFO_WIDTH (&filter->out_info),
-        GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-        0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+        GST_VIDEO_INFO_HEIGHT (&filter->out_info), 0, GL_RGBA, GL_UNSIGNED_BYTE,
+        NULL);
     gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

ext/gl/gstglfiltershader.c

@@ -93,10 +93,11 @@ static void gst_gl_filtershader_hcallback (gint width, gint height,
 static void
 gst_gl_filtershader_init_resources (GstGLFilter * filter)
 {
-  glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8,
+  glTexImage2D (GL_TEXTURE_2D, 0,
+      gst_gl_internal_format_rgba (GST_GL_BASE_FILTER (filter)->context),
       GST_VIDEO_INFO_WIDTH (&filter->out_info),
-      GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-      0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+      GST_VIDEO_INFO_HEIGHT (&filter->out_info), 0, GL_RGBA, GL_UNSIGNED_BYTE,
+      NULL);
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

gst-libs/gst/gl/glprototypes/gstgl_gles2compat.h

@@ -31,7 +31,6 @@ G_BEGIN_DECLS
 //FIXME:
 #define GL_RGB16 GL_RGB565
 #define GL_RGB8 GL_RGB
-#define GL_RGBA8 GL_RGBA
 //END FIXME
 
 /* UNSUPPORTED */

gst-libs/gst/gl/gstglcolorconvert.c

@@ -1463,8 +1463,9 @@ _init_convert_fbo (GstGLColorConvert * convert)
   /* a fake texture is attached to the convert FBO (cannot init without it) */
   gl->GenTextures (1, &fake_texture);
   gl->BindTexture (GL_TEXTURE_2D, fake_texture);
-  gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8, out_width, out_height,
-      0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+  gl->TexImage2D (GL_TEXTURE_2D, 0,
+      gst_gl_internal_format_rgba (convert->context), out_width, out_height, 0,
+      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

gst-libs/gst/gl/gstglframebuffer.c

@@ -125,8 +125,9 @@ gst_gl_framebuffer_generate (GstGLFramebuffer * frame, gint width, gint height,
   /* setup a texture to render to */
   gl->GenTextures (1, &fake_texture);
   gl->BindTexture (GL_TEXTURE_2D, fake_texture);
-  gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8,
-      width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+  gl->TexImage2D (GL_TEXTURE_2D, 0,
+      gst_gl_internal_format_rgba (frame->context), width, height, 0, GL_RGBA,
+      GL_UNSIGNED_BYTE, NULL);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

gst-libs/gst/gl/gstglmemory.c

@@ -303,7 +303,7 @@ _sized_gl_format_from_gl_format_type (GstGLContext * context, GLenum format,
     case GL_RGBA:
       switch (type) {
         case GL_UNSIGNED_BYTE:
-          return GL_RGBA8;
+          return gst_gl_internal_format_rgba (context);
           break;
       }
       break;

gst-libs/gst/gl/gstglutils.c

@@ -113,8 +113,8 @@ _gen_texture (GstGLContext * context, GenTexture * data)
   gl->BindTexture (GL_TEXTURE_2D, data->result);
 
   if (data->width > 0 && data->height > 0)
-    gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8, data->width,
-        data->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    gl->TexImage2D (GL_TEXTURE_2D, 0, gst_gl_internal_format_rgba (context),
+        data->width, data->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -193,7 +193,7 @@ _gen_texture_full (GstGLContext * context, GenTextureFull * data)
     case GST_VIDEO_FORMAT_xBGR:
     case GST_VIDEO_FORMAT_AYUV:
     {
-      glinternalformat = GL_RGBA8;
+      glinternalformat = gst_gl_internal_format_rgba (context);
       glformat = GL_RGBA;
       gltype = GL_UNSIGNED_BYTE;
       break;
@@ -904,3 +904,15 @@ gst_gl_caps_replace_all_caps_features (const GstCaps * caps,
 
   return tmp;
 }
+
+GLint
+gst_gl_internal_format_rgba (GstGLContext * context)
+{
+#if GST_GL_HAVE_GLES2 && (GST_GL_HAVE_OPENGL || GST_GL_HAVE_GLES3)
+  return USING_GLES2 (context) ? GL_RGBA : GL_RGBA8;
+#elif GST_GL_HAVE_OPENGL || GST_GL_HAVE_GLES3
+  return GL_RGBA8;
+#else
+  return GL_RGBA;
+#endif
+}

gst-libs/gst/gl/gstglutils.h

@@ -105,6 +105,7 @@ gsize gst_gl_get_plane_data_size (GstVideoInfo * info, GstVideoAlignment * align
     guint plane);
 GstCaps * gst_gl_caps_replace_all_caps_features (const GstCaps * caps,
     const gchar * feature_name);
+GLint gst_gl_internal_format_rgba (GstGLContext * context);
 
 G_END_DECLS