[gtk/matthiasc/color-profiles: 2/5] texture: Add hdr api

[Matthias Clasen <matthiasc src gnome org>]

commit 781a40f0045bca035ee4e9d95529a85acc4698e6
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 1 16:20:56 2021 -0400

    texture: Add hdr api
    
    Add private api to find out if a texture should be
    considered as HDR. For now, we consider float formats
    and >8bit formats to be HDR.

 gdk/gdkmemoryformat.c        | 14 ++++++++++++++
 gdk/gdkmemoryformatprivate.h |  1 +
 gdk/gdkmemorytexture.c       |  9 +++++++++
 gdk/gdktexture.c             | 14 ++++++++++++++
 gdk/gdktextureprivate.h      |  3 +++
 5 files changed, 41 insertions(+)
---
diff --git a/gdk/gdkmemoryformat.c b/gdk/gdkmemoryformat.c
index 97fde93b86..182b3f37db 100644
--- a/gdk/gdkmemoryformat.c
+++ b/gdk/gdkmemoryformat.c
@@ -691,6 +691,20 @@ gdk_memory_format_gl_format (GdkMemoryFormat  format,
   return TRUE;
 }
 
+gboolean
+gdk_memory_format_is_hdr (GdkMemoryFormat format)
+{
+  switch (memory_formats[format].gl.type)
+    {
+    case GL_FLOAT:
+    case GL_HALF_FLOAT:
+    case GL_UNSIGNED_SHORT:
+      return TRUE;
+    default:
+      return FALSE;
+    }
+}
+
 static void
 premultiply (float *rgba,
              gsize  n)
diff --git a/gdk/gdkmemoryformatprivate.h b/gdk/gdkmemoryformatprivate.h
index 348319c09b..fcaefd92b0 100644
--- a/gdk/gdkmemoryformatprivate.h
+++ b/gdk/gdkmemoryformatprivate.h
@@ -38,6 +38,7 @@ gboolean                gdk_memory_format_gl_format         (GdkMemoryFormat
                                                              guint                      *out_internal_format,
                                                              guint                      *out_format,
                                                              guint                      *out_type);
+gboolean                gdk_memory_format_is_hdr            (GdkMemoryFormat             format);
 
 void                    gdk_memory_convert                  (guchar                     *dest_data,
                                                              gsize                       dest_stride,
diff --git a/gdk/gdkmemorytexture.c b/gdk/gdkmemorytexture.c
index 4a5474bfe9..d436ed8969 100644
--- a/gdk/gdkmemorytexture.c
+++ b/gdk/gdkmemorytexture.c
@@ -101,6 +101,14 @@ gdk_memory_texture_download_float (GdkTexture *texture,
                       gdk_texture_get_height (texture));
 }
 
+static gboolean
+gdk_memory_texture_is_hdr (GdkTexture *texture)
+{
+  GdkMemoryTexture *self = GDK_MEMORY_TEXTURE (texture);
+
+  return gdk_memory_format_is_hdr (self->format);
+}
+
 static void
 gdk_memory_texture_class_init (GdkMemoryTextureClass *klass)
 {
@@ -110,6 +118,7 @@ gdk_memory_texture_class_init (GdkMemoryTextureClass *klass)
   texture_class->download_texture = gdk_memory_texture_download_texture;
   texture_class->download = gdk_memory_texture_download;
   texture_class->download_float = gdk_memory_texture_download_float;
+  texture_class->is_hdr = gdk_memory_texture_is_hdr;
   gobject_class->dispose = gdk_memory_texture_dispose;
 }
 
diff --git a/gdk/gdktexture.c b/gdk/gdktexture.c
index 03b55a7fb6..e314634fc2 100644
--- a/gdk/gdktexture.c
+++ b/gdk/gdktexture.c
@@ -325,6 +325,12 @@ gdk_texture_dispose (GObject *object)
   G_OBJECT_CLASS (gdk_texture_parent_class)->dispose (object);
 }
 
+static gboolean
+gdk_texture_real_is_hdr (GdkTexture *texture)
+{
+  return FALSE;
+}
+
 static void
 gdk_texture_class_init (GdkTextureClass *klass)
 {
@@ -333,6 +339,7 @@ gdk_texture_class_init (GdkTextureClass *klass)
   klass->download_texture = gdk_texture_real_download_texture;
   klass->download = gdk_texture_real_download;
   klass->download_float = gdk_texture_real_download_float;
+  klass->is_hdr = gdk_texture_real_is_hdr;
 
   gobject_class->set_property = gdk_texture_set_property;
   gobject_class->get_property = gdk_texture_get_property;
@@ -1087,3 +1094,10 @@ gdk_texture_save_to_tiff_bytes (GdkTexture *texture)
   return gdk_save_tiff (texture);
 }
 
+gboolean
+gdk_texture_is_hdr (GdkTexture *texture)
+{
+  g_return_val_if_fail (GDK_IS_TEXTURE (texture), FALSE);
+
+  return GDK_TEXTURE_GET_CLASS (texture)->is_hdr (texture);
+}
diff --git a/gdk/gdktextureprivate.h b/gdk/gdktextureprivate.h
index 5c451ec8c8..760ea15702 100644
--- a/gdk/gdktextureprivate.h
+++ b/gdk/gdktextureprivate.h
@@ -34,10 +34,13 @@ struct _GdkTextureClass {
   void                  (* download_float)              (GdkTexture             *texture,
                                                          float                  *data,
                                                          gsize                   stride);
+  gboolean              (* is_hdr)                      (GdkTexture             *texture);
 };
 
 gboolean                gdk_texture_can_load            (GBytes                 *bytes);
 
+gboolean                gdk_texture_is_hdr              (GdkTexture             *self);
+
 GdkTexture *            gdk_texture_new_for_surface     (cairo_surface_t        *surface);
 cairo_surface_t *       gdk_texture_download_surface    (GdkTexture             *texture,
                                                          GdkColorProfile        *color_profile);