testsuite: Add memory test support for OpenGL up/downloads

Use a GL renderer to upload textures (and then optionally download them
via release() again). This way, we can test that the GL renderer
properly uploads textures to the right formats (not losing information
for HDR for example) and downloads them again.

testsuite/gdk/memorytexture.c

@@ -2,12 +2,20 @@
 
 #include "gsk/ngl/gsknglrenderer.h"
 
-#define N 50
+#define N 20
 
 static GskRenderer *gl_renderer = NULL;
 
 typedef struct _TextureBuilder TextureBuilder;
 
+typedef enum {
+  TEXTURE_METHOD_LOCAL,
+  TEXTURE_METHOD_GL,
+  TEXTURE_METHOD_GL_RELEASED,
+
+  N_TEXTURE_METHODS
+} TextureMethod;
+
 struct _TextureBuilder
 {
   GdkMemoryFormat format;
@@ -89,6 +97,26 @@ gdk_memory_format_has_alpha (GdkMemoryFormat format)
     }
 }
 
+static gpointer
+encode (GdkMemoryFormat format,
+        TextureMethod   method)
+{
+  return GSIZE_TO_POINTER (method * GDK_MEMORY_N_FORMATS + format);
+}
+
+static void
+decode (gconstpointer     data,
+        GdkMemoryFormat *format,
+        TextureMethod   *method)
+{
+  gsize value = GPOINTER_TO_SIZE (data);
+
+  *format = value % GDK_MEMORY_N_FORMATS;
+  value /= GDK_MEMORY_N_FORMATS;
+
+  *method = value;
+}
+        
 static void
 texture_builder_init (TextureBuilder  *builder,
                       GdkMemoryFormat  format,
@@ -325,18 +353,64 @@ compare_textures (GdkTexture *expected,
   g_free (test_data);
 }
 
+static GdkTexture *
+upload_to_gl (GdkTexture *texture)
+{
+  GskRenderNode *node;
+  GdkTexture *result;
+
+  if (gl_renderer == NULL)
+    return texture;
+
+  node = gsk_texture_node_new (texture,
+                               &GRAPHENE_RECT_INIT(
+                                 0, 0, 
+                                 gdk_texture_get_width (texture),
+                                 gdk_texture_get_height (texture)
+                               ));
+  result = gsk_renderer_render_texture (gl_renderer, node, NULL);
+  gsk_render_node_unref (node);
+  g_object_unref (texture);
+
+  return result;
+}
+
 static GdkTexture *
 create_texture (GdkMemoryFormat  format,
+                TextureMethod    method,
                 int              width,
                 int              height,
                 const GdkRGBA   *color)
 {
   TextureBuilder builder;
+  GdkTexture *texture;
 
   texture_builder_init (&builder, format, width, height);
   texture_builder_fill (&builder, color);
 
-  return texture_builder_finish (&builder);
+  texture = texture_builder_finish (&builder);
+
+  switch (method)
+  {
+    case TEXTURE_METHOD_LOCAL:
+      break;
+
+    case TEXTURE_METHOD_GL:
+      texture = upload_to_gl (texture);
+      break;
+
+    case TEXTURE_METHOD_GL_RELEASED:
+      texture = upload_to_gl (texture);
+      gdk_gl_texture_release (GDK_GL_TEXTURE (texture));
+      break;
+
+    case N_TEXTURE_METHODS:
+    default:
+      g_assert_not_reached ();
+      break;
+  }
+
+  return texture;
 }
 
 static void
@@ -350,19 +424,22 @@ create_random_color (GdkRGBA *color)
 }
 
 static void
-test_download_1x1 (gconstpointer format_)
+test_download_1x1 (gconstpointer data)
 {
-  GdkMemoryFormat format = GPOINTER_TO_SIZE (format_);
+  GdkMemoryFormat format;
+  TextureMethod method;
   GdkTexture *expected, *test;
   gsize i;
 
+  decode (data, &format, &method);
+
   for (i = 0; i < N; i++)
     {
       GdkRGBA color;
 
       create_random_color (&color);
-      expected = create_texture (GDK_MEMORY_DEFAULT, 1, 1, &color);
-      test = create_texture (format, 1, 1, &color);
+      expected = create_texture (GDK_MEMORY_DEFAULT, TEXTURE_METHOD_LOCAL, 1, 1, &color);
+      test = create_texture (format, method, 1, 1, &color);
       
       compare_textures (expected, test, gdk_memory_format_has_alpha (format));
 
@@ -372,19 +449,22 @@ test_download_1x1 (gconstpointer format_)
 }
 
 static void
-test_download_4x4 (gconstpointer format_)
+test_download_4x4 (gconstpointer data)
 {
-  GdkMemoryFormat format = GPOINTER_TO_SIZE (format_);
+  GdkMemoryFormat format;
+  TextureMethod method;
   GdkTexture *expected, *test;
   gsize i;
 
+  decode (data, &format, &method);
+
   for (i = 0; i < N; i++)
     {
       GdkRGBA color;
 
       create_random_color (&color);
-      expected = create_texture (GDK_MEMORY_DEFAULT, 4, 4, &color);
-      test = create_texture (format, 4, 4, &color);
+      expected = create_texture (GDK_MEMORY_DEFAULT, TEXTURE_METHOD_LOCAL, 4, 4, &color);
+      test = create_texture (format, method, 4, 4, &color);
       
       compare_textures (expected, test, gdk_memory_format_has_alpha (format));
 
@@ -398,19 +478,25 @@ add_test (const char    *name,
           GTestDataFunc  func)
 {
   GdkMemoryFormat format;
+  TextureMethod method;
   GEnumClass *enum_class;
 
   enum_class = g_type_class_ref (GDK_TYPE_MEMORY_FORMAT);
 
   for (format = 0; format < GDK_MEMORY_N_FORMATS; format++)
     {
-      char *test_name = g_strdup_printf ("%s/%s",
+      for (method = 0; method < N_TEXTURE_METHODS; method++)
+        {
+          const char *method_names[N_TEXTURE_METHODS] = { "local", "gl", "gl-released" };
+          char *test_name = g_strdup_printf ("%s/%s/%s",
                                              name,
-                                         g_enum_get_value (enum_class, format)->value_nick);
-      g_test_add_data_func_full (test_name, GSIZE_TO_POINTER (format), test_download_1x1, NULL);
+                                             g_enum_get_value (enum_class, format)->value_nick,
+                                             method_names[method]);
+          g_test_add_data_func_full (test_name, encode (format, method), test_download_1x1, NULL);
           g_free (test_name);
         }
     }
+}
 
 int
 main (int argc, char *argv[])
@@ -433,7 +519,11 @@ main (int argc, char *argv[])
 
   result = g_test_run ();
 
+  if (gl_renderer)
+    {
+      gsk_renderer_unrealize (gl_renderer);
       g_clear_object (&gl_renderer);
+    }
   g_clear_object (&surface);
 
   return result;