[gtk+/wip/ebassi/gsk-renderer: 461/545] gsk: Rework surface -> texture API

[Emmanuele Bassi <ebassi src gnome org>]

commit b4fdd3f422eb894812d119aa9a4202eca5675dfe
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jul 19 14:32:17 2016 +0100

    gsk: Rework surface -> texture API
    
    Drop the texture parameters handling from the texture creation, and
    associate them with the contents upload. Also, rename the function to
    something more in line with what it does.

 gsk/gskgldriver.c        |   27 ++++++++++++++++++---------
 gsk/gskgldriverprivate.h |   10 +++++-----
 gsk/gskglrenderer.c      |   10 +++++-----
 3 files changed, 28 insertions(+), 19 deletions(-)
---
diff --git a/gsk/gskgldriver.c b/gsk/gskgldriver.c
index 01caa00..634cb54 100644
--- a/gsk/gskgldriver.c
+++ b/gsk/gskgldriver.c
@@ -243,9 +243,7 @@ gsk_gl_driver_get_vao (GskGLDriver *driver,
 int
 gsk_gl_driver_create_texture (GskGLDriver     *driver,
                               int              width,
-                              int              height,
-                              int              min_filter,
-                              int              mag_filter)
+                              int              height)
 {
   guint texture_id;
   Texture *t;
@@ -257,15 +255,15 @@ gsk_gl_driver_create_texture (GskGLDriver     *driver,
 
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
-  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter);
+  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 
   t = texture_new ();
   t->texture_id = texture_id;
   t->width = width;
   t->height = height;
-  t->min_filter = min_filter;
-  t->mag_filter = mag_filter;
+  t->min_filter = GL_NEAREST;
+  t->mag_filter = GL_NEAREST;
   g_hash_table_insert (driver->textures, GUINT_TO_POINTER (texture_id), t);
 
   return texture_id;
@@ -441,9 +439,11 @@ gsk_gl_driver_bind_render_target (GskGLDriver *driver,
 }
 
 void
-gsk_gl_driver_render_surface_to_texture (GskGLDriver     *driver,
+gsk_gl_driver_init_texture_with_surface (GskGLDriver     *driver,
+                                         int              texture_id,
                                          cairo_surface_t *surface,
-                                         int              texture_id)
+                                         int              min_filter,
+                                         int              mag_filter)
 {
   Texture *t;
 
@@ -455,8 +455,17 @@ gsk_gl_driver_render_surface_to_texture (GskGLDriver     *driver,
 
   glBindTexture (GL_TEXTURE_2D, t->texture_id);
 
+  if (min_filter != t->min_filter)
+    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
+
+  if (mag_filter != t->mag_filter)
+    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter);
+
   gdk_cairo_surface_upload_to_gl (surface, GL_TEXTURE_2D, t->width, t->height, NULL);
 
+  t->min_filter = min_filter;
+  t->mag_filter = mag_filter;
+
   if (t->min_filter != GL_NEAREST)
     glGenerateMipmap (GL_TEXTURE_2D);
 }
diff --git a/gsk/gskgldriverprivate.h b/gsk/gskgldriverprivate.h
index d5ddf46..27d7966 100644
--- a/gsk/gskgldriverprivate.h
+++ b/gsk/gskgldriverprivate.h
@@ -23,9 +23,7 @@ void            gsk_gl_driver_end_frame                 (GskGLDriver     *driver
 
 int             gsk_gl_driver_create_texture            (GskGLDriver     *driver,
                                                          int              width,
-                                                         int              height,
-                                                         int              min_filter,
-                                                         int              mag_filter);
+                                                         int              height);
 int             gsk_gl_driver_create_vao_for_quad       (GskGLDriver     *driver,
                                                          int              position_id,
                                                          int              uv_id,
@@ -41,9 +39,11 @@ void            gsk_gl_driver_bind_mask_texture         (GskGLDriver     *driver
 void            gsk_gl_driver_bind_vao                  (GskGLDriver     *driver,
                                                          int              vao_id);
 
-void            gsk_gl_driver_render_surface_to_texture (GskGLDriver     *driver,
+void            gsk_gl_driver_init_texture_with_surface (GskGLDriver     *driver,
+                                                         int              texture_id,
                                                          cairo_surface_t *surface,
-                                                         int              texture_id);
+                                                         int              min_filter,
+                                                         int              mag_filter);
 
 G_END_DECLS
 
diff --git a/gsk/gskglrenderer.c b/gsk/gskglrenderer.c
index 2ada400..8e0bc2c 100644
--- a/gsk/gskglrenderer.c
+++ b/gsk/gskglrenderer.c
@@ -720,12 +720,12 @@ gsk_gl_renderer_add_render_item (GskGLRenderer *self,
   /* Upload the Cairo surface to a GL texture */
   item.render_data.texture_id = gsk_gl_driver_create_texture (self->gl_driver,
                                                               bounds.size.width,
-                                                              bounds.size.height,
-                                                              self->gl_min_filter,
-                                                              self->gl_mag_filter);
-  gsk_gl_driver_render_surface_to_texture (self->gl_driver,
+                                                              bounds.size.height);
+  gsk_gl_driver_init_texture_with_surface (self->gl_driver,
+                                           item.render_data.texture_id,
                                            surface,
-                                           item.render_data.texture_id);
+                                           self->gl_min_filter,
+                                           self->gl_mag_filter);
 
   GSK_NOTE (OPENGL, g_print ("Adding node <%s>[%p] to render items\n",
                              node->name != NULL ? node->name : "unnamed",