Cleanup checker shader code.
[geeqie.git] / src / renderer-clutter.c
index 0ec6746..7b237b9 100644 (file)
@@ -29,6 +29,7 @@
 
 /* for 3d texture */
 #define COGL_ENABLE_EXPERIMENTAL_API
+#define CLUTTER_ENABLE_EXPERIMENTAL_API
 
 #include <clutter/clutter.h>
 
@@ -88,23 +89,24 @@ struct _RendererClutter
        RendererFuncs f;
        PixbufRenderer *pr;
 
-       
+
        gint stereo_mode;
        gint stereo_off_x;
        gint stereo_off_y;
-       
-       
+
+
        GList *pending_updates;
        gint idle_update;
-       
+
        GList *overlay_list;
-       
+
        GtkWidget *widget; /* widget and stage may be shared with other renderers */
        ClutterActor *stage;
        ClutterActor *texture;
        ClutterActor *group;
-       
+
        gboolean clut_updated;
+       gint64 last_pixbuf_change;
 };
 
 typedef struct _RendererClutterAreaParam RendererClutterAreaParam;
@@ -116,63 +118,83 @@ struct _RendererClutterAreaParam {
        gint h;
 };
 
+typedef struct _RendererClutterShaderInfo RendererClutterShaderInfo;
+struct _RendererClutterShaderInfo {
+       float checkersize;
+       float checkercolor0[3];
+       float checkercolor1[3];
+};
+
 #define CLUT_SIZE      32
 
-static void rc_set_shader(CoglHandle material)
+static void rc_set_shader(CoglHandle material, const RendererClutterShaderInfo *shaderInfo)
 {
-  CoglHandle shader;
-  CoglHandle program;
-  gint uniform_no;
-  shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
-  cogl_shader_source (shader,
-  "vec3 checker(vec2 texc, vec3 color0, vec3 color1)                                           \n"
-  "{                                                                                           \n"
-  "  if (mod(int(floor(texc.x) + floor(texc.y)), 2) == 0)                                      \n"
-  "    return color0;                                                                          \n"
-  "  else                                                                                      \n"
-  "    return color1;                                                                          \n"
-  "}                                                                                           \n"
-  "                                                                                            \n"
-  "uniform sampler2D tex;                                                                      \n"
-  "uniform sampler3D clut;                                                                     \n"
-  "uniform float scale;                                                                                \n"
-  "uniform float offset;                                                                       \n"
-  "                                                                                            \n"
-  "void main(void)                                                                             \n"
-  "{                                                                                           \n"
-  "    vec3 bg = checker(gl_FragCoord.xy / 16, vec3(0.6, 0.6, 0.6), vec3(0.4, 0.4, 0.4));      \n"
-  "    vec4 img4 = texture2D(tex, gl_TexCoord[0].xy);                                          \n"
-  "    vec3 img3 = img4.rgb;                                                                   \n"
-  "    img3 = img3 * scale + offset;                                                           \n"
-  "    img3 = texture3D(clut, img3);                                                           \n"
-  "                                                                                            \n"
-  "    gl_FragColor = vec4(img3 * img4.a + bg * (1.0 - img4.a), 1.0);                          \n"
-  "}                                                                                           \n"
-  );
-  cogl_shader_compile(shader);
-  gchar *err = cogl_shader_get_info_log(shader);
-  printf("%s\n",err);
-  g_free(err);
-
-  program = cogl_create_program ();
-  cogl_program_attach_shader (program, shader);
-  cogl_handle_unref (shader);
-  cogl_program_link (program);
-
-  uniform_no = cogl_program_get_uniform_location (program, "tex");
-  cogl_program_set_uniform_1i (program, uniform_no, 0);
-
-  uniform_no = cogl_program_get_uniform_location (program, "clut");
-  cogl_program_set_uniform_1i (program, uniform_no, 1);
-
-  uniform_no = cogl_program_get_uniform_location (program, "scale");
-  cogl_program_set_uniform_1f (program, uniform_no, (double) (CLUT_SIZE - 1) / CLUT_SIZE);
-
-  uniform_no = cogl_program_get_uniform_location (program, "offset");
-  cogl_program_set_uniform_1f (program, uniform_no, 1.0 / (2 * CLUT_SIZE));
-
-  cogl_material_set_user_program (material, program);
-  cogl_handle_unref (program);
+       CoglHandle shader;
+       CoglHandle program;
+       gint uniform_no;
+
+       shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT);
+       cogl_shader_source (shader,
+       "vec3 checker(vec2 texc, vec3 color0, vec3 color1)                                              \n"
+       "{                                                                                                                                              \n"
+       "  if (mod(floor(texc.x) + floor(texc.y), 2.0) == 0.0)                                  \n"
+       "    return color0;                                                                                                             \n"
+       "  else                                                                                                                                 \n"
+       "    return color1;                                                                                                             \n"
+       "}                                                                                                                                              \n"
+       "                                                                                                                                               \n"
+       "uniform sampler2D tex;                                                                                                 \n"
+       "uniform sampler3D clut;                                                                                                \n"
+       "uniform float scale;                                                                                                   \n"
+       "uniform float offset;                                                                                                  \n"
+       "uniform float checkersize;                                                                                             \n"
+       "uniform vec3 color0;                                                                                                   \n"
+       "uniform vec3 color1;                                                                                                   \n"
+       "                                                                                                                                               \n"
+       "void main(void)                                                                                                                \n"
+       "{                                                                                                                                              \n"
+       "    vec3 bg = checker(gl_FragCoord.xy / checkersize, color0, color1);  \n"
+       "    vec4 img4 = texture2D(tex, gl_TexCoord[0].xy);                                             \n"
+       "    vec3 img3 = img4.bgr;                                                                                              \n"
+       "    img3 = img3 * scale + offset;                                                                              \n"
+       "    img3 = texture3D(clut, img3).rgb;                                                                  \n"
+       "                                                                                                                                               \n"
+       "    gl_FragColor = vec4(img3 * img4.a + bg * (1.0 - img4.a), 1.0);             \n"
+       "}                                                                                                                                              \n"
+       );
+       cogl_shader_compile(shader);
+       gchar *err = cogl_shader_get_info_log(shader);
+       DEBUG_0("%s\n",err);
+       g_free(err);
+
+       program = cogl_create_program ();
+       cogl_program_attach_shader (program, shader);
+       cogl_handle_unref (shader);
+       cogl_program_link (program);
+
+       uniform_no = cogl_program_get_uniform_location (program, "tex");
+       cogl_program_set_uniform_1i (program, uniform_no, 0);
+
+       uniform_no = cogl_program_get_uniform_location (program, "clut");
+       cogl_program_set_uniform_1i (program, uniform_no, 1);
+
+       uniform_no = cogl_program_get_uniform_location (program, "scale");
+       cogl_program_set_uniform_1f (program, uniform_no, (double) (CLUT_SIZE - 1) / CLUT_SIZE);
+
+       uniform_no = cogl_program_get_uniform_location (program, "offset");
+       cogl_program_set_uniform_1f (program, uniform_no, 1.0 / (2 * CLUT_SIZE));
+
+       uniform_no = cogl_program_get_uniform_location (program, "checkersize");
+       cogl_program_set_uniform_1f (program, uniform_no, shaderInfo->checkersize);
+
+       uniform_no = cogl_program_get_uniform_location (program, "color0");
+       cogl_program_set_uniform_float (program, uniform_no, 3, 1, shaderInfo->checkercolor0);
+
+       uniform_no = cogl_program_get_uniform_location (program, "color1");
+       cogl_program_set_uniform_float (program, uniform_no, 3, 1, shaderInfo->checkercolor1);
+
+       cogl_material_set_user_program (material, program);
+       cogl_handle_unref (program);
 }
 
 
@@ -184,14 +206,14 @@ static void rc_prepare_post_process_lut(RendererClutter *rc)
        GdkPixbuf *tmp_pixbuf;
        CoglHandle material;
        CoglHandle tex3d;
-       
+
        DEBUG_0("%s clut start", get_exec_time());
 
-       for (r = 0; r < CLUT_SIZE; r++) 
+       for (r = 0; r < CLUT_SIZE; r++)
                {
-               for (g = 0; g < CLUT_SIZE; g++) 
+               for (g = 0; g < CLUT_SIZE; g++)
                        {
-                       for (b = 0; b < CLUT_SIZE; b++) 
+                       for (b = 0; b < CLUT_SIZE; b++)
                                {
                                guchar *ptr = clut + ((b * CLUT_SIZE + g) * CLUT_SIZE + r) * 3;
                                ptr[0] = floor ((double) r / (CLUT_SIZE - 1) * 255.0 + 0.5);
@@ -212,7 +234,20 @@ static void rc_prepare_post_process_lut(RendererClutter *rc)
        g_object_unref(tmp_pixbuf);
 
        DEBUG_0("%s clut upload start", get_exec_time());
-       
+#if CLUTTER_CHECK_VERSION(1,10,0)
+       {
+       CoglContext *ctx = clutter_backend_get_cogl_context(clutter_get_default_backend ());
+
+       tex3d = cogl_texture_3d_new_from_data(ctx,
+                                             CLUT_SIZE, CLUT_SIZE, CLUT_SIZE,
+                                             COGL_PIXEL_FORMAT_RGB_888,
+                                             COGL_PIXEL_FORMAT_RGB_888,
+                                             CLUT_SIZE * 3,
+                                             CLUT_SIZE * CLUT_SIZE * 3,
+                                             clut,
+                                             NULL);
+       }
+#else
        tex3d = cogl_texture_3d_new_from_data(CLUT_SIZE, CLUT_SIZE, CLUT_SIZE,
                                              COGL_TEXTURE_NONE,
                                              COGL_PIXEL_FORMAT_RGB_888,
@@ -221,7 +256,8 @@ static void rc_prepare_post_process_lut(RendererClutter *rc)
                                              CLUT_SIZE * CLUT_SIZE * 3,
                                              clut,
                                              NULL);
-       material = clutter_texture_get_cogl_material(rc->texture);
+#endif
+       material = clutter_texture_get_cogl_material(CLUTTER_TEXTURE(rc->texture));
        cogl_material_set_layer(material, 1, tex3d);
        cogl_handle_unref(tex3d);
        DEBUG_0("%s clut end", get_exec_time());
@@ -235,162 +271,144 @@ static void rc_sync_actor(RendererClutter *rc)
        PixbufRenderer *pr = rc->pr;
        gint anchor_x = 0;
        gint anchor_y = 0;
-       
+       gint rot_z = 0;
+       gint rot_y = 0;
+
        clutter_actor_set_anchor_point(CLUTTER_ACTOR(rc->texture), 0, 0);
 
-       printf("scale %d %d\n", rc->pr->width, rc->pr->height);
-       printf("pos   %d %d\n", rc->pr->x_offset, rc->pr->y_offset);
-       
-       clutter_actor_set_scale(CLUTTER_ACTOR(rc->texture), 
+       DEBUG_0("scale %d %d", rc->pr->width, rc->pr->height);
+       DEBUG_0("pos   %d %d", rc->pr->x_offset, rc->pr->y_offset);
+
+       clutter_actor_set_scale(CLUTTER_ACTOR(rc->texture),
                                (gfloat)pr->width / pr->image_width,
                                (gfloat)pr->height / pr->image_height);
-                               
+
        switch (pr->orientation)
                {
                case EXIF_ORIENTATION_TOP_LEFT:
-                       /* normal  */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               0, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               0, 0, 0, 0);
-                       anchor_x = 0;
-                       anchor_y = 0;
+                       /* 1 - Horizontal (normal)  */
                        break;
                case EXIF_ORIENTATION_TOP_RIGHT:
-                       /* mirrored */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               0, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               180, 0, 0, 0);
+                       /* 2 - Mirror horizontal */
+                       rot_y = 180;
                        anchor_x = pr->width;
-                       anchor_y = 0;
                        break;
                case EXIF_ORIENTATION_BOTTOM_RIGHT:
-                       /* upside down */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               180, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               0, 0, 0, 0);
+                       /* 3 - Rotate 180 */
+                       rot_z = 180;
                        anchor_x = pr->width;
                        anchor_y = pr->height;
                        break;
                case EXIF_ORIENTATION_BOTTOM_LEFT:
-                       /* flipped */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               180, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               180, 0, 0, 0);
-                       anchor_x = 0;
+                       /* 4 - Mirror vertical */
+                       rot_z = 180;
+                       rot_y = 180;
                        anchor_y = pr->height;
                        break;
                case EXIF_ORIENTATION_LEFT_TOP:
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               -90, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               180, 0, 0, 0);
-                       anchor_x = 0;
-                       anchor_y = 0;
+                       /* 5 - Mirror horizontal and rotate 270 CW */
+                       rot_z = 270;
+                       rot_y = 180;
                        break;
                case EXIF_ORIENTATION_RIGHT_TOP:
-                       /* rotated -90 (270) */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               -90, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               0, 0, 0, 0);
-                       anchor_x = 0;
-                       anchor_y = pr->height;
+                       /* 6 - Rotate 90 CW */
+                       rot_z = 90;
+                       anchor_x = pr->width;
                        break;
                case EXIF_ORIENTATION_RIGHT_BOTTOM:
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               90, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               180, 0, 0, 0);
+                       /* 7 - Mirror horizontal and rotate 90 CW */
+                       rot_z = 90;
+                       rot_y = 180;
                        anchor_x = pr->width;
                        anchor_y = pr->height;
                        break;
                case EXIF_ORIENTATION_LEFT_BOTTOM:
-                       /* rotated 90 */
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Z_AXIS,
-                                               90, 0, 0, 0);
-                       clutter_actor_set_rotation(CLUTTER_ACTOR(rc->texture),
-                                               CLUTTER_Y_AXIS,
-                                               0, 0, 0, 0);
-                       anchor_x = pr->width;
-                       anchor_y = 0;
+                       /* 8 - Rotate 270 CW */
+                       rot_z = 270;
+                       anchor_y = pr->height;
                        break;
                default:
                        /* The other values are out of range */
                        break;
                }
-       
-       clutter_actor_set_position(CLUTTER_ACTOR(rc->texture), 
-                               pr->x_offset - pr->x_scroll + anchor_x, 
+
+       clutter_actor_set_rotation(     CLUTTER_ACTOR(rc->texture),
+                                                               CLUTTER_Z_AXIS,
+                                                               rot_z, 0, 0, 0);
+       clutter_actor_set_rotation(     CLUTTER_ACTOR(rc->texture),
+                                                               CLUTTER_Y_AXIS,
+                                                               rot_y, 0, 0, 0);
+
+       clutter_actor_set_position(CLUTTER_ACTOR(rc->texture),
+                               pr->x_offset - pr->x_scroll + anchor_x,
                                pr->y_offset - pr->y_scroll + anchor_y);
 
 }
 
 
-static void renderer_area_clip_add(RendererClutter *rc, gfloat x, gfloat y, gfloat w, gfloat h)
+static void rc_area_clip_add(RendererClutter *rc, gfloat x, gfloat y, gfloat w, gfloat h)
 {
-       PixbufRenderer *pr = rc->pr;
        gfloat x2, y2;
        gfloat clip_x, clip_y, clip_w, clip_h, clip_x2, clip_y2;
-       
+
        x2 = x + w;
        y2 = y + h;
-       
+
        clutter_actor_get_clip(rc->texture, &clip_x, &clip_y, &clip_w, &clip_h);
-       
+
        clip_x2 = clip_x + clip_w;
        clip_y2 = clip_y + clip_h;
-       
+
        if (clip_x > x) clip_x = x;
        if (clip_x2 < x2) clip_x2 = x2;
        if (clip_y > y) clip_y = y;
        if (clip_y2 < y2) clip_y2 = y2;
-       
+
        clip_w = clip_x2 - clip_x;
        clip_h = clip_y2 - clip_y;
-       
-       printf("clip %f %f %f %f\n", clip_x, clip_y, clip_w, clip_h);
+
        clutter_actor_set_clip(rc->texture, clip_x, clip_y, clip_w, clip_h);
 }
 
 #define MAX_REGION_AREA (32768 * 1024)
 
-static gboolean renderer_area_changed_cb(gpointer data)
+static gboolean rc_area_changed_cb(gpointer data);
+
+static void rc_schedule_texture_upload(RendererClutter *rc)
+{
+       if (g_get_monotonic_time() - rc->last_pixbuf_change < 50000)
+               {
+               /* delay clutter redraw until the texture has some data
+                  set priority between gtk redraw and clutter redraw */
+               DEBUG_0("%s tex upload high prio", get_exec_time());
+               rc->idle_update = g_idle_add_full(CLUTTER_PRIORITY_REDRAW - 10, rc_area_changed_cb, rc, NULL);
+               }
+       else
+               {
+               /* higher prio than histogram */
+               DEBUG_0("%s tex upload low prio", get_exec_time());
+
+               rc->idle_update = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE - 5, rc_area_changed_cb, rc, NULL);
+               }
+}
+
+static gboolean rc_area_changed_cb(gpointer data)
 {
        RendererClutter *rc = (RendererClutter *)data;
        PixbufRenderer *pr = rc->pr;
-       
+
        RendererClutterAreaParam *par = rc->pending_updates->data;
-       
+
        gint h = MAX_REGION_AREA / par->w;
        if (h == 0) h = 1;
        if (h > par->h) h = par->h;
-       
-       
-       printf("renderer_area_changed_cb %d %d %d %d  (%d)\n", par->x, par->y, par->w, h, par->h);
+
+
        DEBUG_0("%s upload start", get_exec_time());
        if (pr->pixbuf)
                {
                CoglHandle texture = clutter_texture_get_cogl_texture(CLUTTER_TEXTURE(rc->texture));
-               
+
                cogl_texture_set_region(texture,
                                        par->x + GET_RIGHT_PIXBUF_OFFSET(rc),
                                        par->y,
@@ -400,17 +418,17 @@ static gboolean renderer_area_changed_cb(gpointer data)
                                        h,
                                        par->w,
                                        h,
-                                       gdk_pixbuf_get_has_alpha(pr->pixbuf) ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
+                                       gdk_pixbuf_get_has_alpha(pr->pixbuf) ? COGL_PIXEL_FORMAT_BGRA_8888 : COGL_PIXEL_FORMAT_BGR_888,
                                        gdk_pixbuf_get_rowstride(pr->pixbuf),
                                        gdk_pixbuf_get_pixels(pr->pixbuf));
                }
        DEBUG_0("%s upload end", get_exec_time());
-       renderer_area_clip_add(rc, par->x, par->y, par->w, h);
+       rc_area_clip_add(rc, par->x, par->y, par->w, h);
+
 
-               
        par->y += h;
        par->h -= h;
-       
+
        if (par->h == 0)
                {
                rc->pending_updates = g_list_remove(rc->pending_updates, par);
@@ -426,11 +444,14 @@ static gboolean renderer_area_changed_cb(gpointer data)
 
                return FALSE;
                }
-       return TRUE;
+
+       rc_schedule_texture_upload(rc);
+
+       return FALSE; /* it was rescheduled, possibly with different prio */
 }
 
 
-static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint src_w, gint src_h)
+static void rc_area_changed(void *renderer, gint src_x, gint src_y, gint src_w, gint src_h)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
        PixbufRenderer *pr = rc->pr;
@@ -438,16 +459,16 @@ static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint s
 
        gint width = gdk_pixbuf_get_width(pr->pixbuf);
        gint height = gdk_pixbuf_get_height(pr->pixbuf);
-               
-       if (pr->stereo_data == STEREO_PIXBUF_SBS || pr->stereo_data == STEREO_PIXBUF_CROSS) 
+
+       if (pr->stereo_data == STEREO_PIXBUF_SBS || pr->stereo_data == STEREO_PIXBUF_CROSS)
                        {
                        width /= 2;
                        }
-       
+
        if (!pr_clip_region(src_x, src_y, src_w, src_h,
                             GET_RIGHT_PIXBUF_OFFSET(rc), 0, width, height,
                             &src_x, &src_y, &src_w, &src_h)) return;
-       
+
        par = g_new0(RendererClutterAreaParam, 1);
        par->rc = rc;
        par->x = src_x - GET_RIGHT_PIXBUF_OFFSET(rc);
@@ -455,13 +476,13 @@ static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint s
        par->w = src_w;
        par->h = src_h;
        rc->pending_updates = g_list_append(rc->pending_updates, par);
-       if (!rc->idle_update) 
+       if (!rc->idle_update)
                {
-               rc->idle_update = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, renderer_area_changed_cb, rc, NULL);
+               rc_schedule_texture_upload(rc);
                }
 }
 
-static void renderer_remove_pending_updates(RendererClutter *rc)
+static void rc_remove_pending_updates(RendererClutter *rc)
 {
        if (rc->idle_update) g_idle_remove_by_data(rc);
        rc->idle_update = 0;
@@ -473,37 +494,42 @@ static void renderer_remove_pending_updates(RendererClutter *rc)
                }
 }
 
-static void renderer_update_pixbuf(void *renderer, gboolean lazy)
+static void rc_update_pixbuf(void *renderer, gboolean lazy)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
        PixbufRenderer *pr = rc->pr;
-       
-       renderer_remove_pending_updates(rc);
-       
+
+       DEBUG_0("rc_update_pixbuf");
+
+       rc_remove_pending_updates(rc);
+
+       rc->last_pixbuf_change = g_get_monotonic_time();
+       DEBUG_0("%s change time reset", get_exec_time());
+
        if (pr->pixbuf)
                {
                gint width = gdk_pixbuf_get_width(pr->pixbuf);
                gint height = gdk_pixbuf_get_height(pr->pixbuf);
-               
+
+               DEBUG_0("pixbuf size %d x %d (%d)", width, height, gdk_pixbuf_get_has_alpha(pr->pixbuf) ? 32 : 24);
+
                gint prev_width, prev_height;
-               
-               if (pr->stereo_data == STEREO_PIXBUF_SBS || pr->stereo_data == STEREO_PIXBUF_CROSS) 
+
+               if (pr->stereo_data == STEREO_PIXBUF_SBS || pr->stereo_data == STEREO_PIXBUF_CROSS)
                        {
                        width /= 2;
                        }
 
-               
-               printf("renderer_update_pixbuf\n");
+
                clutter_texture_get_base_size(CLUTTER_TEXTURE(rc->texture), &prev_width, &prev_height);
-               printf("change from %d %d to %d %d\n", prev_width, prev_height, width, height);
-               
+
                if (width != prev_width || height != prev_height)
                        {
                        /* FIXME use CoglMaterial with multiple textures for background, color management, anaglyph, ... */
                        CoglHandle texture = cogl_texture_new_with_size(width,
                                                                        height,
-                                                                       COGL_TEXTURE_NO_AUTO_MIPMAP,
-                                                                       gdk_pixbuf_get_has_alpha(pr->pixbuf) ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888);
+                                                                       COGL_TEXTURE_NO_AUTO_MIPMAP | COGL_TEXTURE_NO_SLICING,
+                                                                       gdk_pixbuf_get_has_alpha(pr->pixbuf) ? COGL_PIXEL_FORMAT_BGRA_8888 : COGL_PIXEL_FORMAT_BGR_888);
 
                        if (texture != COGL_INVALID_HANDLE)
                                {
@@ -514,27 +540,24 @@ static void renderer_update_pixbuf(void *renderer, gboolean lazy)
                clutter_actor_set_clip(rc->texture, 0, 0, 0, 0); /* visible area is extended as area_changed events arrive */
                if (!lazy)
                        {
-                       renderer_area_changed(renderer, GET_RIGHT_PIXBUF_OFFSET(rc), 0, width, height);
+                       rc_area_changed(renderer, GET_RIGHT_PIXBUF_OFFSET(rc), 0, width, height);
                        }
                }
 
        rc->clut_updated = FALSE;
-       printf("renderer_update_pixbuf\n");
-       rc_sync_actor(rc);
 }
 
 
 
-static void renderer_update_zoom(void *renderer, gboolean lazy)
+static void rc_update_zoom(void *renderer, gboolean lazy)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
-       PixbufRenderer *pr = rc->pr;
 
-       printf("renderer_update_zoom\n");
+       DEBUG_0("rc_update_zoom");
        rc_sync_actor(rc);
 }
 
-static void renderer_invalidate_region(void *renderer, gint x, gint y, gint w, gint h)
+static void rc_invalidate_region(void *renderer, gint x, gint y, gint w, gint h)
 {
 }
 
@@ -614,12 +637,7 @@ static void rc_overlay_free_all(RendererClutter *rc)
                }
 }
 
-
-static void renderer_overlay_draw(void *renderer, gint x, gint y, gint w, gint h)
-{
-}
-
-static gint renderer_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint y, OverlayRendererFlags flags)
+static gint rc_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint y, OverlayRendererFlags flags)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
        PixbufRenderer *pr = rc->pr;
@@ -639,10 +657,10 @@ static gint renderer_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint
        od->x = x;
        od->y = y;
        od->flags = flags;
-       
+
        od->actor = gtk_clutter_texture_new();
        g_signal_connect (od->actor, "destroy", G_CALLBACK(rc_overlay_actor_destroy_cb), od);
-       
+
        gtk_clutter_texture_set_from_pixbuf(GTK_CLUTTER_TEXTURE (od->actor), pixbuf, NULL);
        clutter_container_add_actor(CLUTTER_CONTAINER(rc->group), od->actor);
 
@@ -652,7 +670,7 @@ static gint renderer_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint
        return od->id;
 }
 
-static void renderer_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint x, gint y)
+static void rc_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint x, gint y)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
        PixbufRenderer *pr = rc->pr;
@@ -681,7 +699,7 @@ static void renderer_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gin
                }
 }
 
-static gboolean renderer_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
+static gboolean rc_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
 
@@ -701,25 +719,25 @@ static gboolean renderer_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf
 }
 
 
-static void renderer_update_sizes(void *renderer)
+static void rc_update_viewport(void *renderer)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
-       ClutterColor stage_color = { 0x00, 0x00, 0x00, 0xff }; 
+       ClutterColor stage_color = { 0x00, 0x00, 0x00, 0xff };
 
        rc->stereo_off_x = 0;
        rc->stereo_off_y = 0;
-       
-       if (rc->stereo_mode & PR_STEREO_RIGHT) 
+
+       if (rc->stereo_mode & PR_STEREO_RIGHT)
                {
-               if (rc->stereo_mode & PR_STEREO_HORIZ) 
+               if (rc->stereo_mode & PR_STEREO_HORIZ)
                        {
                        rc->stereo_off_x = rc->pr->viewport_width;
                        }
-               else if (rc->stereo_mode & PR_STEREO_VERT) 
+               else if (rc->stereo_mode & PR_STEREO_VERT)
                        {
                        rc->stereo_off_y = rc->pr->viewport_height;
                        }
-               else if (rc->stereo_mode & PR_STEREO_FIXED) 
+               else if (rc->stereo_mode & PR_STEREO_FIXED)
                        {
                        rc->stereo_off_x = rc->pr->stereo_fixed_x_right;
                        rc->stereo_off_y = rc->pr->stereo_fixed_y_right;
@@ -727,25 +745,23 @@ static void renderer_update_sizes(void *renderer)
                }
        else
                {
-               if (rc->stereo_mode & PR_STEREO_FIXED) 
+               if (rc->stereo_mode & PR_STEREO_FIXED)
                        {
                        rc->stereo_off_x = rc->pr->stereo_fixed_x_left;
                        rc->stereo_off_y = rc->pr->stereo_fixed_y_left;
                        }
                }
-        DEBUG_1("update size: %p  %d %d   %d %d", rc, rc->stereo_off_x, rc->stereo_off_y, rc->pr->viewport_width, rc->pr->viewport_height);
-
-       printf("renderer_update_sizes  scale %d %d\n", rc->pr->width, rc->pr->height);
+       DEBUG_0("rc_update_viewport  scale %d %d", rc->pr->width, rc->pr->height);
 
         clutter_stage_set_color(CLUTTER_STAGE(rc->stage), &stage_color);
 
 
        clutter_actor_set_size(rc->group, rc->pr->viewport_width, rc->pr->viewport_height);
        clutter_actor_set_position(rc->group, rc->stereo_off_x, rc->stereo_off_y);
-       
+
        clutter_actor_set_rotation(CLUTTER_ACTOR(rc->group),
                                                CLUTTER_Y_AXIS,
-                                               (rc->stereo_mode & PR_STEREO_MIRROR) ? 180 : 0, 
+                                               (rc->stereo_mode & PR_STEREO_MIRROR) ? 180 : 0,
                                                rc->pr->viewport_width / 2.0, 0, 0);
 
        clutter_actor_set_rotation(CLUTTER_ACTOR(rc->group),
@@ -757,73 +773,82 @@ static void renderer_update_sizes(void *renderer)
        rc_overlay_update_positions(rc);
 }
 
-static void renderer_scroll(void *renderer, gint x_off, gint y_off)
+static void rc_scroll(void *renderer, gint x_off, gint y_off)
 {
-       printf("renderer_scroll\n");
+       DEBUG_0("rc_scroll");
        RendererClutter *rc = (RendererClutter *)renderer;
-       PixbufRenderer *pr = rc->pr;
 
        rc_sync_actor(rc);
 }
 
-static void renderer_stereo_set(void *renderer, gint stereo_mode)
+static void rc_stereo_set(void *renderer, gint stereo_mode)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
 
        rc->stereo_mode = stereo_mode;
 }
 
-static void renderer_free(void *renderer)
+static void rc_free(void *renderer)
 {
        RendererClutter *rc = (RendererClutter *)renderer;
        GtkWidget *widget = gtk_bin_get_child(GTK_BIN(rc->pr));
 
-       renderer_remove_pending_updates(rc);
+       rc_remove_pending_updates(rc);
 
        rc_overlay_free_all(rc);
-       
+
        if (widget)
                {
                /* widget still exists */
                clutter_actor_destroy(rc->group);
                if (clutter_group_get_n_children(CLUTTER_GROUP(rc->stage)) == 0)
                        {
-                       printf("destroy %p\n", rc->widget);
+                       DEBUG_1("destroy %p", rc->widget);
                        /* this was the last user */
                        gtk_widget_destroy(rc->widget);
                        }
                else
                        {
-                       printf("keep %p\n", rc->widget);
+                       DEBUG_1("keep %p", rc->widget);
                        g_object_unref(G_OBJECT(rc->widget));
                        }
                }
        g_free(rc);
 }
 
+/* initialize shader for transparency background checker */
+static void renderer_clutter_init_checker_shader(RendererClutter *rc)
+{
+       const RendererClutterShaderInfo info = {
+               16.0,                           /* checker size */
+               {0.6, 0.6, 0.6},        /* color 0 */
+               {0.4, 0.4, 0.4}         /* color 1 */
+       };
+       rc_set_shader(clutter_texture_get_cogl_material(CLUTTER_TEXTURE(rc->texture)), &info);
+}
+
 RendererFuncs *renderer_clutter_new(PixbufRenderer *pr)
 {
        RendererClutter *rc = g_new0(RendererClutter, 1);
-       
+
        rc->pr = pr;
-       
-       rc->f.area_changed = renderer_area_changed;
-       rc->f.update_pixbuf = renderer_update_pixbuf;
-       rc->f.free = renderer_free;
-       rc->f.update_zoom = renderer_update_zoom;
-       rc->f.invalidate_region = renderer_invalidate_region;
-       rc->f.scroll = renderer_scroll;
-       rc->f.update_sizes = renderer_update_sizes;
-
-
-       rc->f.overlay_add = renderer_overlay_add;
-       rc->f.overlay_set = renderer_overlay_set;
-       rc->f.overlay_get = renderer_overlay_get;
-       rc->f.overlay_draw = renderer_overlay_draw;
-
-       rc->f.stereo_set = renderer_stereo_set;
-       
-       
+
+       rc->f.area_changed = rc_area_changed;
+       rc->f.update_pixbuf = rc_update_pixbuf;
+       rc->f.free = rc_free;
+       rc->f.update_zoom = rc_update_zoom;
+       rc->f.invalidate_region = rc_invalidate_region;
+       rc->f.scroll = rc_scroll;
+       rc->f.update_viewport = rc_update_viewport;
+
+
+       rc->f.overlay_add = rc_overlay_add;
+       rc->f.overlay_set = rc_overlay_set;
+       rc->f.overlay_get = rc_overlay_get;
+
+       rc->f.stereo_set = rc_stereo_set;
+
+
        rc->stereo_mode = 0;
        rc->stereo_off_x = 0;
        rc->stereo_off_y = 0;
@@ -832,7 +857,7 @@ RendererFuncs *renderer_clutter_new(PixbufRenderer *pr)
        rc->pending_updates = NULL;
 
        rc->widget = gtk_bin_get_child(GTK_BIN(rc->pr));
-       
+
        if (rc->widget)
                {
                if (!GTK_CLUTTER_IS_EMBED(rc->widget))
@@ -842,27 +867,28 @@ RendererFuncs *renderer_clutter_new(PixbufRenderer *pr)
                        return NULL;
                        }
                }
-       else 
+       else
                {
                rc->widget = gtk_clutter_embed_new();
                gtk_container_add(GTK_CONTAINER(rc->pr), rc->widget);
                }
-               
+
        gtk_event_box_set_above_child (GTK_EVENT_BOX(rc->pr), TRUE);
         rc->stage = gtk_clutter_embed_get_stage (GTK_CLUTTER_EMBED (rc->widget));
-        
+
         rc->group = clutter_group_new();
        clutter_container_add_actor(CLUTTER_CONTAINER(rc->stage), rc->group);
        clutter_actor_set_clip_to_allocation(CLUTTER_ACTOR(rc->group), TRUE);
-  
+
        rc->texture = clutter_texture_new ();
        clutter_container_add_actor(CLUTTER_CONTAINER(rc->group), rc->texture);
-       rc_set_shader(clutter_texture_get_cogl_material(rc->texture));
-       g_object_ref(G_OBJECT(rc->widget));
-  
+
+       renderer_clutter_init_checker_shader(rc);
+       g_object_ref(G_OBJECT(rc->widget));
+
        gtk_widget_show(rc->widget);
        return (RendererFuncs *) rc;
 }
 
-#endif 
+#endif
 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */