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glsl-effect: Switch to create_pipeline vfunc

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This new ClutterOffscreenEffect vastly simplifies subclasses
by allowing them to hand the parent class a CoglPipeline to
use.

Override the create_pipeline() vfunc and return the (cached)
pipeline. Remove the paint_target() override and the now
unnecessary texture size fields from the structure.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1350>
This commit is contained in:
Georges Basile Stavracas Neto 2020-07-05 17:40:46 -03:00 committed by Marge Bot
parent c09be8b0a9
commit 99935c746a
1 changed files with 10 additions and 49 deletions
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59
src/shell-glsl-effect.c
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@ -18,9 +18,6 @@ typedef struct _ShellGLSLEffectPrivate ShellGLSLEffectPrivate;
struct _ShellGLSLEffectPrivate
{
CoglPipeline *pipeline;
gint tex_width;
gint tex_height;
};
G_DEFINE_TYPE_WITH_PRIVATE (ShellGLSLEffect, shell_glsl_effect, CLUTTER_TYPE_OFFSCREEN_EFFECT);
@ -29,15 +26,7 @@ static gboolean
shell_glsl_effect_pre_paint (ClutterEffect *effect,
ClutterPaintContext *paint_context)
{
ShellGLSLEffect *self = SHELL_GLSL_EFFECT (effect);
ClutterOffscreenEffect *offscreen_effect = CLUTTER_OFFSCREEN_EFFECT (effect);
ShellGLSLEffectPrivate *priv = shell_glsl_effect_get_instance_private (self);
ClutterEffectClass *parent_class;
CoglHandle texture;
gboolean success;
if (!clutter_actor_meta_get_enabled (CLUTTER_ACTOR_META (effect)))
return FALSE;
if (!clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
{
@ -52,49 +41,21 @@ shell_glsl_effect_pre_paint (ClutterEffect *effect,
}
parent_class = CLUTTER_EFFECT_CLASS (shell_glsl_effect_parent_class);
success = parent_class->pre_paint (effect, paint_context);
return parent_class->pre_paint (effect, paint_context);
}
if (!success)
return FALSE;
texture = clutter_offscreen_effect_get_texture (offscreen_effect);
priv->tex_width = cogl_texture_get_width (texture);
priv->tex_height = cogl_texture_get_height (texture);
static CoglPipeline *
shell_glsl_effect_create_pipeline (ClutterOffscreenEffect *effect,
CoglTexture *texture)
{
ShellGLSLEffect *self = SHELL_GLSL_EFFECT (effect);
ShellGLSLEffectPrivate *priv = shell_glsl_effect_get_instance_private (self);
cogl_pipeline_set_layer_texture (priv->pipeline, 0, texture);
return TRUE;
return cogl_object_ref (priv->pipeline);
}
static void
shell_glsl_effect_paint_target (ClutterOffscreenEffect *effect,
ClutterPaintContext *paint_context)
{
ShellGLSLEffect *self = SHELL_GLSL_EFFECT (effect);
ShellGLSLEffectPrivate *priv;
ClutterActor *actor;
guint8 paint_opacity;
CoglFramebuffer *framebuffer;
priv = shell_glsl_effect_get_instance_private (self);
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
paint_opacity = clutter_actor_get_paint_opacity (actor);
cogl_pipeline_set_color4ub (priv->pipeline,
paint_opacity,
paint_opacity,
paint_opacity,
paint_opacity);
framebuffer = clutter_paint_context_get_framebuffer (paint_context);
cogl_framebuffer_draw_rectangle (framebuffer,
priv->pipeline,
0, 0,
priv->tex_width, priv->tex_height);
}
/**
* shell_glsl_effect_add_glsl_snippet:
* @effect: a #ShellGLSLEffect
@ -199,7 +160,7 @@ shell_glsl_effect_class_init (ShellGLSLEffectClass *klass)
ClutterOffscreenEffectClass *offscreen_class;
offscreen_class = CLUTTER_OFFSCREEN_EFFECT_CLASS (klass);
offscreen_class->paint_target = shell_glsl_effect_paint_target;
offscreen_class->create_pipeline = shell_glsl_effect_create_pipeline;
effect_class->pre_paint = shell_glsl_effect_pre_paint;