mirror of
https://github.com/brl/mutter.git
synced 2024-11-26 10:00:45 -05:00
[shader] Unify code paths
ClutterShader contains a lot of duplication, as the vertex and fragment shader code paths are mostly the same. The code should be simplified by adding new internal functions that can be called with a value from the already present ClutterShaderType enumeration. In the future it'll also be possible to deprecate the current split API and expose the generic accessors instead.
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@ -3,10 +3,12 @@
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Øyvind Kolås <pippin@o-hand.com>
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* Authored By: Matthew Allum <mallum@openedhand.com>
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* Øyvind Kolås <pippin@o-hand.com>
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*
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* Copyright (C) 2007 OpenedHand
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* Copyright (C) 2007, 2008 OpenedHand
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* Copyright (C) 2009 Intel Corp
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -48,6 +50,7 @@
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#endif
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#include <glib.h>
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#include <glib/gi18n-lib.h>
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#include "cogl/cogl.h"
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@ -55,11 +58,10 @@
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#include "clutter-private.h"
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#include "clutter-shader.h"
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/* global list of shaders */
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static GList *clutter_shaders_list = NULL;
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#define CLUTTER_SHADER_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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CLUTTER_TYPE_SHADER, ClutterShaderPrivate))
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#define CLUTTER_SHADER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_SHADER, ClutterShaderPrivate))
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typedef enum {
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CLUTTER_VERTEX_SHADER,
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@ -193,6 +195,7 @@ static void
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clutter_shader_class_init (ClutterShaderClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GParamSpec *pspec = NULL;
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object_class->finalize = clutter_shader_finalize;
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object_class->set_property = clutter_shader_set_property;
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@ -204,18 +207,18 @@ clutter_shader_class_init (ClutterShaderClass *klass)
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/**
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* ClutterShader:vertex-source:
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*
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* GLSL source code for the vertex shader part of the shader program, if any.
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* GLSL source code for the vertex shader part of the shader
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* program, if any
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*
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* Since: 0.6
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*/
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g_object_class_install_property
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(object_class,
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PROP_VERTEX_SOURCE,
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g_param_spec_string ("vertex-source",
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"Vertex Source",
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"Source of vertex shader",
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NULL,
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CLUTTER_PARAM_READWRITE));
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pspec = g_param_spec_string ("vertex-source",
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"Vertex Source",
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"Source of vertex shader",
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NULL,
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CLUTTER_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_VERTEX_SOURCE, pspec);
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/**
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* ClutterShader:fragment-source:
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*
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@ -223,14 +226,13 @@ clutter_shader_class_init (ClutterShaderClass *klass)
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*
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* Since: 0.6
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*/
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g_object_class_install_property
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(object_class,
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PROP_FRAGMENT_SOURCE,
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g_param_spec_string ("fragment-source",
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"Fragment Source",
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"Source of fragment shader",
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NULL,
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CLUTTER_PARAM_READWRITE));
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pspec = g_param_spec_string ("fragment-source",
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"Fragment Source",
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"Source of fragment shader",
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NULL,
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CLUTTER_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_FRAGMENT_SOURCE, pspec);
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/**
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* ClutterShader:compiled:
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*
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@ -239,14 +241,13 @@ clutter_shader_class_init (ClutterShaderClass *klass)
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*
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* Since: 0.8
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*/
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g_object_class_install_property
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(object_class,
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PROP_COMPILED,
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g_param_spec_boolean ("compiled",
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"Compiled",
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"Whether the shader is compiled and linked",
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FALSE,
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CLUTTER_PARAM_READABLE));
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pspec = g_param_spec_boolean ("compiled",
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"Compiled",
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"Whether the shader is compiled and linked",
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FALSE,
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CLUTTER_PARAM_READABLE);
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g_object_class_install_property (object_class, PROP_COMPILED, pspec);
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/**
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* ClutterShader:enabled:
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*
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@ -254,14 +255,12 @@ clutter_shader_class_init (ClutterShaderClass *klass)
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*
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* Since: 0.6
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*/
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g_object_class_install_property
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(object_class,
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PROP_ENABLED,
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g_param_spec_boolean ("enabled",
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"Enabled",
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"Whether the shader is enabled",
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FALSE,
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CLUTTER_PARAM_READWRITE));
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pspec = g_param_spec_boolean ("enabled",
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"Enabled",
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"Whether the shader is enabled",
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FALSE,
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CLUTTER_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_ENABLED, pspec);
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}
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static void
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@ -296,6 +295,55 @@ clutter_shader_new (void)
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return g_object_new (CLUTTER_TYPE_SHADER, NULL);
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}
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static inline void
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clutter_shader_set_source (ClutterShader *shader,
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ClutterShaderType shader_type,
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const gchar *data,
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gssize length)
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{
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ClutterShaderPrivate *priv = shader->priv;
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gboolean is_glsl = FALSE;
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if (length < 0)
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length = strlen (data);
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g_object_freeze_notify (G_OBJECT (shader));
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/* release shader if bound when changing the source, the shader will
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* automatically be rebound on the next use.
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*/
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if (clutter_shader_is_compiled (shader))
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clutter_shader_release (shader);
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is_glsl = !g_str_has_prefix (data, "!!ARBfp");
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CLUTTER_NOTE (SHADER,
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"setting %s shader (GLSL:%s, len:%" G_GSSIZE_FORMAT ")",
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shader_type == CLUTTER_VERTEX_SHADER ? "vertex" : "fragment",
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is_glsl ? "yes" : "no",
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length);
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switch (shader_type)
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{
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case CLUTTER_FRAGMENT_SHADER:
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g_free (priv->fragment_source);
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priv->fragment_source = g_strndup (data, length);
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priv->fragment_is_glsl = is_glsl;
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g_object_notify (G_OBJECT (shader), "fragment-source");
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break;
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case CLUTTER_VERTEX_SHADER:
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g_free (priv->vertex_source);
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priv->vertex_source = g_strndup (data, length);
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priv->vertex_is_glsl = is_glsl;
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g_object_notify (G_OBJECT (shader), "vertex-source");
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break;
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}
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g_object_thaw_notify (G_OBJECT (shader));
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}
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/**
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* clutter_shader_set_fragment_source:
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@ -313,36 +361,10 @@ clutter_shader_set_fragment_source (ClutterShader *shader,
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const gchar *data,
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gssize length)
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{
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ClutterShaderPrivate *priv;
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gboolean is_glsl;
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/* FIXME: do not ignore length, since we are exposing it in the API */
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if (shader == NULL)
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g_error ("quack!");
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g_return_if_fail (CLUTTER_IS_SHADER (shader));
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g_return_if_fail (data != NULL);
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priv = shader->priv;
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/* release shader if bound when changing the source, the shader will
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* automatically be rebound on the next use.
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*/
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if (clutter_shader_is_compiled (shader))
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clutter_shader_release (shader);
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is_glsl = !g_str_has_prefix (data, "!!ARBfp");
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g_free (priv->fragment_source);
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CLUTTER_NOTE (SHADER,
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"setting fragment shader (GLSL:%s, len:%" G_GSSIZE_FORMAT ")",
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is_glsl ? "yes" : "no",
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length);
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priv->fragment_source = g_strdup (data);
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priv->fragment_is_glsl = is_glsl;
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clutter_shader_set_source (shader, CLUTTER_FRAGMENT_SHADER, data, length);
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}
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/**
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@ -361,101 +383,132 @@ clutter_shader_set_vertex_source (ClutterShader *shader,
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const gchar *data,
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gssize length)
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{
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ClutterShaderPrivate *priv;
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gboolean is_glsl;
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if (shader == NULL)
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g_error ("quack!");
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g_return_if_fail (CLUTTER_IS_SHADER (shader));
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g_return_if_fail (data != NULL);
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priv = shader->priv;
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clutter_shader_set_source (shader, CLUTTER_VERTEX_SHADER, data, length);
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}
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/* release shader if bound when changing the source, the shader will
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* automatically be rebound on the next use.
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*/
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if (clutter_shader_is_compiled (shader))
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clutter_shader_release (shader);
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static const gchar *
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clutter_shader_get_source (ClutterShader *shader,
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ClutterShaderType shader_type)
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{
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switch (shader_type)
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{
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case CLUTTER_FRAGMENT_SHADER:
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return shader->priv->fragment_source;
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is_glsl = !g_str_has_prefix (data, "!!ARBvp");
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case CLUTTER_VERTEX_SHADER:
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return shader->priv->vertex_source;
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}
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g_free (priv->vertex_source);
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return NULL;
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}
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CLUTTER_NOTE (SHADER,
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"setting vertex shader (GLSL:%s, len:%" G_GSSIZE_FORMAT ")",
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is_glsl ? "yes" : "no",
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length);
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static CoglHandle
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clutter_shader_get_cogl_shader (ClutterShader *shader,
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ClutterShaderType shader_type)
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{
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switch (shader_type)
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{
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case CLUTTER_FRAGMENT_SHADER:
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return shader->priv->fragment_shader;
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priv->vertex_source = g_strdup (data);
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priv->vertex_is_glsl = is_glsl;
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case CLUTTER_VERTEX_SHADER:
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return shader->priv->vertex_shader;
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}
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return COGL_INVALID_HANDLE;
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}
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static gboolean
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clutter_shader_glsl_bind (ClutterShader *self,
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ClutterShaderType shader_type,
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GError **error)
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{
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ClutterShaderPrivate *priv = self->priv;
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GLint is_compiled = CGL_FALSE;
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CoglHandle shader = COGL_INVALID_HANDLE;
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switch (shader_type)
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{
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case CLUTTER_VERTEX_SHADER:
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shader = cogl_create_shader (CGL_VERTEX_SHADER);
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cogl_shader_source (shader, priv->vertex_source);
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priv->vertex_shader = shader;
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break;
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case CLUTTER_FRAGMENT_SHADER:
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shader = cogl_create_shader (CGL_FRAGMENT_SHADER);
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cogl_shader_source (shader, priv->fragment_source);
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priv->fragment_shader = shader;
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break;
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}
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g_assert (shader != COGL_INVALID_HANDLE);
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cogl_shader_compile (shader);
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cogl_shader_get_parameteriv (shader,
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CGL_OBJECT_COMPILE_STATUS,
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&is_compiled);
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if (is_compiled != CGL_TRUE)
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{
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gchar error_buf[512];
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cogl_shader_get_info_log (shader, 512, error_buf);
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g_set_error (error, CLUTTER_SHADER_ERROR,
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CLUTTER_SHADER_ERROR_COMPILE,
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_("%s compilation failed: %s"),
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shader_type == CLUTTER_VERTEX_SHADER ? _("Vertex shader")
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: _("Fragment shader"),
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error_buf);
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return FALSE;
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}
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cogl_program_attach_shader (priv->program, shader);
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return TRUE;
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}
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static gboolean
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bind_glsl_shader (ClutterShader *self,
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GError **error)
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{
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ClutterShaderPrivate *priv;
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priv = self->priv;
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ClutterShaderPrivate *priv = self->priv;
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GError *bind_error = NULL;
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gboolean res;
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priv->program = cogl_create_program ();
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if (priv->vertex_is_glsl && priv->vertex_source != COGL_INVALID_HANDLE)
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{
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GLint compiled = CGL_FALSE;
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res = clutter_shader_glsl_bind (self,
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CLUTTER_VERTEX_SHADER,
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&bind_error);
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priv->vertex_shader = cogl_create_shader (CGL_VERTEX_SHADER);
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cogl_shader_source (priv->vertex_shader, priv->vertex_source);
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cogl_shader_compile (priv->vertex_shader);
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cogl_shader_get_parameteriv (priv->vertex_shader,
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CGL_OBJECT_COMPILE_STATUS,
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&compiled);
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if (compiled != CGL_TRUE)
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if (!res)
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{
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gchar error_buf[512];
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cogl_shader_get_info_log (priv->vertex_shader, 512, error_buf);
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g_set_error (error, CLUTTER_SHADER_ERROR,
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CLUTTER_SHADER_ERROR_COMPILE,
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"Vertex shader compilation failed: %s",
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error_buf);
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g_propagate_error (error, bind_error);
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return FALSE;
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}
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else
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cogl_program_attach_shader (priv->program, priv->vertex_shader);
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}
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if (priv->fragment_is_glsl && priv->fragment_source != COGL_INVALID_HANDLE)
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{
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GLint compiled = CGL_FALSE;
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res = clutter_shader_glsl_bind (self,
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CLUTTER_FRAGMENT_SHADER,
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&bind_error);
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priv->fragment_shader = cogl_create_shader (CGL_FRAGMENT_SHADER);
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cogl_shader_source (priv->fragment_shader, priv->fragment_source);
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cogl_shader_compile (priv->fragment_shader);
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cogl_shader_get_parameteriv (priv->fragment_shader,
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CGL_OBJECT_COMPILE_STATUS,
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&compiled);
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if (compiled != CGL_TRUE)
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if (!res)
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{
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gchar error_buf[512];
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cogl_shader_get_info_log (priv->fragment_shader, 512, error_buf);
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g_set_error (error, CLUTTER_SHADER_ERROR,
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CLUTTER_SHADER_ERROR_COMPILE,
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"Fragment shader compilation failed: %s",
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error_buf);
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g_propagate_error (error, bind_error);
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return FALSE;
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}
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else
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cogl_program_attach_shader (priv->program, priv->fragment_shader);
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}
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cogl_program_link (priv->program);
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@ -652,23 +705,19 @@ clutter_shader_get_is_enabled (ClutterShader *shader)
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* to a #ClutterShader.
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*
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* Since: 0.6
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*
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* Deprecated: 1.0: Use clutter_shader_set_uniform() instead
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*/
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void
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clutter_shader_set_uniform_1f (ClutterShader *shader,
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const gchar *name,
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gfloat value)
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{
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ClutterShaderPrivate *priv;
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GLint location = 0;
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GLfloat foo = value;
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GValue real_value = { 0, };
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g_return_if_fail (CLUTTER_IS_SHADER (shader));
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g_return_if_fail (name != NULL);
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priv = shader->priv;
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location = cogl_program_get_uniform_location (priv->program, name);
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cogl_program_uniform_1f (location, foo);
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g_value_init (&real_value, G_TYPE_FLOAT);
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clutter_shader_set_uniform (shader, name, &real_value);
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g_value_unset (&real_value);
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}
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/**
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@ -757,7 +806,6 @@ _clutter_shader_release_all (void)
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NULL);
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}
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/**
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* clutter_shader_get_fragment_source:
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* @shader: a #ClutterShader
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@ -774,7 +822,8 @@ G_CONST_RETURN gchar *
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clutter_shader_get_fragment_source (ClutterShader *shader)
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{
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g_return_val_if_fail (CLUTTER_IS_SHADER (shader), NULL);
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return shader->priv->fragment_source;
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return clutter_shader_get_source (shader, CLUTTER_FRAGMENT_SHADER);
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}
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/**
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@ -793,7 +842,8 @@ G_CONST_RETURN gchar *
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clutter_shader_get_vertex_source (ClutterShader *shader)
|
||||
{
|
||||
g_return_val_if_fail (CLUTTER_IS_SHADER (shader), NULL);
|
||||
return shader->priv->vertex_source;
|
||||
|
||||
return clutter_shader_get_source (shader, CLUTTER_VERTEX_SHADER);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -810,6 +860,7 @@ CoglHandle
|
||||
clutter_shader_get_cogl_program (ClutterShader *shader)
|
||||
{
|
||||
g_return_val_if_fail (CLUTTER_IS_SHADER (shader), NULL);
|
||||
|
||||
return shader->priv->program;
|
||||
}
|
||||
|
||||
@ -827,7 +878,8 @@ CoglHandle
|
||||
clutter_shader_get_cogl_fragment_shader (ClutterShader *shader)
|
||||
{
|
||||
g_return_val_if_fail (CLUTTER_IS_SHADER (shader), NULL);
|
||||
return shader->priv->fragment_shader;
|
||||
|
||||
return clutter_shader_get_cogl_shader (shader, CLUTTER_FRAGMENT_SHADER);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -844,7 +896,8 @@ CoglHandle
|
||||
clutter_shader_get_cogl_vertex_shader (ClutterShader *shader)
|
||||
{
|
||||
g_return_val_if_fail (CLUTTER_IS_SHADER (shader), NULL);
|
||||
return shader->priv->vertex_shader;
|
||||
|
||||
return clutter_shader_get_cogl_shader (shader, CLUTTER_VERTEX_SHADER);
|
||||
}
|
||||
|
||||
GQuark
|
||||
|
@ -1,3 +1,4 @@
|
||||
# keep sorted alphabetically!
|
||||
clutter/clutter-actor.c
|
||||
clutter/clutter-behaviour.c
|
||||
clutter/clutter-color.c
|
||||
@ -6,6 +7,7 @@ clutter/clutter-event.c
|
||||
clutter/clutter-fixed.c
|
||||
clutter/clutter-fixed.h
|
||||
clutter/clutter-main.c
|
||||
clutter/clutter-shader.c
|
||||
clutter/clutter-stage-window.c
|
||||
clutter/clutter-stage.c
|
||||
clutter/clutter-texture.c
|
||||
|
Loading…
Reference in New Issue
Block a user