mutter/cogl/cogl-material-compat.c
Robert Bragg df21e20f65 Adds CoglError api
Although we use GLib internally in Cogl we would rather not leak GLib
api through Cogl's own api, except through explicitly namespaced
cogl_glib_ / cogl_gtype_ feature apis.

One of the benefits we see to not leaking GLib through Cogl's public API
is that documentation for Cogl won't need to first introduce the Glib
API to newcomers, thus hopefully lowering the barrier to learning Cogl.

This patch provides a Cogl specific typedef for reporting runtime errors
which by no coincidence matches the typedef for GError exactly.  If Cogl
is built with --enable-glib (default) then developers can even safely
assume that a CoglError is a GError under the hood.

This patch also enforces a consistent policy for when NULL is passed as
an error argument and an error is thrown. In this case we log the error
and abort the application, instead of silently ignoring it. In common
cases where nothing has been implemented to handle a particular error
and/or where applications are just printing the error and aborting
themselves then this saves some typing. This also seems more consistent
with language based exceptions which usually cause a program to abort if
they are not explicitly caught (which passing a non-NULL error signifies
in this case)

Since this policy for NULL error pointers is stricter than the standard
GError convention, there is a clear note in the documentation to warn
developers that are used to using the GError api.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46)

Note: Since we can't change the Cogl 1.x api the patch was changed to
not rename _error_quark() functions to be _error_domain() functions and
although it's a bit ugly, instead of providing our own CoglError type
that's compatible with GError we simply #define CoglError to GError
unless Cogl is built with glib disabled.

Note: this patch does technically introduce an API break since it drops
the cogl_error_get_type() symbol generated by glib-mkenum (Since the
CoglError enum was replaced by a CoglSystemError enum) but for now we
are assuming that this will not affect anyone currently using the Cogl
API. If this does turn out to be a problem in practice then we would be
able to fix this my manually copying an implementation of
cogl_error_get_type() generated by glib-mkenum into a compatibility
source file and we could also define the original COGL_ERROR_ enums for
compatibility too.

Note: another minor concern with cherry-picking this patch to the 1.14
branch is that an api scanner would be lead to believe that some APIs
have changed, and for example the gobject-introspection parser which
understands the semantics of GError will not understand the semantics of
CoglError. We expect most people that have tried to use
gobject-introspection with Cogl already understand though that it is not
well suited to generating bindings of the Cogl api anyway and we aren't
aware or anyone depending on such bindings for apis involving GErrors.
(GnomeShell only makes very-very minimal use of Cogl via the gjs
bindings for the cogl_rectangle and cogl_color apis.)

The main reason we have cherry-picked this patch to the 1.14 branch
even given the above concerns is that without it it would become very
awkward for us to cherry-pick other beneficial patches from master.
2013-01-22 17:47:39 +00:00

455 lines
13 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <cogl-material-compat.h>
#include <cogl-pipeline.h>
#include <cogl-pipeline-private.h>
#include <cogl-types.h>
#include <cogl-matrix.h>
#include <cogl-context-private.h>
CoglMaterial *
cogl_material_new (void)
{
_COGL_GET_CONTEXT(ctx, NULL);
return COGL_MATERIAL (cogl_pipeline_new (ctx));
}
CoglMaterial *
cogl_material_copy (CoglMaterial *source)
{
return COGL_MATERIAL (cogl_pipeline_copy (COGL_PIPELINE (source)));
}
CoglHandle
cogl_material_ref (CoglHandle handle)
{
return cogl_object_ref (handle);
}
void
cogl_material_unref (CoglHandle handle)
{
cogl_object_unref (handle);
}
CoglBool
cogl_is_material (CoglHandle handle)
{
return cogl_is_pipeline (handle);
}
void
cogl_material_set_color (CoglMaterial *material,
const CoglColor *color)
{
cogl_pipeline_set_color (COGL_PIPELINE (material), color);
}
void
cogl_material_set_color4ub (CoglMaterial *material,
uint8_t red,
uint8_t green,
uint8_t blue,
uint8_t alpha)
{
cogl_pipeline_set_color4ub (COGL_PIPELINE (material),
red, green, blue, alpha);
}
void
cogl_material_set_color4f (CoglMaterial *material,
float red,
float green,
float blue,
float alpha)
{
cogl_pipeline_set_color4f (COGL_PIPELINE (material),
red, green, blue, alpha);
}
void
cogl_material_get_color (CoglMaterial *material,
CoglColor *color)
{
cogl_pipeline_get_color (COGL_PIPELINE (material), color);
}
void
cogl_material_set_ambient (CoglMaterial *material,
const CoglColor *ambient)
{
cogl_pipeline_set_ambient (COGL_PIPELINE (material), ambient);
}
void
cogl_material_get_ambient (CoglMaterial *material,
CoglColor *ambient)
{
cogl_pipeline_get_ambient (COGL_PIPELINE (material), ambient);
}
void
cogl_material_set_diffuse (CoglMaterial *material,
const CoglColor *diffuse)
{
cogl_pipeline_set_diffuse (COGL_PIPELINE (material), diffuse);
}
void
cogl_material_get_diffuse (CoglMaterial *material,
CoglColor *diffuse)
{
cogl_pipeline_get_diffuse (COGL_PIPELINE (material), diffuse);
}
void
cogl_material_set_ambient_and_diffuse (CoglMaterial *material,
const CoglColor *color)
{
cogl_pipeline_set_ambient_and_diffuse (COGL_PIPELINE (material), color);
}
void
cogl_material_set_specular (CoglMaterial *material,
const CoglColor *specular)
{
cogl_pipeline_set_specular (COGL_PIPELINE (material), specular);
}
void
cogl_material_get_specular (CoglMaterial *material,
CoglColor *specular)
{
cogl_pipeline_get_specular (COGL_PIPELINE (material), specular);
}
void
cogl_material_set_shininess (CoglMaterial *material,
float shininess)
{
cogl_pipeline_set_shininess (COGL_PIPELINE (material), shininess);
}
float
cogl_material_get_shininess (CoglMaterial *material)
{
return cogl_pipeline_get_shininess (COGL_PIPELINE (material));
}
void
cogl_material_set_emission (CoglMaterial *material,
const CoglColor *emission)
{
cogl_pipeline_set_emission (COGL_PIPELINE (material), emission);
}
void
cogl_material_get_emission (CoglMaterial *material,
CoglColor *emission)
{
cogl_pipeline_get_emission (COGL_PIPELINE (material), emission);
}
void
cogl_material_set_alpha_test_function (CoglMaterial *material,
CoglMaterialAlphaFunc alpha_func,
float alpha_reference)
{
cogl_pipeline_set_alpha_test_function (COGL_PIPELINE (material),
alpha_func,
alpha_reference);
}
CoglBool
cogl_material_set_blend (CoglMaterial *material,
const char *blend_string,
CoglError **error)
{
return cogl_pipeline_set_blend (COGL_PIPELINE (material),
blend_string,
error);
}
void
cogl_material_set_blend_constant (CoglMaterial *material,
const CoglColor *constant_color)
{
cogl_pipeline_set_blend_constant (COGL_PIPELINE (material), constant_color);
}
void
cogl_material_set_point_size (CoglMaterial *material,
float point_size)
{
cogl_pipeline_set_point_size (COGL_PIPELINE (material), point_size);
}
float
cogl_material_get_point_size (CoglMaterial *material)
{
return cogl_pipeline_get_point_size (COGL_PIPELINE (material));
}
CoglHandle
cogl_material_get_user_program (CoglMaterial *material)
{
return cogl_pipeline_get_user_program (COGL_PIPELINE (material));
}
void
cogl_material_set_user_program (CoglMaterial *material,
CoglHandle program)
{
cogl_pipeline_set_user_program (COGL_PIPELINE (material), program);
}
void
cogl_material_set_layer (CoglMaterial *material,
int layer_index,
CoglHandle texture)
{
cogl_pipeline_set_layer_texture (COGL_PIPELINE (material),
layer_index, texture);
}
void
cogl_material_remove_layer (CoglMaterial *material,
int layer_index)
{
cogl_pipeline_remove_layer (COGL_PIPELINE (material), layer_index);
}
CoglBool
cogl_material_set_layer_combine (CoglMaterial *material,
int layer_index,
const char *blend_string,
CoglError **error)
{
return cogl_pipeline_set_layer_combine (COGL_PIPELINE (material),
layer_index,
blend_string,
error);
}
void
cogl_material_set_layer_combine_constant (CoglMaterial *material,
int layer_index,
const CoglColor *constant)
{
cogl_pipeline_set_layer_combine_constant (COGL_PIPELINE (material),
layer_index,
constant);
}
void
cogl_material_set_layer_matrix (CoglMaterial *material,
int layer_index,
const CoglMatrix *matrix)
{
cogl_pipeline_set_layer_matrix (COGL_PIPELINE (material),
layer_index, matrix);
}
const GList *
cogl_material_get_layers (CoglMaterial *material)
{
return _cogl_pipeline_get_layers (COGL_PIPELINE (material));
}
int
cogl_material_get_n_layers (CoglMaterial *material)
{
return cogl_pipeline_get_n_layers (COGL_PIPELINE (material));
}
CoglMaterialLayerType
cogl_material_layer_get_type (CoglMaterialLayer *layer)
{
return COGL_MATERIAL_LAYER_TYPE_TEXTURE;
}
CoglHandle
cogl_material_layer_get_texture (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_texture (COGL_PIPELINE_LAYER (layer));
}
CoglMaterialFilter
cogl_material_layer_get_min_filter (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_min_filter (COGL_PIPELINE_LAYER (layer));
}
CoglMaterialFilter
cogl_material_layer_get_mag_filter (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_mag_filter (COGL_PIPELINE_LAYER (layer));
}
void
cogl_material_set_layer_filters (CoglMaterial *material,
int layer_index,
CoglMaterialFilter min_filter,
CoglMaterialFilter mag_filter)
{
cogl_pipeline_set_layer_filters (COGL_PIPELINE (material),
layer_index,
min_filter,
mag_filter);
}
CoglBool
cogl_material_set_layer_point_sprite_coords_enabled (CoglMaterial *material,
int layer_index,
CoglBool enable,
CoglError **error)
{
CoglPipeline *pipeline = COGL_PIPELINE (material);
return cogl_pipeline_set_layer_point_sprite_coords_enabled (pipeline,
layer_index,
enable,
error);
}
CoglBool
cogl_material_get_layer_point_sprite_coords_enabled (CoglMaterial *material,
int layer_index)
{
CoglPipeline *pipeline = COGL_PIPELINE (material);
return cogl_pipeline_get_layer_point_sprite_coords_enabled (pipeline,
layer_index);
}
CoglMaterialWrapMode
cogl_material_get_layer_wrap_mode_s (CoglMaterial *material,
int layer_index)
{
return cogl_pipeline_get_layer_wrap_mode_s (COGL_PIPELINE (material),
layer_index);
}
void
cogl_material_set_layer_wrap_mode_s (CoglMaterial *material,
int layer_index,
CoglMaterialWrapMode mode)
{
cogl_pipeline_set_layer_wrap_mode_s (COGL_PIPELINE (material), layer_index,
mode);
}
CoglMaterialWrapMode
cogl_material_get_layer_wrap_mode_t (CoglMaterial *material,
int layer_index)
{
return cogl_pipeline_get_layer_wrap_mode_t (COGL_PIPELINE (material),
layer_index);
}
void
cogl_material_set_layer_wrap_mode_t (CoglMaterial *material,
int layer_index,
CoglMaterialWrapMode mode)
{
cogl_pipeline_set_layer_wrap_mode_t (COGL_PIPELINE (material), layer_index,
mode);
}
CoglMaterialWrapMode
cogl_material_get_layer_wrap_mode_p (CoglMaterial *material,
int layer_index)
{
return cogl_pipeline_get_layer_wrap_mode_p (COGL_PIPELINE (material),
layer_index);
}
void
cogl_material_set_layer_wrap_mode_p (CoglMaterial *material,
int layer_index,
CoglMaterialWrapMode mode)
{
cogl_pipeline_set_layer_wrap_mode_p (COGL_PIPELINE (material), layer_index,
mode);
}
void
cogl_material_set_layer_wrap_mode (CoglMaterial *material,
int layer_index,
CoglMaterialWrapMode mode)
{
cogl_pipeline_set_layer_wrap_mode (COGL_PIPELINE (material), layer_index,
mode);
}
CoglMaterialWrapMode
cogl_material_layer_get_wrap_mode_s (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_wrap_mode_s (COGL_PIPELINE_LAYER (layer));
}
CoglMaterialWrapMode
cogl_material_layer_get_wrap_mode_t (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_wrap_mode_t (COGL_PIPELINE_LAYER (layer));
}
CoglMaterialWrapMode
cogl_material_layer_get_wrap_mode_p (CoglMaterialLayer *layer)
{
return _cogl_pipeline_layer_get_wrap_mode_p (COGL_PIPELINE_LAYER (layer));
}
void
cogl_material_foreach_layer (CoglMaterial *material,
CoglMaterialLayerCallback callback,
void *user_data)
{
cogl_pipeline_foreach_layer (COGL_PIPELINE (material),
(CoglPipelineLayerCallback)callback, user_data);
}
CoglBool
cogl_material_set_depth_state (CoglMaterial *material,
const CoglDepthState *state,
CoglError **error)
{
return cogl_pipeline_set_depth_state (COGL_PIPELINE (material),
state, error);
}
void
cogl_material_get_depth_state (CoglMaterial *material,
CoglDepthState *state_out)
{
cogl_pipeline_get_depth_state (COGL_PIPELINE (material), state_out);
}