mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-09-20 22:10:40 +00:00
b5345b7f25
Instead of uploading a texture once per filter, ensure textures are uploaded as little as possible and use samplers instead to switch different filters. Sometimes we have to reupload a texture unfortunately, when it is an external one and we want to create mipmaps.
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* gskglattachmentstateprivate.h
|
|
*
|
|
* Copyright 2020 Christian Hergert <chergert@redhat.com>
|
|
*
|
|
* This file 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 2.1 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This file 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 General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* SPDX-License-Identifier: LGPL-2.1-or-later
|
|
*/
|
|
|
|
#ifndef __GSK_GL_ATTACHMENT_STATE_PRIVATE_H__
|
|
#define __GSK_GL_ATTACHMENT_STATE_PRIVATE_H__
|
|
|
|
#include "gskgltypesprivate.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _GskGLAttachmentState GskGLAttachmentState;
|
|
typedef struct _GskGLBindFramebuffer GskGLBindFramebuffer;
|
|
typedef struct _GskGLBindTexture GskGLBindTexture;
|
|
|
|
#define GSK_GL_N_FILTERS 3
|
|
|
|
static inline guint
|
|
filter_index (GLint filter)
|
|
{
|
|
switch (filter)
|
|
{
|
|
case GL_LINEAR:
|
|
return 0;
|
|
case GL_NEAREST:
|
|
return 1;
|
|
case GL_LINEAR_MIPMAP_LINEAR:
|
|
return 2;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
static inline guint
|
|
sampler_index (GLint min_filter,
|
|
GLint mag_filter)
|
|
{
|
|
return filter_index (min_filter) * GSK_GL_N_FILTERS + filter_index (mag_filter);
|
|
}
|
|
|
|
struct _GskGLBindTexture
|
|
{
|
|
guint changed : 1;
|
|
guint initial : 1;
|
|
GLenum target : 26;
|
|
guint sampler : 4;
|
|
GLenum texture;
|
|
guint id;
|
|
};
|
|
|
|
G_STATIC_ASSERT (sizeof (GskGLBindTexture) == 12);
|
|
|
|
struct _GskGLBindFramebuffer
|
|
{
|
|
guint changed : 1;
|
|
guint id : 31;
|
|
};
|
|
|
|
G_STATIC_ASSERT (sizeof (GskGLBindFramebuffer) == 4);
|
|
|
|
struct _GskGLAttachmentState
|
|
{
|
|
GskGLBindFramebuffer fbo;
|
|
/* Increase if shaders add more textures */
|
|
GskGLBindTexture textures[4];
|
|
guint n_changed;
|
|
};
|
|
|
|
GskGLAttachmentState *gsk_gl_attachment_state_new (void);
|
|
GskGLAttachmentState *gsk_gl_attachment_state_ref (GskGLAttachmentState *self);
|
|
void gsk_gl_attachment_state_unref (GskGLAttachmentState *self);
|
|
void gsk_gl_attachment_state_bind_texture (GskGLAttachmentState *self,
|
|
GLenum target,
|
|
GLenum texture,
|
|
guint id,
|
|
GLint min_filter,
|
|
GLint mag_filter);
|
|
void gsk_gl_attachment_state_bind_framebuffer (GskGLAttachmentState *self,
|
|
guint id);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GSK_GL_ATTACHMENT_STATE_PRIVATE_H__ */
|