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13d0e311b7
Prepare the plumbing in the GL renderer for textures that use target GL_TEXTURE_EXTERNAL_OES. These need to use a special sampler, so make sure our sampler machinery does not run over it.
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/* gskglattachmentstateprivate.h
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*
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* Copyright 2020 Christian Hergert <chergert@redhat.com>
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*
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* This file is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 2.1 of the License, or (at your option)
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* any later version.
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*
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* This file is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#pragma once
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#include "gskgltypesprivate.h"
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G_BEGIN_DECLS
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typedef struct _GskGLAttachmentState GskGLAttachmentState;
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typedef struct _GskGLBindFramebuffer GskGLBindFramebuffer;
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typedef struct _GskGLBindTexture GskGLBindTexture;
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#define GSK_GL_N_FILTERS 3
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#define SAMPLER_EXTERNAL 9
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G_STATIC_ASSERT (SAMPLER_EXTERNAL >= GSK_GL_N_FILTERS * GSK_GL_N_FILTERS);
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static inline guint
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filter_index (GLint filter)
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{
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switch (filter)
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{
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case GL_LINEAR:
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return 0;
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case GL_NEAREST:
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return 1;
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case GL_LINEAR_MIPMAP_LINEAR:
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return 2;
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default:
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g_assert_not_reached ();
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}
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}
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static inline guint
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sampler_index (GLint min_filter,
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GLint mag_filter)
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{
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return filter_index (min_filter) * GSK_GL_N_FILTERS + filter_index (mag_filter);
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}
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struct _GskGLBindTexture
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{
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guint changed : 1;
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guint initial : 1;
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GLenum target : 26;
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guint sampler : 4;
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GLenum texture;
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guint id;
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};
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G_STATIC_ASSERT (sizeof (GskGLBindTexture) == 12);
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struct _GskGLBindFramebuffer
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{
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guint changed : 1;
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guint id : 31;
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};
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G_STATIC_ASSERT (sizeof (GskGLBindFramebuffer) == 4);
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/* Increase if shaders add more textures */
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#define GSK_GL_MAX_TEXTURES_PER_PROGRAM 4
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struct _GskGLAttachmentState
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{
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GskGLBindFramebuffer fbo;
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GskGLBindTexture textures[GSK_GL_MAX_TEXTURES_PER_PROGRAM];
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guint n_changed;
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};
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GskGLAttachmentState *gsk_gl_attachment_state_new (void);
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GskGLAttachmentState *gsk_gl_attachment_state_ref (GskGLAttachmentState *self);
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void gsk_gl_attachment_state_unref (GskGLAttachmentState *self);
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void gsk_gl_attachment_state_bind_texture (GskGLAttachmentState *self,
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GLenum target,
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GLenum texture,
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guint id,
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GLint min_filter,
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GLint mag_filter);
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void gsk_gl_attachment_state_bind_framebuffer (GskGLAttachmentState *self,
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guint id);
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G_END_DECLS
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