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107 lines
3 KiB
C
107 lines
3 KiB
C
/*
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* GStreamer
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* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include "gstglutils.h"
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struct _compile_shader
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{
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GstGLShader **shader;
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const gchar *vertex_src;
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const gchar *fragment_src;
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};
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static void
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_compile_shader (GstGLContext * context, struct _compile_shader *data)
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{
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GstGLShader *shader;
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GstGLSLStage *vert, *frag;
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GError *error = NULL;
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shader = gst_gl_shader_new (context);
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if (data->vertex_src) {
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vert = gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
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GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, data->vertex_src);
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if (!gst_glsl_stage_compile (vert, &error)) {
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GST_ERROR_OBJECT (vert, "%s", error->message);
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gst_object_unref (vert);
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gst_object_unref (shader);
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return;
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}
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if (!gst_gl_shader_attach (shader, vert)) {
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gst_object_unref (shader);
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return;
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}
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}
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if (data->fragment_src) {
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frag = gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
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GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
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data->fragment_src);
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if (!gst_glsl_stage_compile (frag, &error)) {
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GST_ERROR_OBJECT (frag, "%s", error->message);
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gst_object_unref (frag);
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gst_object_unref (shader);
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return;
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}
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if (!gst_gl_shader_attach (shader, frag)) {
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gst_object_unref (shader);
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return;
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}
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}
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if (!gst_gl_shader_link (shader, &error)) {
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GST_ERROR_OBJECT (shader, "%s", error->message);
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g_error_free (error);
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error = NULL;
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gst_gl_context_clear_shader (context);
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gst_object_unref (shader);
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return;
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}
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*data->shader = shader;
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}
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/* Called by glfilter */
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gboolean
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gst_gl_context_gen_shader (GstGLContext * context, const gchar * vert_src,
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const gchar * frag_src, GstGLShader ** shader)
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{
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struct _compile_shader data;
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g_return_val_if_fail (frag_src != NULL || vert_src != NULL, FALSE);
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g_return_val_if_fail (shader != NULL, FALSE);
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data.shader = shader;
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data.vertex_src = vert_src;
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data.fragment_src = frag_src;
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gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _compile_shader,
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&data);
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return *shader != NULL;
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}
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