mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 12:11:13 +00:00
glsl: add a shader stage object GstGLSLStage
Represents a stage (vertex, geometry, fragment, etc) in the shader pipeline.
This commit is contained in:
Matthew Waters
Tim-Philipp Müller
parent
18e205dcbb
commit
8c922ca96b
5 changed files with 623 additions and 0 deletions
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@ -19,6 +19,7 @@ libgstgl_@GST_API_VERSION@_la_SOURCES = \
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gstglbasefilter.c \
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gstglshader.c \
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gstglsl.c \
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gstglslstage.c \
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gstglshadervariables.c \
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gstglcolorconvert.c \
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gstgldownload.c \
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@ -49,6 +50,7 @@ libgstgl_@GST_API_VERSION@include_HEADERS = \
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gstglshadervariables.h \
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gstglshader.h \
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gstglsl.h \
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gstglslstage.h \
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gstglcolorconvert.h \
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gstgldownload.h \
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gstgluploadmeta.h \
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@ -35,6 +35,7 @@
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#include <gst/gl/gstglfeature.h>
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#include <gst/gl/gstglutils.h>
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#include <gst/gl/gstglwindow.h>
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#include <gst/gl/gstglslstage.h>
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#include <gst/gl/gstglshader.h>
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#include <gst/gl/gstglcolorconvert.h>
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#include <gst/gl/gstglupload.h>
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@ -47,6 +47,10 @@ typedef struct _GstGLMemory GstGLMemory;
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typedef struct _GstGLAllocator GstGLAllocator;
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typedef struct _GstGLAllocatorClass GstGLAllocatorClass;
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typedef struct _GstGLSLStage GstGLSLStage;
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typedef struct _GstGLSLStagePrivate GstGLSLStagePrivate;
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typedef struct _GstGLSLStageClass GstGLSLStageClass;
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typedef struct _GstGLShader GstGLShader;
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typedef struct _GstGLShaderPrivate GstGLShaderPrivate;
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typedef struct _GstGLShaderClass GstGLShaderClass;
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527
gst-libs/gst/gl/gstglslstage.c
Normal file
527
gst-libs/gst/gl/gstglslstage.c
Normal file
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@ -0,0 +1,527 @@
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/*
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* GStreamer
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* Copyright (C) 2015 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/gl/gl.h>
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#include "gstglslstage.h"
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#include "gstglsl_private.h"
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static const gchar *es2_version_header = "#version 100\n";
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/* *INDENT-OFF* */
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static const gchar *simple_vertex_shader_str_gles2 =
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"attribute vec4 a_position;\n"
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"attribute vec2 a_texcoord;\n"
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"varying vec2 v_texcoord;\n"
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"void main()\n"
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"{\n"
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" gl_Position = a_position;\n"
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" v_texcoord = a_texcoord;\n"
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"}\n";
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static const gchar *simple_fragment_shader_str_gles2 =
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"#ifdef GL_ES\n"
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"precision mediump float;\n"
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"#endif\n"
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"varying vec2 v_texcoord;\n"
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"uniform sampler2D tex;\n"
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"void main()\n"
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"{\n"
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" gl_FragColor = texture2D(tex, v_texcoord);\n"
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"}";
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/* *INDENT-ON* */
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GST_DEBUG_CATEGORY_STATIC (gst_glsl_stage_debug);
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#define GST_CAT_DEFAULT gst_glsl_stage_debug
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G_DEFINE_TYPE_WITH_CODE (GstGLSLStage, gst_glsl_stage, GST_TYPE_OBJECT,
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GST_DEBUG_CATEGORY_INIT (gst_glsl_stage_debug, "glslstage", 0,
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"GLSL Stage");
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);
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#define GST_GLSL_STAGE_GET_PRIVATE(o) \
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(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GLSL_STAGE, GstGLSLStagePrivate))
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struct _GstGLSLStagePrivate
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{
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GstGLSLFuncs vtable;
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GLenum type;
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GLhandleARB handle;
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GstGLSLVersion version;
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GstGLSLProfile profile;
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gchar **strings;
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gint n_strings;
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gboolean compiled;
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};
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static void
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gst_glsl_stage_finalize (GObject * object)
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{
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GstGLSLStage *stage = GST_GLSL_STAGE (object);
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gint i;
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if (stage->context) {
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gst_object_unref (stage->context);
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stage->context = NULL;
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}
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for (i = 0; i < stage->priv->n_strings; i++) {
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g_free (stage->priv->strings[i]);
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}
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g_free (stage->priv->strings);
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stage->priv->strings = NULL;
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G_OBJECT_CLASS (gst_glsl_stage_parent_class)->finalize (object);
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}
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static void
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gst_glsl_stage_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_glsl_stage_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_glsl_stage_class_init (GstGLSLStageClass * klass)
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{
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GObjectClass *obj_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstGLSLStagePrivate));
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obj_class->finalize = gst_glsl_stage_finalize;
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obj_class->set_property = gst_glsl_stage_set_property;
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obj_class->get_property = gst_glsl_stage_get_property;
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}
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static void
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gst_glsl_stage_init (GstGLSLStage * stage)
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{
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stage->priv = GST_GLSL_STAGE_GET_PRIVATE (stage);
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}
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static gboolean
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_is_valid_shader_type (GLenum type)
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{
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switch (type) {
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case GL_VERTEX_SHADER:
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case GL_FRAGMENT_SHADER:
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#ifdef GL_TESS_CONTROL_SHADER
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case GL_TESS_CONTROL_SHADER:
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#endif
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#ifdef GL_TESS_EVALUATION_SHADER
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case GL_TESS_EVALUATION_SHADER:
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#endif
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#ifdef GL_GEOMETRY_SHADER
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case GL_GEOMETRY_SHADER:
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#endif
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#ifdef GL_COMPUTE_SHADER
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case GL_COMPUTE_SHADER:
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#endif
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return TRUE;
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default:
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return FALSE;
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}
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}
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static const gchar *
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_shader_type_to_string (GLenum type)
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{
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switch (type) {
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case GL_VERTEX_SHADER:
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return "vertex";
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case GL_FRAGMENT_SHADER:
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return "fragment";
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#ifdef GL_TESS_CONTROL_SHADER
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case GL_TESS_CONTROL_SHADER:
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return "tesselation control";
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#endif
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#ifdef GL_TESS_EVALUATION_SHADER
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case GL_TESS_EVALUATION_SHADER:
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return "tesselation evaluation";
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#endif
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#ifdef GL_GEOMETRY_SHADER
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case GL_GEOMETRY_SHADER:
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return "geometry";
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#endif
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#ifdef GL_COMPUTE_SHADER
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case GL_COMPUTE_SHADER:
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return "compute";
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#endif
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default:
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return "unknown";
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}
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}
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static gboolean
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_ensure_shader (GstGLSLStage * stage)
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{
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if (stage->priv->handle)
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return TRUE;
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if (!(stage->priv->handle =
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stage->priv->vtable.CreateShader (stage->priv->type)))
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return FALSE;
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return stage->priv->handle != 0;
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}
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/**
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* gst_glsl_stage_new_with_strings:
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* @context: a #GstGLContext
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* @type: the GL enum shader stage type
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*
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* Returns: (transfer full): a new #GstGLSLStage of the specified @type
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*/
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GstGLSLStage *
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gst_glsl_stage_new_with_strings (GstGLContext * context, guint type,
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GstGLSLVersion version, GstGLSLProfile profile, gint n_strings,
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const gchar ** str)
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{
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GstGLSLStage *stage;
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g_return_val_if_fail (GST_GL_IS_CONTEXT (context), NULL);
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g_return_val_if_fail (_is_valid_shader_type (type), NULL);
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stage = g_object_new (GST_TYPE_GLSL_STAGE, NULL);
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/* FIXME: GInittable */
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if (!_gst_glsl_funcs_fill (&stage->priv->vtable, context)) {
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gst_object_unref (stage);
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return NULL;
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}
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stage->context = gst_object_ref (context);
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stage->priv->type = type;
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if (!gst_glsl_stage_set_strings (stage, version, profile, n_strings, str)) {
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gst_object_unref (stage);
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return NULL;
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}
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return stage;
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}
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/**
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* gst_glsl_stage_new_with_strings:
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* @context: a #GstGLContext
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* @type: the GL enum shader stage type
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*
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* Returns: (transfer full): a new #GstGLSLStage of the specified @type
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*/
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GstGLSLStage *
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gst_glsl_stage_new_with_string (GstGLContext * context, guint type,
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GstGLSLVersion version, GstGLSLProfile profile, const gchar * str)
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{
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return gst_glsl_stage_new_with_strings (context, type, version, profile, 1,
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&str);
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}
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/**
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* gst_glsl_stage_new:
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* @context: a #GstGLContext
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* @type: the GL enum shader stage type
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*
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* Returns: (transfer full): a new #GstGLSLStage of the specified @type
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*/
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GstGLSLStage *
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gst_glsl_stage_new (GstGLContext * context, guint type)
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{
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return gst_glsl_stage_new_with_string (context, type, GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_NONE, NULL);
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}
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/**
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* gst_glsl_stage_new_with_default_vertex:
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* @context: a #GstGLContext
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*
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* Returns: (transfer full): a new #GstGLSLStage with the default vertex shader
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*/
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GstGLSLStage *
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gst_glsl_stage_new_default_vertex (GstGLContext * context)
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{
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return 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,
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simple_vertex_shader_str_gles2);
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}
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/**
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* gst_glsl_stage_new_with_default_fragment:
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* @context: a #GstGLContext
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*
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* Returns: (transfer full): a new #GstGLSLStage with the default fragment shader
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*/
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GstGLSLStage *
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gst_glsl_stage_new_default_fragment (GstGLContext * context)
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{
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return 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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simple_fragment_shader_str_gles2);
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}
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/**
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* gst_glsl_stage_set_strings:
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* @stage: a #GstGLSLStage
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* @version: a #GstGLSLVersion
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* @profile: a #GstGLSLProfile
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* @n_strings: number of strings in @str
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* @str: (transfer none): a GLSL shader string
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*
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* Replaces the current shader string with @str.
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*/
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gboolean
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gst_glsl_stage_set_strings (GstGLSLStage * stage, GstGLSLVersion version,
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GstGLSLProfile profile, gint n_strings, const gchar ** str)
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{
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gint i;
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g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), FALSE);
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g_return_val_if_fail (n_strings > 0, FALSE);
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g_return_val_if_fail (str != NULL, FALSE);
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if (!gst_gl_context_supports_glsl_profile_version (stage->context, version,
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profile))
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return FALSE;
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stage->priv->version = version;
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stage->priv->profile = profile;
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for (i = 0; i < stage->priv->n_strings; i++) {
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g_free (stage->priv->strings[i]);
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}
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if (stage->priv->n_strings < n_strings) {
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/* only realloc if we need more space */
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if (stage->priv->strings)
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g_free (stage->priv->strings);
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stage->priv->strings = g_new0 (gchar *, n_strings);
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}
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for (i = 0; i < n_strings; i++)
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stage->priv->strings[i] = g_strdup (str[i]);
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stage->priv->n_strings = n_strings;
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return TRUE;
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}
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/**
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* gst_glsl_stage_get_shader_type:
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* @stage: a #GstGLSLStage
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*
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* Returns: The GL shader type for this shader stage
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*/
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guint
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gst_glsl_stage_get_shader_type (GstGLSLStage * stage)
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{
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g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), 0);
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return stage->priv->type;
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}
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/**
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* gst_glsl_stage_get_handle:
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* @stage: a #GstGLSLStage
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*
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* Returns: The GL handle for this shader stage
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*/
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guint
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gst_glsl_stage_get_handle (GstGLSLStage * stage)
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{
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g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), 0);
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g_return_val_if_fail (stage->priv->compiled, 0);
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return stage->priv->handle;
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}
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/**
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* gst_glsl_stage_get_version:
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* @stage: a #GstGLSLStage
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*
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* Returns: The GLSL version for the current shader stage
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*/
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GstGLSLVersion
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gst_glsl_stage_get_version (GstGLSLStage * stage)
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{
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g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), 0);
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return stage->priv->version;
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}
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/**
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* gst_glsl_stage_get_profile:
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* @stage: a #GstGLSLStage
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*
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* Returns: The GLSL profile for the current shader stage
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*/
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GstGLSLProfile
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gst_glsl_stage_get_profile (GstGLSLStage * stage)
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{
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g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), 0);
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return stage->priv->profile;
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}
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static void
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_maybe_prepend_version (GstGLSLStage * stage, gchar ** shader_str,
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gint * n_vertex_sources, const gchar *** vertex_sources)
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{
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gint n = *n_vertex_sources;
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gboolean add_header = FALSE;
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gint i, j;
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/* FIXME: this all an educated guess */
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if (gst_gl_context_check_gl_version (stage->context, GST_GL_API_OPENGL3, 3, 0)
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&& (stage->priv->profile & GST_GLSL_PROFILE_ES) != 0
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&& !_gst_glsl_shader_string_find_version (shader_str[0])) {
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add_header = TRUE;
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n++;
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}
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*vertex_sources = g_malloc0 (n * sizeof (gchar *));
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i = 0;
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if (add_header)
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*vertex_sources[i++] = es2_version_header;
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for (j = 0; j < stage->priv->n_strings; i++, j++)
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(*vertex_sources)[i] = shader_str[j];
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*n_vertex_sources = n;
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}
|
||||
|
||||
struct compile
|
||||
{
|
||||
GstGLSLStage *stage;
|
||||
GError **error;
|
||||
gboolean result;
|
||||
};
|
||||
|
||||
static void
|
||||
_compile_shader (GstGLContext * context, struct compile *data)
|
||||
{
|
||||
GstGLSLStagePrivate *priv = data->stage->priv;
|
||||
GstGLSLFuncs *vtable = &data->stage->priv->vtable;
|
||||
const GstGLFuncs *gl = context->gl_vtable;
|
||||
const gchar **vertex_sources;
|
||||
gchar info_buffer[2048];
|
||||
gint n_vertex_sources;
|
||||
GLint status;
|
||||
gint len;
|
||||
gint i;
|
||||
|
||||
if (data->stage->priv->compiled) {
|
||||
data->result = TRUE;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!_ensure_shader (data->stage)) {
|
||||
g_set_error (data->error, GST_GLSL_ERROR, GST_GLSL_ERROR_COMPILE,
|
||||
"Failed to create shader object");
|
||||
return;
|
||||
}
|
||||
|
||||
n_vertex_sources = data->stage->priv->n_strings;
|
||||
_maybe_prepend_version (data->stage, priv->strings, &n_vertex_sources,
|
||||
&vertex_sources);
|
||||
|
||||
GST_TRACE_OBJECT (data->stage, "compiling shader:");
|
||||
for (i = 0; i < n_vertex_sources; i++) {
|
||||
GST_TRACE_OBJECT (data->stage, "%s", vertex_sources[i]);
|
||||
}
|
||||
|
||||
gl->ShaderSource (priv->handle, n_vertex_sources,
|
||||
(const gchar **) vertex_sources, NULL);
|
||||
gl->CompileShader (priv->handle);
|
||||
/* FIXME: supported threaded GLSL compilers and don't destroy compilation
|
||||
* performance by getting the compilation result directly after compilation */
|
||||
gl->GetShaderiv (priv->handle, GL_COMPILE_STATUS, &status);
|
||||
|
||||
vtable->GetShaderInfoLog (priv->handle, sizeof (info_buffer) - 1, &len,
|
||||
info_buffer);
|
||||
info_buffer[len] = '\0';
|
||||
|
||||
if (status != GL_TRUE) {
|
||||
GST_ERROR_OBJECT (data->stage, "%s shader compilation failed:%s",
|
||||
_shader_type_to_string (priv->type), info_buffer);
|
||||
|
||||
g_set_error (data->error, GST_GLSL_ERROR, GST_GLSL_ERROR_COMPILE,
|
||||
"%s shader compilation failed:%s",
|
||||
_shader_type_to_string (priv->type), info_buffer);
|
||||
|
||||
vtable->DeleteShader (priv->handle);
|
||||
data->result = FALSE;
|
||||
return;
|
||||
} else if (len > 1) {
|
||||
GST_FIXME_OBJECT (data->stage, "%s shader info log:%s",
|
||||
_shader_type_to_string (priv->type), info_buffer);
|
||||
}
|
||||
|
||||
data->result = TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_glsl_stage_compile:
|
||||
* @stage: a #GstGLSLStage
|
||||
*
|
||||
* Returns: whether the compilation suceeded
|
||||
*/
|
||||
gboolean
|
||||
gst_glsl_stage_compile (GstGLSLStage * stage, GError ** error)
|
||||
{
|
||||
struct compile data;
|
||||
|
||||
g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), FALSE);
|
||||
|
||||
if (!stage->priv->strings) {
|
||||
g_set_error (error, GST_GLSL_ERROR, GST_GLSL_ERROR_COMPILE,
|
||||
"No shader source to compile");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
data.stage = stage;
|
||||
data.error = error;
|
||||
|
||||
gst_gl_context_thread_add (stage->context,
|
||||
(GstGLContextThreadFunc) _compile_shader, &data);
|
||||
|
||||
stage->priv->compiled = TRUE;
|
||||
|
||||
return data.result;
|
||||
}
|
||||
89
gst-libs/gst/gl/gstglslstage.h
Normal file
89
gst-libs/gst/gl/gstglslstage.h
Normal file
|
|
@ -0,0 +1,89 @@
|
|||
/*
|
||||
* GStreamer
|
||||
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Library 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
|
||||
* Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Library General Public
|
||||
* License along with this library; if not, write to the
|
||||
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
||||
* Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#ifndef __GST_GLSL_STAGE_H__
|
||||
#define __GST_GLSL_STAGE_H__
|
||||
|
||||
#include <gst/gl/gstglsl.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
typedef struct _GstGLSLStage GstGLSLStage;
|
||||
typedef struct _GstGLSLStageClass GstGLSLStageClass;
|
||||
typedef struct _GstGLSLStagePrivate GstGLSLStagePrivate;
|
||||
|
||||
#define GST_TYPE_GLSL_STAGE (gst_glsl_stage_get_type())
|
||||
#define GST_GLSL_STAGE(o) (G_TYPE_CHECK_INSTANCE_CAST((o), GST_TYPE_GLSL_STAGE, GstGLSLStage))
|
||||
#define GST_GLSL_STAGE_CLASS(k) (G_TYPE_CHECK_CLASS((k), GST_TYPE_GLSL_STAGE, GstGLSLStageClass))
|
||||
#define GST_IS_GLSL_STAGE(o) (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_TYPE_GLSL_STAGE))
|
||||
#define GST_IS_GLSL_STAGE_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE((k), GST_TYPE_GLSL_STAGE))
|
||||
#define GST_GLSL_STAGE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_TYPE_GLSL_STAGE, GstGLSLStageClass))
|
||||
|
||||
struct _GstGLSLStage
|
||||
{
|
||||
/*< private >*/
|
||||
GstObject parent;
|
||||
|
||||
GstGLContext *context;
|
||||
|
||||
GstGLSLStagePrivate *priv;
|
||||
|
||||
gpointer _padding[GST_PADDING];
|
||||
};
|
||||
|
||||
struct _GstGLSLStageClass
|
||||
{
|
||||
GstObjectClass parent;
|
||||
|
||||
/*< private >*/
|
||||
};
|
||||
|
||||
GType gst_glsl_stage_get_type (void);
|
||||
GstGLSLStage * gst_glsl_stage_new (GstGLContext * context, guint type);
|
||||
GstGLSLStage * gst_glsl_stage_new_with_string (GstGLContext * context,
|
||||
guint type,
|
||||
GstGLSLVersion version,
|
||||
GstGLSLProfile profile,
|
||||
const gchar * str);
|
||||
GstGLSLStage * gst_glsl_stage_new_with_strings (GstGLContext * context,
|
||||
guint type,
|
||||
GstGLSLVersion version,
|
||||
GstGLSLProfile profile,
|
||||
gint n_strings,
|
||||
const gchar ** str);
|
||||
|
||||
GstGLSLStage * gst_glsl_stage_new_default_fragment (GstGLContext * context);
|
||||
GstGLSLStage * gst_glsl_stage_new_default_vertex (GstGLContext * context);
|
||||
|
||||
guint gst_glsl_stage_get_handle (GstGLSLStage * stage);
|
||||
GstGLSLProfile gst_glsl_stage_get_profile (GstGLSLStage * stage);
|
||||
GstGLSLVersion gst_glsl_stage_get_version (GstGLSLStage * stage);
|
||||
guint gst_glsl_stage_get_shader_type (GstGLSLStage * stage);
|
||||
gboolean gst_glsl_stage_set_strings (GstGLSLStage * stage,
|
||||
GstGLSLVersion version,
|
||||
GstGLSLProfile profile,
|
||||
gint n_strings,
|
||||
const gchar ** str);
|
||||
gboolean gst_glsl_stage_compile (GstGLSLStage * stage,
|
||||
GError ** error);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_GLSL_STAGE_H__ */
|
||||
Loading…
Reference in a new issue