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gltransformation: support gl3

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This commit is contained in:
Matthew Waters 2014-11-13 12:12:46 +11:00
parent dd80a40604
commit 3772c83f94
2 changed files with 112 additions and 40 deletions
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146
ext/gl/gstgltransformation.c
View file

@ -81,6 +81,7 @@ static void gst_gl_transformation_get_property (GObject * object, guint prop_id,
static gboolean gst_gl_transformation_set_caps (GstGLFilter * filter,
GstCaps * incaps, GstCaps * outcaps);
static void gst_gl_transformation_reset_gl (GstGLFilter * filter);
static void gst_gl_transformation_reset (GstGLFilter * filter);
static gboolean gst_gl_transformation_init_shader (GstGLFilter * filter);
static void gst_gl_transformation_callback (gpointer stuff);
@ -127,6 +128,8 @@ gst_gl_transformation_class_init (GstGLTransformationClass * klass)
gobject_class->get_property = gst_gl_transformation_get_property;
GST_GL_FILTER_CLASS (klass)->onInitFBO = gst_gl_transformation_init_shader;
GST_GL_FILTER_CLASS (klass)->display_reset_cb =
gst_gl_transformation_reset_gl;
GST_GL_FILTER_CLASS (klass)->onReset = gst_gl_transformation_reset;
GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_transformation_set_caps;
GST_GL_FILTER_CLASS (klass)->filter_texture =
@ -374,11 +377,30 @@ gst_gl_transformation_set_caps (GstGLFilter * filter, GstCaps * incaps,
(gdouble) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
(gdouble) GST_VIDEO_INFO_HEIGHT (&filter->out_info);
transformation->caps_change = TRUE;
gst_gl_transformation_build_mvp (transformation);
return TRUE;
}
static void
gst_gl_transformation_reset_gl (GstGLFilter * filter)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
const GstGLFuncs *gl = filter->context->gl_vtable;
if (transformation->vao) {
gl->DeleteVertexArrays (1, &transformation->vao);
transformation->vao = 0;
}
if (transformation->vertex_buffer) {
gl->DeleteBuffers (1, &transformation->vertex_buffer);
transformation->vertex_buffer = 0;
}
}
static void
gst_gl_transformation_reset (GstGLFilter * filter)
{
@ -421,6 +443,59 @@ gst_gl_transformation_filter_texture (GstGLFilter * filter, guint in_tex,
return TRUE;
}
static void
_upload_vertices (GstGLTransformation * transformation)
{
const GstGLFuncs *gl = GST_GL_FILTER (transformation)->context->gl_vtable;
/* *INDENT-OFF* */
GLfloat vertices[] = {
-transformation->aspect, 1.0, 0.0, 1.0, 0.0, 1.0,
transformation->aspect, 1.0, 0.0, 1.0, 1.0, 1.0,
transformation->aspect, -1.0, 0.0, 1.0, 1.0, 0.0,
-transformation->aspect, -1.0, 0.0, 1.0, 0.0, 0.0
};
/* *INDENT-ON* */
gl->BindBuffer (GL_ARRAY_BUFFER, transformation->vertex_buffer);
gl->BufferData (GL_ARRAY_BUFFER, 4 * 6 * sizeof (GLfloat), vertices,
GL_STATIC_DRAW);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
}
static void
_bind_buffer (GstGLTransformation * transformation)
{
const GstGLFuncs *gl = GST_GL_FILTER (transformation)->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, transformation->vertex_buffer);
/* Load the vertex position */
gl->VertexAttribPointer (transformation->attr_position, 4, GL_FLOAT,
GL_FALSE, 6 * sizeof (GLfloat), (void *) 0);
/* Load the texture coordinate */
gl->VertexAttribPointer (transformation->attr_texture, 2, GL_FLOAT, GL_FALSE,
6 * sizeof (GLfloat), (void *) (4 * sizeof (GLfloat)));
gl->EnableVertexAttribArray (transformation->attr_position);
gl->EnableVertexAttribArray (transformation->attr_texture);
}
static void
_unbind_buffer (GstGLTransformation * transformation)
{
const GstGLFuncs *gl = GST_GL_FILTER (transformation)->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
gl->DisableVertexAttribArray (transformation->attr_position);
gl->DisableVertexAttribArray (transformation->attr_texture);
}
static void
gst_gl_transformation_callback (gpointer stuff)
{
@ -428,31 +503,10 @@ gst_gl_transformation_callback (gpointer stuff)
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
/* *INDENT-OFF* */
const GLfloat positions[] = {
-transformation->aspect, 1.0, 0.0, 1.0,
transformation->aspect, 1.0, 0.0, 1.0,
transformation->aspect, -1.0, 0.0, 1.0,
-transformation->aspect, -1.0, 0.0, 1.0,
};
const GLfloat texture_coordinates[] = {
0.0, 1.0,
1.0, 1.0,
1.0, 0.0,
0.0, 0.0,
};
/* *INDENT-ON* */
GLushort indices[] = { 0, 1, 2, 3, 0 };
GLfloat temp_matrix[16];
GLint attr_position_loc = 0;
GLint attr_texture_loc = 0;
gst_gl_context_clear_shader (filter->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
@ -461,23 +515,6 @@ gst_gl_transformation_callback (gpointer stuff)
gst_gl_shader_use (transformation->shader);
attr_position_loc =
gst_gl_shader_get_attribute_location (transformation->shader, "position");
attr_texture_loc =
gst_gl_shader_get_attribute_location (transformation->shader, "uv");
/* Load the vertex position */
gl->VertexAttribPointer (attr_position_loc, 4, GL_FLOAT,
GL_FALSE, 0, positions);
/* Load the texture coordinate */
gl->VertexAttribPointer (attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 0, texture_coordinates);
gl->EnableVertexAttribArray (attr_position_loc);
gl->EnableVertexAttribArray (attr_texture_loc);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, transformation->in_tex);
gst_gl_shader_set_uniform_1i (transformation->shader, "texture", 0);
@ -486,10 +523,39 @@ gst_gl_transformation_callback (gpointer stuff)
gst_gl_shader_set_uniform_matrix_4fv (transformation->shader, "mvp",
1, GL_FALSE, temp_matrix);
if (!transformation->vertex_buffer) {
transformation->attr_position =
gst_gl_shader_get_attribute_location (transformation->shader,
"position");
transformation->attr_texture =
gst_gl_shader_get_attribute_location (transformation->shader, "uv");
if (gl->GenVertexArrays) {
gl->GenVertexArrays (1, &transformation->vao);
gl->BindVertexArray (transformation->vao);
}
gl->GenBuffers (1, &transformation->vertex_buffer);
transformation->caps_change = TRUE;
}
if (gl->GenVertexArrays)
gl->BindVertexArray (transformation->vao);
if (transformation->caps_change)
_upload_vertices (transformation);
if (!gl->GenVertexArrays || transformation->caps_change)
_bind_buffer (transformation);
gl->DrawElements (GL_TRIANGLE_STRIP, 5, GL_UNSIGNED_SHORT, indices);
gl->DisableVertexAttribArray (attr_position_loc);
gl->DisableVertexAttribArray (attr_texture_loc);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (transformation);
gst_gl_context_clear_shader (filter->context);
transformation->caps_change = FALSE;
}

6
ext/gl/gstgltransformation.h
View file

@ -41,6 +41,10 @@ struct _GstGLTransformation
GstGLFilter filter;
GstGLShader *shader;
GLuint vao;
GLuint vertex_buffer;
GLint attr_position;
GLint attr_texture;
guint in_tex;
@ -63,6 +67,8 @@ struct _GstGLTransformation
gboolean ortho;
graphene_matrix_t mvp_matrix;
gboolean caps_change;
};
struct _GstGLTransformationClass