static void
gst_gl_effects_xray_step_three (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray2");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray2", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
vconv7_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, gauss_kernel);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_sobel_callback_vconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader = NULL;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
if (NULL != (shader = gst_gl_effects_get_fragment_shader (effects, "vconv0",
sep_sobel_vconv3_fragment_source_gles2,
sep_sobel_vconv3_fragment_source_opengl))) {
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (GST_GL_BASE_FILTER (filter)->context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "height", height);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
}
static void
gst_gl_effects_twirl_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLContext *context = GST_GL_BASE_FILTER (filter)->context;
GstGLFuncs *gl = context->gl_vtable;
shader = gst_gl_effects_get_fragment_shader (effects, "twirl",
twirl_fragment_source_gles2);
if (!shader)
return;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
gst_gl_effects_squeeze_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLFilter *filter = GST_GL_FILTER (data);
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "squeeze0");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, (gchar *) "squeeze0", shader);
if (USING_GLES2 (context) || USING_OPENGL3 (context)) {
if (!gst_gl_shader_compile_with_default_v_and_check (shader,
squeeze_fragment_source_gles2, &filter->draw_attr_position_loc,
&filter->draw_attr_texture_loc)) {
/* gst gl context error is already set */
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("Failed to initialize squeeze shader, %s",
gst_gl_context_get_error ()), (NULL));
return;
}
}
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
if (!gst_gl_shader_compile_and_check (shader,
squeeze_fragment_source_opengl, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context,
"Failed to initialize squeeze shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
}
#endif
}
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
if (USING_OPENGL (context))
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
gst_gl_effects_heat_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
gst_gl_effects_luma_to_curve (effects, heat_curve, GST_GL_EFFECTS_CURVE_HEAT,
width, height, texture);
}
static void
gst_gl_effects_xray_step_one (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
gst_gl_effects_luma_to_curve (effects, xray_curve, GST_GL_EFFECTS_CURVE_XRAY,
width, height, texture);
}
static void
gst_gl_effects_init_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
effects->shaderstable = g_hash_table_new (g_str_hash, g_str_equal);
for (i = 0; i < NEEDED_TEXTURES; i++) {
effects->midtexture[i] = 0;
}
for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) {
effects->curve[i] = 0;
}
}
/* free resources that need a gl context */
static void
gst_gl_effects_reset_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
for (i = 0; i < 10; i++) {
glDeleteTextures (1, &effects->midtexture[i]);
effects->midtexture[i] = 0;
}
for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) {
glDeleteTextures (1, &effects->curve[i]);
effects->curve[i] = 0;
}
}
static void
gst_gl_effects_reset_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
/* release shaders in the gl thread */
g_hash_table_foreach (effects->shaderstable, gst_gl_effects_ghash_func_clean,
filter);
/* clean the htable without calling values destructors
* because shaders have been released in the glthread
* through the foreach func */
g_hash_table_unref (effects->shaderstable);
effects->shaderstable = NULL;
}
static gboolean
gst_gl_effects_filter (GstGLFilter * filter, GstGLBuffer * inbuf,
GstGLBuffer * outbuf)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
effects->intexture = inbuf->texture;
effects->outtexture = outbuf->texture;
if (effects->horizontal_swap == TRUE)
gst_gl_display_thread_add (filter->display, set_horizontal_swap, effects);
effects->effect (effects);
return TRUE;
}
static gboolean
gst_gl_effects_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
effects->intexture = in_tex;
effects->outtexture = out_tex;
if (effects->horizontal_swap == TRUE)
gst_gl_context_thread_add (filter->context, set_horizontal_swap, effects);
effects->effect (effects);
return TRUE;
}
/* free resources that need a gl context */
static void
gst_gl_effects_reset_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
gint i = 0;
for (i = 0; i < NEEDED_TEXTURES; i++) {
gl->DeleteTextures (1, &effects->midtexture[i]);
effects->midtexture[i] = 0;
}
for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) {
gl->DeleteTextures (1, &effects->curve[i]);
effects->curve[i] = 0;
}
}
void
gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "xray4");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, "xray4", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
multiply_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context, "Failed to initialize multiply shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE2);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, effects->midtexture[2]);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (shader, "base", 2);
gl->ActiveTexture (GL_TEXTURE1);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.5f);
gst_gl_shader_set_uniform_1i (shader, "blend", 1);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
gst_gl_effects_xray_step_two (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "xray1");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, "xray1", shader);
}
if (!kernel_ready) {
fill_gaussian_kernel (gauss_kernel, 7, 1.5);
kernel_ready = TRUE;
}
if (!gst_gl_shader_compile_and_check (shader,
hconv7_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context, "Failed to initialize hconv7 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE1);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, gauss_kernel);
gst_gl_shader_set_uniform_1f (shader, "width", width);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
void
gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLEffects *effects = GST_GL_EFFECTS (stuff);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray4");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray4", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
multiply_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize multiply shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, effects->midtexture[2]);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "base", 2);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.5f);
gst_gl_shader_set_uniform_1i (shader, "blend", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLEffects *effects = GST_GL_EFFECTS (object);
switch (prop_id) {
case PROP_EFFECT:
g_value_set_enum (value, effects->current_effect);
break;
case PROP_HSWAP:
g_value_set_boolean (value, effects->horizontal_swap);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* init resources that need a gl context */
static void
gst_gl_effects_init_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
for (i = 0; i < NEEDED_TEXTURES; i++) {
glGenTextures (1, &effects->midtexture[i]);
glBindTexture (GL_TEXTURE_2D, effects->midtexture[i]);
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8,
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
}
static void
gst_gl_effects_xray_step_two (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray1");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray1", shader);
}
if (!kernel_ready) {
fill_gaussian_kernel (gauss_kernel, 7, 1.5);
kernel_ready = TRUE;
}
if (!gst_gl_shader_compile_and_check (shader,
hconv7_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize hconv7 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, gauss_kernel);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_square_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "square0");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, "square0", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
square_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context, "Failed to initialize square shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "width", (gfloat) width / 2.0f);
gst_gl_shader_set_uniform_1f (shader, "height", (gfloat) height / 2.0f);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
gst_gl_effects_xray_sobel_length (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_len");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, (gchar *) "xray_sob_len",
shader);
}
if (!gst_gl_shader_compile_and_check (shader,
sep_sobel_length_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context,
"Failed to initialize seobel length shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE1);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1i (shader, "invert", TRUE);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
/* init resources that need a gl context */
static void
gst_gl_effects_init_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
for (i = 0; i < NEEDED_TEXTURES; i++) {
glGenTextures (1, &effects->midtexture[i]);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, effects->midtexture[i]);
glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
filter->width, filter->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
}
}
static void
gst_gl_effects_stretch_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "stretch0");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "stretch0", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
stretch_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize stretch shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "width", (gfloat) width / 2.0f);
gst_gl_shader_set_uniform_1f (shader, "height", (gfloat) height / 2.0f);
gst_gl_effects_draw_texture (effects, texture);
}
void
gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLEffects *effects = GST_GL_EFFECTS (stuff);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray4");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray4", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
multiply_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, effects->midtexture[2]);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "base", 2);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.5f);
gst_gl_shader_set_uniform_1i (shader, "blend", 1);
gst_gl_effects_draw_texture (effects, texture);
}
