void
cogl_shader_compile (CoglHandle handle)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
#ifdef HAVE_COGL_GL
shader = handle;
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
_cogl_shader_compile_real (handle, NULL);
#endif
/* XXX: For GLSL we don't actually compile anything until the shader
* gets used so we have an opportunity to add some boilerplate to
* the shader.
*
* At the end of the day this is obviously a badly designed API
* given that we are having to lie to the user. It was a mistake to
* so thinly wrap the OpenGL shader API and the current plan is to
* replace it with a pipeline snippets API. */
}
CoglBool
cogl_shader_is_compiled (CoglHandle handle)
{
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES2)
if (!cogl_is_shader (handle))
return FALSE;
/* XXX: This API doesn't really do anything!
*
* This API is purely for compatibility and blatantly lies to the
* user about whether their shader has been compiled.
*
* I suppose we could say we're stretching the definition of
* "compile" and are deferring any related errors to be "linker"
* errors.
*
* The reason we don't do anything is because a shader needs to
* be associated with a CoglPipeline for Cogl to be able to
* compile and link anything.
*
* The CoglShader API is mostly deprecated by CoglSnippets and so
* these days we do the bare minimum to support the existing users
* of it until they are able to migrate to the snippets api.
*/
return TRUE;
#else
return FALSE;
#endif
}
char *
cogl_shader_get_info_log (CoglHandle handle)
{
if (!cogl_is_shader (handle))
return NULL;
/* XXX: This API doesn't really do anything!
*
* This API is purely for compatibility
*
* The reason we don't do anything is because a shader needs to
* be associated with a CoglPipeline for Cogl to be able to
* compile and link anything.
*
* The way this API was originally designed as a very thin wrapper
* over the GL api was a mistake and it's now very difficult to
* make the API work in a meaningful way given how the rest of Cogl
* has evolved.
*
* The CoglShader API is mostly deprecated by CoglSnippets and so
* these days we do the bare minimum to support the existing users
* of it until they are able to migrate to the snippets api.
*/
return g_strdup ("");
}
void
cogl_program_attach_shader (CoglHandle program_handle,
CoglHandle shader_handle)
{
CoglProgram *program;
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_program (program_handle) || !cogl_is_shader (shader_handle))
return;
program = _cogl_program_pointer_from_handle (program_handle);
shader = _cogl_shader_pointer_from_handle (shader_handle);
/* Only one shader is allowed if the type is ARBfp */
if (shader->language == COGL_SHADER_LANGUAGE_ARBFP)
g_return_if_fail (program->attached_shaders == NULL);
else if (shader->language == COGL_SHADER_LANGUAGE_GLSL)
g_return_if_fail (_cogl_program_get_language (program) ==
COGL_SHADER_LANGUAGE_GLSL);
program->attached_shaders
= g_slist_prepend (program->attached_shaders,
cogl_handle_ref (shader_handle));
program->age++;
}
void
cogl_shader_source (CoglHandle handle,
const char *source)
{
CoglShader *shader;
CoglShaderLanguage language;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = handle;
#ifdef HAVE_COGL_GL
if (strncmp (source, "!!ARBfp1.0", 10) == 0)
language = COGL_SHADER_LANGUAGE_ARBFP;
else
#endif
language = COGL_SHADER_LANGUAGE_GLSL;
/* Delete the old object if the language is changing... */
if (G_UNLIKELY (language != shader->language) &&
shader->gl_handle)
delete_shader (shader);
shader->source = g_strdup (source);
shader->language = language;
}
CoglShaderType
cogl_shader_get_type (CoglHandle handle)
{
GLint type;
CoglShader *shader;
if (!cogl_is_shader (handle))
{
g_warning ("Non shader handle type passed to cogl_shader_get_type");
return COGL_SHADER_TYPE_VERTEX;
}
shader = _cogl_shader_pointer_from_handle (handle);
GE (glGetShaderiv (shader->gl_handle, GL_SHADER_TYPE, &type));
if (type == GL_VERTEX_SHADER)
return COGL_SHADER_TYPE_VERTEX;
else if (type == GL_FRAGMENT_SHADER)
return COGL_SHADER_TYPE_VERTEX;
else
{
g_warning ("Unexpected shader type 0x%08lX", (unsigned long)type);
return COGL_SHADER_TYPE_VERTEX;
}
}
void
cogl_shader_compile (CoglHandle handle)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glCompileShaderARB (shader->gl_handle);
}
void
cogl_shader_source (CoglHandle handle,
const gchar *source)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glShaderSourceARB (shader->gl_handle, 1, &source, NULL);
}
void
cogl_shader_get_parameteriv (CoglHandle handle,
COGLenum pname,
COGLint *dest)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glGetObjectParameterivARB (shader->gl_handle, pname, dest);
}
CoglShaderType
cogl_shader_get_type (CoglHandle handle)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, COGL_SHADER_TYPE_VERTEX);
if (!cogl_is_shader (handle))
{
g_warning ("Non shader handle type passed to cogl_shader_get_type");
return COGL_SHADER_TYPE_VERTEX;
}
shader = handle;
return shader->type;
}
void
cogl_program_attach_shader (CoglHandle program_handle,
CoglHandle shader_handle)
{
CoglProgram *program;
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_program (program_handle) || !cogl_is_shader (shader_handle))
return;
program = _cogl_program_pointer_from_handle (program_handle);
shader = _cogl_shader_pointer_from_handle (shader_handle);
glAttachObject (program->gl_handle, shader->gl_handle);
}
void
cogl_shader_get_info_log (CoglHandle handle,
guint size,
gchar *buffer)
{
CoglShader *shader;
COGLint len;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glGetInfoLogARB (shader->gl_handle, size-1, &len, buffer);
buffer[len]='\0';
}
gboolean
cogl_shader_is_compiled (CoglHandle handle)
{
GLint status;
CoglShader *shader;
if (!cogl_is_shader (handle))
return FALSE;
shader = _cogl_shader_pointer_from_handle (handle);
GE (glGetShaderiv (shader->gl_handle, GL_COMPILE_STATUS, &status));
if (status == GL_TRUE)
return TRUE;
else
return FALSE;
}
gchar *
cogl_shader_get_info_log (CoglHandle handle)
{
CoglShader *shader;
char buffer[512];
int len = 0;
_COGL_GET_CONTEXT (ctx, NULL);
if (!cogl_is_shader (handle))
return NULL;
shader = _cogl_shader_pointer_from_handle (handle);
glGetShaderInfoLog (shader->gl_handle, 511, &len, buffer);
buffer[len] = '\0';
return g_strdup (buffer);
}
void
cogl_program_attach_shader (CoglHandle program_handle,
CoglHandle shader_handle)
{
CoglProgram *program;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_program (program_handle) || !cogl_is_shader (shader_handle))
return;
program = _cogl_program_pointer_from_handle (program_handle);
program->attached_shaders
= g_slist_prepend (program->attached_shaders,
cogl_handle_ref (shader_handle));
/* Whenever the shader changes we will need to relink the program
with the fixed functionality shaders so we should forget the
cached programs */
_cogl_gles2_clear_cache_for_program (program);
}
