static unsigned get_xml_shaders(const char *path, struct shader_program *prog, size_t size)
{
LIBXML_TEST_VERSION;
xmlParserCtxtPtr ctx = xmlNewParserCtxt();
if (!ctx)
{
RARCH_ERR("Failed to load libxml2 context.\n");
return false;
}
RARCH_LOG("Loading XML shader: %s\n", path);
xmlDocPtr doc = xmlCtxtReadFile(ctx, path, NULL, 0);
xmlNodePtr head = NULL;
xmlNodePtr cur = NULL;
unsigned num = 0;
if (!doc)
{
RARCH_ERR("Failed to parse XML file: %s\n", path);
goto error;
}
#ifdef HAVE_LIBXML2
if (ctx->valid == 0)
{
RARCH_ERR("Cannot validate XML shader: %s\n", path);
goto error;
}
#endif
head = xmlDocGetRootElement(doc);
for (cur = head; cur; cur = cur->next)
{
if (cur->type != XML_ELEMENT_NODE)
continue;
if (strcmp((const char*)cur->name, "shader") != 0)
continue;
char attr[64];
xml_get_prop(attr, sizeof(attr), cur, "language");
if (strcmp(attr, "GLSL") != 0)
continue;
xml_get_prop(attr, sizeof(attr), cur, "style");
glsl_modern = strcmp(attr, "GLES2") == 0;
if (glsl_modern)
RARCH_LOG("[GL]: Shader reports a GLES2 style shader.\n");
break;
}
if (!cur) // We couldn't find any GLSL shader :(
goto error;
memset(prog, 0, sizeof(struct shader_program) * size);
// Iterate to check if we find fragment and/or vertex shaders.
for (cur = cur->children; cur && num < size; cur = cur->next)
{
if (cur->type != XML_ELEMENT_NODE)
continue;
char *content = xml_get_content(cur);
if (!content)
continue;
if (strcmp((const char*)cur->name, "vertex") == 0)
{
if (prog[num].vertex)
{
RARCH_ERR("Cannot have more than one vertex shader in a program.\n");
free(content);
goto error;
}
content = xml_replace_if_file(content, path, cur, "src");
if (!content)
{
RARCH_ERR("Shader source file was provided, but failed to read.\n");
goto error;
}
prog[num].vertex = content;
}
else if (strcmp((const char*)cur->name, "fragment") == 0)
{
if (glsl_modern && !prog[num].vertex)
{
RARCH_ERR("Modern GLSL was chosen and vertex shader was not provided. This is an error.\n");
free(content);
goto error;
}
content = xml_replace_if_file(content, path, cur, "src");
if (!content)
{
RARCH_ERR("Shader source file was provided, but failed to read.\n");
goto error;
}
prog[num].fragment = content;
if (!get_xml_attrs(&prog[num], cur))
{
RARCH_ERR("XML shader attributes do not comply with specifications.\n");
goto error;
}
num++;
}
else if (strcmp((const char*)cur->name, "texture") == 0)
{
free(content);
if (!get_texture_image(path, cur))
{
RARCH_ERR("Texture image failed to load.\n");
goto error;
}
}
else if (strcmp((const char*)cur->name, "import") == 0)
{
free(content);
if (!get_import_value(cur))
{
RARCH_ERR("Import value is invalid.\n");
goto error;
}
}
#ifdef HAVE_PYTHON
else if (strcmp((const char*)cur->name, "script") == 0)
{
free(content);
if (!get_script(path, cur))
{
RARCH_ERR("Script is invalid.\n");
goto error;
}
}
#endif
}
if (num == 0)
{
RARCH_ERR("Couldn't find vertex shader nor fragment shader in XML file.\n");
goto error;
}
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctx);
return num;
error:
RARCH_ERR("Failed to load XML shader ...\n");
if (doc)
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctx);
return 0;
}
static unsigned get_xml_shaders(const char *path, struct shader_program *prog, size_t size)
{
LIBXML_TEST_VERSION;
xmlParserCtxtPtr ctx = xmlNewParserCtxt();
if (!ctx)
{
RARCH_ERR("Failed to load libxml2 context.\n");
return false;
}
RARCH_LOG("Loading XML shader: %s\n", path);
xmlDocPtr doc = xmlCtxtReadFile(ctx, path, NULL, 0);
xmlNodePtr head = NULL;
xmlNodePtr cur = NULL;
unsigned num = 0;
if (!doc)
{
RARCH_ERR("Failed to parse XML file: %s\n", path);
goto error;
}
if (ctx->valid == 0)
{
RARCH_ERR("Cannot validate XML shader: %s\n", path);
goto error;
}
head = xmlDocGetRootElement(doc);
for (cur = head; cur; cur = cur->next)
{
if (cur->type == XML_ELEMENT_NODE && strcmp((const char*)cur->name, "shader") == 0)
{
xmlChar *attr;
attr = xmlGetProp(cur, (const xmlChar*)"language");
if (attr && strcmp((const char*)attr, "GLSL") == 0)
{
xmlFree(attr);
break;
}
if (attr)
xmlFree(attr);
}
}
if (!cur) // We couldn't find any GLSL shader :(
goto error;
memset(prog, 0, sizeof(struct shader_program) * size);
// Iterate to check if we find fragment and/or vertex shaders.
for (cur = cur->children; cur && num < size; cur = cur->next)
{
if (cur->type != XML_ELEMENT_NODE)
continue;
xmlChar *content = xmlNodeGetContent(cur);
if (!content)
continue;
if (strcmp((const char*)cur->name, "vertex") == 0)
{
if (prog[num].vertex)
{
RARCH_ERR("Cannot have more than one vertex shader in a program.\n");
xmlFree(content);
goto error;
}
prog[num].vertex = (char*)content;
}
else if (strcmp((const char*)cur->name, "fragment") == 0)
{
prog[num].fragment = (char*)content;
if (!get_xml_attrs(&prog[num], cur))
{
RARCH_ERR("XML shader attributes do not comply with specifications.\n");
goto error;
}
num++;
}
else if (strcmp((const char*)cur->name, "texture") == 0)
{
if (!get_texture_image(path, cur))
{
RARCH_ERR("Texture image failed to load.\n");
goto error;
}
}
else if (strcmp((const char*)cur->name, "import") == 0)
{
if (!get_import_value(cur))
{
RARCH_ERR("Import value is invalid.\n");
goto error;
}
}
#ifdef HAVE_PYTHON
else if (strcmp((const char*)cur->name, "script") == 0)
{
if (!get_script(path, cur))
{
RARCH_ERR("Script is invalid.\n");
goto error;
}
}
#endif
}
if (num == 0)
{
RARCH_ERR("Couldn't find vertex shader nor fragment shader in XML file.\n");
goto error;
}
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctx);
return num;
error:
RARCH_ERR("Failed to load XML shader ...\n");
if (doc)
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctx);
return 0;
}
