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Issue #19: Convert external renderer to GObject. Not yet fully integrated

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This commit is contained in:
Mario Hüttel
2019-06-18 19:42:18 +02:00
parent 302d462cda
commit 7b10d41160
2 changed files with 72 additions and 18 deletions
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31
include/gds-render/output-renderers/external-renderer.h
View File

@@ -24,35 +24,46 @@
*/
/**
* @addtogroup external-renderer
* @addtogroup ExternalRenderer
* @{
*/
#ifndef _EXTERNAL_RENDERER_H_
#define _EXTERNAL_RENDERER_H_
#include <gds-render/output-renderers/gds-output-renderer.h>
#include <gds-render/gds-utils/gds-types.h>
#include <glib.h>
G_BEGIN_DECLS
#define GDS_RENDER_TYPE_EXTERNAL_RENDERER (external_renderer_get_type())
G_DECLARE_FINAL_TYPE(ExternalRenderer, external_renderer, GDS_RENDER, EXTERNAL_RENDERER, GdsOutputRenderer)
/**
* @brief function name expected to be found in external library.
*
* The function has to be defined as follows:
* @code
* int function_name(gds_cell *toplevel, GList *layer_info_list, char *output_file_name)
* int EXTERNAL_LIBRARY_FUNCTION(gds_cell *toplevel, GList *layer_info_list, const char *output_file_name, double scale)
* @endcode
*/
#define EXTERNAL_LIBRARY_FUNCTION "render_cell_to_file"
/**
* @brief external_renderer_render_cell
* @param toplevel_cell The toplevel cell to render
* @param layer_info_list The layer information. Contains #layer_info elements
* @param output_file Output file
* @param so_path Path to the shared object file containing #EXTERNAL_LIBRARY_FUNCTION
* @return 0 on success
* @brief Create new ExternalRenderer object
* @return New object
*/
int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list, char *output_file, char *so_path);
ExternalRenderer *external_renderer_new();
/**
* @brief Create new ExternalRenderer object with specified shared object path
* @param so_path Path to shared object, the rendering function is searched in
* @return New object.
*/
ExternalRenderer *external_renderer_new_with_so(const char *so_path);
G_END_DECLS
#endif /* _EXTERNAL_RENDERER_H_ */

59
output-renderers/external-renderer.c
View File

@@ -24,7 +24,7 @@
*/
/**
* @addtogroup external-renderer
* @addtogroup ExternalRenderer
* @{
*/
@@ -33,10 +33,25 @@
#include <gds-render/output-renderers/external-renderer.h>
int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list,
char *output_file, char *so_path)
struct _ExternalRenderer {
GdsOutputRenderer parent;
const char *shared_object_path;
};
G_DEFINE_TYPE(ExternalRenderer, external_renderer, GDS_RENDER_TYPE_OUTPUT_RENDERER)
/**
* @brief Execute render function in shared object to render the supplied cell
* @param toplevel_cell Cell to render
* @param layer_info_list Layer information (Color etc.)
* @param output_file Destination file
* @param so_path Path to shared object
* @return 0 if successful
*/
static int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list,
const char *output_file, double scale, const char *so_path)
{
int (*so_render_func)(struct gds_cell *, GList *, char *) = NULL;
int (*so_render_func)(struct gds_cell *, GList *, const char *, double) = NULL;
void *so_handle = NULL;
char *error_msg;
int ret = 0;
@@ -48,25 +63,53 @@ int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_i
/* Load shared object */
so_handle = dlopen(so_path, RTLD_LAZY);
if (!so_handle) {
printf("Could not load external library '%s'\nDetailed error is:\n%s\n", so_path, dlerror());
g_error("Could not load external library '%s'\nDetailed error is:\n%s", so_path, dlerror());
return -2000;
}
/* Load symbol from library */
so_render_func = (int (*)(struct gds_cell *, GList *, char *))dlsym(so_handle, EXTERNAL_LIBRARY_FUNCTION);
so_render_func = (int (*)(struct gds_cell *, GList *, const char *, double))dlsym(so_handle, EXTERNAL_LIBRARY_FUNCTION);
error_msg = dlerror();
if (error_msg != NULL) {
printf("Rendering function not found in library:\n%s\n", error_msg);
g_error("Rendering function not found in library:\n%s\n", error_msg);
goto ret_close_so_handle;
}
/* Execute */
if (so_render_func)
so_render_func(toplevel_cell, layer_info_list, output_file);
ret = so_render_func(toplevel_cell, layer_info_list, output_file, scale);
ret_close_so_handle:
dlclose(so_handle);
return ret;
}
static int external_renderer_render_output(GdsOutputRenderer *renderer,
struct gds_cell *cell,
GList *layer_infos,
const char *output_file,
double scale)
{
ExternalRenderer *ext_renderer = GDS_RENDER_EXTERNAL_RENDERER(renderer);
return external_renderer_render_cell(cell, layer_infos, output_file, scale, ext_renderer->shared_object_path);
}
static void external_renderer_class_init(ExternalRendererClass *klass)
{
GdsOutputRendererClass *inherited_parent_class;
inherited_parent_class = GDS_RENDER_OUTPUT_RENDERER_CLASS(klass);
/* Override virtual function */
inherited_parent_class->render_output = external_renderer_render_output;
}
static void external_renderer_init(ExternalRenderer *self)
{
self->shared_object_path = NULL;
}
/** @} */