Add plugin support (-p option)

include/args_parser.h

@@ -8,7 +8,7 @@
 
 typedef struct gsr_egl gsr_egl;
 
-#define NUM_ARGS 30
+#define NUM_ARGS 31
 
 typedef enum {
     ARG_TYPE_STRING,

include/egl.h

@@ -105,6 +105,7 @@ typedef void(*__GLXextFuncPtr)(void);
 #define GL_RGBA                                 0x1908
 #define GL_RGB8                                 0x8051
 #define GL_RGBA8                                0x8058
+#define GL_RGBA16                               0x805B
 #define GL_R8                                   0x8229
 #define GL_RG8                                  0x822B
 #define GL_R16                                  0x822A

include/plugins.h

@@ -0,0 +1,38 @@
+#ifndef GSR_PLUGINS_H
+#define GSR_PLUGINS_H
+
+#include "../plugin/plugin.h"
+#include <stdbool.h>
+#include "color_conversion.h"
+
+#define GSR_MAX_PLUGINS 128
+
+typedef bool (*gsr_plugin_init_func)(const gsr_plugin_init_params *params, gsr_plugin_init_return *ret);
+typedef void (*gsr_plugin_deinit_func)(void *userdata);
+
+typedef struct {
+    gsr_plugin_init_return data;
+    void *lib;
+    gsr_plugin_init_func gsr_plugin_init;
+    gsr_plugin_deinit_func gsr_plugin_deinit;
+} gsr_plugin;
+
+typedef struct {
+    gsr_plugin plugins[GSR_MAX_PLUGINS];
+    int num_plugins;
+
+    gsr_plugin_init_params init_params;
+    gsr_egl *egl;
+
+    unsigned int texture;
+    gsr_color_conversion color_conversion;
+} gsr_plugins;
+
+bool gsr_plugins_init(gsr_plugins *self, gsr_plugin_init_params init_params, gsr_egl *egl);
+/* Plugins are unloaded in reverse order */
+void gsr_plugins_deinit(gsr_plugins *self);
+
+bool gsr_plugins_load_plugin(gsr_plugins *self, const char *plugin_filepath);
+void gsr_plugins_draw(gsr_plugins *self);
+
+#endif /* GSR_PLUGINS_H */