add font caching

src/text.c

@@ -1,8 +1,50 @@
 #include "text.h"
+#include <SDL2/SDL_log.h>
 
-RenderObject_t text_renderText(Position position, SDL_Color color, TTF_Font* font, char* format, ...){
+#define FONT_CACHE_SIZE 100
+#define MAX_TEXT_SIZE 100
 
-    char text[100];
+typedef struct FontCacheObject {
+    char* file;
+    int size;
+    TTF_Font* font;
+} FontCacheObject_t;
+
+FontCacheObject_t fontCache[FONT_CACHE_SIZE];
+unsigned fontCacheSize = 0;
+
+void text_freeFontCache(){
+    for(unsigned i = 0; i < fontCacheSize; ++i){
+        free(fontCache[i].file);
+        TTF_CloseFont(fontCache[i].font);
+    }
+}
+
+int text_renderText(RenderObject_t* renderObject, Position position, SDL_Color color, const char* fontFilename, int fontSize, char* format, ...){
+
+    TTF_Font* font = NULL;
+    for(unsigned i = 0; i < fontCacheSize; ++i){
+        if(strcmp(fontCache[i].file, fontFilename) && fontCache[i].size == fontSize){
+            font = fontCache[i].font;
+            break;
+        }
+    }
+    if(font == NULL) {
+        font = TTF_OpenFont(fontFilename, fontSize);
+        if(font == NULL) {
+            SDL_LogError(SDL_LOG_PRIORITY_ERROR, "TTF_OpenFont");
+            return -1;
+        }
+        FontCacheObject_t fontCacheObject;
+        fontCacheObject.file = (char*)malloc(strlen(fontFilename) + 1);
+        strcpy(fontCacheObject.file, fontFilename);
+        fontCacheObject.size = fontSize;
+        fontCacheObject.font = font;
+        fontCache[fontCacheSize] = fontCacheObject;
+        ++fontCacheSize;
+    }
+
+    char text[MAX_TEXT_SIZE];
     va_list args;
 
 	memset(&text, '\0', sizeof(text));
@@ -11,14 +53,13 @@ RenderObject_t text_renderText(Position position, SDL_Color color, TTF_Font* fon
 	vsprintf(text, format, args);
 	va_end(args);
 
-
-    RenderObject_t renderObject;
     SDL_Surface* surface = TTF_RenderText_Blended(font, text, color);
 
 
-    renderObject.x = position.x;
-    renderObject.y = position.y;
-    renderObject.z = position.z;
-    renderObject.surface = surface;
-    return renderObject;
+    renderObject->x = position.x;
+    renderObject->y = position.y;
+    renderObject->z = position.z;
+    renderObject->surface = surface;
+
+    return 0;
 }

src/text.h

@@ -1,8 +1,6 @@
 #include <SDL/SDL_ttf.h>
 #include "renderer.h"
 
-
-
 typedef struct {
     int x;
     int y;
@@ -10,4 +8,6 @@ typedef struct {
 } Position;
 
 
-RenderObject_t text_renderText(Position position, SDL_Color color, TTF_Font* font, char* format, ...);
+int text_renderText(RenderObject_t* renderObject, Position position, SDL_Color color, const char* fontFilename, int fontSize, char* format, ...);
+
+void text_freeFontCache();