Improved text rendering and fixed a bug with the texture rendering

src/Renderer.c

@@ -1,5 +1,6 @@
 #include "Renderer.h"
 #include "SDL.h"
+#include "SDL_blendmode.h"
 #include "SDL_image.h"
 #include "SDL_platform.h"
 #include "SDL_rect.h"
@@ -31,6 +32,8 @@ Renderer *create_renderer(SDL_Window *window) {
     return NULL;
   }
 
+  SDL_SetRenderDrawBlendMode(renderer->SDL_base_renderer, SDL_BLENDMODE_BLEND);
+
   return renderer;
 }
 
@@ -38,6 +41,11 @@ void get_render_output_size(Renderer *renderer, int32_t *w, int32_t *h) {
   SDL_GetRendererOutputSize(renderer->SDL_base_renderer, w, h);
 }
 
+void set_render_draw_color(const Renderer *renderer, SDL_Color color) {
+  SDL_SetRenderDrawColor(renderer->SDL_base_renderer, color.r, color.g, color.b,
+                         color.a);
+}
+
 void render_clear(const Renderer *renderer, SDL_Color color) {
   if (!renderer || !(renderer->SDL_base_renderer)) {
     return;
@@ -84,7 +92,7 @@ void render_surface(const Renderer *renderer, SDL_Surface *surface,
 
 void render_texture(const Renderer *renderer, SDL_Texture *texture,
                     const RenderRect *src, const RenderRect *dest) {
-  if (!renderer || !texture) {
+  if (!renderer || !texture || !dest) {
     return;
   }
 
@@ -100,7 +108,7 @@ void render_texture(const Renderer *renderer, SDL_Texture *texture,
 
   // TODO (Abdelrahman): Look into using the SDL_RenderCopyExF instead to
   // support rotating the texture
-  SDL_RenderCopyF(renderer->SDL_base_renderer, texture, &src_frect,
+  SDL_RenderCopyF(renderer->SDL_base_renderer, texture, src ? &src_frect : NULL,
                   &dest_frect);
 }