Use a rendertarget for smooth scaling (Fix #20)

Increase version number

Author: carstene1ns

src/drawing.c

@@ -116,7 +116,7 @@ void statusbar (SDL_Renderer *renderer,SDL_Texture *tiles,int room,int lifes,int
 	SDL_Rect srcnumbers = {0,460,10,10};
 	SDL_Rect desnumbers = {18,178,10,10};
 	SDL_Rect srctext = {0,0,140,20};
-	SDL_Rect destext = {115,176,136,18};
+	SDL_Rect destext = {115,174,140,20};
 
 	/* Show heart and crosses sprites */
 	if (changetiles == 1)

src/ending.c

@@ -2,6 +2,7 @@
 
 #include "ending.h"
 #include "loading.h"
+#include "main.h"
 
 void ending (SDL_Window *screen,uint8_t *state) {
 
@@ -34,7 +35,7 @@ void ending (SDL_Window *screen,uint8_t *state) {
 		SDL_RenderCopy(renderer,tiles,&srcdoor,&desdoor);
 
 		/* Flip */
-		SDL_RenderPresent(renderer);
+		renderpresent(renderer);
 
 	}
 

src/game.c

@@ -240,7 +240,7 @@ void game(SDL_Window *screen,uint8_t *state,uint8_t *grapset,uint8_t *fullscreen
 			blueparchment (renderer,&jean);
 
 		/* Flip ! */
-		SDL_RenderPresent(renderer);
+		renderpresent(renderer);
 
 		if (parchment > 0) {
 			Mix_PlayChannel(-1, fx[2], 0);

src/gameover.c

@@ -2,6 +2,7 @@
 
 #include "gameover.h"
 #include "loading.h"
+#include "main.h"
 
 void gameover (SDL_Window *screen,uint8_t *state) {
 
@@ -12,7 +13,7 @@ void gameover (SDL_Window *screen,uint8_t *state) {
 	SDL_RenderCopy(renderer,gameover,NULL,NULL);
 
 	/* Flip */
-	SDL_RenderPresent(renderer);
+	renderpresent(renderer);
 	Mix_PlayMusic(bso, 0);
 
 	/* Wait */

src/history.c

@@ -2,6 +2,7 @@
 
 #include "history.h"
 #include "loading.h"
+#include "main.h"
 
 void history(SDL_Window *screen,uint8_t *state,uint8_t *grapset,uint8_t *fullscreen) {
 
@@ -119,7 +120,7 @@ void history(SDL_Window *screen,uint8_t *state,uint8_t *grapset,uint8_t *fullscr
 		}
 
 		/* Flip ! */
-		SDL_RenderPresent(renderer);
+		renderpresent(renderer);
 
 	}
 

src/main.c

@@ -41,13 +41,22 @@ int main (int argc, char** argv) {
 	/* Creating window */
 	SDL_Window *screen = SDL_CreateWindow(GAME_TITLE,
 		SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,SCREEN_W * 3,SCREEN_H * 3,
-		fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
+		fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_RESIZABLE);
 
 	/* Create renderer (with VSync, nice !) */
-	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
-	renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED);
+	renderer = SDL_CreateRenderer(screen, -1,
+		SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);
 	SDL_RenderSetLogicalSize(renderer, SCREEN_W, SCREEN_H);
+
+	/* Create a render target for smooth scaling */
+	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
+	SDL_Texture *target = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,
+		SDL_TEXTUREACCESS_TARGET, SCREEN_W, SCREEN_H);
+	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
+	SDL_SetRenderTarget(renderer, target);
+
 	SDL_SetRenderDrawColor(renderer,0,0,0,255);
+	SDL_RenderClear(renderer);
 
 	/* Init joystick if there's one connected */
 	SDL_Joystick *joystick = NULL;
@@ -93,6 +102,7 @@ int main (int argc, char** argv) {
 
 	/* Cleaning */
 	SDL_JoystickClose(joystick);
+	SDL_DestroyTexture(target);
 	SDL_DestroyRenderer(renderer);
 	SDL_DestroyWindow(screen);
 	SDL_Quit();	
@@ -151,3 +161,14 @@ void update_title(SDL_Window *screen, const char* title) {
 	}
 	SDL_SetWindowTitle(screen, buf);
 }
+
+void renderpresent(SDL_Renderer *renderer) {
+	SDL_Texture *target = SDL_GetRenderTarget(renderer);
+	SDL_SetRenderTarget(renderer, NULL);
+
+	SDL_RenderClear(renderer);
+	SDL_RenderCopy(renderer, target, NULL, NULL);
+	SDL_RenderPresent(renderer);
+
+	SDL_SetRenderTarget(renderer, target);
+}

src/main.h

@@ -6,5 +6,6 @@
 
 int check_data();
 void update_title(SDL_Window *screen, const char* title);
+void renderpresent(SDL_Renderer *renderer);
 
-#define GAME_TITLE "Abbaye des Morts v2.0.3"
+#define GAME_TITLE "Abbaye des Morts v2.0.4"

src/startscreen.c

@@ -2,6 +2,7 @@
 
 #include "startscreen.h"
 #include "loading.h"
+#include "main.h"
 
 void startscreen(SDL_Window *screen,uint8_t *state,uint8_t *grapset,uint8_t *fullscreen) {
 
@@ -35,7 +36,7 @@ void startscreen(SDL_Window *screen,uint8_t *state,uint8_t *grapset,uint8_t *ful
                 SDL_RenderCopy(renderer, intromd, &srcintro, &desintro);
 
             /* Flip ! */
-            SDL_RenderPresent(renderer);
+            renderpresent(renderer);
 
             change = 0;