From ce892407370be42479bb05e9a2faa60a297c9886 Mon Sep 17 00:00:00 2001
From: davidovski <david@davidovski.xyz>
Date: Tue, 11 Jul 2023 21:37:38 +0100
Subject: make render changes on texture rather than image

---
 src/editor.c    |  3 +--
 src/tiled.c     | 38 +++++++++++++++++++++++++++++++-------
 src/tiled.h     |  4 +++-
 src/tiledfile.c | 11 -----------
 4 files changed, 35 insertions(+), 21 deletions(-)

(limited to 'src')

diff --git a/src/editor.c b/src/editor.c
index 52e653f..ac38891 100644
--- a/src/editor.c
+++ b/src/editor.c
@@ -27,12 +27,11 @@ void drawOverlay(Tiled tiled) {
 void modifyTile(Tiled *tiled, int i) {
     if (selectedTile[0] >= 0 && selectedTile[0] < tiled->tiledMap.width
         && selectedTile[1] >= 0 && selectedTile[1] < tiled->tiledMap.height) {
-        printf("%d,%d", selectedTile[0], selectedTile[1]);
         int tile = getTiledMapTile(tiled->tiledMap, selectedTile);
         int tileCount = tiled->tiledMap.atlasSize[0] * tiled->tiledMap.atlasSize[1] + 1;
         tile = (tile + i) % (tileCount);
         setTiledMapTile(tiled->tiledMap, selectedTile, tile);
-        renderTilemapTexture(&tiled->tilemapTexture, tiled->tiledMap);
+        redrawTiledMap(*tiled);
     }
 }
 
diff --git a/src/tiled.c b/src/tiled.c
index 65b9d1d..43afa7b 100644
--- a/src/tiled.c
+++ b/src/tiled.c
@@ -45,14 +45,34 @@ Vector2 translateTiledScreenPosition(Tiled tiled, Vector2 tiledPos) {
     };
 }
 
+void redrawTiledMap(Tiled tiled) {
+    BeginTextureMode(tiled.tilemapTexture);
+    for (int y = 0; y < tiled.tiledMap.height; y++) {
+        for (int x = 0; x < tiled.tiledMap.width; x++) {
+            int i = (tiled.tiledMap.height - y - 1)*tiled.tiledMap.width + x;
+            Color c = (Color){ 
+                tiled.tiledMap.tilelayout[i], 
+                0, 0, 255 
+            };
+            DrawPixel(x, y, c);
+        }
+    }
+    EndTextureMode();
+
+}
+
+
 Tiled initTiled(TiledMap tiledMap) {
     Tiled tiled;
     tiled.tiledMap = tiledMap;
+
     tiled.offset = (Vector2) {0, 0};
     tiled.zoom = 64;
-    tiled.mapSize[0] = tiled.tiledMap.width;
-    tiled.mapSize[1] = tiled.tiledMap.height;
+
+    tiled.mapSize[0] = tiledMap.width;
+    tiled.mapSize[1] = tiledMap.height;
     tiled.targetTexture = LoadRenderTexture(1, 1);
+    tiled.tilemapTexture = LoadRenderTexture(tiledMap.width, tiledMap.width);
 
     tiled.atlasSize[0] = tiledMap.atlasSize[0];
     tiled.atlasSize[1] = tiledMap.atlasSize[1];
@@ -63,7 +83,7 @@ Tiled initTiled(TiledMap tiledMap) {
             tiledMap.atlasSize[1] * tiledMap.tileSize);
 
 
-    renderTilemapTexture(&tiled.tilemapTexture, tiled.tiledMap);
+    redrawTiledMap(tiled);
     initTiledShader(&tiled);
     return tiled;
 }
@@ -73,20 +93,20 @@ void setTiledShaderUniforms(Tiled tiled) {
     SetShaderValue(tiled.shader, tiled.zoomLoc, &tiled.zoom, SHADER_UNIFORM_FLOAT);
 
     SetShaderValue(tiled.shader, tiled.atlasSizeLoc, &tiled.atlasSize, SHADER_UNIFORM_IVEC2);
-    SetShaderValue(tiled.shader, tiled.mapSizeLoc, &tiled.tilemapTexture.width, SHADER_UNIFORM_IVEC2);
+    SetShaderValue(tiled.shader, tiled.mapSizeLoc, &tiled.mapSize, SHADER_UNIFORM_IVEC2);
 
     SetShaderValueTexture(tiled.shader, tiled.atlasTextureLoc, tiled.atlasTexture);
-    SetShaderValueTexture(tiled.shader, tiled.tilemapTextureLoc, tiled.tilemapTexture);
+    SetShaderValueTexture(tiled.shader, tiled.tilemapTextureLoc, tiled.tilemapTexture.texture);
 }
 
 void unloadTiled(Tiled *tiled) {
     UnloadShader(tiled->shader);
     UnloadTexture(tiled->atlasTexture);
-    UnloadTexture(tiled->tilemapTexture);
+    UnloadRenderTexture(tiled->tilemapTexture);
     UnloadRenderTexture(tiled->targetTexture);
 }
-
 void drawTiled(Tiled *tiled) {
+    //renderTiledMapTexture(tiled->tiledMap, tiled->tilemapTexture);
     BeginShaderMode(tiled->shader);
     setTiledShaderUniforms(*tiled);
 
@@ -95,6 +115,10 @@ void drawTiled(Tiled *tiled) {
             (Vector2){0, 0},
             WHITE);
     EndShaderMode();
+    //DrawTextureRec(tiled->tilemapTexture.texture,
+            //(Rectangle){0, 0, GetScreenWidth(), GetScreenHeight()},
+            //(Vector2){0, 0},
+            //WHITE);
 }
 
 int launchTiledView() {
diff --git a/src/tiled.h b/src/tiled.h
index e1f1c79..735c3a9 100644
--- a/src/tiled.h
+++ b/src/tiled.h
@@ -14,8 +14,8 @@ typedef struct Tiled {
     int mapSize[2];
 
     Texture2D atlasTexture;
-    Texture2D tilemapTexture;
 
+    RenderTexture2D tilemapTexture;
     RenderTexture2D targetTexture;
     Shader shader; 
 
@@ -36,3 +36,5 @@ Vector2 translateTiledScreenPosition(Tiled tiled, Vector2 tiledPos);
 Tiled initTiled(TiledMap tiledMap);
 void drawTiled(Tiled *tiled);
 void unloadTiled(Tiled *tiled);
+void redrawTiledMap(Tiled tiled);
+
diff --git a/src/tiledfile.c b/src/tiledfile.c
index bf0a828..64a1e0d 100644
--- a/src/tiledfile.c
+++ b/src/tiledfile.c
@@ -20,17 +20,6 @@ void textureFromPixels(Texture2D *texOut, Color *pixels, int width, int height)
     UnloadImage(checkedIm);
 }
 
-void renderTilemapTexture(Texture2D *texOut, TiledMap tiledMap) {
-    Color *pixels = (Color*) malloc(tiledMap.width * tiledMap.height * sizeof(Color));
-
-    for (int i = 0; i < tiledMap.width*tiledMap.height; i++) {
-        pixels[i] = (Color){ tiledMap.tilelayout[i], 0, 0, 0 };
-    }
-
-    textureFromPixels(texOut, pixels, tiledMap.width, tiledMap.height);
-}
-
-
 //! read rgba image from file
 void readrgba(Texture2D *loc, int width, int height, FILE *file) {
     Color *pixels = malloc(width*height*4);
-- 
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