1 files changed, 59 insertions, 30 deletions
diff --git a/src/textures.c b/src/textures.c
index ddcecf73..ccab3bef 100644
--- a/src/textures.c
+++ b/src/textures.c
@@ -3200,39 +3200,68 @@ void DrawTexturePro(Texture2D texture, Rectangle source, Rectangle dest, Vector2
         if (source.width < 0) { flipX = true; source.width *= -1; }
         if (source.height < 0) source.y -= source.height;
 
-        rlEnableTexture(texture.id);
+        Vector2 bl = { 0 };
+        Vector2 br = { 0 };
+        Vector2 tr = { 0 };
+        Vector2 tl = { 0 };
 
-        rlPushMatrix();
-            rlTranslatef(dest.x, dest.y, 0.0f);
-            rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
-            rlTranslatef(-origin.x, -origin.y, 0.0f);
+        // Only calculate rotation if needed
+        if (rotation == 0.0f)
+        {
+            float x = dest.x - origin.x;
+            float y = dest.y - origin.y;
+            bl = (Vector2){ x, y };
+            br = (Vector2){ x, y + dest.height };
+            tr = (Vector2){ x + dest.width, y + dest.height };
+            tl = (Vector2){ x + dest.width, y };
+        }
+        else
+        {
+            float sinRotation = sinf(rotation * DEG2RAD);
+            float cosRotation = cosf(rotation * DEG2RAD);
+            float x = dest.x;
+            float y = dest.y;
+            float dx = -origin.x;
+            float dy = -origin.y;
 
-            rlBegin(RL_QUADS);
-                rlColor4ub(tint.r, tint.g, tint.b, tint.a);
-                rlNormal3f(0.0f, 0.0f, 1.0f);                          // Normal vector pointing towards viewer
-
-                // Bottom-left corner for texture and quad
-                if (flipX) rlTexCoord2f((source.x + source.width)/width, source.y/height);
-                else rlTexCoord2f(source.x/width, source.y/height);
-                rlVertex2f(0.0f, 0.0f);
-
-                // Bottom-right corner for texture and quad
-                if (flipX) rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height);
-                else rlTexCoord2f(source.x/width, (source.y + source.height)/height);
-                rlVertex2f(0.0f, dest.height);
-
-                // Top-right corner for texture and quad
-                if (flipX) rlTexCoord2f(source.x/width, (source.y + source.height)/height);
-                else rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height);
-                rlVertex2f(dest.width, dest.height);
-
-                // Top-left corner for texture and quad
-                if (flipX) rlTexCoord2f(source.x/width, source.y/height);
-                else rlTexCoord2f((source.x + source.width)/width, source.y/height);
-                rlVertex2f(dest.width, 0.0f);
-            rlEnd();
-        rlPopMatrix();
+            bl.x = x + dx * cosRotation - (dy + dest.height) * sinRotation;
+            bl.y = y + dx * sinRotation + (dy + dest.height) * cosRotation;
+
+            br.x = x + (dx + dest.width) * cosRotation - (dy + dest.height) * sinRotation;
+            br.y = y + (dx + dest.width) * sinRotation + (dy + dest.height) * cosRotation;
 
+            tr.x = x + (dx + dest.width) * cosRotation - dy * sinRotation;
+            tr.y = y + (dx + dest.width) * sinRotation + dy * cosRotation;
+
+            tl.x = x + dx * cosRotation - dy * sinRotation;
+            tl.y = y + dx * sinRotation + dy * cosRotation;
+        }
+
+        rlEnableTexture(texture.id);
+        rlBegin(RL_QUADS);
+            rlColor4ub(tint.r, tint.g, tint.b, tint.a);
+            rlNormal3f(0.0f, 0.0f, 1.0f);                          // Normal vector pointing towards viewer
+
+            // Bottom-left corner for texture and quad
+            if (flipX) rlTexCoord2f((source.x + source.width)/width, source.y/height);
+            else rlTexCoord2f(source.x/width, source.y/height);
+            rlVertex2f(bl.x, bl.y);
+
+            // Bottom-right corner for texture and quad
+            if (flipX) rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height);
+            else rlTexCoord2f(source.x/width, (source.y + source.height)/height);
+            rlVertex2f(br.x, br.y);
+
+            // Top-right corner for texture and quad
+            if (flipX) rlTexCoord2f(source.x/width, (source.y + source.height)/height);
+            else rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height);
+            rlVertex2f(tr.x, tr.y);
+
+            // Top-left corner for texture and quad
+            if (flipX) rlTexCoord2f(source.x/width, source.y/height);
+            else rlTexCoord2f((source.x + source.width)/width, source.y/height);
+            rlVertex2f(tl.x, tl.y);
+        rlEnd();
         rlDisableTexture();
     }
 }