Mercurial > hg > ascension / file diff

--- a/src/ascension/texture.h	Sun May 11 14:51:00 2025 +0200
+++ b/src/ascension/texture.h	Mon May 12 20:51:57 2025 +0200
@@ -28,6 +28,8 @@
 #ifndef ASCENSION_TEXTURE_H
 #define ASCENSION_TEXTURE_H
 
+#include "datatypes.h"
+
 #include <SDL2/SDL_surface.h>
 
 typedef struct AscTexture AscTexture;
@@ -38,6 +40,7 @@
     unsigned width;
     unsigned height;
     unsigned refcount;
+    // TODO: add support for texture atlas - idea: rects are defined in AscTexture and can be indexed
 };
 
 enum asc_texture_target {
@@ -59,6 +62,11 @@
     ASC_TEXTURE_MAG_FILTER_LINEAR
 };
 
+enum asc_texture_scale_mode {
+    ASC_TEXTURE_SCALE_FIT,
+    ASC_TEXTURE_SCALE_REPEAT
+};
+
 __attribute__((__nonnull__))
 void asc_texture_init(
         AscTexture *tex,
@@ -88,4 +96,15 @@
 __attribute__((__nonnull__))
 void asc_texture_from_file(AscTexture *tex, const char *name);
 
+
+/**
+ * Calculates UV scaling factors depending on texture and surface dimensions.
+ *
+ * @param tex the texture
+ * @param surface_dimension the dimensions of the surface the texture is applied to
+ * @param factors additional scaling factors
+ * @return the calculated UV scaling factors
+ */
+asc_vec2f asc_texture_calculate_uv_scale(const AscTexture *tex, asc_vec2u surface_dimension, asc_vec2f factors);
+
 #endif //ASCENSION_TEXTURE_H