--- a/libcore/core/texture.c	Mon Nov 02 13:42:51 2020 +0100
+++ b/libcore/core/texture.c	Mon Nov 02 18:35:44 2020 +0100
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 
+#include "color.h"
 #include "error.h"
 #include "texture.h"
 #include "texture_p.h"
@@ -51,6 +52,29 @@
 }
 
 bool
+texture_set_alpha_mod(struct texture *tex, unsigned int alpha)
+{
+	assert(texture_ok(tex));
+	assert(alpha <= 255);
+
+	if (SDL_SetTextureAlphaMod(tex->handle, alpha) < 0)
+		return errorf("%s", SDL_GetError());
+
+	return true;
+}
+
+bool
+texture_set_color_mod(struct texture *tex, unsigned long color)
+{
+	assert(texture_ok(tex));
+
+	if (SDL_SetTextureColorMod(tex->handle, COLOR_R(color), COLOR_G(color), COLOR_B(color)) < 0)
+		return errorf("%s", SDL_GetError());
+
+	return true;
+}
+
+bool
 texture_draw(const struct texture *tex, int x, int y)
 {
 	assert(tex);

--- a/libcore/core/texture.h	Mon Nov 02 13:42:51 2020 +0100
+++ b/libcore/core/texture.h	Mon Nov 02 18:35:44 2020 +0100
@@ -65,6 +65,26 @@
 texture_ok(const struct texture *tex);
 
 /**
+ * Apply an alpha modulation (aka transparency).
+ *
+ * \pre texture_ok(tex)
+ * \param tex the texture
+ * \param alpha the alpha (0-255)
+ */
+bool
+texture_set_alpha_mod(struct texture *tex, unsigned int alpha);
+
+/**
+ * Apply a color modulation (for every pixel).
+ *
+ * \pre texture_ok(tex)
+ * \param tex the texture to modify
+ * \param color the color
+ */
+bool
+texture_set_color_mod(struct texture *tex, unsigned long color);
+
+/**
  * Simple texture drawing.
  *
  * \pre tex != NULL