From b7bb74caa20dbb85ae22da8d74f0b8f2e657f5ad Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Sat, 11 Dec 2021 12:58:26 +0100
Subject: Add blend modes

---
 sdl2/blendmode.ha | 11 +++++++++++
 sdl2/render.ha    | 11 +++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 sdl2/blendmode.ha

(limited to 'sdl2')

diff --git a/sdl2/blendmode.ha b/sdl2/blendmode.ha
new file mode 100644
index 0000000..a32e537
--- /dev/null
+++ b/sdl2/blendmode.ha
@@ -0,0 +1,11 @@
+// TODO: Flesh me out
+
+// The blend mode used in SDL_RenderCopy() and drawing operations.
+export type blend_mode = enum {
+    NONE = 0x00000000,
+    BLEND = 0x00000001,
+    ADD = 0x00000002,
+    MOD = 0x00000004,
+    MUL = 0x00000008,
+    INVALID = 0x7FFFFFFF
+};
diff --git a/sdl2/render.ha b/sdl2/render.ha
index 0bba541..19c3940 100644
--- a/sdl2/render.ha
+++ b/sdl2/render.ha
@@ -139,6 +139,17 @@ export fn set_texture_alpha_mod(texture: *texture, a: u8) (void | error) = {
 	return wrapvoid(_set_texture_alpha_mod(texture, a));
 };
 
+@symbol("SDL_SetTextureBlendMode") fn _set_texture_blend_mode(
+	texture: *texture, mode: blend_mode) int;
+
+// Set the blend mode for a texture, used by SDL_RenderCopy().
+export fn set_texture_blend_mode(
+	texture: *texture,
+	mode: blend_mode,
+) (void | error) = {
+	return wrapvoid(_set_texture_blend_mode(texture, mode));
+};
+
 @symbol("SDL_RenderCopy") fn _render_copy(renderer: *renderer,
 	texture: *texture, srcrect: nullable *rect, dstrect: nullable *rect) int;
 
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