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added support for setting alpha value for global animations
[rocksndiamonds.git]
/
src
/
libgame
/
system.c
diff --git
a/src/libgame/system.c
b/src/libgame/system.c
index a3eae88217bc14c3ee295acea1f721530c7ecec2..2f21541d8e0419b5c938853082051c8075f550fe 100644
(file)
--- a/
src/libgame/system.c
+++ b/
src/libgame/system.c
@@
-601,7
+601,15
@@
void FreeBitmap(Bitmap *bitmap)
Bitmap *CreateBitmapStruct(void)
{
Bitmap *CreateBitmapStruct(void)
{
- return checked_calloc(sizeof(Bitmap));
+ Bitmap *new_bitmap = checked_calloc(sizeof(Bitmap));
+
+ new_bitmap->alpha[0][0] = -1;
+ new_bitmap->alpha[0][1] = -1;
+ new_bitmap->alpha[1][0] = -1;
+ new_bitmap->alpha[1][1] = -1;
+ new_bitmap->alpha_next_blit = -1;
+
+ return new_bitmap;
}
Bitmap *CreateBitmap(int width, int height, int depth)
}
Bitmap *CreateBitmap(int width, int height, int depth)
@@
-772,6
+780,12
@@
static boolean InClippedRectangle(Bitmap *bitmap, int *x, int *y,
return TRUE;
}
return TRUE;
}
+void SetBitmapAlphaNextBlit(Bitmap *bitmap, int alpha)
+{
+ // set alpha value for next blitting of bitmap
+ bitmap->alpha_next_blit = alpha;
+}
+
void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
int src_x, int src_y, int width, int height,
int dst_x, int dst_y)
void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
int src_x, int src_y, int width, int height,
int dst_x, int dst_y)