From ef0c02cb4dbd5f74fd0cb7c7ef119e4ca1936249 Mon Sep 17 00:00:00 2001
From: Sergey Sharybin <sergey.vfx@gmail.com>
Date: Fri, 6 May 2016 11:48:07 +0200
Subject: Speedup of regular 2D painting

Yet another commit which makes painting aware of multi-threaded systems.
---
 source/blender/imbuf/intern/allocimbuf.c | 81 ++++++++++++++++++--------------
 1 file changed, 46 insertions(+), 35 deletions(-)

(limited to 'source/blender/imbuf/intern/allocimbuf.c')

diff --git a/source/blender/imbuf/intern/allocimbuf.c b/source/blender/imbuf/intern/allocimbuf.c
index 988f43ff9fa..ef3743d9c8a 100644
--- a/source/blender/imbuf/intern/allocimbuf.c
+++ b/source/blender/imbuf/intern/allocimbuf.c
@@ -446,49 +446,60 @@ ImBuf *IMB_allocImBuf(unsigned int x, unsigned int y, uchar planes, unsigned int
 {
 	ImBuf *ibuf;
 
-	ibuf = MEM_callocN(sizeof(ImBuf), "ImBuf_struct");
+	ibuf = MEM_mallocN(sizeof(ImBuf), "ImBuf_struct");
 
 	if (ibuf) {
-		ibuf->x = x;
-		ibuf->y = y;
-		ibuf->planes = planes;
-		ibuf->ftype = IMB_FTYPE_PNG;
-		ibuf->foptions.quality = 15; /* the 15 means, set compression to low ratio but not time consuming */
-		ibuf->channels = 4;  /* float option, is set to other values when buffers get assigned */
-		ibuf->ppm[0] = ibuf->ppm[1] = IMB_DPI_DEFAULT / 0.0254f; /* IMB_DPI_DEFAULT -> pixels-per-meter */
-
-		if (flags & IB_rect) {
-			if (imb_addrectImBuf(ibuf) == false) {
-				IMB_freeImBuf(ibuf);
-				return NULL;
-			}
+		if (!IMB_initImBuf(ibuf, x, y, planes, flags)) {
+			IMB_freeImBuf(ibuf);
+			return NULL;
 		}
-		
-		if (flags & IB_rectfloat) {
-			if (imb_addrectfloatImBuf(ibuf) == false) {
-				IMB_freeImBuf(ibuf);
-				return NULL;
-			}
+	}
+
+	return (ibuf);
+}
+
+bool IMB_initImBuf(struct ImBuf *ibuf,
+                   unsigned int x, unsigned int y,
+                   unsigned char planes, unsigned int flags)
+{
+	memset(ibuf, 0, sizeof(ImBuf));
+
+	ibuf->x = x;
+	ibuf->y = y;
+	ibuf->planes = planes;
+	ibuf->ftype = IMB_FTYPE_PNG;
+	ibuf->foptions.quality = 15; /* the 15 means, set compression to low ratio but not time consuming */
+	ibuf->channels = 4;  /* float option, is set to other values when buffers get assigned */
+	ibuf->ppm[0] = ibuf->ppm[1] = IMB_DPI_DEFAULT / 0.0254f; /* IMB_DPI_DEFAULT -> pixels-per-meter */
+
+	if (flags & IB_rect) {
+		if (imb_addrectImBuf(ibuf) == false) {
+			return false;
 		}
-		
-		if (flags & IB_zbuf) {
-			if (addzbufImBuf(ibuf) == false) {
-				IMB_freeImBuf(ibuf);
-				return NULL;
-			}
+	}
+
+	if (flags & IB_rectfloat) {
+		if (imb_addrectfloatImBuf(ibuf) == false) {
+			return false;
 		}
-		
-		if (flags & IB_zbuffloat) {
-			if (addzbuffloatImBuf(ibuf) == false) {
-				IMB_freeImBuf(ibuf);
-				return NULL;
-			}
+	}
+
+	if (flags & IB_zbuf) {
+		if (addzbufImBuf(ibuf) == false) {
+			return false;
 		}
+	}
 
-		/* assign default spaces */
-		colormanage_imbuf_set_default_spaces(ibuf);
+	if (flags & IB_zbuffloat) {
+		if (addzbuffloatImBuf(ibuf) == false) {
+			return false;
+		}
 	}
-	return (ibuf);
+
+	/* assign default spaces */
+	colormanage_imbuf_set_default_spaces(ibuf);
+
+	return true;
 }
 
 /* does no zbuffers? */
-- 
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