From 6b0e224c1bc6b4f44657249240d47e9f23199c89 Mon Sep 17 00:00:00 2001
From: Jay Sorg <jay.sorg@gmail.com>
Date: Sun, 4 May 2014 18:17:17 -0700
Subject: [PATCH] xorg: add capture 16x16 aligned

---
 xorg/server/module/rdpCapture.c | 123 ++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)

diff --git a/xorg/server/module/rdpCapture.c b/xorg/server/module/rdpCapture.c
index 189f313a..00e38495 100644
--- a/xorg/server/module/rdpCapture.c
+++ b/xorg/server/module/rdpCapture.c
@@ -298,6 +298,7 @@ rdpCapture0(RegionPtr in_reg, BoxPtr *out_rects, int *num_out_rects,
 }
 
 /******************************************************************************/
+/* make out_rects always multiple of 16 width and height */
 static Bool
 rdpCapture1(RegionPtr in_reg, BoxPtr *out_rects, int *num_out_rects,
             void *src, int src_width, int src_height,
@@ -305,6 +306,128 @@ rdpCapture1(RegionPtr in_reg, BoxPtr *out_rects, int *num_out_rects,
             void *dst, int dst_width, int dst_height,
             int dst_stride, int dst_format, int max_rects)
 {
+    BoxPtr psrc_rects;
+    BoxRec rect;
+    RegionRec reg;
+    char *src_rect;
+    char *dst_rect;
+    int num_regions;
+    int bytespp;
+    int src_bytespp;
+    int dst_bytespp;
+    int width;
+    int height;
+    int min_width;
+    int min_height;
+    int src_offset;
+    int dst_offset;
+    int bytes;
+    int i;
+    int j;
+    int k;
+    int red;
+    int green;
+    int blue;
+    Bool rv;
+    unsigned int *s32;
+    unsigned int *d32;
+    unsigned short *d16;
+    unsigned char *d8;
+
+    LLOGLN(10, ("rdpCapture0:"));
+
+    rv = TRUE;
+
+    min_width = min(dst_width, src_width);
+    min_height = min(dst_height, src_height);
+
+    rect.x1 = 0;
+    rect.y1 = 0;
+    rect.x2 = min_width;
+    rect.y2 = min_height;
+    rdpRegionInit(&reg, &rect, 0);
+    rdpRegionIntersect(&reg, in_reg, &reg);
+
+    num_regions = REGION_NUM_RECTS(&reg);
+
+    if (num_regions > max_rects)
+    {
+        num_regions = 1;
+        psrc_rects = rdpRegionExtents(&reg);
+    }
+    else
+    {
+        psrc_rects = REGION_RECTS(&reg);
+    }
+
+    if (num_regions < 1)
+    {
+        return FALSE;
+    }
+
+    *num_out_rects = num_regions;
+
+    *out_rects = (BoxPtr) g_malloc(sizeof(BoxRec) * num_regions, 0);
+    for (i = 0; i < num_regions; i++)
+    {
+        rect = psrc_rects[i];
+        width = rect.x2 - rect.x1;
+        height = rect.y2 - rect.y1;
+        width = (width + 15) & ~15;
+        height = (height + 15) & ~15;
+        rect.x2 = rect.x1 + width;
+        rect.y2 = rect.y1 + height;
+        if (rect.x2 > min_width)
+        {
+            rect.x2 = min_width;
+            rect.x1 = min_width - 16;
+        }
+        if (rect.y2 > min_height)
+        {
+            rect.y2 = min_height;
+            rect.y1 = min_height - 16;
+        }
+        (*out_rects)[i] = rect;
+    }
+
+    if ((src_format == XRDP_a8r8g8b8) && (dst_format == XRDP_a8b8g8r8))
+    {
+        src_bytespp = 4;
+        dst_bytespp = 4;
+
+        for (i = 0; i < num_regions; i++)
+        {
+            /* get rect to copy */
+            rect = (*out_rects)[i];
+
+            /* get rect dimensions */
+            width = rect.x2 - rect.x1;
+            height = rect.y2 - rect.y1;
+
+            /* point to start of each rect in respective memory */
+            src_offset = rect.y1 * src_stride + rect.x1 * src_bytespp;
+            dst_offset = rect.y1 * dst_stride + rect.x1 * dst_bytespp;
+            src_rect = src + src_offset;
+            dst_rect = dst + dst_offset;
+
+            /* copy one line at a time */
+            for (j = 0; j < height; j++)
+            {
+                s32 = (unsigned int *) src_rect;
+                d32 = (unsigned int *) dst_rect;
+                for (k = 0; k < width; k++)
+                {
+                    SPLITCOLOR32(red, green, blue, *s32);
+                    *d32 = COLOR24(red, green, blue);
+                    s32++;
+                    d32++;
+                }
+                src_rect += src_stride;
+                dst_rect += dst_stride;
+            }
+        }
+    }
+
     return FALSE;
 }