[PATCH v2] gdi32: fix PatBlt() drawing with negative width/height

[Damjan Jovanovic]

In a (x, y, w, h) rectangle passed to PatBlt(), a negative w results in
the rectangle drawn being (x+w, y, -w, h), and negative h results in
(x, y+h, w, -h). Wine instead does (x+w+1, y, -w, h) and
(x, y+h+1, w, -h), so the rectangle drawn is misplaced:

Windows
 (0,0)
   +------+
   |+-----++
   ||     ||
   ++-----+|
    +------+
           Wine

This patch recalculates the rectangle dimensions correctly.

Try 2 tests brush patterns and multiple DIB/DDB formats.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=27584
Signed-off-by: Damjan Jovanovic 
---
 dlls/gdi32/bitblt.c    | 11 ++++++
 dlls/gdi32/tests/dib.c | 86 ++++++++++++++++++++++++------------------
 2 files changed, 61 insertions(+), 36 deletions(-)