Vincent Povirk : gdiplus: Implement GetPixel for indexed color bitmaps.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 4d53a4c9f540275314111c1e26b2cddbb83a0a8f
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=4d53a4c9f540275314111c1e26...

Author: Vincent Povirk 
Date:   Sat Jan 30 19:01:52 2010 -0600

gdiplus: Implement GetPixel for indexed color bitmaps.

---

dlls/gdiplus/image.c       |   33 ++++++++++++++++++++++++++++++++-
 dlls/gdiplus/tests/image.c |   12 ++++++------
 2 files changed, 38 insertions(+), 7 deletions(-)

diff --git a/dlls/gdiplus/image.c b/dlls/gdiplus/image.c
index 4d6448e..4fd593f 100644
--- a/dlls/gdiplus/image.c
+++ b/dlls/gdiplus/image.c
@@ -94,6 +94,24 @@ GpStatus WINGDIPAPI GdipBitmapCreateApplyEffect(GpBitmap** inputBitmaps,
     return NotImplemented;
 }

+static inline void getpixel_1bppIndexed(BYTE *index, const BYTE *row, UINT x)
+{
+    *index = (row[x/8]>>(7-x%8)) & 1;
+}
+
+static inline void getpixel_4bppIndexed(BYTE *index, const BYTE *row, UINT x)
+{
+    if (x & 1)
+        *index = row[x/2]&0xf;
+    else
+        *index = row[x/2]>>4;
+}
+
+static inline void getpixel_8bppIndexed(BYTE *index, const BYTE *row, UINT x)
+{
+    *index = row[x];
+}
+
 static inline void getpixel_16bppGrayScale(BYTE *r, BYTE *g, BYTE *b, BYTE *a,
     const BYTE *row, UINT x)
 {
@@ -211,6 +229,7 @@ GpStatus WINGDIPAPI GdipBitmapGetPixel(GpBitmap* bitmap, INT x, INT y,
     ARGB *color)
 {
     BYTE r, g, b, a;
+    BYTE index;
     BYTE *row;
     TRACE("%p %d %d %p\n", bitmap, x, y, color);

@@ -222,6 +241,15 @@ GpStatus WINGDIPAPI GdipBitmapGetPixel(GpBitmap* bitmap, INT x, INT y,

switch (bitmap->format)
     {
+        case PixelFormat1bppIndexed:
+            getpixel_1bppIndexed(&index,row,x);
+            break;
+        case PixelFormat4bppIndexed:
+            getpixel_4bppIndexed(&index,row,x);
+            break;
+        case PixelFormat8bppIndexed:
+            getpixel_8bppIndexed(&index,row,x);
+            break;
         case PixelFormat16bppGrayScale:
             getpixel_16bppGrayScale(&r,&g,&b,&a,row,x);
             break;
@@ -260,7 +288,10 @@ GpStatus WINGDIPAPI GdipBitmapGetPixel(GpBitmap* bitmap, INT x, INT y,
             return NotImplemented;
     }

-    *color = a<<24|r<<16|g<<8|b;
+    if (bitmap->format & PixelFormatIndexed)
+        *color = bitmap->image.palette_entries[index];
+    else
+        *color = a<<24|r<<16|g<<8|b;

return Ok;
 }
diff --git a/dlls/gdiplus/tests/image.c b/dlls/gdiplus/tests/image.c
index 53d66e0..10dc21e 100644
--- a/dlls/gdiplus/tests/image.c
+++ b/dlls/gdiplus/tests/image.c
@@ -1181,8 +1181,8 @@ static void test_palette(void)

/* test getting/setting pixels */
     stat = GdipBitmapGetPixel(bitmap, 0, 0, &color);
-    todo_wine expect(Ok, stat);
-    todo_wine expect(0xff000000, color);
+    expect(Ok, stat);
+    expect(0xff000000, color);

stat = GdipBitmapSetPixel(bitmap, 0, 1, 0xffffffff);
     todo_wine ok((stat == Ok) ||
@@ -1214,8 +1214,8 @@ static void test_palette(void)

/* test getting/setting pixels */
     stat = GdipBitmapGetPixel(bitmap, 0, 0, &color);
-    todo_wine expect(Ok, stat);
-    todo_wine expect(0xff000000, color);
+    expect(Ok, stat);
+    expect(0xff000000, color);

stat = GdipBitmapSetPixel(bitmap, 0, 1, 0xffff00ff);
     todo_wine ok((stat == Ok) ||
@@ -1247,8 +1247,8 @@ static void test_palette(void)

/* test getting/setting pixels */
     stat = GdipBitmapGetPixel(bitmap, 0, 0, &color);
-    todo_wine expect(Ok, stat);
-    todo_wine expect(0xff000000, color);
+    expect(Ok, stat);
+    expect(0xff000000, color);

stat = GdipBitmapSetPixel(bitmap, 0, 1, 0xffcccccc);
     todo_wine ok((stat == Ok) ||