Changeset 195 for trunk/src/helpers/gpih.c

Timestamp:

Aug 5, 2002, 8:57:15 PM (23 years ago)

Author:

umoeller

Message:

Misc fixes.

File:

• trunk/src/helpers/gpih.c (modified) (9 diffs)

trunk/src/helpers/gpih.c

@@ -2507 +2507 @@
  *      replacement for WinDrawPointer that can do clipping.
  *
- *      To do clipping with WinDrawPointer, one has to
- *      alter the clip rectangle for the current HPS,
- *      which involves creating regions and is thus quite
- *      some overhead.
- *
- *      Instead, this function  allows for specifying a clip
- *      rectangle directly. Besides, since it uses GpiWCBitBlt,
- *      it should probably work with all types of device contexts.
+ *      Normally, to do clipping with WinDrawPointer, one
+ *      would have to alter the clip rectangle for the current
+ *      HPS, which requires creating regions and is thus quite
+ *      expensive.
+ *
+ *      Instead, this function allows for specifying a clip
+ *      rectangle directly. It blits the icon bitmaps directly
+ *      without calling WinDrawPointer.
+ *      Besides, since it uses GpiWCBitBlt, it should probably
+ *      work with all types of device contexts.
  *
  *      This also replaces gpihIcon2Bitmap, which wasn't quite
@@ -2522 +2524 @@
  *      If you don't need clipping and are drawing to the
  *      screen only, this function has no advantage over
- *      WinDrawPointer because it's presumably slower.
+ *      WinDrawPointer because it's presumably a bit slower.
  *
  *      Flags presently supported in fl:
@@ -2528 +2530 @@
  *      --  DP_MINI (not DP_MINIICON, as stated in PMREF):
  *          use mini-icon.
+ *
+ *      --  DP_HALFTONED (V0.9.20)
  *
  *      Preconditions:
@@ -2540 +2544 @@
  *
  *@@added V0.9.19 (2002-06-18) [umoeller]
+ *@@changed V0.9.20 (2002-07-31) [umoeller]: optimized, saved one GpiQueryBitmapInfoHeader
+ *@@changed V0.9.20 (2002-08-04) [umoeller]: added DP_HALFTONED
  */
 
@@ -2559 +2565 @@
         POINTL  aptl[4];
         HBITMAP hbmThis;
-        BITMAPINFOHEADER2 bmi;
+        BITMAPINFOHEADER2 bmiAndXor,
+                          bmiColor;
 
         // A HPOINTER really consists of two bitmaps,
@@ -2645 +2652 @@
             GpiSetBackColor(hps, RGBCOL_BLACK);
 
+            if (fl & DP_HALFTONED) // V0.9.20 (2002-08-04) [umoeller]
+                GpiSetPattern(hps, PATSYM_HALFTONE);
+
             /*
              * 1)   work on the AND image
@@ -2656 +2666 @@
                )
             {
-                bmi.cbFix = sizeof(bmi);
-                GpiQueryBitmapInfoHeader(hbmThis, &bmi);
+                bmiAndXor.cbFix = sizeof(bmiAndXor);
+                GpiQueryBitmapInfoHeader(hbmThis, &bmiAndXor);
 
                 // use only half the bitmap height
-                cySrc = bmi.cy / 2;
+                cySrc = bmiAndXor.cy / 2;
 
                 // aptl[2]: source bottom-left
                 aptl[2].x =   0
-                            + lClipLeft   * bmi.cx / cxIcon;
+                            + lClipLeft   * bmiAndXor.cx / cxIcon;
                 aptl[2].y =   cySrc
                             + lClipBottom * cySrc / cyIcon;
 
                 // aptl[3]: source top-right (exclusive!)
-                aptl[3].x =   bmi.cx
-                            - lClipRight  * bmi.cx / cxIcon;
-                aptl[3].y =   bmi.cy
+                aptl[3].x =   bmiAndXor.cx
+                            - lClipRight  * bmiAndXor.cx / cxIcon;
+                aptl[3].y =   bmiAndXor.cy
                             - lClipTop    * cySrc / cyIcon;
 
@@ -2693 +2703 @@
                )
             {
-                bmi.cbFix = sizeof(bmi);
-                GpiQueryBitmapInfoHeader(hbmThis, &bmi);
+                bmiColor.cbFix = sizeof(bmiColor);
+                GpiQueryBitmapInfoHeader(hbmThis, &bmiColor);
 
                 // aptl[2]: source bottom-left
                 aptl[2].x =   0
-                            + lClipLeft   * bmi.cx / cxIcon;
+                            + lClipLeft   * bmiColor.cx / cxIcon;
                 aptl[2].y =   0
-                            + lClipBottom * bmi.cy / cyIcon;
+                            + lClipBottom * bmiColor.cy / cyIcon;
 
                 // aptl[3]: source top-right (exclusive!)
-                aptl[3].x =   bmi.cx
-                            - lClipRight  * bmi.cx / cxIcon;
-                aptl[3].y =   bmi.cy
-                            - lClipTop    * bmi.cy / cyIcon;
+                aptl[3].x =   bmiColor.cx
+                            - lClipRight  * bmiColor.cx / cxIcon;
+                aptl[3].y =   bmiColor.cy
+                            - lClipTop    * bmiColor.cy / cyIcon;
 
                 GpiWCBitBlt(hps,        // target
@@ -2727 +2737 @@
                )
             {
-                bmi.cbFix = sizeof(bmi);
-                GpiQueryBitmapInfoHeader(hbmThis, &bmi);
+                /*  we queried this one above V0.9.20 (2002-07-31) [umoeller]
+                bmiAndXor.cbFix = sizeof(bmiAndXor);
+                GpiQueryBitmapInfoHeader(hbmThis, &bmiAndXor);
+                */
 
                 // use only half the bitmap height
-                cySrc = bmi.cy / 2;
+                cySrc = bmiAndXor.cy / 2;
 
                 // aptl[2]: source bottom-left
                 aptl[2].x =   0
-                            + lClipLeft   * bmi.cx / cxIcon;
+                            + lClipLeft   * bmiAndXor.cx / cxIcon;
                 aptl[2].y =   0
                             + lClipBottom * cySrc / cyIcon;
 
                 // aptl[3]: source top-right (exclusive!)
-                aptl[3].x =   bmi.cx
-                            - lClipRight  * bmi.cx / cxIcon;
+                aptl[3].x =   bmiAndXor.cx
+                            - lClipRight  * bmiAndXor.cx / cxIcon;
                 aptl[3].y =   cySrc
                             - lClipTop    * cySrc / cyIcon;