Changeset 3032 for libpipi/trunk/pipi/codec/coreimage.mTweet

Timestamp:

Oct 19, 2008, 2:32:42 PM (15 years ago)

Author:

Jean-Yves Lamoureux

Message:

• Convert CoreImage? buffer to RGBA right after loading
• Crop padding while needed, making pitch consistent with (width*bytesperpixel)

File:

• libpipi/trunk/pipi/codec/coreimage.m (modified) (3 diffs)

libpipi/trunk/pipi/codec/coreimage.m

@@ -47 +47 @@
     pipi_image_t *img;
     img = pipi_new(w, h);
-    img->p[PIPI_PIXELS_RGBA_C].pixels = [myImage bitmapData];
+
     img->p[PIPI_PIXELS_RGBA_C].w      = w;
     img->p[PIPI_PIXELS_RGBA_C].h      = h;
@@ -55 +55 @@
     img->last_modified                = PIPI_PIXELS_RGBA_C;
 
+    
+    /* CoreImage feeds us with BGRA while we need RGBA, so convert it.
+     * We also need to get a pitch==(w*bpp) in order to pipi to opper properly.
+     */
+    
+    int pitch = (img->p[PIPI_PIXELS_RGBA_C].bpp/8);
+    unsigned char *tmp  = (unsigned char*)malloc(h*w*pitch);
+    unsigned char *orig = (unsigned char*)[myImage bitmapData];
+    int x, y, k=0, o=0, a=[myImage bytesPerRow] - (w*([myImage bitsPerPixel]/8));
+
+    for(y=0; y<h; y++) 
+    {
+        for(x=0; x<w*pitch; x+=4)
+        {
+            if(!([myImage bitmapFormat] & NSAlphaFirstBitmapFormat))
+            {
+                tmp[k+2] = orig[o];
+                tmp[k+1] = orig[o+1];
+                tmp[k+0] = orig[o+2];
+                tmp[k+3] = orig[o+3];
+            } else
+            {
+                tmp[k+0] = orig[o];
+                tmp[k+1] = orig[o+1];
+                tmp[k+2] = orig[o+2];
+                tmp[k+3] = orig[o+3];                    
+            }
+                
+            o+=4;
+            k+=4;
+        }
+        o+=a;
+    }
+    img->p[PIPI_PIXELS_RGBA_C].pixels = tmp;
+    img->p[PIPI_PIXELS_RGBA_C].pitch  = w*([myImage bitsPerPixel]/8);
+    
+    
+    
+    
     img->codec_priv = (struct pipi_codec_coreimage *) malloc(sizeof(struct pipi_codec_coreimage *));
     struct pipi_codec_coreimage *infos = (struct pipi_codec_coreimage *) img->codec_priv;
@@ -109 +148 @@
     }
     
-    
     [[bitmap representationUsingType:type properties:nil] writeToFile:n  atomically:YES];
     [autoreleasepool release];