From 4354bf70a42118d03ee0ec1dbe229c1b6ca751c8 Mon Sep 17 00:00:00 2001
From: jylam <jylam@92316355-f0b4-4df1-b90c-862c8a59935f>
Date: Sun, 19 Oct 2008 12:32:42 +0000
Subject: [PATCH]  * Convert CoreImage buffer to RGBA right after loading  *
 Crop padding while needed, making pitch consistent with (width*bytesperpixel)

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3032 92316355-f0b4-4df1-b90c-862c8a59935f
---
 pipi/codec/coreimage.m | 42 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/pipi/codec/coreimage.m b/pipi/codec/coreimage.m
index 4e4a8b3..1a70f04 100644
--- a/pipi/codec/coreimage.m
+++ b/pipi/codec/coreimage.m
@@ -46,7 +46,7 @@ pipi_image_t *pipi_load_coreimage(const char *name)
 
     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;
     img->p[PIPI_PIXELS_RGBA_C].pitch  = ([myImage bytesPerRow]/8) * img->w;
@@ -54,6 +54,45 @@ pipi_image_t *pipi_load_coreimage(const char *name)
     img->p[PIPI_PIXELS_RGBA_C].bytes  = ([myImage bitsPerPixel]/8) * img->w * img->h;
     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;
     infos->format = [myImage bitmapFormat];
@@ -108,7 +147,6 @@ int pipi_save_coreimage(pipi_image_t *img, const char *name)
         else if(!strncasecmp(ext, ".j2k",  3)) type = NSJPEG2000FileType;
     }
     
-    
     [[bitmap representationUsingType:type properties:nil] writeToFile:n  atomically:YES];
     [autoreleasepool release];