Moving image drawing code into the driver system

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11060 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 5 insertions, 580 deletions

diff --git a/src/fl_draw_image.cxx b/src/fl_draw_image.cxx
index 70718e657..bcd7e9e4a 100644
--- a/src/fl_draw_image.cxx
+++ b/src/fl_draw_image.cxx
@@ -26,589 +26,14 @@
 // the "delta" and "linedelta", making them negative, though this may
 // defeat some of the shortcuts in translating the image for X.
 
+// FIXME: use the correct macros for these conditions
+// FIXME: eventuay get rid of this file and use the source files as modules.
 #ifdef WIN32
-#  include "fl_draw_image_win32.cxx"
+#  include "drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx"
 #elif defined(__APPLE__)
-#  include "fl_draw_image_mac.cxx"
-#elif defined(FL_PORTING)
-#  pragma message "FL_PORTING: implement image drawing in its own file"
-#  include <FL/x.H>
-void fl_rectf(int x, int y, int w, int h, uchar r, uchar g, uchar b) { }
+#  include "drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx"
 #else
-
-// A list of assumptions made about the X display:
-
-// bits_per_pixel must be one of 8, 16, 24, 32.
-
-// scanline_pad must be a power of 2 and greater or equal to 8.
-
-// PsuedoColor visuals must have 8 bits_per_pixel (although the depth
-// may be less than 8).  This is the only limitation that affects any
-// modern X displays, you can't use 12 or 16 bit colormaps.
-
-// The mask bits in TrueColor visuals for each color are
-// contiguous and have at least one bit of each color.  This
-// is not checked for.
-
-// For 24 and 32 bit visuals there must be at least 8 bits of each color.
-
-////////////////////////////////////////////////////////////////
-
-#  include <FL/Fl.H>
-#  include <FL/fl_draw.H>
-#  include <FL/x.H>
-#  include "Fl_XColor.H"
-#  include "flstring.h"
-
-static XImage xi;	// template used to pass info to X
-static int bytes_per_pixel;
-static int scanline_add;
-static int scanline_mask;
-
-static void (*converter)(const uchar *from, uchar *to, int w, int delta);
-static void (*mono_converter)(const uchar *from, uchar *to, int w, int delta);
-
-static int dir;		// direction-alternator
-static int ri,gi,bi;	// saved error-diffusion value
-
-#  if USE_COLORMAP
-////////////////////////////////////////////////////////////////
-// 8-bit converter with error diffusion
-
-static void color8_converter(const uchar *from, uchar *to, int w, int delta) {
-  int r=ri, g=gi, b=bi;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    to = to+(w-1);
-    d = -delta;
-    td = -1;
-  } else {
-    dir = 1;
-    d = delta;
-    td = 1;
-  }
-  for (; w--; from += d, to += td) {
-    r += from[0]; if (r < 0) r = 0; else if (r>255) r = 255;
-    g += from[1]; if (g < 0) g = 0; else if (g>255) g = 255;
-    b += from[2]; if (b < 0) b = 0; else if (b>255) b = 255;
-    Fl_Color i = fl_color_cube(r*FL_NUM_RED/256,g*FL_NUM_GREEN/256,b*FL_NUM_BLUE/256);
-    Fl_XColor& xmap = fl_xmap[0][i];
-    if (!xmap.mapped) {if (!fl_redmask) fl_xpixel(r,g,b); else fl_xpixel(i);}
-    r -= xmap.r;
-    g -= xmap.g;
-    b -= xmap.b;
-    *to = uchar(xmap.pixel);
-  }
-  ri = r; gi = g; bi = b;
-}
-
-static void mono8_converter(const uchar *from, uchar *to, int w, int delta) {
-  int r=ri, g=gi, b=bi;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    to = to+(w-1);
-    d = -delta;
-    td = -1;
-  } else {
-    dir = 1;
-    d = delta;
-    td = 1;
-  }
-  for (; w--; from += d, to += td) {
-    r += from[0]; if (r < 0) r = 0; else if (r>255) r = 255;
-    g += from[0]; if (g < 0) g = 0; else if (g>255) g = 255;
-    b += from[0]; if (b < 0) b = 0; else if (b>255) b = 255;
-    Fl_Color i = fl_color_cube(r*FL_NUM_RED/256,g*FL_NUM_GREEN/256,b*FL_NUM_BLUE/256);
-    Fl_XColor& xmap = fl_xmap[0][i];
-    if (!xmap.mapped) {if (!fl_redmask) fl_xpixel(r,g,b); else fl_xpixel(i);}
-    r -= xmap.r;
-    g -= xmap.g;
-    b -= xmap.b;
-    *to = uchar(xmap.pixel);
-  }
-  ri = r; gi = g; bi = b;
-}
-
-#  endif
-
-////////////////////////////////////////////////////////////////
-// 16 bit TrueColor converters with error diffusion
-// Cray computers have no 16-bit type, so we use character pointers
-// (which may be slow)
-
-#  ifdef U16
-#    define OUTTYPE U16
-#    define OUTSIZE 1
-#    define OUTASSIGN(v) *t = v
-#  else
-#    define OUTTYPE uchar
-#    define OUTSIZE 2
-#    define OUTASSIGN(v) int tt=v; t[0] = uchar(tt>>8); t[1] = uchar(tt)
-#  endif
-
-static void color16_converter(const uchar *from, uchar *to, int w, int delta) {
-  OUTTYPE *t = (OUTTYPE *)to;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    t = t+(w-1)*OUTSIZE;
-    d = -delta;
-    td = -OUTSIZE;
-  } else {
-    dir = 1;
-    d = delta;
-    td = OUTSIZE;
-  }
-  int r=ri, g=gi, b=bi;
-  for (; w--; from += d, t += td) {
-    r = (r&~fl_redmask)  +from[0]; if (r>255) r = 255;
-    g = (g&~fl_greenmask)+from[1]; if (g>255) g = 255;
-    b = (b&~fl_bluemask) +from[2]; if (b>255) b = 255;
-    OUTASSIGN((
-      ((r&fl_redmask)<<fl_redshift)+
-      ((g&fl_greenmask)<<fl_greenshift)+
-      ((b&fl_bluemask)<<fl_blueshift)
-      ) >> fl_extrashift);
-  }
-  ri = r; gi = g; bi = b;
-}
-
-static void mono16_converter(const uchar *from,uchar *to,int w, int delta) {
-  OUTTYPE *t = (OUTTYPE *)to;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    t = t+(w-1)*OUTSIZE;
-    d = -delta;
-    td = -OUTSIZE;
-  } else {
-    dir = 1;
-    d = delta;
-    td = OUTSIZE;
-  }
-  uchar mask = fl_redmask & fl_greenmask & fl_bluemask;
-  int r=ri;
-  for (; w--; from += d, t += td) {
-    r = (r&~mask) + *from; if (r > 255) r = 255;
-    uchar m = r&mask;
-    OUTASSIGN((
-      (m<<fl_redshift)+
-      (m<<fl_greenshift)+
-      (m<<fl_blueshift)
-      ) >> fl_extrashift);
-  }
-  ri = r;
-}
-
-// special-case the 5r6g5b layout used by XFree86:
-
-static void c565_converter(const uchar *from, uchar *to, int w, int delta) {
-  OUTTYPE *t = (OUTTYPE *)to;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    t = t+(w-1)*OUTSIZE;
-    d = -delta;
-    td = -OUTSIZE;
-  } else {
-    dir = 1;
-    d = delta;
-    td = OUTSIZE;
-  }
-  int r=ri, g=gi, b=bi;
-  for (; w--; from += d, t += td) {
-    r = (r&7)+from[0]; if (r>255) r = 255;
-    g = (g&3)+from[1]; if (g>255) g = 255;
-    b = (b&7)+from[2]; if (b>255) b = 255;
-    OUTASSIGN(((r&0xf8)<<8) + ((g&0xfc)<<3) + (b>>3));
-  }
-  ri = r; gi = g; bi = b;
-}
-
-static void m565_converter(const uchar *from,uchar *to,int w, int delta) {
-  OUTTYPE *t = (OUTTYPE *)to;
-  int d, td;
-  if (dir) {
-    dir = 0;
-    from = from+(w-1)*delta;
-    t = t+(w-1)*OUTSIZE;
-    d = -delta;
-    td = -OUTSIZE;
-  } else {
-    dir = 1;
-    d = delta;
-    td = OUTSIZE;
-  }
-  int r=ri;
-  for (; w--; from += d, t += td) {
-    r = (r&7) + *from; if (r > 255) r = 255;
-    OUTASSIGN((r>>3) * 0x841);
-  }
-  ri = r;
-}
-
-////////////////////////////////////////////////////////////////
-// 24bit TrueColor converters:
-
-static void rgb_converter(const uchar *from, uchar *to, int w, int delta) {
-  int d = delta-3;
-  for (; w--; from += d) {
-    *to++ = *from++;
-    *to++ = *from++;
-    *to++ = *from++;
-  }
-}
-
-static void bgr_converter(const uchar *from, uchar *to, int w, int delta) {
-  for (; w--; from += delta) {
-    uchar r = from[0];
-    uchar g = from[1];
-    *to++ = from[2];
-    *to++ = g;
-    *to++ = r;
-  }
-}
-
-static void rrr_converter(const uchar *from, uchar *to, int w, int delta) {
-  for (; w--; from += delta) {
-    *to++ = *from;
-    *to++ = *from;
-    *to++ = *from;
-  }
-}
-
-////////////////////////////////////////////////////////////////
-// 32bit TrueColor converters on a 32 or 64-bit machine:
-
-#  ifdef U64
-#    define STORETYPE U64
-#    if WORDS_BIGENDIAN
-#      define INNARDS32(f) \
-  U64 *t = (U64*)to; \
-  int w1 = w/2; \
-  for (; w1--; from += delta) {U64 i = f; from += delta; *t++ = (i<<32)|(f);} \
-  if (w&1) *t++ = (U64)(f)<<32;
-#    else
-#      define INNARDS32(f) \
-  U64 *t = (U64*)to; \
-  int w1 = w/2; \
-  for (; w1--; from += delta) {U64 i = f; from += delta; *t++ = ((U64)(f)<<32)|i;} \
-  if (w&1) *t++ = (U64)(f);
-#    endif
-#  else
-#    define STORETYPE U32
-#    define INNARDS32(f) \
-  U32 *t = (U32*)to; for (; w--; from += delta) *t++ = f
-#  endif
-
-static void rgbx_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32((unsigned(from[0])<<24)+(from[1]<<16)+(from[2]<<8));
-}
-
-static void xbgr_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32((from[0])+(from[1]<<8)+(from[2]<<16));
-}
-
-static void xrgb_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32((from[0]<<16)+(from[1]<<8)+(from[2]));
-}
-
-static void argb_premul_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32((unsigned(from[3]) << 24) +
-             (((from[0] * from[3]) / 255) << 16) +
-             (((from[1] * from[3]) / 255) << 8) +
-             ((from[2] * from[3]) / 255));
-}
-
-static void bgrx_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32((from[0]<<8)+(from[1]<<16)+(unsigned(from[2])<<24));
-}
-
-static void rrrx_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32(unsigned(*from) * 0x1010100U);
-}
-
-static void xrrr_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32(*from * 0x10101U);
-}
-
-static void
-color32_converter(const uchar *from, uchar *to, int w, int delta) {
-  INNARDS32(
-    (from[0]<<fl_redshift)+(from[1]<<fl_greenshift)+(from[2]<<fl_blueshift));
-}
-
-static void
-mono32_converter(const uchar *from,uchar *to,int w, int delta) {
-  INNARDS32(
-    (*from << fl_redshift)+(*from << fl_greenshift)+(*from << fl_blueshift));
-}
-
-////////////////////////////////////////////////////////////////
-
-static void figure_out_visual() {
-
-  fl_xpixel(FL_BLACK); // setup fl_redmask, etc, in fl_color.cxx
-  fl_xpixel(FL_WHITE); // also make sure white is allocated
-
-  static XPixmapFormatValues *pfvlist;
-  static int FL_NUM_pfv;
-  if (!pfvlist) pfvlist = XListPixmapFormats(fl_display,&FL_NUM_pfv);
-  XPixmapFormatValues *pfv;
-  for (pfv = pfvlist; pfv < pfvlist+FL_NUM_pfv; pfv++)
-    if (pfv->depth == fl_visual->depth) break;
-  xi.format = ZPixmap;
-  xi.byte_order = ImageByteOrder(fl_display);
-//i.bitmap_unit = 8;
-//i.bitmap_bit_order = MSBFirst;
-//i.bitmap_pad = 8;
-  xi.depth = fl_visual->depth;
-  xi.bits_per_pixel = pfv->bits_per_pixel;
-
-  if (xi.bits_per_pixel & 7) bytes_per_pixel = 0; // produce fatal error
-  else bytes_per_pixel = xi.bits_per_pixel/8;
-
-  unsigned int n = pfv->scanline_pad/8;
-  if (pfv->scanline_pad & 7 || (n&(n-1)))
-    Fl::fatal("Can't do scanline_pad of %d",pfv->scanline_pad);
-  if (n < sizeof(STORETYPE)) n = sizeof(STORETYPE);
-  scanline_add = n-1;
-  scanline_mask = -n;
-
-#  if USE_COLORMAP
-  if (bytes_per_pixel == 1) {
-    converter = color8_converter;
-    mono_converter = mono8_converter;
-    return;
-  }
-  if (!fl_visual->red_mask)
-    Fl::fatal("Can't do %d bits_per_pixel colormap",xi.bits_per_pixel);
-#  endif
-
-  // otherwise it is a TrueColor visual:
-
-  int rs = fl_redshift;
-  int gs = fl_greenshift;
-  int bs = fl_blueshift;
-
-  switch (bytes_per_pixel) {
-
-  case 2:
-    // All 16-bit TrueColor visuals are supported on any machine with
-    // 24 or more bits per integer.
-#  ifdef U16
-    xi.byte_order = WORDS_BIGENDIAN;
-#  else
-    xi.byte_order = 1;
-#  endif
-    if (rs == 11 && gs == 6 && bs == 0 && fl_extrashift == 3) {
-      converter = c565_converter;
-      mono_converter = m565_converter;
-    } else {
-      converter = color16_converter;
-      mono_converter = mono16_converter;
-    }
-    break;
-
-  case 3:
-    if (xi.byte_order) {rs = 16-rs; gs = 16-gs; bs = 16-bs;}
-    if (rs == 0 && gs == 8 && bs == 16) {
-      converter = rgb_converter;
-      mono_converter = rrr_converter;
-    } else if (rs == 16 && gs == 8 && bs == 0) {
-      converter = bgr_converter;
-      mono_converter = rrr_converter;
-    } else {
-      Fl::fatal("Can't do arbitrary 24bit color");
-    }
-    break;
-
-  case 4:
-    if ((xi.byte_order!=0) != WORDS_BIGENDIAN)
-      {rs = 24-rs; gs = 24-gs; bs = 24-bs;}
-    if (rs == 0 && gs == 8 && bs == 16) {
-      converter = xbgr_converter;
-      mono_converter = xrrr_converter;
-    } else if (rs == 24 && gs == 16 && bs == 8) {
-      converter = rgbx_converter;
-      mono_converter = rrrx_converter;
-    } else if (rs == 8 && gs == 16 && bs == 24) {
-      converter = bgrx_converter;
-      mono_converter = rrrx_converter;
-    } else if (rs == 16 && gs == 8 && bs == 0) {
-      converter = xrgb_converter;
-      mono_converter = xrrr_converter;
-    } else {
-      xi.byte_order = WORDS_BIGENDIAN;
-      converter = color32_converter;
-      mono_converter = mono32_converter;
-    }
-    break;
-
-  default:
-    Fl::fatal("Can't do %d bits_per_pixel",xi.bits_per_pixel);
-  }
-
-}
-
-#  define MAXBUFFER 0x40000 // 256k
-
-static void innards(const uchar *buf, int X, int Y, int W, int H,
-		    int delta, int linedelta, int mono,
-		    Fl_Draw_Image_Cb cb, void* userdata,
-		    const bool alpha)
-{
-  if (!linedelta) linedelta = W*delta;
-
-  int dx, dy, w, h;
-  fl_clip_box(X,Y,W,H,dx,dy,w,h);
-  if (w<=0 || h<=0) return;
-  dx -= X;
-  dy -= Y;
-
-  if (!bytes_per_pixel) figure_out_visual();
-  const unsigned oldbpp = bytes_per_pixel;
-  const GC oldgc = fl_gc;
-  static GC gc32 = None;
-  xi.width = w;
-  xi.height = h;
-
-  void (*conv)(const uchar *from, uchar *to, int w, int delta) = converter;
-  if (mono) conv = mono_converter;
-  if (alpha) {
-    // This flag states the destination format is ARGB32 (big-endian), pre-multiplied.
-    bytes_per_pixel = 4;
-    conv = argb_premul_converter;
-    xi.depth = 32;
-    xi.bits_per_pixel = 32;
-
-    // Do we need a new GC?
-    if (fl_visual->depth != 32) {
-      if (gc32 == None)
-        gc32 = XCreateGC(fl_display, fl_window, 0, NULL);
-      fl_gc = gc32;
-    }
-  }
-
-  // See if the data is already in the right format.  Unfortunately
-  // some 32-bit x servers (XFree86) care about the unknown 8 bits
-  // and they must be zero.  I can't confirm this for user-supplied
-  // data, so the 32-bit shortcut is disabled...
-  // This can set bytes_per_line negative if image is bottom-to-top
-  // I tested it on Linux, but it may fail on other Xlib implementations:
-  if (buf && (
-#  if 0	// set this to 1 to allow 32-bit shortcut
-      delta == 4 &&
-#    if WORDS_BIGENDIAN
-      conv == rgbx_converter
-#    else
-      conv == xbgr_converter
-#    endif
-      ||
-#  endif
-      conv == rgb_converter && delta==3
-      ) && !(linedelta&scanline_add)) {
-    xi.data = (char *)(buf+delta*dx+linedelta*dy);
-    xi.bytes_per_line = linedelta;
-
-  } else {
-    int linesize = ((w*bytes_per_pixel+scanline_add)&scanline_mask)/sizeof(STORETYPE);
-    int blocking = h;
-    static STORETYPE *buffer;	// our storage, always word aligned
-    static long buffer_size;
-    {int size = linesize*h;
-    if (size > MAXBUFFER) {
-      size = MAXBUFFER;
-      blocking = MAXBUFFER/linesize;
-    }
-    if (size > buffer_size) {
-      delete[] buffer;
-      buffer_size = size;
-      buffer = new STORETYPE[size];
-    }}
-    xi.data = (char *)buffer;
-    xi.bytes_per_line = linesize*sizeof(STORETYPE);
-    if (buf) {
-      buf += delta*dx+linedelta*dy;
-      for (int j=0; j<h; ) {
-	STORETYPE *to = buffer;
-	int k;
-	for (k = 0; j<h && k<blocking; k++, j++) {
-	  conv(buf, (uchar*)to, w, delta);
-	  buf += linedelta;
-	  to += linesize;
-	}
-	XPutImage(fl_display,fl_window,fl_gc, &xi, 0, 0, X+dx, Y+dy+j-k, w, k);
-      }
-    } else {
-      STORETYPE* linebuf = new STORETYPE[(W*delta+(sizeof(STORETYPE)-1))/sizeof(STORETYPE)];
-      for (int j=0; j<h; ) {
-	STORETYPE *to = buffer;
-	int k;
-	for (k = 0; j<h && k<blocking; k++, j++) {
-	  cb(userdata, dx, dy+j, w, (uchar*)linebuf);
-	  conv((uchar*)linebuf, (uchar*)to, w, delta);
-	  to += linesize;
-	}
-	XPutImage(fl_display,fl_window,fl_gc, &xi, 0, 0, X+dx, Y+dy+j-k, w, k);
-      }
-
-      delete[] linebuf;
-    }
-  }
-
-  if (alpha) {
-    bytes_per_pixel = oldbpp;
-    xi.depth = fl_visual->depth;
-    xi.bits_per_pixel = oldbpp * 8;
-
-    if (fl_visual->depth != 32) {
-      fl_gc = oldgc;
-    }
-  }
-}
-
-void Fl_Xlib_Graphics_Driver::draw_image(const uchar* buf, int x, int y, int w, int h, int d, int l){
-
-  const bool alpha = !!(d & FL_IMAGE_WITH_ALPHA);
-  d &= ~FL_IMAGE_WITH_ALPHA;
-
-  innards(buf,x,y,w,h,d,l,(d<3&&d>-3),0,0,alpha);
-}
-void Fl_Xlib_Graphics_Driver::draw_image(Fl_Draw_Image_Cb cb, void* data,
-		   int x, int y, int w, int h,int d) {
-
-  const bool alpha = !!(d & FL_IMAGE_WITH_ALPHA);
-  d &= ~FL_IMAGE_WITH_ALPHA;
-
-  innards(0,x,y,w,h,d,0,(d<3&&d>-3),cb,data,alpha);
-}
-void Fl_Xlib_Graphics_Driver::draw_image_mono(const uchar* buf, int x, int y, int w, int h, int d, int l){
-  innards(buf,x,y,w,h,d,l,1,0,0,0);
-}
-void Fl_Xlib_Graphics_Driver::draw_image_mono(Fl_Draw_Image_Cb cb, void* data,
-		   int x, int y, int w, int h,int d) {
-  innards(0,x,y,w,h,d,0,1,cb,data,0);
-}
-
-void fl_rectf(int x, int y, int w, int h, uchar r, uchar g, uchar b) {
-  if (fl_visual->depth > 16) {
-    fl_color(r,g,b);
-    fl_rectf(x,y,w,h);
-  } else {
-    uchar c[3];
-    c[0] = r; c[1] = g; c[2] = b;
-    innards(c,x,y,w,h,0,0,0,0,0,0);
-  }
-}
-
+#  include "drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx"
 #endif
 
 //