From b50c7fe536960a49349475f5c361044b097f24dc Mon Sep 17 00:00:00 2001
From: Graeme Geldenhuys <graeme@mastermaths.co.za>
Date: Mon, 27 Feb 2012 19:53:35 +0200
Subject: initial import of AggPas 2.4 RM3

The AggPas demos will not compile at this time, because I have restructured
the directories a bit. I wanted a pristine checkin though. The demos will be
fixed in the next few commits.
---
 src/corelib/render/software/pf_gray8.inc | 437 +++++++++++++++++++++++++++++++
 1 file changed, 437 insertions(+)
 create mode 100644 src/corelib/render/software/pf_gray8.inc

(limited to 'src/corelib/render/software/pf_gray8.inc')

diff --git a/src/corelib/render/software/pf_gray8.inc b/src/corelib/render/software/pf_gray8.inc
new file mode 100644
index 00000000..47454637
--- /dev/null
+++ b/src/corelib/render/software/pf_gray8.inc
@@ -0,0 +1,437 @@
+//
+// AggPas 2.4 RM3 pixel format definition file
+//
+{ blend_pix_gray }
+procedure blend_pix_gray(p : int8u_ptr; cv ,alpha : unsigned; cover : unsigned = 0 );
+begin
+ p^:=int8u((((cv - p^ ) * alpha ) + (p^ shl base_shift ) ) shr base_shift );
+
+end;
+
+{ copy_or_blend_pix_gray }
+procedure copy_or_blend_pix_gray(p : int8u_ptr; c : aggclr_ptr; cover : unsigned ); overload;
+var
+ alpha : unsigned;
+
+begin
+ if  c.a <> 0 then
+  begin
+   alpha:=(c.a * (cover + 1 ) ) shr 8;
+
+   if alpha = base_mask then
+    p^:=c.v
+   else
+    blend_pix_gray(p ,c.v ,alpha ,cover );
+
+  end;
+
+end;
+
+{ copy_or_blend_pix_gray }
+procedure copy_or_blend_pix_gray(p : int8u_ptr; c : aggclr_ptr ); overload;
+begin
+ if c.a <> 0 then
+  if c.a = base_mask then
+   p^:=c.v
+  else
+   blend_pix_gray(p ,c.v ,c.a );
+
+end;
+
+{ gray8_copy_pixel }
+procedure gray8_copy_pixel(this : pixel_formats_ptr; x ,y : int; c : aggclr_ptr );
+begin
+ int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset )^:=c.v;
+
+end;
+
+{ gray8_blend_pixel }
+procedure gray8_blend_pixel(this : pixel_formats_ptr; x ,y : int; c : aggclr_ptr; cover : int8u );
+begin
+ copy_or_blend_pix_gray(
+  int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset ) ,
+  c ,cover );
+
+end;
+
+{ gray8_pixel }
+function gray8_pixel(this : pixel_formats_ptr; x ,y : int ) : aggclr;
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ result.ConstrInt(p^ );
+
+end;
+
+{ gray8_copy_hline }
+procedure gray8_copy_hline(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ repeat
+  p^:=c.v;
+
+  inc(ptrcomp(p ) ,this.m_step );
+  dec(len );
+
+ until len = 0;
+
+end;
+
+{ gray8_copy_vline }
+procedure gray8_copy_vline(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ repeat
+  p^:=c.v;
+  p :=this.m_rbuf.next_row(p );
+
+  dec(len );
+
+ until len = 0;
+
+end;
+
+{ gray8_blend_hline }
+procedure gray8_blend_hline(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr; cover : int8u );
+var
+ p : int8u_ptr;
+
+ alpha : unsigned;
+
+begin
+ if c.a <> 0 then
+  begin
+   p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+   alpha:=(c.a * (cover + 1 ) ) shr 8;
+
+   if alpha = base_mask then
+    repeat
+     p^:=c.v;
+
+     inc(ptrcomp(p ) ,this.m_step );
+     dec(len );
+
+    until len = 0
+   else
+    repeat
+     blend_pix_gray(p ,c.v ,alpha ,cover );
+
+     inc(ptrcomp(p ) ,this.m_step );
+     dec(len );
+
+    until len = 0;
+
+  end;
+
+end;
+
+{ gray8_blend_vline }
+procedure gray8_blend_vline(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr; cover : int8u );
+var
+ p : int8u_ptr;
+
+ alpha : unsigned;
+
+begin
+ if c.a <> 0 then
+  begin
+   p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+   alpha:=(c.a * (cover + 1 ) ) shr 8;
+
+   if alpha = base_mask then
+    repeat
+     p^:=c.v;
+     p :=this.m_rbuf.next_row(p );
+
+     dec(len );
+
+    until len = 0
+   else
+    repeat
+     blend_pix_gray(p ,c.v ,alpha ,cover );
+
+     p:=this.m_rbuf.next_row(p );
+
+     dec(len );
+
+    until len = 0;
+
+  end;
+
+end;
+
+{ gray8_blend_solid_hspan }
+procedure gray8_blend_solid_hspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr; covers : int8u_ptr );
+var
+ p : int8u_ptr;
+
+ alpha : unsigned;
+
+begin
+ if c.a <> 0 then
+  begin
+   p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+   repeat
+    alpha:=(c.a * (covers^ + 1 ) ) shr 8;
+
+    if alpha = base_mask then
+     p^:=c.v
+    else
+     blend_pix_gray(p ,c.v ,alpha ,covers^ );
+
+    inc(ptrcomp(p ) ,this.m_step );
+    inc(ptrcomp(covers ) );
+    dec(len );
+
+   until len = 0;
+
+  end;
+
+end;
+
+{ gray8_blend_solid_vspan }
+procedure gray8_blend_solid_vspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; c : aggclr_ptr; covers : int8u_ptr );
+var
+ p : int8u_ptr;
+
+ alpha : unsigned;
+
+begin
+ if c.a <> 0 then
+  begin
+   p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+   repeat
+    alpha:=(c.a * (covers^ + 1 ) ) shr 8;
+
+    if alpha = base_mask then
+     p^:=c.v
+    else
+     blend_pix_gray(p ,c.v ,alpha ,covers^ );
+
+    p:=this.m_rbuf.next_row(p );
+
+    inc(ptrcomp(covers ) ,sizeof(int8u ) );
+    dec(len );
+
+   until len = 0;
+
+  end;
+
+end;
+
+{ gray8_blend_color_hspan }
+procedure gray8_blend_color_hspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; colors : aggclr_ptr; covers : int8u_ptr; cover : int8u );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ if covers <> NIL then
+  repeat
+   copy_or_blend_pix_gray(p ,colors ,covers^ );
+
+   inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+   inc(ptrcomp(covers ) ,sizeof(int8u ) );
+   inc(ptrcomp(p ) ,this.m_step );
+   dec(len );
+
+  until len = 0
+ else
+  if cover = 255 then
+   repeat
+    if colors.a = base_mask then
+     p^:=colors.v
+    else
+     copy_or_blend_pix_gray(p ,colors );
+
+    inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+    inc(ptrcomp(p ) ,this.m_step );
+    dec(len );
+
+   until len = 0
+  else
+   repeat
+    copy_or_blend_pix_gray(p ,colors ,cover );
+
+    inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+    inc(ptrcomp(p ) ,this.m_step );
+    dec(len );
+
+   until len = 0;
+
+end;
+
+{ gray8_blend_color_vspan }
+procedure gray8_blend_color_vspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; colors : aggclr_ptr; covers : int8u_ptr; cover : int8u );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ if covers <> NIL then
+  repeat
+   copy_or_blend_pix_gray(p ,colors ,covers^ );
+
+   inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+   inc(ptrcomp(covers ) ,sizeof(int8u ) );
+
+   p:=this.m_rbuf.next_row(p );
+
+   dec(len );
+
+  until len = 0
+ else
+  if cover = 255 then
+   repeat
+    if colors.a = base_mask then
+     p^:=colors.v
+    else
+     copy_or_blend_pix_gray(p ,colors );
+
+    p:=this.m_rbuf.next_row(p );
+
+    inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+    dec(len );
+
+   until len = 0
+
+  else
+   repeat
+    copy_or_blend_pix_gray(p ,colors ,cover );
+
+    inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+
+    p:=this.m_rbuf.next_row(p );
+
+    dec(len );
+
+   until len = 0;
+
+end;
+
+{ gray8_copy_from }
+procedure gray8_copy_from(this : pixel_formats_ptr; from : rendering_buffer_ptr; xdst ,ydst ,xsrc ,ysrc : int; len : unsigned );
+begin
+ move(
+  int8u_ptr(ptrcomp(from.row(ysrc ) ) + xsrc * sizeof(int8u ) )^ ,
+  int8u_ptr(ptrcomp(this.m_rbuf.row(ydst ) ) + xdst * sizeof(int8u ) )^ ,
+  len * sizeof(int8u ) );
+
+end;
+
+{ gray8_copy_color_hspan }
+procedure gray8_copy_color_hspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; colors : aggclr_ptr );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ repeat
+  p^:=colors.v;
+
+  inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+  inc(ptrcomp(p ) ,this.m_step );
+  dec(len );
+
+ until len = 0;
+
+end;
+
+{ gray8_copy_color_vspan }
+procedure gray8_copy_color_vspan(this : pixel_formats_ptr; x ,y : int; len : unsigned; colors : aggclr_ptr );
+var
+ p : int8u_ptr;
+
+begin
+ p:=int8u_ptr(ptrcomp(this.m_rbuf.row(y ) ) + x * this.m_step + this.m_offset );
+
+ repeat
+  p^:=colors.v;
+
+  inc(ptrcomp(colors ) ,sizeof(aggclr ) );
+
+  p:=this.m_rbuf.next_row(p );
+
+  dec(len );
+
+ until len = 0;
+
+end;
+
+{ gray8_blend_from_color }
+procedure gray8_blend_from_color(this : pixel_formats_ptr; from : pixel_formats_ptr; color : aggclr_ptr; xdst ,ydst ,xsrc ,ysrc : int; len : unsigned; cover : int8u );
+var
+ ppsz : unsigned;
+
+ psrc ,pdst : int8u_ptr;
+
+begin
+ ppsz:=from._pix_width;
+ psrc:=from.row_ptr(ysrc );
+
+ if psrc <> NIL then
+  begin
+   pdst:=int8u_ptr(ptrcomp(this.m_rbuf.row_xy(xdst ,ydst ,len ) ) + xdst * this.m_step + this.m_offset );
+
+   repeat
+    copy_or_blend_pix_gray(
+     pdst ,color ,
+     shr_int32(psrc^ * cover + base_mask ,base_shift ) );
+
+    inc(ptrcomp(psrc ) ,ppsz );
+    inc(ptrcomp(pdst ) ,this.m_step );
+    dec(len );
+
+   until len = 0;
+
+  end;
+
+end;
+
+{ gray8_blend_from_lut }
+procedure gray8_blend_from_lut(this : pixel_formats_ptr; from : pixel_formats_ptr; color_lut : aggclr_ptr; xdst ,ydst ,xsrc ,ysrc : int; len : unsigned; cover : int8u );
+var
+ ppsz : unsigned;
+
+ psrc ,pdst : int8u_ptr;
+
+begin
+ ppsz:=from._pix_width;
+ psrc:=from.row_ptr(ysrc );
+
+ if psrc <> NIL then
+  begin
+   pdst:=int8u_ptr(ptrcomp(this.m_rbuf.row_xy(xdst ,ydst ,len ) ) + xdst * this.m_step + this.m_offset );
+
+   repeat
+    copy_or_blend_pix_gray(
+     pdst ,aggclr_ptr(ptrcomp(color_lut ) + psrc^ * sizeof(aggclr ) ) ,cover );
+
+    inc(ptrcomp(psrc ) ,ppsz );
+    inc(ptrcomp(pdst ) ,this.m_step );
+    dec(len );
+
+   until len = 0;
+
+  end;
+
+end;
+
-- 
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