39241fe228
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9933 a95241bf-73f2-0310-859d-f6bbb57e9c96
372 lines
14 KiB
C++
372 lines
14 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.2
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// Copyright (C) 2002-2004 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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#ifndef AGG_PIXFMT_RGBA32_INCLUDED
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#define AGG_PIXFMT_RGBA32_INCLUDED
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#include <string.h>
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#include "agg_basics.h"
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#include "agg_color_rgba8.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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//====================================================pixel_formats_rgba32
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template<class Order> class pixel_formats_rgba32
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{
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public:
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typedef rgba8 color_type;
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//--------------------------------------------------------------------
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pixel_formats_rgba32(rendering_buffer& rb)
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: m_rbuf(&rb)
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{
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}
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//--------------------------------------------------------------------
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unsigned width() const { return m_rbuf->width(); }
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unsigned height() const { return m_rbuf->height(); }
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//--------------------------------------------------------------------
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color_type pixel(int x, int y)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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return color_type(p[Order::R], p[Order::G], p[Order::B], p[Order::A]);
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}
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//--------------------------------------------------------------------
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void copy_pixel(int x, int y, const color_type& c)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p[Order::A] = (int8u)c.a;
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}
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//--------------------------------------------------------------------
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void blend_pixel(int x, int y, const color_type& c, int8u cover)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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int alpha = int(cover) * int(c.a);
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if(alpha == 255*255)
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p[Order::A] = (int8u)c.a;
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}
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else
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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}
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}
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//--------------------------------------------------------------------
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void copy_hline(int x, int y, unsigned len, const color_type& c)
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{
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int32u v;
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int8u* p8 = (int8u*)&v;
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p8[Order::R] = (int8u)c.r;
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p8[Order::G] = (int8u)c.g;
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p8[Order::B] = (int8u)c.b;
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p8[Order::A] = (int8u)c.a;
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int32u* p32 = (int32u*)(m_rbuf->row(y)) + x;
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do
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{
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*p32++ = v;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void copy_vline(int x, int y, unsigned len, const color_type& c)
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{
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int32u v;
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int8u* p8 = (int8u*)&v;
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p8[Order::R] = (int8u)c.r;
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p8[Order::G] = (int8u)c.g;
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p8[Order::B] = (int8u)c.b;
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p8[Order::A] = (int8u)c.a;
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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*(int32u*)p = v;
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p += m_rbuf->stride();
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_hline(int x, int y, unsigned len,
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const color_type& c, int8u cover)
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{
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int alpha = int(cover) * int(c.a);
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if(alpha == 255*255)
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{
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int32u v;
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int8u* p8 = (int8u*)&v;
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p8[Order::R] = (int8u)c.r;
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p8[Order::G] = (int8u)c.g;
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p8[Order::B] = (int8u)c.b;
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p8[Order::A] = (int8u)c.a;
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int32u* p32 = (int32u*)(m_rbuf->row(y)) + x;
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do
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{
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*p32++ = v;
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}
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while(--len);
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}
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else
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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p += 4;
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void blend_vline(int x, int y, unsigned len,
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const color_type& c, int8u cover)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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int alpha = int(cover) * c.a;
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if(alpha == 255*255)
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{
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int32u v;
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int8u* p8 = (int8u*)&v;
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p8[Order::R] = (int8u)c.r;
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p8[Order::G] = (int8u)c.g;
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p8[Order::B] = (int8u)c.b;
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p8[Order::A] = (int8u)c.a;
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do
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{
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*(int32u*)p = v;
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p += m_rbuf->stride();
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}
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while(--len);
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}
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else
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{
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do
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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p += m_rbuf->stride();
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void copy_from(const rendering_buffer& from,
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int xdst, int ydst,
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int xsrc, int ysrc,
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unsigned len)
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{
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memmove(m_rbuf->row(ydst) + xdst * 4,
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(const void*)(from.row(ysrc) + xsrc * 4), len * 4);
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}
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//--------------------------------------------------------------------
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void blend_solid_hspan(int x, int y, unsigned len,
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const color_type& c, const int8u* covers)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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int alpha = int(*covers++) * c.a;
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if(alpha)
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{
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if(alpha == 255*255)
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p[Order::A] = (int8u)c.a;
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}
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else
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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}
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}
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p += 4;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_solid_vspan(int x, int y, unsigned len,
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const color_type& c, const int8u* covers)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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int alpha = int(*covers++) * c.a;
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if(alpha)
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{
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if(alpha == 255*255)
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p[Order::A] = (int8u)c.a;
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}
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else
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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}
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}
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p += m_rbuf->stride();
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_color_hspan(int x, int y, unsigned len,
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const color_type* colors,
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const int8u* covers,
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int8u cover)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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int alpha = colors->a * (covers ? int(*covers++) : int(cover));
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if(alpha)
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{
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if(alpha == 255*255)
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{
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p[Order::R] = (int8u)colors->r;
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p[Order::G] = (int8u)colors->g;
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p[Order::B] = (int8u)colors->b;
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p[Order::A] = (int8u)colors->a;
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}
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else
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((colors->r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((colors->g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((colors->b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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}
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}
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p += 4;
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++colors;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_color_vspan(int x, int y, unsigned len,
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const color_type* colors,
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const int8u* covers,
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int8u cover)
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{
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int8u* p = m_rbuf->row(y) + (x << 2);
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do
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{
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int alpha = colors->a * (covers ? int(*covers++) : int(cover));
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if(alpha)
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{
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if(alpha == 255*255)
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{
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p[Order::R] = (int8u)colors->r;
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p[Order::G] = (int8u)colors->g;
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p[Order::B] = (int8u)colors->b;
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p[Order::A] = (int8u)colors->a;
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}
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else
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{
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int r = p[Order::R];
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int g = p[Order::G];
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int b = p[Order::B];
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int a = p[Order::A];
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p[Order::R] = (int8u)((((colors->r - r) * alpha) + (r << 16)) >> 16);
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p[Order::G] = (int8u)((((colors->g - g) * alpha) + (g << 16)) >> 16);
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p[Order::B] = (int8u)((((colors->b - b) * alpha) + (b << 16)) >> 16);
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p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
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}
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}
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p += m_rbuf->stride();
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++colors;
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}
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while(--len);
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}
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private:
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rendering_buffer* m_rbuf;
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};
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typedef pixel_formats_rgba32<order_rgba32> pixfmt_rgba32; //----pixfmt_rgba32
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typedef pixel_formats_rgba32<order_argb32> pixfmt_argb32; //----pixfmt_argb32
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typedef pixel_formats_rgba32<order_abgr32> pixfmt_abgr32; //----pixfmt_abgr32
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typedef pixel_formats_rgba32<order_bgra32> pixfmt_bgra32; //----pixfmt_bgra32
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}
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#endif
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