//---------------------------------------------------------------------------- // Anti-Grain Geometry (AGG) - Version 2.5 // A high quality rendering engine for C++ // Copyright (C) 2002-2006 Maxim Shemanarev // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://antigrain.com // // AGG is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // AGG is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with AGG; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, // MA 02110-1301, USA. //---------------------------------------------------------------------------- #ifndef AGG_RENDERER_BASE_INCLUDED #define AGG_RENDERER_BASE_INCLUDED #include "agg_basics.h" #include "agg_rendering_buffer.h" namespace agg { //-----------------------------------------------------------renderer_base template<class PixelFormat> class renderer_base { public: typedef PixelFormat pixfmt_type; typedef typename pixfmt_type::color_type color_type; typedef typename pixfmt_type::row_data row_data; //-------------------------------------------------------------------- renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {} explicit renderer_base(pixfmt_type& ren) : m_ren(&ren), m_clip_box(0, 0, ren.width() - 1, ren.height() - 1) {} void attach(pixfmt_type& ren) { m_ren = &ren; m_clip_box = rect_i(0, 0, ren.width() - 1, ren.height() - 1); } //-------------------------------------------------------------------- const pixfmt_type& ren() const { return *m_ren; } pixfmt_type& ren() { return *m_ren; } //-------------------------------------------------------------------- unsigned width() const { return m_ren->width(); } unsigned height() const { return m_ren->height(); } //-------------------------------------------------------------------- bool clip_box(int x1, int y1, int x2, int y2) { rect_i cb(x1, y1, x2, y2); cb.normalize(); if(cb.clip(rect_i(0, 0, width() - 1, height() - 1))) { m_clip_box = cb; return true; } m_clip_box.x1 = 1; m_clip_box.y1 = 1; m_clip_box.x2 = 0; m_clip_box.y2 = 0; return false; } //-------------------------------------------------------------------- void reset_clipping(bool visibility) { if(visibility) { m_clip_box.x1 = 0; m_clip_box.y1 = 0; m_clip_box.x2 = width() - 1; m_clip_box.y2 = height() - 1; } else { m_clip_box.x1 = 1; m_clip_box.y1 = 1; m_clip_box.x2 = 0; m_clip_box.y2 = 0; } } //-------------------------------------------------------------------- void clip_box_naked(int x1, int y1, int x2, int y2) { m_clip_box.x1 = x1; m_clip_box.y1 = y1; m_clip_box.x2 = x2; m_clip_box.y2 = y2; } //-------------------------------------------------------------------- bool inbox(int x, int y) const { return x >= m_clip_box.x1 && y >= m_clip_box.y1 && x <= m_clip_box.x2 && y <= m_clip_box.y2; } //-------------------------------------------------------------------- const rect_i& clip_box() const { return m_clip_box; } int xmin() const { return m_clip_box.x1; } int ymin() const { return m_clip_box.y1; } int xmax() const { return m_clip_box.x2; } int ymax() const { return m_clip_box.y2; } //-------------------------------------------------------------------- const rect_i& bounding_clip_box() const { return m_clip_box; } int bounding_xmin() const { return m_clip_box.x1; } int bounding_ymin() const { return m_clip_box.y1; } int bounding_xmax() const { return m_clip_box.x2; } int bounding_ymax() const { return m_clip_box.y2; } //-------------------------------------------------------------------- void clear(const color_type& c) { unsigned y; if(width()) { for(y = 0; y < height(); y++) { m_ren->copy_hline(0, y, width(), c); } } } //-------------------------------------------------------------------- void copy_pixel(int x, int y, const color_type& c) { if(inbox(x, y)) { m_ren->copy_pixel(x, y, c); } } //-------------------------------------------------------------------- void blend_pixel(int x, int y, const color_type& c, cover_type cover) { if(inbox(x, y)) { m_ren->blend_pixel(x, y, c, cover); } } //-------------------------------------------------------------------- color_type pixel(int x, int y) const { return inbox(x, y) ? m_ren->pixel(x, y) : color_type::no_color(); } //-------------------------------------------------------------------- void copy_hline(int x1, int y, int x2, const color_type& c) { if(x1 > x2) { int t = x2; x2 = x1; x1 = t; } if(y > ymax()) return; if(y < ymin()) return; if(x1 > xmax()) return; if(x2 < xmin()) return; if(x1 < xmin()) x1 = xmin(); if(x2 > xmax()) x2 = xmax(); m_ren->copy_hline(x1, y, x2 - x1 + 1, c); } //-------------------------------------------------------------------- void copy_vline(int x, int y1, int y2, const color_type& c) { if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } if(x > xmax()) return; if(x < xmin()) return; if(y1 > ymax()) return; if(y2 < ymin()) return; if(y1 < ymin()) y1 = ymin(); if(y2 > ymax()) y2 = ymax(); m_ren->copy_vline(x, y1, y2 - y1 + 1, c); } //-------------------------------------------------------------------- void blend_hline(int x1, int y, int x2, const color_type& c, cover_type cover) { if(x1 > x2) { int t = x2; x2 = x1; x1 = t; } if(y > ymax()) return; if(y < ymin()) return; if(x1 > xmax()) return; if(x2 < xmin()) return; if(x1 < xmin()) x1 = xmin(); if(x2 > xmax()) x2 = xmax(); m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover); } //-------------------------------------------------------------------- void blend_vline(int x, int y1, int y2, const color_type& c, cover_type cover) { if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } if(x > xmax()) return; if(x < xmin()) return; if(y1 > ymax()) return; if(y2 < ymin()) return; if(y1 < ymin()) y1 = ymin(); if(y2 > ymax()) y2 = ymax(); m_ren->blend_vline(x, y1, y2 - y1 + 1, c, cover); } //-------------------------------------------------------------------- void copy_bar(int x1, int y1, int x2, int y2, const color_type& c) { rect_i rc(x1, y1, x2, y2); rc.normalize(); if(rc.clip(clip_box())) { int y; for(y = rc.y1; y <= rc.y2; y++) { m_ren->copy_hline(rc.x1, y, unsigned(rc.x2 - rc.x1 + 1), c); } } } //-------------------------------------------------------------------- void blend_bar(int x1, int y1, int x2, int y2, const color_type& c, cover_type cover) { rect_i rc(x1, y1, x2, y2); rc.normalize(); if(rc.clip(clip_box())) { int y; for(y = rc.y1; y <= rc.y2; y++) { m_ren->blend_hline(rc.x1, y, unsigned(rc.x2 - rc.x1 + 1), c, cover); } } } //-------------------------------------------------------------------- void blend_solid_hspan(int x, int y, int len, const color_type& c, const cover_type* covers) { if(y > ymax()) return; if(y < ymin()) return; if(x < xmin()) { len -= xmin() - x; if(len <= 0) return; covers += xmin() - x; x = xmin(); } if(x + len > xmax()) { len = xmax() - x + 1; if(len <= 0) return; } m_ren->blend_solid_hspan(x, y, len, c, covers); } //-------------------------------------------------------------------- void blend_solid_vspan(int x, int y, int len, const color_type& c, const cover_type* covers) { if(x > xmax()) return; if(x < xmin()) return; if(y < ymin()) { len -= ymin() - y; if(len <= 0) return; covers += ymin() - y; y = ymin(); } if(y + len > ymax()) { len = ymax() - y + 1; if(len <= 0) return; } m_ren->blend_solid_vspan(x, y, len, c, covers); } //-------------------------------------------------------------------- void copy_color_hspan(int x, int y, int len, const color_type* colors) { if(y > ymax()) return; if(y < ymin()) return; if(x < xmin()) { int d = xmin() - x; len -= d; if(len <= 0) return; colors += d; x = xmin(); } if(x + len > xmax()) { len = xmax() - x + 1; if(len <= 0) return; } m_ren->copy_color_hspan(x, y, len, colors); } //-------------------------------------------------------------------- void copy_color_vspan(int x, int y, int len, const color_type* colors) { if(x > xmax()) return; if(x < xmin()) return; if(y < ymin()) { int d = ymin() - y; len -= d; if(len <= 0) return; colors += d; y = ymin(); } if(y + len > ymax()) { len = ymax() - y + 1; if(len <= 0) return; } m_ren->copy_color_vspan(x, y, len, colors); } //-------------------------------------------------------------------- void blend_color_hspan(int x, int y, int len, const color_type* colors, const cover_type* covers, cover_type cover = agg::cover_full) { if(y > ymax()) return; if(y < ymin()) return; if(x < xmin()) { int d = xmin() - x; len -= d; if(len <= 0) return; if(covers) covers += d; colors += d; x = xmin(); } if(x + len > xmax()) { len = xmax() - x + 1; if(len <= 0) return; } m_ren->blend_color_hspan(x, y, len, colors, covers, cover); } //-------------------------------------------------------------------- void blend_color_vspan(int x, int y, int len, const color_type* colors, const cover_type* covers, cover_type cover = agg::cover_full) { if(x > xmax()) return; if(x < xmin()) return; if(y < ymin()) { int d = ymin() - y; len -= d; if(len <= 0) return; if(covers) covers += d; colors += d; y = ymin(); } if(y + len > ymax()) { len = ymax() - y + 1; if(len <= 0) return; } m_ren->blend_color_vspan(x, y, len, colors, covers, cover); } //-------------------------------------------------------------------- rect_i clip_rect_area(rect_i& dst, rect_i& src, int wsrc, int hsrc) const { rect_i rc(0,0,0,0); rect_i cb = clip_box(); ++cb.x2; ++cb.y2; if(src.x1 < 0) { dst.x1 -= src.x1; src.x1 = 0; } if(src.y1 < 0) { dst.y1 -= src.y1; src.y1 = 0; } if(src.x2 > wsrc) src.x2 = wsrc; if(src.y2 > hsrc) src.y2 = hsrc; if(dst.x1 < cb.x1) { src.x1 += cb.x1 - dst.x1; dst.x1 = cb.x1; } if(dst.y1 < cb.y1) { src.y1 += cb.y1 - dst.y1; dst.y1 = cb.y1; } if(dst.x2 > cb.x2) dst.x2 = cb.x2; if(dst.y2 > cb.y2) dst.y2 = cb.y2; rc.x2 = dst.x2 - dst.x1; rc.y2 = dst.y2 - dst.y1; if(rc.x2 > src.x2 - src.x1) rc.x2 = src.x2 - src.x1; if(rc.y2 > src.y2 - src.y1) rc.y2 = src.y2 - src.y1; return rc; } //-------------------------------------------------------------------- template<class RenBuf> void copy_from(const RenBuf& src, const rect_i* rect_src_ptr = 0, int dx = 0, int dy = 0) { rect_i rsrc(0, 0, src.width(), src.height()); if(rect_src_ptr) { rsrc.x1 = rect_src_ptr->x1; rsrc.y1 = rect_src_ptr->y1; rsrc.x2 = rect_src_ptr->x2 + 1; rsrc.y2 = rect_src_ptr->y2 + 1; } // Version with xdst, ydst (absolute positioning) //rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); // Version with dx, dy (relative positioning) rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); if(rc.x2 > 0) { int incy = 1; if(rdst.y1 > rsrc.y1) { rsrc.y1 += rc.y2 - 1; rdst.y1 += rc.y2 - 1; incy = -1; } while(rc.y2 > 0) { m_ren->copy_from(src, rdst.x1, rdst.y1, rsrc.x1, rsrc.y1, rc.x2); rdst.y1 += incy; rsrc.y1 += incy; --rc.y2; } } } //-------------------------------------------------------------------- template<class SrcPixelFormatRenderer> void blend_from(const SrcPixelFormatRenderer& src, const rect_i* rect_src_ptr = 0, int dx = 0, int dy = 0, cover_type cover = agg::cover_full) { rect_i rsrc(0, 0, src.width(), src.height()); if(rect_src_ptr) { rsrc.x1 = rect_src_ptr->x1; rsrc.y1 = rect_src_ptr->y1; rsrc.x2 = rect_src_ptr->x2 + 1; rsrc.y2 = rect_src_ptr->y2 + 1; } // Version with xdst, ydst (absolute positioning) //rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); // Version with dx, dy (relative positioning) rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); if(rc.x2 > 0) { int incy = 1; if(rdst.y1 > rsrc.y1) { rsrc.y1 += rc.y2 - 1; rdst.y1 += rc.y2 - 1; incy = -1; } while(rc.y2 > 0) { typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); if(rw.ptr) { int x1src = rsrc.x1; int x1dst = rdst.x1; int len = rc.x2; if(rw.x1 > x1src) { x1dst += rw.x1 - x1src; len -= rw.x1 - x1src; x1src = rw.x1; } if(len > 0) { if(x1src + len-1 > rw.x2) { len -= x1src + len - rw.x2 - 1; } if(len > 0) { m_ren->blend_from(src, x1dst, rdst.y1, x1src, rsrc.y1, len, cover); } } } rdst.y1 += incy; rsrc.y1 += incy; --rc.y2; } } } //-------------------------------------------------------------------- template<class SrcPixelFormatRenderer> void blend_from_color(const SrcPixelFormatRenderer& src, const color_type& color, const rect_i* rect_src_ptr = 0, int dx = 0, int dy = 0, cover_type cover = agg::cover_full) { rect_i rsrc(0, 0, src.width(), src.height()); if(rect_src_ptr) { rsrc.x1 = rect_src_ptr->x1; rsrc.y1 = rect_src_ptr->y1; rsrc.x2 = rect_src_ptr->x2 + 1; rsrc.y2 = rect_src_ptr->y2 + 1; } // Version with xdst, ydst (absolute positioning) //rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); // Version with dx, dy (relative positioning) rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); if(rc.x2 > 0) { int incy = 1; if(rdst.y1 > rsrc.y1) { rsrc.y1 += rc.y2 - 1; rdst.y1 += rc.y2 - 1; incy = -1; } while(rc.y2 > 0) { typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); if(rw.ptr) { int x1src = rsrc.x1; int x1dst = rdst.x1; int len = rc.x2; if(rw.x1 > x1src) { x1dst += rw.x1 - x1src; len -= rw.x1 - x1src; x1src = rw.x1; } if(len > 0) { if(x1src + len-1 > rw.x2) { len -= x1src + len - rw.x2 - 1; } if(len > 0) { m_ren->blend_from_color(src, color, x1dst, rdst.y1, x1src, rsrc.y1, len, cover); } } } rdst.y1 += incy; rsrc.y1 += incy; --rc.y2; } } } //-------------------------------------------------------------------- template<class SrcPixelFormatRenderer> void blend_from_lut(const SrcPixelFormatRenderer& src, const color_type* color_lut, const rect_i* rect_src_ptr = 0, int dx = 0, int dy = 0, cover_type cover = agg::cover_full) { rect_i rsrc(0, 0, src.width(), src.height()); if(rect_src_ptr) { rsrc.x1 = rect_src_ptr->x1; rsrc.y1 = rect_src_ptr->y1; rsrc.x2 = rect_src_ptr->x2 + 1; rsrc.y2 = rect_src_ptr->y2 + 1; } // Version with xdst, ydst (absolute positioning) //rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); // Version with dx, dy (relative positioning) rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); if(rc.x2 > 0) { int incy = 1; if(rdst.y1 > rsrc.y1) { rsrc.y1 += rc.y2 - 1; rdst.y1 += rc.y2 - 1; incy = -1; } while(rc.y2 > 0) { typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); if(rw.ptr) { int x1src = rsrc.x1; int x1dst = rdst.x1; int len = rc.x2; if(rw.x1 > x1src) { x1dst += rw.x1 - x1src; len -= rw.x1 - x1src; x1src = rw.x1; } if(len > 0) { if(x1src + len-1 > rw.x2) { len -= x1src + len - rw.x2 - 1; } if(len > 0) { m_ren->blend_from_lut(src, color_lut, x1dst, rdst.y1, x1src, rsrc.y1, len, cover); } } } rdst.y1 += incy; rsrc.y1 += incy; --rc.y2; } } } private: pixfmt_type* m_ren; rect_i m_clip_box; }; } #endif |