Mercurial > jwe > octave
view libgui/graphics/gl-select.cc @ 21209:67d2965af0b5
revamp text rendering classes
* base-text-renderer.h: New file.
* ft-text-renderer.h, ft-text-renderer.cc: New files for freetype text
rendering classes, adapted from txt-eng-ft.h and txt-eng.cc.
* text-renderer.h, text-renderer.cc: New files. Public interface for
text rendering.
* gl-select.cc, gl-render.cc, gl-render.h, gl2ps-print.cc,
graphics.cc, graphics.in.h: Adapt to use new text rendering interface
that does not require checking HAVE_FREETYPE.
* libinterp/corefcn/module.mk: Update.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Sat, 06 Feb 2016 08:15:53 -0500 |
parents | 710e700cdd7f |
children | 40de9f8f23a6 |
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/* Copyright (C) 2011-2015 Michael Goffioul This file is part of Octave. Octave 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 3 of the License, or (at your option) any later version. Octave 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 Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <iostream> #include "gl-select.h" void opengl_selector::apply_pick_matrix (void) { GLdouble p_matrix[16]; GLint viewport[4]; glGetDoublev (GL_PROJECTION_MATRIX, p_matrix); glGetIntegerv (GL_VIEWPORT, viewport); glMatrixMode (GL_PROJECTION); glLoadIdentity (); gluPickMatrix (xp, yp, size, size, viewport); glMultMatrixd (p_matrix); glMatrixMode (GL_MODELVIEW); } void opengl_selector::setup_opengl_transformation (const axes::properties& props) { opengl_renderer::setup_opengl_transformation (props); apply_pick_matrix (); } void opengl_selector::init_marker (const std::string& m, double sz, float width) { opengl_renderer::init_marker (m, sz, width); apply_pick_matrix (); } # define BUFFER_SIZE 128 graphics_object opengl_selector::select (const graphics_object& ax, int x, int y, int flags) { glEnable (GL_DEPTH_TEST); glDepthFunc (GL_LEQUAL); xp = x; yp = y; GLuint select_buffer[BUFFER_SIZE]; glSelectBuffer (BUFFER_SIZE, select_buffer); glRenderMode (GL_SELECT); glInitNames (); object_map.clear (); draw (ax); int hits = glRenderMode (GL_RENDER); graphics_object obj; if (hits > 0) { GLuint current_minZ = 0xffffffff; GLuint current_name = 0xffffffff; for (int i = 0, j = 0; i < hits && j < BUFFER_SIZE-3; i++) { GLuint n = select_buffer[j++], minZ = select_buffer[j++]; j++; // skip maxZ if (((flags & select_last) == 0 && (minZ <= current_minZ)) || ((flags & select_last) != 0 && (minZ >= current_minZ))) { bool candidate = true; GLuint name = select_buffer[std::min (j + n, GLuint (BUFFER_SIZE)) - 1]; if ((flags & select_ignore_hittest) == 0) { graphics_object go = object_map[name]; if (! go.get_properties ().is_hittest ()) candidate = false; } if (candidate) { current_minZ = minZ; current_name = name; } j += n; } else j += n; } if (current_name != 0xffffffff) obj = object_map[current_name]; } else if (hits < 0) warning ("opengl_selector::select: selection buffer overflow"); object_map.clear (); return obj; } void opengl_selector::draw (const graphics_object& go, bool toplevel) { GLuint name = object_map.size (); object_map[name] = go; glPushName (name); opengl_renderer::draw (go, toplevel); glPopName (); } void opengl_selector::fake_text (double x, double y, double z, const Matrix& bbox, bool use_scale) { ColumnVector xpos, xp1, xp2; xpos = get_transform ().transform (x, y, z, use_scale); xp1 = xp2 = xpos; xp1(0) += bbox(0); xp1(1) -= bbox(1); xp2(0) += (bbox(0) + bbox(2)); xp2(1) -= (bbox(1) + bbox(3)); ColumnVector p1, p2, p3, p4; p1 = get_transform ().untransform (xp1(0), xp1(1), xp1(2), false); p2 = get_transform ().untransform (xp2(0), xp1(1), xp1(2), false); p3 = get_transform ().untransform (xp2(0), xp2(1), xp1(2), false); p4 = get_transform ().untransform (xp1(0), xp2(1), xp1(2), false); glBegin (GL_QUADS); glVertex3dv (p1.data ()); glVertex3dv (p2.data ()); glVertex3dv (p3.data ()); glVertex3dv (p4.data ()); glEnd (); } void opengl_selector::draw_text (const text::properties& props) { if (props.get_string ().is_empty ()) return; Matrix pos = props.get_data_position (); const Matrix bbox = props.get_extent_matrix (); fake_text (pos(0), pos(1), pos.numel () > 2 ? pos(2) : 0.0, bbox); } Matrix opengl_selector::render_text (const std::string& txt, double x, double y, double z, int halign, int valign, double rotation) { uint8NDArray pixels; Matrix bbox (1, 4, 0.0); // FIXME: probably more efficient to only compute bbox instead // of doing full text rendering... text_to_pixels (txt, pixels, bbox, halign, valign, rotation); fake_text(x, y, z, bbox, false); return bbox; } void opengl_selector::draw_image (const image::properties& props) { Matrix xd = props.get_xdata ().matrix_value (); octave_idx_type nc = props.get_cdata ().columns (); double x_pix_size = (nc == 1 ? 1 : (xd(1) - xd(0)) / (nc - 1)); Matrix yd = props.get_ydata ().matrix_value (); octave_idx_type nr = props.get_cdata ().rows (); double y_pix_size = (nr == 1 ? 1 : (yd(1) - yd(0)) / (nr - 1)); ColumnVector p1(3, 0.0), p2(3, 0.0), p3(3, 0.0), p4(3, 0.0); p1(0) = xd(0) - x_pix_size/2; p1(1) = yd(0) - y_pix_size/2; p2(0) = xd(1) + x_pix_size/2; p2(1) = yd(0) - y_pix_size/2; p3(0) = xd(1) + x_pix_size/2; p3(1) = yd(1) + y_pix_size/2; p4(0) = xd(0) - x_pix_size/2; p4(1) = yd(1) + y_pix_size/2; glBegin (GL_QUADS); glVertex3dv (p1.data ()); glVertex3dv (p2.data ()); glVertex3dv (p3.data ()); glVertex3dv (p4.data ()); glEnd (); }