91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file dynamicTextGlyph.cxx
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* @author drose
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* @date 2002-02-09
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*/
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#include "dynamicTextGlyph.h"
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#ifdef HAVE_FREETYPE
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#include "dynamicTextFont.h"
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#include "dynamicTextPage.h"
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#include "geomTextGlyph.h"
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#include "geomVertexData.h"
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#include "geomVertexFormat.h"
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#include "geomTriangles.h"
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#include "geomVertexWriter.h"
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#include "textureAttrib.h"
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#include "transparencyAttrib.h"
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#include "colorAttrib.h"
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#include "renderState.h"
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#include "config_gobj.h"
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TypeHandle DynamicTextGlyph::_type_handle;
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/**
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*
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*/
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DynamicTextGlyph::
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~DynamicTextGlyph() {
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}
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/**
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* Returns a pointer to the first byte in the pixel buffer associated with the
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* leftmost pixel in the indicated row, where 0 is the topmost row and _y_size
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* - _margin * 2 - 1 is the bottommost row.
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*/
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unsigned char *DynamicTextGlyph::
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get_row(int y) {
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nassertr(y >= 0 && y < _y_size - _margin * 2, nullptr);
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nassertr(_page != nullptr, nullptr);
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// First, offset y by the glyph's start.
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y += _y + _margin;
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// Also, get the x start.
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int x = _x + _margin;
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// Invert y.
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y = _page->get_y_size() - 1 - y;
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int offset = (y * _page->get_x_size()) + x;
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int pixel_width = _page->get_num_components() * _page->get_component_width();
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return _page->modify_ram_image() + offset * pixel_width;
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}
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/**
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* Erases the glyph from the texture map.
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*/
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void DynamicTextGlyph::
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erase(DynamicTextFont *font) {
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nassertv(_page != nullptr);
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nassertv(_page->has_ram_image());
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// The glyph covers the pixels from (_x, _y) over the rectangle (_x_size,
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// _y_size), but it doesn't include _margin pixels around the interior of
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// the rectangle. Erase all the pixels that the glyph covers.
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_page->fill_region(_x + _margin,
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_page->get_y_size() - (_y + _y_size - _margin),
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_x_size - _margin * 2, _y_size - _margin * 2,
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font->get_bg());
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}
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/**
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* Returns true if this glyph represents invisible whitespace, or false if it
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* corresponds to some visible character.
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*/
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bool DynamicTextGlyph::
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is_whitespace() const {
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return (_page == nullptr);
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}
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#endif // HAVE_FREETYPE
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