mirror of
https://github.com/love2d/love.git
synced 2026-08-16 00:02:12 +02:00
Bill Meltsner
148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
/**
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* Copyright (c) 2006-2011 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "Glyph.h"
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// STD
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#include <cstring> // For memcpy
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namespace love
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{
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namespace graphics
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{
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namespace opengl
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{
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Glyph::Glyph(love::font::GlyphData * data, const Image::Filter& filter_)
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: data(data),
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width((float)data->getWidth()), height((float)data->getHeight()),
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texture(0), filter(filter_)
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{
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data->retain();
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memset(vertices, 255, sizeof(vertex)*4);
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vertices[0].x = 0; vertices[0].y = 0;
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vertices[1].x = 0; vertices[1].y = height;
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vertices[2].x = width; vertices[2].y = height;
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vertices[3].x = width; vertices[3].y = 0;
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vertices[0].s = 0; vertices[0].t = 0;
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vertices[1].s = 0; vertices[1].t = 1;
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vertices[2].s = 1; vertices[2].t = 1;
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vertices[3].s = 1; vertices[3].t = 0;
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}
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Glyph::~Glyph()
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{
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if(data != 0)
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data->release();
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unload();
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}
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void Glyph::draw(float x, float y, float angle, float sx, float sy, float ox, float oy) const
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{
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static Matrix t;
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t.setTransformation(x, y, angle, sx, sy, ox, oy);
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if(texture != 0)
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glBindTexture(GL_TEXTURE_2D,texture);
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glPushMatrix();
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glMultMatrixf((const GLfloat*)t.getElements());
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glTranslatef(static_cast<float>(data->getBearingX()), static_cast<float>(-data->getBearingY()), 0.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glVertexPointer(2, GL_FLOAT, sizeof(vertex), (GLvoid*)&vertices[0].x);
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glTexCoordPointer(2, GL_FLOAT, sizeof(vertex), (GLvoid*)&vertices[0].s);
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glDrawArrays(GL_QUADS, 0, 4);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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bool Glyph::load()
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{
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return loadVolatile();
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}
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void Glyph::unload()
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{
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unloadVolatile();
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}
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bool Glyph::loadVolatile()
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{
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GLint format = GL_RGBA;
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if (data->getFormat() == love::font::GlyphData::FORMAT_LUMINANCE_ALPHA) format = GL_LUMINANCE_ALPHA;
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glGenTextures(1,&texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
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(filter.mag == Image::FILTER_LINEAR) ? GL_LINEAR : GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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(filter.min == Image::FILTER_LINEAR) ? GL_LINEAR : GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexImage2D(GL_TEXTURE_2D,
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0,
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GL_RGBA,
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(GLsizei)width,
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(GLsizei)height,
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0,
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format,
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GL_UNSIGNED_BYTE,
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data->getData());
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return true;
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}
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void Glyph::unloadVolatile()
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{
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// Delete the hardware texture.
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if(texture != 0)
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{
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glDeleteTextures(1, (GLuint*)&texture);
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texture = 0;
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}
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}
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float Glyph::getWidth() const
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{
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return width;
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}
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float Glyph::getHeight() const
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{
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return height;
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}
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} // opengl
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} // graphics
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} // love
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