meshfont.cpp

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/* xoreos - A reimplementation of BioWare's Aurora engine
 *
 * xoreos is the legal property of its developers, whose names
 * can be found in the AUTHORS file distributed with this source
 * distribution.
 *
 * xoreos 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.
 *
 * xoreos 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 xoreos. If not, see <http://www.gnu.org/licenses/>.
 */

#include "src/graphics/mesh/meshfont.h"

namespace Graphics {

namespace Mesh {

MeshFont::MeshFont() : Mesh(GL_QUADS, GL_DYNAMIC_DRAW) {
    // Each vertex is { x, y, z, u, v, r, g, b, a }
    _vertexBuffer.setSize(4, 9 * sizeof(float));

    VertexDecl vertexDecl;
    vertexDecl.push_back(VertexAttrib(VPOSITION, 3, GL_FLOAT));
    vertexDecl.push_back(VertexAttrib(VTCOORD, 2, GL_FLOAT));
    vertexDecl.push_back(VertexAttrib(VCOLOR, 4, GL_FLOAT));
    _vertexBuffer.setVertexDeclLinear(4, vertexDecl);

    // Fill in some valid data so that mesh init doesn't go beserk.
    float *verts = static_cast<float *>(_vertexBuffer.getData());

    // Position Data.
    *verts++ = -1.0f;
    *verts++ = 0.0f;
    *verts++ = 0.0f;

    *verts++ = 0.0f;
    *verts++ = 1.0f;
    *verts++ = 0.0f;

    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 0.0f;

    *verts++ = 1.0f;
    *verts++ = 0.0f;
    *verts++ = 0.0f;

    // UV coordinates.
    *verts++ = 0.0f;
    *verts++ = 0.0f;

    *verts++ = 0.0f;
    *verts++ = 1.0f;

    *verts++ = 1.0f;
    *verts++ = 1.0f;

    *verts++ = 1.0f;
    *verts++ = 0.0f;

    // Colour information.
    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;

    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;

    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;

    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;
    *verts++ = 1.0f;
}

void MeshFont::render(float *pos, float *uv, float *rgba) {
    float *verts = static_cast<float *>(_vertexBuffer.getData());
    for (uint32 i = 0; i < 12; ++i) {
        verts[i] = pos[i];
    }
    for (uint32 i = 0; i < 8; ++i) {
        verts[i+12] = uv[i];
    }
    for (uint32 i = 0; i < 16; ++i) {
        verts[i+20] = rgba[i];
    }
    _vertexBuffer.updateGLBound();
    glDrawArrays(_type, 0, _vertexBuffer.getCount());
}

} // End of namespace Mesh

} // End of namespace Graphics