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/*=========================================================================
Program: Visualization Toolkit
Module: TestGL2PSAddPolyPrimitive.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// This test checks that we can use GL2PS without an OpenGL context using
// a buffer size of 0, gl2psAddPolyPrimitive, and gl2psForceRasterPos.
#include "vtk_gl2ps.h"
#include "vtkTestingInteractor.h"
#include <iostream>
#include <string>
#include <vector>
namespace {
static inline void setVertex(GL2PSvertex &vert,
float x, float y, float z,
float r, float g, float b, float a)
{
vert.xyz[0] = x;
vert.xyz[1] = y;
vert.xyz[2] = z;
vert.rgba[0] = r;
vert.rgba[1] = g;
vert.rgba[2] = b;
vert.rgba[3] = a;
}
static inline void generatePixelData(std::vector<float> &data,
size_t width, size_t height)
{
data.resize(width * height * 4);
for (size_t h = 0; h < height; ++h)
{
size_t rowOffset = h * width * 4;
for (size_t w = 0; w < width; ++w)
{
size_t pixel = rowOffset + (w * 4);
data[pixel ] = h / static_cast<float>(height);
data[pixel + 1] = 0.f;
data[pixel + 2] = w / static_cast<float>(width);
data[pixel + 3] = 1.f;
}
}
}
} // end anon namespace
int TestGL2PSAddPolyPrimitive(int , char * [])
{
std::string filename = vtkTestingInteractor::TempDirectory +
std::string("/TestGL2PSAddPolyPrimitive.ps");
FILE *stream = fopen(filename.c_str(), "wb");
if (stream == NULL)
{
std::cerr << "Error opening output file." << std::endl;
return EXIT_FAILURE;
}
GLint viewport[4] = { 0, 0, 400, 400 };
GLint result = gl2psBeginPage("AddPolyPrimitive Test", "VTK", viewport,
GL2PS_PS, GL2PS_SIMPLE_SORT,
GL2PS_NO_OPENGL_CONTEXT | GL2PS_NO_BLENDING,
GL_RGBA, 0, NULL, 0, 0, 0, 0, stream, 0);
if (result != GL2PS_SUCCESS)
{
std::cerr << "gl2psBeginPage failed." << std::endl;
return EXIT_FAILURE;
}
// AddPolyPrimitive arguments:
GL2PSvertex vertices[3]; // Vertices.
GLint offset = 0; // line offset
GLushort pattern = 0xffff; // glLineStipple pattern
GLint factor = 1; // glLineStipple repeat factor
GLfloat ofactor = 0.f; // glPolygonOffset factor
GLfloat ounits = 0.f; // glPolygonOffset units
GLfloat width = 1; // linewidth or pointsize
// Something to do with gl2psEnable(GL2PS_POLYGON_BOUNDARY), which is not
// implemented according to the docs.
char boundary = 0;
// Point:
setVertex(vertices[0], 200, 307.5, 0, 0.f, 0.f, 1.f, 1.f);
gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, offset, ofactor, ounits,
pattern, factor, /*width=*/15, boundary);
// Line:
// Note that the first vertex's color is used for the entire line.
setVertex(vertices[0], 100, 50, 0, 1.f, 0.f, 0.f, 1.f);
setVertex(vertices[1], 300, 50, 0, 0.f, 0.f, 1.f, 1.f);
gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, offset, ofactor, ounits,
pattern, factor, width, boundary);
// Triangle:
setVertex(vertices[0], 100, 100, 0, 1.f, 0.f, 0.f, 1.f);
setVertex(vertices[1], 300, 100, 0, 0.f, 1.f, 0.f, 1.f);
setVertex(vertices[2], 200, 300, 0, 0.f, 0.f, 1.f, 1.f);
gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, offset, ofactor, ounits,
pattern, factor, width, boundary);
// Text:
setVertex(vertices[0], 200, 325, 0, 0.f, 0.f, 0.f, 1.f);
gl2psForceRasterPos(vertices);
gl2psTextOpt("GL2PS with no OpenGL", "Helvetica", 12, GL2PS_TEXT_B, 0.f);
// DrawPixels:
std::vector<float> pixelData;
generatePixelData(pixelData, 100, 100);
setVertex(vertices[0], 275, 275, 0, 0.f, 0.f, 0.f, 0.f);
gl2psForceRasterPos(vertices);
gl2psDrawPixels(100, 100, 0, 0, GL_RGBA, GL_FLOAT, &pixelData[0]);
result = gl2psEndPage();
if (result != GL2PS_SUCCESS)
{
std::cerr << "gl2psEndPage failed." << std::endl;
return EXIT_FAILURE;
}
fclose(stream);
return EXIT_SUCCESS;
}
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