/*
......... 2015 Ivan Mahonin
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fstream>
#include <iostream>
#include <GL/gl.h>
#include <GL/glext.h>
#include <GL/glx.h>
#include "test.h"
#include "contour.h"
#include "rendersw.h"
#include "contourbuilder.h"
using namespace std;
class Test::Helper {
public:
static void save_rgba(
const void *buffer,
int width,
int height,
bool flip,
const string &filename )
{
// create file
ofstream f(filename.c_str(), ofstream::out | ofstream::trunc | ofstream::binary);
// write header
unsigned char targa_header[] = {
0, // Length of the image ID field (0 - no ID field)
0, // Whether a color map is included (0 - no colormap)
2, // Compression and color types (2 - uncompressed true-color image)
0, 0, 0, 0, 0, // Color map specification (not need for us)
0, 0, // X-origin
0, 0, // Y-origin
(unsigned char)(width & 0xff), // Image width
(unsigned char)(width >> 8),
(unsigned char)(height & 0xff), // Image height
(unsigned char)(height >> 8),
32, // Bits per pixel
0 // Image descriptor (keep zero for capability)
};
f.write((char*)targa_header, sizeof(targa_header));
// write data
if (flip) {
int line_size = 4*width;
const char *end = (char*)buffer;
const char *current = end + height*line_size;
while(current > end) {
current -= line_size;
f.write(current, line_size);
}
} else {
f.write((const char*)buffer, 4*width*height);
}
}
static void save_viewport(const string &filename) {
glFinish();
int vp[4] = {};
glGetIntegerv(GL_VIEWPORT, vp);
char *buffer = new char[vp[2]*vp[3]*4];
glReadPixels(vp[0], vp[1], vp[2], vp[3], GL_BGRA, GL_UNSIGNED_BYTE, buffer);
save_rgba(buffer, vp[2], vp[3], false, filename);
delete buffer;
}
static void save_surface(const Surface &surface, const string &filename) {
unsigned char *buffer = new unsigned char[4*surface.count()];
unsigned char *j = buffer;
for(Color *i = surface.data, *end = i + surface.count(); i != end; ++i, j += 4) {
j[0] = (unsigned char)roundf(max(0.f, min(1.f, i->b))*255.f);
j[1] = (unsigned char)roundf(max(0.f, min(1.f, i->g))*255.f);
j[2] = (unsigned char)roundf(max(0.f, min(1.f, i->r))*255.f);
j[3] = (unsigned char)roundf(max(0.f, min(1.f, i->a))*255.f);
}
save_rgba(buffer, surface.width, surface.height, false, filename);
delete buffer;
}
static void draw_contour_strip(const vector<Vector> &c) {
glBegin(GL_TRIANGLE_STRIP);
for(vector<Vector>::const_iterator i = c.begin(); i != c.end(); ++i) {
glVertex2d(i->x, i->y);
glVertex2d(-1.0, i->y);
}
glEnd();
}
static void draw_contour_strip(const Contour &c) {
glBegin(GL_TRIANGLE_STRIP);
const Contour::ChunkList &chunks = c.get_chunks();
Vector prev;
for(Contour::ChunkList::const_iterator i = chunks.begin(); i != chunks.end(); ++i) {
if ( i->type == Contour::LINE
|| i->type == Contour::CLOSE)
{
glVertex2d(i->p1.x, i->p1.y);
glVertex2d(-1.0, i->p1.y);
prev.x = -1.0;
prev.y = i->p1.y;
} else {
glVertex2d(prev.x, prev.y);
glVertex2d(prev.x, prev.y);
glVertex2d(i->p1.x, i->p1.y);
glVertex2d(i->p1.x, i->p1.y);
prev = i->p1;
}
}
glEnd();
}
static void draw_contour_strip(const int &count) {
glDrawArrays(GL_TRIANGLE_STRIP, 0, count);
}
template<typename T>
static void draw_contour(const T &c, bool even_odd, bool invert) {
glPushAttrib(GL_ALL_ATTRIB_BITS);
glEnable(GL_STENCIL_TEST);
// render mask
glClear(GL_STENCIL_BUFFER_BIT);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glStencilFunc(GL_ALWAYS, 0, 0);
if (even_odd) {
glStencilOp(GL_INCR_WRAP, GL_INCR_WRAP, GL_INCR_WRAP);
} else {
glStencilOpSeparate(GL_FRONT, GL_INCR_WRAP, GL_INCR_WRAP, GL_INCR_WRAP);
glStencilOpSeparate(GL_BACK, GL_DECR_WRAP, GL_DECR_WRAP, GL_DECR_WRAP);
}
draw_contour_strip(c);
// fill mask
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
if (!even_odd && !invert)
glStencilFunc(GL_NOTEQUAL, 0, -1);
if (!even_odd && invert)
glStencilFunc(GL_EQUAL, 0, -1);
if ( even_odd && !invert)
glStencilFunc(GL_EQUAL, 1, 1);
if ( even_odd && invert)
glStencilFunc(GL_EQUAL, 0, 1);
glBegin(GL_TRIANGLE_STRIP);
glVertex2d(-1.0, -1.0);
glVertex2d( 1.0, -1.0);
glVertex2d(-1.0, 1.0);
glVertex2d( 1.0, 1.0);
glEnd();
glPopAttrib();
}
};
Test::Wrapper::~Wrapper() {
if (!surface) glFinish();
Real ms = 1000.0*(Real)(clock() - t)/(Real)(CLOCKS_PER_SEC);
cout << ms << " ms - " << filename << endl;
if (filename.size() > 4 && filename.substr(filename.size()-4, 4) == ".tga") {
if (surface)
Helper::save_surface(*surface, filename);
else
Helper::save_viewport(filename);
}
if (surface) {
surface->clear();
} else {
glClear(GL_COLOR_BUFFER_BIT);
glFinish();
}
}
void Test::test1() {
vector<Vector> c;
ContourBuilder::build_simple(c);
cout << c.size() << " vertices" << endl;
glPushAttrib(GL_ALL_ATTRIB_BITS);
glColor4d(0.0, 0.0, 1.0, 1.0);
{
Wrapper t("test_1_contour.tga");
glBegin(GL_LINE_STRIP);
for(vector<Vector>::const_iterator i = c.begin(); i != c.end(); ++i)
glVertex2d(i->x, i->y);
glEnd();
}
{
Wrapper t("test_1_contour_fill.tga");
Helper::draw_contour(c, false, false);
}
{
Wrapper t("test_1_contour_fill_invert.tga");
Helper::draw_contour(c, false, true);
}
{
Wrapper t("test_1_contour_evenodd.tga");
Helper::draw_contour(c, true, false);
}
{
Wrapper t("test_1_contour_evenodd_invert.tga");
Helper::draw_contour(c, true, true);
}
glPopAttrib();
}
void Test::test2() {
Contour c, cc;
ContourBuilder::build(cc);
cout << cc.get_chunks().size() << " commands" << endl;
Rect bounds;
bounds.p0 = Vector(-1.0, -1.0);
bounds.p1 = Vector( 1.0, 1.0);
Vector min_size(1.0/1024.0, 1.0/1024.0);
{
Wrapper("test_2_split");
cc.split(c, bounds, min_size);
}
const Contour::ChunkList &chunks = c.get_chunks();
cout << chunks.size() << " vertices" << endl;
glPushAttrib(GL_ALL_ATTRIB_BITS);
glColor4d(0.0, 0.0, 1.0, 1.0);
GLuint buf_id = 0;
int count = 0;
vector<Vector> vertices;
{
Wrapper t("test_2_init_buffer");
vertices.resize(4*chunks.size());
glGenBuffers(1, &buf_id);
glBindBuffer(GL_ARRAY_BUFFER, buf_id);
glBufferData( GL_ARRAY_BUFFER,
vertices.size()*sizeof(Vector),
&vertices.front(),
GL_DYNAMIC_DRAW );
vertices.clear();
}
{
Wrapper t("test_2_prepare_data");
for(Contour::ChunkList::const_iterator i = chunks.begin(); i != chunks.end(); ++i) {
if ( i->type == Contour::LINE
|| i->type == Contour::CLOSE)
{
vertices.push_back(i->p1);
vertices.push_back(Vector(-1.0, i->p1.y));
} else {
vertices.push_back(vertices.empty() ? Vector() : vertices.back());
vertices.push_back(vertices.back());
vertices.push_back(i->p1);
vertices.push_back(i->p1);
}
}
count = vertices.size();
}
{
Wrapper t("test_2_send_data");
glBufferData( GL_ARRAY_BUFFER,
vertices.size()*sizeof(Vector),
&vertices.front(),
GL_DYNAMIC_DRAW );
glVertexPointer(2, GL_FLOAT, sizeof(Vector), 0);
}
{
Wrapper t("test_2_contour.tga");
glBegin(GL_LINE_STRIP);
for(Contour::ChunkList::const_iterator i = chunks.begin(); i != chunks.end(); ++i)
glVertex2d(i->p1.x, i->p1.y);
glEnd();
}
{
Wrapper t("test_2_contour_fill.tga");
Helper::draw_contour(count, false, false);
}
{
Wrapper t("test_2_contour_fill_invert.tga");
Helper::draw_contour(count, false, true);
}
{
Wrapper t("test_2_contour_evenodd.tga");
Helper::draw_contour(count, true, false);
}
{
Wrapper t("test_2_contour_evenodd_invert.tga");
Helper::draw_contour(count, true, true);
}
glDeleteBuffers(1, &buf_id);
glPopAttrib();
}
void Test::test3() {
Contour c;
ContourBuilder::build(c);
cout << c.get_chunks().size() << " commands" << endl;
Rect bounds;
bounds.p0 = Vector(-1.0, -1.0);
bounds.p1 = Vector( 1.0, 1.0);
Rect pixel_bounds;
pixel_bounds.p0 = Vector( 0.0, 0.0);
pixel_bounds.p1 = Vector(1024.0, 1024.0);
c.transform(bounds, pixel_bounds);
Polyspan polyspan;
polyspan.init(0, 0, 1024, 1024);
Surface surface(1024, 1024);
Color color(0.f, 0.f, 1.f, 1.f);
{
Wrapper("test_3_build_polyspan");
c.to_polyspan(polyspan);
}
cout << polyspan.get_covers().size() << " covers" << endl;
glPushAttrib(GL_ALL_ATTRIB_BITS);
glColor4d(0.0, 0.0, 1.0, 1.0);
{
Wrapper t("test_3_polyspan_gl_lines.tga");
glBegin(GL_LINE_STRIP);
for(Polyspan::cover_array::const_iterator i = polyspan.get_covers().begin(); i != polyspan.get_covers().end(); ++i)
glVertex2d((double)i->x/1024.0*2.0 - 1.0, (double)i->y/1024.0*2.0 - 1.0);
glEnd();
}
glPopAttrib();
{
Wrapper("test_3_polyspan_sort");
polyspan.sort_marks();
}
{
Wrapper t("test_3_polyspan_fill.tga", surface);
RenderSW::polyspan(surface, polyspan, color, false, false);
}
{
Wrapper t("test_3_polyspan_fill_invert.tga", surface);
RenderSW::polyspan(surface, polyspan, color, false, true);
}
{
Wrapper t("test_3_polyspan_evenodd.tga", surface);
RenderSW::polyspan(surface, polyspan, color, true, false);
}
{
Wrapper t("test_3_polyspan_evenodd_invert.tga", surface);
RenderSW::polyspan(surface, polyspan, color, true, true);
}
}