295 lines
8.2 KiB
C++
295 lines
8.2 KiB
C++
/*************************************************************************/
|
|
/* editor_atlas_packer.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#include "editor_atlas_packer.h"
|
|
|
|
void EditorAtlasPacker::_plot_triangle(Ref<BitMap> p_bitmap, Vector2i *vertices) {
|
|
|
|
int width = p_bitmap->get_size().width;
|
|
int height = p_bitmap->get_size().height;
|
|
int x[3];
|
|
int y[3];
|
|
|
|
for (int j = 0; j < 3; j++) {
|
|
|
|
x[j] = vertices[j].x;
|
|
y[j] = vertices[j].y;
|
|
}
|
|
|
|
// sort the points vertically
|
|
if (y[1] > y[2]) {
|
|
SWAP(x[1], x[2]);
|
|
SWAP(y[1], y[2]);
|
|
}
|
|
if (y[0] > y[1]) {
|
|
SWAP(x[0], x[1]);
|
|
SWAP(y[0], y[1]);
|
|
}
|
|
if (y[1] > y[2]) {
|
|
SWAP(x[1], x[2]);
|
|
SWAP(y[1], y[2]);
|
|
}
|
|
|
|
double dx_far = double(x[2] - x[0]) / (y[2] - y[0] + 1);
|
|
double dx_upper = double(x[1] - x[0]) / (y[1] - y[0] + 1);
|
|
double dx_low = double(x[2] - x[1]) / (y[2] - y[1] + 1);
|
|
double xf = x[0];
|
|
double xt = x[0] + dx_upper; // if y[0] == y[1], special case
|
|
for (int yi = y[0]; yi <= (y[2] > height - 1 ? height - 1 : y[2]); yi++) {
|
|
if (yi >= 0) {
|
|
for (int xi = (xf > 0 ? int(xf) : 0); xi <= (xt < width ? xt : width - 1); xi++) {
|
|
//pixels[int(x + y * width)] = color;
|
|
|
|
p_bitmap->set_bit(Point2(xi, yi), true);
|
|
}
|
|
|
|
for (int xi = (xf < width ? int(xf) : width - 1); xi >= (xt > 0 ? xt : 0); xi--) {
|
|
|
|
p_bitmap->set_bit(Point2(xi, yi), true);
|
|
}
|
|
}
|
|
xf += dx_far;
|
|
if (yi < y[1])
|
|
xt += dx_upper;
|
|
else
|
|
xt += dx_low;
|
|
}
|
|
}
|
|
void EditorAtlasPacker::chart_pack(Vector<Chart> &charts, int &r_width, int &r_height, int p_atlas_max_size, int p_cell_resolution) {
|
|
|
|
int divide_by = MIN(64, p_cell_resolution);
|
|
Vector<PlottedBitmap> bitmaps;
|
|
|
|
int max_w = 0;
|
|
|
|
for (int i = 0; i < charts.size(); i++) {
|
|
|
|
const Chart &chart = charts[i];
|
|
|
|
//generate aabb
|
|
|
|
Rect2i aabb;
|
|
int vertex_count = chart.vertices.size();
|
|
const Vector2 *vertices = chart.vertices.ptr();
|
|
|
|
for (int j = 0; j < vertex_count; j++) {
|
|
|
|
if (j == 0) {
|
|
aabb.position = vertices[j];
|
|
} else {
|
|
aabb.expand_to(vertices[j]);
|
|
}
|
|
}
|
|
|
|
Ref<BitMap> src_bitmap;
|
|
src_bitmap.instance();
|
|
src_bitmap->create(aabb.size / divide_by);
|
|
|
|
int w = src_bitmap->get_size().width;
|
|
int h = src_bitmap->get_size().height;
|
|
|
|
//plot triangles, using divisor
|
|
|
|
for (int j = 0; j < chart.faces.size(); j++) {
|
|
|
|
Vector2i v[3];
|
|
for (int k = 0; k < 3; k++) {
|
|
Vector2 vtx = chart.vertices[chart.faces[j].vertex[k]];
|
|
vtx -= aabb.position;
|
|
vtx /= divide_by;
|
|
v[k] = vtx;
|
|
}
|
|
|
|
_plot_triangle(src_bitmap, v);
|
|
}
|
|
|
|
//src_bitmap->convert_to_image()->save_png("bitmap" + itos(i) + ".png");
|
|
|
|
//grow by 1 for each side
|
|
|
|
int bmw = src_bitmap->get_size().width + 2;
|
|
int bmh = src_bitmap->get_size().height + 2;
|
|
|
|
int heights_size = -1;
|
|
bool transpose = false;
|
|
if (chart.can_transpose && bmh > bmw) {
|
|
heights_size = bmh;
|
|
transpose = true;
|
|
} else {
|
|
heights_size = bmw;
|
|
}
|
|
|
|
max_w = MAX(max_w, heights_size);
|
|
|
|
Vector<int> top_heights;
|
|
Vector<int> bottom_heights;
|
|
top_heights.resize(heights_size);
|
|
bottom_heights.resize(heights_size);
|
|
|
|
for (int x = 0; x < heights_size; x++) {
|
|
top_heights.write[x] = -1;
|
|
bottom_heights.write[x] = 0x7FFFFFFF;
|
|
}
|
|
|
|
for (int x = 0; x < bmw; x++) {
|
|
for (int y = 0; y < bmh; y++) {
|
|
bool found_pixel = false;
|
|
for (int lx = x - 1; lx < x + 2 && !found_pixel; lx++) {
|
|
for (int ly = y - 1; ly < y + 2 && !found_pixel; ly++) {
|
|
|
|
int px = lx - 1;
|
|
if (px < 0 || px >= w)
|
|
continue;
|
|
int py = ly - 1;
|
|
if (py < 0 || py >= h)
|
|
continue;
|
|
|
|
if (src_bitmap->get_bit(Vector2(px, py))) {
|
|
found_pixel = true;
|
|
}
|
|
}
|
|
}
|
|
if (found_pixel) {
|
|
|
|
if (transpose) {
|
|
if (x > top_heights[y]) {
|
|
top_heights.write[y] = x;
|
|
}
|
|
if (x < bottom_heights[y]) {
|
|
bottom_heights.write[y] = x;
|
|
}
|
|
} else {
|
|
if (y > top_heights[x]) {
|
|
top_heights.write[x] = y;
|
|
}
|
|
if (y < bottom_heights[x]) {
|
|
bottom_heights.write[x] = y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
String row;
|
|
for (int j = 0; j < top_heights.size(); j++) {
|
|
row += "(" + itos(top_heights[j]) + "-" + itos(bottom_heights[j]) + "),";
|
|
}
|
|
|
|
PlottedBitmap plotted_bitmap;
|
|
plotted_bitmap.offset = aabb.position;
|
|
plotted_bitmap.top_heights = top_heights;
|
|
plotted_bitmap.bottom_heights = bottom_heights;
|
|
plotted_bitmap.chart_index = i;
|
|
plotted_bitmap.transposed = transpose;
|
|
plotted_bitmap.area = bmw * bmh;
|
|
|
|
bitmaps.push_back(plotted_bitmap);
|
|
}
|
|
|
|
bitmaps.sort();
|
|
|
|
int atlas_max_width = nearest_power_of_2_templated(p_atlas_max_size) / divide_by;
|
|
int atlas_w = nearest_power_of_2_templated(max_w);
|
|
int atlas_h;
|
|
while (true) {
|
|
atlas_h = 0;
|
|
|
|
//do a tetris
|
|
Vector<int> heights;
|
|
heights.resize(atlas_w);
|
|
for (int i = 0; i < atlas_w; i++) {
|
|
heights.write[i] = 0;
|
|
}
|
|
|
|
int *atlas_ptr = heights.ptrw();
|
|
|
|
for (int i = 0; i < bitmaps.size(); i++) {
|
|
|
|
int best_height = 0x7FFFFFFF;
|
|
int best_height_offset = -1;
|
|
int w = bitmaps[i].top_heights.size();
|
|
|
|
const int *top_heights = bitmaps[i].top_heights.ptr();
|
|
const int *bottom_heights = bitmaps[i].bottom_heights.ptr();
|
|
|
|
for (int j = 0; j < atlas_w - w; j++) {
|
|
|
|
int height = 0;
|
|
|
|
for (int k = 0; k < w; k++) {
|
|
|
|
int pixmap_h = bottom_heights[k];
|
|
if (pixmap_h == -1) {
|
|
continue; //no pixel here, anything is fine
|
|
}
|
|
|
|
int h = MAX(0, atlas_ptr[j + k] - pixmap_h);
|
|
if (h > height) {
|
|
height = h;
|
|
}
|
|
}
|
|
|
|
if (height < best_height) {
|
|
best_height = height;
|
|
best_height_offset = j;
|
|
}
|
|
}
|
|
|
|
for (int j = 0; j < w; j++) { //add
|
|
if (top_heights[j] == -1) { //unused
|
|
continue;
|
|
}
|
|
int height = best_height + top_heights[j] + 1;
|
|
atlas_ptr[j + best_height_offset] = height;
|
|
atlas_h = MAX(atlas_h, height);
|
|
}
|
|
|
|
// set
|
|
Vector2 offset = bitmaps[i].offset;
|
|
if (bitmaps[i].transposed) {
|
|
SWAP(offset.x, offset.y);
|
|
}
|
|
|
|
Vector2 final_pos = Vector2(best_height_offset * divide_by, best_height * divide_by) + Vector2(divide_by, divide_by) - offset;
|
|
charts.write[bitmaps[i].chart_index].final_offset = final_pos;
|
|
charts.write[bitmaps[i].chart_index].transposed = bitmaps[i].transposed;
|
|
}
|
|
|
|
if (atlas_h <= atlas_w * 2 || atlas_w >= atlas_max_width) {
|
|
break; //ok this one is enough
|
|
}
|
|
|
|
//try again
|
|
atlas_w *= 2;
|
|
}
|
|
|
|
r_width = atlas_w * divide_by;
|
|
r_height = atlas_h * divide_by;
|
|
}
|