353 lines
9.1 KiB
C
353 lines
9.1 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Matt Ebb, Campbell Barton, Shuvro Sarker
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/image_gen.c
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* \ingroup bke
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*/
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#include <math.h>
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#include <stdlib.h>
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#include "BLI_math_base.h"
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#include "BLI_math_color.h"
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#include "BLI_math_vector.h"
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#include "BKE_image.h"
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#include "BLF_api.h"
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void BKE_image_buf_fill_color(unsigned char *rect, float *rect_float, int width, int height, const float color[4])
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{
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int x, y;
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/* blank image */
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if (rect_float) {
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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copy_v4_v4(rect_float, color);
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rect_float += 4;
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}
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}
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}
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if (rect) {
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unsigned char ccol[4];
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rgba_float_to_uchar(ccol, color);
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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rect[0] = ccol[0];
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rect[1] = ccol[1];
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rect[2] = ccol[2];
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rect[3] = ccol[3];
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rect += 4;
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}
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}
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}
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}
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void BKE_image_buf_fill_checker(unsigned char *rect, float *rect_float, int width, int height)
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{
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/* these two passes could be combined into one, but it's more readable and
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* easy to tweak like this, speed isn't really that much of an issue in this situation... */
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int checkerwidth = 32, dark = 1;
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int x, y;
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unsigned char *rect_orig = rect;
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float *rect_float_orig = rect_float;
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float h = 0.0, hoffs = 0.0;
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float hsv[3] = {0.0f, 0.9f, 0.9f};
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float rgb[3];
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/* checkers */
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for (y = 0; y < height; y++) {
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dark = powf(-1.0f, floorf(y / checkerwidth));
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for (x = 0; x < width; x++) {
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if (x % checkerwidth == 0) dark = -dark;
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if (rect_float) {
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if (dark > 0) {
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rect_float[0] = rect_float[1] = rect_float[2] = 0.25f;
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rect_float[3] = 1.0f;
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}
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else {
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rect_float[0] = rect_float[1] = rect_float[2] = 0.58f;
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rect_float[3] = 1.0f;
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}
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rect_float += 4;
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}
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else {
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if (dark > 0) {
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rect[0] = rect[1] = rect[2] = 64;
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rect[3] = 255;
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}
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else {
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rect[0] = rect[1] = rect[2] = 150;
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rect[3] = 255;
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}
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rect += 4;
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}
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}
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}
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rect = rect_orig;
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rect_float = rect_float_orig;
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/* 2nd pass, colored + */
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for (y = 0; y < height; y++) {
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hoffs = 0.125f * floorf(y / checkerwidth);
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for (x = 0; x < width; x++) {
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h = 0.125f * floorf(x / checkerwidth);
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if ((fabs((x % checkerwidth) - (checkerwidth / 2)) < 4) &&
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(fabs((y % checkerwidth) - (checkerwidth / 2)) < 4))
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{
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if ((fabs((x % checkerwidth) - (checkerwidth / 2)) < 1) ||
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(fabs((y % checkerwidth) - (checkerwidth / 2)) < 1))
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{
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hsv[0] = fmodf(fabs(h - hoffs), 1.0f);
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hsv_to_rgb_v(hsv, rgb);
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if (rect) {
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rect[0] = (char)(rgb[0] * 255.0f);
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rect[1] = (char)(rgb[1] * 255.0f);
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rect[2] = (char)(rgb[2] * 255.0f);
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rect[3] = 255;
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}
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if (rect_float) {
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rect_float[0] = rgb[0];
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rect_float[1] = rgb[1];
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rect_float[2] = rgb[2];
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rect_float[3] = 1.0f;
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}
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}
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}
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if (rect_float) rect_float += 4;
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if (rect) rect += 4;
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}
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}
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}
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/* Utility functions for BKE_image_buf_fill_checker_color */
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#define BLEND_FLOAT(real, add) (real + add <= 1.0f) ? (real + add) : 1.0f
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#define BLEND_CHAR(real, add) ((real + (char)(add * 255.0f)) <= 255) ? (real + (char)(add * 255.0f)) : 255
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static void checker_board_color_fill(unsigned char *rect, float *rect_float, int width, int height)
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{
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int hue_step, y, x;
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float hsv[3], rgb[3];
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hsv[1] = 1.0;
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hue_step = power_of_2_max_i(width / 8);
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if (hue_step < 8) hue_step = 8;
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for (y = 0; y < height; y++) {
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hsv[2] = 0.1 + (y * (0.4 / height)); /* use a number lower then 1.0 else its too bright */
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for (x = 0; x < width; x++) {
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hsv[0] = (float)((double)(x / hue_step) * 1.0 / width * hue_step);
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hsv_to_rgb_v(hsv, rgb);
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if (rect) {
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rect[0] = (char)(rgb[0] * 255.0f);
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rect[1] = (char)(rgb[1] * 255.0f);
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rect[2] = (char)(rgb[2] * 255.0f);
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rect[3] = 255;
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rect += 4;
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}
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if (rect_float) {
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rect_float[0] = rgb[0];
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rect_float[1] = rgb[1];
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rect_float[2] = rgb[2];
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rect_float[3] = 1.0f;
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rect_float += 4;
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}
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}
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}
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}
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static void checker_board_color_tint(unsigned char *rect, float *rect_float, int width, int height, int size, float blend)
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{
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int x, y;
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float blend_half = blend * 0.5f;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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if (((y / size) % 2 == 1 && (x / size) % 2 == 1) || ( (y / size) % 2 == 0 && (x / size) % 2 == 0)) {
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if (rect) {
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rect[0] = (char)BLEND_CHAR(rect[0], blend);
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rect[1] = (char)BLEND_CHAR(rect[1], blend);
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rect[2] = (char)BLEND_CHAR(rect[2], blend);
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rect[3] = 255;
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rect += 4;
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}
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if (rect_float) {
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rect_float[0] = BLEND_FLOAT(rect_float[0], blend);
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rect_float[1] = BLEND_FLOAT(rect_float[1], blend);
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rect_float[2] = BLEND_FLOAT(rect_float[2], blend);
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rect_float[3] = 1.0f;
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rect_float += 4;
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}
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}
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else {
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if (rect) {
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rect[0] = (char)BLEND_CHAR(rect[0], blend_half);
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rect[1] = (char)BLEND_CHAR(rect[1], blend_half);
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rect[2] = (char)BLEND_CHAR(rect[2], blend_half);
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rect[3] = 255;
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rect += 4;
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}
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if (rect_float) {
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rect_float[0] = BLEND_FLOAT(rect_float[0], blend_half);
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rect_float[1] = BLEND_FLOAT(rect_float[1], blend_half);
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rect_float[2] = BLEND_FLOAT(rect_float[2], blend_half);
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rect_float[3] = 1.0f;
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rect_float += 4;
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}
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}
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}
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}
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}
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static void checker_board_grid_fill(unsigned char *rect, float *rect_float, int width, int height, float blend)
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{
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int x, y;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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if (((y % 32) == 0) || ((x % 32) == 0) || x == 0) {
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if (rect) {
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rect[0] = BLEND_CHAR(rect[0], blend);
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rect[1] = BLEND_CHAR(rect[1], blend);
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rect[2] = BLEND_CHAR(rect[2], blend);
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rect[3] = 255;
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rect += 4;
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}
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if (rect_float) {
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rect_float[0] = BLEND_FLOAT(rect_float[0], blend);
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rect_float[1] = BLEND_FLOAT(rect_float[1], blend);
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rect_float[2] = BLEND_FLOAT(rect_float[2], blend);
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rect_float[3] = 1.0f;
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rect_float += 4;
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}
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}
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else {
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if (rect_float) rect_float += 4;
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if (rect) rect += 4;
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}
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}
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}
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}
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/* defined in image.c */
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static void checker_board_text(unsigned char *rect, float *rect_float, int width, int height, int step, int outline)
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{
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int x, y;
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int pen_x, pen_y;
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char text[3] = {'A', '1', '\0'};
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const int mono = blf_mono_font_render;
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BLF_size(mono, 54, 72); /* hard coded size! */
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/* OCIO_TODO: using NULL as display will assume using sRGB display
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* this is correct since currently generated images are assumed to be in sRGB space,
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* but this would probably needed to be fixed in some way
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*/
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BLF_buffer(mono, rect_float, rect, width, height, 4, NULL);
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for (y = 0; y < height; y += step) {
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text[1] = '1';
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for (x = 0; x < width; x += step) {
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/* hard coded offset */
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pen_x = x + 33;
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pen_y = y + 44;
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/* terribly crappy outline font! */
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BLF_buffer_col(mono, 1.0, 1.0, 1.0, 1.0);
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BLF_position(mono, pen_x - outline, pen_y, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x + outline, pen_y, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x, pen_y - outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x, pen_y + outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x - outline, pen_y - outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x + outline, pen_y + outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x - outline, pen_y + outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_position(mono, pen_x + outline, pen_y - outline, 0.0);
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BLF_draw_buffer(mono, text);
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BLF_buffer_col(mono, 0.0, 0.0, 0.0, 1.0);
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BLF_position(mono, pen_x, pen_y, 0.0);
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BLF_draw_buffer(mono, text);
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text[1]++;
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}
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text[0]++;
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}
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/* cleanup the buffer. */
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BLF_buffer(mono, NULL, NULL, 0, 0, 0, NULL);
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}
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void BKE_image_buf_fill_checker_color(unsigned char *rect, float *rect_float, int width, int height)
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{
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checker_board_color_fill(rect, rect_float, width, height);
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checker_board_color_tint(rect, rect_float, width, height, 1, 0.03f);
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checker_board_color_tint(rect, rect_float, width, height, 4, 0.05f);
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checker_board_color_tint(rect, rect_float, width, height, 32, 0.07f);
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checker_board_color_tint(rect, rect_float, width, height, 128, 0.15f);
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checker_board_grid_fill(rect, rect_float, width, height, 1.0f / 4.0f);
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checker_board_text(rect, rect_float, width, height, 128, 2);
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}
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