147 lines
4.5 KiB
C
147 lines
4.5 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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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/** \file blender/blenkernel/intern/icons_rasterize.c
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* \ingroup bke
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*/
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#include "MEM_guardedalloc.h"
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#include "BLI_utildefines.h"
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#include "BLI_bitmap_draw_2d.h"
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#include "BLI_math_geom.h"
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#include "IMB_imbuf.h"
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#include "IMB_imbuf_types.h"
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#include "BKE_icons.h"
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#include "BLI_strict_flags.h"
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struct UserRasterInfo {
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int pt[3][2];
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const uint *color;
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/* only for smooth shading */
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struct {
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float pt_fl[3][2];
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uint color_u[3][4];
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} smooth;
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int rect_size[2];
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uint *rect;
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};
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static void tri_fill_flat(int x, int x_end, int y, void *user_data)
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{
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struct UserRasterInfo *data = user_data;
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uint *p = &data->rect[(y * data->rect_size[1]) + x];
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uint col = data->color[0];
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while (x++ != x_end) {
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*p++ = col;
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}
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}
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static void tri_fill_smooth(int x, int x_end, int y, void *user_data)
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{
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struct UserRasterInfo *data = user_data;
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uint *p = &data->rect[(y * data->rect_size[1]) + x];
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float pt_step_fl[2] = {(float)x, (float)y};
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while (x++ != x_end) {
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float w[3];
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barycentric_weights_v2_clamped(UNPACK3(data->smooth.pt_fl), pt_step_fl, w);
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uint col_u[4] = {0, 0, 0, 0};
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for (uint corner = 0; corner < 3; corner++) {
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for (uint chan = 0; chan < 4; chan++) {
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col_u[chan] += data->smooth.color_u[corner][chan] * (uint)(w[corner] * 255.0f);
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}
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}
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union {
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uint as_u32;
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uchar as_bytes[4];
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} col;
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col.as_bytes[0] = (uchar)(col_u[0] / 255);
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col.as_bytes[1] = (uchar)(col_u[1] / 255);
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col.as_bytes[2] = (uchar)(col_u[2] / 255);
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col.as_bytes[3] = (uchar)(col_u[3] / 255);
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*p++ = col.as_u32;
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pt_step_fl[0] += 1.0f;
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}
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}
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ImBuf *BKE_icon_geom_rasterize(
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const struct Icon_Geom *geom,
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const unsigned int size_x, const unsigned int size_y)
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{
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const int coords_len = geom->coords_len;
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const uchar (*pos)[2] = geom->coords;
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const uint *col = (void *)geom->colors;
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/* TODO(campbell): Currently rasterizes to fixed size, then scales.
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* Should rasterize to double size for eg instead. */
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const int rect_size[2] = {max_ii(256, (int)size_x * 2), max_ii(256, (int)size_y * 2)};
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ImBuf *ibuf = IMB_allocImBuf((uint)rect_size[0], (uint)rect_size[1], 32, IB_rect);
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struct UserRasterInfo data;
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data.rect_size[0] = rect_size[0];
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data.rect_size[1] = rect_size[1];
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data.rect = ibuf->rect;
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float scale[2];
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const bool use_scale = (rect_size[0] != 256) || (rect_size[1] != 256);
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if (use_scale) {
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scale[0] = ((float)rect_size[0] / 256.0f);
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scale[1] = ((float)rect_size[1] / 256.0f);
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}
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for (int t = 0; t < coords_len; t += 1, pos += 3, col += 3) {
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if (use_scale) {
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ARRAY_SET_ITEMS(data.pt[0], (int)(pos[0][0] * scale[0]), (int)(pos[0][1] * scale[1]));
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ARRAY_SET_ITEMS(data.pt[1], (int)(pos[1][0] * scale[0]), (int)(pos[1][1] * scale[1]));
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ARRAY_SET_ITEMS(data.pt[2], (int)(pos[2][0] * scale[0]), (int)(pos[2][1] * scale[1]));
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}
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else {
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ARRAY_SET_ITEMS(data.pt[0], UNPACK2(pos[0]));
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ARRAY_SET_ITEMS(data.pt[1], UNPACK2(pos[1]));
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ARRAY_SET_ITEMS(data.pt[2], UNPACK2(pos[2]));
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}
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data.color = col;
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if ((col[0] == col[1]) && (col[0] == col[2])) {
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BLI_bitmap_draw_2d_tri_v2i(UNPACK3(data.pt), tri_fill_flat, &data);
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}
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else {
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ARRAY_SET_ITEMS(data.smooth.pt_fl[0], UNPACK2_EX((float), data.pt[0], ));
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ARRAY_SET_ITEMS(data.smooth.pt_fl[1], UNPACK2_EX((float), data.pt[1], ));
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ARRAY_SET_ITEMS(data.smooth.pt_fl[2], UNPACK2_EX((float), data.pt[2], ));
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ARRAY_SET_ITEMS(data.smooth.color_u[0], UNPACK4_EX((uint), ((uchar *)(col + 0)), ));
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ARRAY_SET_ITEMS(data.smooth.color_u[1], UNPACK4_EX((uint), ((uchar *)(col + 1)), ));
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ARRAY_SET_ITEMS(data.smooth.color_u[2], UNPACK4_EX((uint), ((uchar *)(col + 2)), ));
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BLI_bitmap_draw_2d_tri_v2i(UNPACK3(data.pt), tri_fill_smooth, &data);
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}
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}
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IMB_scaleImBuf(ibuf, size_x, size_y);
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return ibuf;
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}
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