debd9bd0edbd8275e637b12c93f30c9e3f6372da
1 #define __NR_ARENA_IMAGE_C__
3 /*
4 * RGBA display list system for inkscape
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 *
9 * Copyright (C) 2001-2002 Lauris Kaplinski
10 * Copyright (C) 2001 Ximian, Inc.
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #include <libnr/nr-compose-transform.h>
16 #include <libnr/nr-blit.h>
17 #include "../prefs-utils.h"
18 #include "nr-arena-image.h"
19 #include "style.h"
20 #include "display/nr-arena.h"
21 #include "display/nr-filter.h"
22 #include "display/nr-filter-gaussian.h"
23 #include <livarot/Path.h>
24 #include <livarot/Shape.h>
25 #include "sp-filter.h"
26 #include "sp-filter-reference.h"
27 #include "sp-gaussian-blur.h"
28 #include "sp-feblend.h"
29 #include "display/nr-filter-blend.h"
31 int nr_arena_image_x_sample = 1;
32 int nr_arena_image_y_sample = 1;
34 /*
35 * NRArenaCanvasImage
36 *
37 */
39 // defined in nr-arena-shape.cpp
40 void nr_pixblock_render_shape_mask_or(NRPixBlock &m, Shape *theS);
42 static void nr_arena_image_class_init (NRArenaImageClass *klass);
43 static void nr_arena_image_init (NRArenaImage *image);
44 static void nr_arena_image_finalize (NRObject *object);
46 static unsigned int nr_arena_image_update (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset);
47 static unsigned int nr_arena_image_render (cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags);
48 static NRArenaItem *nr_arena_image_pick (NRArenaItem *item, NR::Point p, double delta, unsigned int sticky);
50 static NRArenaItemClass *parent_class;
52 NRType
53 nr_arena_image_get_type (void)
54 {
55 static NRType type = 0;
56 if (!type) {
57 type = nr_object_register_type (NR_TYPE_ARENA_ITEM,
58 "NRArenaImage",
59 sizeof (NRArenaImageClass),
60 sizeof (NRArenaImage),
61 (void (*) (NRObjectClass *)) nr_arena_image_class_init,
62 (void (*) (NRObject *)) nr_arena_image_init);
63 }
64 return type;
65 }
67 static void
68 nr_arena_image_class_init (NRArenaImageClass *klass)
69 {
70 NRObjectClass *object_class;
71 NRArenaItemClass *item_class;
73 object_class = (NRObjectClass *) klass;
74 item_class = (NRArenaItemClass *) klass;
76 parent_class = (NRArenaItemClass *) ((NRObjectClass *) klass)->parent;
78 object_class->finalize = nr_arena_image_finalize;
79 object_class->cpp_ctor = NRObject::invoke_ctor<NRArenaImage>;
81 item_class->update = nr_arena_image_update;
82 item_class->render = nr_arena_image_render;
83 item_class->pick = nr_arena_image_pick;
84 }
86 static void
87 nr_arena_image_init (NRArenaImage *image)
88 {
89 image->px = NULL;
91 image->pxw = image->pxh = image->pxrs = 0;
92 image->x = image->y = 0.0;
93 image->width = 256.0;
94 image->height = 256.0;
96 nr_matrix_set_identity (&image->grid2px);
98 image->style = 0;
99 }
101 static void
102 nr_arena_image_finalize (NRObject *object)
103 {
104 NRArenaImage *image = NR_ARENA_IMAGE (object);
106 image->px = NULL;
108 ((NRObjectClass *) parent_class)->finalize (object);
109 }
111 static unsigned int
112 nr_arena_image_update (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset)
113 {
114 NRMatrix grid2px;
116 NRArenaImage *image = NR_ARENA_IMAGE (item);
118 /* Request render old */
119 nr_arena_item_request_render (item);
121 /* Copy affine */
122 nr_matrix_invert (&grid2px, &gc->transform);
123 double hscale, vscale; // todo: replace with NR::scale
124 if (image->px) {
125 hscale = image->pxw / image->width;
126 vscale = image->pxh / image->height;
127 } else {
128 hscale = 1.0;
129 vscale = 1.0;
130 }
132 image->grid2px[0] = grid2px.c[0] * hscale;
133 image->grid2px[2] = grid2px.c[2] * hscale;
134 image->grid2px[4] = grid2px.c[4] * hscale;
135 image->grid2px[1] = grid2px.c[1] * vscale;
136 image->grid2px[3] = grid2px.c[3] * vscale;
137 image->grid2px[5] = grid2px.c[5] * vscale;
139 image->grid2px[4] -= image->x * hscale;
140 image->grid2px[5] -= image->y * vscale;
142 /* Calculate bbox */
143 if (image->px) {
144 NRRect bbox;
146 bbox.x0 = image->x;
147 bbox.y0 = image->y;
148 bbox.x1 = image->x + image->width;
149 bbox.y1 = image->y + image->height;
151 image->c00 = (NR::Point(bbox.x0, bbox.y0) * gc->transform);
152 image->c01 = (NR::Point(bbox.x0, bbox.y1) * gc->transform);
153 image->c10 = (NR::Point(bbox.x1, bbox.y0) * gc->transform);
154 image->c11 = (NR::Point(bbox.x1, bbox.y1) * gc->transform);
156 nr_rect_d_matrix_transform (&bbox, &bbox, &gc->transform);
158 item->bbox.x0 = (int) floor (bbox.x0);
159 item->bbox.y0 = (int) floor (bbox.y0);
160 item->bbox.x1 = (int) ceil (bbox.x1);
161 item->bbox.y1 = (int) ceil (bbox.y1);
162 } else {
163 item->bbox.x0 = (int) gc->transform[4];
164 item->bbox.y0 = (int) gc->transform[5];
165 item->bbox.x1 = item->bbox.x0 - 1;
166 item->bbox.y1 = item->bbox.y0 - 1;
167 }
169 nr_arena_item_request_render (item);
171 return NR_ARENA_ITEM_STATE_ALL;
172 }
174 #define FBITS 12
175 #define b2i (image->grid2px)
177 static unsigned int
178 nr_arena_image_render (cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags)
179 {
180 nr_arena_image_x_sample = prefs_get_int_attribute ("options.bitmapoversample", "value", 1);
181 nr_arena_image_y_sample = nr_arena_image_x_sample;
183 bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
185 NRArenaImage *image = NR_ARENA_IMAGE (item);
187 NR::Matrix d2s;
189 d2s[0] = b2i[0];
190 d2s[1] = b2i[1];
191 d2s[2] = b2i[2];
192 d2s[3] = b2i[3];
193 d2s[4] = b2i[0] * pb->area.x0 + b2i[2] * pb->area.y0 + b2i[4];
194 d2s[5] = b2i[1] * pb->area.x0 + b2i[3] * pb->area.y0 + b2i[5];
196 if (!outline) {
198 if (!image->px) return item->state;
200 guint32 Falpha = item->opacity;
201 if (Falpha < 1) return item->state;
203 unsigned char * dpx = NR_PIXBLOCK_PX (pb);
204 int const drs = pb->rs;
205 int const dw = pb->area.x1 - pb->area.x0;
206 int const dh = pb->area.y1 - pb->area.y0;
208 unsigned char * spx = image->px;
209 int const srs = image->pxrs;
210 int const sw = image->pxw;
211 int const sh = image->pxh;
213 if (pb->mode == NR_PIXBLOCK_MODE_R8G8B8) {
214 /* fixme: This is not implemented yet (Lauris) */
215 /* nr_R8G8B8_R8G8B8_R8G8B8A8_N_TRANSFORM (dpx, dw, dh, drs, spx, sw, sh, srs, d2s, Falpha, nr_arena_image_x_sample, nr_arena_image_y_sample); */
216 } else if (pb->mode == NR_PIXBLOCK_MODE_R8G8B8A8P) {
217 nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM (dpx, dw, dh, drs, spx, sw, sh, srs, d2s, Falpha, nr_arena_image_x_sample, nr_arena_image_y_sample);
218 } else if (pb->mode == NR_PIXBLOCK_MODE_R8G8B8A8N) {
220 //FIXME: The _N_N_N_ version gives a gray border around images, see bug 906376
221 // This mode is only used when exporting, screen rendering always has _P_P_P_, so I decided to simply replace it for now
222 // Feel free to propose a better fix
224 //nr_R8G8B8A8_N_R8G8B8A8_N_R8G8B8A8_N_TRANSFORM (dpx, dw, dh, drs, spx, sw, sh, srs, d2s, Falpha, nr_arena_image_x_sample, nr_arena_image_y_sample);
225 nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM (dpx, dw, dh, drs, spx, sw, sh, srs, d2s, Falpha, nr_arena_image_x_sample, nr_arena_image_y_sample);
226 }
228 pb->empty = FALSE;
230 } else { // outline; draw a rect instead
232 if (!ct)
233 return item->state;
235 guint32 rgba = prefs_get_int_attribute("options.wireframecolors", "images", 0xff0000ff);
236 // FIXME: we use RGBA buffers but cairo writes BGRA (on i386), so we must cheat
237 // by setting color channels in the "wrong" order
238 cairo_set_source_rgba(ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
240 cairo_set_line_width(ct, 0.5);
241 cairo_new_path(ct);
243 NR::Point shift(pb->area.x0, pb->area.y0);
244 NR::Point c00 = image->c00 - shift;
245 NR::Point c01 = image->c01 - shift;
246 NR::Point c11 = image->c11 - shift;
247 NR::Point c10 = image->c10 - shift;
249 cairo_move_to (ct, c00[NR::X], c00[NR::Y]);
251 // the box
252 cairo_line_to (ct, c10[NR::X], c10[NR::Y]);
253 cairo_line_to (ct, c11[NR::X], c11[NR::Y]);
254 cairo_line_to (ct, c01[NR::X], c01[NR::Y]);
255 cairo_line_to (ct, c00[NR::X], c00[NR::Y]);
256 // the diagonals
257 cairo_line_to (ct, c11[NR::X], c11[NR::Y]);
258 cairo_move_to (ct, c10[NR::X], c10[NR::Y]);
259 cairo_line_to (ct, c01[NR::X], c01[NR::Y]);
261 cairo_stroke(ct);
263 pb->empty = FALSE;
264 }
266 return item->state;
267 }
269 /** Calculates the closest distance from p to the segment a1-a2*/
270 double
271 distance_to_segment (NR::Point p, NR::Point a1, NR::Point a2)
272 {
273 // calculate sides of the triangle and their squares
274 double d1 = NR::L2(p - a1);
275 double d1_2 = d1 * d1;
276 double d2 = NR::L2(p - a2);
277 double d2_2 = d2 * d2;
278 double a = NR::L2(a1 - a2);
279 double a_2 = a * a;
281 // if one of the angles at the base is > 90, return the corresponding side
282 if (d1_2 + a_2 <= d2_2) return d1;
283 if (d2_2 + a_2 <= d1_2) return d2;
285 // otherwise calculate the height to the base
286 double peri = (a + d1 + d2)/2;
287 return (2*sqrt(peri * (peri - a) * (peri - d1) * (peri - d2))/a);
288 }
290 static NRArenaItem *
291 nr_arena_image_pick (NRArenaItem *item, NR::Point p, double delta, unsigned int sticky)
292 {
293 NRArenaImage *image = NR_ARENA_IMAGE (item);
295 if (!image->px) return NULL;
297 bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
299 if (outline) {
301 // frame
302 if (distance_to_segment (p, image->c00, image->c10) < delta) return item;
303 if (distance_to_segment (p, image->c10, image->c11) < delta) return item;
304 if (distance_to_segment (p, image->c11, image->c01) < delta) return item;
305 if (distance_to_segment (p, image->c01, image->c00) < delta) return item;
307 // diagonals
308 if (distance_to_segment (p, image->c00, image->c11) < delta) return item;
309 if (distance_to_segment (p, image->c10, image->c01) < delta) return item;
311 return NULL;
313 } else {
315 unsigned char *const pixels = image->px;
316 int const width = image->pxw;
317 int const height = image->pxh;
318 int const rowstride = image->pxrs;
319 NR::Point tp = p * image->grid2px;
320 int const ix = (int)(tp[NR::X]);
321 int const iy = (int)(tp[NR::Y]);
323 if ((ix < 0) || (iy < 0) || (ix >= width) || (iy >= height))
324 return NULL;
326 unsigned char *pix_ptr = pixels + iy * rowstride + ix * 4;
327 // is the alpha not transparent?
328 return (pix_ptr[3] > 0) ? item : NULL;
329 }
330 }
332 /* Utility */
334 void
335 nr_arena_image_set_pixels (NRArenaImage *image, unsigned char const *px, unsigned int pxw, unsigned int pxh, unsigned int pxrs)
336 {
337 nr_return_if_fail (image != NULL);
338 nr_return_if_fail (NR_IS_ARENA_IMAGE (image));
340 image->px = (unsigned char *) px;
341 image->pxw = pxw;
342 image->pxh = pxh;
343 image->pxrs = pxrs;
345 nr_arena_item_request_update (NR_ARENA_ITEM (image), NR_ARENA_ITEM_STATE_ALL, FALSE);
346 }
348 void
349 nr_arena_image_set_geometry (NRArenaImage *image, double x, double y, double width, double height)
350 {
351 nr_return_if_fail (image != NULL);
352 nr_return_if_fail (NR_IS_ARENA_IMAGE (image));
354 image->x = x;
355 image->y = y;
356 image->width = width;
357 image->height = height;
359 nr_arena_item_request_update (NR_ARENA_ITEM (image), NR_ARENA_ITEM_STATE_ALL, FALSE);
360 }
362 void nr_arena_image_set_style (NRArenaImage *image, SPStyle *style)
363 {
364 g_return_if_fail(image != NULL);
365 g_return_if_fail(NR_IS_ARENA_IMAGE(image));
367 if (style) sp_style_ref(style);
368 if (image->style) sp_style_unref(image->style);
369 image->style = style;
371 //if image has a filter
372 if (style->filter.set && style->getFilter()) {
373 if (!image->filter) {
374 int primitives = sp_filter_primitive_count(SP_FILTER(style->getFilter()));
375 image->filter = new NR::Filter(primitives);
376 }
377 sp_filter_build_renderer(SP_FILTER(style->getFilter()), image->filter);
378 } else {
379 //no filter set for this image
380 delete image->filter;
381 image->filter = NULL;
382 }
384 if (style && style->enable_background.set
385 && style->enable_background.value == SP_CSS_BACKGROUND_NEW) {
386 image->background_new = true;
387 }
388 }
391 /*
392 Local Variables:
393 mode:c++
394 c-file-style:"stroustrup"
395 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
396 indent-tabs-mode:nil
397 fill-column:99
398 End:
399 */
400 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :