WIP "Bloom" magic effect. Mend crash in "perspective.c"
This commit is contained in:
Bill Kendrick
parent
65da4f4df4
commit
948158c1fd
4 changed files with 412 additions and 13 deletions
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@ -7,7 +7,7 @@ Various contributors (see below, and AUTHORS.txt)
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https://tuxpaint.org/
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2022.January.30 (0.9.29)
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2023.February.6 (0.9.29)
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* Improvements to "Stamp" tool:
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-----------------------------
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* Stamps may now be rotated.
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@ -32,8 +32,7 @@ https://tuxpaint.org/
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(Inspired by "Night Sky Scene [Pen Parallax]" Scratch Project
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by -HexaScape- <https://scratch.mit.edu/users/-HexaScape->)
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[WIP] - Fur sound effect needed
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[WIP] - Fur sound icon needed
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[WIP] - Fur icon needed
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("Circles" and "Rays" sound effects based on Richard Wagner's
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"Ride of the Valkyries", recording licensed as Creative Commons
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@ -43,6 +42,12 @@ https://tuxpaint.org/
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("Fur" sound effected licensed as Creative Commons 0 (CC0 1.0)
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by https://freesound.org/people/Kawgrim/)
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* "Bloom" - Apply a glowing light bloom effect to the image.
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Bill Kendrick <bill@newbreedsoftware.com>
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[WIP] - Bloom icon needed
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[WIP] - Bloom sound effect needed
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* [WIP] "Rivulet"; apply rivulets of water to the canvas
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- needs better icon
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- needs sound effect
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@ -167,6 +172,10 @@ https://tuxpaint.org/
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(h/t Miyagi Andel for reporting & Shin-ichi TOYAMA for pinpointing
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the issue)
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* Mend crash bug in "perspective.c" Magic tools.
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(Perspective, Panels, Timezoom, Zoom, Rush)
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Bill Kendrick <bill@newbreedsoftware.com>
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* Disallow using Ctrl-Z shortcut while drawing or rotating shapes
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or shapes, to avoid unexpected results.
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Closes https://sourceforge.net/p/tuxpaint/bugs/239/
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BIN
magic/icons/bloom.png
Normal file
BIN
magic/icons/bloom.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 7.7 KiB |
367
magic/src/bloom.c
Normal file
367
magic/src/bloom.c
Normal file
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@ -0,0 +1,367 @@
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/* bloom.c
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Applies a "bloom" effect to the image.
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(https://en.wikipedia.org/wiki/Bloom_(shader_effect))
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Last updated: February 6, 2023
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*/
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#include <stdio.h>
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#include <string.h>
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#include <libintl.h>
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#include <math.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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/* Radius of the painting tool */
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#define BLOOM_PAINT_RADIUS 24
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/* Overall weight to apply the sampled pixels */
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#define BLOOM_WEIGHT_CONST 0.025
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/* Length of spike shape */
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#define BLOOM_SPIKE_LENGTH 5
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/* From https://www.shadertoy.com/view/lsXGWn */
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//float sample_weights[9] = {
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// 0.05, 0.09, 0.12, 0.15, 0.16, 0.15, 0.12, 0.09, 0.05
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//};
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/* Take N digits consecutive digits (1-n), calculate SIN() of
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* (PI/(N+1))*n, take the SQRT(), and scale by a constant
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* so they all SUM() to approx. 1.0000 */
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#define NUM_SAMPLE_WEIGHTS 13
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float sample_weights[NUM_SAMPLE_WEIGHTS] = {
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0.0449, 0.0627, 0.0752, 0.0842, 0.0904, 0.0940, 0.0952, 0.0940, 0.0904, 0.0842, 0.0752, 0.0627, 0.0449
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};
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Mix_Chunk * snd_effects = NULL;
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Uint8 * bloom_mask = NULL;
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int bloom_scale;
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Uint32 bloom_api_version(void);
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int bloom_init(magic_api * api);
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int bloom_get_tool_count(magic_api * api);
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SDL_Surface *bloom_get_icon(magic_api * api, int which);
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char *bloom_get_name(magic_api * api, int which);
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int bloom_get_group(magic_api * api, int which);
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char *bloom_get_description(magic_api * api, int which, int mode);
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int bloom_requires_colors(magic_api * api, int which);
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int bloom_modes(magic_api * api, int which);
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void bloom_shutdown(magic_api * api);
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void bloom_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x,
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int y, SDL_Rect * update_rect);
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void bloom_set_color(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
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void bloom_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox, int oy, int x, int y,
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SDL_Rect * update_rect);
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void bloom_line_callback_drag(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int x, int y);
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void bloom_release(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect);
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void bloom_switchin(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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void bloom_switchout(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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float luminance(float r, float g, float b);
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float change_luminance(float c_in, float l_in, float l_out);
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Uint32 bloom_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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int bloom_init(magic_api * api)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%ssounds/magic/bloom.ogg",
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api->data_directory);
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snd_effects = NULL; /* FIXME Mix_LoadWAV(fname); */
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bloom_scale = sqrt(2 * (BLOOM_PAINT_RADIUS * BLOOM_PAINT_RADIUS));
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return (1);
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}
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int bloom_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return (1);
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}
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SDL_Surface *bloom_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/bloom.png",
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api->data_directory);
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return (IMG_Load(fname));
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}
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char *bloom_get_name(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return strdup(gettext("Bloom"));
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}
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int bloom_get_group(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_COLOR_FILTERS;
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}
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char *bloom_get_description(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return strdup(gettext("Bloom!")); /* FIXME */
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}
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int bloom_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return 0; /* TODO: Maybe some day? */
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}
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int bloom_modes(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED ATTRIBUTE_UNUSED)
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{
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return (MODE_PAINT | MODE_FULLSCREEN);
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}
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void bloom_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (snd_effects != NULL) {
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Mix_FreeChunk(snd_effects);
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snd_effects = NULL;
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}
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if (bloom_mask != NULL) {
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free(bloom_mask);
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bloom_mask = NULL;
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}
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}
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void
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bloom_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect)
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{
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if (bloom_mask == NULL)
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return;
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if (snd_effects != NULL)
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api->stopsound();
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if (mode == MODE_PAINT) {
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memset(bloom_mask, 0, (canvas->w * canvas->h));
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bloom_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
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} else {
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if (snd_effects != NULL) {
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api->playsound(snd_effects, (x * 255) / canvas->w, 255);
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}
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memset(bloom_mask, 128, (canvas->w * canvas->h));
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bloom_release(api, which, canvas, snapshot, x, y,
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update_rect);
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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}
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void
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bloom_drag(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect)
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{
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if (bloom_mask == NULL)
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return;
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api->line((void *) api, which, canvas, snapshot, ox, oy, x, y, 1 /* FIXME: Consider fewer iterations? */,
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bloom_line_callback_drag);
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/* FIXME: Would be good to only update the area around the line (ox,oy)->(x,y) (+/- the maxium radius of the effect) */
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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void bloom_release(magic_api * api, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * snapshot ATTRIBUTE_UNUSED,
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int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED) {
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int sample, offset, offset_flip, xx, yy;
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Uint8 r, g, b;
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float rf, gf, bf, mask_weight, lum;
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float sums[3];
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Uint32 color;
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if (bloom_mask == NULL)
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return;
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if (snd_effects != NULL)
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api->stopsound();
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SDL_BlitSurface(snapshot, NULL, canvas, NULL);
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for (y = 0; y < canvas->h; y++) {
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for (x = 0; x < canvas->w; x++) {
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if (bloom_mask[y * canvas->w + x] > 0) {
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sums[0] = 0.0;
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sums[1] = 0.0;
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sums[2] = 0.0;
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/* (Pull from snapshot) */
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for (sample = 0; sample < NUM_SAMPLE_WEIGHTS; sample++) {
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/* Horizontal samples */
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color = api->getpixel(snapshot, x - ((NUM_SAMPLE_WEIGHTS - 1) / 2) + sample, y);
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SDL_GetRGB(color, snapshot->format, &r, &g, &b);
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sums[0] += r * sample_weights[sample];
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sums[1] += g * sample_weights[sample];
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sums[2] += b * sample_weights[sample];
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/* Vertical samples */
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color = api->getpixel(snapshot, x, y - ((NUM_SAMPLE_WEIGHTS - 1) / 2) + sample);
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SDL_GetRGB(color, snapshot->format, &r, &g, &b);
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sums[0] += r * sample_weights[sample];
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sums[1] += g * sample_weights[sample];
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sums[2] += b * sample_weights[sample];
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}
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/* (Blend an "X" shape, additively, onto target canvas) */
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for (offset = -BLOOM_SPIKE_LENGTH; offset <= BLOOM_SPIKE_LENGTH; offset++) {
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for (offset_flip = -1; offset <= 1; offset += 2) {
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xx = x + offset;
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yy = y + (offset * offset_flip);
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if (xx >= 0 && xx < canvas->w && yy >= 0 && yy < canvas->h) {
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color = api->getpixel(snapshot, xx, yy);
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SDL_GetRGB(color, snapshot->format, &r, &g, &b);
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mask_weight = (float) (bloom_mask[(yy) * canvas->w + xx] / 255.0);
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mask_weight *= BLOOM_WEIGHT_CONST;
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mask_weight *= ((BLOOM_SPIKE_LENGTH + 1) - (abs(offset)) / BLOOM_SPIKE_LENGTH);
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rf = (((float) r) + (sums[0] * mask_weight)) / 255.0;
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gf = (((float) g) + (sums[1] * mask_weight)) / 255.0;
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bf = (((float) b) + (sums[2] * mask_weight)) / 255.0;
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/* Reinhard Tonemap (Luminence) */
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lum = luminance(rf, gf, bf);
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if (lum > 0.0) {
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float numerator = lum * (1.0f + lum);
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float l_new = numerator / (1.0f + lum);
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rf = change_luminance(rf, lum, l_new);
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gf = change_luminance(gf, lum, l_new);
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bf = change_luminance(bf, lum, l_new);
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}
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/* Clamp */
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if (rf > 1.0)
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rf = 1.0;
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if (gf > 1.0)
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gf = 1.0;
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if (bf > 1.0)
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bf = 1.0;
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rf *= 255.0;
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gf *= 255.0;
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bf *= 255.0;
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, (Uint8) rf, (Uint8) gf, (Uint8) bf));
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}
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}
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}
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}
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}
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}
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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void bloom_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED,
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Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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/* TODO: Maybe some day? */
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}
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void bloom_line_callback_drag(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas,
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SDL_Surface * snapshot ATTRIBUTE_UNUSED,
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int x, int y)
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{
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int xrad, yrad, xx, yy, chg, n;
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magic_api *api = (magic_api *) ptr;
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if (snd_effects != NULL)
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api->playsound(snd_effects, (x * 255) / canvas->w, 255);
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for (yrad = -BLOOM_PAINT_RADIUS; yrad < BLOOM_PAINT_RADIUS; yrad++) {
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yy = y + yrad;
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if (yy >= 0 && yy < canvas->h) {
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for (xrad = -BLOOM_PAINT_RADIUS; xrad < BLOOM_PAINT_RADIUS; xrad++) {
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xx = x + xrad;
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if (xx >= 0 && xx < canvas->w) {
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if (api->in_circle(xrad, yrad, BLOOM_PAINT_RADIUS)) {
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/* Add to the bloom mask */
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n = (int) bloom_mask[yy * canvas->w + xx];
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chg = sqrt(bloom_scale - sqrt((xrad * xrad) + (yrad * yrad)));
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n += chg;
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if (n > 255) {
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n = 255;
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}
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bloom_mask[yy * canvas->w + xx] = (Uint8) n;
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/* Draw on the canvas temporarily */
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, n, n, n));
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}
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}
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}
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}
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}
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}
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void bloom_switchin(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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if (bloom_mask == NULL)
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bloom_mask = (Uint8 *) malloc(sizeof(Uint8) * canvas-> w * canvas->h);
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}
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void bloom_switchout(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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}
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float luminance(float r, float g, float b) {
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return (r * 0.2126) + (g * 0.7152) + (b * 0.0722);
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}
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float change_luminance(float c_in, float l_in, float l_out) {
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return c_in * (l_out / l_in);
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}
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@ -32,7 +32,7 @@
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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(See COPYING.txt)
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Last updated: January 25, 2023
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Last updated: February 6, 2023
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*/
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#include <stdio.h>
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@ -146,7 +146,7 @@ enum
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/* A copy of canvas at switchin, will be used to draw from it as snapshot changes at each click */
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static SDL_Surface *canvas_back;
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static SDL_Surface *canvas_back = NULL;
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static Mix_Chunk *perspective_snd_effect[perspective_NUM_TOOLS + 1];
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@ -252,6 +252,9 @@ void perspective_drag(magic_api * api, int which, SDL_Surface * canvas,
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int oy ATTRIBUTE_UNUSED, int x, int y,
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SDL_Rect * update_rect)
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{
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if (canvas_back == NULL)
|
||||
return;
|
||||
|
||||
latest_x = x;
|
||||
latest_y = y;
|
||||
|
||||
|
|
@ -479,6 +482,9 @@ void perspective_release(magic_api * api, int which,
|
|||
SDL_Surface * canvas, SDL_Surface * last, int x,
|
||||
int y, SDL_Rect * update_rect)
|
||||
{
|
||||
if (canvas_back == NULL)
|
||||
return;
|
||||
|
||||
if (which == TOOL_PANELS)
|
||||
return;
|
||||
|
||||
|
|
@ -662,6 +668,10 @@ void perspective_release(magic_api * api, int which,
|
|||
canvas->format->Gmask,
|
||||
canvas->format->Bmask, 0);
|
||||
|
||||
printf("SDL_BlitSurface(canvas_back (%d), update_rect (%d), aux_surf (%d), NULL\n",
|
||||
canvas_back, update_rect, aux_surf);
|
||||
fflush(stdout);
|
||||
|
||||
SDL_BlitSurface(canvas_back, update_rect, aux_surf, NULL);
|
||||
scaled_surf = api->scale(aux_surf, canvas->w, canvas->h, 0);
|
||||
SDL_BlitSurface(scaled_surf, NULL, canvas, NULL);
|
||||
|
|
@ -687,6 +697,9 @@ void perspective_preview(magic_api * api, int which,
|
|||
int ox_distance, oy_distance;
|
||||
int center_ofset_x, center_ofset_y;
|
||||
|
||||
if (canvas_back == NULL)
|
||||
return;
|
||||
|
||||
|
||||
update_rect->x = update_rect->y = 0;
|
||||
update_rect->w = canvas->w;
|
||||
|
|
@ -826,6 +839,7 @@ void perspective_switchin(magic_api * api ATTRIBUTE_UNUSED,
|
|||
amask =
|
||||
~(canvas->format->Rmask | canvas->format->Gmask | canvas->format->Bmask);
|
||||
|
||||
if (canvas_back == NULL) {
|
||||
canvas_back = SDL_CreateRGBSurface(SDL_SWSURFACE,
|
||||
canvas->w,
|
||||
canvas->h,
|
||||
|
|
@ -833,6 +847,12 @@ void perspective_switchin(magic_api * api ATTRIBUTE_UNUSED,
|
|||
canvas->format->Rmask,
|
||||
canvas->format->Gmask,
|
||||
canvas->format->Bmask, amask);
|
||||
}
|
||||
|
||||
if (canvas_back == NULL) {
|
||||
fprintf(stderr, "perspective cannot create background canvas!\n");
|
||||
return;
|
||||
}
|
||||
|
||||
SDL_BlitSurface(canvas, NULL, canvas_back, NULL);
|
||||
}
|
||||
|
|
@ -842,7 +862,10 @@ void perspective_switchout(magic_api * api ATTRIBUTE_UNUSED,
|
|||
int mode ATTRIBUTE_UNUSED,
|
||||
SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
||||
{
|
||||
if (canvas_back != NULL) {
|
||||
SDL_FreeSurface(canvas_back);
|
||||
canvas_back = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
int perspective_modes(magic_api * api ATTRIBUTE_UNUSED, int which)
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue