653 lines
20 KiB
C
653 lines
20 KiB
C
/*
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Folds the picture down from the corners.
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Last updated: April 18, 2023
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*/
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//optimized version soon :)
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//when "folding" same corner many times it gives strange results. Now it's allowed. Let me know
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//if you think it shouldn't be.
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//sound playing needs fixing.
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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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#ifdef __ANDROID__
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#define inline static
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#endif
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int right_arm_x, right_arm_y, left_arm_x, left_arm_y;
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int fold_ox, fold_oy;
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int fold_x, fold_y;
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Uint8 fold_shadow_value;
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Uint8 corner;
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Mix_Chunk *fold_snd;
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Uint8 fold_r, fold_g, fold_b;
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Uint32 fold_color;
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SDL_Surface *fold_surface_src, *fold_surface_dst;
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void fold_draw(magic_api * api, int which,
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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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static void fold_erase(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y);
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void translate_coords(SDL_Surface * canvas, int angle);
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SDL_Surface *rotate(magic_api * api, SDL_Surface * canvas, int angle);
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void fold_draw(magic_api * api, int which,
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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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static void fold_print_line(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y);
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static void fold_print_dark_line(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y);
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void translate_xy(SDL_Surface * canvas, int x, int y, int *a, int *b,
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int rotation);
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Uint32 fold_api_version(void);
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void fold_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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int fold_init(magic_api * api, Uint32 disabled_features);
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int fold_get_tool_count(magic_api * api);
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SDL_Surface *fold_get_icon(magic_api * api, int which);
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char *fold_get_name(magic_api * api, int which);
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int fold_get_group(magic_api * api, int which);
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char *fold_get_description(magic_api * api, int which, int mode);
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int fold_requires_colors(magic_api * api, int which);
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void fold_release(magic_api * api, int which,
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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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void fold_shutdown(magic_api * api);
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void fold_click(magic_api * ptr, 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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void fold_preview(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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int fold_modes(magic_api * api, int which);
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// Housekeeping functions
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void fold_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 fold_switchin(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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inline Uint8 fold_what_corner(int x, int y, SDL_Surface * canvas);
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void fold_switchout(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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Uint8 fold_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 fold_default_size(magic_api * api, int which, int mode);
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void fold_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size, SDL_Rect * update_rect);
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Uint32 fold_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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void fold_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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//get the colors from API and store it in structure
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fold_r = r;
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fold_g = g;
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fold_b = b;
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}
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int fold_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%ssounds/magic/fold.wav",
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api->data_directory);
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fold_snd = Mix_LoadWAV(fname);
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return (1);
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}
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int fold_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 *fold_get_icon(magic_api * api ATTRIBUTE_UNUSED,
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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/fold.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 *fold_get_name(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return (gettext_noop("Fold"));
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}
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int fold_get_group(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_PICTURE_WARPS;
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}
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char *fold_get_description(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED)
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{
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return
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strdup(gettext_noop
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("Choose a background color and click to turn the corner of the page over."));
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}
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int fold_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return 1;
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} //selected color will be a "backpage" color
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static void fold_shadow(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * temp, int x,
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int y)
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{
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magic_api *api = (magic_api *) ptr;
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Uint8 r, g, b, a;
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SDL_GetRGBA(api->getpixel(temp, x, y), temp->format, &r, &g, &b, &a);
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api->putpixel(canvas, x, y, SDL_MapRGBA(canvas->format,
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max(r - 160 + fold_shadow_value * 4,
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0),
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max(g - 160 + fold_shadow_value * 4,
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0),
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max(b - 160 + fold_shadow_value * 4,
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0), a));
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}
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void fold_draw(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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float right_step_x, right_step_y, left_step_x, left_step_y;
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float dist_x, dist_y;
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int left_y, right_x;
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float w, h;
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SDL_Surface *temp;
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temp =
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SDL_CreateRGBSurface(SDL_SWSURFACE, canvas->w, canvas->h,
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canvas->format->BitsPerPixel, canvas->format->Rmask,
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canvas->format->Gmask, canvas->format->Bmask,
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canvas->format->Amask);
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SDL_BlitSurface(canvas, 0, temp, 0);
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right_step_x = (float) (x - left_arm_x) / (float) (left_arm_x - fold_ox);
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right_step_y = (float) (y - left_arm_y) / (float) (left_arm_x - fold_ox);
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left_step_x = (float) (x - right_arm_x) / (float) (right_arm_y - fold_oy);
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left_step_y = (float) (y - right_arm_y) / (float) (right_arm_y - fold_oy);
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left_y = (float) right_arm_y / left_arm_x * (left_arm_x - canvas->w);
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right_x = (float) left_arm_x / right_arm_y * (right_arm_y - canvas->h);
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for (w = 0; w < canvas->w; w += 0.5)
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{
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for (h = 0; h < canvas->h; h += 0.5)
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{
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dist_x = right_step_x * w + left_step_x * h;
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dist_y = right_step_y * w + left_step_y * h;
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api->putpixel(canvas, x - dist_x, y - dist_y,
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api->getpixel(temp, w, h));
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}
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}
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// Erasing the triangle.
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// The 1 pixel in plus is a workaround for api-line not getting the end in some lines.
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if (left_arm_x > canvas->w)
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{
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for (h = 0; h <= right_arm_y; h++)
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api->line((void *) api, which, canvas, snapshot, canvas->w, left_y - h,
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-1, right_arm_y - h, 1, fold_erase);
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}
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else if (right_arm_y > canvas->h)
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{
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for (w = 0; w <= left_arm_x; w++)
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api->line((void *) api, which, canvas, snapshot, left_arm_x - w, 0,
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right_x - w, canvas->h + 1, 1, fold_erase);
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}
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else
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for (w = 0; w <= min(left_arm_x, right_arm_y); w++) // The -1 values are because api->line
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api->line((void *) api, which, canvas, snapshot, left_arm_x - w, 0, -1,
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right_arm_y - w, 1, fold_erase);
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SDL_BlitSurface(canvas, 0, temp, 0);
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// Shadows
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if (left_arm_x > canvas->w)
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{
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for (fold_shadow_value = 0; fold_shadow_value < 40;
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fold_shadow_value += 1)
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api->line((void *) api, which, canvas, temp, canvas->w,
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left_y - fold_shadow_value, 0,
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right_arm_y - fold_shadow_value, 1, fold_shadow);
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}
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else if (right_arm_y > canvas->h)
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{
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for (fold_shadow_value = 0; fold_shadow_value < 40;
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fold_shadow_value += 1)
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api->line((void *) api, which, canvas, temp,
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left_arm_x - fold_shadow_value, 0,
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right_x - fold_shadow_value, canvas->h, 1, fold_shadow);
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}
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else
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for (fold_shadow_value = 0; fold_shadow_value < 40;
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fold_shadow_value += 1)
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api->line((void *) api, which, canvas, temp,
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left_arm_x - fold_shadow_value, 0, 0,
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right_arm_y - fold_shadow_value, 1, fold_shadow);
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SDL_BlitSurface(canvas, 0, temp, 0);
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for (fold_shadow_value = 0; fold_shadow_value < 40; fold_shadow_value += 1)
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{
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if (fold_shadow_value * left_step_x > x
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|| fold_shadow_value * right_step_y > y)
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break;
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dist_x = fold_shadow_value * (right_step_x + left_step_x);
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dist_y = fold_shadow_value * (right_step_y + left_step_y);
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api->line((void *) api, which, canvas, temp,
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left_arm_x + fold_shadow_value * right_step_x,
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fold_shadow_value * right_step_y,
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fold_shadow_value * left_step_x,
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right_arm_y + fold_shadow_value * left_step_y, 1, fold_shadow);
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}
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api->line((void *) api, which, canvas, snapshot, x, y, right_arm_x,
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right_arm_y, 1, fold_print_line);
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api->line((void *) api, which, canvas, snapshot, x, y, left_arm_x,
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left_arm_y, 1, fold_print_line);
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api->line((void *) api, which, canvas, snapshot, left_arm_x, left_arm_y,
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right_arm_x, right_arm_y, 1, fold_print_dark_line);
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}
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SDL_Surface *rotate(magic_api * api, SDL_Surface * canvas, int angle)
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{
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SDL_Surface *temp;
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int x, y;
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int a, b;
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if (angle == 180)
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temp =
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SDL_CreateRGBSurface(SDL_SWSURFACE, canvas->w, canvas->h,
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canvas->format->BitsPerPixel,
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canvas->format->Rmask, canvas->format->Gmask,
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canvas->format->Bmask, canvas->format->Amask);
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else
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temp =
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SDL_CreateRGBSurface(SDL_SWSURFACE, canvas->h, canvas->w,
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canvas->format->BitsPerPixel,
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canvas->format->Rmask, canvas->format->Gmask,
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canvas->format->Bmask, canvas->format->Amask);
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switch (angle)
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{
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case 90:
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for (x = 0; x < canvas->w; x++)
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for (y = 0; y < canvas->h; y++)
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{
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translate_xy(canvas, x, y, &a, &b, 90);
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api->putpixel(temp, a, b, api->getpixel(canvas, x, y));
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}
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break;
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case 180:
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// printf("%i, %i\n",temp,canvas);
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for (x = 0; x < canvas->w; x++)
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for (y = 0; y < canvas->h; y++)
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{
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translate_xy(canvas, x, y, &a, &b, 180);
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api->putpixel(temp, a, b, api->getpixel(canvas, x, y));
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}
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break;
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case 270:
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for (x = 0; x < canvas->w; x++)
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for (y = 0; y < canvas->h; y++)
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{
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translate_xy(canvas, x, y, &a, &b, 270);
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api->putpixel(temp, a, b, api->getpixel(canvas, x, y));
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}
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break;
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}
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return temp;
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}
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void translate_coords(SDL_Surface * canvas, int angle)
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{
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int a, b;
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switch (angle)
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{
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case 90:
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translate_xy(canvas, right_arm_x, right_arm_y, &a, &b, 90);
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right_arm_x = a;
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right_arm_y = b;
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translate_xy(canvas, left_arm_x, left_arm_y, &a, &b, 90);
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left_arm_x = a;
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left_arm_y = b;
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break;
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case 180:
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right_arm_x = canvas->w - 1 - right_arm_x;
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right_arm_y = canvas->h - 1 - right_arm_y;
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left_arm_x = canvas->w - 1 - left_arm_x;
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left_arm_y = canvas->h - 1 - left_arm_y;
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break;
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case 270:
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translate_xy(canvas, right_arm_x, right_arm_y, &a, &b, 270);
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right_arm_x = a;
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right_arm_y = b;
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translate_xy(canvas, left_arm_x, left_arm_y, &a, &b, 270);
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left_arm_x = a;
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left_arm_y = b;
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break;
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}
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}
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void translate_xy(SDL_Surface * canvas, int x, int y, int *a, int *b,
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int rotation)
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{
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switch (rotation)
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{
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case 90:
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*a = y;
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*b = canvas->w - 1 - x;
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break;
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case 180:
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*a = canvas->w - 1 - x;
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*b = canvas->h - 1 - y;
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break;
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case 270:
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*a = canvas->h - 1 - y;
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*b = x;
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break;
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}
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}
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void fold_release(magic_api * api, int which,
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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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int a, b;
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SDL_Surface *temp, *temp2;
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x = fold_x;
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y = fold_y;
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fold_ox = fold_oy = 0;
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SDL_BlitSurface(snapshot, 0, canvas, 0);
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switch (corner)
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{
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case 1:
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translate_xy(canvas, x, y, &a, &b, 90);
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translate_coords(canvas, 90);
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temp = rotate(api, canvas, 90);
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fold_draw(api, which, temp, snapshot, a, b, update_rect);
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temp2 = rotate(api, temp, 270);
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SDL_BlitSurface(temp2, 0, canvas, 0);
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SDL_FreeSurface(temp);
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SDL_FreeSurface(temp2);
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break;
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case 2:
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fold_draw(api, which, canvas, snapshot, x, y, update_rect);
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break;
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case 3:
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translate_xy(canvas, x, y, &a, &b, 270);
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translate_coords(canvas, 270);
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temp = rotate(api, canvas, 270);
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fold_draw(api, which, temp, snapshot, a, b, update_rect);
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temp2 = rotate(api, temp, 90);
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SDL_BlitSurface(temp2, 0, canvas, 0);
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SDL_FreeSurface(temp);
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SDL_FreeSurface(temp2);
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break;
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case 4:
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translate_xy(canvas, x, y, &a, &b, 180);
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translate_coords(canvas, 180);
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temp = rotate(api, canvas, 180);
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fold_draw(api, which, temp, snapshot, a, b, update_rect);
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temp2 = rotate(api, temp, 180);
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SDL_BlitSurface(temp2, 0, canvas, 0);
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SDL_FreeSurface(temp);
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SDL_FreeSurface(temp2);
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break;
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}
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update_rect->x = 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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api->playsound(fold_snd, (x * 255) / canvas->w, 255);
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}
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void fold_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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Mix_FreeChunk(fold_snd);
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SDL_FreeSurface(fold_surface_dst);
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SDL_FreeSurface(fold_surface_src);
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}
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// Interactivity functions
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inline Uint8 fold_what_corner(int x, int y, SDL_Surface * canvas)
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{
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if (x >= canvas->w / 2)
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{
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if (y >= canvas->h / 2)
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return 4;
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else
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return 1;
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}
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else
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{
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if (y >= canvas->h / 2)
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return 3;
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else
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return 2;
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}
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}
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static void fold_print_line(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * last, int x,
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int y)
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{
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magic_api *api = (magic_api *) ptr;
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api->putpixel(canvas, x, y, SDL_MapRGB(last->format, 222, 222, 222)); //Middle gray. Color have been set arbitrary.
|
|
}
|
|
|
|
static void fold_print_dark_line(void *ptr, int which ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas,
|
|
SDL_Surface * last ATTRIBUTE_UNUSED, int x,
|
|
int y)
|
|
{
|
|
magic_api *api = (magic_api *) ptr;
|
|
|
|
api->putpixel(canvas, x, y, SDL_MapRGB(last->format, 90, 90, 90)); //It should not look too black nor too white with shadowed colors.
|
|
}
|
|
|
|
static void fold_erase(void *ptr, int which ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas,
|
|
SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y)
|
|
{
|
|
magic_api *api = (magic_api *) ptr;
|
|
|
|
api->putpixel(canvas, x, y,
|
|
SDL_MapRGB(canvas->format, fold_r, fold_g, fold_b));
|
|
}
|
|
|
|
void fold_click(magic_api * ptr, int which, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y,
|
|
SDL_Rect * update_rect)
|
|
{
|
|
magic_api *api = (magic_api *) ptr;
|
|
|
|
corner = fold_what_corner(x, y, snapshot);
|
|
|
|
switch (corner)
|
|
{
|
|
case 1:
|
|
fold_ox = canvas->w - 1;
|
|
fold_oy = 0;
|
|
break;
|
|
case 2:
|
|
fold_ox = fold_oy = 0;
|
|
break;
|
|
case 3:
|
|
fold_ox = 0;
|
|
fold_oy = canvas->h - 1;
|
|
break;
|
|
case 4:
|
|
fold_ox = canvas->w - 1;
|
|
fold_oy = canvas->h - 1;
|
|
break;
|
|
}
|
|
|
|
fold_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
|
|
}
|
|
|
|
void fold_preview(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * snapshot, int ox ATTRIBUTE_UNUSED,
|
|
int oy ATTRIBUTE_UNUSED, int x, int y,
|
|
SDL_Rect * update_rect)
|
|
{
|
|
int middle_point_x;
|
|
int middle_point_y;
|
|
|
|
fold_x = x;
|
|
fold_y = y;
|
|
SDL_BlitSurface(snapshot, 0, canvas, 0);
|
|
|
|
middle_point_x = (fold_ox + x) / 2;
|
|
middle_point_y = (fold_oy + y) / 2;
|
|
|
|
switch (corner)
|
|
{
|
|
case 1: //Right Upper
|
|
right_arm_x =
|
|
fold_ox - (fold_ox - middle_point_x) -
|
|
middle_point_y * middle_point_y / (fold_ox - middle_point_x);
|
|
right_arm_y = fold_oy;
|
|
|
|
left_arm_x = fold_ox;
|
|
left_arm_y =
|
|
fold_oy - (fold_oy - middle_point_y) - (fold_ox -
|
|
middle_point_x) * (fold_ox -
|
|
middle_point_x)
|
|
/ (fold_oy - middle_point_y);
|
|
break;
|
|
|
|
case 2: //LU
|
|
right_arm_x = fold_ox;
|
|
right_arm_y =
|
|
middle_point_y + middle_point_x * middle_point_x / middle_point_y;
|
|
|
|
left_arm_x =
|
|
middle_point_x + middle_point_y * middle_point_y / middle_point_x;
|
|
left_arm_y = fold_oy;
|
|
break;
|
|
|
|
case 3: //LL
|
|
right_arm_x =
|
|
middle_point_x + (fold_oy - middle_point_y) * (fold_oy -
|
|
middle_point_y) /
|
|
middle_point_x;
|
|
right_arm_y = fold_oy;
|
|
|
|
left_arm_x = fold_ox;
|
|
left_arm_y =
|
|
fold_oy - (fold_oy - middle_point_y) - (fold_ox -
|
|
middle_point_x) * (fold_ox -
|
|
middle_point_x)
|
|
/ (fold_oy - middle_point_y);
|
|
break;
|
|
|
|
case 4: //RL
|
|
right_arm_x = fold_ox;
|
|
right_arm_y =
|
|
fold_oy - (fold_oy - middle_point_y) - (fold_ox -
|
|
middle_point_x) * (fold_ox -
|
|
middle_point_x)
|
|
/ (fold_oy - middle_point_y);
|
|
|
|
left_arm_x =
|
|
fold_ox - (fold_ox - middle_point_x) - (fold_oy -
|
|
middle_point_y) * (fold_oy -
|
|
middle_point_y)
|
|
/ (fold_ox - middle_point_x);
|
|
left_arm_y = fold_oy;
|
|
break;
|
|
}
|
|
|
|
api->line((void *) api, which, canvas, snapshot, x, y, right_arm_x,
|
|
right_arm_y, 1, fold_print_line);
|
|
api->line((void *) api, which, canvas, snapshot, x, y, left_arm_x,
|
|
left_arm_y, 1, fold_print_line);
|
|
api->line((void *) api, which, canvas, snapshot, left_arm_x, left_arm_y,
|
|
right_arm_x, right_arm_y, 1, fold_print_line);
|
|
|
|
update_rect->x = update_rect->y = 0;
|
|
update_rect->w = canvas->w;
|
|
update_rect->h = canvas->h;
|
|
}
|
|
|
|
void fold_drag(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * snapshot, int ox, int oy, int x, int y,
|
|
SDL_Rect * update_rect)
|
|
{
|
|
// Avoid division by zero when calculating the preview
|
|
x = clamp(2, x, canvas->w - 2);
|
|
y = clamp(2, y, canvas->h - 2);
|
|
fold_preview(api, which, canvas, snapshot, ox, oy, x, y, update_rect);
|
|
}
|
|
|
|
void fold_switchin(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
void fold_switchout(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
int fold_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return (MODE_PAINT_WITH_PREVIEW);
|
|
}
|
|
|
|
|
|
Uint8 fold_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
Uint8 fold_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void fold_set_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 size ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|