524 lines
17 KiB
C
524 lines
17 KiB
C
#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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#define SEG_NONE 0
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#define SEG_LEFT 1
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#define SEG_RIGHT 2
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#define SEG_TOP 4
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#define SEG_BOTTOM 8
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#define SEG_LEFT_RIGHT (SEG_LEFT | SEG_RIGHT)
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#define SEG_TOP_BOTTOM (SEG_TOP | SEG_BOTTOM)
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#define SEG_RIGHT_TOP (SEG_RIGHT | SEG_TOP)
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#define SEG_RIGHT_BOTTOM (SEG_RIGHT | SEG_BOTTOM)
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#define SEG_LEFT_TOP (SEG_LEFT | SEG_TOP)
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#define SEG_LEFT_BOTTOM (SEG_LEFT | SEG_BOTTOM)
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#define SEG_LEFT_RIGHT_TOP (SEG_LEFT | SEG_RIGHT | SEG_TOP)
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#define SEG_LEFT_RIGHT_BOTTOM (SEG_LEFT | SEG_RIGHT | SEG_BOTTOM)
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#define SEG_LEFT_TOP_BOTTOM (SEG_LEFT | SEG_TOP | SEG_BOTTOM)
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#define SEG_RIGHT_TOP_BOTTOM (SEG_RIGHT | SEG_TOP | SEG_BOTTOM)
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#define SEG_LEFT_RIGHT_TOP_BOTTOM (SEG_LEFT | SEG_RIGHT | SEG_TOP | SEG_BOTTOM)
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Mix_Chunk * rails_snd;
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unsigned int img_w, img_h;
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unsigned int rails_segments_x, rails_segments_y; //how many segments do we have?
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static int rails_math_ceil(int x, int y); //ceil() in cstdlib returns float and is relative slow, so we'll use our one
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static Uint8 * rails_status_of_segments; //a place to store an info about bitmap used for selected segment
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static char ** rails_images; //the pathes to all the images needed
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static unsigned int rails_segment_modified; //which segment was modified this time?
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static unsigned int rails_segment_modified_last =0; //which segment was last modified
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static unsigned int rails_segment_to_add =0; //a segment that should be added to solve corner joints
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static SDL_Rect modification_rect;
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static SDL_Surface * canvas_backup;
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// Housekeeping functions
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SDL_Surface * rails_one, * rails_three, * rails_four, * rails_corner;
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Uint32 rails_api_version(void);
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int rails_modes(magic_api * api, int which);
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void rails_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
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int rails_init(magic_api * api);
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int rails_get_tool_count(magic_api * api);
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SDL_Surface * rails_get_icon(magic_api * api, int which);
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char * rails_get_name(magic_api * api, int which);
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char * rails_get_description(magic_api * api, int which, int mode);
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int rails_requires_colors(magic_api * api, int which);
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void rails_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y, SDL_Rect * update_rect);
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void rails_shutdown(magic_api * api);
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void rails_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
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void rails_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
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static int rails_math_ceil(int x, int y);
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inline unsigned int rails_get_segment(int x, int y);
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inline void rails_extract_coords_from_segment(unsigned int segment, Sint16 * x, Sint16 * y);
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static void rails_flip(void * ptr, SDL_Surface * dest, SDL_Surface * src);
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static void rails_flip_flop(void * ptr, SDL_Surface * dest, SDL_Surface * src);
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static void rails_rotate (void * ptr, SDL_Surface * dest, SDL_Surface * src, unsigned int direction);
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void rails_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y, SDL_Rect * update_rect);
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static Uint8 rails_select_image(Uint16 segment);
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static void rails_draw(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
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int x, int y, unsigned int segment);
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static void rails_draw_wrapper(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
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int x, int y);
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void rails_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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Uint32 rails_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 rails_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return(MODE_PAINT);
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}
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void rails_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED)
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{
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}
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int rails_init(magic_api * api)
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{
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char fname[1024];
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Uint8 i; //is always < 3, so Uint8 seems to be a good idea
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rails_images=(char **)malloc(sizeof(char *)*4);
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for (i = 0; i < 4; i++)
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rails_images[i]=(char *)malloc(sizeof(char)*1024);
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snprintf(rails_images[0], 1024*sizeof(char), "%s/images/magic/rails_one.png", api->data_directory);
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snprintf(rails_images[1], 1024*sizeof(char), "%s/images/magic/rails_three.png", api->data_directory);
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snprintf(rails_images[2], 1024*sizeof(char), "%s/images/magic/rails_four.png", api->data_directory);
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snprintf(rails_images[3], 1024*sizeof(char), "%s/images/magic/rails_corner.png", api->data_directory);
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rails_one=IMG_Load(rails_images[0]);
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rails_three=IMG_Load(rails_images[1]);
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rails_four=IMG_Load(rails_images[2]);
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rails_corner=IMG_Load(rails_images[3]);
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img_w = rails_one->w;
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img_h = rails_one->h;
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snprintf(fname, sizeof(fname), "%s/sounds/magic/rails.wav", api->data_directory);
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rails_snd = Mix_LoadWAV(fname);
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return(1);
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}
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int rails_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 * rails_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), "%s/images/magic/rails.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 * rails_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED) { return strdup(gettext_noop("Rails")); }
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char * rails_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) { return strdup(gettext_noop("Click and drag to draw train track rails on your picture.")); }
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int rails_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED) { return 0;}
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void rails_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * snapshot ATTRIBUTE_UNUSED,
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int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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void rails_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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Uint8 i;
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if (rails_snd!=NULL)
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Mix_FreeChunk(rails_snd);
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SDL_FreeSurface(rails_one);
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SDL_FreeSurface(rails_three);
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SDL_FreeSurface(rails_four);
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SDL_FreeSurface(rails_corner);
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SDL_FreeSurface(canvas_backup);
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for (i = 0; i < 4; i++)
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free(rails_images[i]);
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free(rails_images);
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if (rails_status_of_segments != NULL)
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free(rails_status_of_segments);
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}
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void rails_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas)
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{
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//we've to compute the quantity of segments in each direction
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canvas_backup=SDL_CreateRGBSurface(SDL_SWSURFACE, canvas->w, canvas->h, canvas->format->BitsPerPixel,
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canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask, canvas->format->Amask);
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SDL_BlitSurface(canvas, NULL, canvas_backup, NULL);
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rails_segments_x=rails_math_ceil(canvas->w,img_w);
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rails_segments_y=rails_math_ceil(canvas->h,img_h);
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//status_of_segments[0] will not be used, we write in rails_status_of_segments[1 to segments_x*segments_y]
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rails_status_of_segments=(Uint8 *)calloc(rails_segments_x*rails_segments_y + 1, sizeof(Uint8));
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}
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void rails_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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if (rails_status_of_segments != NULL)
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{
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free(rails_status_of_segments);
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rails_status_of_segments = NULL;
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}
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}
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// Interactivity functions
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static int rails_math_ceil(int x, int y)
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{
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int temp;
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temp=(int)x/y;
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if (x%y)
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return temp+1;
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else return temp;
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}
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inline unsigned int rails_get_segment(int x, int y)
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{
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int xx; //segments are numerated just like pixels
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int yy; //in computer graphics: left upper (=1), ... ,right upper,
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//left bottom, ... , right bottom
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xx=rails_math_ceil(x, img_w);
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yy=rails_math_ceil(y, img_h);
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return (yy-1)*rails_segments_x+xx;
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}
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inline void rails_extract_coords_from_segment(unsigned int segment, Sint16 * x, Sint16 * y)
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{ //extracts the coords of the beginning and the segment
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*x=((segment%rails_segments_x)-1)*img_w; //useful to set update_rect as small as possible
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*y=(int)(segment/rails_segments_x)*img_h;
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}
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static void rails_flip(void * ptr, SDL_Surface * dest, SDL_Surface * src)
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{
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magic_api * api = (magic_api *) ptr;
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Sint16 x, y;
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for (x=0; x<dest->w; x++)
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for (y=0; y<dest->h; y++)
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api->putpixel(dest, x, y, api->getpixel(src, x, src->h-y-1));
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}
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static void rails_flip_flop(void * ptr, SDL_Surface * dest, SDL_Surface * src)
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{
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magic_api * api = (magic_api *) ptr;
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Sint16 x, y;
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for (x=0; x<dest->w; x++)
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for (y=0; y<dest->h; y++)
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api->putpixel(dest, x, y, api->getpixel(src, y, x));
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}
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static void rails_rotate (void * ptr, SDL_Surface * dest, SDL_Surface * src, unsigned int direction)
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//src and dest must have same size
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{
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magic_api * api = (magic_api *) ptr;
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Sint16 x,y;
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if (direction) //rotate -90 degs
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{
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for (x = 0; x<dest->w; x++)
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for (y =0; y<dest->h; y++)
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api->putpixel(dest, x, y, api->getpixel(src, y, src->w-x-1));
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}
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else //rotate +90 degs
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{
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for (x=0; x<dest->w; x++)
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for (y=0; y<dest->h; y++)
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api->putpixel(dest,x,y,api->getpixel(src,src->h-y-1,x));
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}
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}
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void rails_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y, SDL_Rect * update_rect)
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{
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rails_segment_modified_last = 0;
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rails_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
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}
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static Uint8 rails_select_image(Uint16 segment)
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{
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int take_up, take_down;
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int val_up, val_down, val_left, val_right;
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int from_top=0, from_bottom=0, from_left = 0, from_right = 0;
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int from_top_right=0, from_top_left=0, from_bottom_right=0, from_bottom_left = 0;
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int TOP=0, BOTTOM=0, LEFT=0, RIGHT = 0;
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//Checking from were we come...
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if (rails_segment_modified_last>0)
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{
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if (segment == rails_segment_modified_last + 1)
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from_left = 1;
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if (segment == rails_segment_modified_last - 1)
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from_right = 1;
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if (segment == rails_segment_modified_last - rails_segments_x)
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from_bottom = 1;
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if (segment == rails_segment_modified_last + rails_segments_x)
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from_top = 1;
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// Segments are joining by the corner
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// We need to add a new segment to join by side, adding clockwise
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if (segment == rails_segment_modified_last + rails_segments_x + 1)
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{
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from_top_left = 1;
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rails_segment_to_add = segment - rails_segments_x;
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}
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if (segment == rails_segment_modified_last + rails_segments_x - 1)
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{
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from_top_right = 1;
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rails_segment_to_add = segment + 1;
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}
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if (segment == rails_segment_modified_last - rails_segments_x - 1)
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{
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from_bottom_right = 1;
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rails_segment_to_add = segment + rails_segments_x;
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}
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if (segment == rails_segment_modified_last - rails_segments_x + 1)
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{
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from_bottom_left = 1;
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rails_segment_to_add = segment -1;
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}
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}
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take_up=segment-rails_segments_x;
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if (take_up<=0) val_up = SEG_NONE;
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else val_up = rails_status_of_segments[take_up];
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take_down=segment+rails_segments_x;
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if (take_down>(signed)(rails_segments_x*rails_segments_y)) val_down = SEG_NONE;
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else val_down = rails_status_of_segments[take_down];
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if ((segment%rails_segments_x)==1) val_left=SEG_NONE;
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else val_left = rails_status_of_segments[segment-1];
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if ((segment%rails_segments_x)==0) val_right=SEG_NONE;
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else val_right = rails_status_of_segments[segment+1];
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if ( from_left || (val_left & SEG_RIGHT) || from_bottom_left)
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{
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LEFT = 1;}
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if ( from_right || (val_right & SEG_LEFT) || from_top_right)
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RIGHT=1;
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if ( from_top || (val_up & SEG_BOTTOM) || from_top_left)
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TOP=1;
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if (from_bottom || (val_down & SEG_TOP) || from_bottom_right)
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BOTTOM=1;
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if (TOP && BOTTOM && LEFT && RIGHT)
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return SEG_LEFT_RIGHT_TOP_BOTTOM;
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if (LEFT && RIGHT && TOP)
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return SEG_LEFT_RIGHT_TOP;
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if (LEFT && RIGHT && BOTTOM)
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return SEG_LEFT_RIGHT_BOTTOM;
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if (TOP && BOTTOM && LEFT)
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return SEG_LEFT_TOP_BOTTOM;
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if (TOP && BOTTOM && RIGHT)
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return SEG_RIGHT_TOP_BOTTOM;
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if (LEFT &&RIGHT)
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return SEG_LEFT_RIGHT;
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if (TOP&&BOTTOM)
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return SEG_TOP_BOTTOM;
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if (LEFT&&TOP)
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return SEG_LEFT_TOP;
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if (LEFT&&BOTTOM)
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return SEG_LEFT_BOTTOM;
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if (RIGHT&&TOP)
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return SEG_RIGHT_TOP;
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if (RIGHT&&BOTTOM)
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return SEG_RIGHT_BOTTOM;
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if (LEFT|RIGHT)
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return SEG_LEFT_RIGHT;
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return SEG_TOP_BOTTOM;
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}
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static void rails_draw(void * ptr, int which ATTRIBUTE_UNUSED, ATTRIBUTE_UNUSED SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED,
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int x, int y ATTRIBUTE_UNUSED, unsigned int segment)
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{
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magic_api * api = (magic_api *) ptr;
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SDL_Surface * result, * temp;
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Uint8 image;
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unsigned int use_temp;
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use_temp=0;
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if (segment>rails_segments_x*rails_segments_y)
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return;
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//modification_rect.x and modification_rect.y are set by function
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rails_extract_coords_from_segment(segment, &modification_rect.x, &modification_rect.y);
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modification_rect.h=img_w;
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modification_rect.w=img_h;
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image=rails_select_image(segment); //select the image to display
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if (rails_status_of_segments[segment] == image)
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return;
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rails_status_of_segments[segment]=image; //and write it to global table
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result=SDL_CreateRGBSurface(SDL_SWSURFACE, img_w, img_h, rails_one->format->BitsPerPixel,
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rails_one->format->Rmask, rails_one->format->Gmask, rails_one->format->Bmask, rails_one->format->Amask);
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temp=SDL_CreateRGBSurface(SDL_SWSURFACE, img_w, img_h, rails_one->format->BitsPerPixel,
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rails_one->format->Rmask, rails_one->format->Gmask, rails_one->format->Bmask, rails_one->format->Amask);
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SDL_BlitSurface(canvas_backup, &modification_rect, result, NULL);
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switch(image)
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{
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case 0:
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case SEG_TOP_BOTTOM:
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SDL_BlitSurface(canvas_backup, &modification_rect, result, NULL);
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SDL_BlitSurface(rails_one, NULL, result, NULL);
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break;
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case SEG_LEFT_RIGHT:
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SDL_BlitSurface(canvas_backup, &modification_rect, result, NULL);
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rails_rotate(api, temp, rails_one, 1);
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use_temp=1;
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break;
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case SEG_LEFT_RIGHT_TOP_BOTTOM:
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SDL_BlitSurface(canvas_backup, &modification_rect, result, NULL);
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SDL_BlitSurface(rails_four, NULL, result, NULL);
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break;
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case SEG_LEFT_RIGHT_TOP:
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SDL_BlitSurface(rails_three, NULL, result, NULL);
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break;
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case SEG_LEFT_RIGHT_BOTTOM:
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rails_flip(api, temp, rails_three);
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use_temp=1;
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break;
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case SEG_LEFT_TOP_BOTTOM:
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rails_rotate(api, temp, rails_three, 0);
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use_temp=1;
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break;
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case SEG_RIGHT_TOP_BOTTOM:
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rails_rotate(api, temp, rails_three, 1);
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use_temp=1;
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break;
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case SEG_RIGHT_TOP:
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SDL_BlitSurface(rails_corner, NULL, result, NULL);
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break;
|
|
|
|
case SEG_RIGHT_BOTTOM:
|
|
rails_flip(api, temp, rails_corner);
|
|
use_temp=1;
|
|
break;
|
|
|
|
case SEG_LEFT_TOP:
|
|
rails_rotate(api, temp, rails_corner, 0);
|
|
use_temp=1;
|
|
break;
|
|
|
|
case SEG_LEFT_BOTTOM:
|
|
rails_flip_flop(api, temp, rails_corner);
|
|
use_temp=1;
|
|
break;
|
|
}
|
|
|
|
if (use_temp)
|
|
SDL_BlitSurface(temp, NULL, result, NULL);
|
|
|
|
SDL_FreeSurface(temp);
|
|
SDL_BlitSurface(result, NULL, canvas, &modification_rect);
|
|
SDL_FreeSurface(result);
|
|
api->playsound(rails_snd, (x * 255) / canvas->w, 255);
|
|
}
|
|
|
|
static void rails_draw_wrapper(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
|
|
int x, int y)
|
|
{
|
|
rails_segment_modified=rails_get_segment(x,y);
|
|
|
|
|
|
if ( (rails_segment_modified == rails_segment_modified_last))
|
|
return;
|
|
if (rails_segment_modified>0)
|
|
{
|
|
rails_draw((void *) ptr, which, canvas, last, x, y, rails_segment_modified);
|
|
}
|
|
if (rails_segment_modified_last>0)
|
|
rails_draw((void *) ptr, which, canvas, last, x, y, rails_segment_modified_last);
|
|
|
|
if (rails_segment_to_add>0)
|
|
{
|
|
rails_draw((void *) ptr, which, canvas, last, x, y, rails_segment_to_add);
|
|
rails_draw((void *) ptr, which, canvas, last, x, y, rails_segment_modified_last);
|
|
rails_segment_to_add=0;
|
|
}
|
|
if (rails_segment_modified>0)
|
|
rails_segment_modified_last=rails_segment_modified;
|
|
}
|
|
|
|
void rails_drag(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * snapshot, int ox, int oy, int x, int y,
|
|
SDL_Rect * update_rect)
|
|
{
|
|
int start_x, end_x, start_y, end_y, segment_start, segment_end, w, h;
|
|
// avoiding to write out of the canvas
|
|
if ((x<canvas->w)&&(y<canvas->h)&&(ox<canvas->w)&&(oy<canvas->h)&&((signed)x>0)&&((signed)y>0)&&((signed)ox>0)&&((signed)oy>0))
|
|
{
|
|
api->line((void *) api, which, canvas, snapshot, ox, oy, x, y, img_w/2, rails_draw_wrapper);
|
|
|
|
start_x=min(ox,x);
|
|
end_x=max(ox,x);
|
|
start_y=min(oy,y);
|
|
end_y=max(oy,y);
|
|
|
|
segment_start=rails_get_segment(start_x-img_w, start_y-img_h);
|
|
segment_end=rails_get_segment(end_x+img_w,end_y+img_h);
|
|
|
|
x=((segment_start%rails_segments_x)-1)*img_w;
|
|
y=(int)(segment_start/rails_segments_x)*img_h;
|
|
w=((segment_end%rails_segments_x)-1)*img_w-x+img_w;
|
|
h=(int)(segment_end/rails_segments_x)*img_h-y+img_h;
|
|
|
|
update_rect->x=x;
|
|
update_rect->y=y;
|
|
update_rect->w=w;
|
|
update_rect->h=h;}
|
|
|
|
}
|