summaryrefslogtreecommitdiff
path: root/lib/hitomezashi.c
diff options
context:
space:
mode:
authorArjun Satarkar <me@arjunsatarkar.net>2023-06-01 13:31:24 +0000
committerArjun Satarkar <me@arjunsatarkar.net>2023-06-01 13:33:56 +0000
commit3a2fef94230f35d948634ffef83660afdffa0bad (patch)
treee4fb261e6fcf6d0b4b3d4b688aa94757700f45ab /lib/hitomezashi.c
parent316382d74ed4a705c43e2380e7af20a500c24fa9 (diff)
downloadhitomezashi-3a2fef94230f35d948634ffef83660afdffa0bad.tar
hitomezashi-3a2fef94230f35d948634ffef83660afdffa0bad.tar.gz
hitomezashi-3a2fef94230f35d948634ffef83660afdffa0bad.zip
Complete libhitomezashi, reset project
Diffstat (limited to 'lib/hitomezashi.c')
-rw-r--r--lib/hitomezashi.c83
1 files changed, 0 insertions, 83 deletions
diff --git a/lib/hitomezashi.c b/lib/hitomezashi.c
deleted file mode 100644
index 5a3002d..0000000
--- a/lib/hitomezashi.c
+++ /dev/null
@@ -1,83 +0,0 @@
-#include "hitomezashi.h"
-#include "SDL2/SDL.h"
-#include <assert.h>
-
-SDL_Color HITOMEZASHI_FG_COLOUR = {.r = 0, .g = 0, .b = 0};
-SDL_Color HITOMEZASHI_BG_COLOUR = {.r = 255, .g = 255, .b = 255};
-
-enum Hitomezashi_State_Init_Result
-hitomezashi_state_init(struct Hitomezashi_State *state, int x_pattern_len,
- int y_pattern_len, const char *x_pattern,
- const char *y_pattern, int gap, int line_thickness,
- Uint32 fg_colour, Uint32 bg_colour) {
- assert(x_pattern_len >= 0);
- assert(y_pattern_len >= 0);
- assert(gap >= 0);
- assert(line_thickness > 0);
-
- state->y_pattern_len = y_pattern_len;
- state->x_pattern_len = x_pattern_len;
- state->x_pattern = x_pattern;
- state->y_pattern = y_pattern;
- state->gap = gap;
- state->line_thickness = line_thickness;
- state->output_width = x_pattern_len * gap;
- state->output_height = y_pattern_len * gap;
- state->fg_colour = fg_colour;
- state->bg_colour = bg_colour;
-
- state->surface = SDL_CreateRGBSurface(0, state->output_width,
- state->output_height, 32, 0, 0, 0, 0);
- if (!state->surface) {
- return Hitomezashi_State_Init_Result_Err_Create_Surface;
- }
- return Hitomezashi_State_Init_Result_Success;
-}
-
-enum Hitomezashi_Draw_Result hitomezashi_draw(struct Hitomezashi_State *state) {
- if (SDL_LockSurface(state->surface) != 0) {
- return Hitomezashi_Draw_Result_Err_Lock_Surface;
- }
-
- SDL_FillRect(state->surface, NULL, state->bg_colour);
-
- SDL_Rect rect;
- // Draw y pattern (horizontal) lines
- for (int i = 0; i < state->y_pattern_len; ++i) {
- for (int j = 0; j < state->x_pattern_len; ++j) {
- if (j % 2 == state->y_pattern[i]) {
- rect.x = j * state->gap;
- rect.y = i * state->gap;
- rect.w = state->gap;
- rect.h = state->line_thickness;
- SDL_FillRect(state->surface, &rect, state->fg_colour);
- }
- }
- }
- // Draw x pattern (vertical) lines
- for (int i = 0; i < state->x_pattern_len; ++i) {
- for (int j = 0; j < state->y_pattern_len; ++j) {
- if (j % 2 == state->x_pattern[i]) {
- rect.x = i * state->gap;
- rect.y = j * state->gap;
- rect.w = state->line_thickness;
- rect.h = state->gap;
- SDL_FillRect(state->surface, &rect, state->fg_colour);
- }
- }
- }
- // Join up the lines to avoid leaving holes at the intersections
- // To understand how this works, try commenting it out and see the output
- for (int x = state->gap; x < state->output_width; x += state->gap) {
- for (int y = state->gap; y < state->output_height; y += state->gap) {
- rect.x = x;
- rect.y = y;
- rect.w = state->line_thickness;
- rect.h = state->line_thickness;
- SDL_FillRect(state->surface, &rect, state->fg_colour);
- }
- }
-
- SDL_UnlockSurface(state->surface);
- return Hitomezashi_Draw_Result_Success;
-}