src/game/level/level_editor/layer_picker.c

   1 #include <stdbool.h>
   2 #include <string.h>
   3
   4 #include <SDL.h>
   5
   6 #include "system/stacktrace.h"
   7 #include "layer_picker.h"
   8 #include "color.h"
   9 #include "game/camera.h"
  10 #include "math/rect.h"
  11 #include "math/extrema.h"
  12 #include "game/sprite_font.h"
  13
  14 #define LAYER_TITLE_PADDING 15.0f
  15 #define LAYER_TITLE_SIZE 3.0f
  16 #define LAYER_SELECTED_OFFSET 15.0f
  17
  18 static const Color LAYER_CELL_BACKGROUND_COLORS[LAYER_PICKER_N] = {
  19     {1.0f, 0.0f, 0.0f, 1.0f}, // LAYER_PICKER_BACKGROUND
  20     {0.0f, 1.0f, 0.0f, 1.0f}, // LAYER_PICKER_PLAYER
  21     {0.6f, 0.6f, 1.0f, 1.0f}, // LAYER_PICKER_BACK_PLATFORMS
  22     {0.0f, 0.0f, 1.0f, 1.0f}, // LAYER_PICKER_PLATFORMS
  23     {1.0f, 1.0f, 1.0f, 1.0f}, // LAYER_PICKER_GOALS
  24     {1.0f, 0.2f, 0.6f, 1.0f}, // LAYER_PICKER_LAVA
  25     {0.2f, 1.0f, 0.6f, 1.0f}, // LAYER_PICKER_BOXES
  26     {0.2f, 0.6f, 1.0f, 1.0f}, // LAYER_PICKER_LABELS
  27     {0.2f, 1.0f, 0.6f, 1.0f}, // LAYER_PICKER_REGIONS
  28 };
  29
  30 static const char *LAYER_CELL_TITLES[LAYER_PICKER_N] = {
  31     "Background",              // LAYER_PICKER_BACKGROUND
  32     "Player",                  // LAYER_PICKER_PLAYER
  33     "Back Platforms",          // LAYER_PICKER_BACK_PLATFORMS
  34     "Platforms",               // LAYER_PICKER_PLATFORMS
  35     "Goals",                   // LAYER_PICKER_GOALS
  36     "Lava",                    // LAYER_PICKER_LAVA
  37     "Boxes",                   // LAYER_PICKER_BOXES
  38     "Labels",                  // LAYER_PICKER_LABELS
  39     "Regions",                 // LAYER_PICKER_REGIONS
  40 };
  41
  42 inline static float layer_picker_max_width(void)
  43 {
  44     size_t max = 0;
  45
  46     for (size_t i = 0; i < LAYER_PICKER_N; ++i) {
  47         max = max_size_t(max, strlen(LAYER_CELL_TITLES[i]));
  48     }
  49
  50     return (float) max * FONT_CHAR_WIDTH * LAYER_TITLE_SIZE + LAYER_TITLE_PADDING * 2.0f;
  51 }
  52
  53 #define LAYER_CELL_WIDTH layer_picker_max_width()
  54 #define LAYER_CELL_HEIGHT (LAYER_TITLE_SIZE * FONT_CHAR_HEIGHT + LAYER_TITLE_PADDING * 2.0f)
  55 #define LAYER_CELL_REFERENCE 1980.0f
  56 #define LAYER_CELL_WR_RATIO (LAYER_CELL_WIDTH / LAYER_CELL_REFERENCE)
  57 #define LAYER_CELL_HW_RATIO (LAYER_CELL_HEIGHT / LAYER_CELL_WIDTH)
  58 #define LAYER_TITLE_SW_RATIO (LAYER_TITLE_SIZE / LAYER_CELL_WIDTH)
  59 #define LAYER_TITLE_PW_RATIO (LAYER_TITLE_PADDING / LAYER_CELL_WIDTH)
  60 #define LAYER_CELL_OW_RATIO (LAYER_SELECTED_OFFSET / LAYER_CELL_WIDTH)
  61
  62 int layer_picker_render(const LayerPicker *layer_picker,
  63                         const Camera *camera)
  64 {
  65     trace_assert(layer_picker);
  66     trace_assert(camera);
  67
  68     const Rect viewport = camera_view_port_screen(camera);
  69
  70     for (size_t i = 0; i < LAYER_PICKER_N; ++i) {
  71         const Vec2f size = {
  72             .x = viewport.w * LAYER_CELL_WR_RATIO,
  73             .y = viewport.w * LAYER_CELL_WR_RATIO * LAYER_CELL_HW_RATIO
  74         };
  75
  76         Vec2f position = {
  77             .x = 0.0f,
  78             .y = viewport.h * 0.5f - size.y * LAYER_PICKER_N * 0.5f
  79         };
  80
  81         Color color = LAYER_CELL_BACKGROUND_COLORS[i];
  82
  83         if (*layer_picker == i) {
  84             position.x += size.x * LAYER_CELL_OW_RATIO;
  85         } else {
  86             color.a *= 0.70f;
  87         }
  88
  89         if (camera_fill_rect_screen(
  90                 camera,
  91                 rect(
  92                     position.x,
  93                     size.y * (float) i + position.y,
  94                     size.x, size.y),
  95                 color) < 0) {
  96             return -1;
  97         }
  98
  99         camera_render_text_screen(
 100             camera,
 101             LAYER_CELL_TITLES[i],
 102             vec(size.x * LAYER_TITLE_SW_RATIO,
 103                 size.x * LAYER_TITLE_SW_RATIO),
 104             color_invert(color),
 105             vec(position.x + size.x * LAYER_TITLE_PW_RATIO,
 106                 size.y * (float) i + position.y + size.x * LAYER_TITLE_PW_RATIO));
 107     }
 108
 109     return 0;
 110 }
 111
 112 int layer_picker_event(LayerPicker *layer_picker,
 113                        const SDL_Event *event,
 114                        const Camera *camera,
 115                        bool *selected)
 116 {
 117     trace_assert(layer_picker);
 118     trace_assert(event);
 119     trace_assert(camera);
 120
 121     const Rect viewport = camera_view_port_screen(camera);
 122
 123     const Vec2f size = {
 124         .x = viewport.w * LAYER_CELL_WR_RATIO,
 125         .y = viewport.w * LAYER_CELL_WR_RATIO * LAYER_CELL_HW_RATIO
 126     };
 127
 128     const Vec2f position = {
 129         .x = 0.0f,
 130         .y = viewport.h * 0.5f - size.y * LAYER_PICKER_N * 0.5f
 131     };
 132
 133     switch (event->type) {
 134     case SDL_MOUSEBUTTONDOWN: {
 135         for (LayerPicker i = 0; i < LAYER_PICKER_N; ++i) {
 136             const Rect cell = rect(
 137                 position.x,
 138                 size.y * (float) i + position.y,
 139                 size.x, size.y);
 140             if (rect_contains_point(cell, vec((float) event->button.x, (float) event->button.y))) {
 141                 *layer_picker = i;
 142                 *selected = true;
 143                 return 0;
 144             }
 145         }
 146     } break;
 147     }
 148
 149     return 0;
 150 }