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#include <isogfx/backend.h>
#include <isogfx/isogfx.h>
#include <gfx/app.h>
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
static const int WINDOW_WIDTH = 1408;
static const int WINDOW_HEIGHT = 960;
static const int MAX_FPS = 60;
// Virtual screen dimensions.
static const int SCREEN_WIDTH = 704;
static const int SCREEN_HEIGHT = 480;
static const int TILE_WIDTH = 64;
static const int TILE_HEIGHT = TILE_WIDTH / 2;
static const int WORLD_WIDTH = 20;
static const int WORLD_HEIGHT = 20;
static const TileDesc tile_set[] = {
{.type = TileFromColour,
.width = TILE_WIDTH,
.height = TILE_HEIGHT,
.colour = (Pixel){.r = 0x38, .g = 0x3b, .b = 0x46, .a = 0xff}},
{.type = TileFromColour,
.width = TILE_WIDTH,
.height = TILE_HEIGHT,
.colour = (Pixel){.r = 0xA5, .g = 0xb3, .b = 0xc0, .a = 0xff}},
{.type = TileFromColour,
.width = TILE_WIDTH,
.height = TILE_HEIGHT,
.colour = (Pixel){.r = 0xdc, .g = 0x76, .b = 0x84, .a = 0xff}},
};
typedef enum Colour {
Black,
White,
Red,
} Colour;
typedef struct GfxAppState {
IsoBackend* backend;
IsoGfx* iso;
Tile red;
int xpick;
int ypick;
} GfxAppState;
static void make_checkerboard(IsoGfx* iso, Tile black, Tile white) {
assert(iso);
for (int y = 0; y < isogfx_world_height(iso); ++y) {
for (int x = 0; x < isogfx_world_width(iso); ++x) {
const int odd_col = x & 1;
const int odd_row = y & 1;
const Tile value = (odd_row ^ odd_col) == 0 ? black : white;
isogfx_set_tile(iso, x, y, value);
}
}
}
static bool init(GfxAppState* state, int argc, const char** argv) {
assert(state);
(void)argc;
(void)argv;
if (!(state->iso = isogfx_new(&(IsoGfxDesc){
.screen_width = SCREEN_WIDTH, .screen_height = SCREEN_HEIGHT}))) {
return false;
}
IsoGfx* iso = state->iso;
isogfx_resize(iso, SCREEN_WIDTH, SCREEN_HEIGHT);
if (!isogfx_make_world(
iso, &(WorldDesc){
.tile_width = TILE_WIDTH,
.tile_height = TILE_HEIGHT,
.world_width = WORLD_WIDTH,
.world_height = WORLD_HEIGHT})) {
return false;
}
const Tile black = isogfx_make_tile(iso, &tile_set[Black]);
const Tile white = isogfx_make_tile(iso, &tile_set[White]);
state->red = isogfx_make_tile(iso, &tile_set[Red]);
make_checkerboard(iso, black, white);
if (!(state->backend = IsoBackendInit(iso))) {
return false;
}
return true;
}
static void shutdown(GfxAppState* state) {
assert(state);
IsoBackendShutdown(&state->backend);
isogfx_del(&state->iso);
}
static void update(GfxAppState* state, double t, double dt) {
assert(state);
(void)dt;
IsoGfx* iso = state->iso;
isogfx_update(iso, t);
// Get mouse position in window coordinates.
double mouse_x, mouse_y;
gfx_app_get_mouse_position(&mouse_x, &mouse_y);
// Map from window coordinates to virtual screen coordinates.
IsoBackendGetMousePosition(
state->backend, mouse_x, mouse_y, &mouse_x, &mouse_y);
isogfx_pick_tile(iso, mouse_x, mouse_y, &state->xpick, &state->ypick);
printf("Picked tile: (%d, %d)\n", state->xpick, state->ypick);
}
static void render(GfxAppState* state) {
assert(state);
IsoGfx* iso = state->iso;
isogfx_render(iso);
if ((state->xpick != -1) && (state->ypick != -1)) {
isogfx_draw_tile(iso, state->xpick, state->ypick, state->red);
}
IsoBackendRender(state->backend, iso);
}
static void resize(GfxAppState* state, int width, int height) {
assert(state);
IsoBackendResizeWindow(state->backend, state->iso, width, height);
}
int main(int argc, const char** argv) {
GfxAppState state = {0};
gfx_app_run(
&(GfxAppDesc){
.argc = argc,
.argv = argv,
.width = WINDOW_WIDTH,
.height = WINDOW_HEIGHT,
.max_fps = MAX_FPS,
.update_delta_time = MAX_FPS > 0 ? 1.0 / (double)MAX_FPS : 0.0,
.title = "Isometric Renderer",
.app_state = &state},
&(GfxAppCallbacks){
.init = init,
.update = update,
.render = render,
.resize = resize,
.shutdown = shutdown});
return 0;
}
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