6 files changed, 401 insertions, 0 deletions

diff --git a/gfx-iso/app/app.h b/gfx-iso/app/app.h
new file mode 100644
index 0000000..160da47
--- /dev/null
+++ b/gfx-iso/app/app.h
@@ -0,0 +1,11 @@
+#pragma once
+
+typedef struct IsoGfx    IsoGfx;
+typedef struct IsoGfxApp IsoGfxApp;
+
+typedef struct IsoGfxApp {
+  void* state;
+  void (*shutdown)(IsoGfx*, void* state);
+  void (*update)(IsoGfx*, void* state, double t, double dt);
+  void (*render)(IsoGfx*, void* state);
+} IsoGfxApp;
diff --git a/gfx-iso/app/checkerboard.c b/gfx-iso/app/checkerboard.c
new file mode 100644
index 0000000..8b394c4
--- /dev/null
+++ b/gfx-iso/app/checkerboard.c
@@ -0,0 +1,120 @@
+#include "isogfx-demo.h"
+
+#include <gfx/gfx_app.h>
+#include <isogfx/isogfx.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+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 State {
+  Tile red;
+  int  xpick;
+  int  ypick;
+} State;
+
+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 void shutdown(IsoGfx* iso, void* app_state) {
+  assert(iso);
+  if (app_state) {
+    free(app_state);
+  }
+}
+
+static void update(IsoGfx* iso, void* app_state, double t, double dt) {
+  assert(iso);
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  double mouse_x, mouse_y;
+  gfx_app_get_mouse_position(&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(IsoGfx* iso, void* app_state) {
+  assert(iso);
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  isogfx_render(iso);
+  if ((state->xpick != -1) && (state->ypick != -1)) {
+    isogfx_draw_tile(iso, state->xpick, state->ypick, state->red);
+  }
+}
+
+bool make_checkerboard_app(IsoGfx* iso, IsoGfxApp* app) {
+  assert(iso);
+  assert(app);
+
+  State* state = calloc(1, sizeof(State));
+  if (!state) {
+    return false;
+  }
+
+  if (!isogfx_make_world(
+          iso, &(WorldDesc){
+                   .tile_width   = TILE_WIDTH,
+                   .tile_height  = TILE_HEIGHT,
+                   .world_width  = WORLD_WIDTH,
+                   .world_height = WORLD_HEIGHT})) {
+    goto cleanup;
+  }
+
+  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);
+  isogfx_render(iso);
+
+  app->state    = state;
+  app->shutdown = shutdown;
+  app->update   = update;
+  app->render   = render;
+
+  return true;
+
+cleanup:
+  free(state);
+  return false;
+}
diff --git a/gfx-iso/app/checkerboard.h b/gfx-iso/app/checkerboard.h
new file mode 100644
index 0000000..61725a5
--- /dev/null
+++ b/gfx-iso/app/checkerboard.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "app.h"
+
+#include <stdbool.h>
+
+typedef struct IsoGfxApp IsoGfxApp;
+
+bool make_checkerboard_app(IsoGfx*, IsoGfxApp*);
diff --git a/gfx-iso/app/isogfx-demo.c b/gfx-iso/app/isogfx-demo.c
new file mode 100644
index 0000000..15ab6be
--- /dev/null
+++ b/gfx-iso/app/isogfx-demo.c
@@ -0,0 +1,67 @@
+#include "isogfx-demo.h"
+
+#include <gfx/gfx_app.h>
+#include <isogfx/isogfx.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct State {
+  int xpick;
+  int ypick;
+} State;
+
+static void shutdown(IsoGfx* iso, void* app_state) {
+  assert(iso);
+  if (app_state) {
+    free(app_state);
+  }
+}
+
+static void update(IsoGfx* iso, void* app_state, double t, double dt) {
+  assert(iso);
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  double mouse_x, mouse_y;
+  gfx_app_get_mouse_position(&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(IsoGfx* iso, void* app_state) {
+  assert(iso);
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  isogfx_render(iso);
+}
+
+bool make_demo_app(IsoGfx* iso, IsoGfxApp* app) {
+  assert(iso);
+  assert(app);
+
+  State* state = calloc(1, sizeof(State));
+  if (!state) {
+    return false;
+  }
+
+  if (!isogfx_load_world(iso, "/home/jeanne/assets/tilemaps/demo1.tm")) {
+    goto cleanup;
+  }
+
+  app->state    = state;
+  app->shutdown = shutdown;
+  app->update   = update;
+  app->render   = render;
+
+  return true;
+
+cleanup:
+  free(state);
+  return false;
+}
diff --git a/gfx-iso/app/isogfx-demo.h b/gfx-iso/app/isogfx-demo.h
new file mode 100644
index 0000000..d099824
--- /dev/null
+++ b/gfx-iso/app/isogfx-demo.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "app.h"
+
+#include <stdbool.h>
+
+typedef struct IsoGfxApp IsoGfxApp;
+
+bool make_demo_app(IsoGfx*, IsoGfxApp*);
diff --git a/gfx-iso/app/main.c b/gfx-iso/app/main.c
new file mode 100644
index 0000000..fa5a76b
--- /dev/null
+++ b/gfx-iso/app/main.c
@@ -0,0 +1,185 @@
+#include "app.h"
+#include "checkerboard.h"
+#include "isogfx-demo.h"
+
+#include <isogfx/isogfx.h>
+
+#include <gfx/gfx.h>
+#include <gfx/gfx_app.h>
+#include <gfx/render_backend.h>
+#include <gfx/renderer.h>
+#include <gfx/scene.h>
+#include <gfx/util/geometry.h>
+#include <gfx/util/shader.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+static const int SCREEN_WIDTH  = 1408;
+static const int SCREEN_HEIGHT = 960;
+
+typedef struct State {
+  Gfx*      gfx;
+  IsoGfx*   iso;
+  IsoGfxApp app;
+  Texture*  screen_texture;
+  Scene*    scene;
+} State;
+
+static bool init(const GfxAppDesc* desc, void** app_state) {
+  State* state = calloc(1, sizeof(State));
+  if (!state) {
+    return false;
+  }
+
+  if (!(state->iso = isogfx_new(&(IsoGfxDesc){
+            .screen_width = SCREEN_WIDTH, .screen_height = SCREEN_HEIGHT}))) {
+    goto cleanup;
+  }
+  //  if (!make_checkerboard_app(state->iso, &state->app)) {
+  //    goto cleanup;
+  //  }
+  if (!make_demo_app(state->iso, &state->app)) {
+    goto cleanup;
+  }
+  if (!(state->gfx = gfx_init())) {
+    goto cleanup;
+  }
+  RenderBackend* render_backend = gfx_get_render_backend(state->gfx);
+
+  if (!(state->screen_texture = gfx_make_texture(
+            render_backend, &(TextureDesc){
+                                .width     = SCREEN_WIDTH,
+                                .height    = SCREEN_HEIGHT,
+                                .dimension = Texture2D,
+                                .format    = TextureSRGBA8,
+                                .filtering = NearestFiltering,
+                                .wrap      = ClampToEdge,
+                                .mipmaps   = false}))) {
+    goto cleanup;
+  }
+
+  ShaderProgram* shader = gfx_make_view_texture_shader(render_backend);
+  if (!shader) {
+    goto cleanup;
+  }
+
+  Geometry* geometry = gfx_make_quad_11(render_backend);
+  if (!geometry) {
+    goto cleanup;
+  }
+
+  MaterialDesc material_desc = (MaterialDesc){.num_uniforms = 1};
+  material_desc.uniforms[0]  = (ShaderUniform){
+       .type          = UniformTexture,
+       .value.texture = state->screen_texture,
+       .name          = sstring_make("Texture")};
+  Material* material = gfx_make_material(&material_desc);
+  if (!material) {
+    return false;
+  }
+
+  const MeshDesc mesh_desc =
+      (MeshDesc){.geometry = geometry, .material = material, .shader = shader};
+  Mesh* mesh = gfx_make_mesh(&mesh_desc);
+  if (!mesh) {
+    goto cleanup;
+  }
+
+  SceneObject* object = gfx_make_object();
+  if (!object) {
+    goto cleanup;
+  }
+  gfx_add_object_mesh(object, mesh);
+
+  state->scene    = gfx_make_scene();
+  SceneNode* node = gfx_make_object_node(object);
+  SceneNode* root = gfx_get_scene_root(state->scene);
+  gfx_set_node_parent(node, root);
+
+  *app_state = state;
+  return true;
+
+cleanup:
+  if (state->gfx) {
+    gfx_destroy(&state->gfx);
+  }
+  free(state);
+  return false;
+}
+
+static void shutdown(void* app_state) {
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  if (state->app.state) {
+    assert(state->iso);
+    (*state->app.shutdown)(state->iso, state->app.state);
+  }
+  isogfx_del(&state->iso);
+  gfx_destroy(&state->gfx);
+  free(app_state);
+}
+
+static void update(void* app_state, double t, double dt) {
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  assert(state->app.update);
+  (*state->app.update)(state->iso, state->app.state, t, dt);
+}
+
+static void render(void* app_state) {
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  assert(state->app.render);
+  (*state->app.render)(state->iso, state->app.state);
+
+  const Pixel* screen = isogfx_get_screen_buffer(state->iso);
+  assert(screen);
+  gfx_update_texture(
+      state->screen_texture, &(TextureDataDesc){.pixels = screen});
+
+  RenderBackend* render_backend = gfx_get_render_backend(state->gfx);
+  Renderer*      renderer       = gfx_get_renderer(state->gfx);
+
+  gfx_start_frame(render_backend);
+  gfx_render_scene(
+      renderer, &(RenderSceneParams){
+                    .mode = RenderDefault, .scene = state->scene, .camera = 0});
+  gfx_end_frame(render_backend);
+}
+
+static void resize(void* app_state, int width, int height) {
+  assert(app_state);
+  State* state = (State*)(app_state);
+
+  RenderBackend* render_backend = gfx_get_render_backend(state->gfx);
+  gfx_set_viewport(render_backend, width, height);
+}
+
+int main(int argc, const char** argv) {
+  const int initial_width  = SCREEN_WIDTH;
+  const int initial_height = SCREEN_HEIGHT;
+  const int max_fps        = 60;
+
+  gfx_app_run(
+      &(GfxAppDesc){
+          .argc              = argc,
+          .argv              = argv,
+          .width             = initial_width,
+          .height            = initial_height,
+          .max_fps           = max_fps,
+          .update_delta_time = max_fps > 0 ? 1.0 / (double)max_fps : 0.0,
+          .title             = "Isometric Renderer"},
+      &(GfxAppCallbacks){
+          .init     = init,
+          .update   = update,
+          .render   = render,
+          .resize   = resize,
+          .shutdown = shutdown});
+
+  return 0;
+}