From adbd2511beec8f1caa1752bdfd755cc2f62ba425 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 9 Mar 2024 08:43:26 -0800
Subject: Make isogfx a library instead of an executable.
---
gfx-iso/src/app.c | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 198 insertions(+)
create mode 100644 gfx-iso/src/app.c
(limited to 'gfx-iso/src/app.c')
diff --git a/gfx-iso/src/app.c b/gfx-iso/src/app.c
new file mode 100644
index 0000000..079ac96
--- /dev/null
+++ b/gfx-iso/src/app.c
@@ -0,0 +1,198 @@
+#include <isogfx/app.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;
+static const int MAX_FPS = 60;
+
+typedef struct AppState {
+ Gfx* gfx;
+ IsoGfx* iso;
+ IsoGfxApp* app;
+ Texture* screen_texture;
+ Scene* scene;
+} AppState;
+
+typedef struct GfxAppState {
+ AppState state;
+} GfxAppState;
+
+static bool init(GfxAppState* gfx_app_state, int argc, const char** argv) {
+ assert(gfx_app_state);
+ AppState* state = &gfx_app_state->state;
+
+ IsoGfxApp* app = state->app;
+
+ if (!(state->iso = isogfx_new(&(IsoGfxDesc){
+ .screen_width = SCREEN_WIDTH, .screen_height = SCREEN_HEIGHT}))) {
+ goto cleanup;
+ }
+
+ if (!(*app->init)(app->state, state->iso, argc, argv)) {
+ goto cleanup;
+ }
+
+ // Apply pixel scaling if requested by the app.
+ int texture_width, texture_height;
+ if (app->pixel_scale > 1) {
+ texture_width = SCREEN_WIDTH / app->pixel_scale;
+ texture_height = SCREEN_HEIGHT / app->pixel_scale;
+ isogfx_resize(state->iso, texture_width, texture_height);
+ } else {
+ texture_width = SCREEN_WIDTH;
+ texture_height = SCREEN_HEIGHT;
+ }
+
+ 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 = texture_width,
+ .height = texture_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(&(ObjectDesc){.num_meshes = 1, .meshes = {mesh}});
+ if (!object) {
+ goto cleanup;
+ }
+
+ 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);
+
+ return true;
+
+cleanup:
+ if (state->gfx) {
+ gfx_destroy(&state->gfx);
+ }
+ free(state);
+ return false;
+}
+
+static void shutdown(GfxAppState* gfx_app_state) {
+ assert(gfx_app_state);
+ AppState* state = &gfx_app_state->state;
+
+ if (state->app) {
+ assert(state->iso);
+ (*state->app->shutdown)(state->app->state, state->iso);
+ }
+
+ isogfx_del(&state->iso);
+ gfx_destroy(&state->gfx);
+}
+
+static void update(GfxAppState* gfx_app_state, double t, double dt) {
+ assert(gfx_app_state);
+ AppState* state = &gfx_app_state->state;
+
+ isogfx_update(state->iso, t);
+
+ assert(state->app->update);
+ (*state->app->update)(state->app->state, state->iso, t, dt);
+}
+
+static void render(GfxAppState* gfx_app_state) {
+ assert(gfx_app_state);
+ AppState* state = &gfx_app_state->state;
+
+ assert(state->app->render);
+ (*state->app->render)(state->app->state, state->iso);
+
+ 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(GfxAppState* gfx_app_state, int width, int height) {
+ assert(gfx_app_state);
+ AppState* state = &gfx_app_state->state;
+
+ RenderBackend* render_backend = gfx_get_render_backend(state->gfx);
+ gfx_set_viewport(render_backend, width, height);
+}
+
+void iso_run(int argc, const char** argv, IsoGfxApp* app) {
+ GfxAppState app_state = {
+ .state = (AppState){
+ .app = app,
+ }
+ };
+ gfx_app_run(
+ &(GfxAppDesc){
+ .argc = argc,
+ .argv = argv,
+ .width = SCREEN_WIDTH,
+ .height = SCREEN_HEIGHT,
+ .max_fps = MAX_FPS,
+ .update_delta_time = MAX_FPS > 0 ? 1.0 / (double)MAX_FPS : 0.0,
+ .title = "Isometric Renderer",
+ .app_state = &app_state},
+ &(GfxAppCallbacks){
+ .init = init,
+ .update = update,
+ .render = render,
+ .resize = resize,
+ .shutdown = shutdown});
+}
--
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