Add render module

2025-05-31 13:26:21 +02:00
parent e2a2d6efdf
commit d019c761bf
4 changed files with 84 additions and 57 deletions
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -0,0 +1,73 @@
+#include "render.hpp"
+
+#include "definitions.hpp"
+#include "physics.hpp"
+#include "sprite.hpp"
+
+#include <format>
+
+RenderModule::RenderModule(flecs::world& world)
+{
+    world.system<SdlHandles>("RenderClear")
+        .term_at(0)
+        .singleton()
+        .kind(flecs::PreStore)
+        .each([](SdlHandles& sdl_handles) { SDL_RenderClear(sdl_handles.renderer); });
+
+    flecs::entity render_present_phase =
+        world.entity().add(flecs::Phase).depends_on(flecs::OnStore);
+
+    world.system<SdlHandles>("RenderPresent")
+        .term_at(0)
+        .singleton()
+        .kind(render_present_phase)
+        .each([](SdlHandles& sdl_handles) { SDL_RenderPresent(sdl_handles.renderer); });
+
+    world.system<SdlHandles const, Position const, Size const, Sprite const>("RenderSprites")
+        .kind(flecs::OnStore)
+        .term_at(0)
+        .singleton()
+        .each(
+            [](SdlHandles const& sdl_handles,
+               Position const& pos,
+               Size const& size,
+               Sprite const& sprite)
+            {
+                TextureAtlasLayout layout = sprite.texture->texture_atlas_layout;
+                uint8_t row = sprite.texture_atlas_index / layout.columns;
+                uint8_t column = sprite.texture_atlas_index % layout.columns;
+                SDL_FRect srcrect{static_cast<float>(column * layout.width),
+                                  static_cast<float>(row * layout.height),
+                                  static_cast<float>(layout.width),
+                                  static_cast<float>(layout.height)};
+
+                SDL_FRect dstrect{static_cast<float>(pos.x),
+                                  static_cast<float>(pos.y),
+                                  static_cast<float>(size.w),
+                                  static_cast<float>(size.h)};
+
+                SDL_RenderTexture(
+                    sdl_handles.renderer, sprite.texture->sdl_texture, &srcrect, &dstrect);
+            });
+
+    world.system<SdlHandles const, Game const, FontAssets const>("RenderScore")
+        .kind(flecs::OnStore)
+        .term_at(0)
+        .singleton()
+        .term_at(1)
+        .singleton()
+        .term_at(2)
+        .singleton()
+        .each(
+            [](SdlHandles const& sdl_handles, Game const& game, FontAssets const& font_assets)
+            {
+                auto score_string = std::format("Score: {}\nTime: {}", game.score, game.time);
+                auto text = TTF_CreateText(sdl_handles.text_engine,
+                                           font_assets.default_font.font,
+                                           score_string.c_str(),
+                                           score_string.length());
+                TTF_DrawRendererText(text, 0.0, 0.0);
+
+                TTF_DestroyText(text);
+            });
+}