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testbed: bare minimum rendering system

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This commit is contained in:
skypjack
2025-04-30 16:24:01 +02:00
parent f5bbc895b5
commit 340888e4e2
1 changed files with 18 additions and 3 deletions
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21
testbed/system/rendering_system.cpp
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@@ -1,13 +1,28 @@
#include <SDL3/SDL_render.h>
#include <application/context.h>
#include <component/position_component.h>
#include <component/rect_component.h>
#include <component/renderable_component.h>
#include <entt/entity/registry.hpp>
#include <system/rendering_system.h>
namespace testbed {
void rendering_system(entt::registry &registry, const context &ctx) {
// render...
static_cast<void>(registry);
static_cast<void>(ctx);
constexpr int logical_width = 1920;
constexpr int logical_height = 1080;
SDL_SetRenderLogicalPresentation(ctx, logical_width, logical_height, SDL_LOGICAL_PRESENTATION_LETTERBOX);
SDL_SetRenderDrawColor(ctx, 0u, 0u, 0u, SDL_ALPHA_OPAQUE);
SDL_RenderClear(ctx);
for(auto [entt, pos, rect]: registry.view<renderable_component, position_component, rect_component>().each()) {
SDL_FRect elem{rect.area.x + pos.point.x, rect.area.y + pos.point.y, rect.area.w, rect.area.h};
SDL_SetRenderDrawColor(ctx, 255u, 255u, 255u, SDL_ALPHA_OPAQUE);
SDL_RenderRect(ctx, &elem);
}
SDL_SetRenderLogicalPresentation(ctx, 0, 0, SDL_LOGICAL_PRESENTATION_DISABLED);
}
} // namespace testbed