修复渲染问题

src/main.cpp

@@ -1,8 +1,5 @@
-//
-// Created by 46944 on 25-5-21.
-//
-
 #include <thread>
+#include <chrono>
 
 #include "SDL3/SDL_init.h"
 #include "SDL3/SDL_render.h"
@@ -12,58 +9,88 @@
 #include "SDL3_ttf/SDL_ttf.h"
 
 int main(int argc, char* argv[]) {
-	SDL_Init(SDL_INIT_VIDEO);
-	SDL_Window* window = SDL_CreateWindow("Hello World", 640, 480, 0);
-	if (window == nullptr) {
-		SDL_Log("Could not create window: %s", SDL_GetError());
-		return 1;
-	}
-	SDL_Renderer* renderer = SDL_CreateRenderer(window, "direct3d11");
-	if (renderer == nullptr) {
-		SDL_Log("Could not create renderer: %s", SDL_GetError());
-		SDL_DestroyWindow(window);
-		return 1;
-	}
-	TTF_Init();
-	auto text_engine = TTF_CreateRendererTextEngine(renderer);
-	if (text_engine == nullptr) {
-		SDL_Log("Could not create text engine: %s", SDL_GetError());
-		SDL_DestroyRenderer(renderer);
-		SDL_DestroyWindow(window);
-		return 1;
-	}
-	TTF_Font* font = TTF_OpenFont("C:/Windows/Fonts/Arial.ttf", 24);
-	if (font == nullptr) {
-		SDL_Log("Could not open font: %s", SDL_GetError());
-		TTF_DestroyRendererTextEngine(text_engine);
-		SDL_DestroyRenderer(renderer);
-		SDL_DestroyWindow(window);
-		return 1;
-	}
-	SDL_Color color = { 255, 255, 255, 255 };
-	auto text_surface = TTF_RenderText_Solid(font, "Hello World", 0, color);
-	SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+    SDL_Init(SDL_INIT_VIDEO);
+    SDL_Window* window = SDL_CreateWindow("Hello World", 640, 480, 0);
+    if (window == nullptr) {
+        SDL_Log("Could not create window: %s", SDL_GetError());
+        return 1;
+    }
+    SDL_Renderer* renderer = SDL_CreateRenderer(window, "direct3d11");
+    if (renderer == nullptr) {
+        SDL_Log("Could not create renderer: %s", SDL_GetError());
+        SDL_DestroyWindow(window);
+        return 1;
+    }
 
-	SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    TTF_Init();
 
-	SDL_RenderTexture(renderer, texture, nullptr, nullptr);
+    TTF_Font* font = TTF_OpenFont("C:/Windows/Fonts/Arial.ttf", 24);
+    if (font == nullptr) {
+        SDL_Log("Could not open font: %s", SDL_GetError());
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        return 1;
+    }
+    // 设置字体hinting为轻量级
+    TTF_SetFontHinting(font, TTF_HINTING_LIGHT);
+    // 设置字体为 SDF 模式
+    // TTF_SetFontSDF(font, true);
+    // 设置渲染器的混合模式
+    SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
 
-	SDL_RenderClear(renderer);
-	SDL_RenderPresent(renderer);
+    SDL_Color color = { 255, 255, 255, 255 };  // 白色文字
+    auto text_surface = TTF_RenderText_Blended(font, "Hello World", 0, color);
+    if (text_surface == nullptr) {
+        SDL_Log("Could not render text: %s", SDL_GetError());
+        TTF_CloseFont(font);
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        return 1;
+    }
 
-	SDL_Event e;
-	while (true) {
-		if (!SDL_PollEvent(&e)) {
-			std::this_thread::sleep_for(std::chrono::milliseconds(1));
-			continue;
-		}
-		if (e.type == SDL_EVENT_QUIT) {
-			break;
-		}
-	}
-	SDL_DestroyRenderer(renderer);
-	SDL_DestroyWindow(window);
-	SDL_Quit();
-	TTF_Quit();
-	return 0;
+    SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+    SDL_DestroySurface(text_surface);  // 释放surface
+
+    if (texture == nullptr) {
+        SDL_Log("Could not create texture: %s", SDL_GetError());
+        TTF_CloseFont(font);
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        return 1;
+    }
+
+    // SDL3 新方法获取纹理尺寸
+    float text_width, text_height;
+    SDL_GetTextureSize(texture, &text_width, &text_height);
+    SDL_FRect dest_rect = { 100, 100, text_width, text_height };
+
+    SDL_Event e;
+    bool running = true;
+    while (running) {
+        while (SDL_PollEvent(&e)) {
+            if (e.type == SDL_EVENT_QUIT) {
+                running = false;
+            }
+        }
+
+        // 正确的渲染顺序
+        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);  // 黑色背景
+        SDL_RenderClear(renderer);                        // 先清屏
+
+        SDL_RenderTexture(renderer, texture, nullptr, &dest_rect);  // 然后绘制文字
+
+        SDL_RenderPresent(renderer);                      // 最后呈现
+
+        std::this_thread::sleep_for(std::chrono::milliseconds(16));  // ~60 FPS
+    }
+
+    // 清理资源
+    SDL_DestroyTexture(texture);
+    TTF_CloseFont(font);
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    TTF_Quit();
+    SDL_Quit();
+
+    return 0;
 }