115 lines
4.0 KiB
C++
115 lines
4.0 KiB
C++
#include <thread>
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#include <chrono>
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#include "SDL3/SDL_init.h"
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#include "SDL3/SDL_render.h"
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#include "SDL3/SDL_video.h"
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#include "SDL3/SDL_log.h"
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#include "SDL3/SDL_timer.h"
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#include "SDL3/SDL_gpu.h"
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#include "SDL3_ttf/SDL_ttf.h"
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int main(int argc, char* argv[]) {
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SDL_Init(SDL_INIT_VIDEO);
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SDL_Window* window = SDL_CreateWindow("Hello World", 640, 480, 0);
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if (window == nullptr) {
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SDL_Log("Could not create window: %s", SDL_GetError());
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return 1;
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}
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SDL_Renderer* renderer = SDL_CreateRenderer(window, "direct3d12,metal,vulkan");
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if (renderer == nullptr) {
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SDL_Log("Could not create renderer: %s", SDL_GetError());
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SDL_DestroyWindow(window);
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return 1;
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}
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auto gpu_device = (SDL_GPUDevice*)SDL_GetPointerProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_GPU_DEVICE_POINTER, NULL);
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TTF_Init();
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TTF_Font* font = TTF_OpenFont("C:/Windows/Fonts/msyh.ttc", 24);
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if (font == nullptr) {
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SDL_Log("Could not open font: %s", SDL_GetError());
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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return 1;
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}
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// 设置字体hinting为轻量级
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TTF_SetFontHinting(font, TTF_HINTING_LIGHT_SUBPIXEL);
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// 设置字体为 SDF 模式
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// TTF_SetFontSDF(font, true);
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// 设置渲染器的混合模式
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SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
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SDL_Color color = { 255, 255, 255, 255 }; // 白色文字
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SDL_Color bg_color = { 0, 0, 0, 255 }; // 背景颜色
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auto text_surface = TTF_RenderText_LCD_Wrapped(font, "Hello World!\n你好，世界！🆒", 0, color, bg_color, 0);
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if (text_surface == nullptr) {
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SDL_Log("Could not render text: %s", SDL_GetError());
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TTF_CloseFont(font);
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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return 1;
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}
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SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
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SDL_DestroySurface(text_surface); // 释放surface
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if (texture == nullptr) {
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SDL_Log("Could not create texture: %s", SDL_GetError());
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TTF_CloseFont(font);
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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return 1;
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}
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// SDL3 新方法获取纹理尺寸
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float text_width, text_height;
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SDL_GetTextureSize(texture, &text_width, &text_height);
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SDL_FRect dest_rect = { 0, 0, text_width, text_height };
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SDL_GPUShaderCreateInfo shader_info;
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shader_info.code_size = 10;
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shader_info.code = nullptr; // 这里需要填入实际的着色器代码
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shader_info.entrypoint = "main";
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shader_info.format = SDL_GPU_SHADERFORMAT_DXIL;
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shader_info.stage = SDL_GPU_SHADERSTAGE_FRAGMENT;
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shader_info.num_samplers = 0;
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shader_info.num_storage_textures = 0;
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shader_info.num_uniform_buffers = 0;
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shader_info.num_storage_buffers = 0;
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auto shader = SDL_CreateGPUShader(gpu_device, &shader_info);
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SDL_GPURenderStateDesc desc;
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SDL_INIT_INTERFACE(&desc);
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desc.fragment_shader = shader;
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auto render_state = SDL_CreateGPURenderState(renderer, &desc);
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SDL_Event e;
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bool running = true;
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while (running) {
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while (SDL_PollEvent(&e)) {
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if (e.type == SDL_EVENT_QUIT) {
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running = false;
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}
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}
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// 正确的渲染顺序
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); // 黑色背景
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SDL_RenderClear(renderer); // 先清屏
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SDL_RenderTexture(renderer, texture, nullptr, &dest_rect); // 然后绘制文字
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SDL_RenderPresent(renderer); // 最后呈现
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SDL_RenderLines(renderer, nullptr, 0); // 确保没有多余的线条
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std::this_thread::sleep_for(std::chrono::milliseconds(16)); // ~60 FPS
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}
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// 清理资源
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SDL_DestroyTexture(texture);
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TTF_CloseFont(font);
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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TTF_Quit();
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SDL_Quit();
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return 0;
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}
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