Nanako/SDL3Test
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修复渲染问题

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This commit is contained in:
daiqingshuang
2025-05-28 17:34:08 +08:00
parent 76a4edd6ed
commit 6ebd3494a0
2 changed files with 83 additions and 54 deletions
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2
CMakeLists.txt
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@@ -7,6 +7,8 @@ project(mirage)
include(cmake/project_cpp_standard.cmake)
set_cpp_standard(23)
set(BUILD_SHARED_LIBS OFF)
include(cmake/retrieve_files.cmake)
include(cmake/detect_os.cmake)
include(cmake/config_macos.cmake)

135
src/main.cpp
View File

@@ -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;
}