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我有几个纹理将在我的屏幕上保持静止。我不想在渲染时单独渲染每一个,而是想将它们全部渲染为一个纹理。到目前为止,我的代码如下所示:

SDL_Texture* target_texture = NULL;
SDL_SetRenderTarget(renderer, target_texture);
SDL_RenderCopy(renderer, texture1, NULL, &dst1);
SDL_RenderCopy(renderer, texture2, NULL, &dst2);
SDL_RenderCopy(renderer, texture3, NULL, &dst3);
.
.
.
SDL_SetRenderTarget(renderer, NULL);
SDL_RendererPresent(renderer);
// Here the screen displays as I want
SDL_Delay(2000);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, target_texture, NULL, NULL);
SDL_RendererPresent(renderer);
// Here the screen is black as though target_texture is still NULL
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1 回答 1

6

您必须创建您的 target_texture,目前它始终为 NULL。将您的第一行替换为:

target_texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, target_width, target_height);
于 2013-12-23T01:59:31.763 回答