Question

os：最新的ArchLinux。

你好，使用此代码：

#include <SDL2/SDL.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    /* SDL */
    SDL_Window *fenetre = NULL;
    SDL_Renderer *rendu = NULL;
    SDL_Texture *texture = NULL;

    /* Init SDL */
    if(0 != SDL_Init(SDL_INIT_VIDEO))
    {
        fprintf(stderr, "Erreur SDL_Init : %s", SDL_GetError());
        goto Quit;
    }

    fenetre = SDL_CreateWindow(" Essai texture", SDL_WINDOWPOS_UNDEFINED,
                               SDL_WINDOWPOS_UNDEFINED, 500, 500, SDL_WINDOW_SHOWN);
    if(NULL == fenetre)
    {
        fprintf(stderr, "Erreur SDL_CreateWindow : %s", SDL_GetError());
        goto Quit;
    }

    rendu = SDL_CreateRenderer(fenetre, -1, SDL_RENDERER_ACCELERATED);
    if(NULL == rendu)
    {
        fprintf(stderr, "Erreur SDL_CreateRenderer : %s", SDL_GetError());
        goto Quit;
    }

    /* Color */
    if(0 != SDL_SetRenderDrawColor(rendu, 242, 243, 244, 255))
    {
        fprintf(stderr, "Erreur SDL_SetRenderDrawColor : %s", SDL_GetError());
        goto Quit;
    }

    /* renderClear */
    if(0 != SDL_RenderClear(rendu))
    {
        fprintf(stderr, "Erreur SDL_RenderClear : %s", SDL_GetError());
        goto Quit;
    }

    /* Create la texture */
    texture = SDL_CreateTexture(rendu, SDL_PIXELFORMAT_RGBA8888,
                                SDL_TEXTUREACCESS_TARGET, 400, 400);
    if(NULL == texture)
    {
        fprintf(stderr, "Erreur SDL_CreateTexture : %s", SDL_GetError());
        goto Quit;
    }

    /* Colore la texture */
    SDL_SetRenderTarget(rendu, texture);
    SDL_SetRenderDrawColor(rendu, 242, 110, 160, 255);
    SDL_RenderFillRect(rendu, NULL);
    SDL_SetRenderTarget(rendu, NULL);

    /* Show texture in bottom */
    SDL_Rect dst = {50, 250, 400, 200};
    SDL_RenderCopy(rendu, texture, NULL, &dst);
    SDL_RenderPresent(rendu);
    SDL_Delay(3000); //

    /* And show texture in top */
    dst.y = 50;
    SDL_RenderCopy(rendu, texture, NULL, &dst);
    SDL_RenderPresent(rendu);
    SDL_Delay(3000);

Quit:
    if(NULL != texture)
        SDL_DestroyTexture(texture);
    if(NULL != rendu)
        SDL_DestroyRenderer(rendu);
    if(NULL != fenetre)
        SDL_DestroyWindow(fenetre);
    SDL_Quit();
    return 0;
}

在第二个SDL_RenderPresent中，纹理显示效果很好，但是背景中的窗口为黑色。在CreateRenderer中使用标志SDL_RENDERER_SOFTWARE，效果很好。

我尝试使用debian，即使使用标志SDL_RENDERER_ACCELERATED也可以正常工作。

有人对Archlinux有点不便，也可能是解决方案。

先谢谢您

First RenderPresent

Second RenderPresent

在C中显示纹理的SDL2问题

0 个答案: