如何使用 SDL2

如何解决如何使用 SDL2

我正在制作流行益智游戏俄罗斯方块的基于 SDL 的副本。

我开始关注的 tutorial 包含 SDL 中的所有内容，我正在尝试将其移植到 SDL2。

我在教程的帮助下实现了以下内容：

• Board.h 和 Board.cpp

• Game.h 和 Game.cpp

• IO.h

• Pieces.h 和 Pieces.cpp

本文作者的 IO.cpp 如下：

// ------ Includes -----
#include "IO.h"
static SDL_Surface *mScreen;          // Screen
static Uint32 mColors [COLOR_MAX] = {0x000000ff,     // Colors
                               0xff0000ff,0x00ff00ff,0x0000ffff,0x00ffffff,0xff00ffff,0xffff00ff,0xffffffff};
/* 
======================================         
Init
====================================== 
*/
IO::IO() 
{
 InitGraph ();
}
/* 
======================================         
Clear the screen to black
====================================== 
*/
void IO::ClearScreen() 
{
 BoxColor (mScreen,mScreen->w - 1,mScreen->h - 1,mColors[BLACK]);
}
/* 
======================================         
Draw a rectangle of a given color
Parameters:
>> pX1,pY1:   Upper left corner of the rectangle
>> pX2,pY2:   Lower right corner of the rectangle
>> pC    Rectangle color
====================================== 
*/
void IO::DrawRectangle (int pX1,int pY1,int pX2,int pY2,enum color pC)
{
 BoxColor (mScreen,pX1,pY1,pX2,pY2-1,mColors[pC]);
}
/* 
======================================         
Return the screen height
====================================== 
*/
int IO::GetScreenHeight()
{
 return mScreen->h;
}
/* 
======================================         
Update screen
====================================== 
*/
void IO::UpdateScreen()
{
 SDL_Flip(mScreen);
}
/* 
======================================         
Keyboard Input
====================================== 
*/
int IO::Pollkey()
{
 SDL_Event event;
 while ( SDL_PollEvent(&event) ) 
 {
  switch (event.type) {
   case SDL_KEYDOWN:
    return event.key.keysym.sym;
   case SDL_QUIT:
    exit(3);
  }
 }
 return -1;
}
/* 
======================================         
Keyboard Input
====================================== 
*/
int IO::Getkey()
{
 SDL_Event event;
 while (true)
 {
   SDL_WaitEvent(&event);
   if (event.type == SDL_KEYDOWN)
    break;
      if (event.type == SDL_QUIT)
    exit(3);
 };
 return event.key.keysym.sym;
}
/* 
======================================         
Keyboard Input
====================================== 
*/
int IO::IsKeyDown (int pKey)
{
 Uint8* mKeytable;
 int mNumkeys;
 SDL_PumpEvents();
 mKeytable = SDL_GetKeyState(&mNumkeys);
 return mKeytable[pKey];
}
/* 
======================================         
SDL Graphical Initialization
====================================== 
*/
int IO::InitGraph()
{
 const SDL_VideoInfo *info;
 Uint8  video_bpp;
 Uint32 videoflags;
        
 // Initialize SDL
 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
  fprintf(stderr,"Couldn't initialize SDL: %s\n",SDL_GetError());
  return 1;
 }
 atexit(SDL_Quit);
 // Alpha blending doesn't work well at 8-bit color
 info = SDL_GetVideoInfo();
 if ( info->vfmt->BitsPerPixel > 8 ) {
  video_bpp = info->vfmt->BitsPerPixel;
 } else {
  video_bpp = 16;
 }
 videoflags = SDL_SWSURFACE | SDL_DOUBLEBUF;
 
 // Set 640x480 video mode
 if ( (mScreen=SDL_SetVideoMode(640,480,video_bpp,videoflags)) == NULL ) {
  fprintf(stderr,"Couldn't set %ix%i video mode: %s\n",640,SDL_GetError());
  return 2;
 }
    return 0;
}

我面临着如何使用 SDL_GetRendererInfo()

实现 InitGraph() 方法的问题

而不是 SDL_GetVideoInfo()，因为这些 SDL 方法在 SDL2 中已弃用。

我正在使用 Visual Studio 2019 来构建这个项目。