kc3-lang/SDL/test/testgl2.c

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• Hash : 3dcb451f
  Author :
  Date : 2014-04-09T21:29:19
  

  Added a README file regarding WinRT support To note, this file is currently formatted with CRLF line endings, rather than LF, to allow the file to be viewed with Notepad.

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• test/testgl2.c

• /*
    Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely.
  */
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <math.h>
  
  #include "SDL_test_common.h"
  
  #ifdef __MACOS__
  #define HAVE_OPENGL
  #endif
  
  #ifdef HAVE_OPENGL
  
  #include "SDL_opengl.h"
  
  typedef struct GL_Context
  {
  #define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
  #include "../src/render/opengl/SDL_glfuncs.h"
  #undef SDL_PROC
  } GL_Context;
  
  
  /* Undefine this if you want a flat cube instead of a rainbow cube */
  #define SHADED_CUBE
  
  static SDLTest_CommonState *state;
  static SDL_GLContext context;
  static GL_Context ctx;
  
  static int LoadContext(GL_Context * data)
  {
  #if SDL_VIDEO_DRIVER_UIKIT
  #define __SDL_NOGETPROCADDR__
  #elif SDL_VIDEO_DRIVER_ANDROID
  #define __SDL_NOGETPROCADDR__
  #elif SDL_VIDEO_DRIVER_PANDORA
  #define __SDL_NOGETPROCADDR__
  #endif
  
  #if defined __SDL_NOGETPROCADDR__
  #define SDL_PROC(ret,func,params) data->func=func;
  #else
  #define SDL_PROC(ret,func,params) \
      do { \
          data->func = SDL_GL_GetProcAddress(#func); \
          if ( ! data->func ) { \
              return SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \
          } \
      } while ( 0 );
  #endif /* _SDL_NOGETPROCADDR_ */
  
  #include "../src/render/opengl/SDL_glfuncs.h"
  #undef SDL_PROC
      return 0;
  }
  
  
  /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
  static void
  quit(int rc)
  {
      if (context) {
          /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
          SDL_GL_DeleteContext(context);
      }
      SDLTest_CommonQuit(state);
      exit(rc);
  }
  
  static void
  Render()
  {
      static float color[8][3] = {
          {1.0, 1.0, 0.0},
          {1.0, 0.0, 0.0},
          {0.0, 0.0, 0.0},
          {0.0, 1.0, 0.0},
          {0.0, 1.0, 1.0},
          {1.0, 1.0, 1.0},
          {1.0, 0.0, 1.0},
          {0.0, 0.0, 1.0}
      };
      static float cube[8][3] = {
          {0.5, 0.5, -0.5},
          {0.5, -0.5, -0.5},
          {-0.5, -0.5, -0.5},
          {-0.5, 0.5, -0.5},
          {-0.5, 0.5, 0.5},
          {0.5, 0.5, 0.5},
          {0.5, -0.5, 0.5},
          {-0.5, -0.5, 0.5}
      };
  
      /* Do our drawing, too. */
      ctx.glClearColor(0.0, 0.0, 0.0, 1.0);
      ctx.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  
      ctx.glBegin(GL_QUADS);
  
  #ifdef SHADED_CUBE
      ctx.glColor3fv(color[0]);
      ctx.glVertex3fv(cube[0]);
      ctx.glColor3fv(color[1]);
      ctx.glVertex3fv(cube[1]);
      ctx.glColor3fv(color[2]);
      ctx.glVertex3fv(cube[2]);
      ctx.glColor3fv(color[3]);
      ctx.glVertex3fv(cube[3]);
  
      ctx.glColor3fv(color[3]);
      ctx.glVertex3fv(cube[3]);
      ctx.glColor3fv(color[4]);
      ctx.glVertex3fv(cube[4]);
      ctx.glColor3fv(color[7]);
      ctx.glVertex3fv(cube[7]);
      ctx.glColor3fv(color[2]);
      ctx.glVertex3fv(cube[2]);
  
      ctx.glColor3fv(color[0]);
      ctx.glVertex3fv(cube[0]);
      ctx.glColor3fv(color[5]);
      ctx.glVertex3fv(cube[5]);
      ctx.glColor3fv(color[6]);
      ctx.glVertex3fv(cube[6]);
      ctx.glColor3fv(color[1]);
      ctx.glVertex3fv(cube[1]);
  
      ctx.glColor3fv(color[5]);
      ctx.glVertex3fv(cube[5]);
      ctx.glColor3fv(color[4]);
      ctx.glVertex3fv(cube[4]);
      ctx.glColor3fv(color[7]);
      ctx.glVertex3fv(cube[7]);
      ctx.glColor3fv(color[6]);
      ctx.glVertex3fv(cube[6]);
  
      ctx.glColor3fv(color[5]);
      ctx.glVertex3fv(cube[5]);
      ctx.glColor3fv(color[0]);
      ctx.glVertex3fv(cube[0]);
      ctx.glColor3fv(color[3]);
      ctx.glVertex3fv(cube[3]);
      ctx.glColor3fv(color[4]);
      ctx.glVertex3fv(cube[4]);
  
      ctx.glColor3fv(color[6]);
      ctx.glVertex3fv(cube[6]);
      ctx.glColor3fv(color[1]);
      ctx.glVertex3fv(cube[1]);
      ctx.glColor3fv(color[2]);
      ctx.glVertex3fv(cube[2]);
      ctx.glColor3fv(color[7]);
      ctx.glVertex3fv(cube[7]);
  #else /* flat cube */
      ctx.glColor3f(1.0, 0.0, 0.0);
      ctx.glVertex3fv(cube[0]);
      ctx.glVertex3fv(cube[1]);
      ctx.glVertex3fv(cube[2]);
      ctx.glVertex3fv(cube[3]);
  
      ctx.glColor3f(0.0, 1.0, 0.0);
      ctx.glVertex3fv(cube[3]);
      ctx.glVertex3fv(cube[4]);
      ctx.glVertex3fv(cube[7]);
      ctx.glVertex3fv(cube[2]);
  
      ctx.glColor3f(0.0, 0.0, 1.0);
      ctx.glVertex3fv(cube[0]);
      ctx.glVertex3fv(cube[5]);
      ctx.glVertex3fv(cube[6]);
      ctx.glVertex3fv(cube[1]);
  
      ctx.glColor3f(0.0, 1.0, 1.0);
      ctx.glVertex3fv(cube[5]);
      ctx.glVertex3fv(cube[4]);
      ctx.glVertex3fv(cube[7]);
      ctx.glVertex3fv(cube[6]);
  
      ctx.glColor3f(1.0, 1.0, 0.0);
      ctx.glVertex3fv(cube[5]);
      ctx.glVertex3fv(cube[0]);
      ctx.glVertex3fv(cube[3]);
      ctx.glVertex3fv(cube[4]);
  
      ctx.glColor3f(1.0, 0.0, 1.0);
      ctx.glVertex3fv(cube[6]);
      ctx.glVertex3fv(cube[1]);
      ctx.glVertex3fv(cube[2]);
      ctx.glVertex3fv(cube[7]);
  #endif /* SHADED_CUBE */
  
      ctx.glEnd();
  
      ctx.glMatrixMode(GL_MODELVIEW);
      ctx.glRotatef(5.0, 1.0, 1.0, 1.0);
  }
  
  int
  main(int argc, char *argv[])
  {
      int fsaa, accel;
      int value;
      int i, done;
      SDL_DisplayMode mode;
      SDL_Event event;
      Uint32 then, now, frames;
      int status;
      int dw, dh;
  
      /* Enable standard application logging */
      SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
  
      /* Initialize parameters */
      fsaa = 0;
      accel = -1;
  
      /* Initialize test framework */
      state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
      if (!state) {
          return 1;
      }
      for (i = 1; i < argc;) {
          int consumed;
  
          consumed = SDLTest_CommonArg(state, i);
          if (consumed == 0) {
              if (SDL_strcasecmp(argv[i], "--fsaa") == 0 && i+1 < argc) {
                  fsaa = atoi(argv[i+1]);
                  consumed = 2;
              } else if (SDL_strcasecmp(argv[i], "--accel") == 0 && i+1 < argc) {
                  accel = atoi(argv[i+1]);
                  consumed = 2;
              } else {
                  consumed = -1;
              }
          }
          if (consumed < 0) {
              SDL_Log("Usage: %s %s [--fsaa n] [--accel n]\n", argv[0],
                      SDLTest_CommonUsage(state));
              quit(1);
          }
          i += consumed;
      }
  
      /* Set OpenGL parameters */
      state->window_flags |= SDL_WINDOW_OPENGL;
      state->gl_red_size = 5;
      state->gl_green_size = 5;
      state->gl_blue_size = 5;
      state->gl_depth_size = 16;
      state->gl_double_buffer = 1;
      if (fsaa) {
          state->gl_multisamplebuffers = 1;
          state->gl_multisamplesamples = fsaa;
      }
      if (accel >= 0) {
          state->gl_accelerated = accel;
      }
  
      if (!SDLTest_CommonInit(state)) {
          quit(2);
      }
  
      /* Create OpenGL context */
      context = SDL_GL_CreateContext(state->windows[0]);
      if (!context) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
          quit(2);
      }
      
      /* Important: call this *after* creating the context */
      if (LoadContext(&ctx) < 0) {
          SDL_Log("Could not load GL functions\n");
          quit(2);
          return 0;
      }
  
      if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
          /* try late-swap-tearing first. If not supported, try normal vsync. */
          if (SDL_GL_SetSwapInterval(-1) == -1) {
              SDL_GL_SetSwapInterval(1);
          }
      } else {
          SDL_GL_SetSwapInterval(0);  /* disable vsync. */
      }
  
      SDL_GetCurrentDisplayMode(0, &mode);
      SDL_Log("Screen BPP    : %d\n", SDL_BITSPERPIXEL(mode.format));
      SDL_Log("Swap Interval : %d\n", SDL_GL_GetSwapInterval());
      SDL_GetWindowSize(state->windows[0], &dw, &dh);
      SDL_Log("Window Size   : %d,%d\n", dw, dh);
      SDL_GL_GetDrawableSize(state->windows[0], &dw, &dh);
      SDL_Log("Draw Size     : %d,%d\n", dw, dh);
      SDL_Log("\n");
      SDL_Log("Vendor        : %s\n", ctx.glGetString(GL_VENDOR));
      SDL_Log("Renderer      : %s\n", ctx.glGetString(GL_RENDERER));
      SDL_Log("Version       : %s\n", ctx.glGetString(GL_VERSION));
      SDL_Log("Extensions    : %s\n", ctx.glGetString(GL_EXTENSIONS));
      SDL_Log("\n");
  
      status = SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
      if (!status) {
          SDL_Log("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
      } else {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_RED_SIZE: %s\n", SDL_GetError());
      }
      status = SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
      if (!status) {
          SDL_Log("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
      } else {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_GREEN_SIZE: %s\n", SDL_GetError());
      }
      status = SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
      if (!status) {
          SDL_Log("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
      } else {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_BLUE_SIZE: %s\n", SDL_GetError());
      }
      status = SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
      if (!status) {
          SDL_Log("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", 16, value);
      } else {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_DEPTH_SIZE: %s\n", SDL_GetError());
      }
      if (fsaa) {
          status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
          if (!status) {
              SDL_Log("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
          } else {
              SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_MULTISAMPLEBUFFERS: %s\n",
                     SDL_GetError());
          }
          status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
          if (!status) {
              SDL_Log("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa,
                     value);
          } else {
              SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_MULTISAMPLESAMPLES: %s\n",
                     SDL_GetError());
          }
      }
      if (accel >= 0) {
          status = SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
          if (!status) {
              SDL_Log("SDL_GL_ACCELERATED_VISUAL: requested %d, got %d\n", accel,
                     value);
          } else {
  			SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_ACCELERATED_VISUAL: %s\n",
                     SDL_GetError());
          }
      }
  
      /* Set rendering settings */
      ctx.glMatrixMode(GL_PROJECTION);
      ctx.glLoadIdentity();
      ctx.glOrtho(-2.0, 2.0, -2.0, 2.0, -20.0, 20.0);
      ctx.glMatrixMode(GL_MODELVIEW);
      ctx.glLoadIdentity();
      ctx.glEnable(GL_DEPTH_TEST);
      ctx.glDepthFunc(GL_LESS);
      ctx.glShadeModel(GL_SMOOTH);
      
      /* Main render loop */
      frames = 0;
      then = SDL_GetTicks();
      done = 0;
      while (!done) {
          /* Check for events */
          ++frames;
          while (SDL_PollEvent(&event)) {
              SDLTest_CommonEvent(state, &event, &done);
          }
          for (i = 0; i < state->num_windows; ++i) {
              int w, h;
              if (state->windows[i] == NULL)
                  continue;
              SDL_GL_MakeCurrent(state->windows[i], context);
              SDL_GL_GetDrawableSize(state->windows[i], &w, &h);
              ctx.glViewport(0, 0, w, h);
              Render();
              SDL_GL_SwapWindow(state->windows[i]);
          }
      }
  
      /* Print out some timing information */
      now = SDL_GetTicks();
      if (now > then) {
          SDL_Log("%2.2f frames per second\n",
                 ((double) frames * 1000) / (now - then));
      }
      quit(0);
      return 0;
  }
  
  #else /* HAVE_OPENGL */
  
  int
  main(int argc, char *argv[])
  {
      SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "No OpenGL support on this system\n");
      return 1;
  }
  
  #endif /* HAVE_OPENGL */
  

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