testgl.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:17k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <math.h>
- #include "SDL.h"
- #ifdef HAVE_OPENGL
- #include "SDL_opengl.h"
- /* Undefine this if you want a flat cube instead of a rainbow cube */
- #define SHADED_CUBE
- /* Define this to be the name of the logo image to use with -logo */
- #define LOGO_FILE "icon.bmp"
- /* The SDL_OPENGLBLIT interface is deprecated.
- The code is still available for benchmark purposes though.
- */
- static SDL_bool USE_DEPRECATED_OPENGLBLIT = SDL_FALSE;
- /**********************************************************************/
- void HotKey_ToggleFullScreen(void)
- {
- SDL_Surface *screen;
- screen = SDL_GetVideoSurface();
- if ( SDL_WM_ToggleFullScreen(screen) ) {
- printf("Toggled fullscreen mode - now %sn",
- (screen->flags&SDL_FULLSCREEN) ? "fullscreen" : "windowed");
- } else {
- printf("Unable to toggle fullscreen moden");
- }
- }
- void HotKey_ToggleGrab(void)
- {
- SDL_GrabMode mode;
- printf("Ctrl-G: toggling input grab!n");
- mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
- if ( mode == SDL_GRAB_ON ) {
- printf("Grab was onn");
- } else {
- printf("Grab was offn");
- }
- mode = SDL_WM_GrabInput(!mode);
- if ( mode == SDL_GRAB_ON ) {
- printf("Grab is now onn");
- } else {
- printf("Grab is now offn");
- }
- }
- void HotKey_Iconify(void)
- {
- printf("Ctrl-Z: iconifying window!n");
- SDL_WM_IconifyWindow();
- }
- int HandleEvent(SDL_Event *event)
- {
- int done;
- done = 0;
- switch( event->type ) {
- case SDL_ACTIVEEVENT:
- /* See what happened */
- printf( "app %s ", event->active.gain ? "gained" : "lost" );
- if ( event->active.state & SDL_APPACTIVE ) {
- printf( "active " );
- } else if ( event->active.state & SDL_APPMOUSEFOCUS ) {
- printf( "mouse " );
- } else if ( event->active.state & SDL_APPINPUTFOCUS ) {
- printf( "input " );
- }
- printf( "focusn" );
- break;
- case SDL_KEYDOWN:
- if ( event->key.keysym.sym == SDLK_ESCAPE ) {
- done = 1;
- }
- if ( (event->key.keysym.sym == SDLK_g) &&
- (event->key.keysym.mod & KMOD_CTRL) ) {
- HotKey_ToggleGrab();
- }
- if ( (event->key.keysym.sym == SDLK_z) &&
- (event->key.keysym.mod & KMOD_CTRL) ) {
- HotKey_Iconify();
- }
- if ( (event->key.keysym.sym == SDLK_RETURN) &&
- (event->key.keysym.mod & KMOD_ALT) ) {
- HotKey_ToggleFullScreen();
- }
- printf("key '%s' pressedn",
- SDL_GetKeyName(event->key.keysym.sym));
- break;
- case SDL_QUIT:
- done = 1;
- break;
- }
- return(done);
- }
- void SDL_GL_Enter2DMode()
- {
- SDL_Surface *screen = SDL_GetVideoSurface();
- /* Note, there may be other things you need to change,
- depending on how you have your OpenGL state set up.
- */
- glPushAttrib(GL_ENABLE_BIT);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_CULL_FACE);
- glEnable(GL_TEXTURE_2D);
- /* This allows alpha blending of 2D textures with the scene */
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glViewport(0, 0, screen->w, screen->h);
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
- glOrtho(0.0, (GLdouble)screen->w, (GLdouble)screen->h, 0.0, 0.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
- }
- void SDL_GL_Leave2DMode()
- {
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glPopAttrib();
- }
- /* Quick utility function for texture creation */
- static int power_of_two(int input)
- {
- int value = 1;
- while ( value < input ) {
- value <<= 1;
- }
- return value;
- }
- GLuint SDL_GL_LoadTexture(SDL_Surface *surface, GLfloat *texcoord)
- {
- GLuint texture;
- int w, h;
- SDL_Surface *image;
- SDL_Rect area;
- Uint32 saved_flags;
- Uint8 saved_alpha;
- /* Use the surface width and height expanded to powers of 2 */
- w = power_of_two(surface->w);
- h = power_of_two(surface->h);
- texcoord[0] = 0.0f; /* Min X */
- texcoord[1] = 0.0f; /* Min Y */
- texcoord[2] = (GLfloat)surface->w / w; /* Max X */
- texcoord[3] = (GLfloat)surface->h / h; /* Max Y */
- image = SDL_CreateRGBSurface(
- SDL_SWSURFACE,
- w, h,
- 32,
- #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
- 0x000000FF,
- 0x0000FF00,
- 0x00FF0000,
- 0xFF000000
- #else
- 0xFF000000,
- 0x00FF0000,
- 0x0000FF00,
- 0x000000FF
- #endif
- );
- if ( image == NULL ) {
- return 0;
- }
- /* Save the alpha blending attributes */
- saved_flags = surface->flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
- saved_alpha = surface->format->alpha;
- if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
- SDL_SetAlpha(surface, 0, 0);
- }
- /* Copy the surface into the GL texture image */
- area.x = 0;
- area.y = 0;
- area.w = surface->w;
- area.h = surface->h;
- SDL_BlitSurface(surface, &area, image, &area);
- /* Restore the alpha blending attributes */
- if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
- SDL_SetAlpha(surface, saved_flags, saved_alpha);
- }
- /* Create an OpenGL texture for the image */
- glGenTextures(1, &texture);
- glBindTexture(GL_TEXTURE_2D, texture);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexImage2D(GL_TEXTURE_2D,
- 0,
- GL_RGBA,
- w, h,
- 0,
- GL_RGBA,
- GL_UNSIGNED_BYTE,
- image->pixels);
- SDL_FreeSurface(image); /* No longer needed */
- return texture;
- }
- void DrawLogoTexture(void)
- {
- static GLuint texture;
- static GLfloat texMinX, texMinY;
- static GLfloat texMaxX, texMaxY;
- static int x = 0;
- static int y = 0;
- static int w, h;
- static int delta_x = 1;
- static int delta_y = 1;
- static Uint32 last_moved = 0;
- SDL_Surface *screen = SDL_GetVideoSurface();
- if ( ! texture ) {
- SDL_Surface *image;
- GLfloat texcoord[4];
- /* Load the image (could use SDL_image library here) */
- image = SDL_LoadBMP(LOGO_FILE);
- if ( image == NULL ) {
- return;
- }
- w = image->w;
- h = image->h;
- /* Convert the image into an OpenGL texture */
- texture = SDL_GL_LoadTexture(image, texcoord);
- /* Make texture coordinates easy to understand */
- texMinX = texcoord[0];
- texMinY = texcoord[1];
- texMaxX = texcoord[2];
- texMaxY = texcoord[3];
- /* We don't need the original image anymore */
- SDL_FreeSurface(image);
- /* Make sure that the texture conversion is okay */
- if ( ! texture ) {
- return;
- }
- }
- /* Move the image around */
- x += delta_x;
- if ( x < 0 ) {
- x = 0;
- delta_x = -delta_x;
- } else
- if ( (x+w) > screen->w ) {
- x = screen->w-w;
- delta_x = -delta_x;
- }
- y += delta_y;
- if ( y < 0 ) {
- y = 0;
- delta_y = -delta_y;
- } else
- if ( (y+h) > screen->h ) {
- y = screen->h-h;
- delta_y = -delta_y;
- }
- /* Show the image on the screen */
- SDL_GL_Enter2DMode();
- glBindTexture(GL_TEXTURE_2D, texture);
- glBegin(GL_TRIANGLE_STRIP);
- glTexCoord2f(texMinX, texMinY); glVertex2i(x, y );
- glTexCoord2f(texMaxX, texMinY); glVertex2i(x+w, y );
- glTexCoord2f(texMinX, texMaxY); glVertex2i(x, y+h);
- glTexCoord2f(texMaxX, texMaxY); glVertex2i(x+w, y+h);
- glEnd();
- SDL_GL_Leave2DMode();
- }
- /* This code is deprecated, but available for speed comparisons */
- void DrawLogoBlit(void)
- {
- static SDL_Surface *image = NULL;
- static GLuint texture;
- static GLfloat texMinX, texMinY;
- static GLfloat texMaxX, texMaxY;
- static int x = 0;
- static int y = 0;
- static int w, h;
- static int delta_x = 1;
- static int delta_y = 1;
- static Uint32 last_moved = 0;
- SDL_Rect dst;
- SDL_Surface *screen = SDL_GetVideoSurface();
- if ( image == NULL ) {
- SDL_Surface *temp;
- /* Load the image (could use SDL_image library here) */
- temp = SDL_LoadBMP(LOGO_FILE);
- if ( temp == NULL ) {
- return;
- }
- w = temp->w;
- h = temp->h;
- /* Convert the image into the screen format */
- image = SDL_CreateRGBSurface(
- SDL_SWSURFACE,
- w, h,
- screen->format->BitsPerPixel,
- screen->format->Rmask,
- screen->format->Gmask,
- screen->format->Bmask,
- screen->format->Amask);
- if ( image ) {
- SDL_BlitSurface(temp, NULL, image, NULL);
- }
- SDL_FreeSurface(temp);
- /* Make sure that the texture conversion is okay */
- if ( ! image ) {
- return;
- }
- }
- /* Move the image around
- Note that we do not clear the old position. This is because we
- perform a glClear() which clears the framebuffer and then only
- update the new area.
- Note that you can also achieve interesting effects by modifying
- the screen surface alpha channel. It's set to 255 by default..
- */
- x += delta_x;
- if ( x < 0 ) {
- x = 0;
- delta_x = -delta_x;
- } else
- if ( (x+w) > screen->w ) {
- x = screen->w-w;
- delta_x = -delta_x;
- }
- y += delta_y;
- if ( y < 0 ) {
- y = 0;
- delta_y = -delta_y;
- } else
- if ( (y+h) > screen->h ) {
- y = screen->h-h;
- delta_y = -delta_y;
- }
- dst.x = x;
- dst.y = y;
- dst.w = w;
- dst.h = h;
- SDL_BlitSurface(image, NULL, screen, &dst);
- /* Show the image on the screen */
- SDL_UpdateRects(screen, 1, &dst);
- }
- int RunGLTest( int argc, char* argv[],
- int logo, int slowly, int bpp, float gamma, int noframe )
- {
- int i;
- int rgb_size[3];
- int w = 640;
- int h = 480;
- int done = 0;
- int frames;
- Uint32 start_time, this_time;
- 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}};
- 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}};
- Uint32 video_flags;
- int value;
- if( SDL_Init( SDL_INIT_VIDEO ) < 0 ) {
- fprintf(stderr,"Couldn't initialize SDL: %sn",SDL_GetError());
- exit( 1 );
- }
- /* See if we should detect the display depth */
- if ( bpp == 0 ) {
- if ( SDL_GetVideoInfo()->vfmt->BitsPerPixel <= 8 ) {
- bpp = 8;
- } else {
- bpp = 16; /* More doesn't seem to work */
- }
- }
- /* Set the flags we want to use for setting the video mode */
- if ( logo && USE_DEPRECATED_OPENGLBLIT ) {
- video_flags = SDL_OPENGLBLIT;
- } else {
- video_flags = SDL_OPENGL;
- }
- for ( i=1; argv[i]; ++i ) {
- if ( strcmp(argv[1], "-fullscreen") == 0 ) {
- video_flags |= SDL_FULLSCREEN;
- }
- }
- if (noframe) {
- video_flags |= SDL_NOFRAME;
- }
- /* Initialize the display */
- switch (bpp) {
- case 8:
- rgb_size[0] = 2;
- rgb_size[1] = 3;
- rgb_size[2] = 3;
- break;
- case 15:
- case 16:
- rgb_size[0] = 5;
- rgb_size[1] = 5;
- rgb_size[2] = 5;
- break;
- default:
- rgb_size[0] = 8;
- rgb_size[1] = 8;
- rgb_size[2] = 8;
- break;
- }
- SDL_GL_SetAttribute( SDL_GL_RED_SIZE, rgb_size[0] );
- SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, rgb_size[1] );
- SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, rgb_size[2] );
- SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
- SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
- if ( SDL_SetVideoMode( w, h, bpp, video_flags ) == NULL ) {
- fprintf(stderr, "Couldn't set GL mode: %sn", SDL_GetError());
- SDL_Quit();
- exit(1);
- }
- printf("Screen BPP: %dn", SDL_GetVideoSurface()->format->BitsPerPixel);
- printf("n");
- printf( "Vendor : %sn", glGetString( GL_VENDOR ) );
- printf( "Renderer : %sn", glGetString( GL_RENDERER ) );
- printf( "Version : %sn", glGetString( GL_VERSION ) );
- printf( "Extensions : %sn", glGetString( GL_EXTENSIONS ) );
- printf("n");
- SDL_GL_GetAttribute( SDL_GL_RED_SIZE, &value );
- printf( "SDL_GL_RED_SIZE: requested %d, got %dn", rgb_size[0],value);
- SDL_GL_GetAttribute( SDL_GL_GREEN_SIZE, &value );
- printf( "SDL_GL_GREEN_SIZE: requested %d, got %dn", rgb_size[1],value);
- SDL_GL_GetAttribute( SDL_GL_BLUE_SIZE, &value );
- printf( "SDL_GL_BLUE_SIZE: requested %d, got %dn", rgb_size[2],value);
- SDL_GL_GetAttribute( SDL_GL_DEPTH_SIZE, &value );
- printf( "SDL_GL_DEPTH_SIZE: requested %d, got %dn", bpp, value );
- SDL_GL_GetAttribute( SDL_GL_DOUBLEBUFFER, &value );
- printf( "SDL_GL_DOUBLEBUFFER: requested 1, got %dn", value );
- /* Set the window manager title bar */
- SDL_WM_SetCaption( "SDL GL test", "testgl" );
- /* Set the gamma for the window */
- if ( gamma != 0.0 ) {
- SDL_SetGamma(gamma, gamma, gamma);
- }
- glViewport( 0, 0, w, h );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity( );
- glOrtho( -2.0, 2.0, -2.0, 2.0, -20.0, 20.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity( );
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- glShadeModel(GL_SMOOTH);
- /* Loop until done. */
- start_time = SDL_GetTicks();
- frames = 0;
- while( !done ) {
- GLenum gl_error;
- char* sdl_error;
- SDL_Event event;
- /* Do our drawing, too. */
- glClearColor( 0.0, 0.0, 0.0, 1.0 );
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glBegin( GL_QUADS );
- #ifdef SHADED_CUBE
- glColor3fv(color[0]);
- glVertex3fv(cube[0]);
- glColor3fv(color[1]);
- glVertex3fv(cube[1]);
- glColor3fv(color[2]);
- glVertex3fv(cube[2]);
- glColor3fv(color[3]);
- glVertex3fv(cube[3]);
- glColor3fv(color[3]);
- glVertex3fv(cube[3]);
- glColor3fv(color[4]);
- glVertex3fv(cube[4]);
- glColor3fv(color[7]);
- glVertex3fv(cube[7]);
- glColor3fv(color[2]);
- glVertex3fv(cube[2]);
- glColor3fv(color[0]);
- glVertex3fv(cube[0]);
- glColor3fv(color[5]);
- glVertex3fv(cube[5]);
- glColor3fv(color[6]);
- glVertex3fv(cube[6]);
- glColor3fv(color[1]);
- glVertex3fv(cube[1]);
- glColor3fv(color[5]);
- glVertex3fv(cube[5]);
- glColor3fv(color[4]);
- glVertex3fv(cube[4]);
- glColor3fv(color[7]);
- glVertex3fv(cube[7]);
- glColor3fv(color[6]);
- glVertex3fv(cube[6]);
- glColor3fv(color[5]);
- glVertex3fv(cube[5]);
- glColor3fv(color[0]);
- glVertex3fv(cube[0]);
- glColor3fv(color[3]);
- glVertex3fv(cube[3]);
- glColor3fv(color[4]);
- glVertex3fv(cube[4]);
- glColor3fv(color[6]);
- glVertex3fv(cube[6]);
- glColor3fv(color[1]);
- glVertex3fv(cube[1]);
- glColor3fv(color[2]);
- glVertex3fv(cube[2]);
- glColor3fv(color[7]);
- glVertex3fv(cube[7]);
- #else // flat cube
- glColor3f(1.0, 0.0, 0.0);
- glVertex3fv(cube[0]);
- glVertex3fv(cube[1]);
- glVertex3fv(cube[2]);
- glVertex3fv(cube[3]);
- glColor3f(0.0, 1.0, 0.0);
- glVertex3fv(cube[3]);
- glVertex3fv(cube[4]);
- glVertex3fv(cube[7]);
- glVertex3fv(cube[2]);
- glColor3f(0.0, 0.0, 1.0);
- glVertex3fv(cube[0]);
- glVertex3fv(cube[5]);
- glVertex3fv(cube[6]);
- glVertex3fv(cube[1]);
- glColor3f(0.0, 1.0, 1.0);
- glVertex3fv(cube[5]);
- glVertex3fv(cube[4]);
- glVertex3fv(cube[7]);
- glVertex3fv(cube[6]);
- glColor3f(1.0, 1.0, 0.0);
- glVertex3fv(cube[5]);
- glVertex3fv(cube[0]);
- glVertex3fv(cube[3]);
- glVertex3fv(cube[4]);
- glColor3f(1.0, 0.0, 1.0);
- glVertex3fv(cube[6]);
- glVertex3fv(cube[1]);
- glVertex3fv(cube[2]);
- glVertex3fv(cube[7]);
- #endif /* SHADED_CUBE */
- glEnd( );
- glMatrixMode(GL_MODELVIEW);
- glRotatef(5.0, 1.0, 1.0, 1.0);
- /* Draw 2D logo onto the 3D display */
- if ( logo ) {
- if ( USE_DEPRECATED_OPENGLBLIT ) {
- DrawLogoBlit();
- } else {
- DrawLogoTexture();
- }
- }
- SDL_GL_SwapBuffers( );
- /* Check for error conditions. */
- gl_error = glGetError( );
- if( gl_error != GL_NO_ERROR ) {
- fprintf( stderr, "testgl: OpenGL error: %dn", gl_error );
- }
- sdl_error = SDL_GetError( );
- if( sdl_error[0] != ' ' ) {
- fprintf(stderr, "testgl: SDL error '%s'n", sdl_error);
- SDL_ClearError();
- }
- /* Allow the user to see what's happening */
- if ( slowly ) {
- SDL_Delay( 20 );
- }
- /* Check if there's a pending event. */
- while( SDL_PollEvent( &event ) ) {
- done = HandleEvent(&event);
- }
- ++frames;
- }
- /* Print out the frames per second */
- this_time = SDL_GetTicks();
- if ( this_time != start_time ) {
- printf("%2.2f FPSn",
- ((float)frames/(this_time-start_time))*1000.0);
- }
- /* Destroy our GL context, etc. */
- SDL_Quit( );
- return(0);
- }
- int main(int argc, char *argv[])
- {
- int i, logo;
- int numtests;
- int bpp = 0;
- int slowly;
- float gamma = 0.0;
- int noframe = 0;
- logo = 0;
- slowly = 0;
- numtests = 1;
- for ( i=1; argv[i]; ++i ) {
- if ( strcmp(argv[i], "-twice") == 0 ) {
- ++numtests;
- }
- if ( strcmp(argv[i], "-logo") == 0 ) {
- logo = 1;
- USE_DEPRECATED_OPENGLBLIT = SDL_FALSE;
- }
- if ( strcmp(argv[i], "-logoblit") == 0 ) {
- logo = 1;
- USE_DEPRECATED_OPENGLBLIT = SDL_TRUE;
- }
- if ( strcmp(argv[i], "-slow") == 0 ) {
- slowly = 1;
- }
- if ( strcmp(argv[i], "-bpp") == 0 ) {
- bpp = atoi(argv[++i]);
- }
- if ( strcmp(argv[i], "-gamma") == 0 ) {
- gamma = (float)atof(argv[++i]);
- }
- if ( strcmp(argv[i], "-noframe") == 0 ) {
- noframe = 1;
- }
- if ( strncmp(argv[i], "-h", 2) == 0 ) {
- printf(
- "Usage: %s [-twice] [-logo] [-slow] [-bpp n] [-gamma n] [-noframe]n",
- argv[0]);
- exit(0);
- }
- }
- for ( i=0; i<numtests; ++i ) {
- RunGLTest(argc, argv, logo, slowly, bpp, gamma, noframe);
- }
- return 0;
- }
- #else /* HAVE_OPENGL */
- int main(int argc, char *argv[])
- {
- printf("No OpenGL support on this systemn");
- return 1;
- }
- #endif /* HAVE_OPENGL */