From 6a495d26af54011ff1ec0597b38db2ce162c7d50 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Sat, 18 Apr 2009 12:55:55 -0600 Subject: demos: move streaming_rect.c demo to tests/ --- progs/tests/streaming_rect.c | 327 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 327 insertions(+) create mode 100644 progs/tests/streaming_rect.c (limited to 'progs/tests/streaming_rect.c') diff --git a/progs/tests/streaming_rect.c b/progs/tests/streaming_rect.c new file mode 100644 index 0000000000..f65ac4ce36 --- /dev/null +++ b/progs/tests/streaming_rect.c @@ -0,0 +1,327 @@ +/* + * GL_ARB_pixel_buffer_object test + * + * Command line options: + * -w WIDTH -h HEIGHT sets window size + * + */ + +#include +#include +#include +#include +#include +#include + +#include "readtex.h" + + +#define ANIMATE 10 +#define PBO 11 +#define QUIT 100 + +static GLuint DrawPBO; + +static GLboolean Animate = GL_TRUE; +static GLboolean use_pbo = 1; +static GLboolean whole_rect = 1; + +static GLfloat Drift = 0.0; +static GLfloat drift_increment = 1/255.0; +static GLfloat Xrot = 20.0, Yrot = 30.0; + +static GLuint Width = 1024; +static GLuint Height = 512; + + +static void Idle( void ) +{ + if (Animate) { + + Drift += drift_increment; + if (Drift >= 1.0) + Drift = 0.0; + + glutPostRedisplay(); + } +} + +/*static int max( int a, int b ) { return a > b ? a : b; }*/ + +#ifndef min +static int min( int a, int b ) { return a < b ? a : b; } +#endif + +static void DrawObject() +{ + GLint size = Width * Height * 4; + + if (use_pbo) { + /* XXX: This is extremely important - semantically makes the buffer + * contents undefined, but in practice means that the driver can + * release the old copy of the texture and allocate a new one + * without waiting for outstanding rendering to complete. + */ + glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO); + glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, size, NULL, GL_STREAM_DRAW_ARB); + + { + char *image = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY_ARB); + + printf("char %d\n", (unsigned char)(Drift * 255)); + + memset(image, (unsigned char)(Drift * 255), size); + + glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT); + } + + + /* BGRA is required for most hardware paths: + */ + glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0, + GL_BGRA, GL_UNSIGNED_BYTE, NULL); + } + else { + static char *image = NULL; + + if (image == NULL) + image = malloc(size); + + glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0); + + memset(image, (unsigned char)(Drift * 255), size); + + /* BGRA should be the fast path for regular uploads as well. + */ + glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0, + GL_BGRA, GL_UNSIGNED_BYTE, image); + } + + { + int x,y,w,h; + + if (whole_rect) { + x = y = 0; + w = Width; + h = Height; + } + else { + x = y = 0; + w = min(10, Width); + h = min(10, Height); + } + + glBegin(GL_QUADS); + + glTexCoord2f( x, y); + glVertex2f( x, y ); + + glTexCoord2f( x, y + h); + glVertex2f( x, y + h); + + glTexCoord2f( x + w + .5, y + h); + glVertex2f( x + w, y + h ); + + glTexCoord2f( x + w, y + .5); + glVertex2f( x + w, y ); + + glEnd(); + } +} + + + +static void Display( void ) +{ + static GLint T0 = 0; + static GLint Frames = 0; + GLint t; + + glClear( GL_COLOR_BUFFER_BIT ); + + glPushMatrix(); + DrawObject(); + glPopMatrix(); + + glutSwapBuffers(); + + Frames++; + + t = glutGet(GLUT_ELAPSED_TIME); + if (t - T0 >= 1000) { + GLfloat seconds = (t - T0) / 1000.0; + + GLfloat fps = Frames / seconds; + printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps); + fflush(stdout); + + drift_increment = 2.2 * seconds / Frames; + T0 = t; + Frames = 0; + } +} + + +static void Reshape( int width, int height ) +{ + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); +/* glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 ); */ + gluOrtho2D( 0, width, height, 0 ); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + glTranslatef(0.375, 0.375, 0); +} + + +static void ModeMenu(int entry) +{ + if (entry==ANIMATE) { + Animate = !Animate; + } + else if (entry==PBO) { + use_pbo = !use_pbo; + } + else if (entry==QUIT) { + exit(0); + } + + glutPostRedisplay(); +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void SpecialKey( int key, int x, int y ) +{ + float step = 3.0; + (void) x; + (void) y; + + switch (key) { + case GLUT_KEY_UP: + Xrot += step; + break; + case GLUT_KEY_DOWN: + Xrot -= step; + break; + case GLUT_KEY_LEFT: + Yrot += step; + break; + case GLUT_KEY_RIGHT: + Yrot -= step; + break; + } + glutPostRedisplay(); +} + + +static void Init( int argc, char *argv[] ) +{ + const char *exten = (const char *) glGetString(GL_EXTENSIONS); + GLuint texObj; + GLint size; + + + if (!strstr(exten, "GL_ARB_pixel_buffer_object")) { + printf("Sorry, GL_ARB_pixel_buffer_object not supported by this renderer.\n"); + exit(1); + } + + glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size); + printf("%d x %d max texture size\n", size, size); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + /* allocate two texture objects */ + glGenTextures(1, &texObj); + + /* setup the texture objects */ + glActiveTextureARB(GL_TEXTURE0_ARB); + glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texObj); + + glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + glGenBuffersARB(1, &DrawPBO); + + glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO); + glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, + Width * Height * 4, NULL, GL_STREAM_DRAW); + + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); + + glEnable(GL_TEXTURE_RECTANGLE_ARB); + + glShadeModel(GL_SMOOTH); + glClearColor(0.3, 0.3, 0.4, 1.0); + + if (argc > 1 && strcmp(argv[1], "-info")==0) { + printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); + printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); + printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); + printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS)); + } +} + + +int main( int argc, char *argv[] ) +{ + GLint i; + + glutInit( &argc, argv ); + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-w") == 0) { + Width = atoi(argv[i+1]); + if (Width <= 0) { + printf("Error, bad width\n"); + exit(1); + } + i++; + } + else if (strcmp(argv[i], "-h") == 0) { + Height = atoi(argv[i+1]); + if (Height <= 0) { + printf("Error, bad height\n"); + exit(1); + } + i++; + } + } + + glutInitWindowSize( Width, Height ); + glutInitWindowPosition( 0, 0 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); + glutCreateWindow(argv[0] ); + glewInit(); + + Init( argc, argv ); + + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + glutIdleFunc( Idle ); + + glutCreateMenu(ModeMenu); + glutAddMenuEntry("Toggle Animation", ANIMATE); + glutAddMenuEntry("Toggle PBO", PBO); + glutAddMenuEntry("Quit", QUIT); + glutAttachMenu(GLUT_RIGHT_BUTTON); + + glutMainLoop(); + return 0; +} -- cgit v1.2.3