+++ /dev/null
-
-/*
- * glDrawPixels demo/test/benchmark
- *
- * Brian Paul September 25, 1997 This file is in the public domain.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
-#include <GL/glut.h>
-
-#include "readtex.h"
-
-#define IMAGE_FILE "../images/girl.rgb"
-
-static int ImgWidth, ImgHeight;
-static GLenum ImgFormat;
-static GLubyte *Image = NULL;
-
-static int Xpos, Ypos;
-static int SkipPixels, SkipRows;
-static int DrawWidth, DrawHeight;
-static int Scissor = 0;
-static int Fog = 0;
-static GLfloat Zpos = -1.0;
-static float Xzoom, Yzoom;
-static GLboolean DrawFront = GL_FALSE;
-static GLboolean Dither = GL_TRUE;
-static int win = 0;
-
-
-static void Reset( void )
-{
- Xpos = Ypos = 20;
- DrawWidth = ImgWidth;
- DrawHeight = ImgHeight;
- SkipPixels = SkipRows = 0;
- Scissor = 0;
- Fog = 0;
- Zpos = -1.0;
- Xzoom = Yzoom = 1.0;
-}
-
-
-static void Display( void )
-{
- glClear( GL_COLOR_BUFFER_BIT );
-
-#if 0
- glRasterPos2i(Xpos, Ypos);
-#else
- /* This allows negative raster positions: */
- glRasterPos3f(0, 0, Zpos);
- glBitmap(0, 0, 0, 0, Xpos, Ypos, NULL);
-#endif
-
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
-
- glPixelZoom( Xzoom, Yzoom );
-
- if (Scissor)
- glEnable(GL_SCISSOR_TEST);
-
- if (Fog)
- glEnable(GL_FOG);
-
- glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
-
- glDisable(GL_SCISSOR_TEST);
- glDisable(GL_FOG);
-
- if (DrawFront)
- glFinish();
- else
- glutSwapBuffers();
-}
-
-
-static void Benchmark( void )
-{
- int startTime, endTime;
- int draws = 500;
- double seconds, pixelsPerSecond;
-
- printf("Benchmarking...\n");
- /* GL set-up */
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
- glPixelZoom( Xzoom, Yzoom );
- if (Scissor)
- glEnable(GL_SCISSOR_TEST);
- if (Fog)
- glEnable(GL_FOG);
-
- if (DrawFront)
- glDrawBuffer(GL_FRONT);
- else
- glDrawBuffer(GL_BACK);
-
- /* Run timing test */
- draws = 0;
- startTime = glutGet(GLUT_ELAPSED_TIME);
- do {
- glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
- draws++;
- endTime = glutGet(GLUT_ELAPSED_TIME);
- } while (endTime - startTime < 4000); /* 4 seconds */
-
- /* GL clean-up */
- glDisable(GL_SCISSOR_TEST);
- glDisable(GL_FOG);
-
- /* Results */
- seconds = (double) (endTime - startTime) / 1000.0;
- pixelsPerSecond = draws * DrawWidth * DrawHeight / seconds;
- printf("Result: %d draws in %f seconds = %f pixels/sec\n",
- draws, seconds, pixelsPerSecond);
-}
-
-
-static void Reshape( int width, int height )
-{
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho( 0.0, width, 0.0, height, 0.0, 2.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-
- glScissor(width/4, height/4, width/2, height/2);
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case ' ':
- Reset();
- break;
- case 'd':
- Dither = !Dither;
- if (Dither)
- glEnable(GL_DITHER);
- else
- glDisable(GL_DITHER);
- break;
- case 'w':
- if (DrawWidth > 0)
- DrawWidth--;
- break;
- case 'W':
- DrawWidth++;
- break;
- case 'h':
- if (DrawHeight > 0)
- DrawHeight--;
- break;
- case 'H':
- DrawHeight++;
- break;
- case 'p':
- if (SkipPixels > 0)
- SkipPixels--;
- break;
- case 'P':
- SkipPixels++;
- break;
- case 'r':
- if (SkipRows > 0)
- SkipRows--;
- break;
- case 'R':
- SkipRows++;
- break;
- case 's':
- Scissor = !Scissor;
- break;
- case 'x':
- Xzoom -= 0.1;
- break;
- case 'X':
- Xzoom += 0.1;
- break;
- case 'y':
- Yzoom -= 0.1;
- break;
- case 'Y':
- Yzoom += 0.1;
- break;
- case 'z':
- Zpos -= 0.1;
- printf("RasterPos Z = %g\n", Zpos);
- break;
- case 'Z':
- Zpos += 0.1;
- printf("RasterPos Z = %g\n", Zpos);
- break;
- case 'b':
- Benchmark();
- break;
- case 'F':
- Fog = !Fog;
- printf("Fog %d\n", Fog);
- break;
- case 'f':
- DrawFront = !DrawFront;
- if (DrawFront)
- glDrawBuffer(GL_FRONT);
- else
- glDrawBuffer(GL_BACK);
- printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK");
- break;
- case 27:
- glutDestroyWindow(win);
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- Ypos += 1;
- break;
- case GLUT_KEY_DOWN:
- Ypos -= 1;
- break;
- case GLUT_KEY_LEFT:
- Xpos -= 1;
- break;
- case GLUT_KEY_RIGHT:
- Xpos += 1;
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Init( GLboolean ciMode, const char *filename )
-{
- static const GLfloat fogColor[4] = {0, 1, 0, 0};
-
- printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
-
- Image = LoadRGBImage( filename, &ImgWidth, &ImgHeight, &ImgFormat );
- if (!Image) {
- printf("Couldn't read %s\n", filename);
- exit(0);
- }
-
- if (ciMode) {
- /* Convert RGB image to grayscale */
- GLubyte *indexImage = (GLubyte *) malloc( ImgWidth * ImgHeight );
- GLint i;
- for (i=0; i<ImgWidth*ImgHeight; i++) {
- int gray = Image[i*3] + Image[i*3+1] + Image[i*3+2];
- indexImage[i] = gray / 3;
- }
- free(Image);
- Image = indexImage;
- ImgFormat = GL_COLOR_INDEX;
-
- for (i=0;i<255;i++) {
- float g = i / 255.0;
- glutSetColor(i, g, g, g);
- }
- }
-
- printf("Loaded %d by %d image\n", ImgWidth, ImgHeight );
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);
-
- glFogi(GL_FOG_MODE, GL_LINEAR);
- glFogf(GL_FOG_START, 0);
- glFogf(GL_FOG_END, 2);
- glFogfv(GL_FOG_COLOR, fogColor);
-
- Reset();
-}
-
-
-static void Usage(void)
-{
- printf("Keys:\n");
- printf(" SPACE Reset Parameters\n");
- printf(" Up/Down Move image up/down\n");
- printf(" Left/Right Move image left/right\n");
- printf(" x Decrease X-axis PixelZoom\n");
- printf(" X Increase X-axis PixelZoom\n");
- printf(" y Decrease Y-axis PixelZoom\n");
- printf(" Y Increase Y-axis PixelZoom\n");
- printf(" w Decrease glDrawPixels width*\n");
- printf(" W Increase glDrawPixels width*\n");
- printf(" h Decrease glDrawPixels height*\n");
- printf(" H Increase glDrawPixels height*\n");
- printf(" p Decrease GL_UNPACK_SKIP_PIXELS*\n");
- printf(" P Increase GL_UNPACK_SKIP_PIXELS*\n");
- printf(" r Decrease GL_UNPACK_SKIP_ROWS*\n");
- printf(" R Increase GL_UNPACK_SKIP_ROWS*\n");
- printf(" s Toggle GL_SCISSOR_TEST\n");
- printf(" F Toggle GL_FOG\n");
- printf(" z Decrease RasterPos Z\n");
- printf(" Z Increase RasterPos Z\n");
-
- printf(" f Toggle front/back buffer drawing\n");
- printf(" b Benchmark test\n");
- printf(" ESC Exit\n");
- printf("* Warning: no limits are imposed on these parameters so it's\n");
- printf(" possible to cause a segfault if you go too far.\n");
-}
-
-
-int main( int argc, char *argv[] )
-{
- GLboolean ciMode = GL_FALSE;
- const char *filename = IMAGE_FILE;
- int i = 1;
-
- glutInitWindowSize( 500, 400 );
- glutInit( &argc, argv );
-
- if (argc > i && strcmp(argv[i], "-ci")==0) {
- ciMode = GL_TRUE;
- i++;
- }
- if (argc > i) {
- filename = argv[i];
- }
-
- if (ciMode)
- glutInitDisplayMode( GLUT_INDEX | GLUT_DOUBLE );
- else
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE);
-
- win = glutCreateWindow(argv[0]);
-
- Init(ciMode, filename);
- Usage();
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff