From 67cc1f6ba6645b7eb231591a6de574eade9511a0 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Thu, 19 May 2005 15:39:37 +0000 Subject: move osmesa demos to their own directory --- progs/osdemos/Makefile | 73 +++++++++++ progs/osdemos/osdemo.c | 322 +++++++++++++++++++++++++++++++++++++++++++++++ progs/osdemos/osdemo16.c | 291 ++++++++++++++++++++++++++++++++++++++++++ progs/osdemos/osdemo32.c | 308 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 994 insertions(+) create mode 100644 progs/osdemos/Makefile create mode 100644 progs/osdemos/osdemo.c create mode 100644 progs/osdemos/osdemo16.c create mode 100644 progs/osdemos/osdemo32.c (limited to 'progs/osdemos') diff --git a/progs/osdemos/Makefile b/progs/osdemos/Makefile new file mode 100644 index 0000000000..03ab78ac08 --- /dev/null +++ b/progs/osdemos/Makefile @@ -0,0 +1,73 @@ +# progs/demos/Makefile + +TOP = ../.. +include $(TOP)/configs/current + +INCDIR = $(TOP)/include + +OSMESA_LIBS = -L$(LIB_DIR) -lglut -lOSMesa -lGLU -lGL $(APP_LIB_DEPS) + +OSMESA16_LIBS = -L$(LIB_DIR) -lglut -lOSMesa16 -lGLU -lGL $(APP_LIB_DEPS) + +OSMESA32_LIBS = -L$(LIB_DIR) -lglut -lOSMesa32 -lGLU -lGL $(APP_LIB_DEPS) + +LIB_DEP = $(LIB_DIR)/$(GL_LIB_NAME) $(LIB_DIR)/$(GLU_LIB_NAME) $(LIB_DIR)/$(GLUT_LIB_NAME) + +PROGS = \ + osdemo + + +##### RULES ##### + +.SUFFIXES: +.SUFFIXES: .c + + +# make executable from .c file: +.c: $(LIB_DEP) readtex.o + $(CC) -I$(INCDIR) $(CFLAGS) $< readtex.o $(APP_LIB_DEPS) -o $@ + + +##### TARGETS ##### + +default: readtex.o $(PROGS) + + +readtex.c: $(TOP)/progs/util/readtex.c + cp $< . + +readtex.h: $(TOP)/progs/util/readtex.h + cp $< . + +readtex.o: readtex.c readtex.h + $(CC) -c -I$(INCDIR) $(CFLAGS) readtex.c + + +showbuffer.c: $(TOP)/progs/util/showbuffer.c + cp $< . + +showbuffer.h: $(TOP)/progs/util/showbuffer.h + cp $< . + +showbuffer.o: showbuffer.c showbuffer.h + $(CC) -c -I$(INCDIR) $(CFLAGS) showbuffer.c + + +# special case: need the -lOSMesa library: +osdemo: osdemo.c + $(CC) -I$(INCDIR) $(CFLAGS) osdemo.c $(OSMESA_LIBS) -o $@ + +# another special case: need the -lOSMesa16 library: +osdemo16: osdemo16.c + $(CC) -I$(INCDIR) $(CFLAGS) osdemo16.c $(OSMESA16_LIBS) -o $@ + +# another special case: need the -lOSMesa32 library: +osdemo32: osdemo32.c + $(CC) -I$(INCDIR) $(CFLAGS) osdemo32.c $(OSMESA32_LIBS) -o $@ + + + +clean: + -rm -f $(PROGS) + -rm -f *.o *~ + -rm -f readtex.[ch] showbuffer.[ch] diff --git a/progs/osdemos/osdemo.c b/progs/osdemos/osdemo.c new file mode 100644 index 0000000000..cdb3c72423 --- /dev/null +++ b/progs/osdemos/osdemo.c @@ -0,0 +1,322 @@ + +/* + * Demo of off-screen Mesa rendering + * + * See Mesa/include/GL/osmesa.h for documentation of the OSMesa functions. + * + * If you want to render BIG images you'll probably have to increase + * MAX_WIDTH and MAX_HEIGHT in src/config.h. + * + * This program is in the public domain. + * + * Brian Paul + * + * PPM output provided by Joerg Schmalzl. + * ASCII PPM output added by Brian Paul. + * + * Usage: osdemo [-perf] [filename] + * + * -perf: Redraws the image 1000 times, displaying the FPS every 5 secs. + * filename: file to store the TGA or PPM output + */ + + +#include +#include +#include +#include "GL/osmesa.h" +#include "GL/glut.h" + + +#define SAVE_TARGA + + +#define WIDTH 400 +#define HEIGHT 400 + +static GLint T0 = 0; +static GLint Frames = 0; +static int perf = 0; + +static void render_image( void ) +{ + GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 }; + GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; + GLfloat red_mat[] = { 1.0, 0.2, 0.2, 1.0 }; + GLfloat green_mat[] = { 0.2, 1.0, 0.2, 1.0 }; + GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 }; + + + glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); + glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); + glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); + glLightfv(GL_LIGHT0, GL_POSITION, light_position); + + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0); + glMatrixMode(GL_MODELVIEW); + + glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(20.0, 1.0, 0.0, 0.0); + + glPushMatrix(); + glTranslatef(-0.75, 0.5, 0.0); + glRotatef(90.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat ); + glutSolidTorus(0.275, 0.85, 20, 20); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(-0.75, -0.5, 0.0); + glRotatef(270.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat ); + glutSolidCone(1.0, 2.0, 16, 1); + glPopMatrix(); + +#ifdef GL_HP_occlusion_test + if (perf == 0) { + GLboolean bRet; + glDepthMask(GL_FALSE); + glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE); + glEnable(GL_OCCLUSION_TEST_HP); + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + + glPushMatrix(); + glTranslatef(0.75, 0.0, -1.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); + glutSolidSphere(1.0, 20, 20); + glPopMatrix(); + + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + printf("Occlusion test 1 (result should be 1): %d\n",bRet); + + glDepthMask(GL_TRUE); + glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); + glDisable(GL_OCCLUSION_TEST_HP); + } +#endif + + glPushMatrix(); + glTranslatef(0.75, 0.0, -1.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); + glutSolidSphere(1.0, 20, 20); + glPopMatrix(); + +#ifdef GL_HP_occlusion_test + if (perf == 0){ + GLboolean bRet; + + glDepthMask(GL_FALSE); + glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE); + glEnable(GL_OCCLUSION_TEST_HP); + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + + /* draw a sphere inside the previous sphere */ + glPushMatrix(); + glTranslatef(0.75, 0.0, -1.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); + glutSolidSphere(0.5, 20, 20); + glPopMatrix(); + + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + printf("Occlusion test 2 (result should be 0): %d\n",bRet); + + glDepthMask(GL_TRUE); + glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); + glDisable(GL_OCCLUSION_TEST_HP); + } +#endif + + glPopMatrix(); + + /* This is very important!!! + * Make sure buffered commands are finished!!! + */ + glFinish(); + + Frames++; + if (perf) { + GLint t = glutGet(GLUT_ELAPSED_TIME); + if (t - T0 >= 5000) { + GLfloat seconds = (t - T0) / 1000.0; + GLfloat fps = Frames / seconds; + printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps); + T0 = t; + Frames = 0; + } + } +} + + +#ifdef SAVE_TARGA + +static void +write_targa(const char *filename, const GLubyte *buffer, int width, int height) +{ + FILE *f = fopen( filename, "w" ); + if (f) { + int i, x, y; + const GLubyte *ptr = buffer; + printf ("osdemo, writing tga file \n"); + fputc (0x00, f); /* ID Length, 0 => No ID */ + fputc (0x00, f); /* Color Map Type, 0 => No color map included */ + fputc (0x02, f); /* Image Type, 2 => Uncompressed, True-color Image */ + fputc (0x00, f); /* Next five bytes are about the color map entries */ + fputc (0x00, f); /* 2 bytes Index, 2 bytes length, 1 byte size */ + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); /* X-origin of Image */ + fputc (0x00, f); + fputc (0x00, f); /* Y-origin of Image */ + fputc (0x00, f); + fputc (WIDTH & 0xff, f); /* Image Width */ + fputc ((WIDTH>>8) & 0xff, f); + fputc (HEIGHT & 0xff, f); /* Image Height */ + fputc ((HEIGHT>>8) & 0xff, f); + fputc (0x18, f); /* Pixel Depth, 0x18 => 24 Bits */ + fputc (0x20, f); /* Image Descriptor */ + fclose(f); + f = fopen( filename, "ab" ); /* reopen in binary append mode */ + for (y=height-1; y>=0; y--) { + for (x=0; x=0; y--) { + for (x=0; x=0; y--) { + for (x=0; x= 305 + /* specify Z, stencil, accum sizes */ + OSMesaContext ctx = OSMesaCreateContextExt( OSMESA_RGBA, 16, 0, 0, NULL ); +#else + OSMesaContext ctx = OSMesaCreateContext( OSMESA_RGBA, NULL ); +#endif + if (!ctx) { + printf("OSMesaCreateContext failed!\n"); + return 0; + } + + for ( i=1; i +#include +#include "GL/osmesa.h" +#include "GL/glut.h" + + +#define SAVE_TARGA + + +#define WIDTH 400 +#define HEIGHT 400 + + + +static void render_image( void ) +{ + GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 }; + GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; + GLfloat red_mat[] = { 1.0, 0.2, 0.2, 1.0 }; + GLfloat green_mat[] = { 0.2, 1.0, 0.2, 0.5 }; + GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 }; + GLfloat white_mat[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat purple_mat[] = { 1.0, 0.2, 1.0, 1.0 }; + GLUquadricObj *qobj = gluNewQuadric(); + + glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); + glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); + glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); + glLightfv(GL_LIGHT0, GL_POSITION, light_position); + + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0); + glMatrixMode(GL_MODELVIEW); + + glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(20.0, 1.0, 0.0, 0.0); + +#if 0 + glPushMatrix(); + glTranslatef(-0.75, 0.5, 0.0); + glRotatef(90.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat ); + glutSolidTorus(0.275, 0.85, 20, 20); + glPopMatrix(); +#endif + + /* red square */ + glPushMatrix(); + glTranslatef(0.0, -0.5, 0.0); + glRotatef(90, 1, 0.5, 0); + glScalef(3, 3, 3); + glDisable(GL_LIGHTING); + glColor4f(1, 0, 0, 0.5); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); + +#if 0 + /* green square */ + glPushMatrix(); + glTranslatef(0.0, 0.5, 0.1); + glDisable(GL_LIGHTING); + glColor3f(0, 1, 0); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); + + /* blue square */ + glPushMatrix(); + glTranslatef(0.75, 0.5, 0.3); + glDisable(GL_LIGHTING); + glColor3f(0, 0, 0.5); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); +#endif + glPushMatrix(); + glTranslatef(-0.75, -0.5, 0.0); + glRotatef(270.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat ); + glColor4f(0,1,0,0.5); + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + gluCylinder(qobj, 1.0, 0.0, 2.0, 16, 1); + glDisable(GL_BLEND); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(0.75, 1.0, 1.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); + gluSphere(qobj, 1.0, 20, 20); + glPopMatrix(); + + glPopMatrix(); + + /* This is very important!!! + * Make sure buffered commands are finished!!! + */ + glFinish(); + + gluDeleteQuadric(qobj); + + { + GLint r, g, b, a; + glGetIntegerv(GL_RED_BITS, &r); + glGetIntegerv(GL_GREEN_BITS, &g); + glGetIntegerv(GL_BLUE_BITS, &b); + glGetIntegerv(GL_ALPHA_BITS, &a); + printf("channel sizes: %d %d %d %d\n", r, g, b, a); + } +} + + + +static void +write_targa(const char *filename, const GLushort *buffer, int width, int height) +{ + FILE *f = fopen( filename, "w" ); + if (f) { + int i, x, y; + const GLushort *ptr = buffer; + printf ("osdemo, writing tga file \n"); + fputc (0x00, f); /* ID Length, 0 => No ID */ + fputc (0x00, f); /* Color Map Type, 0 => No color map included */ + fputc (0x02, f); /* Image Type, 2 => Uncompressed, True-color Image */ + fputc (0x00, f); /* Next five bytes are about the color map entries */ + fputc (0x00, f); /* 2 bytes Index, 2 bytes length, 1 byte size */ + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); /* X-origin of Image */ + fputc (0x00, f); + fputc (0x00, f); /* Y-origin of Image */ + fputc (0x00, f); + fputc (WIDTH & 0xff, f); /* Image Width */ + fputc ((WIDTH>>8) & 0xff, f); + fputc (HEIGHT & 0xff, f); /* Image Height */ + fputc ((HEIGHT>>8) & 0xff, f); + fputc (0x18, f); /* Pixel Depth, 0x18 => 24 Bits */ + fputc (0x20, f); /* Image Descriptor */ + fclose(f); + f = fopen( filename, "ab" ); /* reopen in binary append mode */ + for (y=height-1; y>=0; y--) { + for (x=0; x> 8, f); /* write blue */ + fputc(ptr[i+1] >> 8, f); /* write green */ + fputc(ptr[i] >> 8, f); /* write red */ + } + } + } +} + + +static void +write_ppm(const char *filename, const GLushort *buffer, int width, int height) +{ + const int binary = 0; + FILE *f = fopen( filename, "w" ); + if (f) { + int i, x, y; + const GLushort *ptr = buffer; + if (binary) { + fprintf(f,"P6\n"); + fprintf(f,"# ppm-file created by osdemo.c\n"); + fprintf(f,"%i %i\n", width,height); + fprintf(f,"255\n"); + fclose(f); + f = fopen( filename, "ab" ); /* reopen in binary append mode */ + for (y=height-1; y>=0; y--) { + for (x=0; x> 8, f); /* write red */ + fputc(ptr[i+1] >> 8, f); /* write green */ + fputc(ptr[i+2] >> 8, f); /* write blue */ + } + } + } + else { + /*ASCII*/ + int counter = 0; + fprintf(f,"P3\n"); + fprintf(f,"# ascii ppm file created by osdemo.c\n"); + fprintf(f,"%i %i\n", width, height); + fprintf(f,"255\n"); + for (y=height-1; y>=0; y--) { + for (x=0; x> 8, ptr[i+1] >> 8, ptr[i+2] >> 8); + counter++; + if (counter % 5 == 0) + fprintf(f, "\n"); + } + } + } + fclose(f); + } +} + + + +int main( int argc, char *argv[] ) +{ + GLushort *buffer; + + /* Create an RGBA-mode context */ +#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 + /* specify Z, stencil, accum sizes */ + OSMesaContext ctx = OSMesaCreateContextExt( GL_RGBA, 16, 0, 0, NULL ); +#else + OSMesaContext ctx = OSMesaCreateContext( GL_RGBA, NULL ); +#endif + if (!ctx) { + printf("OSMesaCreateContext failed!\n"); + return 0; + } + + /* Allocate the image buffer */ + buffer = (GLushort *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLushort)); + if (!buffer) { + printf("Alloc image buffer failed!\n"); + return 0; + } + + /* Bind the buffer to the context and make it current */ + if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_SHORT, WIDTH, HEIGHT )) { + printf("OSMesaMakeCurrent failed!\n"); + return 0; + } + + render_image(); + + if (argc>1) { +#ifdef SAVE_TARGA + write_targa(argv[1], buffer, WIDTH, HEIGHT); +#else + write_ppm(argv[1], buffer, WIDTH, HEIGHT); +#endif + } + else { + printf("Specify a filename if you want to make an image file\n"); + } + + printf("all done\n"); + + /* free the image buffer */ + free( buffer ); + + /* destroy the context */ + OSMesaDestroyContext( ctx ); + + return 0; +} diff --git a/progs/osdemos/osdemo32.c b/progs/osdemos/osdemo32.c new file mode 100644 index 0000000000..7295b46a83 --- /dev/null +++ b/progs/osdemos/osdemo32.c @@ -0,0 +1,308 @@ +/* + * Demo of off-screen Mesa rendering with 32-bit float color channels. + * This requires the libOSMesa32.so library. + * + * Compile with something like this: + * + * gcc osdemo32.c -I../../include -L../../lib -lglut -lGLU -lOSMesa32 -lm -o osdemo32 + */ + + +#include +#include +#include "GL/osmesa.h" +#include "GL/glut.h" + + +#define SAVE_TARGA + + +#define WIDTH 400 +#define HEIGHT 400 + + + +static void render_image( void ) +{ + GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 }; + GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; + GLfloat red_mat[] = { 1.0, 0.2, 0.2, 1.0 }; + GLfloat green_mat[] = { 0.2, 1.0, 0.2, 0.5 }; + GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 }; + GLfloat white_mat[] = { 1.0, 1.0, 1.0, 1.0 }; + GLfloat purple_mat[] = { 1.0, 0.2, 1.0, 1.0 }; + GLUquadricObj *qobj = gluNewQuadric(); + + glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); + glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); + glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); + glLightfv(GL_LIGHT0, GL_POSITION, light_position); + + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0); + glMatrixMode(GL_MODELVIEW); + + glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(20.0, 1.0, 0.0, 0.0); + +#if 0 + glPushMatrix(); + glTranslatef(-0.75, 0.5, 0.0); + glRotatef(90.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat ); + glutSolidTorus(0.275, 0.85, 20, 20); + glPopMatrix(); +#endif + + /* red square */ + glPushMatrix(); + glTranslatef(0.0, -0.5, 0.0); + glRotatef(90, 1, 0.5, 0); + glScalef(3, 3, 3); + glDisable(GL_LIGHTING); + glColor4f(1, 0, 0, 0.5); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); + +#if 0 + /* green square */ + glPushMatrix(); + glTranslatef(0.0, 0.5, 0.1); + glDisable(GL_LIGHTING); + glColor3f(0, 1, 0); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); + + /* blue square */ + glPushMatrix(); + glTranslatef(0.75, 0.5, 0.3); + glDisable(GL_LIGHTING); + glColor3f(0, 0, 0.5); + glBegin(GL_POLYGON); + glVertex2f(-1, -1); + glVertex2f( 1, -1); + glVertex2f( 1, 1); + glVertex2f(-1, 1); + glEnd(); + glEnable(GL_LIGHTING); + glPopMatrix(); +#endif + glPushMatrix(); + glTranslatef(-0.75, -0.5, 0.0); + glRotatef(270.0, 1.0, 0.0, 0.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat ); + glColor4f(0,1,0,0.5); + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + gluCylinder(qobj, 1.0, 0.0, 2.0, 16, 1); + glDisable(GL_BLEND); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(0.75, 1.0, 1.0); + glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); + gluSphere(qobj, 1.0, 20, 20); + glPopMatrix(); + + glPopMatrix(); + + /* This is very important!!! + * Make sure buffered commands are finished!!! + */ + glFinish(); + + gluDeleteQuadric(qobj); + + { + GLint r, g, b, a; + glGetIntegerv(GL_RED_BITS, &r); + glGetIntegerv(GL_GREEN_BITS, &g); + glGetIntegerv(GL_BLUE_BITS, &b); + glGetIntegerv(GL_ALPHA_BITS, &a); + printf("channel sizes: %d %d %d %d\n", r, g, b, a); + } +} + + + +static void +write_targa(const char *filename, const GLfloat *buffer, int width, int height) +{ + FILE *f = fopen( filename, "w" ); + if (f) { + int i, x, y; + const GLfloat *ptr = buffer; + printf ("osdemo, writing tga file \n"); + fputc (0x00, f); /* ID Length, 0 => No ID */ + fputc (0x00, f); /* Color Map Type, 0 => No color map included */ + fputc (0x02, f); /* Image Type, 2 => Uncompressed, True-color Image */ + fputc (0x00, f); /* Next five bytes are about the color map entries */ + fputc (0x00, f); /* 2 bytes Index, 2 bytes length, 1 byte size */ + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); + fputc (0x00, f); /* X-origin of Image */ + fputc (0x00, f); + fputc (0x00, f); /* Y-origin of Image */ + fputc (0x00, f); + fputc (WIDTH & 0xff, f); /* Image Width */ + fputc ((WIDTH>>8) & 0xff, f); + fputc (HEIGHT & 0xff, f); /* Image Height */ + fputc ((HEIGHT>>8) & 0xff, f); + fputc (0x18, f); /* Pixel Depth, 0x18 => 24 Bits */ + fputc (0x20, f); /* Image Descriptor */ + fclose(f); + f = fopen( filename, "ab" ); /* reopen in binary append mode */ + for (y=height-1; y>=0; y--) { + for (x=0; x 255) r = 255; + if (g > 255) g = 255; + if (b > 255) b = 255; + fputc(b, f); /* write blue */ + fputc(g, f); /* write green */ + fputc(r, f); /* write red */ + } + } + } +} + + +static void +write_ppm(const char *filename, const GLfloat *buffer, int width, int height) +{ + const int binary = 0; + FILE *f = fopen( filename, "w" ); + if (f) { + int i, x, y; + const GLfloat *ptr = buffer; + if (binary) { + fprintf(f,"P6\n"); + fprintf(f,"# ppm-file created by osdemo.c\n"); + fprintf(f,"%i %i\n", width,height); + fprintf(f,"255\n"); + fclose(f); + f = fopen( filename, "ab" ); /* reopen in binary append mode */ + for (y=height-1; y>=0; y--) { + for (x=0; x 255) r = 255; + if (g > 255) g = 255; + if (b > 255) b = 255; + fputc(r, f); /* write red */ + fputc(g, f); /* write green */ + fputc(b, f); /* write blue */ + } + } + } + else { + /*ASCII*/ + int counter = 0; + fprintf(f,"P3\n"); + fprintf(f,"# ascii ppm file created by osdemo.c\n"); + fprintf(f,"%i %i\n", width, height); + fprintf(f,"255\n"); + for (y=height-1; y>=0; y--) { + for (x=0; x 255) r = 255; + if (g > 255) g = 255; + if (b > 255) b = 255; + fprintf(f, " %3d %3d %3d", r, g, b); + counter++; + if (counter % 5 == 0) + fprintf(f, "\n"); + } + } + } + fclose(f); + } +} + + + +int main( int argc, char *argv[] ) +{ + GLfloat *buffer; + + /* Create an RGBA-mode context */ +#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 + /* specify Z, stencil, accum sizes */ + OSMesaContext ctx = OSMesaCreateContextExt( GL_RGBA, 16, 0, 0, NULL ); +#else + OSMesaContext ctx = OSMesaCreateContext( GL_RGBA, NULL ); +#endif + if (!ctx) { + printf("OSMesaCreateContext failed!\n"); + return 0; + } + + /* Allocate the image buffer */ + buffer = (GLfloat *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLfloat)); + if (!buffer) { + printf("Alloc image buffer failed!\n"); + return 0; + } + + /* Bind the buffer to the context and make it current */ + if (!OSMesaMakeCurrent( ctx, buffer, GL_FLOAT, WIDTH, HEIGHT )) { + printf("OSMesaMakeCurrent failed!\n"); + return 0; + } + + render_image(); + + if (argc>1) { +#ifdef SAVE_TARGA + write_targa(argv[1], buffer, WIDTH, HEIGHT); +#else + write_ppm(argv[1], buffer, WIDTH, HEIGHT); +#endif + } + else { + printf("Specify a filename if you want to make an image file\n"); + } + + printf("all done\n"); + + /* free the image buffer */ + free( buffer ); + + /* destroy the context */ + OSMesaDestroyContext( ctx ); + + return 0; +} -- cgit v1.2.3