From 5a24c66915a555d72a6377e073a732ab9d6be461 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Fri, 6 Nov 2009 09:22:46 +0000 Subject: trivial: add vbo-tri, an even simpler version of tri.c --- progs/trivial/Makefile | 1 + progs/trivial/vbo-tri.c | 131 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) create mode 100644 progs/trivial/vbo-tri.c (limited to 'progs/trivial') diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile index 70728616d2..e15ec33ab5 100644 --- a/progs/trivial/Makefile +++ b/progs/trivial/Makefile @@ -153,6 +153,7 @@ SOURCES = \ tristrip-clip.c \ tristrip-flat.c \ tristrip.c \ + vbo-tri.c \ vbo-drawarrays.c \ vbo-noninterleaved.c \ vbo-drawelements.c \ diff --git a/progs/trivial/vbo-tri.c b/progs/trivial/vbo-tri.c new file mode 100644 index 0000000000..d4cba14414 --- /dev/null +++ b/progs/trivial/vbo-tri.c @@ -0,0 +1,131 @@ +/* Even simpler for many drivers than trivial/tri -- pass-through + * vertex shader and vertex data in a VBO. + */ + +#include +#include +#include +#include +#include +#include +#include + + +struct { + GLfloat pos[4]; + GLfloat color[4]; +} verts[] = +{ + { { -0.9, -0.9, 0.0, 1.0 }, + {.8,0,0, 1}, + }, + + { { 0.9, -0.9, 0.0, 1.0 }, + { 0, .9, 0, 1 }, + }, + + { { 0, 0.9, 0.0, 1.0 }, + {0,0,.7, 1}, + }, +}; + +GLuint arrayObj; + +static void Init( void ) +{ + GLint errno; + GLuint prognum; + + static const char *prog1 = + "!!ARBvp1.0\n" + "MOV result.color, vertex.color;\n" + "MOV result.position, vertex.position;\n" + "END\n"; + + + glGenProgramsARB(1, &prognum); + + glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum); + glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, + strlen(prog1), (const GLubyte *) prog1); + + assert(glIsProgramARB(prognum)); + errno = glGetError(); + printf("glGetError = %d\n", errno); + if (errno != GL_NO_ERROR) + { + GLint errorpos; + + glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos); + printf("errorpos: %d\n", errorpos); + printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB)); + } + + + glEnableClientState( GL_VERTEX_ARRAY ); + glEnableClientState( GL_COLOR_ARRAY ); + + glGenBuffersARB(1, &arrayObj); + glBindBufferARB(GL_ARRAY_BUFFER_ARB, arrayObj); + glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts, GL_STATIC_DRAW_ARB); + + glVertexPointer( 4, GL_FLOAT, sizeof(verts[0]), 0 ); + glColorPointer( 4, GL_FLOAT, sizeof(verts[0]), (void *)(4*sizeof(float)) ); +} + + + +static void Display( void ) +{ + glClearColor(0.3, 0.3, 0.3, 1); + glClear( GL_COLOR_BUFFER_BIT ); + + glEnable(GL_VERTEX_PROGRAM_NV); + glDrawArrays( GL_TRIANGLES, 0, 3 ); + + glutSwapBuffers(); +} + + +static void Reshape( int width, int height ) +{ + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + /*glTranslatef( 0.0, 0.0, -15.0 );*/ +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + + + +int main( int argc, char *argv[] ) +{ + glutInit( &argc, argv ); + glutInitWindowPosition( 0, 0 ); + glutInitWindowSize( 250, 250 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); + glutCreateWindow(argv[0]); + glewInit(); + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutDisplayFunc( Display ); + Init(); + glutMainLoop(); + return 0; +} -- cgit v1.2.3 From 8353162a4c7d2798a88a39ea24674e601fe95f6f Mon Sep 17 00:00:00 2001 From: Jakob Bornecrantz Date: Fri, 6 Nov 2009 18:40:04 +0000 Subject: progs/trivial: Ignores --- progs/trivial/.gitignore | 1 + 1 file changed, 1 insertion(+) (limited to 'progs/trivial') diff --git a/progs/trivial/.gitignore b/progs/trivial/.gitignore index 4d6e405c50..4317eb607f 100644 --- a/progs/trivial/.gitignore +++ b/progs/trivial/.gitignore @@ -147,6 +147,7 @@ vbo-drawarrays vbo-drawelements vbo-drawrange vbo-noninterleaved +vbo-tri vp-array vp-array-int vp-clip -- cgit v1.2.3 From 98c2b5338156513a43cf18d50d731ad15a12fe04 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Fri, 6 Nov 2009 20:46:27 +0000 Subject: trivial: make tri-orig more closely match the original version of tri... --- progs/trivial/tri-orig.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'progs/trivial') diff --git a/progs/trivial/tri-orig.c b/progs/trivial/tri-orig.c index e7cfee3a36..5300f59ece 100644 --- a/progs/trivial/tri-orig.c +++ b/progs/trivial/tri-orig.c @@ -51,7 +51,7 @@ static void Reshape(int width, int height) glMatrixMode(GL_PROJECTION); glLoadIdentity(); -/* glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */ + glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); glMatrixMode(GL_MODELVIEW); } @@ -74,11 +74,11 @@ static void Draw(void) glBegin(GL_TRIANGLES); glColor3f(0,0,.7); - glVertex3f( 0.9, -0.9, -0.0); + glVertex3f( 0.9, -0.9, -30.0); glColor3f(.8,0,0); - glVertex3f( 0.9, 0.9, -0.0); + glVertex3f( 0.9, 0.9, -30.0); glColor3f(0,.9,0); - glVertex3f(-0.9, 0.0, -0.0); + glVertex3f(-0.9, 0.0, -30.0); glEnd(); glFlush(); @@ -119,7 +119,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB | GLUT_ALPHA; + type = GLUT_RGB; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); -- cgit v1.2.3