From 39bd7eb6dcd97e61096bbae4041cd5eeff21e767 Mon Sep 17 00:00:00 2001 From: Jakob Bornecrantz Date: Fri, 13 Jun 2008 17:42:44 +0200 Subject: trival: Added test for undefined context of buffer --- progs/trivial/clear-undefined.c | 130 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 progs/trivial/clear-undefined.c (limited to 'progs/trivial/clear-undefined.c') diff --git a/progs/trivial/clear-undefined.c b/progs/trivial/clear-undefined.c new file mode 100644 index 0000000000..1569860f7a --- /dev/null +++ b/progs/trivial/clear-undefined.c @@ -0,0 +1,130 @@ +/* + * glClear + glScissor + Undefined content of framebuffer + */ + +#include +#include +#include +#include + + +GLenum doubleBuffer; +GLint Width = 200, Height = 150; + +static void Init(void) +{ + fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); + fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); + fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); + fprintf(stderr, "Top right corner should be red\n"); +} + +static void Reshape(int width, int height) +{ + Width = width; + Height = height; + + glViewport(0, 0, (GLint)width, (GLint)height); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); + glMatrixMode(GL_MODELVIEW); +} + +static void Key(unsigned char key, int x, int y) +{ + switch (key) { + case 27: + exit(1); + default: + glutPostRedisplay(); + return; + } + +} + +static void Draw(void) +{ + glColor4f(1.0, 0.0, 0.0, 1.0); + glBegin(GL_QUADS); + glVertex2d(0.0, 0.0); + glVertex2d(0.0, 1.0); + glVertex2d(1.0, 1.0); + glVertex2d(1.0, 0.0); + glEnd(); + + glEnable(GL_SCISSOR_TEST); + glClearColor(1, 1, 0, 0); + glScissor(Width / 2, 0, Width - Width / 2, Height / 2); + glClear(GL_COLOR_BUFFER_BIT); + + glClearColor(0, 0, 1, 0); + glScissor(0, Height / 2, Width / 2, Height - Height / 2); + glClear(GL_COLOR_BUFFER_BIT); + glDisable(GL_SCISSOR_TEST); + + glColor4f(0.0, 1.0, 0.0, 1.0); + glBegin(GL_QUADS); + glVertex2d( 0.0, 0.0); + glVertex2d( 0.0, -1.0); + glVertex2d(-1.0, -1.0); + glVertex2d(-1.0, 0.0); + glEnd(); + + glFlush(); + + if (doubleBuffer) { + glutSwapBuffers(); + } +} + +static GLenum Args(int argc, char **argv) +{ + GLint i; + + doubleBuffer = GL_TRUE; + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-sb") == 0) { + doubleBuffer = GL_FALSE; + } else if (strcmp(argv[i], "-db") == 0) { + doubleBuffer = GL_TRUE; + } else { + fprintf(stderr, "%s (Bad option).\n", argv[i]); + return GL_FALSE; + } + } + return GL_TRUE; +} + +int main(int argc, char **argv) +{ + GLenum type; + + glutInit(&argc, argv); + + if (Args(argc, argv) == GL_FALSE) { + exit(1); + } + + glutInitWindowPosition(0, 0); glutInitWindowSize( Width, Height ); + + + type = GLUT_RGB | GLUT_ALPHA; + type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; + glutInitDisplayMode(type); + + if (glutCreateWindow(argv[0]) == GL_FALSE) { + exit(1); + } + + Init(); + Reshape(Width, Height); + + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutDisplayFunc(Draw); + glutMainLoop(); + return 0; +} -- cgit v1.2.3 From d89b1e4a037b4facb84b056d2fdcd383de78b311 Mon Sep 17 00:00:00 2001 From: Jakob Bornecrantz Date: Fri, 13 Jun 2008 19:18:56 +0200 Subject: trivial: Update clear-undefined --- progs/trivial/clear-undefined.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'progs/trivial/clear-undefined.c') diff --git a/progs/trivial/clear-undefined.c b/progs/trivial/clear-undefined.c index 1569860f7a..ce066bf8e6 100644 --- a/progs/trivial/clear-undefined.c +++ b/progs/trivial/clear-undefined.c @@ -54,6 +54,13 @@ static void Draw(void) glVertex2d(1.0, 0.0); glEnd(); + glBegin(GL_QUADS); + glVertex2d(0.0, 0.0); + glVertex2d(0.0, -1.0); + glVertex2d(1.0, -1.0); + glVertex2d(1.0, 0.0); + glEnd(); + glEnable(GL_SCISSOR_TEST); glClearColor(1, 1, 0, 0); glScissor(Width / 2, 0, Width - Width / 2, Height / 2); -- cgit v1.2.3