From 139f2ddde4fcfdaa7d8bbb86e946274be3733e71 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 9 Jun 2009 14:03:25 -0600 Subject: tests: quick and dirty glGetTexImage() test program --- progs/tests/getteximage.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 progs/tests/getteximage.c (limited to 'progs/tests/getteximage.c') diff --git a/progs/tests/getteximage.c b/progs/tests/getteximage.c new file mode 100644 index 0000000000..c8705d5052 --- /dev/null +++ b/progs/tests/getteximage.c @@ -0,0 +1,123 @@ +/** + * Test glGetTexImage() + * Brian Paul + * 9 June 2009 + */ + + +#include +#include +#include +#include + +static int Win; + + +static void +TestGetTexImage(void) +{ + GLuint iter; + + for (iter = 0; iter < 20; iter++) { + GLint p = (iter % 6) + 4; + GLint w = (1 << p); + GLint h = (1 << p); + GLubyte data[512*512*4]; + GLubyte data2[512*512*4]; + GLuint i; + GLint level = 0; + + printf("Testing %d x %d tex image\n", w, h); + /* fill data */ + for (i = 0; i < w * h * 4; i++) { + data[i] = i & 0xff; + data2[i] = 0; + } + + glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w, h, 0, + GL_RGBA, GL_UNSIGNED_BYTE, data); + + glBegin(GL_POINTS); + glVertex2f(0, 0); + glEnd(); + + /* get */ + glGetTexImage(GL_TEXTURE_2D, level, GL_RGBA, GL_UNSIGNED_BYTE, data2); + + /* compare */ + for (i = 0; i < w * h * 4; i++) { + if (data2[i] != data[i]) { + printf("Failure!\n"); + abort(); + } + } + } + printf("Passed\n"); + glutDestroyWindow(Win); + exit(0); +} + + +static void +Draw(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + TestGetTexImage(); + + glutSwapBuffers(); +} + + +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, 5.0, 25.0); + 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: + glutDestroyWindow(Win); + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void +Init(void) +{ + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glEnable(GL_TEXTURE_2D); +} + + +int +main(int argc, char *argv[]) +{ + glutInit(&argc, argv); + glutInitWindowPosition(0, 0); + glutInitWindowSize(400, 400); + glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); + Win = glutCreateWindow(argv[0]); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutDisplayFunc(Draw); + Init(); + glutMainLoop(); + return 0; +} -- cgit v1.2.3 From 073c20befa28177cf1276bfb8c75f6638d588580 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 9 Jun 2009 15:05:36 -0600 Subject: tests: also test glGetTexImage with render to texture Also, adjust texture dims for the original test. And use GLEW. --- progs/tests/getteximage.c | 114 +++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 103 insertions(+), 11 deletions(-) (limited to 'progs/tests/getteximage.c') diff --git a/progs/tests/getteximage.c b/progs/tests/getteximage.c index c8705d5052..f0160f5863 100644 --- a/progs/tests/getteximage.c +++ b/progs/tests/getteximage.c @@ -8,6 +8,7 @@ #include #include #include +#include #include static int Win; @@ -17,17 +18,22 @@ static void TestGetTexImage(void) { GLuint iter; + GLubyte *data = (GLubyte *) malloc(1024 * 1024 * 4); + GLubyte *data2 = (GLubyte *) malloc(1024 * 1024 * 4); - for (iter = 0; iter < 20; iter++) { - GLint p = (iter % 6) + 4; + glEnable(GL_TEXTURE_2D); + + printf("glTexImage2D + glGetTexImage:\n"); + + for (iter = 0; iter < 8; iter++) { + GLint p = (iter % 8) + 3; GLint w = (1 << p); GLint h = (1 << p); - GLubyte data[512*512*4]; - GLubyte data2[512*512*4]; GLuint i; GLint level = 0; - printf("Testing %d x %d tex image\n", w, h); + printf(" Testing %d x %d tex image\n", w, h); + /* fill data */ for (i = 0; i < w * h * 4; i++) { data[i] = i & 0xff; @@ -47,17 +53,100 @@ TestGetTexImage(void) /* compare */ for (i = 0; i < w * h * 4; i++) { if (data2[i] != data[i]) { - printf("Failure!\n"); + printf("glTexImage + glGetTexImage failure!\n"); + printf("Expected value %d, found %d\n", data[i], data2[i]); abort(); } } } + printf("Passed\n"); - glutDestroyWindow(Win); - exit(0); + glDisable(GL_TEXTURE_2D); + free(data); + free(data2); +} + + +static GLboolean +ColorsEqual(const GLubyte ref[4], const GLubyte act[4]) +{ + if (abs((int) ref[0] - (int) act[0]) > 1 || + abs((int) ref[1] - (int) act[1]) > 1 || + abs((int) ref[2] - (int) act[2]) > 1 || + abs((int) ref[3] - (int) act[3]) > 1) { + printf("expected %d %d %d %d\n", ref[0], ref[1], ref[2], ref[3]); + printf("found %d %d %d %d\n", act[0], act[1], act[2], act[3]); + return GL_FALSE; + } + return GL_TRUE; } +static void +TestGetTexImageRTT(void) +{ + GLuint iter; + GLuint fb, tex; + GLint w = 512; + GLint h = 256; + GLint level = 0; + + glGenTextures(1, &tex); + glGenFramebuffersEXT(1, &fb); + + glBindTexture(GL_TEXTURE_2D, tex); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + + glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, tex, level); + + printf("Render to texture + glGetTexImage:\n"); + printf(" Testing %d x %d tex image\n", w, h); + for (iter = 0; iter < 8; iter++) { + GLubyte color[4]; + GLubyte *data2 = (GLubyte *) malloc(w * h * 4); + GLuint i; + + /* random clear color */ + for (i = 0; i < 4; i++) { + color[i] = rand() % 256; + } + + glClearColor(color[0] / 255.0, + color[1] / 255.0, + color[2] / 255.0, + color[3] / 255.0); + + glClear(GL_COLOR_BUFFER_BIT); + + /* get */ + glGetTexImage(GL_TEXTURE_2D, level, GL_RGBA, GL_UNSIGNED_BYTE, data2); + + /* compare */ + for (i = 0; i < w * h; i += 4) { + if (!ColorsEqual(color, data2 + i * 4)) { + printf("Render to texture failure!\n"); + abort(); + } + } + + free(data2); + } + + glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0); + glDeleteFramebuffersEXT(1, &fb); + glDeleteTextures(1, &tex); + + printf("Passed\n"); +} + + + + static void Draw(void) { @@ -65,6 +154,11 @@ Draw(void) TestGetTexImage(); + TestGetTexImageRTT(); + + glutDestroyWindow(Win); + exit(0); + glutSwapBuffers(); } @@ -100,9 +194,6 @@ Key(unsigned char key, int x, int y) static void Init(void) { - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glEnable(GL_TEXTURE_2D); } @@ -114,6 +205,7 @@ main(int argc, char *argv[]) glutInitWindowSize(400, 400); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); Win = glutCreateWindow(argv[0]); + glewInit(); glutReshapeFunc(Reshape); glutKeyboardFunc(Key); glutDisplayFunc(Draw); -- cgit v1.2.3 From 29c79a03a42365b4bf828c81ab8676e3e42cfbaf Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 9 Jun 2009 15:06:41 -0600 Subject: tests: check for GL_EXT/ARB_framebuffer_object --- progs/tests/getteximage.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'progs/tests/getteximage.c') diff --git a/progs/tests/getteximage.c b/progs/tests/getteximage.c index f0160f5863..e4818a8fab 100644 --- a/progs/tests/getteximage.c +++ b/progs/tests/getteximage.c @@ -154,7 +154,9 @@ Draw(void) TestGetTexImage(); - TestGetTexImageRTT(); + if (glutExtensionSupported("GL_EXT_framebuffer_object") || + glutExtensionSupported("GL_ARB_framebuffer_object")) + TestGetTexImageRTT(); glutDestroyWindow(Win); exit(0); -- cgit v1.2.3