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Diffstat (limited to 'progs/tests/getteximage.c')
| -rw-r--r-- | progs/tests/getteximage.c | 273 |
1 files changed, 0 insertions, 273 deletions
diff --git a/progs/tests/getteximage.c b/progs/tests/getteximage.c deleted file mode 100644 index e4053b8de1..0000000000 --- a/progs/tests/getteximage.c +++ /dev/null @@ -1,273 +0,0 @@ -/** - * Test glGetTexImage() - * Brian Paul - * 9 June 2009 - */ - - -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> - -static int Win; - - -static void -TestGetTexImage(GLboolean npot) -{ - GLuint iter; - GLubyte *data = (GLubyte *) malloc(1024 * 1024 * 4); - GLubyte *data2 = (GLubyte *) malloc(1024 * 1024 * 4); - - glEnable(GL_TEXTURE_2D); - - printf("glTexImage2D + glGetTexImage:\n"); - - for (iter = 0; iter < 8; iter++) { - GLint p = (iter % 8) + 3; - GLint w = npot ? (p * 20) : (1 << p); - GLint h = npot ? (p * 10) : (1 << p); - 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("glTexImage + glGetTexImage failure!\n"); - printf("Expected value %d, found %d\n", data[i], data2[i]); - abort(); - } - } - - /* get as BGRA */ - glGetTexImage(GL_TEXTURE_2D, level, GL_BGRA, GL_UNSIGNED_BYTE, data2); - - /* compare */ - { - const GLubyte *rgba = (GLubyte *) data; - const GLubyte *bgra = (GLubyte *) data2; - for (i = 0; i < w * h; i += 4) { - if (rgba[i+0] != bgra[i+2] || - rgba[i+1] != bgra[i+1] || - rgba[i+2] != bgra[i+0] || - rgba[i+3] != bgra[i+3]) { - printf("glTexImage + glGetTexImage(GL_BGRA) failure!\n"); - printf("Expected value %d, found %d\n", data[i], data2[i]); - abort(); - } - } - } - - } - - printf("Passed\n"); - 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(GLboolean npot) -{ - GLuint iter; - - printf("Render to texture + glGetTexImage:\n"); - - for (iter = 0; iter < 8; iter++) { - - GLuint fb, tex; - GLint w, h; - GLint level = 0; - - if (npot) { - w = 200 + iter * 40; - h = 200 + iter * 12; - } - else { - w = 4 << iter; - h = 4 << iter; - } - - 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); - - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb); - glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, - GL_TEXTURE_2D, tex, level); - - glViewport(0, 0, w, h); - - printf(" Testing %d x %d tex image\n", w, h); - { - static const GLubyte blue[4] = {0, 0, 255, 255}; - 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); - - /* draw polygon over top half, in blue */ - glColor4ubv(blue); - glRectf(0, 0.5, 1.0, 1.0); - - /* get */ - glGetTexImage(GL_TEXTURE_2D, level, GL_RGBA, GL_UNSIGNED_BYTE, data2); - - /* compare */ - for (i = 0; i < w * h; i += 4) { - if (i < w * h / 2) { - /* lower half */ - if (!ColorsEqual(color, data2 + i * 4)) { - printf("Render to texture failure (expected clear color)!\n"); - abort(); - } - } - else { - /* upper half */ - if (!ColorsEqual(blue, data2 + i * 4)) { - printf("Render to texture failure (expected blue)!\n"); - abort(); - } - } - } - - free(data2); - } - - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); - glDeleteFramebuffersEXT(1, &fb); - glDeleteTextures(1, &tex); - - } - - printf("Passed\n"); -} - - - - -static void -Draw(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - TestGetTexImage(GL_FALSE); - if (glutExtensionSupported("GL_ARB_texture_non_power_of_two")) - TestGetTexImage(GL_TRUE); - - if (glutExtensionSupported("GL_EXT_framebuffer_object") || - glutExtensionSupported("GL_ARB_framebuffer_object")) { - TestGetTexImageRTT(GL_FALSE); - if (glutExtensionSupported("GL_ARB_texture_non_power_of_two")) - TestGetTexImageRTT(GL_TRUE); - } - - glutDestroyWindow(Win); - exit(0); - - glutSwapBuffers(); -} - - -static void -Reshape(int width, int height) -{ - glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(0, 1, 0, 1, -1, 1); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0, 0.0, 0.0); -} - - -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) -{ -} - - -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]); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Draw); - Init(); - glutMainLoop(); - return 0; -} |