+++ /dev/null
-/**
- * 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;
-}
projects / mesa.git / blobdiff