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-rw-r--r--progs/tests/getteximage.c114
1 files changed, 103 insertions, 11 deletions
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 <stdio.h>
#include <stdlib.h>
#include <math.h>
+#include <GL/glew.h>
#include <GL/glut.h>
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;
@@ -47,24 +53,112 @@ 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)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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);