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tests/getteximage: test more texture sizes, including npot

This commit is contained in:
Brian Paul 2009-08-04 16:17:09 -06:00
parent a746ef28df
commit cd7a8225e8
1 changed files with 86 additions and 50 deletions
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136
progs/tests/getteximage.c
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@ -15,7 +15,7 @@ static int Win;
static void
TestGetTexImage(void)
TestGetTexImage(GLboolean npot)
{
GLuint iter;
GLubyte *data = (GLubyte *) malloc(1024 * 1024 * 4);
@ -27,8 +27,8 @@ TestGetTexImage(void)
for (iter = 0; iter < 8; iter++) {
GLint p = (iter % 8) + 3;
GLint w = (1 << p);
GLint h = (1 << p);
GLint w = npot ? (p * 20) : (1 << p);
GLint h = npot ? (p * 10) : (1 << p);
GLuint i;
GLint level = 0;
@ -83,63 +83,94 @@ ColorsEqual(const GLubyte ref[4], const GLubyte act[4])
static void
TestGetTexImageRTT(void)
TestGetTexImageRTT(GLboolean npot)
{
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);
glBindFramebufferEXT(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;
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;
}
glClearColor(color[0] / 255.0,
color[1] / 255.0,
color[2] / 255.0,
color[3] / 255.0);
glGenTextures(1, &tex);
glGenFramebuffersEXT(1, &fb);
glClear(GL_COLOR_BUFFER_BIT);
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);
/* get */
glGetTexImage(GL_TEXTURE_2D, level, GL_RGBA, GL_UNSIGNED_BYTE, data2);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, tex, level);
/* compare */
for (i = 0; i < w * h; i += 4) {
if (!ColorsEqual(color, data2 + i * 4)) {
printf("Render to texture failure!\n");
abort();
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);
}
free(data2);
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &fb);
glDeleteTextures(1, &tex);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &fb);
glDeleteTextures(1, &tex);
}
printf("Passed\n");
}
@ -152,11 +183,16 @@ Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
TestGetTexImage();
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();
glutExtensionSupported("GL_ARB_framebuffer_object")) {
TestGetTexImageRTT(GL_FALSE);
if (glutExtensionSupported("GL_ARB_texture_non_power_of_two"))
TestGetTexImageRTT(GL_TRUE);
}
glutDestroyWindow(Win);
exit(0);
@ -171,10 +207,10 @@ 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);
glOrtho(0, 1, 0, 1, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -15.0);
glTranslatef(0.0, 0.0, 0.0);
}