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tests: also test xoffset in texcompsub test

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use glCompressedTexSubImage2DARB also with xoffset by splitting into 3 calls
in total. Dunno if the top/bottom reversal is intentional but leave as is.
This commit is contained in:
Roland Scheidegger
2009-08-05 00:57:08 +02:00
parent de80eeea0e
commit 0abc9e7565
1 changed files with 19 additions and 3 deletions
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22
progs/tests/texcompsub.c
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@@ -6,6 +6,7 @@
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <GL/glew.h>
#include <GL/glut.h>
@@ -31,6 +32,8 @@ CheckError(int line)
static void
LoadCompressedImage(void)
{
unsigned char ImgDataTemp[ImgSize / 4];
unsigned i;
const GLenum filter = GL_LINEAR;
glTexImage2D(Target, 0, CompFormat, ImgWidth, ImgHeight, 0,
GL_RGB, GL_UNSIGNED_BYTE, NULL);
@@ -40,11 +43,24 @@ LoadCompressedImage(void)
0, 0, /* pos */
ImgWidth, ImgHeight / 2,
CompFormat, ImgSize / 2, ImgData + ImgSize / 2);
/* top half */
/* top left */
for (i = 0; i < ImgHeight / 8; i++) {
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[i * 2 * ImgWidth], ImgWidth);
}
glCompressedTexSubImage2DARB(Target, 0,
0, ImgHeight / 2, /* pos */
ImgWidth, ImgHeight / 2,
CompFormat, ImgSize / 2, ImgData);
ImgWidth / 2, ImgHeight / 2,
CompFormat, ImgSize / 4, ImgDataTemp);
/* top right */
for (i = 0; i < ImgHeight / 8; i++) {
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[i * 2 * ImgWidth + ImgWidth], ImgWidth);
}
glCompressedTexSubImage2DARB(Target, 0,
ImgWidth / 2, ImgHeight / 2, /* pos */
ImgWidth / 2, ImgHeight / 2,
CompFormat, ImgSize / 4, ImgDataTemp);
glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, filter);
glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, filter);