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progs/tests: fix sub texture offsets

This commit is contained in:
Brian Paul 2009-10-24 11:08:01 -06:00
parent bee6794eb1
commit 51bc12d623
1 changed files with 5 additions and 3 deletions
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8
progs/tests/texcompsub.c
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@ -35,6 +35,8 @@ LoadCompressedImage(void)
unsigned char ImgDataTemp[ImgSize / 4];
unsigned i;
const GLenum filter = GL_LINEAR;
const int half = ImgSize / 2;
glTexImage2D(Target, 0, CompFormat, ImgWidth, ImgHeight, 0,
GL_RGB, GL_UNSIGNED_BYTE, NULL);
@ -42,11 +44,11 @@ LoadCompressedImage(void)
glCompressedTexSubImage2DARB(Target, 0,
0, 0, /* pos */
ImgWidth, ImgHeight / 2,
CompFormat, ImgSize / 2, ImgData + ImgSize / 2);
CompFormat, ImgSize / 2, ImgData /*+ ImgSize / 2*/);
/* top left */
for (i = 0; i < ImgHeight / 8; i++) {
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[i * 2 * ImgWidth], ImgWidth);
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[half + i * 2 * ImgWidth], ImgWidth);
}
glCompressedTexSubImage2DARB(Target, 0,
0, ImgHeight / 2, /* pos */
@ -55,7 +57,7 @@ LoadCompressedImage(void)
/* top right */
for (i = 0; i < ImgHeight / 8; i++) {
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[i * 2 * ImgWidth + ImgWidth], ImgWidth);
memcpy(&ImgDataTemp[i * ImgWidth], &ImgData[half + i * 2 * ImgWidth + ImgWidth], ImgWidth);
}
glCompressedTexSubImage2DARB(Target, 0,
ImgWidth / 2, ImgHeight / 2, /* pos */