Zero-sized tex images and sub images should not generate an error.
Full images which are not multiples of the block size should also be legal.
Verified w/ NVIDIA's driver.
---
tests/texturing/s3tc-errors.c | 38 ++++++++++++++++++++++++++++++++++++++
1 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/tests/texturing/s3tc-errors.c b/tests/texturing/s3tc-errors.c
index 8a6546d..b4b6776 100644
--- a/tests/texturing/s3tc-errors.c
+++ b/tests/texturing/s3tc-errors.c
@@ -273,6 +273,23 @@ test_format(int width, int height, GLfloat *image, GLenum
format)
pass = piglit_check_gl_error(GL_INVALID_OPERATION) && pass;
+ /* Try zero-sized subimage - should not be an error */
+ x = 4;
+ y = 4;
+ w = 0;
+ h = 0;
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, x);
+ glPixelStorei(GL_UNPACK_SKIP_ROWS, y);
+ glCompressedTexSubImage2D(GL_TEXTURE_2D, 0,
+ x, y, w, h,
+ format,
+ piglit_compressed_image_size(format, w, h),
+ compressed_image +
+ piglit_compressed_pixel_offset(format, width,
x, y));
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+
/* Try CompressedTexSubImage into level 1 (which is missing) */
x = 0;
y = 0;
@@ -289,6 +306,27 @@ test_format(int width, int height, GLfloat *image, GLenum
format)
pass = piglit_check_gl_error(GL_INVALID_OPERATION) && pass;
+ /* Try CompressedTexImage of size zero - should not be an erorr */
+ w = 0;
+ h = 0;
+ glCompressedTexImage2D(GL_TEXTURE_2D, 0, format, w, h, 0,
+ piglit_compressed_image_size(format, w, h),
+ compressed_image);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ /* Try CompressedTexImage with size which is a not a multiple of the
+ * block size - should not be an erorr
+ */
+ w = width - 1;
+ h = height - 1;
+ glCompressedTexImage2D(GL_TEXTURE_2D, 0, format, w, h, 0,
+ piglit_compressed_image_size(format, w, h),
+ compressed_image);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+ pass = check_rendering(width, height) && pass;
+
glDeleteTextures(1, &tex);
free(compressed_image);
--
1.7.3.4
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