I missed the language in section 3.8.7 about depth texture sampling.
Thanks, Marek.
---
tests/spec/gl-3.2/depth-tex-sampling.c | 28 +++++++++++-----------------
1 file changed, 11 insertions(+), 17 deletions(-)
diff --git a/tests/spec/gl-3.2/depth-tex-sampling.c
b/tests/spec/gl-3.2/depth-tex-sampling.c
index 7d2988c..32079c1 100644
--- a/tests/spec/gl-3.2/depth-tex-sampling.c
+++ b/tests/spec/gl-3.2/depth-tex-sampling.c
@@ -22,18 +22,12 @@
*/
/*
- * In the GL 3.2 core profile, GL_DEPTH_TEXTURE_MODE is deprecated.
- * Sampling a depth texture should always return (d, d, d, 1) which
- * corresponds to the legacy GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE.
+ * The section 3.8.7 (page 160) of the GL 3.2 core specification says:
*
- * NVIDIA's driver, however, seems to return (d, 0, 0, 1).
- *
- * From the OpenGL 3.2 specification, page 332:
- * "Depth texture mode - DEPTH_TEXTURE_MODE. Section 3.8.15 is to be
- * changed so that r is returned to texture samplers directly, and
- * the OpenGL Shading Language 1.30 Specification is to be changed
- * so that (r,r,r,1) is always returned from depth texture samplers
- * in this case."
+ * "Depth textures and the depth components of depth/stencil textures can
+ * be treated as RED textures during texture filtering and application
+ * (see section 3.8.15). The initial state for depth and depth/stencil
+ * textures treats them as RED textures."
*
* Brian Paul
* 5 Dec 2013
@@ -181,14 +175,14 @@ enum piglit_result
piglit_display(void)
{
static const float black[4] = { 0.0, 0.0, 0.0, 1.0 };
- static const float white[4] = { 1.0, 1.0, 1.0, 1.0 };
- static const float gray[4] = { 0.5, 0.5, 0.5, 1.0 };
+ static const float red50[4] = { 0.5, 0.0, 0.0, 1.0 };
+ static const float red100[4] = { 1.0, 0.0, 0.0, 1.0 };
bool pass = true;
glViewport(0, 0, piglit_width, piglit_height);
- /* This should draw a grayscale gradient ranging from black
- * at the bottom of the window to white at the top.
+ /* This should draw a red gradient ranging from black
+ * at the bottom of the window to full red at the top.
*/
glClearColor(0.2, 0.2, 0.8, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
@@ -197,10 +191,10 @@ piglit_display(void)
if (!piglit_probe_pixel_rgba(0, 0, black))
pass = false;
- if (!piglit_probe_pixel_rgba(0, piglit_height/2, gray))
+ if (!piglit_probe_pixel_rgba(0, piglit_height/2, red50))
pass = false;
- if (!piglit_probe_pixel_rgba(0, piglit_height-1, white))
+ if (!piglit_probe_pixel_rgba(0, piglit_height-1, red100))
pass = false;
piglit_present_results();
--
1.7.10.4
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