[Piglit] [PATCH] arb_texture_float-get-tex3d: test glGetTexImage with 3D float texture

[Brian Paul]

This hits a format conversion path in Mesa's glGetTexImage code which
hits a bug.
---
 tests/all.py                                   |   1 +
 tests/spec/arb_texture_float/CMakeLists.gl.txt |   1 +
 tests/spec/arb_texture_float/get-tex3d.c       | 110 +++++++++++++++++++++++++
 3 files changed, 112 insertions(+)
 create mode 100644 tests/spec/arb_texture_float/get-tex3d.c

diff --git a/tests/all.py b/tests/all.py
index 1c77b47..4f6117a 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3236,6 +3236,7 @@ with profile.group_manager(
         PiglitGLTest,
         grouptools.join('spec', 'arb_texture_float')) as g:
     g(['arb_texture_float-texture-float-formats'], run_concurrent=False)
+    g(['arb_texture_float-get-tex3d'], run_concurrent=False)
     add_msaa_formats_tests(g, 'GL_ARB_texture_float')
     add_texwrap_format_tests(g, 'GL_ARB_texture_float')
     add_fbo_formats_tests(g, 'GL_ARB_texture_float')
diff --git a/tests/spec/arb_texture_float/CMakeLists.gl.txt b/tests/spec/arb_texture_float/CMakeLists.gl.txt
index 80090b0..c1a6fca 100644
--- a/tests/spec/arb_texture_float/CMakeLists.gl.txt
+++ b/tests/spec/arb_texture_float/CMakeLists.gl.txt
@@ -9,5 +9,6 @@ link_libraries (
 )
 
 piglit_add_executable (arb_texture_float-texture-float-formats texture-float-formats.c)
+piglit_add_executable (arb_texture_float-get-tex3d get-tex3d.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_texture_float/get-tex3d.c b/tests/spec/arb_texture_float/get-tex3d.c
new file mode 100644
index 0000000..68c9504
--- /dev/null
+++ b/tests/spec/arb_texture_float/get-tex3d.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2016 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL VMWARE AND/OR THEIR SUPPLIERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+/**
+ * Tests glGetTexImage() with float format.
+ * This hits a rare pixel transfer patch in Mesa.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+	config.supports_gl_compat_version = 10;
+	config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+enum piglit_result
+piglit_display(void)
+{
+	/* should not called */
+	return PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+   GLuint texture;
+   const unsigned w = 16, h = 8, d = 4;
+   unsigned i;
+   float *texData;
+   bool pass = true;
+
+   piglit_require_extension("GL_ARB_texture_float");
+
+   glGenTextures(1, &texture);
+   glBindTexture(GL_TEXTURE_3D, texture);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   /* Define 3D texture with float values */
+   texData = malloc(4 * w * h * d * sizeof(float));
+   for (i = 0; i < w * h * d * 4; i++) {
+	   texData[i] = (rand() & 0xff) / 255.0f;
+   }
+   glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F, w, h, d, 0,
+		GL_RGBA, GL_FLOAT, texData);
+
+   /* Get 3D texture as GLfloat (no transfer ops) */
+   {
+      GLfloat *getData = malloc(4 * w * h * d * sizeof(GLfloat));
+      glGetTexImage(GL_TEXTURE_3D, 0, GL_RGBA, GL_FLOAT, getData);
+      for (i = 0; i < w * h * d * 4; i++) {
+	      GLfloat expected = texData[i];
+	      if (getData[i] != expected) {
+		      printf("Expected float value %f, found %f at %u\n",
+			     expected, getData[i], i);
+		      pass = false;
+		      break;
+	      }
+      }
+
+      free(getData);
+   }
+
+   /* Get 3D texture as GLubyte */
+   {
+      GLubyte *getData = malloc(4 * w * h * d * sizeof(GLubyte));
+      glGetTexImage(GL_TEXTURE_3D, 0, GL_RGBA, GL_UNSIGNED_BYTE, getData);
+      for (i = 0; i < w * h * d * 4; i++) {
+	      GLubyte expected = (GLubyte) (texData[i] * 255);
+	      if (getData[i] != expected) {
+		      printf("Expected ubyte value %u, found %u at %u\n",
+			     expected, getData[i], i);
+		      pass = false;
+		      break;
+	      }
+      }
+
+      free(getData);
+   }
+
+   free(texData);
+
+   glDeleteTextures(1, &texture);
+
+   piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
-- 
1.9.1