ext_packed_depth_stencil/readpixels-24_8: New test for packed fbo readpixels.

The existing glean test only covers window system framebuffers, not an
actual packed depth/stencil FBO like this.

3 files changed, 180 insertions, 0 deletions

diff --git a/tests/spec/ext_packed_depth_stencil/CMakeLists.gl.txt b/tests/spec/ext_packed_depth_stencil/CMakeLists.gl.txt
new file mode 100644
index 000000000..7fd1cc12c
--- /dev/null
+++ b/tests/spec/ext_packed_depth_stencil/CMakeLists.gl.txt
@@ -0,0 +1,17 @@
+include_directories(
+	${GLEXT_INCLUDE_DIR}
+	${OPENGL_INCLUDE_PATH}
+	${GLUT_INCLUDE_DIR}
+	${piglit_SOURCE_DIR}/tests/util
+)
+
+link_libraries (
+	piglitutil
+	${OPENGL_gl_LIBRARY}
+	${OPENGL_glu_LIBRARY}
+	${GLUT_glut_LIBRARY}
+)
+
+add_executable (ext_packed_depth_stencil-readpixels-24_8 readpixels-24_8.c)
+
+# vim: ft=cmake:
diff --git a/tests/spec/ext_packed_depth_stencil/CMakeLists.txt b/tests/spec/ext_packed_depth_stencil/CMakeLists.txt
new file mode 100644
index 000000000..144a306f4
--- /dev/null
+++ b/tests/spec/ext_packed_depth_stencil/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/ext_packed_depth_stencil/readpixels-24_8.c b/tests/spec/ext_packed_depth_stencil/readpixels-24_8.c
new file mode 100644
index 000000000..2e8c7a8da
--- /dev/null
+++ b/tests/spec/ext_packed_depth_stencil/readpixels-24_8.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+/** @file fbo-readpixels-depth-formats.c
+ *
+ * Tests that various formats of depth renderbuffers can be read
+ * correctly using glReadPixels() with various format/type
+ * combinations.
+ */
+
+#include "piglit-util.h"
+
+#define BUF_WIDTH 15
+#define BUF_HEIGHT 15
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA;
+int piglit_width = BUF_WIDTH;
+int piglit_height = BUF_WIDTH;
+
+/* Width of our stripes of z = 0.0, 0.5, 1.0 */
+static int w = BUF_WIDTH / 3;
+
+int depth_bits;
+
+static bool
+test_pixel(int x, int y, uint32_t value)
+{
+	uint32_t expected;
+
+	if (x < w)
+		expected = 0x00000000;
+	else if (x < w * 2)
+		expected = 0x80000001;
+	else
+		expected = 0xffffff02;
+
+	if (value - expected != 0) {
+		fprintf(stderr,
+			"Expected 0x%08x at (%d,%d), found 0x%08x\n",
+			expected, x, y, value);
+		return false;
+	}
+
+	return true;
+}
+
+static bool
+test()
+{
+	GLuint tex, fb;
+	GLenum status;
+	bool pass = true;
+	uint32_t values[BUF_WIDTH * BUF_HEIGHT];
+	int x, y;
+
+	glGenFramebuffersEXT(1, &fb);
+	glBindFramebufferEXT(GL_FRAMEBUFFER, fb);
+	assert(glGetError() == 0);
+
+	glGenTexturesEXT(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8,
+		     BUF_WIDTH, BUF_HEIGHT, 0,
+		     GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+				  GL_DEPTH_ATTACHMENT_EXT,
+				  GL_TEXTURE_2D,
+				  tex,
+				  0);
+	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+				  GL_STENCIL_ATTACHMENT_EXT,
+				  GL_TEXTURE_2D,
+				  tex,
+				  0);
+
+	glDrawBuffer(GL_NONE);
+	glReadBuffer(GL_NONE);
+
+	status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER);
+	if (status != GL_FRAMEBUFFER_COMPLETE) {
+		fprintf(stderr, "framebuffer incomplete\n");
+		goto done;
+	}
+
+	glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
+
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_ALWAYS);
+
+	glEnable(GL_STENCIL_TEST);
+	glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
+
+	glViewport(0, 0, BUF_WIDTH, BUF_HEIGHT);
+	piglit_ortho_projection(BUF_WIDTH, BUF_HEIGHT, false);
+	glStencilFunc(GL_ALWAYS, 0, ~0);
+	piglit_draw_rect_z(1.0, 0,     0, w,     BUF_HEIGHT);
+	glStencilFunc(GL_ALWAYS, 1, ~0);
+	piglit_draw_rect_z(0.0, w,     0, w * 2, BUF_HEIGHT);
+	glStencilFunc(GL_ALWAYS, 2, ~0);
+	piglit_draw_rect_z(-1.0, w * 2, 0, w * 3, BUF_HEIGHT);
+
+	glReadPixels(0, 0, BUF_WIDTH, BUF_HEIGHT,
+		     GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, values);
+
+	for (y = 0; y < BUF_HEIGHT; y++) {
+		for (x = 0; x < BUF_WIDTH; x++) {
+			if (!test_pixel(x, y, values[y * BUF_WIDTH + x])) {
+				pass = false;
+				break;
+			}
+		}
+		if (x != BUF_WIDTH)
+			break;
+
+	}
+
+done:
+	glDeleteFramebuffersEXT(1, &fb);
+	glDeleteTextures(1, &tex);
+	return pass;
+}
+
+void piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+
+	piglit_require_extension("GL_EXT_framebuffer_object");
+	piglit_require_extension("GL_EXT_packed_depth_stencil");
+
+	pass = test();
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	/* UNREACHED */
+	return PIGLIT_FAIL;
+}