arb_texture_view: verify that 2darray can be sampled as cube

Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

3 files changed, 117 insertions, 0 deletions

diff --git a/tests/all.py b/tests/all.py
index 33b1e2841..467247bf4 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -2205,6 +2205,7 @@ arb_texture_view['clear-into-view-2d'] = concurrent_test('arb_texture_view-clear
 arb_texture_view['clear-into-view-2d-array'] = concurrent_test('arb_texture_view-clear-into-view-2d-array')
 arb_texture_view['clear-into-view-layered'] = concurrent_test('arb_texture_view-clear-into-view-layered')
 arb_texture_view['copytexsubimage-layers'] = concurrent_test('arb_texture_view-copytexsubimage-layers')
+arb_texture_view['sampling-2d-array-as-cubemap'] = concurrent_test('arb_texture_view-sampling-2d-array-as-cubemap')
 
 tdfx_texture_compression_fxt1 = {}
 spec['3DFX_texture_compression_FXT1'] = tdfx_texture_compression_fxt1
diff --git a/tests/spec/arb_texture_view/CMakeLists.gl.txt b/tests/spec/arb_texture_view/CMakeLists.gl.txt
index f93970792..293c8d6d8 100644
--- a/tests/spec/arb_texture_view/CMakeLists.gl.txt
+++ b/tests/spec/arb_texture_view/CMakeLists.gl.txt
@@ -26,5 +26,6 @@ piglit_add_executable(arb_texture_view-clear-into-view-2d-array clear-into-view-
 piglit_add_executable(arb_texture_view-clear-into-view-layered clear-into-view-layered.c common.c)
 piglit_add_executable(arb_texture_view-rendering-formats rendering-formats.c)
 piglit_add_executable(arb_texture_view-copytexsubimage-layers copytexsubimage-layers.c common.c)
+piglit_add_executable(arb_texture_view-sampling-2d-array-as-cubemap sampling-2d-array-as-cubemap.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_texture_view/sampling-2d-array-as-cubemap.c b/tests/spec/arb_texture_view/sampling-2d-array-as-cubemap.c
new file mode 100644
index 000000000..2366d0c7a
--- /dev/null
+++ b/tests/spec/arb_texture_view/sampling-2d-array-as-cubemap.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright © 2014 Ilia Mirkin
+ *
+ * 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.
+ *
+ * Author: Ilia Mirkin <imirkin@alum.mit.edu>
+ */
+
+/**
+ * \file sampling-2d-array-as-cubemap.c
+ * This tests that you can cast from a 2D Array texture to a Cubemap
+ * texture and sample from the Cubemap view.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 30;
+	config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static float green[] = {0, 1, 0, 1};
+static float red[] = {1, 0, 0, 1};
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass;
+
+	glViewport(0, 0, piglit_width, piglit_height);
+	glClearColor(0.5, 0.5, 0.5, 0.5);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	piglit_draw_rect(-1, -1, 2, 2);
+
+	pass = piglit_probe_rect_rgba(-1, -1, 2, 2, green);
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	char *vsCode;
+	char *fsCode;
+	int tex_loc_cube, prog_cube, l;
+	GLuint tex_2DArray, tex_Cube;
+
+	piglit_require_extension("GL_ARB_texture_view");
+
+	/* setup shaders and program object for Cube rendering */
+	asprintf(&vsCode,
+		 "void main()\n"
+		 "{\n"
+		 "    gl_Position = gl_Vertex;\n"
+		 "}\n");
+	asprintf(&fsCode,
+		 "uniform samplerCube tex;\n"
+		 "void main()\n"
+		 "{\n"
+		 "   vec4 color	= textureCube(tex, vec3(-1, 0, 0));\n"
+		 "   gl_FragColor = vec4(color.xyz, 1.0);\n"
+		 "}\n");
+	prog_cube = piglit_build_simple_program(vsCode, fsCode);
+	free(fsCode);
+	free(vsCode);
+	tex_loc_cube = glGetUniformLocation(prog_cube, "tex");
+
+	glGenTextures(1, &tex_2DArray);
+	glBindTexture(GL_TEXTURE_2D_ARRAY, tex_2DArray);
+
+	glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, 1, 1, 8);
+
+	/* load each array layer with red */
+	for (l = 0; l < 8; l++) {
+		glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, l,
+				1, 1, 1, GL_RGBA, GL_FLOAT, red);
+	}
+	/* make array layer 3 have green */
+	glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 3,
+			1, 1, 1, GL_RGBA, GL_FLOAT, green);
+
+	glGenTextures(1, &tex_Cube);
+	/* the texture view starts at layer 2, so face 1 (-X) will have green */
+	glTextureView(tex_Cube, GL_TEXTURE_CUBE_MAP, tex_2DArray, GL_RGBA8,
+		      0, 1, 2, 6);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+	glBindTexture(GL_TEXTURE_CUBE_MAP, tex_Cube);
+
+	glUseProgram(prog_cube);
+	glUniform1i(tex_loc_cube, 0);
+}