GL 3.2 allows different framebuffer attachments to have different
layer counts. Rendering to layers that do not exist in all
attachments is undefined; however, clearing the framebuffer should
still clear all layers of all attachments.
---
tests/all.tests | 1 +
.../gl-3.2/layered-rendering/CMakeLists.gl.txt | 1 +
.../clear-color-mismatched-layer-count.c | 187 +++++++++++++++++++++
3 files changed, 189 insertions(+)
create mode 100644
tests/spec/gl-3.2/layered-rendering/clear-color-mismatched-layer-count.c
diff --git a/tests/all.tests b/tests/all.tests
index edf066b..2dcfb77 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -748,6 +748,7 @@ for texture_type in ['3d', '2d_array',
'2d_multisample_array', '1d_array',
texture_type, test_type)
spec['!OpenGL 3.2/layered-rendering/' + cmdline] = \
concurrent_test('gl-3.2-layered-rendering-' + cmdline)
+spec['!OpenGL 3.2/layered-rendering/clear-color-mismatched-layer-count'] =
concurrent_test('gl-3.2-layered-rendering-clear-color-mismatched-layer-count')
spec['!OpenGL 3.2/layered-rendering/clear-depth'] =
concurrent_test('gl-3.2-layered-rendering-clear-depth')
spec['!OpenGL 3.2/layered-rendering/framebuffertexture'] =
concurrent_test('gl-3.2-layered-rendering-framebuffertexture')
spec['!OpenGL 3.2/layered-rendering/framebuffertexture-buffer-textures'] =
concurrent_test('gl-3.2-layered-rendering-framebuffertexture-buffer-textures')
diff --git a/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
b/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
index a24ed8f..5d88b81 100644
--- a/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
@@ -12,6 +12,7 @@ link_libraries (
piglit_add_executable (gl-3.2-layered-rendering-blit blit.c)
piglit_add_executable (gl-3.2-layered-rendering-clear-color clear-color.c)
piglit_add_executable (gl-3.2-layered-rendering-clear-color-all-types
clear-color-all-types.c)
+piglit_add_executable
(gl-3.2-layered-rendering-clear-color-mismatched-layer-count
clear-color-mismatched-layer-count.c)
piglit_add_executable (gl-3.2-layered-rendering-clear-depth clear-depth.c)
piglit_add_executable
(gl-3.2-layered-rendering-framebuffer-layered-attachments
framebuffer-layered-attachments.c)
piglit_add_executable
(gl-3.2-layered-rendering-framebuffer-layer-attachment-mismatch
framebuffer-layer-attachment-mismatch.c)
diff --git
a/tests/spec/gl-3.2/layered-rendering/clear-color-mismatched-layer-count.c
b/tests/spec/gl-3.2/layered-rendering/clear-color-mismatched-layer-count.c
new file mode 100644
index 0000000..e27ecc7
--- /dev/null
+++ b/tests/spec/gl-3.2/layered-rendering/clear-color-mismatched-layer-count.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright © 2013 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
+ *
+ * Test that a layered color clear clears all layers of all
+ * framebuffer attachments, even if not all framebuffer attachments
+ * have the same layer count.
+ *
+ * The test operates as follows:
+ *
+ * - Two textures are created, each with a different layer count.
+ *
+ * - Every layer of both textures is individually cleared to red.
+ *
+ * - Every layer of both textures is checked to verify that it has
+ * been properly cleared to red.
+ *
+ * - Both textures are bound to a single framebuffer in layered
+ * fashion, and then the entire framebuffer is cleared to green all
+ * at once.
+ *
+ * - Every layer of both textures is checked to verify that it has
+ * been cleared to green.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "piglit-util.h"
+
+#define TEX_SIZE 128
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 32;
+ config.supports_gl_core_version = 32;
+ config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static void
+check_completeness(const char *when, GLenum target)
+{
+ GLenum fbstatus = glCheckFramebufferStatus(target);
+ if (fbstatus != GL_FRAMEBUFFER_COMPLETE) {
+ printf("Framebuffer incomplete when %s: %s\n", when,
+ piglit_get_gl_enum_name(fbstatus));
+ piglit_report_result(PIGLIT_FAIL);
+ }
+}
+
+
+static bool
+check_layers(GLuint fbo, const GLuint *tex, int which_tex, bool expect_red,
+ int num_layers)
+{
+ const GLfloat red[] = { 1, 0, 0, 1 };
+ const GLfloat green[] = { 0, 1, 0, 1 };
+ bool pass = true;
+ int layer;
+
+ const GLfloat *expected_color;
+ if (expect_red)
+ expected_color = red;
+ else
+ expected_color = green;
+
+ for (layer = 0; layer < num_layers; layer++) {
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+ glFramebufferTextureLayer(GL_READ_FRAMEBUFFER,
+ GL_COLOR_ATTACHMENT0,
+ tex[which_tex], 0, layer);
+ check_completeness("reading layers",
+ GL_READ_FRAMEBUFFER);
+ printf("Probing texture %d, layer %d\n", which_tex, layer);
+
+ pass = piglit_probe_rect_rgba(0, 0, TEX_SIZE,
+ TEX_SIZE,
+ expected_color) && pass;
+ }
+ return pass;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ int layer, i;
+ bool pass = true;
+ GLuint tex[2], fbo;
+ int num_layers[2] = { 4, 8 };
+ GLenum draw_buffers[2] = {
+ GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1
+ };
+
+ glGenTextures(2, tex);
+ for (i = 0; i < 2; i++) {
+ glBindTexture(GL_TEXTURE_2D_ARRAY, tex[i]);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER,
+ GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER,
+ GL_LINEAR);
+ glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA,
+ TEX_SIZE, TEX_SIZE,
+ num_layers[i], 0 /* border */,
+ GL_RGBA, GL_FLOAT, NULL);
+ }
+ glGenFramebuffers(1, &fbo);
+
+ /* Bind each layer of the texture individually and clear it to red. */
+ printf("Clearing each layer individually\n");
+ glViewport(0, 0, TEX_SIZE, TEX_SIZE);
+ glClearColor(1, 0, 0, 1);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+ for (i = 0; i < 2; i++) {
+ for (layer = 0; layer < num_layers[i]; layer++) {
+ glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER,
+ GL_COLOR_ATTACHMENT0,
+ tex[i], 0, layer);
+ check_completeness("clearing individual layers",
+ GL_DRAW_FRAMEBUFFER);
+ glClear(GL_COLOR_BUFFER_BIT);
+ }
+ }
+
+ /* Check that each layer of both textures is cleared to
+ * red. */
+ for (i = 0; i < 2; i++) {
+ pass = check_layers(fbo, tex, i, true, num_layers[i]) && pass;
+ }
+
+ /* Bind both textures to a single framebuffer in layered
+ * fashion, and clear the entire framebuffer to green.
+ */
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+ printf("Clearing all layers of both textures at once\n");
+ glClearColor(0, 1, 0, 1);
+ glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ tex[0], 0);
+ glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1,
+ tex[1], 0);
+ check_completeness("clearing whole texture",
+ GL_DRAW_FRAMEBUFFER);
+ glDrawBuffers(2, draw_buffers);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, 0, 0);
+ glDrawBuffers(1, draw_buffers);
+
+ /* Check that each layer of both textures is cleared to the
+ * proper color.
+ */
+ for (i = 0; i < 2; i++) {
+ pass = check_layers(fbo, tex, i, false, num_layers[i]) && pass;
+ }
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ /* Should never be reached */
+ return PIGLIT_FAIL;
+}
--
1.8.5.2
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