GL 3.2: Test layered framebuffers clear the color attachment properly.

Reviewed-by: Paul Berry <stereotype441@gmail.com>

2 files changed, 214 insertions, 0 deletions

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 adf673d6a..fabad021c 100644
--- a/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
@@ -10,4 +10,5 @@ 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)
 # vim: ft=cmake:
diff --git a/tests/spec/gl-3.2/layered-rendering/clear-color.c b/tests/spec/gl-3.2/layered-rendering/clear-color.c
new file mode 100644
index 000000000..c93ae4e9e
--- /dev/null
+++ b/tests/spec/gl-3.2/layered-rendering/clear-color.c
@@ -0,0 +1,213 @@
+/*
+ * 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 clear-color.c
+ *
+ * Section 4.4.7(Framebuffer Objects) From GL spec 3.2 core:
+ * When the Clear or ClearBuffer* commands are used to clear a layered
+ * framebuffer attachment, all layers of the attachment are cleared.
+ *
+ * Test Layout
+ *         Tex1     Tex2
+ *      *--------*--------*    Each Layer for both tex1 and tex2 will be
+ *      | layer3 | layer3 |   different colors.
+ *      *--------*--------*
+ *      | layer2 | layer2 |    Tex1 will be cleared using glClear()
+ *      *--------*--------*
+ *      | layer1 | layer1 |    Tex2 will be cleared using glClearBuffer()
+ *      *--------*--------*
+ *
+ *      Result:
+ *        Layer 1-3 of both tex1 and tex2 should be the clearColor
+ */
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 32;
+	config.supports_gl_core_version = 32;
+
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static GLuint fbo[2];
+static GLuint texture[2];
+static const int layers = 3;
+
+bool
+display_layered_texture(int x, int y, int w, int h, int texWidth, int texHeight,
+			GLenum textureType, GLuint texture, int layers) {
+	GLuint tempFBO;
+	int i;
+	int dx1, dy1, dx2, dy2;
+
+	dx1 = x;
+	dx2 = x+w;
+
+	/* Gen temp fbo */
+	glGenFramebuffers(1, &tempFBO);
+
+	/* Loop through each layer, attaching the individual layer to the
+	 * temp fbo, then blit fbo to the correct location on screen
+	 */
+	for(i = 0; i < layers; i++) {
+		GLenum framebufferStatus;
+
+		dy1 = y + (i)  *(h/layers);
+		dy2 = y + (i+1)*(h/layers);
+
+		glBindFramebuffer(GL_FRAMEBUFFER, tempFBO);
+		glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+					  texture, 0, i);
+
+		framebufferStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+		if(framebufferStatus != GL_FRAMEBUFFER_COMPLETE) {
+			printf("Framebuffer Status: %s\n",
+			       piglit_get_gl_enum_name(framebufferStatus));
+			return false;
+		}
+
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+		glBindFramebuffer(GL_READ_FRAMEBUFFER, tempFBO);
+		glBlitFramebuffer(0, 0, texWidth, texHeight,
+				  dx1, dy1, dx2, dy2, GL_COLOR_BUFFER_BIT,
+				  GL_NEAREST);
+	}
+
+	/* Cleanup temp fbo */
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+	glDeleteFramebuffers(1, &tempFBO);
+
+	return piglit_check_gl_error(GL_NO_ERROR);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	int i, j;
+	GLenum fbstatus;
+	float colorLayers[layers][piglit_width*piglit_height*3];
+	float colors[3][3] = {
+		{0.0, 0.0, 1.0},
+		{0.0, 1.0, 0.0},
+		{1.0, 0.0, 0.0}
+	};
+
+	/* Create color data for texture */
+	for(j = 0; j < layers; j++) {
+		for(i = 0; i < piglit_width*piglit_height; i++) {
+			colorLayers[j][i*3+0] = colors[j][0];
+			colorLayers[j][i*3+1] = colors[j][1];
+			colorLayers[j][i*3+2] = colors[j][2];
+		}
+	}
+
+	glGenTextures(2, texture);
+	glGenFramebuffers(2, fbo);
+	for(i = 0; i < 2; i++) {
+		/* Create texture */
+		glBindTexture(GL_TEXTURE_2D_ARRAY, texture[i]);
+		glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_REPEAT);
+		glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_REPEAT);
+		glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_R, GL_REPEAT);
+		glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGB, piglit_width, piglit_height,
+			     layers, 0, GL_RGB, GL_FLOAT, colorLayers);
+
+		/* Gen Framebuffer */
+		glBindFramebuffer(GL_FRAMEBUFFER, fbo[i]);
+		glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+				     texture[i], 0);
+
+		fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+		if(fbstatus != GL_FRAMEBUFFER_COMPLETE){
+			printf("%s\n", piglit_get_gl_enum_name(fbstatus));
+			piglit_report_result(PIGLIT_FAIL);
+		}
+	}
+
+	if(!piglit_check_gl_error(GL_NO_ERROR))
+		piglit_report_result(PIGLIT_FAIL);
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+	bool pass = true;
+	const float clearColor[3] = { 1, 1, 0 };
+
+	/* Clear Defualt Framebuffer */
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+	glClearColor(1,1,0,1);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Clear texture[0] with glClear() */
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);
+	glClearColor(clearColor[0], clearColor[1], clearColor[2], 1);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Clear texture[1] with glClearBuffer() */
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo[1]);
+	glClearBufferfv(GL_COLOR, 0, clearColor);
+
+	/* Display glClear texture */
+	if(!display_layered_texture(0, 0, piglit_width/2, piglit_height,
+				    piglit_width, piglit_height, GL_TEXTURE_2D_ARRAY,
+				    texture[0], layers)) {
+		printf("Failed to display layered texture for glClear\n");
+		pass = false;
+	}
+
+	/* Display glClearBuffer texture */
+	if(!display_layered_texture(piglit_width/2, 0, piglit_width/2,
+				    piglit_height, piglit_width, piglit_height,
+				    GL_TEXTURE_2D_ARRAY, texture[1], layers)) {
+		printf("Failed to display layered texture for glClearBuffer\n");
+		pass = false;
+	}
+
+	/* Check for passing conditions for glClear*/
+	if(!piglit_probe_rect_rgb(0, 0, piglit_width/2, piglit_height,
+				  clearColor)) {
+		printf("Incorrect probe value for glClear test.\n");
+		pass = false;
+	}
+
+	/* Check for passing conditions for glClearBuffer*/
+	if(!piglit_probe_rect_rgb(piglit_width/2, 0, piglit_width/2,
+				  piglit_height, clearColor)) {
+		printf("Incorrect probe value for glClearBuffer test.\n");
+		pass = false;
+	}
+
+	if(!piglit_check_gl_error(GL_NO_ERROR))
+		pass = false;
+
+	piglit_present_results();
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}