arb_direct_state_access: Add non-DSA test for DrawBuffers.

3 files changed, 162 insertions, 0 deletions

diff --git a/tests/all.py b/tests/all.py
index 2779c175f..a955238c8 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4248,6 +4248,7 @@ with profile.group_manager(
     g(['arb_direct_state_access-invalidateframebuffer'], 'invalidateframebuffer')
     g(['arb_direct_state_access-clearnamedframebuffer'], 'clearnamedframebuffer')
     g(['arb_direct_state_access-drawbuffers'], 'drawbuffers')
+    g(['arb_direct_state_access-drawbuffers-multi'], 'drawbuffers-multi')
 
 with profile.group_manager(
         PiglitGLTest,
diff --git a/tests/spec/arb_direct_state_access/CMakeLists.gl.txt b/tests/spec/arb_direct_state_access/CMakeLists.gl.txt
index 72900c8ac..b1fe6c4b6 100644
--- a/tests/spec/arb_direct_state_access/CMakeLists.gl.txt
+++ b/tests/spec/arb_direct_state_access/CMakeLists.gl.txt
@@ -32,6 +32,7 @@ piglit_add_executable (arb_direct_state_access-fbattachmentparam-errors fbattach
 piglit_add_executable (arb_direct_state_access-invalidateframebuffer invalidateframebuffer.c)
 piglit_add_executable (arb_direct_state_access-clearnamedframebuffer clearnamedframebuffer.c)
 piglit_add_executable (arb_direct_state_access-drawbuffers drawbuffers.c)
+piglit_add_executable (arb_direct_state_access-drawbuffers-multi drawbuffers-multi.c)
 piglit_add_executable (arb_direct_state_access-dsa-textures dsa-textures.c dsa-utils.c)
 piglit_add_executable (arb_direct_state_access-texturesubimage texturesubimage.c)
 piglit_add_executable (arb_direct_state_access-bind-texture-unit bind-texture-unit.c)
diff --git a/tests/spec/arb_direct_state_access/drawbuffers-multi.c b/tests/spec/arb_direct_state_access/drawbuffers-multi.c
new file mode 100644
index 000000000..06740b6a3
--- /dev/null
+++ b/tests/spec/arb_direct_state_access/drawbuffers-multi.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright © 2015 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 drawbuffers-multi.c
+ *
+ * Tests explicitly setting the read and draw framebuffers. Tests drawing
+ * multiple fragments at the same time.
+ *
+ * Somewhat inspired by tests/general/read-front.c.
+ * Adapted from tests/spec/arb_direct_state_access/drawbuffers.c.
+ */
+
+#include "piglit-util-gl.h"
+#include "piglit-shader.h"
+#include "dsa-utils.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 32;
+
+	config.window_visual = PIGLIT_GL_VISUAL_RGBA |
+			       PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+/*
+ * You must use shaders in order to render to multiple buffers at once.
+ * These duplicate fixed-function gl 1.0 pipeline shading.
+ * Adapted from arb_clear_texture/3d.c.
+ */
+static const char vs_source[] =
+	"#version 140\n"
+	"in vec4 piglit_vertex;\n"
+	"uniform mat4 proj;\n"
+	"\n"
+	"void main()\n"
+	"{\n"
+	"        gl_Position = proj * piglit_vertex;\n"
+	"}\n";
+
+static const char fs_source[] =
+	"#version 140\n"
+	"uniform vec4 red;\n"
+	"uniform vec4 green;\n"
+	"uniform vec4 blue;\n"
+	"\n"
+	"void main()\n"
+	"{\n"
+	"        gl_FragData[0] = red;\n"
+	"        gl_FragData[1] = green;\n"
+	"        gl_FragData[2] = blue;\n"
+	"}\n";
+
+static bool pass = true;
+static GLuint program;
+static GLuint fbo;
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_ARB_direct_state_access");
+	program = piglit_build_simple_program(vs_source, fs_source);
+}
+
+static void
+clear_subtest(float color[4], int att, const char *test_name)
+{
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+	glNamedFramebufferReadBuffer(fbo, GL_COLOR_ATTACHMENT0 + att);
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+
+	piglit_check_gl_error(GL_NO_ERROR);
+	SUBTESTCONDITION(piglit_probe_rect_rgb(0, 0, piglit_width,
+			 piglit_height, color), pass, test_name);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	float red[]	= {1, 0, 0, 1};
+	float green[]	= {0, 1, 0, 1};
+	float blue[]	= {0, 0, 1, 1};
+	GLuint textures[3];
+	int i;
+	GLint red_uniform, green_uniform, blue_uniform, proj_uniform;
+	GLenum bufs[] = {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1,
+			 GL_COLOR_ATTACHMENT2};
+
+	/* Set up the shader program. */
+	glUseProgram(program);
+	red_uniform = glGetUniformLocation(program, "red");
+	glUniform4fv(red_uniform, 1, red);
+	green_uniform = glGetUniformLocation(program, "green");
+	glUniform4fv(green_uniform, 1, green);
+	blue_uniform = glGetUniformLocation(program, "blue");
+	glUniform4fv(blue_uniform, 1, blue);
+	proj_uniform = glGetUniformLocation(program, "proj");
+	piglit_ortho_uniform(proj_uniform, piglit_width, piglit_height);
+
+	/* Make a custom framebuffer with three color attachments */
+	glCreateFramebuffers(1, &fbo);
+	glCreateTextures(GL_TEXTURE_2D, 3, textures);
+	for (i = 0; i < 3; ++i) {
+		glTextureStorage2D(textures[i], 1, GL_RGBA8,
+				   piglit_width, piglit_height);
+		glNamedFramebufferTexture(fbo, GL_COLOR_ATTACHMENT0 + i,
+					  textures[i], 0);
+	}
+
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+	piglit_check_gl_error(GL_NO_ERROR);
+
+	/* Set the draw buffers */
+	glDrawBuffers(3, bufs);
+
+	/* Draw the pretty colors. */
+	piglit_draw_rect(0, 0, piglit_width, piglit_height);
+
+	/* Make sure the correct colors were drawn */
+	clear_subtest(blue, 2, "Clear 2 to blue");
+	clear_subtest(red, 0, "Clear 0 to red");
+	clear_subtest(green, 1, "Clear 1 to green");
+
+	/* Show the results of the last subtest on the screen */
+	if (!piglit_automatic) {
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
+		glBlitFramebuffer(0, 0, piglit_width, piglit_height,
+				  0, 0, piglit_width, piglit_height,
+				  GL_COLOR_BUFFER_BIT, GL_NEAREST);
+		piglit_present_results();
+	}
+
+
+	glDeleteTextures(3, textures);
+	glDeleteFramebuffers(1, &fbo);
+	glDeleteProgram(program);
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}