[Piglit] [PATCH] Added a fbo test for multiple drawbuffer, with additive blending enabled The blend is the same for each drawbuffer.
Julian Adams
joolsa at gmail.com
Wed Mar 30 15:12:16 PDT 2011
---
tests/all.tests | 1 +
tests/fbo/CMakeLists.gl.txt | 1 +
tests/fbo/fbo-drawbuffers-blend-add.c | 251 +++++++++++++++++++++++++++++++++
3 files changed, 253 insertions(+), 0 deletions(-)
create mode 100644 tests/fbo/fbo-drawbuffers-blend-add.c
diff --git a/tests/all.tests b/tests/all.tests
index c2c58ae..eb86ae7 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -130,6 +130,7 @@ add_plain_test(fbo, 'fbo-depthtex')
add_plain_test(fbo, 'fbo-depth-sample-compare')
add_plain_test(fbo, 'fbo-drawbuffers')
add_plain_test(fbo, 'fbo-drawbuffers-arbfp')
+add_plain_test(fbo, 'fbo-drawbuffers-blend-add')
add_plain_test(fbo, 'fbo-drawbuffers-fragcolor')
add_plain_test(fbo, 'fbo-drawbuffers-maxtargets')
add_plain_test(fbo, 'fbo-drawbuffers2-blend')
diff --git a/tests/fbo/CMakeLists.gl.txt b/tests/fbo/CMakeLists.gl.txt
index 819d5cf..999c0c4 100644
--- a/tests/fbo/CMakeLists.gl.txt
+++ b/tests/fbo/CMakeLists.gl.txt
@@ -36,6 +36,7 @@ add_executable (fbo-clearmipmap fbo-clearmipmap.c)
add_executable (fbo-clear-formats fbo-clear-formats.c)
add_executable (fbo-drawbuffers fbo-drawbuffers.c)
add_executable (fbo-drawbuffers-arbfp fbo-drawbuffers-arbfp.c)
+add_executable (fbo-drawbuffers-blend-add fbo-drawbuffers-blend-add.c)
add_executable (fbo-drawbuffers-fragcolor fbo-drawbuffers-fragcolor.c)
add_executable (fbo-drawbuffers-maxtargets fbo-drawbuffers-maxtargets.c)
add_executable (fbo-drawbuffers2-blend fbo-drawbuffers2-blend.c)
diff --git a/tests/fbo/fbo-drawbuffers-blend-add.c b/tests/fbo/fbo-drawbuffers-blend-add.c
new file mode 100644
index 0000000..d6fce41
--- /dev/null
+++ b/tests/fbo/fbo-drawbuffers-blend-add.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright © 2010 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.
+ *
+ * Authors:
+ * Eric Anholt <eric at anholt.net>
+ * Marek Olšák <maraeo at gmail.com>
+ *
+ */
+
+/** @file fbo-drawbuffers-blend-add.c
+ *
+ * Tests that additive blending is enabled for all render targets with ARB_draw_buffers.
+ */
+
+#include <string.h>
+#include "piglit-util.h"
+
+int piglit_width = 256;
+int piglit_height = 256;
+int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
+
+static GLint max_targets;
+
+static char *vs_source =
+ "void main()\n"
+ "{\n"
+ " gl_Position = gl_Vertex;\n"
+ "}\n";
+
+static char *fs_source_start =
+ "void main()\n"
+ "{\n";
+
+static char *fs_source_output =
+ " gl_FragData[%d].xyzw = vec4(%f, %f, %f, %f);\n";
+
+static char *fs_source_end =
+ "}\n";
+
+float output_values[] = {
+ 0.0, 0.5, 0.0, 0.0,
+ 0.0, 0.0, 0.5, 0.0,
+ 0.0, 0.5, 0.5, 0.0,
+ 0.5, 0.5, 0.0, 0.0,
+
+ 0.0, 0.5, 0.0, 0.5,
+ 0.0, 0.0, 0.5, 0.5,
+ 0.0, 0.5, 0.5, 0.5,
+ 0.5, 0.5, 0.0, 0.5,
+
+ 0.0, 0.25, 0.0, 0.0,
+ 0.0, 0.0, 0.25, 0.0,
+ 0.0, 0.25, 0.25, 0.0,
+ 0.25, 0.25, 0.0, 0.0,
+
+ 0.0, 0.25, 0.0, 0.25,
+ 0.0, 0.0, 0.25, 0.25,
+ 0.0, 0.25, 0.25, 0.25,
+ 0.25, 0.25, 0.0, 0.25};
+
+float clear_value = 0.25;
+
+static GLuint
+attach_texture(int i)
+{
+ GLuint tex;
+
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+ 32, 32, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, 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_COLOR_ATTACHMENT0_EXT + i,
+ GL_TEXTURE_2D,
+ tex,
+ 0);
+ assert(glGetError() == 0);
+
+ return tex;
+}
+
+static void
+generate_and_display_drawbuffers(int count)
+{
+ GLuint tex[16], fb, fs, vs, prog;
+ GLenum attachments[16], status;
+ int i;
+
+ glGenFramebuffersEXT(1, &fb);
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
+
+ for (i = 0; i < count; i++) {
+ tex[i] = attach_texture(i);
+ attachments[i] = GL_COLOR_ATTACHMENT0 + i;
+ }
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ glDrawBuffersARB(count, attachments);
+
+ /* Clear all to 0.25 so we see if the shader rendering happens. */
+ glClearColor(clear_value, clear_value, clear_value, clear_value);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ /* Build the shader that spams green to all outputs. */
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
+
+ char fs_output_line[256];
+ char fs_full_source[1024];
+
+ strcpy(fs_full_source, fs_source_start);
+
+ for (i = 0; i < count; i++) {
+ sprintf(fs_output_line, fs_source_output, i, output_values[i * 4],
+ output_values[(i * 4) + 1], output_values[(i * 4) + 2],
+ output_values[(i * 4) + 3]);
+
+ strcat(fs_full_source, fs_output_line);
+ }
+
+ strcat(fs_full_source, fs_source_end);
+
+ assert(strlen(fs_full_source) + 1 < sizeof(fs_full_source) / sizeof(fs_full_source[0]));
+
+ fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_full_source);
+
+ prog = piglit_link_simple_program(vs, fs);
+ glUseProgram(prog);
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ONE, GL_ONE);
+ glBlendEquation(GL_FUNC_ADD);
+
+ /* Now render to all the color buffers. */
+ piglit_draw_rect(-1, -1, 2, 2);
+
+ glDisable(GL_BLEND);
+
+ /* OK, now draw each of these textures to the winsys framebuffer. */
+ glUseProgram(0);
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+ piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ glEnable(GL_TEXTURE_2D);
+ for (i = 0; i < count; i++) {
+ glBindTexture(GL_TEXTURE_2D, tex[i]);
+ piglit_draw_rect_tex(16 * i, 16 * (count - 1),
+ 16, 16,
+ 0, 0,
+ 1, 1);
+ }
+ glDisable(GL_TEXTURE_2D);
+
+ for (i = 0; i < count; i++) {
+ glDeleteTextures(1, &tex[i]);
+ }
+ glDeleteFramebuffersEXT(1, &fb);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ #define N_VECTOR_ITEMS 4
+ GLboolean pass = GL_TRUE;
+ int count, i, j;
+ float expected[N_VECTOR_ITEMS] = {0};
+
+
+ glClearColor(0.5, 0.5, 0.5, 0.5);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ for (count = 1; count <= max_targets; count++) {
+ generate_and_display_drawbuffers(count);
+ }
+
+ for (count = 1; count <= max_targets; count++) {
+ for (i = 0; i < count; i++) {
+ for (j = 0; j < N_VECTOR_ITEMS; j++) {
+ expected[j] = output_values[(i * N_VECTOR_ITEMS) + j] +
+ clear_value;
+ }
+
+ pass = pass &&
+ piglit_probe_pixel_rgba(16 * i + 8,
+ 16 * (count - 1) + 8,
+ expected);
+ }
+ }
+
+ glutSwapBuffers();
+
+ return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ GLint max_attachments;
+
+ printf("The result should be a rows of boxes of differing colors, \n"
+ "one for each drawbuffer target used (none black).\n");
+
+ piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+ if (!GLEW_VERSION_2_0) {
+ printf("Requires OpenGL 2.0\n");
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ piglit_require_extension("GL_EXT_framebuffer_object");
+ piglit_require_extension("GL_ARB_draw_buffers");
+
+ glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_targets);
+ if (max_targets < 2)
+ piglit_report_result(PIGLIT_SKIP);
+
+ glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &max_attachments);
+ if (max_targets > max_attachments)
+ max_targets = max_attachments;
+
+ if (max_targets > 16)
+ max_targets = 16;
+}
--
1.7.1
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