[Piglit] [PATCH 1/2] Test scissoring of blits in both windows and fbos.
Paul Berry
stereotype441 at gmail.com
Mon Jul 16 13:33:31 PDT 2012
---
tests/all.tests | 2 +
tests/fbo/CMakeLists.gl.txt | 1 +
tests/fbo/fbo-scissor-blit.c | 187 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 190 insertions(+), 0 deletions(-)
create mode 100644 tests/fbo/fbo-scissor-blit.c
diff --git a/tests/all.tests b/tests/all.tests
index 46f6a9b..1d7f068 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -240,6 +240,8 @@ add_plain_test(fbo, 'fbo-readdrawpix')
add_plain_test(fbo, 'fbo-readpixels')
add_plain_test(fbo, 'fbo-readpixels-depth-formats')
add_plain_test(fbo, 'fbo-scissor-bitmap')
+fbo['fbo-scissor-blit fbo'] = PlainExecTest(['fbo-scissor-blit', 'fbo', '-auto'])
+fbo['fbo-scissor-blit window'] = PlainExecTest(['fbo-scissor-blit', 'window', '-auto'])
add_plain_test(fbo, 'fbo-srgb')
add_plain_test(fbo, 'fbo-srgb-blit')
add_plain_test(fbo, 'fbo-storage-formats')
diff --git a/tests/fbo/CMakeLists.gl.txt b/tests/fbo/CMakeLists.gl.txt
index de25b38..07b14c4 100644
--- a/tests/fbo/CMakeLists.gl.txt
+++ b/tests/fbo/CMakeLists.gl.txt
@@ -74,6 +74,7 @@ piglit_add_executable (fbo-nostencil-test fbo-nostencil-test.c)
piglit_add_executable (fbo-readpixels fbo-readpixels.c)
piglit_add_executable (fbo-readpixels-depth-formats fbo-readpixels-depth-formats.c)
piglit_add_executable (fbo-rg fbo-rg.c)
+piglit_add_executable (fbo-scissor-blit fbo-scissor-blit.c)
piglit_add_executable (fbo-srgb fbo-srgb.c)
piglit_add_executable (fbo-srgb-blit fbo-srgb-blit.c)
IF (UNIX)
diff --git a/tests/fbo/fbo-scissor-blit.c b/tests/fbo/fbo-scissor-blit.c
new file mode 100644
index 0000000..791d948
--- /dev/null
+++ b/tests/fbo/fbo-scissor-blit.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright © 2012 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 fbo-scissor-blit.c
+ *
+ * Since window system framebuffers use a different coordinate system
+ * than fbo's, it is important to check that glBlitFramebuffer()
+ * interprets scissor coordinates correctly depending whether the
+ * destination framebuffer is an fbo or a window. This test verifies
+ * proper scissor operation in both cases.
+ *
+ * The test takes a single command-line argument: "window" to test
+ * scissoring in a window, and "fbo" to test scissoring in an fbo. In
+ * the fbo case, the final image is blitted to the window afterwards
+ * (without scissoring it) so that failures can be easily diagnosed.
+ */
+
+#include "piglit-util-gl-common.h"
+
+static const int width = 128, height = 128;
+
+PIGLIT_GL_TEST_MAIN(width, height, GLUT_DOUBLE | GLUT_RGBA | GLUT_ALPHA)
+
+static GLuint src_fbo;
+static GLuint ref_fbo;
+static GLuint dst_fbo;
+
+
+static GLuint
+setup_framebuffer()
+{
+ GLuint fbo, rb;
+ glGenFramebuffers(1, &fbo);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+ glGenRenderbuffers(1, &rb);
+ glBindRenderbuffer(GL_RENDERBUFFER, rb);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, width, height);
+ glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_RENDERBUFFER, rb);
+ if (glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER)
+ != GL_FRAMEBUFFER_COMPLETE) {
+ printf("Framebuffer incomplete\n");
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ return fbo;
+}
+
+
+static void
+print_usage_and_exit(char *prog_name)
+{
+ printf("Usage: %s <dst_fb_type>\n"
+ " where <dst_fb_type> is one of:\n"
+ " fbo\n"
+ " window\n",
+ prog_name);
+ piglit_report_result(PIGLIT_FAIL);
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ bool blit_to_fbo;
+
+ if (argc != 2)
+ print_usage_and_exit(argv[0]);
+
+ if (strcmp(argv[1], "window") == 0)
+ blit_to_fbo = false;
+ else if (strcmp(argv[1], "fbo") == 0)
+ blit_to_fbo = true;
+ else
+ print_usage_and_exit(argv[0]);
+
+ piglit_require_extension("GL_EXT_framebuffer_object");
+ piglit_require_extension("GL_EXT_framebuffer_blit");
+
+ src_fbo = setup_framebuffer();
+ ref_fbo = setup_framebuffer();
+ if (blit_to_fbo)
+ dst_fbo = setup_framebuffer();
+ else
+ dst_fbo = 0;
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ float red[4] = {1.0, 0.0, 0.0, 0.0};
+ float green[4] = {0.0, 1.0, 0.0, 0.25};
+ float blue[4] = {0.0, 0.0, 1.0, 0.5};
+ float white[4] = {1.0, 1.0, 1.0, 1.0};
+ float grey[4] = {0.5, 0.5, 0.5, 0.5};
+ bool pass;
+ float *ref_image;
+
+ /* Draw the source image to src_fbo */
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, src_fbo);
+ glEnable(GL_SCISSOR_TEST);
+
+ glScissor(0, 0, width / 2, height / 2);
+ glClearColor(red[0], red[1], red[2], red[3]);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glScissor(width / 2, 0, width / 2, height / 2);
+ glClearColor(green[0], green[1], green[2], green[3]);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glScissor(0, height / 2, width / 2, height / 2);
+ glClearColor(blue[0], blue[1], blue[2], blue[3]);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glScissor(width / 2, height / 2, width / 2, height / 2);
+ glClearColor(white[0], white[1], white[2], white[3]);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glDisable(GL_SCISSOR_TEST);
+
+ glClearColor(grey[0], grey[1], grey[2], grey[3]);
+
+ /* Blit to dst_fbo, scissoring the image in an asymmetrical way. */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst_fbo);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(10, 20, width - 40, height - 60);
+ glBlitFramebuffer(0, 0, width, height,
+ 0, 0, width, height,
+ GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ glDisable(GL_SCISSOR_TEST);
+
+ /* Blit to ref_fbo, simulating the correct scissoring effect
+ * by manually adjusting the coordinates.
+ */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ref_fbo);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glBlitFramebuffer(10, 20, width - 30, height - 40,
+ 10, 20, width - 30, height - 40,
+ GL_COLOR_BUFFER_BIT, GL_NEAREST);
+
+ /* Read the reference image from ref_fbo */
+ ref_image = malloc(sizeof(float) * 4 * width * height);
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, ref_fbo);
+ glReadPixels(0, 0, width, height, GL_RGBA, GL_FLOAT, ref_image);
+
+ /* Compare the image in dst_fbo with the reference image */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, dst_fbo);
+ pass = piglit_probe_image_rgba(0, 0, width, height, ref_image);
+
+ if (dst_fbo != 0) {
+ /* Show the contents of dst_fbo in the window */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, dst_fbo);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+ glBlitFramebuffer(0, 0, width, height,
+ 0, 0, width, height,
+ GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ }
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.7.7.6
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