[Mesa-dev] [PATCH] glsl-fs-normalmatrix: New test program for gl_NormalMatrix.
Eric Anholt
eric at anholt.net
Tue Oct 18 17:33:28 PDT 2011
From: tom fogal <tfogal at sci.utah.edu>
v2: lots of hacking by anholt to make it look more like a normal
piglit test and make all results visible at once.
---
tests/all.tests | 1 +
tests/shaders/CMakeLists.gl.txt | 1 +
tests/shaders/glsl-fs-normalmatrix.c | 166 ++++++++++++++++++++++++++++++++++
3 files changed, 168 insertions(+), 0 deletions(-)
create mode 100644 tests/shaders/glsl-fs-normalmatrix.c
diff --git a/tests/all.tests b/tests/all.tests
index 0248164..89bd03d 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -396,6 +396,7 @@ add_plain_test(shaders, 'glsl-fs-loop')
add_plain_test(shaders, 'glsl-fs-loop-nested')
add_plain_test(shaders, 'glsl-fs-mix')
add_plain_test(shaders, 'glsl-fs-mix-constant')
+add_concurrent_test(shaders, 'glsl-fs-normalmatrix')
add_plain_test(shaders, 'glsl-fs-pointcoord')
add_plain_test(shaders, 'glsl-fs-raytrace-bug27060')
add_plain_test(shaders, 'glsl-fs-sampler-numbering')
diff --git a/tests/shaders/CMakeLists.gl.txt b/tests/shaders/CMakeLists.gl.txt
index 3dce256..ed72b21 100644
--- a/tests/shaders/CMakeLists.gl.txt
+++ b/tests/shaders/CMakeLists.gl.txt
@@ -82,6 +82,7 @@ add_executable (glsl-fs-loop glsl-fs-loop.c)
add_executable (glsl-fs-loop-nested glsl-fs-loop-nested.c)
add_executable (glsl-fs-mix glsl-fs-mix.c)
add_executable (glsl-fs-mix-constant glsl-fs-mix-constant.c)
+add_executable (glsl-fs-normalmatrix glsl-fs-normalmatrix.c)
IF (NOT MSVC)
add_executable (glsl-fs-raytrace-bug27060 glsl-fs-raytrace-bug27060.c)
ENDIF (NOT MSVC)
diff --git a/tests/shaders/glsl-fs-normalmatrix.c b/tests/shaders/glsl-fs-normalmatrix.c
new file mode 100644
index 0000000..b55a80a
--- /dev/null
+++ b/tests/shaders/glsl-fs-normalmatrix.c
@@ -0,0 +1,166 @@
+/*
+ * 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:
+ * Tom Fogal
+ *
+ */
+
+/** @file glsl-fs-normalmatrix.c
+ *
+ * Tests gl_NormalMatrix for appropriate initial values.
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 30, piglit_height = 30;
+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
+
+static const char vert[] = {
+ "void main()\n"
+ "{\n"
+ " gl_Position = ftransform();\n"
+ "}\n"
+};
+
+/* Creates a fragment shader which colors everything green if
+ * gl_NormalMatrix[col].row
+ * is between 'low' and 'high', otherwise everything is red.
+ * The returned string is dynamically allocated and must be free'd by the
+ * caller.
+ */
+static char *
+generate_fs(int row, int col)
+{
+ static const char *fs_template =
+ "void main()\n"
+ "{\n"
+ " if (%f <= gl_NormalMatrix[%u].%c &&\n"
+ " gl_NormalMatrix[%u].%c <= %f)\n"
+ " gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);\n"
+ " else\n"
+ " gl_FragColor = vec4(1.0, 0.0, 0.0, 0.0);\n"
+ "}\n";
+ char *result;
+ char row_char = "xyz"[row];
+ float expected_matrix[] = {
+ 1, 0, 0,
+ 0, 1, 0,
+ 0, 0, 1,
+ };
+ float expected = expected_matrix[row * 3 + col];
+ float low = expected - .01;
+ float high = expected + .01;
+
+ if (0) {
+ printf("test: %g <= gl_NormalMatrix[%u].%c <= %g\n",
+ low, col, row_char, high);
+ }
+
+ result = calloc(1, strlen(fs_template) + 100);
+ sprintf(result, fs_template, low, col, row_char, col, row_char, high);
+
+ return result;
+}
+
+static bool
+test(int row, int col)
+{
+ GLint vs, fs, prog;
+ float green[] = {0.0, 1.0, 0.0, 0.0};
+ char *fs_source;
+ bool pass;
+ int w = piglit_width / 3;
+ int h = piglit_height / 3;
+ int x = col * w;
+ int y = (2 - row) * h;
+
+ fs_source = generate_fs(row, col);
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vert);
+ fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
+ prog = piglit_link_simple_program(vs, fs);
+ glUseProgram(prog);
+
+ if (!fs || !vs || !prog) {
+ printf("Failed to compile with fragment shader:\n%s\n",
+ fs_source);
+ return false;
+ }
+
+ piglit_draw_rect(x, y, w, h);
+ pass = piglit_probe_rect_rgb(x, y, w, h, green);
+
+ /* clean up shaders. */
+ free(fs_source);
+ glUseProgram(0);
+ glDeleteShader(vs);
+ glDeleteShader(fs);
+ glDeleteProgram(prog);
+
+ return pass;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLboolean pass = GL_TRUE;
+ int row, col;
+
+ /* Set up projection matrix so we can just draw using window
+ * coordinates.
+ */
+ piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+ /* Set the modelview to identity, which means normalmatrix
+ * should also be identity.
+ */
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ for (row = 0; row < 3; row++) {
+ for (col = 0; col < 3; col++) {
+ pass = test(row, col) && pass;
+ }
+ }
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ if (!GLEW_VERSION_2_0) {
+ printf("Requires OpenGL 2.0\n");
+ piglit_report_result(PIGLIT_SKIP);
+ }
+ piglit_require_GLSL();
+
+ printf("gl_NormalMatrix access results are displayed as:\n");
+ printf(" x y z\n");
+ printf(" +-+-+-+\n");
+ printf("row 0 |1|0|0|\n");
+ printf(" +-+-+-+\n");
+ printf("row 1 |0|1|0|\n");
+ printf(" +-+-+-+\n");
+ printf("row 2 |0|0|1|\n");
+ printf(" +-+-+-+\n");
+}
--
1.7.7
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