[Piglit] [PATCH] ext_transform_feedback-points: a new, simple xfb test
Brian Paul
brianp at vmware.com
Mon Nov 3 16:07:15 PST 2014
If argv[1]="large", draw large points (which may get converted to quads).
---
tests/all.py | 2 +
.../spec/ext_transform_feedback/CMakeLists.gl.txt | 1 +
tests/spec/ext_transform_feedback/points.c | 177 ++++++++++++++++++++
3 files changed, 180 insertions(+)
create mode 100644 tests/spec/ext_transform_feedback/points.c
diff --git a/tests/all.py b/tests/all.py
index c71462e..3a2f4e2 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3109,6 +3109,8 @@ ext_transform_feedback['max-varyings'] = PiglitGLTest('ext_transform_feedback-ma
ext_transform_feedback['nonflat-integral'] = PiglitGLTest('ext_transform_feedback-nonflat-integral', run_concurrent=True)
ext_transform_feedback['overflow-edge-cases'] = PiglitGLTest('ext_transform_feedback-overflow-edge-cases', run_concurrent=True)
ext_transform_feedback['overflow-edge-cases use_gs'] = PiglitGLTest('ext_transform_feedback-overflow-edge-cases use_gs', run_concurrent=True)
+ext_transform_feedback['points'] = PiglitGLTest('ext_transform_feedback-points', run_concurrent=True)
+ext_transform_feedback['points-large'] = PiglitGLTest('ext_transform_feedback-points large', run_concurrent=True)
ext_transform_feedback['position-readback-bufferbase'] = PiglitGLTest('ext_transform_feedback-position', run_concurrent=True)
ext_transform_feedback['position-readback-bufferbase-discard'] = PiglitGLTest('ext_transform_feedback-position discard', run_concurrent=True)
ext_transform_feedback['position-readback-bufferoffset'] = PiglitGLTest('ext_transform_feedback-position offset', run_concurrent=True)
diff --git a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
index 1d03abd..95af3a5 100644
--- a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
+++ b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
@@ -24,6 +24,7 @@ piglit_add_executable (ext_transform_feedback-generatemipmap generatemipmap.c)
piglit_add_executable (ext_transform_feedback-geometry-shaders-basic geometry-shaders-basic.c)
piglit_add_executable (ext_transform_feedback-get-buffer-state get-buffer-state.c)
piglit_add_executable (ext_transform_feedback-position position.c)
+piglit_add_executable (ext_transform_feedback-points points.c)
piglit_add_executable (ext_transform_feedback-immediate-reuse immediate-reuse.c)
piglit_add_executable (ext_transform_feedback-interleaved interleaved.c)
piglit_add_executable (ext_transform_feedback-intervening-read intervening-read.c)
diff --git a/tests/spec/ext_transform_feedback/points.c b/tests/spec/ext_transform_feedback/points.c
new file mode 100644
index 0000000..bd8f115
--- /dev/null
+++ b/tests/spec/ext_transform_feedback/points.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright © 2014 VMware, Inc.
+ *
+ * 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.
+ */
+
+/**
+ * Simple transform feedback test drawing GL_POINTS.
+ * If argv[1] == "large" draw large points (which may hit a point->quad
+ * conversion path.)
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 10;
+ config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static GLuint prog;
+static GLuint xfb_buf, vert_buf;
+static const int xfb_buf_size = 500;
+
+static const char *vstext = {
+ "void main() {"
+ " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;"
+ " gl_FrontColor = vec4(0.9, 0.8, 0.7, 0.6);"
+ "}"
+};
+
+#define NUM_VERTS 3
+static const GLfloat verts[NUM_VERTS][3] =
+ {
+ {-1, 0.2, 0},
+ {0, 0.2, 0},
+ {1, 0.2, 0}
+ };
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ static const char *varyings[] = { "gl_Position", "gl_FrontColor" };
+ GLuint vs;
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glScalef(0.5, 0.5, 1.0);
+
+ /* Check the driver. */
+ piglit_require_gl_version(15);
+ piglit_require_GLSL();
+ piglit_require_transform_feedback();
+
+ /* Create shaders. */
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
+ prog = glCreateProgram();
+ glAttachShader(prog, vs);
+ glTransformFeedbackVaryings(prog, 2, varyings,
+ GL_INTERLEAVED_ATTRIBS_EXT);
+ glLinkProgram(prog);
+ if (!piglit_link_check_status(prog)) {
+ glDeleteProgram(prog);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+ glUseProgram(prog);
+
+ /* Set up the vertex data buffer */
+ glGenBuffers(1, &vert_buf);
+ glBindBuffer(GL_ARRAY_BUFFER, vert_buf);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
+
+ /* Set up the transform feedback buffer. */
+ glGenBuffers(1, &xfb_buf);
+ glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, xfb_buf);
+ glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
+ xfb_buf_size, NULL, GL_STREAM_READ);
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, 0, xfb_buf);
+
+ glClearColor(0.2, 0.2, 0.2, 1.0);
+
+ if (argc > 1 && strcmp(argv[1], "large") == 0) {
+ GLint range[2];
+ glGetIntegerv(GL_ALIASED_POINT_SIZE_RANGE, range);
+ if (range[1] == 1.0) {
+ printf("Max point size is %d, can't test large\n",
+ range[1]);
+ piglit_report_result(PIGLIT_WARN);
+ }
+ printf("Testing large points\n");
+ glPointSize(10.0);
+ }
+}
+
+
+static bool
+equal(float a, float b)
+{
+ return fabsf(a - b) < 0.0001;
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+ GLfloat *v;
+ int i;
+ GLuint q, num_prims;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glGenQueries(1, &q);
+ glBeginQuery(GL_PRIMITIVES_GENERATED_EXT, q);
+
+ glBeginTransformFeedback(GL_POINTS);
+ glBindBuffer(GL_ARRAY_BUFFER, vert_buf);
+ glVertexPointer(3, GL_FLOAT, 0, 0);
+ glEnable(GL_VERTEX_ARRAY);
+ glDrawArrays(GL_POINTS, 0, 3);
+ glEndTransformFeedback();
+
+ glEndQuery(GL_PRIMITIVES_GENERATED);
+
+ glGetQueryObjectuiv(q, GL_QUERY_RESULT, &num_prims);
+ glDeleteQueries(1, &q);
+ printf("%u primitives generated:\n", num_prims);
+
+ if (num_prims != NUM_VERTS) {
+ printf("Incorrect number of prims generated.\n");
+ printf("Found %u, expected %u\n", num_prims, NUM_VERTS);
+ pass = false;
+ }
+
+ glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, xfb_buf);
+ v = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, GL_READ_ONLY);
+ for (i = 0; i < num_prims; i++) {
+ printf("vertex %2d: pos %5.2g, %5.2g, %5.2g, %5.2g "
+ "color %5.2g, %5.2g, %5.2g, %5.2g\n", i,
+ v[i*8+0], v[i*8+1], v[i*8+2], v[i*8+3],
+ v[i*8+4], v[i*8+5], v[i*8+6], v[i*8+7]);
+ /* spot-check results */
+ if (!equal(v[i*8+1], 0.1)) {
+ printf("Incorrect Y coord for point %d: %f\n",
+ i, v[i*8+1]);
+ pass = false;
+ }
+ if (!equal(v[i*8+4], 0.9)) {
+ printf("Incorrect red value for point %d: %f\n",
+ i, v[i*8+4]);
+ pass = false;
+ }
+ }
+ glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT);
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.7.10.4
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