[Piglit] [PATCH 7/7] GL_ARB_ubo/maxblocks: New test for rendering with varying numbers of blocks.
Eric Anholt
eric at anholt.net
Mon Jul 2 09:23:11 PDT 2012
---
tests/all.tests | 1 +
.../arb_uniform_buffer_object/CMakeLists.gl.txt | 1 +
tests/spec/arb_uniform_buffer_object/maxblocks.c | 336 ++++++++++++++++++++
3 files changed, 338 insertions(+)
create mode 100644 tests/spec/arb_uniform_buffer_object/maxblocks.c
diff --git a/tests/all.tests b/tests/all.tests
index e32bf92..53b7c7b 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -1782,6 +1782,7 @@ arb_uniform_buffer_object['getuniformblockindex'] = concurrent_test('arb_uniform
arb_uniform_buffer_object['getuniformindices'] = concurrent_test('arb_uniform_buffer_object-getuniformindices')
arb_uniform_buffer_object['getuniformlocation'] = concurrent_test('arb_uniform_buffer_object-getuniformlocation')
arb_uniform_buffer_object['layout-std140'] = concurrent_test('arb_uniform_buffer_object-layout-std140')
+arb_uniform_buffer_object['maxblocks'] = concurrent_test('arb_uniform_buffer_object-maxblocks')
arb_uniform_buffer_object['minmax'] = concurrent_test('arb_uniform_buffer_object-minmax')
arb_uniform_buffer_object['negative-bindbuffer-buffer'] = concurrent_test('arb_uniform_buffer_object-negative-bindbuffer-buffer')
arb_uniform_buffer_object['negative-bindbuffer-index'] = concurrent_test('arb_uniform_buffer_object-negative-bindbuffer-index')
diff --git a/tests/spec/arb_uniform_buffer_object/CMakeLists.gl.txt b/tests/spec/arb_uniform_buffer_object/CMakeLists.gl.txt
index 77741b6..b25a261 100644
--- a/tests/spec/arb_uniform_buffer_object/CMakeLists.gl.txt
+++ b/tests/spec/arb_uniform_buffer_object/CMakeLists.gl.txt
@@ -20,6 +20,7 @@ add_executable (arb_uniform_buffer_object-getuniformblockindex getuniformblockin
add_executable (arb_uniform_buffer_object-getuniformindices getuniformindices.c)
add_executable (arb_uniform_buffer_object-getuniformlocation getuniformlocation.c)
add_executable (arb_uniform_buffer_object-layout-std140 layout-std140.c)
+add_executable (arb_uniform_buffer_object-maxblocks maxblocks.c)
add_executable (arb_uniform_buffer_object-minmax minmax.c)
add_executable (arb_uniform_buffer_object-negative-bindbuffer-index negative-bindbuffer-index.c)
add_executable (arb_uniform_buffer_object-negative-bindbuffer-buffer negative-bindbuffer-buffer.c)
diff --git a/tests/spec/arb_uniform_buffer_object/maxblocks.c b/tests/spec/arb_uniform_buffer_object/maxblocks.c
new file mode 100644
index 0000000..91d63a9
--- /dev/null
+++ b/tests/spec/arb_uniform_buffer_object/maxblocks.c
@@ -0,0 +1,336 @@
+/*
+ * 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 maxblocks.c
+ *
+ * From the GL_ARB_uniform_buffer_object spec:
+ *
+ * "There is a set of implementation-dependent maximums for the
+ * number of active uniform blocks used by each shader (vertex,
+ * fragment, geometry). If the number of uniform blocks used by
+ * any shader in the program exceeds its corresponding limit, the
+ * program will fail to link. The limits for vertex, fragment,
+ * and geometry shaders can be obtained by calling GetIntegerv
+ * with <pname> values of MAX_VERTEX_UNIFORM_BLOCKS,
+ * MAX_FRAGMENT_UNIFORM_BLOCKS, and MAX_GEOMETRY_UNIFORM_BLOCKS,
+ * respectively.
+ *
+ * Additionally, there is an implementation-dependent limit on
+ * the sum of the number of active uniform blocks used by each
+ * shader of a program. If a uniform block is used by multiple
+ * shaders, each such use counts separately against this combined
+ * limit. The combined uniform block use limit can be obtained
+ * by calling GetIntegerv with a <pname> of
+ * MAX_COMBINED_UNIFORM_BLOCKS."
+ */
+
+#define _GNU_SOURCE
+#include "piglit-util.h"
+
+PIGLIT_GL_TEST_MAIN(
+ 500 /*window_width*/,
+ 100 /*window_height*/,
+ GLUT_RGB | GLUT_DOUBLE | GLUT_ALPHA)
+
+static char *
+get_shader(GLenum target, const char *block_prefix, int blocks)
+{
+ char *shader;
+ const char *vs_source =
+ "#extension GL_ARB_uniform_buffer_object : enable\n"
+ "\n"
+ "varying vec4 v;"
+ "\n"
+ "%s"
+ "\n"
+ "void main() {\n"
+ " gl_Position = gl_Vertex;\n"
+ " v = vec4(0)%s;\n"
+ "}\n";
+ const char *fs_source =
+ "#extension GL_ARB_uniform_buffer_object : enable\n"
+ "\n"
+ "varying vec4 v;"
+ "\n"
+ "%s"
+ "\n"
+ "void main() {\n"
+ " gl_FragColor = v%s;\n"
+ "}\n";
+ const char *prefix_template =
+ "layout(std140) uniform %s_block%d {\n"
+ " vec4 %s_var%d;\n"
+ "};\n";
+ const char *body_template =
+ " + %s_var%d";
+ char *prefix, *prefix_tail, *body, *body_tail;
+ int i;
+
+ prefix = calloc(1, (strlen(block_prefix) * 2 + strlen(prefix_template) +
+ 20) * blocks);
+ body = calloc(1, (strlen(block_prefix) + strlen(body_template) +
+ 20) * blocks);
+ prefix_tail = prefix;
+ prefix[0] = 0;
+ body_tail = body;
+ body[0] = 0;
+
+ for (i = 0; i < blocks; i++) {
+ prefix_tail += sprintf(prefix_tail, prefix_template,
+ block_prefix, i,
+ block_prefix, i);
+ body_tail += sprintf(body_tail, body_template,
+ block_prefix, i);
+ }
+
+ switch (target) {
+ case GL_VERTEX_SHADER:
+ asprintf(&shader, vs_source, prefix, body);
+ break;
+ case GL_FRAGMENT_SHADER:
+ asprintf(&shader, fs_source, prefix, body);
+ break;
+ default:
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ free(prefix);
+ free(body);
+
+ return shader;
+}
+
+static GLuint
+build_shaders(const char *vs_prefix, int vs_blocks,
+ const char *fs_prefix, int fs_blocks)
+{
+ char *vs_source, *fs_source;
+ GLuint vs, fs, prog;
+
+ vs_source = get_shader(GL_VERTEX_SHADER, vs_prefix, vs_blocks);
+ fs_source = get_shader(GL_FRAGMENT_SHADER, fs_prefix, fs_blocks);
+
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
+ if (!vs) {
+ fprintf(stderr, "Failed to compile VS:\n%s", vs_source);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
+ if (!fs) {
+ fprintf(stderr, "Failed to compile FS:\n%s", fs_source);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ prog = glCreateProgram();
+ if (vs)
+ glAttachShader(prog, vs);
+ if (fs)
+ glAttachShader(prog, fs);
+ glLinkProgram(prog);
+
+ if (!piglit_link_check_status_quiet(prog)) {
+ glDeleteProgram(prog);
+ prog = 0;
+ }
+
+ glDeleteShader(vs);
+ glDeleteShader(fs);
+
+ return prog;
+}
+
+static bool
+fail_link_test(const char *vs_prefix, int vs_blocks,
+ const char *fs_prefix, int fs_blocks)
+{
+ GLuint prog;
+
+ prog = build_shaders(vs_prefix, vs_blocks,
+ fs_prefix, fs_blocks);
+
+ if (prog) {
+ printf("linked with (%d, %d) blocks, should have failed\n",
+ vs_blocks, fs_blocks);
+ return false;
+ }
+
+ glDeleteProgram(prog);
+ return true;
+}
+
+static bool
+test_draw(int y_index, GLuint prog,
+ GLuint *bos, int test_block, int active_blocks)
+{
+ float black[4] = {0, 0, 0, 0};
+ /* Color values have to be 0 or 1, since in the case of a
+ * shared block between VS and FS, they'll be added twice.
+ */
+ float other_colors[][4] = {
+ {1, 0, 0, 0},
+ {0, 1, 0, 0},
+ {0, 0, 1, 0},
+ {1, 1, 1, 1},
+ };
+ float *color;
+ int screen_w = 10;
+ int screen_h = 10;
+ int screen_x = screen_w * (1 + 2 * test_block);
+ int screen_y = screen_h * (1 + 2 * y_index);
+ float x = -1.0 + 2.0 * screen_x / piglit_width;
+ float y = -1.0 + 2.0 * screen_y / piglit_height;
+ float w = 2.0 * screen_w / piglit_width;
+ float h = 2.0 * screen_h / piglit_height;
+ int i;
+ float *expected_color;
+
+ expected_color = other_colors[test_block % ARRAY_SIZE(other_colors)];
+
+ for (i = 0; i < active_blocks; i++) {
+ if (i == test_block)
+ color = expected_color;
+ else
+ color = black;
+
+ glBindBuffer(GL_UNIFORM_BUFFER, bos[i]);
+ glBufferData(GL_UNIFORM_BUFFER,
+ 4 * sizeof(float), color, GL_DYNAMIC_DRAW);
+ }
+
+ piglit_draw_rect(x, y, w, h);
+
+ if (screen_x + screen_w >= piglit_width ||
+ screen_y + screen_h >= piglit_height) {
+ return true;
+ }
+
+ return piglit_probe_rect_rgba(screen_x, screen_y,
+ screen_w, screen_h, expected_color);
+}
+
+static bool
+pass_link_test(int y_index,
+ const char *vs_prefix, int vs_blocks,
+ const char *fs_prefix, int fs_blocks)
+{
+ bool pass = true;
+ GLuint prog;
+ GLuint bos[vs_blocks + fs_blocks];
+ GLint active_blocks;
+ int i;
+
+ memset(bos, 0, sizeof(bos));
+
+ prog = build_shaders(vs_prefix, vs_blocks,
+ fs_prefix, fs_blocks);
+
+ if (!prog) {
+ printf("shader with (%d, %d) blocks failed to link\n",
+ vs_blocks, fs_blocks);
+ return false;
+ }
+
+ glUseProgram(prog);
+ glGetProgramiv(prog, GL_ACTIVE_UNIFORM_BLOCKS, &active_blocks);
+ glGenBuffers(active_blocks, bos);
+ for (i = 0; i < active_blocks; i++) {
+ glUniformBlockBinding(prog, i, i);
+ glBindBufferBase(GL_UNIFORM_BUFFER, i, bos[i]);
+ }
+
+ for (i = 0; i < active_blocks; i++) {
+ if (!test_draw(y_index, prog, bos, i, active_blocks)) {
+ pass = false;
+ }
+ }
+
+ glDeleteBuffers(active_blocks, bos);
+ glDeleteProgram(prog);
+
+ return pass;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+ GLint max_vs, max_fs, max_combined;
+
+ piglit_require_extension("GL_ARB_uniform_buffer_object");
+
+ glGetIntegerv(GL_MAX_VERTEX_UNIFORM_BLOCKS, &max_vs);
+ glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_BLOCKS, &max_fs);
+ glGetIntegerv(GL_MAX_COMBINED_UNIFORM_BLOCKS, &max_combined);
+ printf("Max VS uniform blocks: %d\n", max_vs);
+ printf("Max FS uniform blocks: %d\n", max_fs);
+ printf("Max combined uniform blocks: %d\n", max_combined);
+
+ glClearColor(0.5, 0.5, 0.5, 0.5);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ pass = fail_link_test("vs", max_vs + 1,
+ "vs", 0) && pass;
+ pass = fail_link_test("fs", 0,
+ "fs", max_fs + 1) && pass;
+ if (max_vs + max_fs > max_combined) {
+ pass = fail_link_test("vs",
+ max_vs,
+ "fs",
+ max_combined + 1 - max_vs) && pass;
+
+ pass = fail_link_test("shared",
+ max_vs,
+ "shared",
+ max_combined + 1 - max_vs) && pass;
+ }
+
+ pass = pass_link_test(0,
+
+ "vs", max_vs,
+ "vs", 0) && pass;
+
+ pass = pass_link_test(1,
+ "fs", 0,
+ "fs", max_fs) && pass;
+
+ pass = pass_link_test(2,
+ "vs", max_vs,
+ "fs", MIN2(max_fs,
+ max_combined - max_vs)) && pass;
+
+ pass = pass_link_test(3,
+ "shared", max_vs,
+ "shared", MIN2(max_fs,
+ max_combined - max_vs)) && pass;
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+}
--
1.7.10
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