For patches 3-4:
Acked-by: Marek Olšák <marek.ol...@amd.com>
Marek
On Thu, Sep 13, 2018 at 2:11 PM Nicolai Hähnle <nhaeh...@gmail.com> wrote:
>
> From: Nicolai Hähnle <nicolai.haeh...@amd.com>
>
> Test extremes of GS amplification under tessellation.
> ---
> tests/opengl.py | 1 +
> .../arb_tessellation_shader/CMakeLists.gl.txt | 1 +
> .../tes-gs-max-output.cpp | 817 ++++++++++++++++++
> 3 files changed, 819 insertions(+)
> create mode 100644 tests/spec/arb_tessellation_shader/tes-gs-max-output.cpp
>
> diff --git a/tests/opengl.py b/tests/opengl.py
> index 903a95809..3cc25c99c 100644
> --- a/tests/opengl.py
> +++ b/tests/opengl.py
> @@ -1524,20 +1524,21 @@ with profile.test_list.group_manager(
> g(['arb_tessellation_shader-immediate-mode-draw-patches'])
> g(['arb_tessellation_shader-invalid-get-program-params'])
> g(['arb_tessellation_shader-invalid-patch-vertices-range'])
> g(['arb_tessellation_shader-invalid-primitive'])
> g(['built-in-constants',
> os.path.join('spec', 'arb_tessellation_shader',
> 'minimum-maximums.txt')],
> 'built-in-constants',
> override_class=BuiltInConstantsTest)
> g(['arb_tessellation_shader-large-uniforms'])
> g(['arb_tessellation_shader-layout-mismatch'])
> + g(['arb_tessellation_shader-tes-gs-max-output', '-small', '-scan', '1',
> '50'])
>
> # Group ARB_texture_multisample
> with profile.test_list.group_manager(
> PiglitGLTest, grouptools.join('spec', 'ARB_texture_multisample')) as
> g:
> g(['arb_texture_multisample-large-float-texture'], 'large-float-texture',
> run_concurrent=False)
> g(['arb_texture_multisample-large-float-texture', '--array'],
> 'large-float-texture-array', run_concurrent=False)
> g(['arb_texture_multisample-large-float-texture', '--fp16'],
> 'large-float-texture-fp16', run_concurrent=False)
> diff --git a/tests/spec/arb_tessellation_shader/CMakeLists.gl.txt
> b/tests/spec/arb_tessellation_shader/CMakeLists.gl.txt
> index d70b00f3f..058a1bc49 100644
> --- a/tests/spec/arb_tessellation_shader/CMakeLists.gl.txt
> +++ b/tests/spec/arb_tessellation_shader/CMakeLists.gl.txt
> @@ -11,12 +11,13 @@ link_libraries (
>
> piglit_add_executable (arb_tessellation_shader-get-tcs-params
> get-tcs-params.c)
> piglit_add_executable (arb_tessellation_shader-get-tes-params
> get-tes-params.c)
> piglit_add_executable (arb_tessellation_shader-immediate-mode-draw-patches
> immediate-mode-draw-patches.c)
> piglit_add_executable (arb_tessellation_shader-invalid-get-program-params
> invalid-get-program-params.c)
> piglit_add_executable (arb_tessellation_shader-invalid-patch-vertices-range
> invalid-patch-vertices-range.c)
> piglit_add_executable (arb_tessellation_shader-invalid-primitive
> invalid-primitive.c)
> piglit_add_executable (arb_tessellation_shader-minmax minmax.c)
> piglit_add_executable (arb_tessellation_shader-large-uniforms
> large-uniforms.c)
> piglit_add_executable (arb_tessellation_shader-layout-mismatch
> layout-mismatch.c)
> +piglit_add_executable (arb_tessellation_shader-tes-gs-max-output
> tes-gs-max-output.cpp)
>
> # vim: ft=cmake:
> diff --git a/tests/spec/arb_tessellation_shader/tes-gs-max-output.cpp
> b/tests/spec/arb_tessellation_shader/tes-gs-max-output.cpp
> new file mode 100644
> index 000000000..de0d2daf1
> --- /dev/null
> +++ b/tests/spec/arb_tessellation_shader/tes-gs-max-output.cpp
> @@ -0,0 +1,817 @@
> +/*
> + * Copyright (c) 2018 Advanced Micro Devices
> + *
> + * 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 tes-gs-max-output.cpp
> + *
> + * Stress the limits of what tessellation + geometry shaders can output using
> + * generic shaders with points as input and output primitives, allowing
> + * arbitrary:
> + * - number of input instances (instanced draws)
> + * - number of input patches per instance
> + * - (integer) tessellation factors
> + * - number of invocations (GS instances)
> + * - number of output vertices per invocation
> + * - number of output components per vertex
> + *
> + * Verification works by rendering points and writing to an SSBO from the
> + * fragment shader.
> + */
> +
> +#include "piglit-util-gl.h"
> +
> +#include <algorithm>
> +#include <map>
> +#include <set>
> +#include <vector>
> +
> +#define WINDOW_SIZE 256
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> + config.supports_gl_compat_version = 32;
> + config.supports_gl_core_version = 32;
> + config.window_width = WINDOW_SIZE;
> + config.window_height = WINDOW_SIZE;
> + config.window_visual = PIGLIT_GL_VISUAL_DOUBLE |
> PIGLIT_GL_VISUAL_RGBA;
> + config.khr_no_error_support = PIGLIT_NO_ERRORS;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +#define PASTE(x) #x
> +#define STR(x) PASTE(x)
> +
> +struct testcase {
> + unsigned num_instances; /* draw instances */
> + unsigned num_patches; /* draw size / count */
> + unsigned tessfactor_u;
> + unsigned tessfactor_v;
> + unsigned num_invocations; /* GS invocations / instances */
> + unsigned num_outputs; /* # vertex ouput per GS invocation */
> + unsigned num_extra_components; /* # extra components per GS output
> vertex */
> +
> + bool operator<(const testcase &o) const {
> + return std::make_tuple(num_instances, num_patches,
> tessfactor_u,
> + tessfactor_v, num_invocations,
> num_outputs,
> + num_extra_components)
> + <
> + std::make_tuple(o.num_instances, o.num_patches,
> o.tessfactor_u,
> + o.tessfactor_v, o.num_invocations,
> o.num_outputs,
> + o.num_extra_components);
> + }
> +};
> +
> +struct fragmentshaderkey {
> + unsigned num_extra_components;
> +
> + bool operator<(const fragmentshaderkey &o) const {
> + return num_extra_components < o.num_extra_components;
> + }
> +};
> +
> +struct geometryshaderkey {
> + unsigned num_invocations;
> + unsigned num_outputs;
> + unsigned num_extra_components;
> +
> + bool operator<(const geometryshaderkey &o) const {
> + if (num_invocations < o.num_invocations)
> + return true;
> + if (num_invocations > o.num_invocations)
> + return false;
> + if (num_outputs < o.num_outputs)
> + return true;
> + if (num_outputs > o.num_outputs)
> + return false;
> + return num_extra_components < o.num_extra_components;
> + }
> +};
> +
> +static std::map<fragmentshaderkey, GLuint> fragmentshaders;
> +static std::map<geometryshaderkey, GLuint> testprograms;
> +
> +static const struct testcase default_testcase = {
> + .num_instances = 1,
> + .num_patches = 1,
> + .tessfactor_u = 1,
> + .tessfactor_v = 1,
> + .num_invocations = 1,
> + .num_outputs = 1,
> + .num_extra_components = 0,
> +};
> +
> +static int32_t *buffer_copy;
> +
> +static const unsigned max_final_points = 2 * 1024 * 1024; /* requires 16 MiB
> buffer */
> +static bool small = false;
> +static GLuint vs_shader;
> +static GLuint tcs_shader;
> +static GLuint tes_shader;
> +static GLuint vao;
> +static GLuint ssbo;
> +static std::vector<testcase> testcases;
> +static std::set<testcase> testcases_set;
> +static GLuint max_tessfactor;
> +static GLuint max_gs_invocations;
> +static GLuint max_gs_out_vertices;
> +static GLuint max_gs_total_out_components;
> +static GLuint max_gs_out_components;
> +static unsigned max_gs_out_vertices_real;
> +
> +static const char vs_text[] =
> + "#version 150\n"
> + "\n"
> + "uniform int u_verts_per_instance;\n"
> + "\n"
> + "out int vs_tcs_id;\n"
> + "\n"
> + "void main() {\n"
> + " vs_tcs_id = gl_InstanceID * u_verts_per_instance + gl_VertexID;\n"
> + "}\n";
> +
> +static const char tcs_text[] =
> + "#version 150\n"
> + "#extension GL_ARB_tessellation_shader : require\n"
> + "layout(vertices = 1) out;\n"
> + "\n"
> + "in int vs_tcs_id[];\n"
> + "\n"
> + "out int tcs_tes_id[];\n"
> + "\n"
> + "uniform int u_tessfactor_u;\n"
> + "uniform int u_tessfactor_v;\n"
> + "\n"
> + "void main() {\n"
> + " tcs_tes_id[gl_InvocationID] = vs_tcs_id[gl_InvocationID];\n"
> + " gl_TessLevelOuter[0] = u_tessfactor_v;\n"
> + " gl_TessLevelOuter[1] = u_tessfactor_u;\n"
> + "}\n";
> +
> +static const char tes_text[] =
> + "#version 150\n"
> + "#extension GL_ARB_tessellation_shader : require\n"
> + "layout(isolines, equal_spacing) in;\n"
> + "\n"
> + "in int tcs_tes_id[];\n"
> + "\n"
> + "out int tes_gs_id;\n"
> + "\n"
> + "void main() {\n"
> + " tes_gs_id = tcs_tes_id[0];\n"
> + " gl_Position.x = gl_TessCoord[0];\n"
> + " gl_Position.y = gl_TessCoord[1];\n"
> + "}\n";
> +
> +/* Those numbers really don't matter much for what we're trying to do here.
> */
> +#define GEN_SEQUENCE \
> + "int seq_next(int x) {\n" \
> + " x = (x + 1) * 709900053;\n" \
> + " x = x ^ (x >> 17);\n" \
> + " return x;\n" \
> + "}\n"
> +
> +static const char gs_text[] =
> + "#version 150\n"
> + "#extension GL_ARB_gpu_shader5 : require\n"
> + "\n"
> + "#define NUM_INVOCATIONS %d\n"
> + "#define NUM_OUT_VERTICES %d\n"
> + "#define NUM_EXTRA_COMPONENTS %d\n"
> + "\n"
> + "layout(lines, invocations = NUM_INVOCATIONS) in;\n"
> + "layout(points, max_vertices = NUM_OUT_VERTICES) out;\n"
> + "\n"
> + "uniform int u_tessfactor_u;\n"
> + "uniform int u_tessfactor_v;\n"
> + "\n"
> + "in int tes_gs_id[];\n"
> + "\n"
> + "flat out int gs_ps_data[1 + NUM_EXTRA_COMPONENTS];\n"
> + "\n"
> + GEN_SEQUENCE
> + "\n"
> + "void main() {\n"
> + " int in_id = tes_gs_id[0] * u_tessfactor_u * u_tessfactor_v;\n"
> + " float v = gl_in[0].gl_Position.y;\n"
> + " in_id += u_tessfactor_u * int(v * u_tessfactor_v + 0.5);\n"
> + " float u = min(gl_in[0].gl_Position.x, gl_in[1].gl_Position.x);\n"
> + " in_id += int(u * u_tessfactor_u + 0.5);\n"
> + "\n"
> + " for (int i = 0; i < NUM_OUT_VERTICES; ++i) {\n"
> + " uint id = (in_id * NUM_INVOCATIONS + gl_InvocationID) *
> NUM_OUT_VERTICES + i;\n"
> + " uint x = id %% " STR(WINDOW_SIZE) "u;\n"
> + " uint y = (id / " STR(WINDOW_SIZE) "u) %% " STR(WINDOW_SIZE)
> "u;\n"
> + " gl_Position.x = (float(x) + 0.5) / " STR(WINDOW_SIZE) " * 2.0 -
> 1.0;\n"
> + " gl_Position.y = (float(y) + 0.5) / " STR(WINDOW_SIZE) " * 2.0 -
> 1.0;\n"
> + " gl_Position.z = 0.0;\n"
> + " gl_Position.w = 1.0;\n"
> + "\n"
> + " int val = int(id);\n"
> + " for (int j = 0; j <= NUM_EXTRA_COMPONENTS; ++j) {\n"
> + " gs_ps_data[j] = val;\n"
> + " val = seq_next(val);\n"
> + " }\n"
> + "\n"
> + " EmitVertex();\n"
> + " }\n"
> + "}\n";
> +
> +static const char fs_text[] =
> + "#version 150\n"
> + "#extension GL_ARB_shader_storage_buffer_object : require\n"
> + "\n"
> + "#define NUM_EXTRA_COMPONENTS %d\n"
> + "\n"
> + "flat in int gs_ps_data[1 + NUM_EXTRA_COMPONENTS];\n"
> + "out vec4 out_color;\n"
> + "\n"
> + "layout(std430, binding = 0) buffer SSBO {\n"
> + " ivec2 data[];\n"
> + "} ssbo;\n"
> + "\n"
> + GEN_SEQUENCE
> + "\n"
> + "void main() {\n"
> + " int id = gs_ps_data[0];\n"
> + " int screen_id = int(gl_FragCoord.y) * " STR(WINDOW_SIZE) " +
> int(gl_FragCoord.x);\n"
> + " if (screen_id != id %% (" STR(WINDOW_SIZE * WINDOW_SIZE) ")) {\n"
> + " ssbo.data[id].x = 1000;\n"
> + " ssbo.data[id].y = screen_id;\n"
> + " out_color = vec4(0.1, 0, 0, 1);\n"
> + " return;\n"
> + " }\n"
> + "\n"
> + " int val = id;\n"
> + " for (int j = 0; j <= NUM_EXTRA_COMPONENTS; ++j) {\n"
> + " if (val != gs_ps_data[j]) {\n"
> + " ssbo.data[id].x = 2000 + j;\n"
> + " ssbo.data[id].y = gs_ps_data[j];\n"
> + " out_color = vec4(0, 0.1, 0, 1);\n"
> + " return;\n"
> + " }\n"
> + " val = seq_next(val);\n"
> + " }\n"
> + "\n"
> + " ssbo.data[id].x = 1;\n"
> + " out_color = vec4(0, 0, 0, 1);\n"
> + "}\n";
> +
> +static void
> +print_testcase(const struct testcase *tc)
> +{
> + printf("Case: instances = %u patches = %u tessfactor = %u,%u
> invocations = %u "
> + "outputs = %u extra_components = %u\n",
> + tc->num_instances, tc->num_patches, tc->tessfactor_u,
> tc->tessfactor_v,
> + tc->num_invocations, tc->num_outputs,
> tc->num_extra_components);
> +}
> +
> +static void
> +add_testcase(const struct testcase *tc)
> +{
> + if (!testcases_set.insert(*tc).second)
> + return;
> +
> + if (tc->num_instances > 64 * 1024 ||
> + tc->num_patches > 64 * 1024 ||
> + tc->tessfactor_u > 64 * 1024 ||
> + tc->tessfactor_v > 64 * 1024 ||
> + tc->num_invocations > 64 * 1024 ||
> + tc->num_outputs > 64 * 1024 ||
> + tc->num_extra_components > 64 * 1024) {
> + fprintf(stderr, "Excessive test case size. Are you sure?\n");
> + print_testcase(tc);
> + exit(1);
> + }
> +
> + /* Multiple separate multiplies to avoid integer wraparound */
> + if ((uint64_t)tc->num_instances * tc->num_patches * tc->tessfactor_u
> > max_final_points ||
> + (uint64_t)tc->tessfactor_v * tc->num_invocations *
> tc->num_outputs > max_final_points ||
> + (uint64_t)tc->num_instances * tc->num_patches * tc->tessfactor_u *
> + tc->tessfactor_v * tc->num_invocations * tc->num_outputs >
> max_final_points) {
> + fprintf(stderr, "Test case has more than %u final points.\n",
> max_final_points);
> + print_testcase(tc);
> + exit(1);
> + }
> +
> + /* Check against implementation-defined limits. */
> + if (tc->tessfactor_u > max_tessfactor || tc->tessfactor_v >
> max_tessfactor) {
> + fprintf(stderr, "Tessellation factor too high (max: %u)\n",
> + max_tessfactor);
> + print_testcase(tc);
> + exit(1);
> + }
> + if (tc->num_outputs > max_gs_out_vertices) {
> + fprintf(stderr, "Too many output vertices (max: %d)\n",
> + max_gs_out_vertices);
> + print_testcase(tc);
> + exit(1);
> + }
> + if (tc->num_outputs * (5 + tc->num_extra_components) >
> max_gs_total_out_components) {
> + fprintf(stderr, "Too many output components (max: %d)\n",
> + max_gs_total_out_components);
> + print_testcase(tc);
> + exit(1);
> + }
> + if (tc->num_invocations > max_gs_invocations) {
> + fprintf(stderr, "Too many GS invocations (max: %d)\n",
> + max_gs_invocations);
> + print_testcase(tc);
> + exit(1);
> + }
> +
> + /* Compile GS shader and link program */
> + geometryshaderkey gskey;
> + gskey.num_invocations = tc->num_invocations;
> + gskey.num_outputs = tc->num_outputs;
> + gskey.num_extra_components = tc->num_extra_components;
> + if (testprograms.find(gskey) == testprograms.end()) {
> + char *text;
> +
> + fragmentshaderkey fskey;
> + fskey.num_extra_components = tc->num_extra_components;
> + auto fsit = fragmentshaders.find(fskey);
> + if (fsit == fragmentshaders.end()) {
> + if (asprintf(&text, fs_text,
> tc->num_extra_components) < 0)
> + abort();
> + GLuint fs_shader =
> +
> piglit_compile_shader_text(GL_FRAGMENT_SHADER, text);
> + free(text);
> +
> + fsit = fragmentshaders.insert(std::make_pair(fskey,
> fs_shader)).first;
> + }
> +
> + if (asprintf(&text, gs_text, tc->num_invocations,
> tc->num_outputs,
> + tc->num_extra_components) < 0)
> + abort();
> + GLuint gs_shader =
> + piglit_compile_shader_text(GL_GEOMETRY_SHADER, text);
> + free(text);
> +
> + GLuint prog = glCreateProgram();
> + glAttachShader(prog, vs_shader);
> + glAttachShader(prog, tcs_shader);
> + glAttachShader(prog, tes_shader);
> + glAttachShader(prog, gs_shader);
> + glAttachShader(prog, fsit->second);
> + glLinkProgram(prog);
> + if (!piglit_link_check_status(prog))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + glDeleteShader(gs_shader);
> +
> + testprograms.insert(std::make_pair(gskey, prog));
> + }
> +
> + testcases.push_back(*tc);
> +}
> +
> +static bool
> +run_testcase(const struct testcase *tc)
> +{
> + unsigned final_points = tc->num_instances * tc->num_patches *
> tc->tessfactor_u *
> + tc->tessfactor_v * tc->num_invocations *
> tc->num_outputs;
> + unsigned bufsize = 2 * sizeof(int32_t) * final_points;
> +
> + print_testcase(tc);
> +
> + glClearColor(0, 0, 0, 1);
> + glClear(GL_COLOR_BUFFER_BIT);
> +
> + geometryshaderkey gskey;
> + gskey.num_invocations = tc->num_invocations;
> + gskey.num_outputs = tc->num_outputs;
> + gskey.num_extra_components = tc->num_extra_components;
> + auto progit = testprograms.find(gskey);
> + assert(progit != testprograms.end());
> +
> + glUseProgram(progit->second);
> + glPatchParameteri(GL_PATCH_VERTICES, 1);
> + glUniform1i(glGetUniformLocation(progit->second, "u_tessfactor_u"),
> + tc->tessfactor_u);
> + glUniform1i(glGetUniformLocation(progit->second, "u_tessfactor_v"),
> + tc->tessfactor_v);
> + glUniform1i(glGetUniformLocation(progit->second,
> "u_verts_per_instance"),
> + tc->num_patches);
> +
> + glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);
> +
> + memset(buffer_copy, 0, bufsize);
> + glBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, bufsize, buffer_copy);
> +
> + glEnable(GL_BLEND);
> + glBlendFunc(GL_ONE, GL_ONE);
> +
> + glDrawArraysInstanced(GL_PATCHES, 0, tc->num_patches,
> tc->num_instances);
> +
> + glDisable(GL_BLEND);
> +
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + return false;
> +
> + static const float expected[] = { 0, 0, 0, 1 };
> + bool ok = true;
> +
> + if (!piglit_probe_rect_rgba(0, 0, WINDOW_SIZE, WINDOW_SIZE, expected))
> + ok = false;
> +
> + glGetBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, bufsize, buffer_copy);
> +
> + for (unsigned i = 0; i < final_points; ++i) {
> + if (buffer_copy[2 * i] != 1) {
> + printf("Error @ %d: %d %d\n", i,
> + buffer_copy[2 * i], buffer_copy[2 * i + 1]);
> + ok = false;
> + }
> + }
> +
> + return ok;
> +}
> +
> +
> +static void
> +generate_testcases_max2(const testcase &tc, bool explicit_instances, bool
> explicit_patches)
> +{
> + unsigned amplify = tc.tessfactor_u * tc.tessfactor_v *
> tc.num_invocations * tc.num_outputs;
> + unsigned target_in = max_final_points / amplify;
> +
> + if (small)
> + target_in = MIN2(4, target_in);
> +
> + if (!explicit_instances) {
> + testcase tc1 = tc;
> + tc1.num_instances = MAX2(1, target_in / tc1.num_patches);
> + add_testcase(&tc1);
> + }
> +
> + if (!explicit_patches) {
> + testcase tc1 = tc;
> + tc1.num_patches = MAX2(1, target_in / tc1.num_instances);
> + add_testcase(&tc1);
> + }
> +
> + if (!explicit_instances && !explicit_patches) {
> + testcase tc1 = tc;
> + tc1.num_instances = MAX2(1, (unsigned)sqrt(target_in));
> + tc1.num_patches = MAX2(1, target_in / tc1.num_instances);
> + add_testcase(&tc1);
> + }
> +
> + if (explicit_instances && explicit_patches)
> + add_testcase(&tc);
> +}
> +
> +static void
> +generate_testcases_max1(const testcase &tc, bool explicit_instances, bool
> explicit_patches,
> + bool explicit_tessfactor_u, bool
> explicit_tessfactor_v,
> + unsigned tess_out_max)
> +{
> + if (!explicit_tessfactor_u) {
> + testcase tc1 = tc;
> + tc1.tessfactor_u = MIN2(MAX2(1, tess_out_max /
> tc1.tessfactor_v),
> + max_tessfactor);
> + generate_testcases_max2(tc1, explicit_instances,
> explicit_patches);
> + }
> +
> + if (!explicit_tessfactor_v) {
> + testcase tc1 = tc;
> + tc1.tessfactor_v = MIN2(MAX2(1, tess_out_max /
> tc1.tessfactor_u),
> + max_tessfactor);
> + generate_testcases_max2(tc1, explicit_instances,
> explicit_patches);
> + }
> +
> + if (!explicit_tessfactor_u && !explicit_tessfactor_v) {
> + testcase tc1 = tc;
> + tc1.tessfactor_u = MIN2(MAX2(1, (unsigned)sqrt(tess_out_max)),
> + max_tessfactor);
> + tc1.tessfactor_v = MIN2(MAX2(1, tess_out_max /
> tc1.tessfactor_u),
> + max_tessfactor);
> + generate_testcases_max2(tc1, explicit_instances,
> explicit_patches);
> + }
> +
> + if (explicit_tessfactor_u && explicit_tessfactor_v)
> + generate_testcases_max2(tc, explicit_instances,
> explicit_patches);
> +}
> +
> +static void
> +generate_testcases_max(const testcase &tc, bool explicit_instances, bool
> explicit_patches,
> + bool explicit_tessfactor_u, bool explicit_tessfactor_v)
> +{
> + unsigned amplify = tc.num_invocations * tc.num_outputs;
> + unsigned tess_out_max = max_final_points / amplify;
> +
> + if (small) {
> + generate_testcases_max1(tc, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v,
> + MIN2(4, tess_out_max));
> + } else {
> + generate_testcases_max1(tc, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v,
> + tess_out_max);
> + while (tess_out_max > 4) {
> + tess_out_max = sqrt(tess_out_max);
> + generate_testcases_max1(tc, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v,
> + tess_out_max);
> + }
> + }
> +}
> +
> +static float
> +rand_subdivide(int partitions)
> +{
> + double x = 1.0;
> +
> + for (int i = 1; i < partitions; ++i)
> + x = std::min(x, (double)rand() / ((double)RAND_MAX + 1));
> +
> + return x;
> +}
> +
> +void
> +piglit_init(int argc, char **argv)
> +{
> + bool explicit_instances = false;
> + bool explicit_patches = false;
> + bool explicit_tessfactor_u = false;
> + bool explicit_tessfactor_v = false;
> + bool explicit_invocations = false;
> + bool explicit_outputs = false;
> + bool explicit_components = false;
> + bool scan_mode = false;
> + unsigned scan_seed = 0;
> + unsigned scan_count = 0;
> + struct testcase explicit_testcase;
> +
> + piglit_require_extension("GL_ARB_tessellation_shader");
> + piglit_require_extension("GL_ARB_shader_storage_buffer_object");
> +
> + memcpy(&explicit_testcase, &default_testcase,
> sizeof(explicit_testcase));
> +
> + int i;
> + for (i = 1; i < argc; ++i) {
> + if (!strcmp(argv[i], "-small")) {
> + small = true;
> + } else {
> + if (i + 1 >= argc)
> + break;
> +
> + if (!strcmp(argv[i], "-instances")) {
> + explicit_testcase.num_instances = atoi(argv[i
> + 1]);
> + explicit_instances = true;
> + i++;
> + } else if (!strcmp(argv[i], "-patches")) {
> + explicit_testcase.num_patches = atoi(argv[i +
> 1]);
> + explicit_patches = true;
> + i++;
> + } else if (!strcmp(argv[i], "-tessfactor_u")) {
> + explicit_testcase.tessfactor_u = atoi(argv[i
> + 1]);
> + explicit_tessfactor_u = true;
> + i++;
> + } else if (!strcmp(argv[i], "-tessfactor_v")) {
> + explicit_testcase.tessfactor_v = atoi(argv[i
> + 1]);
> + explicit_tessfactor_v = true;
> + i++;
> + } else if (!strcmp(argv[i], "-invocations")) {
> + explicit_testcase.num_invocations =
> atoi(argv[i + 1]);
> + explicit_invocations = true;
> + i++;
> + } else if (!strcmp(argv[i], "-outputs")) {
> + explicit_testcase.num_outputs = atoi(argv[i +
> 1]);
> + explicit_outputs = true;
> + i++;
> + } else if (!strcmp(argv[i], "-components")) {
> + explicit_testcase.num_extra_components =
> atoi(argv[i + 1]);
> + explicit_components = true;
> + i++;
> + } else {
> + if (i + 2 >= argc)
> + break;
> +
> + if (!strcmp(argv[i], "-scan")) {
> + scan_seed = atoi(argv[i + 1]);
> + scan_count = atoi(argv[i + 2]);
> + scan_mode = true;
> + i += 2;
> + } else
> + break;
> + }
> + }
> + }
> + if (i < argc) {
> + fprintf(stderr, "Unknown argument or too few params: %s\n",
> argv[i]);
> + exit(1);
> + }
> +
> + /* Various GL objects needed by the test */
> + vs_shader = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + tcs_shader = piglit_compile_shader_text(GL_TESS_CONTROL_SHADER,
> tcs_text);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + tes_shader = piglit_compile_shader_text(GL_TESS_EVALUATION_SHADER,
> tes_text);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + glGenVertexArrays(1, &vao);
> + glBindVertexArray(vao);
> +
> + glGenBuffers(1, &ssbo);
> + glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
> + glBufferData(GL_SHADER_STORAGE_BUFFER, max_final_points * 8, NULL,
> GL_DYNAMIC_READ);
> +
> + buffer_copy = (int32_t *)calloc(2 * sizeof(int32_t),
> max_final_points);
> +
> + glGetIntegerv(GL_MAX_TESS_GEN_LEVEL, (GLint*)&max_tessfactor);
> + glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_VERTICES,
> (GLint*)&max_gs_out_vertices);
> + glGetIntegerv(GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS,
> + (GLint*)&max_gs_total_out_components);
> + glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_COMPONENTS,
> + (GLint*)&max_gs_out_components);
> + glGetIntegerv(GL_MAX_GEOMETRY_SHADER_INVOCATIONS,
> (GLint*)&max_gs_invocations);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + max_gs_out_vertices_real = MIN2(max_gs_out_vertices,
> + max_gs_total_out_components / 5);
> +
> + if (scan_mode) {
> + srand(scan_seed);
> +
> + /* First, generate test cases that max out each of the
> dimensions */
> + testcase tc0 = explicit_testcase;
> + if (!explicit_invocations)
> + tc0.num_invocations = max_gs_invocations;
> +
> + if (!explicit_outputs) {
> + testcase tc1 = tc0;
> +
> + if (!explicit_components) {
> + tc1.num_outputs = max_gs_out_vertices_real;
> + tc1.num_extra_components =
> + MIN2(max_gs_total_out_components /
> tc1.num_outputs,
> + max_gs_out_components) - 5;
> + } else {
> + tc1.num_outputs =
> + MIN2(max_gs_total_out_components /
> + (5 + tc1.num_extra_components),
> + max_gs_out_vertices_real);
> + }
> +
> + generate_testcases_max(tc1, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v);
> + }
> +
> + if (!explicit_components) {
> + testcase tc1 = tc0;
> +
> + if (!explicit_outputs) {
> + tc1.num_extra_components =
> max_gs_out_components - 5;
> + tc1.num_outputs =
> + MIN2(max_gs_total_out_components /
> + (5 + tc1.num_extra_components),
> + max_gs_out_vertices_real);
> + } else {
> + tc1.num_extra_components =
> + MIN2(max_gs_total_out_components /
> tc1.num_outputs,
> + max_gs_out_components) - 4;
> + }
> +
> + generate_testcases_max(tc1, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v);
> + }
> +
> + if (explicit_outputs && explicit_components)
> + generate_testcases_max(tc0, explicit_instances,
> explicit_patches,
> + explicit_tessfactor_u,
> explicit_tessfactor_v);
> +
> + /* Generate additional tests randomly.
> + *
> + * Attempt to generate a random distribution that isn't too
> + * lop-sided, but admittedly this is all just hand-wavey
> + * heuristics.
> + */
> + while (testcases.size() < scan_count) {
> + testcase tc = explicit_testcase;
> +
> + if (!explicit_outputs || !explicit_components) {
> + if (explicit_outputs || rand() & 1) {
> + unsigned max_components =
> +
> MIN2(max_gs_total_out_components / tc.num_outputs,
> + max_gs_out_components) -
> 5;
> + tc.num_extra_components = rand() %
> (max_components + 1);
> +
> + if (!explicit_outputs) {
> + unsigned max_outputs =
> +
> MIN2(max_gs_total_out_components /
> + (5 +
> tc.num_extra_components),
> +
> max_gs_out_vertices_real);
> + tc.num_outputs = 1 + rand() %
> max_outputs;
> + }
> + } else {
> + unsigned max_outputs =
> +
> MIN2(max_gs_total_out_components /
> + (5 +
> tc.num_extra_components),
> +
> max_gs_out_vertices_real);
> + tc.num_outputs = 1 + rand() %
> max_outputs;
> +
> + if (!explicit_components) {
> + unsigned max_components =
> +
> MIN2(max_gs_total_out_components / tc.num_outputs,
> +
> max_gs_out_components) - 5;
> + tc.num_extra_components =
> rand() % (max_components + 1);
> + }
> + }
> + }
> +
> + unsigned amplify = tc.num_outputs;
> +
> + if (explicit_invocations)
> + amplify *= tc.num_invocations;
> + if (explicit_tessfactor_u)
> + amplify *= tc.tessfactor_u;
> + if (explicit_tessfactor_v)
> + amplify *= tc.tessfactor_v;
> + if (explicit_patches)
> + amplify *= tc.num_patches;
> + if (explicit_instances)
> + amplify *= tc.num_instances;
> +
> + unsigned target = max_final_points / amplify;
> +
> + if (small)
> + target = MIN2(32, target);
> +
> + if (!explicit_tessfactor_u) {
> + float tf_log_weight = logf(target) *
> rand_subdivide(6);
> + tc.tessfactor_u = MIN2(expf(tf_log_weight),
> max_tessfactor);
> + target /= tc.tessfactor_u;
> + }
> + if (!explicit_tessfactor_v) {
> + float tf_log_weight = logf(target) *
> rand_subdivide(6);
> + tc.tessfactor_v = MIN2(expf(tf_log_weight),
> max_tessfactor);
> + target /= tc.tessfactor_v;
> + }
> + if (!explicit_invocations) {
> + float log_weight = logf(target);
> + if (!explicit_instances || !explicit_patches)
> + log_weight *= rand_subdivide(2);
> + tc.num_invocations = MIN2(expf(log_weight),
> max_gs_invocations);
> + target /= tc.num_invocations;
> + }
> + if (!explicit_instances) {
> + float log_weight = logf(target);
> + if (!explicit_patches)
> + log_weight *= rand_subdivide(2);
> + tc.num_instances = expf(log_weight);
> + target /= tc.num_instances;
> + }
> + if (!explicit_patches)
> + tc.num_patches = 1 + rand() % target;
> +
> + add_testcase(&tc);
> + }
> + } else {
> + add_testcase(&explicit_testcase);
> + }
> +}
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> + bool pass = true;
> +
> + for (unsigned i = 0; i < testcases.size(); ++i) {
> + if (!run_testcase(&testcases[i]))
> + pass = false;
> + }
> +
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + pass = false;
> +
> + piglit_present_results();
> +
> + return pass ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> --
> 2.17.1
>
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> Piglit mailing list
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