Reviewed-by: Roland Scheidegger <srol...@vmware.com>
Am 24.12.2017 um 23:41 schrieb Brian Paul:
> Create the largest possible 2D GL_RGBA_32F multisampled texture, load it
> with known values the read it back and see if the values match up.
>
> The --array option runs the test with a 2D texture array instead of an
> MSAA texture. There are other options to specify texture size, number of
> samples, fp16 and a texel value scale.
>
> Fails with NVIDIA's driver. See code comments.
>
> Note: The entry in all.py limits the texture size to 512x512 so it runs
> in a reasonable amount of time. Ideally, the texture size should be set
> in quick.py instead but I've been unable to make that work.
>
> v2:
> * Fix a few code issues raised by Fabian Bieler, fix all.py, quick.py code.
> * Update comments about NVIDIA driver, per Roland.
> v3:
> * remove config.khr_no_error_support line.
> ---
> tests/all.py | 8 +
> tests/quick.py | 17 +
> .../spec/arb_texture_multisample/CMakeLists.gl.txt | 1 +
> .../arb_texture_multisample/large-float-texture.c | 727
> +++++++++++++++++++++
> 4 files changed, 753 insertions(+)
> create mode 100644 tests/spec/arb_texture_multisample/large-float-texture.c
>
> diff --git a/tests/all.py b/tests/all.py
> index 5d90e8f..d55cca9 100644
> --- a/tests/all.py
> +++ b/tests/all.py
> @@ -1651,6 +1651,14 @@ with profile.test_list.group_manager(
> # 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)
> + g(['arb_texture_multisample-large-float-texture', '--array', '--fp16'],
> + 'large-float-texture-array-fp16', run_concurrent=False)
> g(['arb_texture_multisample-minmax'])
> g(['texelFetch', 'fs', 'sampler2DMS', '4', '1x71-501x71'])
> g(['texelFetch', 'fs', 'sampler2DMS', '4', '1x130-501x130'])
> diff --git a/tests/quick.py b/tests/quick.py
> index 1a7d674..53774e4 100644
> --- a/tests/quick.py
> +++ b/tests/quick.py
> @@ -68,6 +68,23 @@ with profile.test_list.group_manager(
> with profile.test_list.allow_reassignment:
> g(['ext_texture_env_combine-combine', '--quick'],
> 'texture-env-combine')
>
> +# Limit texture size to 512x512 for some texture_multisample tests.
> +# The default (max supported size) can be pretty slow.
> +with profile.test_list.group_manager(
> + PiglitGLTest,
> + grouptools.join('spec', 'ARB_texture_multisample')) as g:
> + with profile.test_list.allow_reassignment:
> + size_arg = ['--texsize', '512']
> + g(['arb_texture_multisample-large-float-texture'] + size_arg,
> + 'large-float-texture', run_concurrent=False)
> + g(['arb_texture_multisample-large-float-texture', '--array'] +
> + size_arg, 'large-float-texture-array', run_concurrent=False)
> + g(['arb_texture_multisample-large-float-texture', '--fp16'] +
> + size_arg, 'large-float-texture-fp16', run_concurrent=False)
> + g(['arb_texture_multisample-large-float-texture', '--array',
> + '--fp16'] + size_arg,
> + 'large-float-texture-array-fp16', run_concurrent=False)
> +
> # These take too long
> profile.filters.append(lambda n, _: '-explosion' not in n)
> profile.filters.append(FilterVsIn())
> diff --git a/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
> b/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
> index a347143..31965c4 100644
> --- a/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
> +++ b/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
> @@ -9,6 +9,7 @@ link_libraries (
> ${OPENGL_gl_LIBRARY}
> )
>
> +piglit_add_executable (arb_texture_multisample-large-float-texture
> large-float-texture.c)
> piglit_add_executable (arb_texture_multisample-minmax minmax.c)
> piglit_add_executable (arb_texture_multisample-errors errors.c)
> piglit_add_executable (arb_texture_multisample-fb-completeness
> fb-completeness.c)
> diff --git a/tests/spec/arb_texture_multisample/large-float-texture.c
> b/tests/spec/arb_texture_multisample/large-float-texture.c
> new file mode 100644
> index 0000000..2e05a6e
> --- /dev/null
> +++ b/tests/spec/arb_texture_multisample/large-float-texture.c
> @@ -0,0 +1,727 @@
> +/*
> + * Copyright (c) 2017 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.
> + */
> +
> +/** @file large-float-texture.c
> + *
> + * Test large MSAA float textures. In particular, create/load a multisample
> + * texture then read it back and compare returned values.
> + * Also support array textures instead of MSAA as a sanity check / debug
> + * option.
> + *
> + * Some drivers/GPUs may fail this test. NVIDIA, for example, appears to
> + * only store the MSAA coverage info, not the sample colors, for samples
> + * beyond the 8th sample. We may tune the way this test operates over time
> + * to be more useful. Maybe we should test all MSAA samples/pixels (2x,
> + * 4x, 8x, etc).
> + *
> + * See code for command line arguments.
> + */
> +
> +#include "piglit-util-gl.h"
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> + config.supports_gl_compat_version = 30;
> + config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +
> +static bool verbose = false;
> +
> +
> +/**
> + * Try to create a GL_RGBA32F/16F texture of the given size, samples.
> + * Return 0 if failure.
> + */
> +static GLuint
> +create_texture(GLenum target, GLenum intFormat,
> + GLsizei width, GLsizei height, GLuint numSamples)
> +{
> + GLuint tex;
> +
> + assert(intFormat == GL_RGBA32F || intFormat == GL_RGBA16F);
> +
> + if (verbose) {
> + printf("Trying %d x %d %d samples/layers\n",
> + width, height, numSamples);
> + }
> +
> + glGenTextures(1, &tex);
> + glBindTexture(target, tex);
> + if (target == GL_TEXTURE_2D_MULTISAMPLE) {
> + glTexImage2DMultisample(target,
> + numSamples, intFormat, width, height,
> + GL_FALSE); /* fixedsamplelocations */
> + }
> + else {
> + /* instead of samples per pixel, use 'samples' layers */
> + assert(target == GL_TEXTURE_2D_ARRAY);
> + glTexStorage3D(target, 1, intFormat, width, height,
> + numSamples);
> + }
> +
> + if (glGetError() != GL_NO_ERROR) {
> + /* some error */
> + glDeleteTextures(1, &tex);
> + tex = 0;
> + }
> +
> + return tex;
> +}
> +
> +
> +/**
> + * Find the max working texture size.
> + */
> +static GLuint
> +create_texture_max_size(GLenum target, GLenum intFormat,
> + GLsizei *width, GLsizei *height,
> + GLuint numSamples)
> +{
> + GLint w, h;
> + GLuint tex = 0;
> +
> + w = *width;
> + h = *height;
> + while (w >= 1 && h >= 1) {
> + tex = create_texture(target, intFormat, w, h, numSamples);
> + if (tex) {
> + /* done! */
> + *width = w;
> + *height = h;
> + break;
> + }
> + /* try smaller size */
> + if (h >= w) {
> + h /= 2;
> + }
> + else {
> + w /= 2;
> + }
> + }
> +
> + return tex;
> +}
> +
> +
> +/**
> + * Create an FBO which wraps the given texture.
> + */
> +static GLuint
> +create_fbo(GLuint tex, GLenum texTarget)
> +{
> + GLuint fbo;
> +
> + assert(texTarget == GL_TEXTURE_2D_MULTISAMPLE ||
> + texTarget == GL_TEXTURE_2D_ARRAY ||
> + texTarget == GL_TEXTURE_2D);
> +
> + glGenFramebuffers(1, &fbo);
> + glBindFramebuffer(GL_FRAMEBUFFER, fbo);
> + if (texTarget == GL_TEXTURE_2D_MULTISAMPLE ||
> + texTarget == GL_TEXTURE_2D) {
> + glFramebufferTexture2D(GL_FRAMEBUFFER,
> + GL_COLOR_ATTACHMENT0,
> + texTarget, tex, 0); /* 0=level */
> + }
> + else {
> + assert(texTarget == GL_TEXTURE_2D_ARRAY);
> + glFramebufferTextureLayer(GL_FRAMEBUFFER,
> + GL_COLOR_ATTACHMENT0,
> + tex, 0, 0);
> + }
> +
> + GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
> + if (status != GL_FRAMEBUFFER_COMPLETE) {
> + if (verbose) {
> + printf("Failed to create FBO! (status = %s)\n",
> + piglit_get_gl_enum_name(status));
> + }
> + glDeleteFramebuffers(1, &fbo);
> + fbo = 0;
> + }
> +
> + return fbo;
> +}
> +
> +
> +/**
> + * Load the GL_RGBA32F/16F MSAA (or array) texture with known values.
> + * The color components are basically:
> + * x = texcoord in [0, 1] (this can get fuzzy for large texture widths)
> + * y = fragcoord.y MOD 16 in [0, 15]
> + * z = -curSample in [-(numSamples-1), 0]
> + * w = curSample in [0, numSamples-1]
> + */
> +static void
> +load_texture_image(GLenum target, GLuint fbo, GLuint tex,
> + GLsizei width, GLsizei height, GLuint numSamples,
> + GLfloat valueScale)
> +{
> + static const char *vs_text =
> + "#version 130\n"
> + "out vec4 texcoord;\n"
> + "void main() {\n"
> + " texcoord = gl_MultiTexCoord0;\n"
> + " gl_Position = gl_Vertex;\n"
> + "}\n";
> + static const char *fs_text =
> + "#version 130\n"
> + "out vec4 color;\n"
> + "in vec4 texcoord;\n"
> + "uniform int curSample;\n"
> + "uniform float valueScale;\n"
> + "void main() {\n"
> + " float x = texcoord.x; \n"
> + " float y = float(int(gl_FragCoord.y) % 16) / 16.0; \n"
> + " float z = -curSample; \n"
> + " float w = curSample; \n"
> + " color = valueScale * vec4(x, y, z, w); \n"
> + "}\n";
> +
> + GLuint prog;
> +
> + prog = piglit_build_simple_program(vs_text, fs_text);
> +
> + assert(prog);
> + assert(numSamples <= 32);
> +
> + glUseProgram(prog);
> +
> + GLint curSampleUniform = glGetUniformLocation(prog, "curSample");
> + assert(curSampleUniform >= 0);
> +
> + GLint valueScaleUniform = glGetUniformLocation(prog, "valueScale");
> + glUniform1f(valueScaleUniform, valueScale);
> +
> + if (target == GL_TEXTURE_2D_MULTISAMPLE) {
> + glEnable(GL_SAMPLE_MASK);
> + glEnable(GL_MULTISAMPLE);
> + }
> +
> + GLint samp;
> + for (samp = 0; samp < numSamples; samp++) {
> + if (verbose) {
> + printf("Render sample/layer %d\n", samp);
> + }
> +
> + glUniform1i(curSampleUniform, samp);
> +
> + /* choose sample or layer to write to */
> + if (target == GL_TEXTURE_2D_MULTISAMPLE) {
> + glSampleMaski(0, 1u << samp);
> + }
> + else {
> + assert(target == GL_TEXTURE_2D_ARRAY);
> + glFramebufferTextureLayer(GL_FRAMEBUFFER,
> + GL_COLOR_ATTACHMENT0,
> + tex, 0, samp);
> + }
> +
> + /* Full framebuffer rect */
> + piglit_draw_rect_tex(-1, -1, 2, 2,
> + 0, 0, 1, 1);
> + }
> +
> + if (target == GL_TEXTURE_2D_MULTISAMPLE) {
> + glDisable(GL_SAMPLE_MASK);
> + glDisable(GL_MULTISAMPLE);
> + }
> +
> + glDeleteProgram(prog);
> +}
> +
> +
> +/**
> + * Create simple 2D, GL_RGBA32F texture of given size.
> + */
> +static GLuint
> +create_float4_tex(GLsizei width, GLsizei height)
> +{
> + GLuint tex;
> +
> + glGenTextures(1, &tex);
> + glBindTexture(GL_TEXTURE_2D, tex);
> + glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32F, width, height);
> +
> + if (glGetError() != GL_NO_ERROR) {
> + glDeleteTextures(1, &tex);
> + tex = 0;
> + }
> + return tex;
> +}
> +
> +
> +/**
> + * Create the shader program needed for extracting texels from an
> + * MSAA (or array) texture.
> + */
> +static GLuint
> +create_readback_program(GLenum target)
> +{
> + static const char *fs_text_msaa =
> + "#version 130\n"
> + "#extension GL_ARB_texture_multisample : enable\n"
> + "out vec4 color;\n"
> + "uniform sampler2DMS tex;\n"
> + "uniform int sample;\n"
> + "void main() {\n"
> + " ivec2 coord = ivec2(gl_FragCoord.xy);\n"
> + " color = texelFetch(tex, coord, sample);\n"
> + "}\n";
> +
> + static const char *fs_text_array =
> + "#version 130\n"
> + "out vec4 color;\n"
> + "uniform sampler2DArray tex;\n"
> + "uniform int sample;\n"
> + "void main() {\n"
> + " ivec2 coord = ivec2(gl_FragCoord.xy);\n"
> + " color = texelFetch(tex, ivec3(coord, sample), 0);\n"
> + "}\n";
> +
> + const char *fs_text = target == GL_TEXTURE_2D_MULTISAMPLE ?
> + fs_text_msaa : fs_text_array;
> +
> + GLuint prog = piglit_build_simple_program(NULL, fs_text);
> +
> + assert(prog);
> +
> + return prog;
> +}
> +
> +/**
> + * Extract a slice or per-sample image from the src_tex.
> + */
> +static void
> +extract_texture_image(GLuint readbackProg,
> + GLuint src_tex, GLsizei width, GLsizei height,
> + GLuint sample)
> +{
> + glUseProgram(readbackProg);
> +
> + GLint texUniform = glGetUniformLocation(readbackProg, "tex");
> + GLint sampleUniform = glGetUniformLocation(readbackProg, "sample");
> +
> + /* Create texture to put results into, and wrap it in an FBO.
> + * The shader will extract the sample from the MSAA texture (or
> + * array layer) and write the results into a destination texture/FBO.
> + */
> + GLuint dst_tex = create_float4_tex(width, height);
> + GLuint dst_fbo = create_fbo(dst_tex, GL_TEXTURE_2D);
> +
> + glUniform1i(texUniform, 0); // unit 0
> + glUniform1i(sampleUniform, sample);
> +
> + glBindFramebuffer(GL_FRAMEBUFFER, dst_fbo);
> +
> + piglit_draw_rect_tex(-1, -1, 2, 2,
> + 0, 0, 1, 1);
> +
> + glBindTexture(GL_TEXTURE_2D, dst_tex);
> +
> + /* Now, the extracted image is available both as dst_tex
> + * and as the current FBO.
> + */
> +}
> +
> +
> +/**
> + * Test if two float[4] values are nearly equal.
> + */
> +static bool
> +nearly_equal(const GLfloat x[4], const GLfloat y[4])
> +{
> + /* XXX this tolerance was chosen emperically */
> + const float maxRelDiff = 0.0005;
> + int i;
> + for (i = 0; i < 4; i++) {
> + float diff = x[i] - y[i];
> + float ax = fabsf(x[i]), ay = fabsf(y[i]);
> + if (diff > MAX2(ax, ay) * maxRelDiff) {
> + return false;
> + }
> + }
> +
> + return true;
> +}
> +
> +
> +/**
> + * To record +/- max difference between expected and rendered results.
> + */
> +struct error_info
> +{
> + float min_error[4], max_error[4];
> + float avg_error[4];
> + unsigned num_fail;
> +};
> +
> +
> +static void
> +init_error_info(struct error_info *err)
> +{
> + int i;
> + for (i = 0; i < 4; i++) {
> + err->min_error[i] = 1e20;
> + err->max_error[i] = -1e20;
> + err->avg_error[i] = 0.0;
> + }
> + err->num_fail = 0;
> +}
> +
> +
> +static bool
> +nonzero(const float a[4])
> +{
> + return a[0] != 0.0 ||a[1] != 0.0 ||a[2] != 0.0 ||a[3] != 0.0;
> +}
> +
> +
> +static void
> +finish_and_print_error_info(struct error_info *err,
> + GLsizei width, GLsizei height)
> +{
> + int i;
> + for (i = 0; i < 4; i++) {
> + err->avg_error[i] /= width * height;
> + }
> + if (verbose ||
> + nonzero(err->min_error) ||
> + nonzero(err->max_error) ||
> + nonzero(err->avg_error)) {
> + printf("Min error: %g %g %g %g\n",
> + err->min_error[0], err->min_error[1],
> + err->min_error[2], err->min_error[3]);
> + printf("Max error: %g %g %g %g\n",
> + err->max_error[0], err->max_error[1],
> + err->max_error[2], err->max_error[3]);
> + printf("Avg error: %g %g %g %g\n",
> + err->avg_error[0], err->avg_error[1],
> + err->avg_error[2], err->avg_error[3]);
> + printf("num_fail: %u\n", err->num_fail);
> + }
> +}
> +
> +
> +static void
> +update_error_info(struct error_info *err,
> + const GLfloat a[4], const GLfloat b[4])
> +{
> + bool fail = false;
> + int i;
> +
> + for (i = 0; i < 4; i++) {
> + float delta = a[i] - b[i];
> + err->min_error[i] = MIN2(err->min_error[i], delta);
> + err->max_error[i] = MAX2(err->max_error[i], delta);
> +
> + err->avg_error[i] += fabsf(delta);
> +
> + if (delta != 0.0f) {
> + fail = true;
> + }
> + }
> +
> + err->num_fail += (unsigned) fail;
> +}
> +
> +
> +static unsigned
> +texel_size(GLenum intFormat)
> +{
> + switch (intFormat) {
> + case GL_RGBA16F:
> + return 4 * sizeof(GLhalf);
> + case GL_RGBA32F:
> + return 4 * sizeof(GLfloat);
> + default:
> + assert(!"Unexpected texture format");
> + }
> +}
> +
> +
> +/**
> + * Read back all texture samples, compare to reference.
> + */
> +static bool
> +validate_texture_image(GLenum target,
> + GLenum intFormat,
> + GLuint readbackProg,
> + GLuint src_tex,
> + GLsizei width, GLsizei height, GLuint numSamples,
> + GLfloat valueScale)
> +{
> + /*
> + * Note: this is a little more complicated than just mallocing
> + * a buffer of size width * height * numSamples * texelSize
> + * because we could easily exceed 4GB. So, we read back the image
> + * in stripes no larger than 512MB.
> + */
> + const size_t buffer_size = 512 * 1024 * 1024; // 512 MB
> + GLfloat *buffer = malloc(buffer_size);
> + assert(buffer);
> +
> + const int bytesPerRow = width * numSamples * texel_size(intFormat);
> + const int stripeHeight = MIN2(buffer_size / bytesPerRow, height);
> +
> + bool pass = true;
> + float fwidth = (float) width;
> + GLuint samp;
> +
> + glBindTexture(target, src_tex);
> +
> + for (samp = 0; samp < numSamples; samp++) {
> + struct error_info err;
> +
> + init_error_info(&err);
> +
> + if (verbose) {
> + printf("Checking sample/layer %d\n", samp);
> + }
> +
> + extract_texture_image(readbackProg, src_tex,
> + width, height, samp);
> +
> + GLint i, j, numFail = 0;
> +
> + for (j = 0; j < height; j++) {
> +
> + if (j % stripeHeight == 0) {
> + /* read a stripe */
> + if (height == stripeHeight) {
> + /* get whole texture with GetTexImage */
> + glGetTexImage(GL_TEXTURE_2D, 0,
> + GL_RGBA, GL_FLOAT,
> + buffer);
> + }
> + else {
> + /* use glReadPixels to get a stripe */
> + glReadPixels(0, j, width, stripeHeight,
> + GL_RGBA, GL_FLOAT, buffer);
> + }
> + }
> +
> + for (i = 0; i < width; i++) {
> + int row = j % stripeHeight;
> + const GLfloat *texel =
> + buffer + (width * row + i) * 4;
> + GLfloat expected[4];
> +
> + /* [0] is texcoord at center of fragment */
> + expected[0] = i / fwidth + (0.5f / fwidth);
> + /* [1] is fragcoord.y MOD 16 / 16.0 */
> + expected[1] = (j % 16) / 16.0;
> + expected[2] = -1.0 * samp;
> + expected[3] = samp;
> +
> + expected[0] *= valueScale;
> + expected[1] *= valueScale;
> + expected[2] *= valueScale;
> + expected[3] *= valueScale;
> +
> + update_error_info(&err, texel, expected);
> +
> + if (!nearly_equal(texel, expected)) {
> + printf("Fail at %d, %d:\n", i, j);
> + printf(" Expected %g, %g, %g, %g\n",
> + expected[0], expected[1],
> + expected[2], expected[3]);
> + printf(" Found %g, %g, %g, %g\n",
> + texel[0], texel[1],
> + texel[2], texel[3]);
> + pass = false;
> + numFail++;
> + if (numFail >= 5) {
> + goto end;
> + }
> + }
> + }
> + }
> + finish_and_print_error_info(&err, width, height);
> + }
> +
> +end:
> + free(buffer);
> +
> + return pass;
> +}
> +
> +
> +void
> +piglit_init(int argc, char **argv)
> +{
> + GLenum target = GL_TEXTURE_2D_MULTISAMPLE;
> + GLenum intFormat = GL_RGBA32F;
> + GLint samples = -1; /* or array slices */
> + GLint maxSize = -1;
> + GLsizei width = -1, height = -1;
> + GLfloat valueScale = 1.0;
> + int i;
> +
> + for (i = 1; i < argc; i++) {
> + if (strcmp(argv[i], "--array") == 0) {
> + target = GL_TEXTURE_2D_ARRAY;
> + }
> + else if (strcmp(argv[i], "--samples") == 0) {
> + i++;
> + samples = atoi(argv[i]);
> + assert(samples > 0);
> + }
> + else if (strcmp(argv[i], "--texsize") == 0) {
> + i++;
> + maxSize = atoi(argv[i]);
> + assert(maxSize > 0);
> + }
> + else if (strcmp(argv[i], "--width") == 0) {
> + i++;
> + width = atoi(argv[i]);
> + assert(width > 0);
> + }
> + else if (strcmp(argv[i], "--height") == 0) {
> + i++;
> + height = atoi(argv[i]);
> + assert(height > 0);
> + }
> + else if (strcmp(argv[i], "--scale") == 0) {
> + i++;
> + valueScale = atof(argv[i]);
> + assert(valueScale > 0.0);
> + }
> + else if (strcmp(argv[i], "--fp16") == 0) {
> + intFormat = GL_RGBA16F;
> + }
> + else if (strcmp(argv[i], "--verbose") == 0) {
> + verbose = true;
> + }
> + else {
> + printf("Unknown option %s\n", argv[i]);
> + piglit_report_result(PIGLIT_FAIL);
> + }
> + }
> +
> + piglit_require_extension("GL_ARB_texture_float");
> + piglit_require_extension("GL_ARB_texture_multisample");
> + piglit_require_GLSL_version(130);
> +
> + if (maxSize == -1) {
> + glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxSize);
> + }
> +
> + if (samples == -1) {
> + if (target == GL_TEXTURE_2D_MULTISAMPLE) {
> + glGetIntegerv(GL_MAX_COLOR_TEXTURE_SAMPLES, &samples);
> + }
> + else {
> + samples = 16; /* 16 texture array layers */
> + }
> + }
> +
> + GLuint tex, fbo = 0;
> +
> + if (width == -1 || height == -1) {
> + width = height = maxSize;
> + }
> +
> + while (width > 1 && height > 1) {
> + tex = create_texture_max_size(target, intFormat,
> + &width, &height, samples);
> +
> + if (!tex) {
> + printf("Failed to create MSAA texture\n");
> + piglit_report_result(PIGLIT_FAIL);
> + }
> +
> + fbo = create_fbo(tex, target);
> + if (!fbo) {
> + /* texture creation worked, but FBO failed.
> + * Try smaller texture.
> + */
> + glDeleteTextures(1, &tex);
> + if (height >= width) {
> + height /= 2;
> + }
> + else {
> + width /= 2;
> + }
> + }
> + else {
> + break;
> + }
> + }
> +
> + if (!fbo) {
> + printf("Failed to create FBO\n");
> + piglit_report_result(PIGLIT_SKIP);
> + }
> +
> + GLint64 mbytes = (GLint64) width * height * samples
> + * texel_size(intFormat) / (1024 * 1024);
> +
> + const char *formatName = piglit_get_gl_enum_name(intFormat);
> + if (target == GL_TEXTURE_2D_ARRAY) {
> + printf("Created %d x %d %d-layer %s texture/FBO"
> + " (%lld MB)\n",
> + width, height, samples, formatName,
> + (long long int) mbytes);
> + }
> + else {
> + printf("Created %d x %d %d-sample MSAA %s texture/FBO"
> + " (%lld MB)\n",
> + width, height, samples, formatName,
> + (long long int) mbytes);
> + }
> +
> + GLuint readbackProg = create_readback_program(target);
> +
> + glViewport(0, 0, width, height);
> + glClampColor(GL_CLAMP_READ_COLOR, GL_FALSE);
> + glClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
> +
> + if (verbose) {
> + printf("Loading...\n");
> + }
> +
> + load_texture_image(target, fbo, tex, width, height,
> + samples, valueScale);
> +
> + if (verbose) {
> + printf("Validating...\n");
> + }
> +
> + bool pass = validate_texture_image(target, intFormat, readbackProg, tex,
> + width, height, samples, valueScale);
> +
> + if (!piglit_check_gl_error(GL_NO_ERROR)) {
> + pass = false;
> + }
> +
> + piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
> +}
> +
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> + /* should never get here */
> + return PIGLIT_FAIL;
> +}
>
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