[Piglit] [PATCH 6/6] arb_gpu_shader5: add tests for interpolateAtCentroid with qualified varying

Ilia Mirkin imirkin at alum.mit.edu
Sun Dec 7 17:15:24 PST 2014


Series is Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>. As we
discussed, it'd be nice to test other sample id's and other offsets,
perhaps dynamically, but at least statically.

On Sat, Dec 6, 2014 at 9:04 PM, Chris Forbes <chrisf at ijw.co.nz> wrote:
> Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
> ---
>  tests/all.py                                       |   3 +
>  tests/spec/arb_gpu_shader5/CMakeLists.gl.txt       |   3 +
>  .../interpolateAtCentroid-centroid.c               | 161 ++++++++++++++++++++
>  .../arb_gpu_shader5/interpolateAtCentroid-flat.c   | 163 ++++++++++++++++++++
>  .../interpolateAtCentroid-noperspective.c          | 169 +++++++++++++++++++++
>  5 files changed, 499 insertions(+)
>  create mode 100644 tests/spec/arb_gpu_shader5/interpolateAtCentroid-centroid.c
>  create mode 100644 tests/spec/arb_gpu_shader5/interpolateAtCentroid-flat.c
>  create mode 100644 tests/spec/arb_gpu_shader5/interpolateAtCentroid-noperspective.c
>
> diff --git a/tests/all.py b/tests/all.py
> index 2b695c0..cfbe529 100644
> --- a/tests/all.py
> +++ b/tests/all.py
> @@ -1939,6 +1939,9 @@ add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-xfb-streams-without-invoca
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-emitstreamvertex_nodraw')
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid')
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid-packing')
> +add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid-flat')
> +add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid-centroid')
> +add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid-noperspective')
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtSample')
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtSample-nonconst')
>  add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtOffset')
> diff --git a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
> index 99027ad..b25c0d4 100644
> --- a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
> +++ b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
> @@ -12,6 +12,9 @@ link_libraries (
>  piglit_add_executable (arb_gpu_shader5-minmax minmax.c)
>  piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid interpolateAtCentroid.c)
>  piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid-packing interpolateAtCentroid-packing.c)
> +piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid-flat interpolateAtCentroid-flat.c)
> +piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid-centroid interpolateAtCentroid-centroid.c)
> +piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid-noperspective interpolateAtCentroid-noperspective.c)
>  piglit_add_executable (arb_gpu_shader5-interpolateAtSample interpolateAtSample.c)
>  piglit_add_executable (arb_gpu_shader5-interpolateAtSample-nonconst interpolateAtSample-nonconst.c)
>  piglit_add_executable (arb_gpu_shader5-interpolateAtOffset interpolateAtOffset.c)
> diff --git a/tests/spec/arb_gpu_shader5/interpolateAtCentroid-centroid.c b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-centroid.c
> new file mode 100644
> index 0000000..e4889b2
> --- /dev/null
> +++ b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-centroid.c
> @@ -0,0 +1,161 @@
> +/*
> + * Copyright (c) 2013 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 interpolateAtCentroid-centroid.c
> + *
> + * Test ARB_gpu_shader5 interpolateAtCentroid builtin interaction with centroid varyings
> + *
> + * Tests that interpolateAtCentroid(x) == x, if x is declared centroid.
> + *
> + * R, 1-G channels are interesting; a correct implementation should produce
> + * (0,1,0) in all pixels.
> + *
> + * We require 3.2, so the following assumptions are made:
> + * - MAX_SAMPLES >= 4 (although we dont require exactly 4 samples; if only an
> + *   8x mode is supported, the test should still work)
> + * - GLSL 1.50 and Multisample textures are supported.
> + */
> +
> +
> +#include "piglit-util-gl.h"
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> +       config.supports_gl_core_version = 32;
> +
> +       config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +GLuint ms_fbo, vao, bo;
> +GLint draw_prog, test_prog;
> +
> +float green[] = { 0, 1, 0 };
> +float verts[][2] = { { -1, -1 }, { 1, -1 }, { -1, 1 }, { 1, 1 }, };
> +#define GAIN "5"                       /* multiplier for absolute difference; make the error more visible. */
> +
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> +       bool pass = true;
> +       glViewport(0, 0, 64, 64);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glUseProgram(draw_prog);
> +       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
> +       glUseProgram(test_prog);
> +       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
> +
> +       pass = piglit_probe_rect_rgb(0, 0, 64, 64, green) && pass;
> +
> +       piglit_present_results();
> +
> +       return pass ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> +
> +
> +void
> +piglit_init(int argc, char**argv)
> +{
> +       GLuint tex;
> +       piglit_require_extension("GL_ARB_gpu_shader5");
> +
> +       glGenFramebuffers(1, &ms_fbo);
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glGenTextures(1, &tex);
> +       glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
> +       glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 4,
> +                               GL_RGBA, 64, 64, GL_TRUE);
> +       glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
> +                              GL_TEXTURE_2D_MULTISAMPLE, tex, 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("fbo setup failed.\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       draw_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec2 p;\n"
> +               "centroid out vec2 test;\n"
> +               "void main() {\n"
> +               "       gl_Position = vec4(p, 0, 1);\n"
> +               "       test = p;\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "#extension GL_ARB_gpu_shader5: require\n"
> +               "centroid in vec2 test;\n"
> +               "void main() {\n"
> +               "       gl_FragColor = vec4(" GAIN " * abs(\n"
> +               "               interpolateAtCentroid(test) - test), 0, 1);\n"
> +               "}\n");
> +       if (!draw_prog) {
> +               printf("draw_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       test_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec2 p;\n"
> +               "void main() {\n"
> +               "       gl_Position = vec4(p, 0, 1);\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "uniform sampler2DMS s;\n"
> +               "void main() {\n"
> +               "       vec4 temp = \n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 0) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 1) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 2) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 3);\n"
> +               "       gl_FragColor = vec4(temp.x, 1-temp.y, temp.z, temp.w);\n"
> +               "}\n");
> +       if (!test_prog) {
> +               printf("test_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       glUseProgram(test_prog);
> +       glUniform1i(glGetUniformLocation(test_prog, "s"), 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("shader setup failed\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       glGenVertexArrays(1, &vao);
> +       glBindVertexArray(vao);
> +
> +       glEnableVertexAttribArray(0);
> +       glGenBuffers(1, &bo);
> +       glBindBuffer(GL_ARRAY_BUFFER, bo);
> +       glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
> +       glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, (GLvoid const *)0);
> +}
> +
> diff --git a/tests/spec/arb_gpu_shader5/interpolateAtCentroid-flat.c b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-flat.c
> new file mode 100644
> index 0000000..0496779
> --- /dev/null
> +++ b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-flat.c
> @@ -0,0 +1,163 @@
> +/*
> + * Copyright (c) 2013 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 interpolateAtCentroid-flat.c
> + *
> + * Test ARB_gpu_shader5 interpolateAtCentroid builtin interaction with flat varyings
> + *
> + * Tests that interpolateAtCentroid(x) == x, if x is declared flat. This is the behavior
> + * described in the GL4.3+ spec, and we interpret it to be a correction.
> + *
> + * R, 1-G channels are interesting; a correct implementation should produce
> + * (0,1,0) in all pixels.
> + *
> + * We require 3.2, so the following assumptions are made:
> + * - MAX_SAMPLES >= 4 (although we dont require exactly 4 samples; if only an
> + *   8x mode is supported, the test should still work)
> + * - GLSL 1.50 and Multisample textures are supported.
> + */
> +
> +
> +#include "piglit-util-gl.h"
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> +       config.supports_gl_core_version = 32;
> +
> +       config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +GLuint ms_fbo, vao, bo;
> +GLint draw_prog, test_prog;
> +
> +float green[] = { 0, 1, 0 };
> +float verts[][2] = { { -1, -1 }, { 1, -1 }, { -1, 1 }, { 1, 1 }, };
> +#define GAIN "5"                       /* multiplier for absolute difference; make the error more visible. */
> +
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> +       bool pass = true;
> +       glViewport(0, 0, 64, 64);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glUseProgram(draw_prog);
> +       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
> +       glUseProgram(test_prog);
> +       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
> +
> +       pass = piglit_probe_rect_rgb(0, 0, 64, 64, green) && pass;
> +
> +       piglit_present_results();
> +
> +       return pass ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> +
> +
> +void
> +piglit_init(int argc, char**argv)
> +{
> +       GLuint tex;
> +       piglit_require_extension("GL_ARB_gpu_shader5");
> +
> +       glGenFramebuffers(1, &ms_fbo);
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glGenTextures(1, &tex);
> +       glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
> +       glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 4,
> +                               GL_RGBA, 64, 64, GL_TRUE);
> +       glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
> +                              GL_TEXTURE_2D_MULTISAMPLE, tex, 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("fbo setup failed.\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       draw_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec2 p;\n"
> +               "flat out vec2 unqualified;\n"
> +               "centroid out vec2 centroid_qualified;\n"
> +               "void main() {\n"
> +               "       gl_Position = vec4(p, 0, 1);\n"
> +               "       unqualified = p;\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "#extension GL_ARB_gpu_shader5: require\n"
> +               "flat in vec2 unqualified;\n"
> +               "void main() {\n"
> +               "       gl_FragColor = vec4(" GAIN " * abs(\n"
> +               "               interpolateAtCentroid(unqualified) - unqualified), 0, 1);\n"
> +               "}\n");
> +       if (!draw_prog) {
> +               printf("draw_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       test_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec2 p;\n"
> +               "void main() {\n"
> +               "       gl_Position = vec4(p, 0, 1);\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "uniform sampler2DMS s;\n"
> +               "void main() {\n"
> +               "       vec4 temp = \n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 0) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 1) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 2) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 3);\n"
> +               "       gl_FragColor = vec4(temp.x, 1-temp.y, temp.z, temp.w);\n"
> +               "}\n");
> +       if (!test_prog) {
> +               printf("test_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       glUseProgram(test_prog);
> +       glUniform1i(glGetUniformLocation(test_prog, "s"), 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("shader setup failed\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       glGenVertexArrays(1, &vao);
> +       glBindVertexArray(vao);
> +
> +       glEnableVertexAttribArray(0);
> +       glGenBuffers(1, &bo);
> +       glBindBuffer(GL_ARRAY_BUFFER, bo);
> +       glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
> +       glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, (GLvoid const *)0);
> +}
> +
> diff --git a/tests/spec/arb_gpu_shader5/interpolateAtCentroid-noperspective.c b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-noperspective.c
> new file mode 100644
> index 0000000..0aa8471
> --- /dev/null
> +++ b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-noperspective.c
> @@ -0,0 +1,169 @@
> +/*
> + * Copyright (c) 2013 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 interpolate-at-centroid.c
> + *
> + * Test ARB_gpu_shader5 interpolateAtCentroid builtin
> + *
> + * Tests that interpolateAtCentroid(x) gives the same result as
> + * declaring x as `centroid in`.
> + *
> + * R, 1-G channels are interesting; a correct implementation should produce
> + * (0,1,0) in all pixels.
> + *
> + * We require 3.2, so the following assumptions are made:
> + * - MAX_SAMPLES >= 4 (although we dont require exactly 4 samples; if only an
> + *   8x mode is supported, the test should still work)
> + * - GLSL 1.50 and Multisample textures are supported.
> + */
> +
> +
> +#include "piglit-util-gl.h"
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> +       config.supports_gl_core_version = 32;
> +
> +       config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +GLuint ms_fbo, vao, bo;
> +GLint draw_prog, test_prog;
> +
> +float green[] = { 0, 1, 0 };
> +float verts[][4] = {
> +       { -2, -2, 2, 2 },
> +       { -2, 2, 2, 2 },
> +       { 1, -1, 0, 1 },
> +       { 1, 1, 0, 1 }, };
> +#define GAIN "5"                       /* multiplier for absolute difference; make the error more visible. */
> +
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> +       bool pass = true;
> +       glViewport(0, 0, 64, 64);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glUseProgram(draw_prog);
> +       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
> +
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
> +       glUseProgram(test_prog);
> +       piglit_draw_rect(-1, -1, 2, 2);
> +
> +       pass = piglit_probe_rect_rgb(0, 0, 64, 64, green) && pass;
> +
> +       piglit_present_results();
> +
> +       return pass ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> +
> +
> +void
> +piglit_init(int argc, char**argv)
> +{
> +       GLuint tex;
> +       piglit_require_extension("GL_ARB_gpu_shader5");
> +
> +       glGenFramebuffers(1, &ms_fbo);
> +       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
> +       glGenTextures(1, &tex);
> +       glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
> +       glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 4,
> +                               GL_RGBA, 64, 64, GL_TRUE);
> +       glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
> +                              GL_TEXTURE_2D_MULTISAMPLE, tex, 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("fbo setup failed.\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       draw_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec4 p;\n"
> +               "noperspective out vec2 unqualified;\n"
> +               "noperspective centroid out vec2 centroid_qualified;\n"
> +               "void main() {\n"
> +               "       gl_Position = p;\n"
> +               "       unqualified = p.xy;\n"
> +               "       centroid_qualified = p.xy;\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "#extension GL_ARB_gpu_shader5: require\n"
> +               "noperspective in vec2 unqualified;\n"
> +               "noperspective centroid in vec2 centroid_qualified;\n"
> +               "void main() {\n"
> +               "       gl_FragColor = vec4(" GAIN " * abs(\n"
> +               "               interpolateAtCentroid(unqualified) - centroid_qualified), 0, 1);\n"
> +               "}\n");
> +       if (!draw_prog) {
> +               printf("draw_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       test_prog = piglit_build_simple_program(
> +               "#version 150\n"
> +               "in vec4 piglit_vertex;\n"
> +               "void main() {\n"
> +               "       gl_Position = piglit_vertex;\n"
> +               "}\n",
> +
> +               "#version 150\n"
> +               "uniform sampler2DMS s;\n"
> +               "void main() {\n"
> +               "       vec4 temp = \n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 0) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 1) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 2) +\n"
> +               "               texelFetch(s, ivec2(gl_FragCoord.xy), 3);\n"
> +               "       gl_FragColor = vec4(temp.x, 1-temp.y, temp.z, temp.w);\n"
> +               "}\n");
> +       if (!test_prog) {
> +               printf("test_prog compile/link failed\n");
> +               piglit_report_result(PIGLIT_FAIL);
> +       }
> +
> +       glUseProgram(test_prog);
> +       glUniform1i(glGetUniformLocation(test_prog, "s"), 0);
> +
> +       if (!piglit_check_gl_error(GL_NO_ERROR)) {
> +               printf("shader setup failed\n");
> +               piglit_report_result(PIGLIT_SKIP);
> +       }
> +
> +       glGenVertexArrays(1, &vao);
> +       glBindVertexArray(vao);
> +
> +       glEnableVertexAttribArray(0);
> +       glGenBuffers(1, &bo);
> +       glBindBuffer(GL_ARRAY_BUFFER, bo);
> +       glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
> +       glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, (GLvoid const *)0);
> +}
> +
> --
> 2.1.3
>
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