This is interesting for mesa's varying packer, and i965's backend. The API does not allow a swizzle to be supplied here, but the backend must cope with one being introduced by packing.
Signed-off-by: Chris Forbes <[email protected]> --- tests/all.py | 1 + tests/spec/arb_gpu_shader5/CMakeLists.gl.txt | 1 + .../interpolateAtCentroid-packing.c | 171 +++++++++++++++++++++ 3 files changed, 173 insertions(+) create mode 100644 tests/spec/arb_gpu_shader5/interpolateAtCentroid-packing.c diff --git a/tests/all.py b/tests/all.py index 3ca843d..07e64fa 100644 --- a/tests/all.py +++ b/tests/all.py @@ -1938,6 +1938,7 @@ add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-tf-wrong-stream-value') add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-xfb-streams-without-invocations') 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') arb_shader_subroutine = {} spec['ARB_shader_subroutine'] = arb_shader_subroutine diff --git a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt index f904a2a..a0058bb 100644 --- a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt +++ b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt @@ -11,3 +11,4 @@ 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) diff --git a/tests/spec/arb_gpu_shader5/interpolateAtCentroid-packing.c b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-packing.c new file mode 100644 index 0000000..ed0f254 --- /dev/null +++ b/tests/spec/arb_gpu_shader5/interpolateAtCentroid-packing.c @@ -0,0 +1,171 @@ +/* + * 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 interaction with varying packing. + * + * 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. + * + * This variant sets up the varyings so that `unqualified` will land in the second half + * of a packed vec4 with the i965 driver, which exercises a tricky case. + */ + + +#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" + "out vec2 pad;\n" + "out vec2 unqualified;\n" + "centroid out vec2 centroid_qualified;\n" + "void main() {\n" + " gl_Position = vec4(p, 0, 1);\n" + " unqualified = p;\n" + " pad = vec2(0);\n" + " centroid_qualified = p;\n" + "}\n", + + "#version 150\n" + "#extension GL_ARB_gpu_shader5: require\n" + "in vec2 pad;\n" /* padding to exercise varying-packing interaction */ + "in vec2 unqualified;\n" + "centroid in vec2 centroid_qualified;\n" + "void main() {\n" + " gl_FragColor = vec4(" GAIN " * abs(\n" + " interpolateAtCentroid(unqualified) - centroid_qualified + pad), 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); +} + -- 2.1.3 _______________________________________________ Piglit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/piglit
