Checks that gl_FragCoord colors the correct area when the framebuffer is flipped. --- tests/opengl.py | 1 + .../CMakeLists.gles2.txt | 1 + .../spec/mesa_framebuffer_flip_y/fragcoord.c | 184 ++++++++++++++++++ 3 files changed, 186 insertions(+) create mode 100644 tests/spec/mesa_framebuffer_flip_y/fragcoord.c
diff --git a/tests/opengl.py b/tests/opengl.py index 6cfa56e01..52a355ff9 100644 --- a/tests/opengl.py +++ b/tests/opengl.py @@ -4950,6 +4950,7 @@ with profile.test_list.group_manager( with profile.test_list.group_manager( PiglitGLTest, grouptools.join('spec', 'mesa_framebuffer_flip_y')) as g: + g(['mesa_framebuffer_flip_y-fragcoord']) g(['mesa_framebuffer_flip_y-params']) g(['mesa_framebuffer_flip_y-scissor']) diff --git a/tests/spec/mesa_framebuffer_flip_y/CMakeLists.gles2.txt b/tests/spec/mesa_framebuffer_flip_y/CMakeLists.gles2.txt index f8a758fba..a2387f028 100644 --- a/tests/spec/mesa_framebuffer_flip_y/CMakeLists.gles2.txt +++ b/tests/spec/mesa_framebuffer_flip_y/CMakeLists.gles2.txt @@ -2,6 +2,7 @@ link_libraries ( piglitutil_${piglit_target_api} ) +piglit_add_executable (mesa_framebuffer_flip_y-fragcoord fragcoord.c) piglit_add_executable (mesa_framebuffer_flip_y-params params.c) if(PIGLIT_BUILD_DMA_BUF_TESTS) diff --git a/tests/spec/mesa_framebuffer_flip_y/fragcoord.c b/tests/spec/mesa_framebuffer_flip_y/fragcoord.c new file mode 100644 index 000000000..d405dab2c --- /dev/null +++ b/tests/spec/mesa_framebuffer_flip_y/fragcoord.c @@ -0,0 +1,184 @@ +/* + * Copyright © 2018 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 fragcoord.c + * + * https://www.khronos.org/registry/OpenGL/extensions/MESA/MESA_framebuffer_flip_y.txt + * + * Checks that gl_FragCoord works correctly on a flipped fbo. This is done + * by creating a shader that colors the top half of a rectangle green and the + * bottom half red. + */ +#include "piglit-util-gl.h" + +PIGLIT_GL_TEST_CONFIG_BEGIN + + config.supports_gl_es_version = 30; + config.khr_no_error_support = PIGLIT_HAS_ERRORS; + +PIGLIT_GL_TEST_CONFIG_END + +static const float red[4] = {1.0, 0.0, 0.0, 1.0}; +static const float green[4] = {0.0, 1.0, 0.0, 1.0}; +static const int tex_width = 16; +static const int tex_height = 8; +static GLuint prog; + +static const char vs_text[] = + "#version 300 es\n" + "layout(location=0) in vec2 a_position;\n" + "void main() { \n" + " gl_Position = vec4(a_position.xy, 0, 1);\n" + "}\n"; + +static const char *fs_text = + "#version 300 es\n" + "precision highp float;\n" + "out highp vec4 f_color;\n" + "uniform float window_height;\n" + "uniform vec4 green;\n" + "uniform vec4 red;\n" + "void main() \n" + "{ \n" + " if (gl_FragCoord.y > (window_height / 2.0)) { \n" + " f_color = green; \n" + " } else { \n" + " f_color = red; \n" + " } \n" + "} \n"; + +static GLuint setup_shaders() +{ + GLuint vs, fs, prog; + + vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text); + fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text); + prog = piglit_link_simple_program(vs, fs); + + glDeleteShader(vs); + glDeleteShader(fs); + + return prog; +} + +enum piglit_result +piglit_display(void) +{ + return PIGLIT_FAIL; +} + +void piglit_init(int argc, char **argv) +{ + GLuint fbo_normal, fbo_flip, tex; + bool pass = true; + int uniform_window_height, uniform_green, uniform_red; + + piglit_require_extension("GL_MESA_framebuffer_flip_y"); + + piglit_require_vertex_shader(); + piglit_require_fragment_shader(); + + prog = setup_shaders(); + + /* Create flipped fbo */ + glGenFramebuffers(1, &fbo_flip); + glBindFramebuffer(GL_FRAMEBUFFER, fbo_flip); + glFramebufferParameteri(GL_FRAMEBUFFER, GL_FRAMEBUFFER_FLIP_Y_MESA, 1); + + glGenTextures(1, &tex); + glBindTexture(GL_TEXTURE_2D, tex); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, + tex_width, tex_height, + 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, + GL_TEXTURE_2D, tex, 0); + + glViewport(0, 0, tex_width, tex_height); + + /* clear to black */ + glClearColor(0.0, 0.0, 0.0, 1.0); + glClear(GL_COLOR_BUFFER_BIT); + + uniform_window_height = glGetUniformLocation(prog,"window_height"); + uniform_green = glGetUniformLocation(prog,"green"); + uniform_red = glGetUniformLocation(prog,"red"); + + glUseProgram(prog); + glUniform1f(uniform_window_height, tex_height); + glUniform4fv(uniform_green, 1, green); + glUniform4fv(uniform_red, 1, red); + piglit_draw_rect(-1, -1, 2, 2); + glUseProgram(0); + + /* Check that reading back the through the framebuffer + * that the flipped orientation is not shown */ + /* Check top half is green */ + pass &= piglit_probe_rect_rgb(0, 0, tex_width, tex_height / 2, green); + + /* Check bottom half is red */ + pass &= piglit_probe_rect_rgb(0, tex_height / 2, + tex_width, tex_height / 2, + red); + + piglit_report_subtest_result(pass ? PIGLIT_PASS : PIGLIT_FAIL, + "fbo access"); + + /* Create another fbo, this time not flipped */ + glGenFramebuffers(1, &fbo_normal); + glBindFramebuffer(GL_FRAMEBUFFER, fbo_normal); + + /* Bind the previously created texture to it */ + glBindTexture(GL_TEXTURE_2D, tex); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, + tex_width, tex_height, + 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, + GL_TEXTURE_2D, tex, 0); + + /* Now when reading back from the fbo the texture should + * be flipped */ + /* Check top half is red */ + pass &= piglit_probe_rect_rgb(0, 0, tex_width, tex_height / 2, red); + + /* Check bottom half is green */ + pass &= piglit_probe_rect_rgb(0, tex_height / 2, + tex_width, tex_height / 2, + green); + + piglit_report_subtest_result(pass ? PIGLIT_PASS : PIGLIT_FAIL, + "flipped fbo"); + + glUseProgram(0); + glDeleteProgram(prog); + glDeleteTextures(1, &tex); + glDeleteFramebuffers(1, &fbo_normal); + glDeleteFramebuffers(1, &fbo_flip); + + if (!piglit_check_gl_error(GL_NO_ERROR)) + pass = false; + + piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL); +} -- 2.19.0.397.gdd90340f6a-goog _______________________________________________ Piglit mailing list Piglit@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/piglit