This test exercises alpha test with multiple render targets. This is one part of FDO #67864.
Signed-off-by: Chris Forbes <[email protected]> --- tests/all.tests | 1 + tests/fbo/CMakeLists.gl.txt | 1 + tests/fbo/fbo-mrt-alphatest.c | 153 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 155 insertions(+) create mode 100644 tests/fbo/fbo-mrt-alphatest.c diff --git a/tests/all.tests b/tests/all.tests index 2030e3e..128de58 100644 --- a/tests/all.tests +++ b/tests/all.tests @@ -2350,6 +2350,7 @@ arb_vertex_type_2_10_10_10_rev['attribs'] = concurrent_test('attribs GL_ARB_vert arb_draw_buffers = Group() spec['ARB_draw_buffers'] = arb_draw_buffers add_plain_test(arb_draw_buffers, 'arb_draw_buffers-state_change') +add_plain_test(arb_draw_buffers, 'fbo-mrt-alphatest') ext_draw_buffers2 = Group() spec['EXT_draw_buffers2'] = ext_draw_buffers2 diff --git a/tests/fbo/CMakeLists.gl.txt b/tests/fbo/CMakeLists.gl.txt index 706e63f..588fe26 100644 --- a/tests/fbo/CMakeLists.gl.txt +++ b/tests/fbo/CMakeLists.gl.txt @@ -73,6 +73,7 @@ piglit_add_executable (fbo-incomplete-texture-04 fbo-incomplete-texture-04.c) piglit_add_executable (fbo-integer fbo-integer.c) piglit_add_executable (fbo-maxsize fbo-maxsize.c) piglit_add_executable (fbo-mipmap-copypix fbo-mipmap-copypix.c) +piglit_add_executable (fbo-mrt-alphatest fbo-mrt-alphatest.c) piglit_add_executable (fbo-nodepth-test fbo-nodepth-test.c) piglit_add_executable (fbo-nostencil-test fbo-nostencil-test.c) piglit_add_executable (fbo-readpixels fbo-readpixels.c) diff --git a/tests/fbo/fbo-mrt-alphatest.c b/tests/fbo/fbo-mrt-alphatest.c new file mode 100644 index 0000000..78a4f7d --- /dev/null +++ b/tests/fbo/fbo-mrt-alphatest.c @@ -0,0 +1,153 @@ +/* + * Copyright © 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. + * + * Authors: + * Chris Forbes <[email protected]> + * + */ + +/* + * fbo-mrt-alphatest asserts correct behavior for alpha-testing of fragments + * when multiple color buffers are being rendered to. In particular, the alpha + * component of the first color output is used for the alpha test. + * + * This is important for deferred renderers which use alpha-test, and is a + * significant edge case for the i965 driver. + */ + +#include "piglit-util-gl-common.h" + +PIGLIT_GL_TEST_CONFIG_BEGIN + + config.supports_gl_compat_version = 21; + + config.window_width = 128; + config.window_height = 64; + config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE; + +PIGLIT_GL_TEST_CONFIG_END + +GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 }; +GLuint fbo; +GLint prog; +GLuint color0, color1; + +void +piglit_init(int argc, char **argv) +{ + piglit_require_GLSL_version(130); + + glGenFramebuffers(1, &fbo); + glBindFramebuffer(GL_FRAMEBUFFER, fbo); + + glGenTextures(1, &color0); + glBindTexture(GL_TEXTURE_2D, color0); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color0, 0); + + glGenTextures(1, &color1); + glBindTexture(GL_TEXTURE_2D, color1); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, color1, 0); + + glDrawBuffers(2, buffers); + + prog = piglit_build_simple_program( + "#version 130\n" + "in vec4 pos;\n" + "void main() {\n" + " gl_Position = pos;\n" + "}\n", + + "#version 130\n" + "void main() {\n" + " float alpha = float(int(gl_FragCoord.x / 16 + gl_FragCoord.y / 16) % 2);\n" + " gl_FragData[0] = vec4(1.0, 0.0, 0.0, alpha);\n" + " gl_FragData[1] = vec4(0.0, 1.0, 0.0, 1.0);\n" + "}\n" + ); + + if (!piglit_check_gl_error(GL_NO_ERROR)) { + printf("Setup for test failed.\n"); + piglit_report_result(PIGLIT_SKIP); + } + + if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) { + printf("Framebuffer not complete.\n"); + piglit_report_result(PIGLIT_SKIP); + } +} + + +enum piglit_result +piglit_display(void) +{ + glBindFramebuffer(GL_FRAMEBUFFER, fbo); + glClearColor(0,0,1,0); + glClear(GL_COLOR_BUFFER_BIT); + + glAlphaFunc(GL_GEQUAL, 0.5f); + glEnable(GL_ALPHA_TEST); + + glUseProgram(prog); + glViewport(0, 0, 64, 64); + piglit_draw_rect(-1, -1, 2, 2); + + glDisable(GL_ALPHA_TEST); + + /* visualize it */ + glUseProgram(0); + glBindFramebuffer(GL_FRAMEBUFFER, 0); + glViewport(0, 0, 128, 64); + glClearColor(0,0,0.5,0); + glClear(GL_COLOR_BUFFER_BIT); + + glEnable(GL_TEXTURE_2D); + + glBindTexture(GL_TEXTURE_2D, color0); + piglit_draw_rect_tex(-1, -1, 1, 2, + 0, 0, 1, 1); + glBindTexture(GL_TEXTURE_2D, color1); + piglit_draw_rect_tex(0, -1, 1, 2, + 0, 0, 1, 1); + + glDisable(GL_TEXTURE_2D); + + { + bool pass = true; + float red[] = {1,0,0}; + float green[] = {0,1,0}; + float blue[] = {0,0,1}; + pass = piglit_probe_pixel_rgb(4, 4, blue) && pass; + pass = piglit_probe_pixel_rgb(12, 4, red) && pass; + pass = piglit_probe_pixel_rgb(64 + 4, 4, blue) && pass; + pass = piglit_probe_pixel_rgb(64 + 12, 4, green) && pass; + + piglit_present_results(); + + return pass ? PIGLIT_PASS : PIGLIT_FAIL; + } +} -- 1.8.3.4 _______________________________________________ Piglit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/piglit
