<div dir="ltr">On 5 August 2013 15:32, Anuj Phogat <<a href="mailto:anuj.phogat@gmail.com" target="_blank">anuj.phogat@gmail.com</a>> wrote: <div class="gmail_extra"><div class="gmail_quote"> <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">This test verifies the accuracy of scaled blitting from a single sample buffer with GL_LINEAR filtering. It compares the output from following rendering scenarios: 1. Scaled blit using a single sample framebuffer with texture / renderbuffer attachment. 2. Scaled blit using a glsl shader program. Signed-off-by: Anuj Phogat <<a href="mailto:anuj.phogat@gmail.com">anuj.phogat@gmail.com</a>> --- tests/all.tests | 1 + .../ext_framebuffer_multisample/CMakeLists.gl.txt | 1 + .../blit-scaled-linear.cpp | 297 +++++++++++++++++++++ 3 files changed, 299 insertions(+) create mode 100644 tests/spec/ext_framebuffer_multisample/blit-scaled-linear.cpp </blockquote><div> </div><div>I see that you've placed this test in ext_framebuffer_multisample because it re-uses the test pattern defined in ext_framebuffer_multisample/common.cpp. I'm not comfortable with that--if we start mixing and matching our directory organization like this, it's going to start getting hard to find the files we're looking for. How about if we do a pre-patch that moves the test pattern to a global location (i.e. somewhere in tests/util)? Then this test can go in arb_framebuffer_multisample where it belongs. </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> diff --git a/tests/all.tests b/tests/all.tests index 39ee624..07961b5 100644 --- a/tests/all.tests +++ b/tests/all.tests @@ -1100,6 +1100,7 @@ for format in ('rgba', 'depth', 'stencil'): arb_framebuffer_object[test_name] = PlainExecTest(test_name + ' -auto') add_plain_test(arb_framebuffer_object, 'fbo-alpha') add_plain_test(arb_framebuffer_object, 'fbo-blit-stretch') +add_plain_test(arb_framebuffer_object, 'fbo-blit-scaled-linear') add_plain_test(arb_framebuffer_object, 'fbo-deriv') add_plain_test(arb_framebuffer_object, 'fbo-luminance-alpha') add_plain_test(arb_framebuffer_object, 'fbo-getframebufferattachmentparameter-01') diff --git a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt index 7f7958f..db26758 100644 --- a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt +++ b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt @@ -24,6 +24,7 @@ piglit_add_executable (ext_framebuffer_multisample-alpha-to-one-single-sample-bu piglit_add_executable (ext_framebuffer_multisample-bitmap common.cpp bitmap.cpp) piglit_add_executable (ext_framebuffer_multisample-blit-flipped common.cpp blit-flipped.cpp) piglit_add_executable (ext_framebuffer_multisample-blit-scaled common.cpp blit-scaled.cpp) +piglit_add_executable (fbo-blit-scaled-linear common.cpp blit-scaled-linear.cpp) piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-samples common.cpp blit-mismatched-samples.cpp) piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-sizes common.cpp blit-mismatched-sizes.cpp) piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-formats common.cpp blit-mismatched-formats.cpp) diff --git a/tests/spec/ext_framebuffer_multisample/blit-scaled-linear.cpp b/tests/spec/ext_framebuffer_multisample/blit-scaled-linear.cpp new file mode 100644 index 0000000..f92900f --- /dev/null +++ b/tests/spec/ext_framebuffer_multisample/blit-scaled-linear.cpp @@ -0,0 +1,297 @@ +/* + * 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. + */ + +/** \file blit-scaled-linear.cpp + * + * This test verifies the accuracy of scaled blitting from a single sample + * buffer with GL_LINEAR filter.It compares the output from following + * rendering scenarios: + * 1. Scaled blit using a framebuffer with texture/renderbuffer attachment. + * 2. Scaled blit using glsl shader program. + */ + +#include "common.h" +const int pattern_width = 258; const int pattern_height = 258; + +PIGLIT_GL_TEST_CONFIG_BEGIN + + config.supports_gl_compat_version = 10; + + config.window_width = pattern_width * 2; + config.window_height = pattern_height; + config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA; + +PIGLIT_GL_TEST_CONFIG_END + +static TestPattern *test_pattern; +static unsigned prog, vao, vertex_buf; +const int srcX0 = 0, srcY0 = 0, dstX0 = 0, dstY0 = 0; +const int srcX1 = pattern_width / 2, srcY1 = pattern_height / 2; +static Fbo fbo_tex, fbo_rb, fbo; + +void +compile_shader(void) +{ + static const char *vert = + "#version 130\n" + "uniform mat4 proj;\n" + "in vec2 pos;\n" + "in vec2 texCoord;\n" + "out vec2 textureCoord;\n" + "void main()\n" + "{\n" + " gl_Position = proj * vec4(pos, 0.0, 1.0);\n" + " textureCoord = texCoord;\n" + "}\n"; + /* Bilinear filtering of samples using shader program */ + static const char *frag = + "#version 130\n" + "#extension GL_ARB_texture_rectangle : enable\n" + "in vec2 textureCoord;\n" + "uniform sampler2DRect tex2d;\n" + "uniform float xmax;\n" + "uniform float ymax;\n" + "out vec4 out_color;\n" + "void main()\n" + "{\n" + " vec2 f;\n" + " vec4 c0, c1, c2, c3;\n" + " vec2 tex_coord = textureCoord - vec2(0.5, 0.5);\n" + "\n" + " tex_coord.xy = clamp(tex_coord.xy,\n" + " vec2(0.0, 0.0),\n" + " vec2 (xmax - 1.0, ymax - 1.0));\n" + "\n" + " f.x = fract(tex_coord.x);\n" + " f.y = fract(tex_coord.y);\n" + "\n" + " tex_coord.x = tex_coord.x - f.x;\n" + " tex_coord.y = tex_coord.y - f.y;\n" + "\n" + " c0 = texture2DRect(tex2d, tex_coord.xy + vec2(0, 0));\n" + " c1 = texture2DRect(tex2d, tex_coord.xy + vec2(1, 0));\n" + " c2 = texture2DRect(tex2d, tex_coord.xy + vec2(0, 1));\n" + " c3 = texture2DRect(tex2d, tex_coord.xy + vec2(1, 1));\n" + "\n" + " vec4 color_x1 = mix(c0, c1, f.x);\n" + " vec4 color_x2 = mix(c2, c3, f.x);\n" + "\n" + " out_color = mix(color_x1, color_x2, f.y);\n" + "}\n"; + /* Compile program */ + prog = glCreateProgram(); + GLint vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vert); + glAttachShader(prog, vs); + piglit_check_gl_error(GL_NO_ERROR); + GLint fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, frag); + glAttachShader(prog, fs); + glBindAttribLocation(prog, 0, "pos"); + glBindAttribLocation(prog, 1, "texCoord"); + glLinkProgram(prog); + if (!piglit_link_check_status(prog)) { + piglit_report_result(PIGLIT_FAIL); + } + + /* Set up vertex array object */ + glGenVertexArrays(1, &vao); + glBindVertexArray(vao); + + /* Set up vertex input buffer */ + glGenBuffers(1, &vertex_buf); + glBindBuffer(GL_ARRAY_BUFFER, vertex_buf); + glEnableVertexAttribArray(0); + glVertexAttribPointer(0, 2, GL_INT, GL_FALSE, 4*sizeof(float), + (void *) 0); + glEnableVertexAttribArray(1); + glVertexAttribPointer(1, 2, GL_INT, GL_FALSE, 4*sizeof(float), + (void *) (2*sizeof(float))); + + /* Set up element input buffer to tesselate a quad into + * triangles + */ + unsigned int indices[6] = { 0, 1, 2, 0, 2, 3 }; + GLuint element_buf; + glGenBuffers(1, &element_buf); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, element_buf); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, + GL_STATIC_DRAW); +} + +void +blit_scaled_linear_glsl(const Fbo *src_fbo, GLint samples) +{ + const float proj[4][4] = { + { 1, 0, 0, 0 }, + { 0, 1, 0, 0 }, + { 0, 0, 1, 0 }, + { 0, 0, 0, 1 }}; + + int vertex_data[4][4] = { + { -1, -1, srcX0, srcY0 }, + { -1, 1, srcX0, srcY1 }, + { 1, 1, srcX1, srcY1 }, + { 1, -1, srcX1, srcY0 }}; + + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_RECTANGLE, src_fbo->color_tex); + glUseProgram(prog); + glBindVertexArray(vao); + + /* Set up uniforms */ + glUseProgram(prog); + glUniform1i(glGetUniformLocation(prog, "tex2d"), 0); + glUniform1f(glGetUniformLocation(prog, "xmin"), 0); + glUniform1f(glGetUniformLocation(prog, "ymin"), 0); + glUniform1f(glGetUniformLocation(prog, "xmax"), + fbo_rb.config.width); + glUniform1f(glGetUniformLocation(prog, "ymax"), + fbo_rb.config.height); + glUniformMatrix4fv(glGetUniformLocation(prog, "proj"), 1, + GL_TRUE, &proj[0][0]); + + glBindBuffer(GL_ARRAY_BUFFER, vertex_buf); + glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), vertex_data, + GL_STREAM_DRAW); + glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, (void *) 0); +} + +void +piglit_init(int argc, char **argv) +{ + piglit_require_gl_version(21); + piglit_require_extension("GL_ARB_vertex_array_object"); + + fbo.setup(FboConfig(0, 2 * pattern_width, pattern_height)); + /* Create two singlesample FBOs with same format and dimensions but + * different color attachment types. + */ + FboConfig Config(0, pattern_width / 2, pattern_height / 2); + Config.attach_texture = true; + fbo_tex.setup(Config); + Config.attach_texture = false; + fbo_rb.setup(Config); + + test_pattern = new Triangles(); + test_pattern->compile(); + + compile_shader(); + if (!piglit_check_gl_error(GL_NO_ERROR)) { + piglit_report_result(PIGLIT_FAIL); + } +} + +bool test_blit_scaled_linear(Fbo fbo_test) +{ + GLfloat scale; + GLint samples; + bool pass = true, result = true; + + /* Draw the test pattern into the framebuffer with texture + * attachment. + */ + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_tex.handle); + glViewport(0, 0, srcX1, srcY1); + glGetIntegerv(GL_SAMPLES, &samples); + glClear(GL_COLOR_BUFFER_BIT); + test_pattern->draw(TestPattern::no_projection); + + if(!fbo_test.config.attach_texture) { + /* Blit the framebuffer with texture attachment into the + * framebuffer with renderbuffer attachment. + */ + glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_tex.handle); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_rb.handle); + glClear(GL_COLOR_BUFFER_BIT); + glBlitFramebuffer(0, 0, + fbo_tex.config.width, + fbo_tex.config.height, + 0, 0, + fbo_rb.config.width, + fbo_rb.config.height, + GL_COLOR_BUFFER_BIT, GL_NEAREST); + } + + for(scale = 0.1; scale < 2.5f; scale += 0.1) { + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo); + glClear(GL_COLOR_BUFFER_BIT); + + /* Do scaled resolve of fbo_rb to left half of + * fbo. + */ + glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_test.handle); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo.handle); + glClearColor(0.0, 1.0, 0.0, 1.0); + glClear(GL_COLOR_BUFFER_BIT); + glClearColor(0.0, 0.0, 0.0, 0.0); + glEnable(GL_SCISSOR_TEST); + glScissor(0, 0, pattern_width, pattern_height); + glBlitFramebuffer(srcX0, srcY0, + srcX1, srcY1, + dstX0, dstY0, + dstX0 + srcX1 * scale, dstY0 + srcY1 * scale, + GL_COLOR_BUFFER_BIT, + GL_LINEAR); + glDisable(GL_SCISSOR_TEST); + + /* Use fbo with texture attachment to draw in to right half of + * scaled single-sampled buffer using shader program. + */ + glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_tex.handle); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo.handle); + glViewport(pattern_width + dstX0, dstY0, srcX1 * scale, srcY1 * scale); + blit_scaled_linear_glsl(&fbo_tex, samples); + + pass = piglit_check_gl_error(GL_NO_ERROR) && pass; + glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo.handle); + result = piglit_probe_rect_halves_equal_rgba(0, 0, + piglit_width, + piglit_height); + pass = result && pass; + + glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo.handle); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo); + glBlitFramebuffer(0, 0, 2 * pattern_width, piglit_height, + 0, 0, 2 * pattern_width, piglit_height, + GL_COLOR_BUFFER_BIT, GL_NEAREST); + piglit_present_results(); + printf("Attachment = %12s, scale = %f, result = %s\n", + fbo_test.config.attach_texture ? + "TEXTURE" : + "RENDERBUFFER", + scale, result ? "pass" : "fail"); + } + return pass; +} + +enum piglit_result +piglit_display() +{ + bool pass = true; + printf("Left Image: Linear scaled blit using glBlitFramebuffer.\n" + "Right Image: Linear scaled blit using glsl.\n"); + pass = test_blit_scaled_linear(fbo_tex) + && pass; + pass = test_blit_scaled_linear(fbo_rb) + && pass; + return pass ? PIGLIT_PASS : PIGLIT_FAIL; +} -- 1.8.1.4 _______________________________________________ Piglit mailing list <a href="mailto:Piglit@lists.freedesktop.org">Piglit@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/piglit" target="_blank">http://lists.freedesktop.org/mailman/listinfo/piglit</a> </blockquote></div> </div></div>