Attachment 129380 Details for Bug 99532 – A minimal reproducer

A minimal reproducer

testcomp.c (text/x-csrc), 4.99 KB, created by Boyan Ding on 2017-02-07 12:01:11 UTC

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Creator: Boyan Ding

Created: 2017-02-07 12:01:11 UTC

Size: 4.99 KB

patch

obsolete

>#include <string.h>
>#include <stdio.h>
>#include <unistd.h>
>
>#include <GL/glew.h>
>#include <GL/glx.h>
>#include <GLFW/glfw3.h>
>
>char cs_src[] = "#version 330\n"
>"#extension GL_ARB_compute_shader : enable\n"
>"#extension GL_ARB_shader_image_load_store : enable\n"
>"#extension GL_ARB_shading_language_420pack : enable\n"
>"\n"
>"layout(local_size_x = 32, local_size_y = 32) in;\n"
>"\n"
>"layout(binding = 1) uniform sampler2D c1Map;\n"
>"layout(binding = 2) uniform sampler2D c2Map;\n"
>"layout(binding = 3) uniform sampler2D czMap;\n"
>"layout(binding = 0, rgba8) writeonly uniform image2D img;\n"
>"\n"
>"void main()\n"
>"{\n\t"
>"vec2 coord = (gl_LocalInvocationID.xy + vec2(0.5)) / 32.0;\n\t"
>"imageStore(img, ivec2(gl_LocalInvocationID.xy), texture(c1Map, coord));\n\t"
>"imageStore(img, ivec2(gl_LocalInvocationID.xy) + ivec2(32, 0), texture(c2Map, coord));\n\t"
>"imageStore(img, ivec2(gl_LocalInvocationID.xy) + ivec2(0, 32), vec4(texture(czMap, coord).xxx, 1.0));\n\t"
>"imageStore(img, ivec2(gl_LocalInvocationID.xy) + ivec2(32, 32), vec4(0, 0, 0, 1.0));\n"
>"}";
>
>char vs_src[] = "#version 330\n"
>"\n"
>"out vec2 tc;\n"
>"\n"
>"void main()\n"
>"{\n\t"
>"vec2 verts[4] = vec2[](vec2(-1.0, -1.0), vec2(1.0, -1.0),\n\t\t"
>"vec2(-1.0, 1.0), vec2(1.0, 1.0));\n\t"
>"gl_Position = vec4(verts[gl_VertexID], gl_VertexID / 3.0, 1.0);\n\t"
>"tc = (verts[gl_VertexID] + vec2(1.0)) / 2.0;\n"
>"}";
>
>char fs1_src[] = "#version 330\n"
>"\n"
>"layout(location = 0) out vec4 color;\n"
>"layout(location = 1) out vec4 color2;\n"
>"\n"
>"void main()\n"
>"{\n\t"
>"color = vec4(1.0, 0.0, 0.0, 1.0);\n\t"
>"color2 = vec4(0.0, 1.0, 0.0, 1.0);\n"
>"}";
>
>char fs2_src[] = "#version 330\n"
>"#extension GL_ARB_shading_language_420pack : enable\n"
>"\n"
>"layout(binding = 1) uniform sampler2D cMap;\n"
>"\n"
>"in vec2 tc;\n"
>"layout(location = 0) out vec4 color;\n"
>"\n"
>"void main()\n"
>"{\n\t"
>"color = texture(cMap, tc);\n"
>"}";
>
>int main()
>{
>	GLFWwindow *window;
>	GLuint cs, fs1, fs2, vs;
>	GLuint cs_prog, quad_prog1, quad_prog2;
>	GLuint fbo;
>	GLuint tex1, tex2, texz, teximg, img;
>	GLuint vao;
>	int len;
>	const char *pstr;
>	float *pf;
>
>	glfwInit();
>	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
>	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
>	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
>	window = glfwCreateWindow(32, 32, "GL", NULL, NULL);
>	glfwMakeContextCurrent(window);
>
>	glewInit();
>
>	glCreateVertexArrays(1, &vao);
>	glBindVertexArray(vao);
>
>	// Create Compute program
>	cs = glCreateShader(GL_COMPUTE_SHADER);
>	len = strlen(cs_src);
>	pstr = cs_src;
>	glShaderSource(cs, 1, &pstr, &len);
>	glCompileShader(cs);
>	cs_prog = glCreateProgram();
>	glAttachShader(cs_prog, cs);
>	glLinkProgram(cs_prog);
>	glDeleteShader(cs);
>
>	// Create two trivial quad program
>	vs = glCreateShader(GL_VERTEX_SHADER);
>	len = strlen(vs_src);
>	pstr = vs_src;
>	glShaderSource(vs, 1, &pstr, &len);
>	glCompileShader(vs);
>	fs1 = glCreateShader(GL_FRAGMENT_SHADER);
>	len = strlen(fs1_src);
>	pstr = fs1_src;
>	glShaderSource(fs1, 1, &pstr, &len);
>	glCompileShader(fs1);
>	quad_prog1 = glCreateProgram();
>	glAttachShader(quad_prog1, vs);
>	glAttachShader(quad_prog1, fs1);
>	glLinkProgram(quad_prog1);
>	fs2 = glCreateShader(GL_FRAGMENT_SHADER);
>	len = strlen(fs2_src);
>	pstr = fs2_src;
>	glShaderSource(fs2, 1, &pstr, &len);
>	glCompileShader(fs2);
>	quad_prog2 = glCreateProgram();
>	glAttachShader(quad_prog2, vs);
>	glAttachShader(quad_prog2, fs2);
>	glLinkProgram(quad_prog2);
>	glDeleteShader(vs);
>	glDeleteShader(fs1);
>	glDeleteShader(fs2);
>
>	// Textures
>	glCreateTextures(GL_TEXTURE_2D, 1, &tex1);
>	glTextureStorage2D(tex1, 1, GL_RGBA8, 32, 32);
>	glCreateTextures(GL_TEXTURE_2D, 1, &tex2);
>	glTextureStorage2D(tex2, 1, GL_RGBA8, 32, 32);
>	glCreateTextures(GL_TEXTURE_2D, 1, &texz);
>	glTextureStorage2D(texz, 1, GL_DEPTH_COMPONENT16, 32, 32);
>	glCreateTextures(GL_TEXTURE_2D, 1, &teximg);
>	glTextureStorage2D(teximg, 1, GL_RGBA8, 64, 64);
>
>	// FBO
>	glCreateFramebuffers(1, &fbo);
>	glNamedFramebufferTexture(fbo, GL_COLOR_ATTACHMENT0, tex1, 0);
>	glNamedFramebufferTexture(fbo, GL_COLOR_ATTACHMENT1, tex2, 0);
>	glNamedFramebufferTexture(fbo, GL_DEPTH_ATTACHMENT, texz, 0);
>	GLenum drawbufs[] = {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1};
>	glNamedFramebufferDrawBuffers(fbo, 2, drawbufs);
>
>	// Image
>	glBindImageTexture(0, teximg, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA8);
>
>	glViewport(0, 0, 32, 32);
>	glEnable(GL_DEPTH_TEST);
>	
>	glBindTextureUnit(2, tex2);
>	glBindTextureUnit(3, texz);
>	do {
>		glBindFramebuffer(GL_FRAMEBUFFER, fbo);
>		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>		glUseProgram(quad_prog1);
>		glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
>
>		glBindTextureUnit(1, tex1);
>		glUseProgram(cs_prog);
>		glDispatchCompute(1, 1, 1);
>		glMemoryBarrier(GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
>
>		glBindFramebuffer(GL_FRAMEBUFFER, 0);
>		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>		glBindTextureUnit(1, teximg);
>		glUseProgram(quad_prog2);
>		glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
>		glfwSwapBuffers(window);
>		glfwPollEvents();
>	} while (glfwGetKey(window, GLFW_KEY_ESCAPE) != GLFW_PRESS &&
>		 glfwWindowShouldClose(window) == 0);
>
>	glfwTerminate();
>
>	return 0;
>}

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Attachments on bug 99532: 129135 | 129136 | 129137 | 129157 | 129158 | 129380 | 129381 | 129382

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