Attachment 122159 Details for Bug 94444 – Main bug source

Main bug source

bug.c (text/plain), 2.61 KB, created by org.freedesktop on 2016-03-08 14:35:01 UTC

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Creator: org.freedesktop

Created: 2016-03-08 14:35:01 UTC

Size: 2.61 KB

patch

obsolete

>#define GL_GLEXT_PROTOTYPES 1
>#include <assert.h>
>#include <GL/glcorearb.h>
>#include "example.h"
>#include <stdio.h>
>#include <string.h>
>
>static GLuint vbo;
>static GLuint vao;
>static GLuint fbo;
>static GLuint texture;
>
>static void
>check_error()
>{
>  int e = glGetError();
>  assert (e == GL_NO_ERROR);
>}
>
>static const char *vs_source = "#version 330 core\n in vec4 position;\n void main() {\n gl_Position = position; }";
>static const char *fs_source = "#version 330 core\n out vec2 o_color; void main() { o_color = vec2 (1.0, 1.0); }";
>
>static const GLenum draw_buffers[] = {
>  GL_NONE,
>  GL_NONE,
>  GL_NONE,
>  GL_NONE,
>  GL_NONE,
>  GL_NONE,
>  GL_NONE,
>  GL_NONE
>};
>
>void
>example_init()
>{
>  glGenVertexArrays(1, &vao);
>
>  glGenBuffers(1, &vbo);
>  glBindBuffer(GL_ARRAY_BUFFER, vbo);
>  glBufferData(GL_ARRAY_BUFFER, 4 * 4, (void *) 0L, GL_STATIC_DRAW);
>
>  glBindVertexArray(vao);
>  glEnableVertexAttribArray(0);
>  glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
>  glBindBuffer(GL_ARRAY_BUFFER, 0);
>  glBindVertexArray(0);
>
>  const int vs = glCreateShader(GL_VERTEX_SHADER);
>  const int vs_length = strlen(vs_source);
>  glShaderSource(vs, 1,  (const char **) &vs_source, &vs_length);
>  glCompileShader(vs);
>
>  const int fs = glCreateShader(GL_FRAGMENT_SHADER);
>  const int fs_length = strlen(fs_source);
>  glShaderSource(fs, 1,  (const char **) &fs_source, &fs_length);
>  glCompileShader(fs);
>
>  const int program = glCreateProgram();
>  glAttachShader(program, vs);
>  glAttachShader(program, fs);
>  glLinkProgram(program);
>  glUseProgram(program);
>
>  glGenTextures(1, &texture);
>  glActiveTexture(GL_TEXTURE0);
>  glBindTexture(GL_TEXTURE_2D, texture);
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>  glPixelStorei(GL_PACK_ALIGNMENT, 1);
>  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
>  glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, 640, 480, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
>  glBindTexture(GL_TEXTURE_2D, 0);
>
>  glGenFramebuffers(1, &fbo);
>  glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
>  glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, texture, 0);
>  glDrawBuffers(8, draw_buffers);
>  assert (glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
>
>  check_error();
>}
>
>void
>example_render()
>{
>  glClearColor(0.0, 0.0, 0.0, 1.0);
>  glClear(GL_COLOR_BUFFER_BIT);
>
>  glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
>  glBindVertexArray(vao);
>  glDrawArrays(GL_POINTS, 0, 1);
>}
>

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Attachments on bug 94444: 122158 | 122159 | 122160 | 122161 | 122162

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