diff options
Diffstat (limited to 'glview.cc')
| -rw-r--r-- | glview.cc | 117 |
1 files changed, 62 insertions, 55 deletions
@@ -22,6 +22,7 @@ #include <QWheelEvent> #include <QMouseEvent> +#include <GL/glew.h> #define FAR_FAR_AWAY 100000.0 @@ -37,74 +38,80 @@ GLView::GLView(QWidget *parent) : QGLWidget(parent) renderfunc = NULL; renderfunc_vp = NULL; + edgeshader_prog = 0; setMouseTracking(true); } +extern GLint e1, e2, e3; + void GLView::initializeGL() { + GLenum err = glewInit(); + if (GLEW_OK != err) { + fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err)); + } + glEnable(GL_DEPTH_TEST); glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY); glClearColor(1.0, 1.0, 0.9, 0.0); -#if 0 - char *vs_source = - "attribute float e1, e2, e3;\n" - "varying float ve1, ve2, ve3;\n" - "void main() {\n" - " gl_FrontColor = gl_Color;\n" - " gl_Position = ftransform();\n" - " ve1 = e1; ve2 = e2; ve3 = e3;\n" - "}\n"; - - char *fs_source = - "#extension GL_EXT_gpu_shader4 : enable\n" - "varying float ve1, ve2, ve3;\n" - "void main() {\n" - " gl_FragColor = vec4(1.0,0.0,0.0,1.0);\n" - " if (ve1 > 0.9 || ve2 > 0.9 || ve3 > 0.9)\n" - " gl_FragColor = vec4(0.0,1.0,0.0,1.0);\n" - " gl_FragColor = gl_FrontColor;\n" - "}\n"; - - GLuint edgeshader_prog = glCreateProgram(); - - GLuint vs = glCreateShader(GL_VERTEX_SHADER); - glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL); - glCompileShader(vs); - glAttachShader(edgeshader_prog, vs); - - GLuint fs = glCreateShader(GL_FRAGMENT_SHADER); - glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL); - glCompileShader(fs); - glAttachShader(edgeshader_prog, fs); - - glLinkProgram(edgeshader_prog); - - GLint status; - glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status); - if (status == GL_FALSE) { - int loglen; - char logbuffer[1000]; - glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); - fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer); - } else { - int loglen; - char logbuffer[1000]; - glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); - if (loglen > 0) { - fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer); - } - glValidateProgram(edgeshader_prog); - glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); - if (loglen > 0) { - fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer); + if (glewIsSupported("GL_VERSION_2_0")) + { + char *vs_source = + "attribute float e1, e2, e3;\n" + "varying float ve1, ve2, ve3;\n" + "void main() {\n" + " gl_FrontColor = gl_Color;\n" + " gl_Position = ftransform();\n" + " ve1 = e1; ve2 = e2; ve3 = e3;\n" + "}\n"; + + char *fs_source = + "varying float ve1, ve2, ve3;\n" + "void main() {\n" + " gl_FragColor = vec4(249.0/255.0, 215.0/255.0, 44.0/255.0, 1.0);\n" + " if (ve1 > 0.95 || ve2 > 0.95 || ve3 > 0.95)\n" + " gl_FragColor = vec4(255.0/255.0, 236.0/255.0, 94.0/255.0, 1.0);\n" + "}\n"; + + GLuint vs = glCreateShader(GL_VERTEX_SHADER); + glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL); + glCompileShader(vs); + + GLuint fs = glCreateShader(GL_FRAGMENT_SHADER); + glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL); + glCompileShader(fs); + + edgeshader_prog = glCreateProgram(); + glAttachShader(edgeshader_prog, vs); + glAttachShader(edgeshader_prog, fs); + glLinkProgram(edgeshader_prog); + + GLint status; + glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status); + if (status == GL_FALSE) { + int loglen; + char logbuffer[1000]; + glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); + fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer); + } else { + int loglen; + char logbuffer[1000]; + glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); + if (loglen > 0) { + fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer); + } + glValidateProgram(edgeshader_prog); + glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer); + if (loglen > 0) { + fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer); + } } + } else { + fprintf(stdout, "GLEW: GL_VERSION_2_0 is not supported!\n"); } - - glUseProgram(edgeshader_prog); -#endif } void GLView::resizeGL(int w, int h) |