diff options
Diffstat (limited to 'src/OpenGLSupport.cpp')
| -rw-r--r-- | src/OpenGLSupport.cpp | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/OpenGLSupport.cpp b/src/OpenGLSupport.cpp index 958930d..f1914fc 100644 --- a/src/OpenGLSupport.cpp +++ b/src/OpenGLSupport.cpp @@ -29,6 +29,12 @@ bool BuildShaderProgram(const char* vs, const char* fs, GLuint* ids, const char* int len; int res; + if (!glCreateShader) + { + Log(LogLevel::Error, "OpenGL: Cannot build shader program, OpenGL hasn't been loaded\n"); + return false; + } + ids[0] = glCreateShader(GL_VERTEX_SHADER); len = strlen(vs); glShaderSource(ids[0], 1, &vs, &len); @@ -87,6 +93,12 @@ bool LinkShaderProgram(GLuint* ids) { int res; + if (!glLinkProgram) + { + Log(LogLevel::Error, "OpenGL: Cannot link shader program, OpenGL hasn't been loaded\n"); + return false; + } + glLinkProgram(ids[2]); glDetachShader(ids[2], ids[0]); @@ -115,12 +127,18 @@ bool LinkShaderProgram(GLuint* ids) void DeleteShaderProgram(GLuint* ids) { - glDeleteProgram(ids[2]); + if (glDeleteProgram) + { // If OpenGL isn't loaded, then there's no shader program to delete + glDeleteProgram(ids[2]); + } } void UseShaderProgram(GLuint* ids) { - glUseProgram(ids[2]); + if (glUseProgram) + { // If OpenGL isn't loaded, then there's no shader program to use + glUseProgram(ids[2]); + } } } |