diff options
Diffstat (limited to 'src/video/opengl.cpp')
| -rw-r--r-- | src/video/opengl.cpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/video/opengl.cpp b/src/video/opengl.cpp index b5ce12dee..4a6de2825 100644 --- a/src/video/opengl.cpp +++ b/src/video/opengl.cpp @@ -68,6 +68,7 @@ static PFNGLGETATTRIBLOCATIONPROC _glGetAttribLocation; static PFNGLENABLEVERTEXATTRIBARRAYPROC _glEnableVertexAttribArray; static PFNGLDISABLEVERTEXATTRIBARRAYPROC _glDisableVertexAttribArray; static PFNGLVERTEXATTRIBPOINTERARBPROC _glVertexAttribPointer; +static PFNGLBINDFRAGDATALOCATIONPROC _glBindFragDataLocation; /** A simple 2D vertex with just position and texture. */ struct Simple2DVertex { @@ -243,6 +244,15 @@ static bool BindShaderExtensions() _glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERARBPROC)GetOGLProcAddress("glVertexAttribPointerARB"); } + /* Bind functions only needed when using GLSL 1.50 shaders. */ + if (IsOpenGLVersionAtLeast(3, 0)) { + _glBindFragDataLocation = (PFNGLBINDFRAGDATALOCATIONPROC)GetOGLProcAddress("glBindFragDataLocation"); + } else if (IsOpenGLExtensionSupported("GL_EXT_gpu_shader4")) { + _glBindFragDataLocation = (PFNGLBINDFRAGDATALOCATIONPROC)GetOGLProcAddress("glBindFragDataLocationEXT"); + } else { + _glBindFragDataLocation = nullptr; + } + return _glCreateProgram != nullptr && _glDeleteProgram != nullptr && _glLinkProgram != nullptr && _glGetProgramiv != nullptr && _glGetProgramInfoLog != nullptr && _glCreateShader != nullptr && _glDeleteShader != nullptr && _glShaderSource != nullptr && _glCompileShader != nullptr && _glAttachShader != nullptr && _glGetShaderiv != nullptr && _glGetShaderInfoLog != nullptr && _glGetUniformLocation != nullptr && _glUniform1i != nullptr && @@ -386,6 +396,7 @@ const char *OpenGLBackend::Init() /* Check for shader objects. */ if (!IsOpenGLVersionAtLeast(2, 0) && (!IsOpenGLExtensionSupported("GL_ARB_shader_objects") || !IsOpenGLExtensionSupported("GL_ARB_fragment_shader") || !IsOpenGLExtensionSupported("GL_ARB_vertex_shader"))) return "No shader support"; if (!BindShaderExtensions()) return "Failed to bind shader extension functions"; + if (IsOpenGLVersionAtLeast(3, 2) && _glBindFragDataLocation == nullptr) return "OpenGL claims to support version 3.2 but doesn't have glBindFragDataLocation"; DEBUG(driver, 2, "OpenGL shading language version: %s", (const char *)glGetString(GL_SHADING_LANGUAGE_VERSION)); @@ -506,7 +517,7 @@ bool OpenGLBackend::InitShaders() int glsl_major = ver[0] - '0'; int glsl_minor = ver[2] - '0'; - bool glsl_150 = (IsOpenGLVersionAtLeast(3, 2) || glsl_major > 1 || (glsl_major == 1 && glsl_minor >= 5)); + bool glsl_150 = (IsOpenGLVersionAtLeast(3, 2) || glsl_major > 1 || (glsl_major == 1 && glsl_minor >= 5)) && _glBindFragDataLocation != nullptr; /* Create vertex shader. */ GLuint vert_shader = _glCreateShader(GL_VERTEX_SHADER); @@ -524,6 +535,12 @@ bool OpenGLBackend::InitShaders() this->vid_program = _glCreateProgram(); _glAttachShader(this->vid_program, vert_shader); _glAttachShader(this->vid_program, frag_shader); + + if (glsl_150) { + /* Bind fragment shader outputs. */ + _glBindFragDataLocation(this->vid_program, 0, "colour"); + } + _glLinkProgram(this->vid_program); if (!VerifyProgram(this->vid_program)) return false; |