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API for Uniform Block Objects

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Kovid Goyal
2017-08-30 09:20:35 +05:30
parent b1168f6c6c
commit d7b433f6b7
2 changed files with 98 additions and 9 deletions
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63
kitty/gl.h
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@@ -425,6 +425,16 @@ GetUniformLocation(PyObject UNUSED *self, PyObject *args) {
return PyLong_FromLong((long) ans);
}
static PyObject*
GetUniformBlockIndex(PyObject UNUSED *self, PyObject *args) {
char *name;
unsigned int program_id;
if(!PyArg_ParseTuple(args, "Is", &program_id, &name)) return NULL;
GLuint ans = glGetUniformBlockIndex(program_id, name);
if (ans == GL_INVALID_INDEX) { PyErr_SetString(PyExc_ValueError, "No such uniform block is active"); return NULL; }
return PyLong_FromUnsignedLong((unsigned long) ans);
}
static PyObject*
GetAttribLocation(PyObject UNUSED *self, PyObject *args) {
char *name;
@@ -435,6 +445,44 @@ GetAttribLocation(PyObject UNUSED *self, PyObject *args) {
return PyLong_FromLong((long) ans);
}
static PyObject*
get_uniform_block_size(PyObject UNUSED *self, PyObject *args) {
unsigned int program_id, block_index;
if(!PyArg_ParseTuple(args, "II", &program_id, &block_index)) return NULL;
GLint ans;
glGetActiveUniformBlockiv(program_id, block_index, GL_UNIFORM_BLOCK_DATA_SIZE, &ans);
CHECK_ERROR;
return PyLong_FromLong((long) ans);
}
static PyObject*
get_uniform_block_offsets(PyObject UNUSED *self, PyObject *args) {
unsigned int program_id;
PyObject *pynames;
if(!PyArg_ParseTuple(args, "IO", &program_id, &pynames)) return NULL;
if (!PySequence_Check(pynames)) { PyErr_SetString(PyExc_TypeError, "names must be a sequence"); return NULL; }
GLsizei count = PySequence_Size(pynames);
char **names = PyMem_Calloc(count, sizeof(char*));
GLuint *indices = PyMem_Calloc(count, sizeof(GLuint));
GLint *offsets = PyMem_Calloc(count, sizeof(GLint));
PyObject *ans = PyTuple_New(count);
if (ans == NULL || indices == NULL || names == NULL) return PyErr_NoMemory();
for (GLsizei i = 0; i < count; i++) {
PyObject *t = PySequence_ITEM(pynames, i);
names[i] = PyUnicode_AsUTF8(t);
Py_CLEAR(t);
}
glGetUniformIndices(program_id, count, (const GLchar * const*)names, indices);
glGetActiveUniformsiv(program_id, count, indices, GL_UNIFORM_OFFSET, offsets);
for (GLsizei i = 0; i < count; i++) PyTuple_SET_ITEM(ans, i, PyLong_FromLong(offsets[i]));
PyMem_Free(names); PyMem_Free(indices); PyMem_Free(offsets);
if (_enable_error_checking) {
SET_GL_ERR;
if (PyErr_Occurred()) { Py_CLEAR(ans); return NULL; }
}
return ans;
}
static PyObject*
UseProgram(PyObject UNUSED *self, PyObject *val) {
unsigned long program_id = PyLong_AsUnsignedLong(val);
@@ -620,6 +668,15 @@ BindBuffer(PyObject UNUSED *self, PyObject *args) {
Py_RETURN_NONE;
}
static PyObject*
BindBufferBase(PyObject UNUSED *self, PyObject *args) {
int tgt; unsigned int index, buf_id;
if (!PyArg_ParseTuple(args, "iII", &tgt, &index, &buf_id)) return NULL;
glBindBufferBase(tgt, index, buf_id);
CHECK_ERROR;
Py_RETURN_NONE;
}
static PyObject*
TexBuffer(PyObject UNUSED *self, PyObject *args) {
int tgt, fmt; unsigned int buf_id;
@@ -777,7 +834,7 @@ int add_module_gl_constants(PyObject *module) {
GLC(GL_R8); GLC(GL_RED); GLC(GL_UNSIGNED_BYTE); GLC(GL_R32UI); GLC(GL_RGB32UI); GLC(GL_RGBA);
GLC(GL_TEXTURE_BUFFER); GLC(GL_STATIC_DRAW); GLC(GL_STREAM_DRAW);
GLC(GL_SRC_ALPHA); GLC(GL_ONE_MINUS_SRC_ALPHA);
GLC(GL_BLEND); GLC(GL_FLOAT); GLC(GL_UNSIGNED_INT); GLC(GL_ARRAY_BUFFER);
GLC(GL_BLEND); GLC(GL_FLOAT); GLC(GL_UNSIGNED_INT); GLC(GL_ARRAY_BUFFER); GLC(GL_UNIFORM_BUFFER);
return 1;
}
@@ -788,6 +845,8 @@ int add_module_gl_constants(PyObject *module) {
{"replace_or_create_buffer", (PyCFunction)replace_or_create_buffer, METH_VARARGS, NULL}, \
{"glewInit", (PyCFunction)_glewInit, METH_NOARGS, NULL}, \
{"check_for_extensions", (PyCFunction)check_for_extensions, METH_NOARGS, NULL}, \
{"get_uniform_block_size", (PyCFunction)get_uniform_block_size, METH_VARARGS, NULL}, \
{"get_uniform_block_offsets", (PyCFunction)get_uniform_block_offsets, METH_VARARGS, NULL}, \
METH(Viewport, METH_VARARGS) \
METH(CheckError, METH_NOARGS) \
METH(ClearColor, METH_VARARGS) \
@@ -802,6 +861,7 @@ int add_module_gl_constants(PyObject *module) {
METH(Uniform4f, METH_VARARGS) \
METH(Uniform3fv, METH_VARARGS) \
METH(GetUniformLocation, METH_VARARGS) \
METH(GetUniformBlockIndex, METH_VARARGS) \
METH(GetAttribLocation, METH_VARARGS) \
METH(ShaderSource, METH_VARARGS) \
METH(CompileShader, METH_O) \
@@ -837,6 +897,7 @@ int add_module_gl_constants(PyObject *module) {
METH(TexParameteri, METH_VARARGS) \
METH(PixelStorei, METH_VARARGS) \
METH(BindBuffer, METH_VARARGS) \
METH(BindBufferBase, METH_VARARGS) \
METH(TexBuffer, METH_VARARGS) \
METH(TexStorage3D, METH_VARARGS) \
METH(CopyImageSubData, METH_VARARGS) \