Cleanup: remove slot from texture.

__init__.py

@@ -254,7 +254,6 @@ resolve_param.argtypes = (
 _create_texture = _lib.rk_create_texture
 _create_texture.restype = ctypes.c_void_p
 _create_texture.argtypes = (
-    ctypes.c_uint, # slot
     ctypes.c_uint, # format
     ctypes.c_uint, # width
     ctypes.c_uint, # height
@@ -262,10 +261,10 @@ _create_texture.argtypes = (
     ctypes.c_uint, # flags
     ctypes.c_void_p) # pixels
 
-def create_texture(slot, format, width, height, nlevels, flags, pixels):
+def create_texture(format, width, height, nlevels, flags, pixels):
     assert pixels.typecode == TEXTURE_FORMAT_TYPECODE[format]
     assert len(pixels) == width * height * max(1, nlevels) * TEXTURE_FORMAT_NELEMS[format]
-    return _create_texture(slot, format, width, height, nlevels, flags, _voidp(pixels))
+    return _create_texture(format, width, height, nlevels, flags, _voidp(pixels))
 
 _create_triangles = _lib.rk_create_triangles
 _create_triangles.restype = ctypes.c_void_p
@@ -345,6 +344,7 @@ def set_param_vec3(param, value):
 
 select_texture = _lib.rk_select_texture
 select_texture.argtypes = (
+    ctypes.c_uint, # slot
     ctypes.c_void_p, # texture
     ctypes.c_void_p) # sampler
 
@@ -375,7 +375,8 @@ unselect_vertices.argtypes = (
 
 unselect_texture = _lib.rk_unselect_texture
 unselect_texture.argtypes = (
-    ctypes.c_void_p,) # texture
+    ctypes.c_uint, # slot
+    ctypes.c_void_p) # texture
 
 unselect_shader = _lib.rk_unselect_shader
 unselect_shader.argtypes = (

cpp/opengl/render_opengles.cpp

@@ -145,7 +145,6 @@ rk_param_t rk_resolve_param(
 }
 
 rk_texture_t rk_create_texture(
-    rk_uint slot,
     rk_texture_format format,
     rk_uint width,
     rk_uint height,
@@ -184,7 +183,6 @@ rk_texture_t rk_create_texture(
             break;
     }
     rk_texture * const texture = new rk_texture;
-    glActiveTexture(GL_TEXTURE0 + slot);
     glGenTextures(1, &texture->texture);
     GLenum target;
     if (nlevels) {
@@ -226,7 +224,6 @@ rk_texture_t rk_create_texture(
     if (flags & RK_TEXTURE_FLAG_MIPMAPS) {
         glGenerateMipmap(target);
     }
-    texture->slot = slot;
     texture->nlevels = nlevels;
     glBindTexture(target, 0);
     return texture;
@@ -499,18 +496,19 @@ void rk_set_param_vec3(
 }
 
 void rk_select_texture(
+    rk_uint slot,
     rk_texture_t _texture,
     rk_input_t _sampler) {
     rk_texture const * const texture = reinterpret_cast<rk_texture const *>(_texture);
     GLint const sampler = reinterpret_cast<intptr_t>(_sampler) - 1;
     if (texture && sampler > -1 && rk_current_shader) {
-        glActiveTexture(GL_TEXTURE0 + texture->slot);
+        glActiveTexture(GL_TEXTURE0 + slot);
         if (texture->nlevels) {
             glBindTexture(GL_TEXTURE_2D_ARRAY, texture->texture);
         } else {
             glBindTexture(GL_TEXTURE_2D, texture->texture);
         }
-        glUniform1i(sampler, texture->slot);
+        glUniform1i(sampler, slot);
     }
 }
 
@@ -651,10 +649,11 @@ void rk_unselect_vertices(
 }
 
 void rk_unselect_texture(
+    rk_uint slot,
     rk_texture_t _texture) {
     rk_texture const * const texture = reinterpret_cast<rk_texture const *>(_texture);
     if (texture) {
-        glActiveTexture(GL_TEXTURE0 + texture->slot);
+        glActiveTexture(GL_TEXTURE0 + slot);
         if (texture->nlevels) {
             glBindTexture(GL_TEXTURE_2D, 0);
         } else {

cpp/opengl/render_opengles.hpp

@@ -34,7 +34,6 @@ struct rk_shader {
 };
 
 struct rk_texture {
-    rk_uint slot;
     rk_uint nlevels;
     GLuint texture;
 };

cpp/render.hpp

@@ -101,7 +101,6 @@ RK_EXPORT rk_param_t rk_resolve_param(
     char const * name);
 
 RK_EXPORT rk_texture_t rk_create_texture(
-    rk_uint slot,
     rk_texture_format format,
     rk_uint width,
     rk_uint height,
@@ -151,6 +150,7 @@ RK_EXPORT void rk_set_param_vec3(
     rk_vec3 const & value);
 
 RK_EXPORT void rk_select_texture(
+    rk_uint slot,
     rk_texture_t texture,
     rk_input_t sampler);
 
@@ -171,6 +171,7 @@ RK_EXPORT void rk_unselect_vertices(
     rk_vertices_t vertices);
 
 RK_EXPORT void rk_unselect_texture(
+    rk_uint slot,
     rk_texture_t texture);
 
 RK_EXPORT void rk_unselect_shader(