Add a usage parameter to Buffer

[libs/gl.git] / source / core / buffer.cpp

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index ecf7b49a15e35d29493c83f1a6ea2f8013065483..15a37397bcb18bdf094b5e5a5cef1a7d31b38c31 100644 (file)
--- a/source/core/buffer.cpp
+++ b/source/core/buffer.cpp
@@ -1,38 +1,14 @@
 #include <stdexcept>
-#include <msp/gl/extensions/arb_buffer_storage.h>
-#include <msp/gl/extensions/arb_direct_state_access.h>
-#include <msp/gl/extensions/arb_map_buffer_range.h>
-#include <msp/gl/extensions/khr_debug.h>
 #include <msp/strings/format.h>
 #include "buffer.h"
-#include "deviceinfo.h"
 #include "error.h"
-#include "misc.h"
-#include "vertexsetup.h"
 
 using namespace std;
 
 namespace Msp {
 namespace GL {
 
-Buffer::Buffer():
-       size(0),
-       allocated(false)
-{
-       static Require _req(ARB_vertex_buffer_object);
-
-       if(ARB_direct_state_access)
-               glCreateBuffers(1, &id);
-       else
-               glGenBuffers(1, &id);
-}
-
-Buffer::~Buffer()
-{
-       glDeleteBuffers(1, &id);
-}
-
-void Buffer::storage(unsigned sz)
+void Buffer::storage(size_t sz, BufferUsage u)
 {
        if(size>0)
        {
@@ -44,131 +20,31 @@ void Buffer::storage(unsigned sz)
                throw invalid_argument("Buffer::storage");
 
        size = sz;
-}
-
-void Buffer::allocate()
-{
-       if(size==0)
-               throw invalid_operation("Buffer::allocate");
-       if(allocated)
-               return;
+       usage = u;
 
-       if(ARB_buffer_storage)
-       {
-               static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
-               if(ARB_direct_state_access)
-                       glNamedBufferStorage(id, size, 0, flags);
-               else
-               {
-                       glBindBuffer(GL_ARRAY_BUFFER, id);
-                       glBufferStorage(GL_ARRAY_BUFFER, size, 0, flags);
-                       glBindBuffer(GL_ARRAY_BUFFER, 0);
-               }
-
-               allocated = true;
-       }
-       else
-               data(0);
-}
-
-void Buffer::set_usage(BufferUsage)
-{
+       allocate();
 }
 
 void Buffer::data(const void *d)
 {
-       if(size==0)
-               throw invalid_operation("Buffer::data");
-
-       if(ARB_buffer_storage)
-               return sub_data(0, size, d);
-
-       if(ARB_direct_state_access)
-               glNamedBufferData(id, size, d, STATIC_DRAW);
-       else
-       {
-               glBindBuffer(GL_ARRAY_BUFFER, id);
-               glBufferData(GL_ARRAY_BUFFER, size, d, STATIC_DRAW);
-               glBindBuffer(GL_ARRAY_BUFFER, 0);
-       }
-
-       allocated = true;
+       return sub_data(0, size, d);
 }
 
-void Buffer::data(unsigned sz, const void *d)
-{
-       if(size==0)
-               storage(sz);
-       else if(sz!=size)
-               throw incompatible_data("Buffer::data");
-
-       data(d);
-}
-
-void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
+void Buffer::sub_data(size_t off, size_t sz, const void *d)
 {
        if(size==0)
                throw invalid_operation("Buffer::sub_data");
+       if(off>size || off+sz>size)
+               throw out_of_range("Buffer::sub_data");
 
-       allocate();
-
-       if(ARB_direct_state_access)
-               glNamedBufferSubData(id, off, sz, d);
-       else
-       {
-               glBindBuffer(GL_ARRAY_BUFFER, id);
-               glBufferSubData(GL_ARRAY_BUFFER, off, sz, d);
-               glBindBuffer(GL_ARRAY_BUFFER, 0);
-       }
+       BufferBackend::sub_data(off, sz, d);
 }
 
-void Buffer::require_size(unsigned req_sz) const
+void Buffer::require_size(size_t req_sz) const
 {
        if(size<req_sz)
                throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
 }
 
-void *Buffer::map()
-{
-       static Require _req(ARB_map_buffer_range);
-
-       allocate();
-       if(ARB_direct_state_access)
-               return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
-       else
-       {
-               glBindBuffer(GL_ARRAY_BUFFER, id);
-               void *result = glMapBufferRange(GL_ARRAY_BUFFER, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
-               glBindBuffer(GL_ARRAY_BUFFER, 0);
-               return result;
-       }
-}
-
-bool Buffer::unmap()
-{
-       // TODO check if it's mapped
-       if(ARB_direct_state_access)
-               return glUnmapNamedBuffer(id);
-       else if(OES_mapbuffer)
-       {
-               glBindBuffer(GL_ARRAY_BUFFER, id);
-               bool result = glUnmapBuffer(GL_ARRAY_BUFFER);
-               glBindBuffer(GL_ARRAY_BUFFER, 0);
-               return result;
-       }
-       else
-               return true;
-}
-
-void Buffer::set_debug_name(const string &name)
-{
-#ifdef DEBUG
-       if(KHR_debug)
-               glObjectLabel(GL_BUFFER, id, name.size(), name.c_str());
-#else
-       (void)name;
-#endif
-}
-
 } // namespace GL
 } // namespace Msp