/**
* Allocate a new renderbuffer to describe the user-provided color buffer.
*/
static struct gl_renderbuffer *
new_osmesa_renderbuffer(GLcontext *ctx, GLenum format, GLenum type)
{
const GLuint name = 0;
struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name);
if (rb) {
rb->RefCount = 1;
rb->Delete = osmesa_delete_renderbuffer;
rb->AllocStorage = osmesa_renderbuffer_storage;
if (format == OSMESA_COLOR_INDEX) {
rb->InternalFormat = GL_COLOR_INDEX;
rb->_ActualFormat = GL_COLOR_INDEX8_EXT;
rb->_BaseFormat = GL_COLOR_INDEX;
rb->DataType = GL_UNSIGNED_BYTE;
}
else {
rb->InternalFormat = GL_RGBA;
rb->_ActualFormat = GL_RGBA;
rb->_BaseFormat = GL_RGBA;
rb->DataType = type;
}
}
return rb;
}
/**
* Allocate a new renderbuffer to describe the user-provided color buffer.
*/
static struct gl_renderbuffer *
new_osmesa_renderbuffer(GLcontext *ctx, GLenum format, GLenum type)
{
const GLuint name = 0;
struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name);
if (rb) {
rb->RefCount = 1;
rb->Delete = osmesa_delete_renderbuffer;
rb->AllocStorage = osmesa_renderbuffer_storage;
rb->InternalFormat = GL_RGBA;
switch (type) {
case GL_UNSIGNED_BYTE:
rb->Format = MESA_FORMAT_RGBA8888;
break;
case GL_UNSIGNED_SHORT:
rb->Format = MESA_FORMAT_RGBA_16;
break;
case GL_FLOAT:
rb->Format = MESA_FORMAT_RGBA_FLOAT32;
break;
default:
assert(0 && "Unexpected type in new_osmesa_renderbuffer()");
rb->Format = MESA_FORMAT_RGBA8888;
}
rb->_BaseFormat = GL_RGBA;
rb->DataType = type;
}
return rb;
}
/**
* Wrap the given GL_DEPTH_STENCIL renderbuffer so that it acts like
* a depth renderbuffer.
* \return new depth renderbuffer
*/
struct gl_renderbuffer *
_mesa_new_z24_renderbuffer_wrapper(GLcontext *ctx,
struct gl_renderbuffer *dsrb)
{
struct gl_renderbuffer *z24rb;
ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
z24rb = _mesa_new_renderbuffer(ctx, 0);
if (!z24rb)
return NULL;
z24rb->Wrapped = dsrb;
z24rb->Name = dsrb->Name;
z24rb->RefCount = 1;
z24rb->Width = dsrb->Width;
z24rb->Height = dsrb->Height;
z24rb->InternalFormat = GL_DEPTH_COMPONENT24_ARB;
z24rb->_ActualFormat = GL_DEPTH_COMPONENT24_ARB;
z24rb->_BaseFormat = GL_DEPTH_COMPONENT;
z24rb->DataType = GL_UNSIGNED_INT;
z24rb->DepthBits = 24;
z24rb->Data = NULL;
z24rb->Delete = delete_wrapper;
z24rb->AllocStorage = alloc_wrapper_storage;
z24rb->GetPointer = nop_get_pointer;
z24rb->GetRow = get_row_z24;
z24rb->GetValues = get_values_z24;
z24rb->PutRow = put_row_z24;
z24rb->PutRowRGB = NULL;
z24rb->PutMonoRow = put_mono_row_z24;
z24rb->PutValues = put_values_z24;
z24rb->PutMonoValues = put_mono_values_z24;
return z24rb;
}
/**
* Wrap the given GL_DEPTH_STENCIL renderbuffer so that it acts like
* a stencil renderbuffer.
* \return new stencil renderbuffer
*/
struct gl_renderbuffer *
_mesa_new_s8_renderbuffer_wrapper(GLcontext *ctx, struct gl_renderbuffer *dsrb)
{
struct gl_renderbuffer *s8rb;
ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
s8rb = _mesa_new_renderbuffer(ctx, 0);
if (!s8rb)
return NULL;
s8rb->Wrapped = dsrb;
s8rb->Name = dsrb->Name;
s8rb->RefCount = 1;
s8rb->Width = dsrb->Width;
s8rb->Height = dsrb->Height;
s8rb->InternalFormat = GL_STENCIL_INDEX8_EXT;
s8rb->_ActualFormat = GL_STENCIL_INDEX8_EXT;
s8rb->_BaseFormat = GL_STENCIL_INDEX;
s8rb->DataType = GL_UNSIGNED_BYTE;
s8rb->StencilBits = 8;
s8rb->Data = NULL;
s8rb->Delete = delete_wrapper;
s8rb->AllocStorage = alloc_wrapper_storage;
s8rb->GetPointer = nop_get_pointer;
s8rb->GetRow = get_row_s8;
s8rb->GetValues = get_values_s8;
s8rb->PutRow = put_row_s8;
s8rb->PutRowRGB = NULL;
s8rb->PutMonoRow = put_mono_row_s8;
s8rb->PutValues = put_values_s8;
s8rb->PutMonoValues = put_mono_values_s8;
return s8rb;
}