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cogl-buffer: Track the last used bind target in CoglBuffer

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This makes CoglBuffer track the last used bind target as a private
property. This is later used when binding a buffer to map instead of
always using the PIXEL_UNPACK target.

This also adds some additional sanity checks that code doesn't try to
nest binds to the same target or bind a buffer to multiple targets at
the same time.
This commit is contained in:
Robert Bragg 2010-07-05 23:24:34 +01:00
parent 7571cc1923
commit e98ee6665b
7 changed files with 123 additions and 41 deletions
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23
cogl/cogl-buffer-private.h
View file

@ -75,11 +75,22 @@ typedef enum {
COGL_BUFFER_USAGE_HINT_VERTICES
} CoglBufferUsageHint;
typedef enum {
COGL_BUFFER_BIND_TARGET_PIXEL_PACK,
COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK,
COGL_BUFFER_BIND_TARGET_VERTEX_ARRAY,
COGL_BUFFER_BIND_TARGET_VERTEX_INDICES_ARRAY,
COGL_BUFFER_BIND_TARGET_COUNT
} CoglBufferBindTarget;
struct _CoglBuffer
{
CoglObject _parent;
const CoglBufferVtable *vtable;
CoglBufferBindTarget last_target;
CoglBufferFlags flags;
GLuint gl_handle; /* OpenGL handle */
@ -107,6 +118,7 @@ _cogl_buffer_register_buffer_type (GQuark type);
void
_cogl_buffer_initialize (CoglBuffer *buffer,
unsigned int size,
CoglBufferBindTarget default_target,
CoglBufferUsageHint usage_hint,
CoglBufferUpdateHint update_hint);
@ -115,11 +127,20 @@ _cogl_buffer_fini (CoglBuffer *buffer);
void
_cogl_buffer_bind (CoglBuffer *buffer,
GLenum target);
CoglBufferBindTarget target);
void
_cogl_buffer_unbind (CoglBuffer *buffer);
CoglBufferUsageHint
_cogl_buffer_get_usage_hint (CoglBuffer *buffer);
GLenum
_cogl_buffer_get_last_gl_target (CoglBuffer *buffer);
CoglBufferBindTarget
_cogl_buffer_get_last_bind_target (CoglBuffer *buffer);
GLenum
_cogl_buffer_access_to_gl_enum (CoglBufferAccess access);

90
cogl/cogl-buffer.c
View file

@ -59,9 +59,6 @@
#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
#define glMapBuffer ctx->drv.pf_glMapBuffer
#define glUnmapBuffer ctx->drv.pf_glUnmapBuffer
#ifndef GL_ARRAY_BUFFER
#define GL_ARRAY_BUFFER GL_ARRAY_BUFFER_ARB
#endif
#elif defined (HAVE_COGL_GLES2)
@ -69,6 +66,19 @@
#endif
#ifndef GL_PIXEL_PACK_BUFFER
#define GL_PIXEL_PACK_BUFFER 0x88EB
#endif
#ifndef GL_PIXEL_UNPACK_BUFFER
#define GL_PIXEL_UNPACK_BUFFER 0x88EC
#endif
#ifndef GL_ARRAY_BUFFER
#define GL_ARRAY_BUFFER 0x8892
#endif
#ifndef GL_ELEMENT_ARRAY_BUFFER
#define GL_ARRAY_BUFFER 0x8893
#endif
/* XXX:
* The CoglHandle macros don't support any form of inheritance, so for
* now we implement the CoglObject support for the CoglBuffer
@ -105,6 +115,7 @@ cogl_is_buffer (const void *object)
void
_cogl_buffer_initialize (CoglBuffer *buffer,
unsigned int size,
CoglBufferBindTarget default_target,
CoglBufferUsageHint usage_hint,
CoglBufferUpdateHint update_hint)
{
@ -112,6 +123,7 @@ _cogl_buffer_initialize (CoglBuffer *buffer,
buffer->flags = COGL_BUFFER_FLAG_NONE;
buffer->size = size;
buffer->last_target = default_target;
buffer->usage_hint = usage_hint;
buffer->update_hint = update_hint;
buffer->data = NULL;
@ -124,6 +136,30 @@ _cogl_buffer_fini (CoglBuffer *buffer)
cogl_buffer_unmap (buffer);
}
GLenum
_cogl_buffer_get_last_gl_target (CoglBuffer *buffer)
{
switch (buffer->last_target)
{
case COGL_BUFFER_BIND_TARGET_PIXEL_PACK:
return GL_PIXEL_PACK_BUFFER;
case COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK:
return GL_PIXEL_UNPACK_BUFFER;
case COGL_BUFFER_BIND_TARGET_VERTEX_ARRAY:
return GL_ARRAY_BUFFER;
case COGL_BUFFER_BIND_TARGET_VERTEX_INDICES_ARRAY:
return GL_ELEMENT_ARRAY_BUFFER;
default:
g_return_val_if_reached (COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK);
}
}
CoglBufferBindTarget
_cogl_buffer_get_last_bind_target (CoglBuffer *buffer)
{
return buffer->last_target;
}
/* OpenGL ES 1.1 and 2 have a GL_OES_mapbuffer extension that is able to map
* VBOs for write only, we don't support that in CoglBuffer */
#if defined (COGL_HAS_GLES)
@ -132,6 +168,7 @@ _cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
{
return 0;
}
#else
GLenum
_cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
@ -174,27 +211,46 @@ _cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
#endif
void
_cogl_buffer_bind (CoglBuffer *buffer,
GLenum target)
_cogl_buffer_bind (CoglBuffer *buffer, CoglBufferBindTarget target)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Don't bind again an already bound pbo */
if (ctx->current_pbo == buffer)
return;
g_return_if_fail (buffer != NULL);
if (buffer && COGL_BUFFER_FLAG_IS_SET (buffer, BUFFER_OBJECT))
/* Don't allow binding the buffer to multiple targets at the same time */
g_return_if_fail (ctx->current_buffer[buffer->last_target] != buffer);
/* Don't allow nesting binds to the same target */
g_return_if_fail (ctx->current_buffer[target] == NULL);
buffer->last_target = target;
if (COGL_BUFFER_FLAG_IS_SET (buffer, BUFFER_OBJECT))
{
GE( glBindBuffer (target, buffer->gl_handle) );
}
else if (buffer == NULL &&
ctx->current_pbo &&
COGL_BUFFER_FLAG_IS_SET (ctx->current_pbo, BUFFER_OBJECT))
{
GE( glBindBuffer (target, 0) );
GLenum gl_target = _cogl_buffer_get_last_gl_target (buffer);
GE( glBindBuffer (gl_target, buffer->gl_handle) );
}
ctx->current_pbo = buffer;
ctx->current_buffer[target] = buffer;
}
void
_cogl_buffer_unbind (CoglBuffer *buffer)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_return_if_fail (buffer != NULL);
/* the unbind should pair up with a previous bind */
g_return_if_fail (ctx->current_buffer[buffer->last_target] == buffer);
if (COGL_BUFFER_FLAG_IS_SET (buffer, BUFFER_OBJECT))
{
GLenum gl_target = _cogl_buffer_get_last_gl_target (buffer);
GE( glBindBuffer (gl_target, 0) );
}
ctx->current_buffer[buffer->last_target] = NULL;
}
unsigned int

6
cogl/cogl-context.c
View file

@ -57,6 +57,7 @@ cogl_create_context (void)
GLubyte default_texture_data[] = { 0xff, 0xff, 0xff, 0x0 };
unsigned long enable_flags = 0;
CoglHandle window_buffer;
int i;
if (_context != NULL)
return FALSE;
@ -148,6 +149,9 @@ cogl_create_context (void)
_context->legacy_depth_test_enabled = FALSE;
for (i = 0; i < COGL_BUFFER_BIND_TARGET_COUNT; i++)
_context->current_buffer[i] = NULL;
_context->framebuffer_stack = _cogl_create_framebuffer_stack ();
window_buffer = _cogl_onscreen_new ();
@ -204,8 +208,6 @@ cogl_create_context (void)
_context->atlas = NULL;
_context->atlas_texture = COGL_INVALID_HANDLE;
_context->current_pbo = NULL;
return TRUE;
}

4
cogl/cogl-context.h
View file

@ -118,9 +118,7 @@ typedef struct
gboolean legacy_depth_test_enabled;
/* PBOs */
/* This can be used to check if a pbo is bound */
CoglBuffer *current_pbo;
CoglBuffer *current_buffer[COGL_BUFFER_BIND_TARGET_COUNT];
/* Framebuffers */
GSList *framebuffer_stack;

1
cogl/cogl-pixel-array-private.h
View file

@ -58,7 +58,6 @@ struct _CoglPixelArray
CoglPixelArrayFlags flags;
GLenum gl_target;
CoglPixelFormat format;
unsigned int width;
unsigned int height;

35
cogl/cogl-pixel-array.c
View file

@ -98,6 +98,7 @@ _cogl_pixel_array_new (unsigned int size)
/* parent's constructor */
_cogl_buffer_initialize (buffer,
size,
COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK,
COGL_BUFFER_USAGE_HINT_TEXTURE,
COGL_BUFFER_UPDATE_HINT_STATIC);
@ -181,16 +182,16 @@ _cogl_pixel_array_map (CoglBuffer *buffer,
CoglBufferMapHint hints)
{
CoglPixelArray *pixel_array = COGL_PIXEL_ARRAY (buffer);
GLenum gl_target;
guint8 *data;
CoglBufferBindTarget target;
GLenum gl_target;
_COGL_GET_CONTEXT (ctx, NULL);
/* we determine the target lazily, on the first map */
gl_target = GL_PIXEL_UNPACK_BUFFER;
pixel_array->gl_target = gl_target;
target = _cogl_buffer_get_last_bind_target (buffer);
_cogl_buffer_bind (buffer, target);
_cogl_buffer_bind (buffer, gl_target);
gl_target = _cogl_buffer_get_last_gl_target (buffer);
/* create an empty store if we don't have one yet. creating the store
* lazily allows the user of the CoglBuffer to set a hint before the
@ -211,7 +212,7 @@ _cogl_pixel_array_map (CoglBuffer *buffer,
if (data)
COGL_BUFFER_SET_FLAG (buffer, MAPPED);
_cogl_buffer_bind (NULL, gl_target);
_cogl_buffer_unbind (buffer);
return data;
}
@ -219,16 +220,17 @@ _cogl_pixel_array_map (CoglBuffer *buffer,
static void
_cogl_pixel_array_unmap (CoglBuffer *buffer)
{
CoglPixelArray *pixel_array = COGL_PIXEL_ARRAY (buffer);
CoglBufferBindTarget target;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_buffer_bind (buffer, pixel_array->gl_target);
target = _cogl_buffer_get_last_bind_target (buffer);
_cogl_buffer_bind (buffer, target);
GE( glUnmapBuffer (pixel_array->gl_target) );
GE( glUnmapBuffer (_cogl_buffer_get_last_gl_target (buffer)) );
COGL_BUFFER_CLEAR_FLAG (buffer, MAPPED);
_cogl_buffer_bind (NULL, pixel_array->gl_target);
_cogl_buffer_unbind (buffer);
}
static gboolean
@ -238,19 +240,22 @@ _cogl_pixel_array_set_data (CoglBuffer *buffer,
unsigned int size)
{
CoglPixelArray *pixel_array = COGL_PIXEL_ARRAY (buffer);
CoglBufferBindTarget target;
GLenum gl_target;
_COGL_GET_CONTEXT (ctx, FALSE);
pixel_array->gl_target = GL_PIXEL_UNPACK_BUFFER;
target = _cogl_buffer_get_last_bind_target (buffer);
_cogl_buffer_bind (buffer, target);
_cogl_buffer_bind (buffer, pixel_array->gl_target);
gl_target = _cogl_buffer_get_last_gl_target (buffer);
/* create an empty store if we don't have one yet. creating the store
* lazily allows the user of the CoglBuffer to set a hint before the
* store is created. */
if (!COGL_PIXEL_ARRAY_FLAG_IS_SET (pixel_array, STORE_CREATED))
{
GE( glBufferData (pixel_array->gl_target,
GE( glBufferData (gl_target,
buffer->size,
NULL,
_cogl_buffer_hints_to_gl_enum (buffer->usage_hint,
@ -258,9 +263,9 @@ _cogl_pixel_array_set_data (CoglBuffer *buffer,
COGL_PIXEL_ARRAY_SET_FLAG (pixel_array, STORE_CREATED);
}
GE( glBufferSubData (pixel_array->gl_target, offset, size, data) );
GE( glBufferSubData (gl_target, offset, size, data) );
_cogl_buffer_bind (NULL, pixel_array->gl_target);
_cogl_buffer_unbind (buffer);
return TRUE;
}

5
cogl/cogl-texture.c
View file

@ -581,9 +581,10 @@ cogl_texture_new_from_buffer_EXP (CoglHandle buffer,
bitmap.format = format;
bitmap.rowstride = rowstride;
_cogl_buffer_bind (cogl_buffer, GL_PIXEL_UNPACK_BUFFER);
_cogl_buffer_bind (cogl_buffer,
COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK);
texture = cogl_texture_new_from_bitmap (&bitmap, flags, internal_format);
_cogl_buffer_bind (NULL, GL_PIXEL_UNPACK_BUFFER);
_cogl_buffer_unbind (cogl_buffer);
}
else
#endif