a9184d5cb7
This exposes 2 experimental functions that make it possible to upload a subregion of a texture from a CoglBuffer by first wrapping the buffer as a CoglBitmap and then allowing uploading of a subregion from a CoglBitmap. The new functions are: cogl_bitmap_new_from_buffer() and cogl_texture_set_region_from_bitmap() Actually for now we are exporting this API for practical reasons since we already had this API internally and it enables a specific feature that was requested, but it is worth nothing that it's quite likely we will replace these with functions that don't involve the CoglBitmap API at some point. For reference: The CoglBitmap API was actually removed from the 2.0 experimental API reference manual some time ago because the hope was that we'd come up with a neater replacement. It doesn't seem entirely clear what the scope of the CoglBitmap api is so it has became a bit of a dumping ground. CoglBitmap is used for image loading, as a means to represent the layout of image data and also internally deals with format conversions. Note: Because we are avoiding including CoglBitmap as part of the 2.0 API these functions aren't currently included in the 2.0 reference manual. Reviewed-by: Neil Roberts <neil@linux.intel.com>
474 lines
15 KiB
C
474 lines
15 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2009,2010 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*
|
|
* Authors:
|
|
* Neil Roberts <neil@linux.intel.com>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-util.h"
|
|
#include "cogl-texture-private.h"
|
|
#include "cogl-sub-texture-private.h"
|
|
#include "cogl-context-private.h"
|
|
#include "cogl-handle.h"
|
|
#include "cogl-texture-driver.h"
|
|
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
static void _cogl_sub_texture_free (CoglSubTexture *sub_tex);
|
|
|
|
COGL_TEXTURE_INTERNAL_DEFINE (SubTexture, sub_texture);
|
|
|
|
static const CoglTextureVtable cogl_sub_texture_vtable;
|
|
|
|
static void
|
|
_cogl_sub_texture_map_range (float *t1, float *t2,
|
|
int sub_offset,
|
|
int sub_size,
|
|
int full_size)
|
|
{
|
|
float t1_frac, t1_int, t2_frac, t2_int;
|
|
|
|
t1_frac = modff (*t1, &t1_int);
|
|
t2_frac = modff (*t2, &t2_int);
|
|
|
|
if (t1_frac < 0.0f)
|
|
{
|
|
t1_frac += 1.0f;
|
|
t1_int -= 1.0f;
|
|
}
|
|
if (t2_frac < 0.0f)
|
|
{
|
|
t2_frac += 1.0f;
|
|
t2_int -= 1.0f;
|
|
}
|
|
|
|
/* If one of the coordinates is zero we need to make sure it is
|
|
still greater than the other coordinate if it was originally so
|
|
we'll flip it to the other side */
|
|
if (*t1 < *t2)
|
|
{
|
|
if (t2_frac == 0.0f)
|
|
{
|
|
t2_frac = 1.0f;
|
|
t2_int -= 1.0f;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (t1_frac == 0.0f)
|
|
{
|
|
t1_frac = 1.0f;
|
|
t1_int -= 1.0f;
|
|
}
|
|
}
|
|
|
|
/* Convert the fractional part leaving the integer part intact */
|
|
t1_frac = (sub_offset + t1_frac * sub_size) / full_size;
|
|
*t1 = t1_frac + t1_int;
|
|
|
|
t2_frac = (sub_offset + t2_frac * sub_size) / full_size;
|
|
*t2 = t2_frac + t2_int;
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_map_quad (CoglSubTexture *sub_tex,
|
|
float *coords)
|
|
{
|
|
unsigned int full_width = cogl_texture_get_width (sub_tex->full_texture);
|
|
unsigned int full_height = cogl_texture_get_height (sub_tex->full_texture);
|
|
|
|
_cogl_sub_texture_map_range (coords + 0, coords + 2,
|
|
sub_tex->sub_x, sub_tex->sub_width,
|
|
full_width);
|
|
_cogl_sub_texture_map_range (coords + 1, coords + 3,
|
|
sub_tex->sub_y, sub_tex->sub_height,
|
|
full_height);
|
|
}
|
|
|
|
/* Maps from the texture coordinates of the full texture to the
|
|
texture coordinates of the sub texture */
|
|
static float
|
|
_cogl_sub_texture_unmap_coord (float t,
|
|
int sub_offset,
|
|
int sub_size,
|
|
int full_size)
|
|
{
|
|
float frac_part, int_part;
|
|
|
|
/* Convert the fractional part leaving the integer part in tact */
|
|
frac_part = modff (t, &int_part);
|
|
|
|
if (cogl_util_float_signbit (frac_part))
|
|
frac_part = ((1.0f + frac_part) * full_size -
|
|
sub_offset - sub_size) / sub_size;
|
|
else
|
|
frac_part = (frac_part * full_size - sub_offset) / sub_size;
|
|
|
|
return frac_part + int_part;
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_unmap_coords (CoglSubTexture *sub_tex,
|
|
float *s,
|
|
float *t)
|
|
{
|
|
unsigned int full_width = cogl_texture_get_width (sub_tex->full_texture);
|
|
unsigned int full_height = cogl_texture_get_height (sub_tex->full_texture);
|
|
|
|
*s = _cogl_sub_texture_unmap_coord (*s, sub_tex->sub_x, sub_tex->sub_width,
|
|
full_width);
|
|
*t = _cogl_sub_texture_unmap_coord (*t, sub_tex->sub_y, sub_tex->sub_height,
|
|
full_height);
|
|
}
|
|
|
|
typedef struct _CoglSubTextureForeachData
|
|
{
|
|
CoglSubTexture *sub_tex;
|
|
CoglTextureSliceCallback callback;
|
|
void *user_data;
|
|
} CoglSubTextureForeachData;
|
|
|
|
static void
|
|
_cogl_sub_texture_foreach_cb (CoglHandle handle,
|
|
const float *slice_coords,
|
|
const float *full_virtual_coords,
|
|
void *user_data)
|
|
{
|
|
CoglSubTextureForeachData *data = user_data;
|
|
float virtual_coords[4];
|
|
|
|
memcpy (virtual_coords, full_virtual_coords, sizeof (virtual_coords));
|
|
/* Convert the virtual coords from the full-texture space to the sub
|
|
texture space */
|
|
_cogl_sub_texture_unmap_coords (data->sub_tex,
|
|
&virtual_coords[0],
|
|
&virtual_coords[1]);
|
|
_cogl_sub_texture_unmap_coords (data->sub_tex,
|
|
&virtual_coords[2],
|
|
&virtual_coords[3]);
|
|
|
|
data->callback (handle,
|
|
slice_coords, virtual_coords,
|
|
data->user_data);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_manual_repeat_cb (const float *coords,
|
|
void *user_data)
|
|
{
|
|
CoglSubTextureForeachData *data = user_data;
|
|
float mapped_coords[4];
|
|
|
|
memcpy (mapped_coords, coords, sizeof (mapped_coords));
|
|
|
|
_cogl_sub_texture_map_quad (data->sub_tex, mapped_coords);
|
|
|
|
_cogl_texture_foreach_sub_texture_in_region (data->sub_tex->full_texture,
|
|
mapped_coords[0],
|
|
mapped_coords[1],
|
|
mapped_coords[2],
|
|
mapped_coords[3],
|
|
_cogl_sub_texture_foreach_cb,
|
|
user_data);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_foreach_sub_texture_in_region (
|
|
CoglTexture *tex,
|
|
float virtual_tx_1,
|
|
float virtual_ty_1,
|
|
float virtual_tx_2,
|
|
float virtual_ty_2,
|
|
CoglTextureSliceCallback callback,
|
|
void *user_data)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
CoglSubTextureForeachData data;
|
|
|
|
data.sub_tex = sub_tex;
|
|
data.callback = callback;
|
|
data.user_data = user_data;
|
|
|
|
_cogl_texture_iterate_manual_repeats (_cogl_sub_texture_manual_repeat_cb,
|
|
virtual_tx_1, virtual_ty_1,
|
|
virtual_tx_2, virtual_ty_2,
|
|
&data);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_set_wrap_mode_parameters (CoglTexture *tex,
|
|
GLenum wrap_mode_s,
|
|
GLenum wrap_mode_t,
|
|
GLenum wrap_mode_p)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
_cogl_texture_set_wrap_mode_parameters (sub_tex->full_texture,
|
|
wrap_mode_s,
|
|
wrap_mode_t,
|
|
wrap_mode_p);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_free (CoglSubTexture *sub_tex)
|
|
{
|
|
cogl_handle_unref (sub_tex->next_texture);
|
|
cogl_handle_unref (sub_tex->full_texture);
|
|
|
|
/* Chain up */
|
|
_cogl_texture_free (COGL_TEXTURE (sub_tex));
|
|
}
|
|
|
|
CoglHandle
|
|
_cogl_sub_texture_new (CoglHandle next_texture,
|
|
int sub_x, int sub_y,
|
|
int sub_width, int sub_height)
|
|
{
|
|
CoglHandle full_texture;
|
|
CoglSubTexture *sub_tex;
|
|
CoglTexture *tex;
|
|
unsigned int next_width, next_height;
|
|
|
|
next_width = cogl_texture_get_width (next_texture);
|
|
next_height = cogl_texture_get_height (next_texture);
|
|
|
|
/* The region must specify a non-zero subset of the full texture */
|
|
g_return_val_if_fail (sub_x >= 0 && sub_y >= 0, COGL_INVALID_HANDLE);
|
|
g_return_val_if_fail (sub_width > 0 && sub_height > 0, COGL_INVALID_HANDLE);
|
|
g_return_val_if_fail (sub_x + sub_width <= next_width, COGL_INVALID_HANDLE);
|
|
g_return_val_if_fail (sub_y + sub_height <= next_height, COGL_INVALID_HANDLE);
|
|
|
|
sub_tex = g_new (CoglSubTexture, 1);
|
|
|
|
tex = COGL_TEXTURE (sub_tex);
|
|
|
|
_cogl_texture_init (tex, &cogl_sub_texture_vtable);
|
|
|
|
/* If the next texture is also a sub texture we can avoid one level
|
|
of indirection by referencing the full texture of that texture
|
|
instead. */
|
|
if (_cogl_is_sub_texture (next_texture))
|
|
{
|
|
CoglSubTexture *other_sub_tex =
|
|
_cogl_sub_texture_pointer_from_handle (next_texture);
|
|
full_texture = other_sub_tex->full_texture;
|
|
sub_x += other_sub_tex->sub_x;
|
|
sub_y += other_sub_tex->sub_y;
|
|
}
|
|
else
|
|
full_texture = next_texture;
|
|
|
|
sub_tex->next_texture = cogl_handle_ref (next_texture);
|
|
sub_tex->full_texture = cogl_handle_ref (full_texture);
|
|
|
|
sub_tex->sub_x = sub_x;
|
|
sub_tex->sub_y = sub_y;
|
|
sub_tex->sub_width = sub_width;
|
|
sub_tex->sub_height = sub_height;
|
|
|
|
return _cogl_sub_texture_handle_new (sub_tex);
|
|
}
|
|
|
|
static int
|
|
_cogl_sub_texture_get_max_waste (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_get_max_waste (sub_tex->full_texture);
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_sub_texture_is_sliced (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_is_sliced (sub_tex->full_texture);
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_sub_texture_can_hardware_repeat (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
/* We can hardware repeat if the subtexture actually represents all of the
|
|
of the full texture */
|
|
return (sub_tex->sub_width ==
|
|
cogl_texture_get_width (sub_tex->full_texture) &&
|
|
sub_tex->sub_height ==
|
|
cogl_texture_get_height (sub_tex->full_texture) &&
|
|
_cogl_texture_can_hardware_repeat (sub_tex->full_texture));
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_transform_coords_to_gl (CoglTexture *tex,
|
|
float *s,
|
|
float *t)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
/* This won't work if the sub texture is not the size of the full
|
|
texture and the coordinates are outside the range [0,1] */
|
|
*s = ((*s * sub_tex->sub_width + sub_tex->sub_x) /
|
|
cogl_texture_get_width (sub_tex->full_texture));
|
|
*t = ((*t * sub_tex->sub_height + sub_tex->sub_y) /
|
|
cogl_texture_get_height (sub_tex->full_texture));
|
|
|
|
_cogl_texture_transform_coords_to_gl (sub_tex->full_texture, s, t);
|
|
}
|
|
|
|
static CoglTransformResult
|
|
_cogl_sub_texture_transform_quad_coords_to_gl (CoglTexture *tex,
|
|
float *coords)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
int i;
|
|
|
|
/* We can't support repeating with this method. In this case
|
|
cogl-primitives will resort to manual repeating */
|
|
for (i = 0; i < 4; i++)
|
|
if (coords[i] < 0.0f || coords[i] > 1.0f)
|
|
return COGL_TRANSFORM_SOFTWARE_REPEAT;
|
|
|
|
_cogl_sub_texture_map_quad (sub_tex, coords);
|
|
|
|
return _cogl_texture_transform_quad_coords_to_gl (sub_tex->full_texture,
|
|
coords);
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_sub_texture_get_gl_texture (CoglTexture *tex,
|
|
GLuint *out_gl_handle,
|
|
GLenum *out_gl_target)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_get_gl_texture (sub_tex->full_texture,
|
|
out_gl_handle,
|
|
out_gl_target);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_set_filters (CoglTexture *tex,
|
|
GLenum min_filter,
|
|
GLenum mag_filter)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
_cogl_texture_set_filters (sub_tex->full_texture, min_filter, mag_filter);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_pre_paint (CoglTexture *tex,
|
|
CoglTexturePrePaintFlags flags)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
_cogl_texture_pre_paint (sub_tex->full_texture, flags);
|
|
}
|
|
|
|
static void
|
|
_cogl_sub_texture_ensure_non_quad_rendering (CoglTexture *tex)
|
|
{
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_sub_texture_set_region (CoglTexture *tex,
|
|
int src_x,
|
|
int src_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int dst_width,
|
|
unsigned int dst_height,
|
|
CoglBitmap *bmp)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_set_region_from_bitmap (sub_tex->full_texture,
|
|
src_x, src_y,
|
|
dst_x + sub_tex->sub_x,
|
|
dst_y + sub_tex->sub_y,
|
|
dst_width, dst_height,
|
|
bmp);
|
|
}
|
|
|
|
static CoglPixelFormat
|
|
_cogl_sub_texture_get_format (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_get_format (sub_tex->full_texture);
|
|
}
|
|
|
|
static GLenum
|
|
_cogl_sub_texture_get_gl_format (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return _cogl_texture_get_gl_format (sub_tex->full_texture);
|
|
}
|
|
|
|
static int
|
|
_cogl_sub_texture_get_width (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return sub_tex->sub_width;
|
|
}
|
|
|
|
static int
|
|
_cogl_sub_texture_get_height (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return sub_tex->sub_height;
|
|
}
|
|
|
|
static const CoglTextureVtable
|
|
cogl_sub_texture_vtable =
|
|
{
|
|
_cogl_sub_texture_set_region,
|
|
NULL, /* get_data */
|
|
_cogl_sub_texture_foreach_sub_texture_in_region,
|
|
_cogl_sub_texture_get_max_waste,
|
|
_cogl_sub_texture_is_sliced,
|
|
_cogl_sub_texture_can_hardware_repeat,
|
|
_cogl_sub_texture_transform_coords_to_gl,
|
|
_cogl_sub_texture_transform_quad_coords_to_gl,
|
|
_cogl_sub_texture_get_gl_texture,
|
|
_cogl_sub_texture_set_filters,
|
|
_cogl_sub_texture_pre_paint,
|
|
_cogl_sub_texture_ensure_non_quad_rendering,
|
|
_cogl_sub_texture_set_wrap_mode_parameters,
|
|
_cogl_sub_texture_get_format,
|
|
_cogl_sub_texture_get_gl_format,
|
|
_cogl_sub_texture_get_width,
|
|
_cogl_sub_texture_get_height,
|
|
NULL /* is_foreign */
|
|
};
|