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mutter/cogl/cogl-texture-2d-sliced.c
Robert Bragg df21e20f65 Adds CoglError api 
Although we use GLib internally in Cogl we would rather not leak GLib
api through Cogl's own api, except through explicitly namespaced
cogl_glib_ / cogl_gtype_ feature apis.

One of the benefits we see to not leaking GLib through Cogl's public API
is that documentation for Cogl won't need to first introduce the Glib
API to newcomers, thus hopefully lowering the barrier to learning Cogl.

This patch provides a Cogl specific typedef for reporting runtime errors
which by no coincidence matches the typedef for GError exactly.  If Cogl
is built with --enable-glib (default) then developers can even safely
assume that a CoglError is a GError under the hood.

This patch also enforces a consistent policy for when NULL is passed as
an error argument and an error is thrown. In this case we log the error
and abort the application, instead of silently ignoring it. In common
cases where nothing has been implemented to handle a particular error
and/or where applications are just printing the error and aborting
themselves then this saves some typing. This also seems more consistent
with language based exceptions which usually cause a program to abort if
they are not explicitly caught (which passing a non-NULL error signifies
in this case)

Since this policy for NULL error pointers is stricter than the standard
GError convention, there is a clear note in the documentation to warn
developers that are used to using the GError api.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46)

Note: Since we can't change the Cogl 1.x api the patch was changed to
not rename _error_quark() functions to be _error_domain() functions and
although it's a bit ugly, instead of providing our own CoglError type
that's compatible with GError we simply #define CoglError to GError
unless Cogl is built with glib disabled.

Note: this patch does technically introduce an API break since it drops
the cogl_error_get_type() symbol generated by glib-mkenum (Since the
CoglError enum was replaced by a CoglSystemError enum) but for now we
are assuming that this will not affect anyone currently using the Cogl
API. If this does turn out to be a problem in practice then we would be
able to fix this my manually copying an implementation of
cogl_error_get_type() generated by glib-mkenum into a compatibility
source file and we could also define the original COGL_ERROR_ enums for
compatibility too.

Note: another minor concern with cherry-picking this patch to the 1.14
branch is that an api scanner would be lead to believe that some APIs
have changed, and for example the gobject-introspection parser which
understands the semantics of GError will not understand the semantics of
CoglError. We expect most people that have tried to use
gobject-introspection with Cogl already understand though that it is not
well suited to generating bindings of the Cogl api anyway and we aren't
aware or anyone depending on such bindings for apis involving GErrors.
(GnomeShell only makes very-very minimal use of Cogl via the gjs
bindings for the cogl_rectangle and cogl_color apis.)

The main reason we have cherry-picked this patch to the 1.14 branch
even given the above concerns is that without it it would become very
awkward for us to cherry-pick other beneficial patches from master.
2013-01-22 17:47:39 +00:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009,2010 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:
* Matthew Allum <mallum@openedhand.com>
* Neil Roberts <neil@linux.intel.com>
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-debug.h"
#include "cogl-private.h"
#include "cogl-util.h"
#include "cogl-bitmap.h"
#include "cogl-bitmap-private.h"
#include "cogl-texture-private.h"
#include "cogl-texture-2d-private.h"
#include "cogl-texture-2d-sliced-private.h"
#include "cogl-texture-driver.h"
#include "cogl-context-private.h"
#include "cogl-object-private.h"
#include "cogl-spans.h"
#include "cogl-journal-private.h"
#include "cogl-pipeline-opengl-private.h"
#include "cogl-primitive-texture.h"
#include "cogl-error-private.h"
#include <string.h>
#include <stdlib.h>
#include <math.h>
static void _cogl_texture_2d_sliced_free (CoglTexture2DSliced *tex_2ds);
COGL_TEXTURE_DEFINE (Texture2DSliced, texture_2d_sliced);
static const CoglTextureVtable cogl_texture_2d_sliced_vtable;
typedef struct _ForeachData
{
CoglMetaTextureCallback callback;
void *user_data;
float x_normalize_factor;
float y_normalize_factor;
} ForeachData;
static void
re_normalize_sub_texture_coords_cb (CoglTexture *sub_texture,
const float *sub_texture_coords,
const float *meta_coords,
void *user_data)
{
ForeachData *data = user_data;
float re_normalized_coords[4] =
{
sub_texture_coords[0] * data->x_normalize_factor,
sub_texture_coords[1] * data->y_normalize_factor,
sub_texture_coords[2] * data->x_normalize_factor,
sub_texture_coords[3] * data->y_normalize_factor
};
data->callback (sub_texture, re_normalized_coords, meta_coords,
data->user_data);
}
static void
_cogl_texture_2d_sliced_foreach_sub_texture_in_region (
CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglMetaTextureCallback callback,
void *user_data)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglSpan *x_spans = (CoglSpan *)tex_2ds->slice_x_spans->data;
CoglSpan *y_spans = (CoglSpan *)tex_2ds->slice_y_spans->data;
CoglTexture **textures = (CoglTexture **)tex_2ds->slice_textures->data;
float un_normalized_coords[4];
ForeachData data;
/* NB: its convenient for us to store non-normalized coordinates in
* our CoglSpans but that means we need to un-normalize the incoming
* virtual coordinates and make sure we re-normalize the coordinates
* before calling the given callback.
*/
data.callback = callback;
data.user_data = user_data;
data.x_normalize_factor = 1.0f / tex_2ds->width;
data.y_normalize_factor = 1.0f / tex_2ds->height;
un_normalized_coords[0] = virtual_tx_1 * data.x_normalize_factor;
un_normalized_coords[1] = virtual_ty_1 * data.y_normalize_factor;
un_normalized_coords[2] = virtual_tx_2 * data.x_normalize_factor;
un_normalized_coords[3] = virtual_ty_2 * data.y_normalize_factor;
_cogl_texture_spans_foreach_in_region (x_spans,
tex_2ds->slice_x_spans->len,
y_spans,
tex_2ds->slice_y_spans->len,
textures,
un_normalized_coords,
1, /* x_normalize_factor */
1, /* y_normalize_factor */
COGL_PIPELINE_WRAP_MODE_REPEAT,
COGL_PIPELINE_WRAP_MODE_REPEAT,
re_normalize_sub_texture_coords_cb,
&data);
}
static uint8_t *
_cogl_texture_2d_sliced_allocate_waste_buffer (CoglTexture2DSliced *tex_2ds,
CoglPixelFormat format)
{
CoglSpan *last_x_span;
CoglSpan *last_y_span;
uint8_t *waste_buf = NULL;
/* If the texture has any waste then allocate a buffer big enough to
fill the gaps */
last_x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan,
tex_2ds->slice_x_spans->len - 1);
last_y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan,
tex_2ds->slice_y_spans->len - 1);
if (last_x_span->waste > 0 || last_y_span->waste > 0)
{
int bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
CoglSpan *first_x_span
= &g_array_index (tex_2ds->slice_x_spans, CoglSpan, 0);
CoglSpan *first_y_span
= &g_array_index (tex_2ds->slice_y_spans, CoglSpan, 0);
unsigned int right_size = first_y_span->size * last_x_span->waste;
unsigned int bottom_size = first_x_span->size * last_y_span->waste;
waste_buf = g_malloc (MAX (right_size, bottom_size) * bpp);
}
return waste_buf;
}
static void
_cogl_texture_2d_sliced_set_waste (CoglTexture2DSliced *tex_2ds,
CoglBitmap *source_bmp,
CoglTexture2D *slice_tex,
uint8_t *waste_buf,
CoglSpan *x_span,
CoglSpan *y_span,
CoglSpanIter *x_iter,
CoglSpanIter *y_iter,
int src_x,
int src_y,
int dst_x,
int dst_y)
{
CoglBool need_x, need_y;
CoglContext *ctx = COGL_TEXTURE (tex_2ds)->context;
/* If the x_span is sliced and the upload touches the
rightmost pixels then fill the waste with copies of the
pixels */
need_x = x_span->waste > 0 &&
x_iter->intersect_end - x_iter->pos >= x_span->size - x_span->waste;
/* same for the bottom-most pixels */
need_y = y_span->waste > 0 &&
y_iter->intersect_end - y_iter->pos >= y_span->size - y_span->waste;
if (need_x || need_y)
{
int bmp_rowstride = cogl_bitmap_get_rowstride (source_bmp);
CoglPixelFormat source_format = cogl_bitmap_get_format (source_bmp);
int bpp = _cogl_pixel_format_get_bytes_per_pixel (source_format);
uint8_t *bmp_data;
const uint8_t *src;
uint8_t *dst;
unsigned int wy, wx;
CoglBitmap *waste_bmp;
bmp_data = _cogl_bitmap_map (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
if (bmp_data == NULL)
return;
if (need_x)
{
src = (bmp_data + ((src_y + (int) y_iter->intersect_start - dst_y) *
bmp_rowstride) +
(src_x + (int)x_span->start + (int)x_span->size -
(int)x_span->waste - dst_x - 1) * bpp);
dst = waste_buf;
for (wy = 0;
wy < y_iter->intersect_end - y_iter->intersect_start;
wy++)
{
for (wx = 0; wx < x_span->waste; wx++)
{
memcpy (dst, src, bpp);
dst += bpp;
}
src += bmp_rowstride;
}
waste_bmp = cogl_bitmap_new_for_data (ctx,
x_span->waste,
y_iter->intersect_end -
y_iter->intersect_start,
source_format,
x_span->waste * bpp,
waste_buf);
cogl_texture_set_region_from_bitmap (COGL_TEXTURE (slice_tex),
0, /* src_x */
0, /* src_y */
/* dst_x */
x_span->size - x_span->waste,
y_iter->intersect_start -
y_span->start, /* dst_y */
x_span->waste, /* dst_width */
/* dst_height */
y_iter->intersect_end -
y_iter->intersect_start,
waste_bmp);
cogl_object_unref (waste_bmp);
}
if (need_y)
{
unsigned int copy_width, intersect_width;
src = (bmp_data + ((src_x + (int) x_iter->intersect_start - dst_x) *
bpp) +
(src_y + (int)y_span->start + (int)y_span->size -
(int)y_span->waste - dst_y - 1) * bmp_rowstride);
dst = waste_buf;
if (x_iter->intersect_end - x_iter->pos
>= x_span->size - x_span->waste)
copy_width = x_span->size + x_iter->pos - x_iter->intersect_start;
else
copy_width = x_iter->intersect_end - x_iter->intersect_start;
intersect_width = x_iter->intersect_end - x_iter->intersect_start;
for (wy = 0; wy < y_span->waste; wy++)
{
memcpy (dst, src, intersect_width * bpp);
dst += intersect_width * bpp;
for (wx = intersect_width; wx < copy_width; wx++)
{
memcpy (dst, dst - bpp, bpp);
dst += bpp;
}
}
waste_bmp = cogl_bitmap_new_for_data (ctx,
copy_width,
y_span->waste,
source_format,
copy_width * bpp,
waste_buf);
cogl_texture_set_region_from_bitmap (COGL_TEXTURE (slice_tex),
0, /* src_x */
0, /* src_y */
/* dst_x */
x_iter->intersect_start -
x_iter->pos,
/* dst_y */
y_span->size - y_span->waste,
copy_width, /* dst_width */
y_span->waste, /* dst_height */
waste_bmp);
cogl_object_unref (waste_bmp);
}
_cogl_bitmap_unmap (source_bmp);
}
}
static CoglBool
_cogl_texture_2d_sliced_upload_to_gl (CoglTexture2DSliced *tex_2ds,
CoglBitmap *bmp)
{
CoglSpan *x_span;
CoglSpan *y_span;
CoglTexture2D *slice_tex;
int x, y;
uint8_t *waste_buf;
CoglPixelFormat bmp_format;
bmp_format = cogl_bitmap_get_format (bmp);
waste_buf = _cogl_texture_2d_sliced_allocate_waste_buffer (tex_2ds,
bmp_format);
/* Iterate vertical slices */
for (y = 0; y < tex_2ds->slice_y_spans->len; ++y)
{
y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan, y);
/* Iterate horizontal slices */
for (x = 0; x < tex_2ds->slice_x_spans->len; ++x)
{
int slice_num = y * tex_2ds->slice_x_spans->len + x;
CoglSpanIter x_iter, y_iter;
x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan, x);
/* Pick the gl texture object handle */
slice_tex = g_array_index (tex_2ds->slice_textures,
CoglTexture2D *, slice_num);
cogl_texture_set_region_from_bitmap (COGL_TEXTURE (slice_tex),
x_span->start, /* src x */
y_span->start, /* src y */
0, /* dst x */
0, /* dst y */
x_span->size -
x_span->waste, /* width */
y_span->size -
y_span->waste, /* height */
bmp);
/* Set up a fake iterator that covers the whole slice */
x_iter.intersect_start = x_span->start;
x_iter.intersect_end = (x_span->start +
x_span->size -
x_span->waste);
x_iter.pos = x_span->start;
y_iter.intersect_start = y_span->start;
y_iter.intersect_end = (y_span->start +
y_span->size -
y_span->waste);
y_iter.pos = y_span->start;
_cogl_texture_2d_sliced_set_waste (tex_2ds,
bmp,
slice_tex,
waste_buf,
x_span, y_span,
&x_iter, &y_iter,
0, /* src_x */
0, /* src_y */
0, /* dst_x */
0); /* dst_y */
}
}
if (waste_buf)
g_free (waste_buf);
return TRUE;
}
static CoglBool
_cogl_texture_2d_sliced_upload_subregion_to_gl (CoglTexture2DSliced *tex_2ds,
int src_x,
int src_y,
int dst_x,
int dst_y,
int width,
int height,
CoglBitmap *source_bmp,
GLuint source_gl_format,
GLuint source_gl_type)
{
CoglSpan *x_span;
CoglSpan *y_span;
CoglSpanIter x_iter;
CoglSpanIter y_iter;
CoglTexture2D *slice_tex;
int source_x = 0, source_y = 0;
int inter_w = 0, inter_h = 0;
int local_x = 0, local_y = 0;
uint8_t *waste_buf;
CoglPixelFormat source_format;
source_format = cogl_bitmap_get_format (source_bmp);
waste_buf =
_cogl_texture_2d_sliced_allocate_waste_buffer (tex_2ds, source_format);
/* Iterate vertical spans */
for (source_y = src_y,
_cogl_span_iter_begin (&y_iter,
(CoglSpan *)tex_2ds->slice_y_spans->data,
tex_2ds->slice_y_spans->len,
tex_2ds->height,
dst_y,
dst_y + height,
COGL_PIPELINE_WRAP_MODE_REPEAT);
!_cogl_span_iter_end (&y_iter);
_cogl_span_iter_next (&y_iter),
source_y += inter_h )
{
y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan,
y_iter.index);
/* Iterate horizontal spans */
for (source_x = src_x,
_cogl_span_iter_begin (&x_iter,
(CoglSpan *)tex_2ds->slice_x_spans->data,
tex_2ds->slice_x_spans->len,
tex_2ds->width,
dst_x,
dst_x + width,
COGL_PIPELINE_WRAP_MODE_REPEAT);
!_cogl_span_iter_end (&x_iter);
_cogl_span_iter_next (&x_iter),
source_x += inter_w )
{
int slice_num;
x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan,
x_iter.index);
/* Pick intersection width and height */
inter_w = (x_iter.intersect_end - x_iter.intersect_start);
inter_h = (y_iter.intersect_end - y_iter.intersect_start);
/* Localize intersection top-left corner to slice*/
local_x = (x_iter.intersect_start - x_iter.pos);
local_y = (y_iter.intersect_start - y_iter.pos);
slice_num = y_iter.index * tex_2ds->slice_x_spans->len + x_iter.index;
/* Pick slice texture */
slice_tex = g_array_index (tex_2ds->slice_textures,
CoglTexture2D *, slice_num);
cogl_texture_set_region_from_bitmap (COGL_TEXTURE (slice_tex),
source_x,
source_y,
local_x, /* dst x */
local_y, /* dst y */
inter_w, /* width */
inter_h, /* height */
source_bmp);
_cogl_texture_2d_sliced_set_waste (tex_2ds,
source_bmp,
slice_tex,
waste_buf,
x_span, y_span,
&x_iter, &y_iter,
src_x, src_y,
dst_x, dst_y);
}
}
g_free (waste_buf);
return TRUE;
}
static int
_cogl_rect_slices_for_size (int size_to_fill,
int max_span_size,
int max_waste,
GArray *out_spans)
{
int n_spans = 0;
CoglSpan span;
/* Init first slice span */
span.start = 0;
span.size = max_span_size;
span.waste = 0;
/* Repeat until whole area covered */
while (size_to_fill >= span.size)
{
/* Add another slice span of same size */
if (out_spans)
g_array_append_val (out_spans, span);
span.start += span.size;
size_to_fill -= span.size;
n_spans++;
}
/* Add one last smaller slice span */
if (size_to_fill > 0)
{
span.size = size_to_fill;
if (out_spans)
g_array_append_val (out_spans, span);
n_spans++;
}
return n_spans;
}
static int
_cogl_pot_slices_for_size (int size_to_fill,
int max_span_size,
int max_waste,
GArray *out_spans)
{
int n_spans = 0;
CoglSpan span;
/* Init first slice span */
span.start = 0;
span.size = max_span_size;
span.waste = 0;
/* Fix invalid max_waste */
if (max_waste < 0)
max_waste = 0;
while (TRUE)
{
/* Is the whole area covered? */
if (size_to_fill > span.size)
{
/* Not yet - add a span of this size */
if (out_spans)
g_array_append_val (out_spans, span);
span.start += span.size;
size_to_fill -= span.size;
n_spans++;
}
else if (span.size - size_to_fill <= max_waste)
{
/* Yes and waste is small enough */
/* Pick the next power of two up from size_to_fill. This can
sometimes be less than the span.size that would be chosen
otherwise */
span.size = _cogl_util_next_p2 (size_to_fill);
span.waste = span.size - size_to_fill;
if (out_spans)
g_array_append_val (out_spans, span);
return ++n_spans;
}
else
{
/* Yes but waste is too large */
while (span.size - size_to_fill > max_waste)
{
span.size /= 2;
g_assert (span.size > 0);
}
}
}
/* Can't get here */
return 0;
}
static void
_cogl_texture_2d_sliced_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
int i;
/* Pass the set wrap mode on to all of the child textures */
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
CoglTexture2D *slice_tex = g_array_index (tex_2ds->slice_textures,
CoglTexture2D *,
i);
_cogl_texture_set_wrap_mode_parameters (COGL_TEXTURE (slice_tex),
wrap_mode_s,
wrap_mode_t,
wrap_mode_p);
}
}
static CoglBool
_cogl_texture_2d_sliced_slices_create (CoglContext *ctx,
CoglTexture2DSliced *tex_2ds,
int width, int height,
CoglPixelFormat format)
{
int max_width;
int max_height;
CoglTexture2D **slice_textures;
int n_x_slices;
int n_y_slices;
int n_slices;
int x, y;
CoglSpan *x_span;
CoglSpan *y_span;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
int (*slices_for_size) (int, int, int, GArray*);
/* Initialize size of largest slice according to supported features */
if (cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_NPOT))
{
max_width = width;
max_height = height;
slices_for_size = _cogl_rect_slices_for_size;
}
else
{
max_width = _cogl_util_next_p2 (width);
max_height = _cogl_util_next_p2 (height);
slices_for_size = _cogl_pot_slices_for_size;
}
ctx->driver_vtable->pixel_format_to_gl (ctx,
format,
&gl_intformat,
&gl_format,
&gl_type);
/* Negative number means no slicing forced by the user */
if (tex_2ds->max_waste <= -1)
{
CoglSpan span;
/* Check if size supported else bail out */
if (!ctx->texture_driver->size_supported (ctx,
GL_TEXTURE_2D,
gl_intformat,
gl_format,
gl_type,
max_width,
max_height))
{
return FALSE;
}
n_x_slices = 1;
n_y_slices = 1;
/* Init span arrays */
tex_2ds->slice_x_spans = g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan),
1);
tex_2ds->slice_y_spans = g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan),
1);
/* Add a single span for width and height */
span.start = 0;
span.size = max_width;
span.waste = max_width - width;
g_array_append_val (tex_2ds->slice_x_spans, span);
span.size = max_height;
span.waste = max_height - height;
g_array_append_val (tex_2ds->slice_y_spans, span);
}
else
{
/* Decrease the size of largest slice until supported by GL */
while (!ctx->texture_driver->size_supported (ctx,
GL_TEXTURE_2D,
gl_intformat,
gl_format,
gl_type,
max_width,
max_height))
{
/* Alternate between width and height */
if (max_width > max_height)
max_width /= 2;
else
max_height /= 2;
if (max_width == 0 || max_height == 0)
return FALSE;
}
/* Determine the slices required to cover the bitmap area */
n_x_slices = slices_for_size (width,
max_width, tex_2ds->max_waste,
NULL);
n_y_slices = slices_for_size (height,
max_height, tex_2ds->max_waste,
NULL);
/* Init span arrays with reserved size */
tex_2ds->slice_x_spans = g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan),
n_x_slices);
tex_2ds->slice_y_spans = g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan),
n_y_slices);
/* Fill span arrays with info */
slices_for_size (width,
max_width, tex_2ds->max_waste,
tex_2ds->slice_x_spans);
slices_for_size (height,
max_height, tex_2ds->max_waste,
tex_2ds->slice_y_spans);
}
/* Init and resize GL handle array */
n_slices = n_x_slices * n_y_slices;
tex_2ds->slice_textures = g_array_sized_new (FALSE, FALSE,
sizeof (CoglTexture2D *),
n_slices);
g_array_set_size (tex_2ds->slice_textures, n_slices);
slice_textures = (CoglTexture2D **) tex_2ds->slice_textures->data;
/* Init each GL texture object */
for (y = 0; y < n_y_slices; ++y)
{
y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan, y);
for (x = 0; x < n_x_slices; ++x)
{
CoglError *error = NULL;
x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan, x);
COGL_NOTE (SLICING, "CREATE SLICE (%d,%d)\tsize (%d,%d)",
x, y,
(int)(x_span->size - x_span->waste),
(int)(y_span->size - y_span->waste));
slice_textures[y * n_x_slices + x] =
cogl_texture_2d_new_with_size (ctx, x_span->size, y_span->size,
format, &error);
if (!slice_textures[y * n_x_slices + x])
{
g_array_set_size (tex_2ds->slice_textures, y * n_x_slices + x);
cogl_error_free (error);
return FALSE;
}
}
}
return TRUE;
}
static void
_cogl_texture_2d_sliced_slices_free (CoglTexture2DSliced *tex_2ds)
{
if (tex_2ds->slice_x_spans != NULL)
g_array_free (tex_2ds->slice_x_spans, TRUE);
if (tex_2ds->slice_y_spans != NULL)
g_array_free (tex_2ds->slice_y_spans, TRUE);
if (tex_2ds->slice_textures != NULL)
{
int i;
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
CoglTexture2D *slice_tex =
g_array_index (tex_2ds->slice_textures, CoglTexture2D *, i);
cogl_object_unref (slice_tex);
}
g_array_free (tex_2ds->slice_textures, TRUE);
}
}
static void
_cogl_texture_2d_sliced_free (CoglTexture2DSliced *tex_2ds)
{
_cogl_texture_2d_sliced_slices_free (tex_2ds);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_2ds));
}
static CoglBool
_cogl_texture_2d_sliced_init_base (CoglContext *ctx,
CoglTexture2DSliced *tex_2ds,
int width,
int height,
CoglPixelFormat internal_format)
{
CoglTexture *tex = COGL_TEXTURE (tex_2ds);
_cogl_texture_init (tex, ctx, &cogl_texture_2d_sliced_vtable);
tex_2ds->slice_x_spans = NULL;
tex_2ds->slice_y_spans = NULL;
tex_2ds->slice_textures = NULL;
/* Create slices for the given format and size */
if (!_cogl_texture_2d_sliced_slices_create (ctx,
tex_2ds,
width,
height,
internal_format))
return FALSE;
tex_2ds->width = width;
tex_2ds->height = height;
return TRUE;
}
CoglTexture2DSliced *
cogl_texture_2d_sliced_new_with_size (CoglContext *ctx,
unsigned int width,
unsigned int height,
int max_waste,
CoglPixelFormat internal_format,
CoglError **error)
{
CoglTexture2DSliced *tex_2ds;
/* Since no data, we need some internal format */
if (internal_format == COGL_PIXEL_FORMAT_ANY)
internal_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
/* Init texture with empty bitmap */
tex_2ds = g_new (CoglTexture2DSliced, 1);
tex_2ds->max_waste = max_waste;
if (!_cogl_texture_2d_sliced_init_base (ctx,
tex_2ds,
width, height,
internal_format))
{
_cogl_texture_2d_sliced_free (tex_2ds);
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_NO_MEMORY,
"Not enough memory to allocate texture slices");
return NULL;
}
return _cogl_texture_2d_sliced_object_new (tex_2ds);
}
CoglTexture2DSliced *
_cogl_texture_2d_sliced_new_from_bitmap (CoglBitmap *bmp,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTexture2DSliced *tex_2ds;
CoglBitmap *dst_bmp;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
int width, height;
CoglContext *ctx;
int i;
_COGL_RETURN_VAL_IF_FAIL (cogl_is_bitmap (bmp), NULL);
ctx = _cogl_bitmap_get_context (bmp);
width = cogl_bitmap_get_width (bmp);
height = cogl_bitmap_get_height (bmp);
/* Create new texture and fill with loaded data */
tex_2ds = g_new0 (CoglTexture2DSliced, 1);
if (flags & COGL_TEXTURE_NO_SLICING)
tex_2ds->max_waste = -1;
else
tex_2ds->max_waste = COGL_TEXTURE_MAX_WASTE;
dst_bmp = _cogl_texture_prepare_for_upload (bmp,
internal_format,
&internal_format,
&gl_intformat,
&gl_format,
&gl_type);
if (dst_bmp == NULL)
{
_cogl_texture_2d_sliced_free (tex_2ds);
return NULL;
}
if (!_cogl_texture_2d_sliced_init_base (ctx,
tex_2ds,
width, height,
internal_format))
goto error;
if (!_cogl_texture_2d_sliced_upload_to_gl (tex_2ds,
dst_bmp))
goto error;
cogl_object_unref (dst_bmp);
if ((flags & COGL_TEXTURE_NO_AUTO_MIPMAP))
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
CoglPrimitiveTexture *slice_tex;
slice_tex = g_array_index (tex_2ds->slice_textures,
CoglPrimitiveTexture *,
i);
cogl_primitive_texture_set_auto_mipmap (slice_tex, FALSE);
}
return _cogl_texture_2d_sliced_object_new (tex_2ds);
error:
cogl_object_unref (dst_bmp);
_cogl_texture_2d_sliced_free (tex_2ds);
return NULL;
}
CoglTexture2DSliced *
_cogl_texture_2d_sliced_new_from_foreign (GLuint gl_handle,
GLenum gl_target,
GLuint width,
GLuint height,
GLuint x_pot_waste,
GLuint y_pot_waste,
CoglPixelFormat format)
{
/* NOTE: width, height and internal format are not queriable
* in GLES, hence such a function prototype.
*/
GLint gl_width = 0;
GLint gl_height = 0;
CoglTexture2DSliced *tex_2ds;
CoglTexture *tex;
CoglSpan x_span;
CoglSpan y_span;
CoglTexture2D *tex_2d;
_COGL_GET_CONTEXT (ctx, NULL);
/* This should only be called when the texture target is 2D. If a
rectangle texture is used then _cogl_texture_new_from_foreign
will create a cogl_texture_rectangle instead */
g_assert (gl_target == GL_TEXTURE_2D);
gl_width = width + x_pot_waste;
gl_height = height + y_pot_waste;
/* Validate pot waste */
if (x_pot_waste < 0 || x_pot_waste >= width ||
y_pot_waste < 0 || y_pot_waste >= height)
return NULL;
tex_2d = cogl_texture_2d_new_from_foreign (ctx,
gl_target,
gl_width,
gl_height,
format,
NULL);
if (!tex_2d)
return NULL;
/* The texture 2d backend may use a different pixel format if it
queries the actual texture so we'll refetch the format it
actually used */
format = cogl_texture_get_format (COGL_TEXTURE (tex_2d));
/* Create new texture */
tex_2ds = g_new0 (CoglTexture2DSliced, 1);
tex = COGL_TEXTURE (tex_2ds);
tex->vtable = &cogl_texture_2d_sliced_vtable;
tex_2ds->width = gl_width - x_pot_waste;
tex_2ds->height = gl_height - y_pot_waste;
tex_2ds->max_waste = 0;
/* Create slice arrays */
tex_2ds->slice_x_spans =
g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan), 1);
tex_2ds->slice_y_spans =
g_array_sized_new (FALSE, FALSE,
sizeof (CoglSpan), 1);
tex_2ds->slice_textures =
g_array_sized_new (FALSE, FALSE,
sizeof (CoglTexture2D *), 1);
/* Store info for a single slice */
x_span.start = 0;
x_span.size = gl_width;
x_span.waste = x_pot_waste;
g_array_append_val (tex_2ds->slice_x_spans, x_span);
y_span.start = 0;
y_span.size = gl_height;
y_span.waste = y_pot_waste;
g_array_append_val (tex_2ds->slice_y_spans, y_span);
g_array_append_val (tex_2ds->slice_textures, tex_2d);
return _cogl_texture_2d_sliced_object_new (tex_2ds);
}
static CoglBool
_cogl_texture_2d_sliced_is_foreign (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return FALSE;
/* Pass the call on to the first slice */
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
return _cogl_texture_is_foreign (COGL_TEXTURE (slice_tex));
}
static int
_cogl_texture_2d_sliced_get_max_waste (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
return tex_2ds->max_waste;
}
static CoglBool
_cogl_texture_2d_sliced_is_sliced (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
if (tex_2ds->slice_textures == NULL)
return FALSE;
if (tex_2ds->slice_textures->len <= 1)
return FALSE;
return TRUE;
}
static CoglBool
_cogl_texture_2d_sliced_can_hardware_repeat (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
CoglSpan *x_span;
CoglSpan *y_span;
/* If there's more than one texture then we can't hardware repeat */
if (tex_2ds->slice_textures->len != 1)
return FALSE;
/* If there's any waste then we can't hardware repeat */
x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan, 0);
y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan, 0);
if (x_span->waste > 0 || y_span->waste > 0)
return FALSE;
/* Otherwise pass the query on to the single slice texture */
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
return _cogl_texture_can_hardware_repeat (COGL_TEXTURE (slice_tex));
}
static void
_cogl_texture_2d_sliced_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglSpan *x_span;
CoglSpan *y_span;
CoglTexture2D *slice_tex;
g_assert (!_cogl_texture_2d_sliced_is_sliced (tex));
/* Don't include the waste in the texture coordinates */
x_span = &g_array_index (tex_2ds->slice_x_spans, CoglSpan, 0);
y_span = &g_array_index (tex_2ds->slice_y_spans, CoglSpan, 0);
*s *= tex_2ds->width / (float)x_span->size;
*t *= tex_2ds->height / (float)y_span->size;
/* Let the child texture further transform the coords */
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
_cogl_texture_transform_coords_to_gl (COGL_TEXTURE (slice_tex), s, t);
}
static CoglTransformResult
_cogl_texture_2d_sliced_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
CoglBool need_repeat = FALSE;
int i;
/* This is a bit lazy - in the case where the quad lies entirely
* within a single slice we could avoid the fallback. But that
* could likely lead to visual inconsistency if the fallback involves
* dropping layers, so this might be the right thing to do anyways.
*/
if (_cogl_texture_2d_sliced_is_sliced (tex))
return COGL_TRANSFORM_SOFTWARE_REPEAT;
for (i = 0; i < 4; i++)
if (coords[i] < 0.0f || coords[i] > 1.0f)
need_repeat = TRUE;
if (need_repeat && !_cogl_texture_2d_sliced_can_hardware_repeat (tex))
return COGL_TRANSFORM_SOFTWARE_REPEAT;
_cogl_texture_2d_sliced_transform_coords_to_gl (tex, coords + 0, coords + 1);
_cogl_texture_2d_sliced_transform_coords_to_gl (tex, coords + 2, coords + 3);
return (need_repeat
? COGL_TRANSFORM_HARDWARE_REPEAT : COGL_TRANSFORM_NO_REPEAT);
}
static CoglBool
_cogl_texture_2d_sliced_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
if (tex_2ds->slice_textures == NULL)
return FALSE;
if (tex_2ds->slice_textures->len < 1)
return FALSE;
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
return cogl_texture_get_gl_texture (COGL_TEXTURE (slice_tex),
out_gl_handle, out_gl_target);
}
static void
_cogl_texture_2d_sliced_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
int i;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return;
/* Apply new filters to every slice. The slice texture itself should
cache the value and avoid resubmitting the same filter value to
GL */
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, i);
_cogl_texture_set_filters (COGL_TEXTURE (slice_tex),
min_filter, mag_filter);
}
}
static void
_cogl_texture_2d_sliced_pre_paint (CoglTexture *tex,
CoglTexturePrePaintFlags flags)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
int i;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return;
/* Pass the pre-paint on to every slice */
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
CoglTexture2D *slice_tex = g_array_index (tex_2ds->slice_textures,
CoglTexture2D *, i);
_cogl_texture_pre_paint (COGL_TEXTURE (slice_tex), flags);
}
}
static void
_cogl_texture_2d_sliced_ensure_non_quad_rendering (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
int i;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return;
/* Pass the call on to every slice */
for (i = 0; i < tex_2ds->slice_textures->len; i++)
{
CoglTexture2D *slice_tex = g_array_index (tex_2ds->slice_textures,
CoglTexture2D *, i);
_cogl_texture_ensure_non_quad_rendering (COGL_TEXTURE (slice_tex));
}
}
static CoglBool
_cogl_texture_2d_sliced_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)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
GLenum gl_format;
GLenum gl_type;
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* Send data to GL */
_cogl_texture_2d_sliced_upload_subregion_to_gl (tex_2ds,
src_x, src_y,
dst_x, dst_y,
dst_width, dst_height,
bmp,
gl_format,
gl_type);
cogl_object_unref (bmp);
return TRUE;
}
static CoglPixelFormat
_cogl_texture_2d_sliced_get_format (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return 0;
/* Pass the call on to the first slice */
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
return cogl_texture_get_format (COGL_TEXTURE (slice_tex));
}
static GLenum
_cogl_texture_2d_sliced_get_gl_format (CoglTexture *tex)
{
CoglTexture2DSliced *tex_2ds = COGL_TEXTURE_2D_SLICED (tex);
CoglTexture2D *slice_tex;
/* Make sure slices were created */
if (tex_2ds->slice_textures == NULL)
return 0;
/* Pass the call on to the first slice */
slice_tex = g_array_index (tex_2ds->slice_textures, CoglTexture2D *, 0);
return _cogl_texture_get_gl_format (COGL_TEXTURE (slice_tex));
}
static int
_cogl_texture_2d_sliced_get_width (CoglTexture *tex)
{
return COGL_TEXTURE_2D_SLICED (tex)->width;
}
static int
_cogl_texture_2d_sliced_get_height (CoglTexture *tex)
{
return COGL_TEXTURE_2D_SLICED (tex)->height;
}
static CoglTextureType
_cogl_texture_2d_sliced_get_type (CoglTexture *tex)
{
return COGL_TEXTURE_TYPE_2D;
}
static const CoglTextureVtable
cogl_texture_2d_sliced_vtable =
{
FALSE, /* not primitive */
_cogl_texture_2d_sliced_set_region,
NULL, /* get_data */
_cogl_texture_2d_sliced_foreach_sub_texture_in_region,
_cogl_texture_2d_sliced_get_max_waste,
_cogl_texture_2d_sliced_is_sliced,
_cogl_texture_2d_sliced_can_hardware_repeat,
_cogl_texture_2d_sliced_transform_coords_to_gl,
_cogl_texture_2d_sliced_transform_quad_coords_to_gl,
_cogl_texture_2d_sliced_get_gl_texture,
_cogl_texture_2d_sliced_set_filters,
_cogl_texture_2d_sliced_pre_paint,
_cogl_texture_2d_sliced_ensure_non_quad_rendering,
_cogl_texture_2d_sliced_set_wrap_mode_parameters,
_cogl_texture_2d_sliced_get_format,
_cogl_texture_2d_sliced_get_gl_format,
_cogl_texture_2d_sliced_get_width,
_cogl_texture_2d_sliced_get_height,
_cogl_texture_2d_sliced_get_type,
_cogl_texture_2d_sliced_is_foreign,
NULL /* set_auto_mipmap */
};
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