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mutter/cogl/cogl-texture-rectangle.c
Neil Roberts 503f138fb6 texture: Call _cogl_texture_prepare_for_upload in set_region impl 
Instead of calling _cogl_texutre_prepare_for_upload in
cogl_texture_set_region_from_bitmap the call is now deferred to the
implementation of the virtual for set_region. This is needed if the
texture backend is using a different format for the actual GL texture
than what is reported by cogl_texture_get_format. This happens for
example with atlas textures which report the original internal format
specified when the texture was created but actually always store the
data in an RGBA texture.

Also when creating an atlas texture from a bitmap it was preparing the
bitmap to be uploaded to the original format instead of the format of
the actual texture used for the atlas. Then it was using
cogl_texture_set_region_from_bitmap to upload the 5 pieces to make the
copies of the edge pixels. This would end up converting the image to
the actual format 5 times. The atlas textures have now been changed to
prepare the bitmap for the right format.

https://bugzilla.gnome.org/show_bug.cgi?id=657840

Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-09-05 19:02:04 +01:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 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-texture-rectangle-private.h"
#include "cogl-texture-driver.h"
#include "cogl-context-private.h"
#include "cogl-handle.h"
#include "cogl-journal-private.h"
#include "cogl-pipeline-opengl-private.h"
#include <string.h>
#include <math.h>
/* These aren't defined under GLES */
#ifndef GL_TEXTURE_RECTANGLE_ARB
#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
#endif
#ifndef GL_CLAMP
#define GL_CLAMP 0x2900
#endif
#ifndef GL_CLAMP_TO_BORDER
#define GL_CLAMP_TO_BORDER 0x812D
#endif
static void _cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect);
COGL_TEXTURE_INTERNAL_DEFINE (TextureRectangle, texture_rectangle);
static const CoglTextureVtable cogl_texture_rectangle_vtable;
typedef struct _CoglTextureRectangleManualRepeatData
{
CoglTextureRectangle *tex_rect;
CoglTextureSliceCallback callback;
void *user_data;
} CoglTextureRectangleManualRepeatData;
static void
_cogl_texture_rectangle_wrap_coords (float t_1, float t_2,
float *out_t_1, float *out_t_2)
{
float int_part;
/* Wrap t_1 and t_2 to the range [0,1] */
modff (t_1 < t_2 ? t_1 : t_2, &int_part);
t_1 -= int_part;
t_2 -= int_part;
if (cogl_util_float_signbit (int_part))
{
*out_t_1 = 1.0f + t_1;
*out_t_2 = 1.0f + t_2;
}
else
{
*out_t_1 = t_1;
*out_t_2 = t_2;
}
}
static void
_cogl_texture_rectangle_manual_repeat_cb (const float *coords,
void *user_data)
{
CoglTextureRectangleManualRepeatData *data = user_data;
float slice_coords[4];
_cogl_texture_rectangle_wrap_coords (coords[0], coords[2],
slice_coords + 0, slice_coords + 2);
_cogl_texture_rectangle_wrap_coords (coords[1], coords[3],
slice_coords + 1, slice_coords + 3);
slice_coords[0] *= data->tex_rect->width;
slice_coords[1] *= data->tex_rect->height;
slice_coords[2] *= data->tex_rect->width;
slice_coords[3] *= data->tex_rect->height;
data->callback (COGL_TEXTURE (data->tex_rect),
slice_coords,
coords,
data->user_data);
}
static void
_cogl_texture_rectangle_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)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
CoglTextureRectangleManualRepeatData data;
data.tex_rect = tex_rect;
data.callback = callback;
data.user_data = user_data;
/* We need to implement manual repeating because if Cogl is calling
this function then it will set the wrap mode to GL_CLAMP_TO_EDGE
and hardware repeating can't be done */
_cogl_texture_iterate_manual_repeats
(_cogl_texture_rectangle_manual_repeat_cb,
virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2,
&data);
}
static gboolean
can_use_wrap_mode (GLenum wrap_mode)
{
return (wrap_mode == GL_CLAMP ||
wrap_mode == GL_CLAMP_TO_EDGE ||
wrap_mode == GL_CLAMP_TO_BORDER);
}
static void
_cogl_texture_rectangle_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Only set the wrap mode if it's different from the current value
to avoid too many GL calls. Texture rectangle doesn't make use of
the r coordinate so we can ignore its wrap mode */
if (tex_rect->wrap_mode_s != wrap_mode_s ||
tex_rect->wrap_mode_t != wrap_mode_t)
{
g_assert (can_use_wrap_mode (wrap_mode_s));
g_assert (can_use_wrap_mode (wrap_mode_t));
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
tex_rect->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_S, wrap_mode_s) );
GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_T, wrap_mode_t) );
tex_rect->wrap_mode_s = wrap_mode_s;
tex_rect->wrap_mode_t = wrap_mode_t;
}
}
static void
_cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect)
{
if (!tex_rect->is_foreign)
_cogl_delete_gl_texture (tex_rect->gl_texture);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_rect));
}
static gboolean
_cogl_texture_rectangle_can_create (unsigned int width,
unsigned int height,
CoglPixelFormat internal_format)
{
GLenum gl_intformat;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, FALSE);
if (!cogl_features_available (COGL_FEATURE_TEXTURE_RECTANGLE))
return FALSE;
ctx->texture_driver->pixel_format_to_gl (internal_format,
&gl_intformat,
NULL,
&gl_type);
/* Check that the driver can create a texture with that size */
if (!ctx->texture_driver->size_supported (GL_TEXTURE_RECTANGLE_ARB,
gl_intformat,
gl_type,
width,
height))
return FALSE;
return TRUE;
}
static CoglTextureRectangle *
_cogl_texture_rectangle_create_base (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect = g_new (CoglTextureRectangle, 1);
CoglTexture *tex = COGL_TEXTURE (tex_rect);
_cogl_texture_init (tex, &cogl_texture_rectangle_vtable);
tex_rect->width = width;
tex_rect->height = height;
/* We default to GL_LINEAR for both filters */
tex_rect->min_filter = GL_LINEAR;
tex_rect->mag_filter = GL_LINEAR;
/* Wrap mode not yet set */
tex_rect->wrap_mode_s = GL_FALSE;
tex_rect->wrap_mode_t = GL_FALSE;
tex_rect->format = internal_format;
return tex_rect;
}
CoglHandle
_cogl_texture_rectangle_new_with_size (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
/* Since no data, we need some internal format */
if (internal_format == COGL_PIXEL_FORMAT_ANY)
internal_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
if (!_cogl_texture_rectangle_can_create (width, height, internal_format))
return COGL_INVALID_HANDLE;
internal_format = ctx->texture_driver->pixel_format_to_gl (internal_format,
&gl_intformat,
&gl_format,
&gl_type);
tex_rect = _cogl_texture_rectangle_create_base (width, height, flags,
internal_format);
ctx->texture_driver->gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
tex_rect->is_foreign);
GE( ctx, glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL) );
return _cogl_texture_rectangle_handle_new (tex_rect);
}
CoglHandle
_cogl_texture_rectangle_new_from_bitmap (CoglBitmap *bmp,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect;
CoglBitmap *dst_bmp;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
g_return_val_if_fail (cogl_is_bitmap (bmp), COGL_INVALID_HANDLE);
internal_format =
_cogl_texture_determine_internal_format (_cogl_bitmap_get_format (bmp),
internal_format);
if (!_cogl_texture_rectangle_can_create (_cogl_bitmap_get_width (bmp),
_cogl_bitmap_get_height (bmp),
internal_format))
return COGL_INVALID_HANDLE;
dst_bmp = _cogl_texture_prepare_for_upload (bmp,
internal_format,
&internal_format,
&gl_intformat,
&gl_format,
&gl_type);
if (dst_bmp == NULL)
return COGL_INVALID_HANDLE;
tex_rect = _cogl_texture_rectangle_create_base (_cogl_bitmap_get_width (bmp),
_cogl_bitmap_get_height (bmp),
flags,
internal_format);
ctx->texture_driver->gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
ctx->texture_driver->upload_to_gl (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE,
dst_bmp,
gl_intformat,
gl_format,
gl_type);
tex_rect->gl_format = gl_intformat;
cogl_object_unref (dst_bmp);
return _cogl_texture_rectangle_handle_new (tex_rect);
}
CoglHandle
_cogl_texture_rectangle_new_from_foreign (GLuint gl_handle,
GLuint width,
GLuint height,
CoglPixelFormat format)
{
/* NOTE: width, height and internal format are not queriable
* in GLES, hence such a function prototype.
*/
GLenum gl_error = 0;
GLint gl_compressed = GL_FALSE;
GLenum gl_int_format = 0;
CoglTextureRectangle *tex_rect;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
if (!ctx->texture_driver->allows_foreign_gl_target (GL_TEXTURE_RECTANGLE_ARB))
return COGL_INVALID_HANDLE;
/* Make sure it is a valid GL texture object */
if (!ctx->glIsTexture (gl_handle))
return COGL_INVALID_HANDLE;
/* Make sure binding succeeds */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB, gl_handle, TRUE);
if (ctx->glGetError () != GL_NO_ERROR)
return COGL_INVALID_HANDLE;
/* Obtain texture parameters */
#if HAVE_COGL_GL
if (ctx->driver == COGL_DRIVER_GL)
{
GLint val;
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
GL_TEXTURE_COMPRESSED,
&gl_compressed) );
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
GL_TEXTURE_INTERNAL_FORMAT,
&val) );
gl_int_format = val;
/* If we can query GL for the actual pixel format then we'll ignore
the passed in format and use that. */
if (!ctx->texture_driver->pixel_format_from_gl_internal (gl_int_format,
&format))
return COGL_INVALID_HANDLE;
}
else
#endif
{
/* Otherwise we'll assume we can derive the GL format from the
passed in format */
ctx->texture_driver->pixel_format_to_gl (format,
&gl_int_format,
NULL,
NULL);
}
/* Note: We always trust the given width and height without querying
* the texture object because the user may be creating a Cogl
* texture for a texture_from_pixmap object where glTexImage2D may
* not have been called and the texture_from_pixmap spec doesn't
* clarify that it is reliable to query back the size from OpenGL.
*/
/* Validate width and height */
if (width <= 0 || height <= 0)
return COGL_INVALID_HANDLE;
/* Compressed texture images not supported */
if (gl_compressed == GL_TRUE)
return COGL_INVALID_HANDLE;
/* Create new texture */
tex_rect = _cogl_texture_rectangle_create_base (width, height,
COGL_TEXTURE_NO_AUTO_MIPMAP,
format);
/* Setup bitmap info */
tex_rect->is_foreign = TRUE;
tex_rect->format = format;
tex_rect->gl_texture = gl_handle;
tex_rect->gl_format = gl_int_format;
/* Unknown filter */
tex_rect->min_filter = GL_FALSE;
tex_rect->mag_filter = GL_FALSE;
return _cogl_texture_rectangle_handle_new (tex_rect);
}
static int
_cogl_texture_rectangle_get_max_waste (CoglTexture *tex)
{
return -1;
}
static gboolean
_cogl_texture_rectangle_is_sliced (CoglTexture *tex)
{
return FALSE;
}
static gboolean
_cogl_texture_rectangle_can_hardware_repeat (CoglTexture *tex)
{
return FALSE;
}
static void
_cogl_texture_rectangle_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
*s *= tex_rect->width;
*t *= tex_rect->height;
}
static CoglTransformResult
_cogl_texture_rectangle_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
gboolean need_repeat = FALSE;
int i;
for (i = 0; i < 4; i++)
{
if (coords[i] < 0.0f || coords[i] > 1.0f)
need_repeat = TRUE;
coords[i] *= (i & 1) ? tex_rect->height : tex_rect->width;
}
return (need_repeat ? COGL_TRANSFORM_SOFTWARE_REPEAT
: COGL_TRANSFORM_NO_REPEAT);
}
static gboolean
_cogl_texture_rectangle_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
if (out_gl_handle)
*out_gl_handle = tex_rect->gl_texture;
if (out_gl_target)
*out_gl_target = GL_TEXTURE_RECTANGLE_ARB;
return TRUE;
}
static void
_cogl_texture_rectangle_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (min_filter == tex_rect->min_filter
&& mag_filter == tex_rect->mag_filter)
return;
/* Rectangle textures don't support mipmapping */
g_assert (min_filter == GL_LINEAR || min_filter == GL_NEAREST);
/* Store new values */
tex_rect->min_filter = min_filter;
tex_rect->mag_filter = mag_filter;
/* Apply new filters to the texture */
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
tex_rect->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
mag_filter) );
GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
min_filter) );
}
static void
_cogl_texture_rectangle_pre_paint (CoglTexture *tex,
CoglTexturePrePaintFlags flags)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Rectangle textures don't support mipmaps */
g_assert ((flags & COGL_TEXTURE_NEEDS_MIPMAP) == 0);
}
static void
_cogl_texture_rectangle_ensure_non_quad_rendering (CoglTexture *tex)
{
/* Nothing needs to be done */
}
static gboolean
_cogl_texture_rectangle_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)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
GLenum gl_format;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, FALSE);
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* Send data to GL */
ctx->texture_driver->upload_subregion_to_gl (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE,
src_x, src_y,
dst_x, dst_y,
dst_width, dst_height,
bmp,
gl_format,
gl_type);
cogl_object_unref (bmp);
return TRUE;
}
static gboolean
_cogl_texture_rectangle_get_data (CoglTexture *tex,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
int bpp;
GLenum gl_format;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, FALSE);
bpp = _cogl_get_format_bpp (format);
ctx->texture_driver->pixel_format_to_gl (format,
NULL, /* internal format */
&gl_format,
&gl_type);
ctx->texture_driver->prep_gl_for_pixels_download (rowstride, bpp);
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
tex_rect->is_foreign);
return ctx->texture_driver->gl_get_tex_image (GL_TEXTURE_RECTANGLE_ARB,
gl_format,
gl_type,
data);
}
static CoglPixelFormat
_cogl_texture_rectangle_get_format (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->format;
}
static GLenum
_cogl_texture_rectangle_get_gl_format (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->gl_format;
}
static int
_cogl_texture_rectangle_get_width (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->width;
}
static int
_cogl_texture_rectangle_get_height (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->height;
}
static gboolean
_cogl_texture_rectangle_is_foreign (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->is_foreign;
}
static const CoglTextureVtable
cogl_texture_rectangle_vtable =
{
_cogl_texture_rectangle_set_region,
_cogl_texture_rectangle_get_data,
_cogl_texture_rectangle_foreach_sub_texture_in_region,
_cogl_texture_rectangle_get_max_waste,
_cogl_texture_rectangle_is_sliced,
_cogl_texture_rectangle_can_hardware_repeat,
_cogl_texture_rectangle_transform_coords_to_gl,
_cogl_texture_rectangle_transform_quad_coords_to_gl,
_cogl_texture_rectangle_get_gl_texture,
_cogl_texture_rectangle_set_filters,
_cogl_texture_rectangle_pre_paint,
_cogl_texture_rectangle_ensure_non_quad_rendering,
_cogl_texture_rectangle_set_wrap_mode_parameters,
_cogl_texture_rectangle_get_format,
_cogl_texture_rectangle_get_gl_format,
_cogl_texture_rectangle_get_width,
_cogl_texture_rectangle_get_height,
_cogl_texture_rectangle_is_foreign
};
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