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mutter/cogl/cogl-texture-2d.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) 2009 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-2d-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 "cogl-framebuffer-private.h"
#include "cogl-winsys-egl-private.h"
#include <string.h>
#include <math.h>
#ifdef COGL_HAS_WAYLAND_EGL_SERVER_SUPPORT
#include <wayland-server.h>
#endif
static void _cogl_texture_2d_free (CoglTexture2D *tex_2d);
COGL_TEXTURE_DEFINE (Texture2D, texture_2d);
static const CoglTextureVtable cogl_texture_2d_vtable;
typedef struct _CoglTexture2DManualRepeatData
{
CoglTexture2D *tex_2d;
CoglTextureSliceCallback callback;
void *user_data;
} CoglTexture2DManualRepeatData;
static void
_cogl_texture_2d_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_2d_manual_repeat_cb (const float *coords,
void *user_data)
{
CoglTexture2DManualRepeatData *data = user_data;
float slice_coords[4];
_cogl_texture_2d_wrap_coords (coords[0], coords[2],
slice_coords + 0, slice_coords + 2);
_cogl_texture_2d_wrap_coords (coords[1], coords[3],
slice_coords + 1, slice_coords + 3);
data->callback (COGL_TEXTURE (data->tex_2d),
slice_coords,
coords,
data->user_data);
}
static void
_cogl_texture_2d_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)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
CoglTexture2DManualRepeatData data;
data.tex_2d = tex_2d;
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_2d_manual_repeat_cb,
virtual_tx_1, virtual_ty_1,
virtual_tx_2, virtual_ty_2,
&data);
}
static void
_cogl_texture_2d_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (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 2D doesn't make use of the r
coordinate so we can ignore its wrap mode */
if (tex_2d->wrap_mode_s != wrap_mode_s ||
tex_2d->wrap_mode_t != wrap_mode_t)
{
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_TEXTURE_WRAP_S,
wrap_mode_s) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_TEXTURE_WRAP_T,
wrap_mode_t) );
tex_2d->wrap_mode_s = wrap_mode_s;
tex_2d->wrap_mode_t = wrap_mode_t;
}
}
static void
_cogl_texture_2d_free (CoglTexture2D *tex_2d)
{
if (!tex_2d->is_foreign)
_cogl_delete_gl_texture (tex_2d->gl_texture);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_2d));
}
static gboolean
_cogl_texture_2d_can_create (unsigned int width,
unsigned int height,
CoglPixelFormat internal_format)
{
GLenum gl_intformat;
GLenum gl_type;
_COGL_GET_CONTEXT (ctx, FALSE);
/* If NPOT textures aren't supported then the size must be a power
of two */
if (!cogl_features_available (COGL_FEATURE_TEXTURE_NPOT) &&
(!_cogl_util_is_pot (width) ||
!_cogl_util_is_pot (height)))
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_2D,
gl_intformat,
gl_type,
width,
height))
return FALSE;
return TRUE;
}
static CoglTexture2D *
_cogl_texture_2d_create_base (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTexture2D *tex_2d = g_new (CoglTexture2D, 1);
CoglTexture *tex = COGL_TEXTURE (tex_2d);
_cogl_texture_init (tex, &cogl_texture_2d_vtable);
tex_2d->width = width;
tex_2d->height = height;
tex_2d->mipmaps_dirty = TRUE;
tex_2d->auto_mipmap = (flags & COGL_TEXTURE_NO_AUTO_MIPMAP) == 0;
/* We default to GL_LINEAR for both filters */
tex_2d->min_filter = GL_LINEAR;
tex_2d->mag_filter = GL_LINEAR;
/* Wrap mode not yet set */
tex_2d->wrap_mode_s = GL_FALSE;
tex_2d->wrap_mode_t = GL_FALSE;
tex_2d->is_foreign = FALSE;
tex_2d->format = internal_format;
return tex_2d;
}
CoglTexture2D *
cogl_texture_2d_new_with_size (CoglContext *ctx,
int width,
int height,
CoglPixelFormat internal_format,
GError **error)
{
CoglTexture2D *tex_2d;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
/* 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_2d_can_create (width, height, internal_format))
{
g_set_error (error, COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_SIZE,
"Failed to create texture 2d due to size/format"
" constraints");
return NULL;
}
internal_format = ctx->texture_driver->pixel_format_to_gl (internal_format,
&gl_intformat,
&gl_format,
&gl_type);
tex_2d = _cogl_texture_2d_create_base (width, height, COGL_TEXTURE_NONE,
internal_format);
ctx->texture_driver->gen (GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexImage2D (GL_TEXTURE_2D, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL) );
return _cogl_texture_2d_handle_new (tex_2d);
}
CoglHandle
_cogl_texture_2d_new_from_bitmap (CoglBitmap *bmp,
CoglTextureFlags flags,
CoglPixelFormat internal_format,
GError **error)
{
CoglTexture2D *tex_2d;
CoglBitmap *dst_bmp;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
guint8 *data;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
g_return_val_if_fail (bmp != NULL, COGL_INVALID_HANDLE);
internal_format =
_cogl_texture_determine_internal_format (_cogl_bitmap_get_format (bmp),
internal_format);
if (!_cogl_texture_2d_can_create (_cogl_bitmap_get_width (bmp),
_cogl_bitmap_get_height (bmp),
internal_format))
{
g_set_error (error, COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_SIZE,
"Failed to create texture 2d due to size/format"
" constraints");
return NULL;
}
if ((dst_bmp = _cogl_texture_prepare_for_upload (bmp,
internal_format,
&internal_format,
&gl_intformat,
&gl_format,
&gl_type)) == NULL)
{
g_set_error (error, COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_FORMAT,
"Failed to prepare texture upload due to format");
return NULL;
}
tex_2d = _cogl_texture_2d_create_base (_cogl_bitmap_get_width (bmp),
_cogl_bitmap_get_height (bmp),
flags,
internal_format);
/* Keep a copy of the first pixel so that if glGenerateMipmap isn't
supported we can fallback to using GL_GENERATE_MIPMAP */
if (!cogl_features_available (COGL_FEATURE_OFFSCREEN) &&
(data = _cogl_bitmap_map (dst_bmp,
COGL_BUFFER_ACCESS_READ, 0)))
{
tex_2d->first_pixel.gl_format = gl_format;
tex_2d->first_pixel.gl_type = gl_type;
memcpy (tex_2d->first_pixel.data, data,
_cogl_get_format_bpp (_cogl_bitmap_get_format (dst_bmp)));
_cogl_bitmap_unmap (dst_bmp);
}
ctx->texture_driver->gen (GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
ctx->texture_driver->upload_to_gl (GL_TEXTURE_2D,
tex_2d->gl_texture,
FALSE,
dst_bmp,
gl_intformat,
gl_format,
gl_type);
tex_2d->gl_format = gl_intformat;
cogl_object_unref (dst_bmp);
return _cogl_texture_2d_handle_new (tex_2d);
}
CoglTexture2D *
cogl_texture_2d_new_from_data (CoglContext *ctx,
int width,
int height,
CoglPixelFormat format,
CoglPixelFormat internal_format,
int rowstride,
const guint8 *data,
GError **error)
{
CoglBitmap *bmp;
CoglHandle tex;
g_return_val_if_fail (format != COGL_PIXEL_FORMAT_ANY, NULL);
g_return_val_if_fail (data != NULL, NULL);
/* Rowstride from width if not given */
if (rowstride == 0)
rowstride = width * _cogl_get_format_bpp (format);
/* Wrap the data into a bitmap */
bmp = _cogl_bitmap_new_from_data ((guint8 *)data,
format,
width,
height,
rowstride,
NULL, NULL);
tex =_cogl_texture_2d_new_from_bitmap (bmp, COGL_TEXTURE_NONE,
internal_format,
error);
cogl_object_unref (bmp);
return tex;
}
CoglTexture2D *
cogl_texture_2d_new_from_foreign (CoglContext *ctx,
GLuint gl_handle,
int width,
int height,
CoglPixelFormat format,
GError **error)
{
/* 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;
CoglTexture2D *tex_2d;
if (!ctx->texture_driver->allows_foreign_gl_target (GL_TEXTURE_2D))
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_2D, gl_handle, TRUE);
if (ctx->glGetError () != GL_NO_ERROR)
return COGL_INVALID_HANDLE;
/* Obtain texture parameters
(only level 0 we are interested in) */
#if HAVE_COGL_GL
if (ctx->driver == COGL_DRIVER_GL)
{
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 0,
GL_TEXTURE_COMPRESSED,
&gl_compressed) );
{
GLint val;
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 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;
/* Note: previously this code would query the texture object for
whether it has GL_GENERATE_MIPMAP enabled to determine whether to
auto-generate the mipmap. This doesn't make much sense any more
since Cogl switch to using glGenerateMipmap. Ideally I think
cogl_texture_new_from_foreign should take a flags parameter so
that the application can decide whether it wants
auto-mipmapping. To be compatible with existing code, Cogl now
disables its own auto-mipmapping but leaves the value of
GL_GENERATE_MIPMAP alone so that it would still work but without
the dirtiness tracking that Cogl would do. */
/* Create new texture */
tex_2d = _cogl_texture_2d_create_base (width, height,
COGL_TEXTURE_NO_AUTO_MIPMAP,
format);
/* Setup bitmap info */
tex_2d->is_foreign = TRUE;
tex_2d->mipmaps_dirty = TRUE;
tex_2d->format = format;
tex_2d->gl_texture = gl_handle;
tex_2d->gl_format = gl_int_format;
/* Unknown filter */
tex_2d->min_filter = GL_FALSE;
tex_2d->mag_filter = GL_FALSE;
return _cogl_texture_2d_handle_new (tex_2d);
}
#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
/* NB: The reason we require the width, height and format to be passed
* even though they may seem redundant is because GLES 1/2 don't
* provide a way to query these properties. */
CoglTexture2D *
_cogl_egl_texture_2d_new_from_image (CoglContext *ctx,
int width,
int height,
CoglPixelFormat format,
EGLImageKHR image,
GError **error)
{
CoglTexture2D *tex_2d;
GLenum gl_error;
g_return_val_if_fail (_cogl_context_get_winsys (ctx) ==
_cogl_winsys_egl_get_vtable (),
NULL);
g_return_val_if_fail (ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE,
NULL);
tex_2d = _cogl_texture_2d_create_base (width, height, COGL_TEXTURE_NONE,
format);
ctx->texture_driver->gen (GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
FALSE);
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glEGLImageTargetTexture2D (GL_TEXTURE_2D, image);
if (ctx->glGetError () != GL_NO_ERROR)
{
g_set_error (error,
COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_BAD_PARAMETER,
"Could not create a CoglTexture2D from a given EGLImage");
return NULL;
}
return _cogl_texture_2d_handle_new (tex_2d);
}
#endif /* defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base) */
#ifdef COGL_HAS_WAYLAND_EGL_SERVER_SUPPORT
static CoglPixelFormat
get_buffer_format (struct wl_buffer *buffer)
{
struct wl_compositor *compositor = buffer->compositor;
struct wl_visual *visual = buffer->visual;
#if G_BYTE_ORDER == G_BIG_ENDIAN
if (visual == &compositor->premultiplied_argb_visual)
return COGL_PIXEL_FORMAT_ARGB_8888_PRE;
else if (visual == &compositor->argb_visual)
return COGL_PIXEL_FORMAT_ARGB_8888;
else if (visual == &compositor->rgb_visual)
return COGL_PIXEL_FORMAT_RGB_888;
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
if (visual == &compositor->premultiplied_argb_visual)
return COGL_PIXEL_FORMAT_BGRA_8888_PRE;
else if (visual == &compositor->argb_visual)
return COGL_PIXEL_FORMAT_BGRA_8888;
else if (visual == &compositor->rgb_visual)
return COGL_PIXEL_FORMAT_BGR_888;
#endif
else
g_return_val_if_reached (COGL_PIXEL_FORMAT_ANY);
}
CoglTexture2D *
cogl_wayland_texture_2d_new_from_buffer (CoglContext *ctx,
struct wl_buffer *buffer,
GError **error)
{
CoglPixelFormat format = get_buffer_format (buffer);
if (wl_buffer_is_shm (buffer))
{
int stride = wl_shm_buffer_get_stride (buffer);
return cogl_texture_2d_new_from_data (ctx,
buffer->width,
buffer->height,
format,
COGL_PIXEL_FORMAT_ANY,
stride,
wl_shm_buffer_get_data (buffer),
error);
}
else
{
EGLImageKHR image;
g_return_val_if_fail (_cogl_context_get_winsys (ctx) ==
_cogl_winsys_egl_get_vtable (),
NULL);
image = _cogl_egl_create_image (ctx,
EGL_WAYLAND_BUFFER_WL,
buffer,
NULL);
return _cogl_egl_texture_2d_new_from_image (ctx,
buffer->width,
buffer->height,
format,
image,
error);
}
}
#endif /* COGL_HAS_WAYLAND_EGL_SERVER_SUPPORT */
void
_cogl_texture_2d_externally_modified (CoglHandle handle)
{
if (!cogl_is_texture_2d (handle))
return;
COGL_TEXTURE_2D (handle)->mipmaps_dirty = TRUE;
}
void
_cogl_texture_2d_copy_from_framebuffer (CoglHandle handle,
int dst_x,
int dst_y,
int src_x,
int src_y,
int width,
int height)
{
CoglTexture2D *tex_2d;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_return_if_fail (cogl_is_texture_2d (handle));
tex_2d = COGL_TEXTURE_2D (handle);
/* Make sure the current framebuffers are bound. We explicitly avoid
flushing the clip state so we can bind our own empty state */
_cogl_framebuffer_flush_state (cogl_get_draw_framebuffer (),
_cogl_get_read_framebuffer (),
0);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
ctx->glCopyTexSubImage2D (GL_TEXTURE_2D,
0, /* level */
dst_x, dst_y,
src_x, src_y,
width, height);
tex_2d->mipmaps_dirty = TRUE;
}
static int
_cogl_texture_2d_get_max_waste (CoglTexture *tex)
{
return -1;
}
static gboolean
_cogl_texture_2d_is_sliced (CoglTexture *tex)
{
return FALSE;
}
static gboolean
_cogl_texture_2d_can_hardware_repeat (CoglTexture *tex)
{
return TRUE;
}
static void
_cogl_texture_2d_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
/* The texture coordinates map directly so we don't need to do
anything */
}
static CoglTransformResult
_cogl_texture_2d_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
/* The texture coordinates map directly so we don't need to do
anything other than check for repeats */
gboolean need_repeat = FALSE;
int i;
for (i = 0; i < 4; i++)
if (coords[i] < 0.0f || coords[i] > 1.0f)
need_repeat = TRUE;
return (need_repeat ? COGL_TRANSFORM_HARDWARE_REPEAT
: COGL_TRANSFORM_NO_REPEAT);
}
static gboolean
_cogl_texture_2d_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
if (out_gl_handle)
*out_gl_handle = tex_2d->gl_texture;
if (out_gl_target)
*out_gl_target = GL_TEXTURE_2D;
return TRUE;
}
static void
_cogl_texture_2d_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (min_filter == tex_2d->min_filter
&& mag_filter == tex_2d->mag_filter)
return;
/* Store new values */
tex_2d->min_filter = min_filter;
tex_2d->mag_filter = mag_filter;
/* Apply new filters to the texture */
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter) );
}
static void
_cogl_texture_2d_pre_paint (CoglTexture *tex, CoglTexturePrePaintFlags flags)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Only update if the mipmaps are dirty */
if ((flags & COGL_TEXTURE_NEEDS_MIPMAP) &&
tex_2d->auto_mipmap && tex_2d->mipmaps_dirty)
{
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
/* glGenerateMipmap is defined in the FBO extension. If it's not
available we'll fallback to temporarily enabling
GL_GENERATE_MIPMAP and reuploading the first pixel */
if (cogl_features_available (COGL_FEATURE_OFFSCREEN))
ctx->texture_driver->gl_generate_mipmaps (GL_TEXTURE_2D);
#if defined(HAVE_COGL_GLES) || defined(HAVE_COGL_GL)
else
{
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_GENERATE_MIPMAP,
GL_TRUE) );
GE( ctx, glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, 1, 1,
tex_2d->first_pixel.gl_format,
tex_2d->first_pixel.gl_type,
tex_2d->first_pixel.data) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_GENERATE_MIPMAP,
GL_FALSE) );
}
#endif
tex_2d->mipmaps_dirty = FALSE;
}
}
static void
_cogl_texture_2d_ensure_non_quad_rendering (CoglTexture *tex)
{
/* Nothing needs to be done */
}
static gboolean
_cogl_texture_2d_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)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
GLenum gl_format;
GLenum gl_type;
guint8 *data;
_COGL_GET_CONTEXT (ctx, FALSE);
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* If this touches the first pixel then we'll update our copy */
if (dst_x == 0 && dst_y == 0 &&
!cogl_features_available (COGL_FEATURE_OFFSCREEN) &&
(data = _cogl_bitmap_map (bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
CoglPixelFormat bpp =
_cogl_get_format_bpp (_cogl_bitmap_get_format (bmp));
tex_2d->first_pixel.gl_format = gl_format;
tex_2d->first_pixel.gl_type = gl_type;
memcpy (tex_2d->first_pixel.data,
data + _cogl_bitmap_get_rowstride (bmp) * src_y + bpp * src_x,
bpp);
_cogl_bitmap_unmap (bmp);
}
/* Send data to GL */
ctx->texture_driver->upload_subregion_to_gl (GL_TEXTURE_2D,
tex_2d->gl_texture,
FALSE,
src_x, src_y,
dst_x, dst_y,
dst_width, dst_height,
bmp,
gl_format,
gl_type);
tex_2d->mipmaps_dirty = TRUE;
cogl_object_unref (bmp);
return TRUE;
}
static gboolean
_cogl_texture_2d_get_data (CoglTexture *tex,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (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_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
return ctx->texture_driver->gl_get_tex_image (GL_TEXTURE_2D,
gl_format,
gl_type,
data);
}
static CoglPixelFormat
_cogl_texture_2d_get_format (CoglTexture *tex)
{
return COGL_TEXTURE_2D (tex)->format;
}
static GLenum
_cogl_texture_2d_get_gl_format (CoglTexture *tex)
{
return COGL_TEXTURE_2D (tex)->gl_format;
}
static int
_cogl_texture_2d_get_width (CoglTexture *tex)
{
return COGL_TEXTURE_2D (tex)->width;
}
static int
_cogl_texture_2d_get_height (CoglTexture *tex)
{
return COGL_TEXTURE_2D (tex)->height;
}
static gboolean
_cogl_texture_2d_is_foreign (CoglTexture *tex)
{
return COGL_TEXTURE_2D (tex)->is_foreign;
}
static const CoglTextureVtable
cogl_texture_2d_vtable =
{
_cogl_texture_2d_set_region,
_cogl_texture_2d_get_data,
_cogl_texture_2d_foreach_sub_texture_in_region,
_cogl_texture_2d_get_max_waste,
_cogl_texture_2d_is_sliced,
_cogl_texture_2d_can_hardware_repeat,
_cogl_texture_2d_transform_coords_to_gl,
_cogl_texture_2d_transform_quad_coords_to_gl,
_cogl_texture_2d_get_gl_texture,
_cogl_texture_2d_set_filters,
_cogl_texture_2d_pre_paint,
_cogl_texture_2d_ensure_non_quad_rendering,
_cogl_texture_2d_set_wrap_mode_parameters,
_cogl_texture_2d_get_format,
_cogl_texture_2d_get_gl_format,
_cogl_texture_2d_get_width,
_cogl_texture_2d_get_height,
_cogl_texture_2d_is_foreign
};
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