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05d42ed390
This is an optimised version of CoglTexture2DSliced that always deals with a single texture and always uses the GL_TEXTURE_2D target. cogl_texture_new_from_bitmap now tries to use this backend first. If it can't create a texture with that size then it falls back the sliced backend. cogl_texture_upload_data_prepare has been split into two functions because the sliced backend needs to know the real internal format before the conversion is performed. Otherwise the converted bitmap will be wasted if the backend can't support the size.
624 lines
19 KiB
C
624 lines
19 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl.h"
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#include "cogl-internal.h"
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#include "cogl-util.h"
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#include "cogl-texture-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-texture-driver.h"
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#include "cogl-context.h"
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#include "cogl-handle.h"
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#include <string.h>
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#include <math.h>
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static void _cogl_texture_2d_free (CoglTexture2D *tex_2d);
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COGL_HANDLE_DEFINE (Texture2D, texture_2d);
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static const CoglTextureVtable cogl_texture_2d_vtable;
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typedef struct _CoglTexture2DManualRepeatData
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{
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CoglTexture2D *tex_2d;
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CoglTextureSliceCallback callback;
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void *user_data;
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} CoglTexture2DManualRepeatData;
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static void
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_cogl_texture_2d_wrap_coords (float t_1, float t_2,
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float *out_t_1, float *out_t_2)
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{
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float int_part;
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/* Wrap t_1 and t_2 to the range [0,1] */
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modff (t_1 < t_2 ? t_1 : t_2, &int_part);
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t_1 -= int_part;
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t_2 -= int_part;
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if (signbit (int_part))
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{
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*out_t_1 = 1.0f - t_1;
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*out_t_2 = 1.0f - t_2;
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}
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else
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{
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*out_t_1 = t_1;
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*out_t_2 = t_2;
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}
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}
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static void
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_cogl_texture_2d_manual_repeat_cb (const float *coords,
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void *user_data)
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{
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CoglTexture2DManualRepeatData *data = user_data;
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float slice_coords[4];
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_cogl_texture_2d_wrap_coords (coords[0], coords[2],
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slice_coords + 0, slice_coords + 2);
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_cogl_texture_2d_wrap_coords (coords[1], coords[3],
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slice_coords + 1, slice_coords + 3);
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data->callback (COGL_TEXTURE (data->tex_2d),
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data->tex_2d->gl_texture,
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GL_TEXTURE_2D,
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slice_coords,
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coords,
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data->user_data);
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}
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static void
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_cogl_texture_2d_foreach_sub_texture_in_region (
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CoglTexture *tex,
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float virtual_tx_1,
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float virtual_ty_1,
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float virtual_tx_2,
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float virtual_ty_2,
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CoglTextureSliceCallback callback,
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void *user_data)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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CoglTexture2DManualRepeatData data;
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data.tex_2d = tex_2d;
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data.callback = callback;
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data.user_data = user_data;
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/* We need to implement manual repeating because if Cogl is calling
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this function then it will set the wrap mode to GL_CLAMP_TO_EDGE
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and hardware repeating can't be done */
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_cogl_texture_iterate_manual_repeats (_cogl_texture_2d_manual_repeat_cb,
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virtual_tx_1, virtual_ty_1,
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virtual_tx_2, virtual_ty_2,
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&data);
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}
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static void
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_cogl_texture_2d_set_wrap_mode_parameter (CoglTexture *tex,
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GLenum wrap_mode)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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/* Only set the wrap mode if it's different from the current
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value to avoid too many GL calls */
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if (tex_2d->wrap_mode != wrap_mode)
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{
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/* Any queued texture rectangles may be depending on the
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* previous wrap mode... */
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_cogl_journal_flush ();
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GE( glBindTexture (GL_TEXTURE_2D, tex_2d->gl_texture) );
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GE( glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_mode) );
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GE( glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_mode) );
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tex_2d->wrap_mode = wrap_mode;
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}
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}
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static void
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_cogl_texture_2d_free (CoglTexture2D *tex_2d)
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{
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GE( glDeleteTextures (1, &tex_2d->gl_texture) );
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g_free (tex_2d);
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}
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static gboolean
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_cogl_texture_2d_is_pot (unsigned int num)
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{
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gboolean have_bit = FALSE;
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/* Make sure there is only one bit set */
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while (num)
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{
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if (num & 1)
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{
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if (have_bit)
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return FALSE;
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have_bit = TRUE;
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}
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num >>= 1;
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}
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return TRUE;
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}
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static gboolean
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_cogl_texture_2d_can_create (unsigned int width,
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unsigned int height,
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CoglPixelFormat internal_format)
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{
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GLenum gl_intformat;
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GLenum gl_type;
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/* If the driver doesn't support glGenerateMipmap then we need to
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store a copy of the first pixels to cause an update. Instead of
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duplicating the code here we'll just make it fallback to
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CoglTexture2DSliced */
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if (!cogl_features_available (COGL_FEATURE_OFFSCREEN))
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return FALSE;
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/* If NPOT textures aren't supported then the size must be a power
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of two */
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if (!cogl_features_available (COGL_FEATURE_TEXTURE_NPOT) &&
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(!_cogl_texture_2d_is_pot (width) ||
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!_cogl_texture_2d_is_pot (height)))
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return FALSE;
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_cogl_pixel_format_to_gl (internal_format,
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&gl_intformat,
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NULL,
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&gl_type);
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/* Check that the driver can create a texture with that size */
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if (!_cogl_texture_driver_size_supported (GL_TEXTURE_2D,
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gl_intformat,
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gl_type,
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width,
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height))
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return FALSE;
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return TRUE;
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}
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static CoglTexture2D *
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_cogl_texture_2d_create_base (unsigned int width,
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unsigned int height,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format)
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{
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CoglTexture2D *tex_2d = g_new (CoglTexture2D, 1);
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CoglTexture *tex = COGL_TEXTURE (tex_2d);
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tex->vtable = &cogl_texture_2d_vtable;
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tex_2d->width = width;
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tex_2d->height = height;
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tex_2d->mipmaps_dirty = TRUE;
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tex_2d->auto_mipmap = (flags & COGL_TEXTURE_NO_AUTO_MIPMAP) == 0;
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/* Unknown filter */
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tex_2d->min_filter = GL_FALSE;
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tex_2d->mag_filter = GL_FALSE;
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/* Wrap mode not yet set */
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tex_2d->wrap_mode = GL_FALSE;
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tex_2d->format = internal_format;
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return tex_2d;
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}
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CoglHandle
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_cogl_texture_2d_new_with_size (unsigned int width,
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unsigned int height,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format)
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{
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CoglTexture2D *tex_2d;
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GLenum gl_intformat;
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GLenum gl_format;
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GLenum gl_type;
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/* Since no data, we need some internal format */
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if (internal_format == COGL_PIXEL_FORMAT_ANY)
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internal_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
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if (!_cogl_texture_2d_can_create (width, height, internal_format))
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return COGL_INVALID_HANDLE;
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internal_format = _cogl_pixel_format_to_gl (internal_format,
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&gl_intformat,
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&gl_format,
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&gl_type);
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tex_2d = _cogl_texture_2d_create_base (width, height, flags, internal_format);
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GE( glGenTextures (1, &tex_2d->gl_texture) );
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GE( glBindTexture (GL_TEXTURE_2D, tex_2d->gl_texture) );
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GE( glTexImage2D (GL_TEXTURE_2D, 0, gl_intformat,
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width, height, 0, gl_format, gl_type, NULL) );
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return _cogl_texture_2d_handle_new (tex_2d);
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}
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CoglHandle
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_cogl_texture_2d_new_from_bitmap (CoglHandle bmp_handle,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format)
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{
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CoglTexture2D *tex_2d;
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CoglBitmap *bmp = (CoglBitmap *)bmp_handle;
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CoglTextureUploadData upload_data;
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g_return_val_if_fail (bmp_handle != COGL_INVALID_HANDLE, COGL_INVALID_HANDLE);
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upload_data.bitmap = *bmp;
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upload_data.bitmap_owner = FALSE;
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if (!_cogl_texture_upload_data_prepare_format (&upload_data,
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&internal_format) ||
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!_cogl_texture_2d_can_create (upload_data.bitmap.width,
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upload_data.bitmap.height,
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internal_format) ||
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!_cogl_texture_upload_data_convert (&upload_data, internal_format))
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{
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_cogl_texture_upload_data_free (&upload_data);
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return COGL_INVALID_HANDLE;
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}
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tex_2d = _cogl_texture_2d_create_base (upload_data.bitmap.width,
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upload_data.bitmap.height,
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flags,
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upload_data.bitmap.format);
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GE( glGenTextures (1, &tex_2d->gl_texture) );
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_cogl_texture_driver_upload_to_gl (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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&upload_data.bitmap,
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upload_data.gl_intformat,
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upload_data.gl_format,
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upload_data.gl_type);
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tex_2d->gl_format = upload_data.gl_intformat;
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_cogl_texture_upload_data_free (&upload_data);
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return _cogl_texture_2d_handle_new (tex_2d);
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}
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static gint
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_cogl_texture_2d_get_max_waste (CoglTexture *tex)
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{
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return -1;
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}
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static gboolean
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_cogl_texture_2d_is_sliced (CoglTexture *tex)
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{
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return FALSE;
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}
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static gboolean
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_cogl_texture_2d_can_hardware_repeat (CoglTexture *tex)
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{
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return TRUE;
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}
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static void
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_cogl_texture_2d_transform_coords_to_gl (CoglTexture *tex,
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float *s,
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float *t)
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{
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/* The texture coordinates map directly so we don't need to do
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anything */
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}
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static gboolean
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_cogl_texture_2d_get_gl_texture (CoglTexture *tex,
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GLuint *out_gl_handle,
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GLenum *out_gl_target)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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if (out_gl_handle)
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*out_gl_handle = tex_2d->gl_texture;
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if (out_gl_target)
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*out_gl_target = GL_TEXTURE_2D;
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return TRUE;
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}
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static void
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_cogl_texture_2d_set_filters (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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if (min_filter == tex_2d->min_filter
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&& mag_filter == tex_2d->mag_filter)
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return;
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/* Store new values */
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tex_2d->min_filter = min_filter;
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tex_2d->mag_filter = mag_filter;
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/* Apply new filters to the texture */
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GE( glBindTexture (GL_TEXTURE_2D, tex_2d->gl_texture) );
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GE( glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter) );
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GE( glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter) );
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}
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static void
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_cogl_texture_2d_ensure_mipmaps (CoglTexture *tex)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* Only update if the mipmaps are dirty */
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if (!tex_2d->auto_mipmap || !tex_2d->mipmaps_dirty)
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return;
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GE( glBindTexture (GL_TEXTURE_2D, tex_2d->gl_texture) );
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/* glGenerateMipmap is defined in the FBO extension. We only allow
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CoglTexture2D instances to be created if this feature is
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available so we don't need to check for the extension */
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_cogl_texture_driver_gl_generate_mipmaps (GL_TEXTURE_2D);
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tex_2d->mipmaps_dirty = FALSE;
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}
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static gboolean
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_cogl_texture_2d_set_region (CoglTexture *tex,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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unsigned int dst_width,
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unsigned int dst_height,
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int width,
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int height,
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CoglPixelFormat format,
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unsigned int rowstride,
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const guint8 *data)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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gint bpp;
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CoglBitmap source_bmp;
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CoglBitmap temp_bmp;
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gboolean source_bmp_owner = FALSE;
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CoglPixelFormat closest_format;
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GLenum closest_gl_format;
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GLenum closest_gl_type;
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gboolean success;
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/* Check for valid format */
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if (format == COGL_PIXEL_FORMAT_ANY)
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return FALSE;
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/* Shortcut out early if the image is empty */
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if (width == 0 || height == 0)
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return TRUE;
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/* Init source bitmap */
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source_bmp.width = width;
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source_bmp.height = height;
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source_bmp.format = format;
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source_bmp.data = (guchar*) data;
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/* Rowstride from width if none specified */
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bpp = _cogl_get_format_bpp (format);
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source_bmp.rowstride = (rowstride == 0) ? width * bpp : rowstride;
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/* Find closest format to internal that's supported by GL */
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closest_format = _cogl_pixel_format_to_gl (tex_2d->format,
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NULL, /* don't need */
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&closest_gl_format,
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&closest_gl_type);
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/* If no direct match, convert */
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if (closest_format != format)
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{
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/* Convert to required format */
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success = _cogl_bitmap_convert_and_premult (&source_bmp,
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&temp_bmp,
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closest_format);
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/* Swap bitmaps if succeeded */
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if (!success) return FALSE;
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source_bmp = temp_bmp;
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source_bmp_owner = TRUE;
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}
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/* Send data to GL */
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_cogl_texture_driver_upload_subregion_to_gl (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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src_x, src_y,
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dst_x, dst_y,
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dst_width, dst_height,
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&source_bmp,
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closest_gl_format,
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closest_gl_type);
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/* Free data if owner */
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if (source_bmp_owner)
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g_free (source_bmp.data);
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return TRUE;
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}
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static int
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_cogl_texture_2d_get_data (CoglTexture *tex,
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CoglPixelFormat format,
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unsigned int rowstride,
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guint8 *data)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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gint bpp;
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gint byte_size;
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CoglPixelFormat closest_format;
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gint closest_bpp;
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GLenum closest_gl_format;
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GLenum closest_gl_type;
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CoglBitmap target_bmp;
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CoglBitmap new_bmp;
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gboolean success;
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guchar *src;
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guchar *dst;
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gint y;
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/* Default to internal format if none specified */
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if (format == COGL_PIXEL_FORMAT_ANY)
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format = tex_2d->format;
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/* Rowstride from texture width if none specified */
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bpp = _cogl_get_format_bpp (format);
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if (rowstride == 0) rowstride = tex_2d->width * bpp;
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/* Return byte size if only that requested */
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byte_size = tex_2d->height * rowstride;
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if (data == NULL) return byte_size;
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closest_format =
|
|
_cogl_texture_driver_find_best_gl_get_data_format (format,
|
|
&closest_gl_format,
|
|
&closest_gl_type);
|
|
closest_bpp = _cogl_get_format_bpp (closest_format);
|
|
|
|
target_bmp.width = tex_2d->width;
|
|
target_bmp.height = tex_2d->height;
|
|
|
|
/* Is the requested format supported? */
|
|
if (closest_format == format)
|
|
{
|
|
/* Target user data directly */
|
|
target_bmp.format = format;
|
|
target_bmp.rowstride = rowstride;
|
|
target_bmp.data = data;
|
|
}
|
|
else
|
|
{
|
|
/* Target intermediate buffer */
|
|
target_bmp.format = closest_format;
|
|
target_bmp.rowstride = target_bmp.width * closest_bpp;
|
|
target_bmp.data = (guchar*) g_malloc (target_bmp.height
|
|
* target_bmp.rowstride);
|
|
}
|
|
|
|
GE( glBindTexture (GL_TEXTURE_2D, tex_2d->gl_texture) );
|
|
if (!_cogl_texture_driver_gl_get_tex_image (GL_TEXTURE_2D,
|
|
closest_gl_format,
|
|
closest_gl_type,
|
|
target_bmp.data))
|
|
{
|
|
/* XXX: In some cases _cogl_texture_2d_download_from_gl may
|
|
* fail to read back the texture data; such as for GLES which doesn't
|
|
* support glGetTexImage, so here we fallback to drawing the texture
|
|
* and reading the pixels from the framebuffer. */
|
|
_cogl_texture_draw_and_read (tex, &target_bmp,
|
|
closest_gl_format,
|
|
closest_gl_type);
|
|
}
|
|
|
|
/* Was intermediate used? */
|
|
if (closest_format != format)
|
|
{
|
|
/* Convert to requested format */
|
|
success = _cogl_bitmap_convert_and_premult (&target_bmp,
|
|
&new_bmp,
|
|
format);
|
|
|
|
/* Free intermediate data and return if failed */
|
|
g_free (target_bmp.data);
|
|
if (!success) return 0;
|
|
|
|
/* Copy to user buffer */
|
|
for (y = 0; y < new_bmp.height; ++y)
|
|
{
|
|
src = new_bmp.data + y * new_bmp.rowstride;
|
|
dst = data + y * rowstride;
|
|
memcpy (dst, src, new_bmp.width);
|
|
}
|
|
|
|
/* Free converted data */
|
|
g_free (new_bmp.data);
|
|
}
|
|
|
|
return byte_size;
|
|
}
|
|
|
|
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 gint
|
|
_cogl_texture_2d_get_width (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_2D (tex)->width;
|
|
}
|
|
|
|
static gint
|
|
_cogl_texture_2d_get_height (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_2D (tex)->height;
|
|
}
|
|
|
|
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_get_gl_texture,
|
|
_cogl_texture_2d_set_filters,
|
|
_cogl_texture_2d_ensure_mipmaps,
|
|
_cogl_texture_2d_set_wrap_mode_parameter,
|
|
_cogl_texture_2d_get_format,
|
|
_cogl_texture_2d_get_gl_format,
|
|
_cogl_texture_2d_get_width,
|
|
_cogl_texture_2d_get_height
|
|
};
|