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82e63a4753
Instead of the ensure_mipmaps virtual that is only called whenever the texture is about to be rendered with a min filter that needs the mipmap, there is now a pre_paint virtual that is always called when the texture is about to be painted in any way. It has a flags parameter which is used to specify whether the mipmap will be needed. This is useful for CoglTexturePixmapX11 because it needs to do stuff before painting that is unrelated to mipmapping.
564 lines
18 KiB
C
564 lines
18 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) 2009,2010 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, see <http://www.gnu.org/licenses/>.
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*
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*
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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-sub-texture-private.h"
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#include "cogl-context.h"
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#include "cogl-handle.h"
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#include "cogl-texture-driver.h"
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#include <string.h>
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#include <math.h>
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static void _cogl_sub_texture_free (CoglSubTexture *sub_tex);
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COGL_TEXTURE_DEFINE (SubTexture, sub_texture);
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static const CoglTextureVtable cogl_sub_texture_vtable;
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static void
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_cogl_sub_texture_map_range (float *t1, float *t2,
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int sub_offset,
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int sub_size,
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int full_size)
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{
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float t1_frac, t1_int, t2_frac, t2_int;
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t1_frac = modff (*t1, &t1_int);
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t2_frac = modff (*t2, &t2_int);
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if (t1_frac < 0.0f)
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{
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t1_frac += 1.0f;
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t1_int -= 1.0f;
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}
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if (t2_frac < 0.0f)
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{
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t2_frac += 1.0f;
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t2_int -= 1.0f;
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}
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/* If one of the coordinates is zero we need to make sure it is
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still greater than the other coordinate if it was originally so
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we'll flip it to the other side */
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if (*t1 < *t2)
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{
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if (t2_frac == 0.0f)
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{
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t2_frac = 1.0f;
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t2_int -= 1.0f;
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}
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}
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else
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{
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if (t1_frac == 0.0f)
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{
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t1_frac = 1.0f;
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t1_int -= 1.0f;
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}
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}
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/* Convert the fractional part leaving the integer part intact */
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t1_frac = (sub_offset + t1_frac * sub_size) / full_size;
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*t1 = t1_frac + t1_int;
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t2_frac = (sub_offset + t2_frac * sub_size) / full_size;
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*t2 = t2_frac + t2_int;
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}
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static void
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_cogl_sub_texture_map_quad (CoglSubTexture *sub_tex,
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float *coords)
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{
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unsigned int full_width = cogl_texture_get_width (sub_tex->full_texture);
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unsigned int full_height = cogl_texture_get_height (sub_tex->full_texture);
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_cogl_sub_texture_map_range (coords + 0, coords + 2,
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sub_tex->sub_x, sub_tex->sub_width,
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full_width);
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_cogl_sub_texture_map_range (coords + 1, coords + 3,
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sub_tex->sub_y, sub_tex->sub_height,
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full_height);
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}
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/* Maps from the texture coordinates of the full texture to the
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texture coordinates of the sub texture */
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static float
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_cogl_sub_texture_unmap_coord (float t,
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int sub_offset,
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int sub_size,
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int full_size)
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{
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float frac_part, int_part;
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/* Convert the fractional part leaving the integer part in tact */
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frac_part = modff (t, &int_part);
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if (cogl_util_float_signbit (frac_part))
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frac_part = ((1.0f + frac_part) * full_size -
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sub_offset - sub_size) / sub_size;
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else
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frac_part = (frac_part * full_size - sub_offset) / sub_size;
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return frac_part + int_part;
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}
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static void
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_cogl_sub_texture_unmap_coords (CoglSubTexture *sub_tex,
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float *s,
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float *t)
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{
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unsigned int full_width = cogl_texture_get_width (sub_tex->full_texture);
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unsigned int full_height = cogl_texture_get_height (sub_tex->full_texture);
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*s = _cogl_sub_texture_unmap_coord (*s, sub_tex->sub_x, sub_tex->sub_width,
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full_width);
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*t = _cogl_sub_texture_unmap_coord (*t, sub_tex->sub_y, sub_tex->sub_height,
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full_height);
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}
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typedef struct _CoglSubTextureForeachData
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{
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CoglSubTexture *sub_tex;
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CoglTextureSliceCallback callback;
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void *user_data;
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} CoglSubTextureForeachData;
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static void
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_cogl_sub_texture_foreach_cb (CoglHandle handle,
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GLuint gl_handle,
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GLenum gl_target,
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const float *slice_coords,
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const float *full_virtual_coords,
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void *user_data)
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{
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CoglSubTextureForeachData *data = user_data;
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float virtual_coords[4];
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memcpy (virtual_coords, full_virtual_coords, sizeof (virtual_coords));
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/* Convert the virtual coords from the full-texture space to the sub
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texture space */
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_cogl_sub_texture_unmap_coords (data->sub_tex,
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&virtual_coords[0],
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&virtual_coords[1]);
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_cogl_sub_texture_unmap_coords (data->sub_tex,
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&virtual_coords[2],
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&virtual_coords[3]);
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data->callback (handle, gl_handle, gl_target,
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slice_coords, virtual_coords,
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data->user_data);
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}
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static void
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_cogl_sub_texture_manual_repeat_cb (const float *coords,
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void *user_data)
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{
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CoglSubTextureForeachData *data = user_data;
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float mapped_coords[4];
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memcpy (mapped_coords, coords, sizeof (mapped_coords));
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_cogl_sub_texture_map_quad (data->sub_tex, mapped_coords);
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_cogl_texture_foreach_sub_texture_in_region (data->sub_tex->full_texture,
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mapped_coords[0],
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mapped_coords[1],
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mapped_coords[2],
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mapped_coords[3],
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_cogl_sub_texture_foreach_cb,
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user_data);
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}
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static void
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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CoglSubTextureForeachData data;
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data.sub_tex = sub_tex;
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data.callback = callback;
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data.user_data = user_data;
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_cogl_texture_iterate_manual_repeats (_cogl_sub_texture_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_sub_texture_set_wrap_mode_parameters (CoglTexture *tex,
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GLenum wrap_mode_s,
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GLenum wrap_mode_t,
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GLenum wrap_mode_r)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_set_wrap_mode_parameters (sub_tex->full_texture,
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wrap_mode_s,
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wrap_mode_t,
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wrap_mode_r);
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}
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static void
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_cogl_sub_texture_free (CoglSubTexture *sub_tex)
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{
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cogl_handle_unref (sub_tex->next_texture);
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cogl_handle_unref (sub_tex->full_texture);
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/* Chain up */
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_cogl_texture_free (COGL_TEXTURE (sub_tex));
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}
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CoglHandle
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_cogl_sub_texture_new (CoglHandle next_texture,
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int sub_x, int sub_y,
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int sub_width, int sub_height)
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{
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CoglHandle full_texture;
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CoglSubTexture *sub_tex;
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CoglTexture *tex;
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unsigned int next_width, next_height;
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next_width = cogl_texture_get_width (next_texture);
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next_height = cogl_texture_get_height (next_texture);
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/* The region must specify a non-zero subset of the full texture */
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g_return_val_if_fail (sub_x >= 0 && sub_y >= 0, COGL_INVALID_HANDLE);
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g_return_val_if_fail (sub_width > 0 && sub_height > 0, COGL_INVALID_HANDLE);
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g_return_val_if_fail (sub_x + sub_width <= next_width, COGL_INVALID_HANDLE);
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g_return_val_if_fail (sub_y + sub_height <= next_height, COGL_INVALID_HANDLE);
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sub_tex = g_new (CoglSubTexture, 1);
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tex = COGL_TEXTURE (sub_tex);
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tex->vtable = &cogl_sub_texture_vtable;
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/* If the next texture is also a sub texture we can avoid one level
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of indirection by referencing the full texture of that texture
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instead. */
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if (cogl_is_sub_texture (next_texture))
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{
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CoglSubTexture *other_sub_tex =
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_cogl_sub_texture_pointer_from_handle (next_texture);
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full_texture = other_sub_tex->full_texture;
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sub_x += other_sub_tex->sub_x;
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sub_y += other_sub_tex->sub_y;
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}
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else
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full_texture = next_texture;
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sub_tex->next_texture = cogl_handle_ref (next_texture);
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sub_tex->full_texture = cogl_handle_ref (full_texture);
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sub_tex->sub_x = sub_x;
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sub_tex->sub_y = sub_y;
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sub_tex->sub_width = sub_width;
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sub_tex->sub_height = sub_height;
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return _cogl_sub_texture_handle_new (sub_tex);
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}
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static int
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_cogl_sub_texture_get_max_waste (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_get_max_waste (sub_tex->full_texture);
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}
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static gboolean
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_cogl_sub_texture_is_sliced (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_is_sliced (sub_tex->full_texture);
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}
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static gboolean
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_cogl_sub_texture_can_hardware_repeat (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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/* We can hardware repeat if the subtexture actually represents all of the
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of the full texture */
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return (sub_tex->sub_width ==
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cogl_texture_get_width (sub_tex->full_texture) &&
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sub_tex->sub_height ==
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cogl_texture_get_height (sub_tex->full_texture) &&
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_cogl_texture_can_hardware_repeat (sub_tex->full_texture));
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}
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static void
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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/* This won't work if the sub texture is not the size of the full
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texture and the coordinates are outside the range [0,1] */
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*s = ((*s * sub_tex->sub_width + sub_tex->sub_x) /
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cogl_texture_get_width (sub_tex->full_texture));
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*t = ((*t * sub_tex->sub_height + sub_tex->sub_y) /
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cogl_texture_get_height (sub_tex->full_texture));
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_cogl_texture_transform_coords_to_gl (sub_tex->full_texture, s, t);
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}
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static CoglTransformResult
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_cogl_sub_texture_transform_quad_coords_to_gl (CoglTexture *tex,
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float *coords)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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int i;
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/* We can't support repeating with this method. In this case
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cogl-primitives will resort to manual repeating */
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for (i = 0; i < 4; i++)
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if (coords[i] < 0.0f || coords[i] > 1.0f)
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return COGL_TRANSFORM_SOFTWARE_REPEAT;
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_cogl_sub_texture_map_quad (sub_tex, coords);
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return _cogl_texture_transform_quad_coords_to_gl (sub_tex->full_texture,
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coords);
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}
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static gboolean
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_get_gl_texture (sub_tex->full_texture,
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out_gl_handle,
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out_gl_target);
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}
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static void
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_set_filters (sub_tex->full_texture, min_filter, mag_filter);
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}
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static void
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_cogl_sub_texture_pre_paint (CoglTexture *tex,
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CoglTexturePrePaintFlags flags)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_pre_paint (sub_tex->full_texture, flags);
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}
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static void
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_cogl_sub_texture_ensure_non_quad_rendering (CoglTexture *tex)
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{
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}
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static gboolean
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_set_region (sub_tex->full_texture,
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src_x, src_y,
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dst_x + sub_tex->sub_x,
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dst_y + sub_tex->sub_y,
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dst_width, dst_height,
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width, height,
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format,
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rowstride,
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data);
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}
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static void
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_cogl_sub_texture_copy_region (guint8 *dst,
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const guint8 *src,
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int dst_x, int dst_y,
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int src_x, int src_y,
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int width, int height,
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int dst_rowstride,
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int src_rowstride,
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int bpp)
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{
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int y;
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dst += dst_x * bpp + dst_y * dst_rowstride;
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src += src_x * bpp + src_y * src_rowstride;
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for (y = 0; y < height; y++)
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{
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memcpy (dst, src, bpp * width);
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dst += dst_rowstride;
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src += src_rowstride;
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}
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}
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static int
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_cogl_sub_texture_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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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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unsigned int full_rowstride;
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guint8 *full_data;
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int byte_size, full_size;
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int bpp;
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int full_tex_width, full_tex_height;
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/* FIXME: This gets the full data from the full texture and then
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copies a subregion of that. It would be better if there was a
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texture_get_sub_data virtual and it can just munge the texture
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coordinates */
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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 = cogl_texture_get_format (sub_tex->full_texture);
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full_tex_width = cogl_texture_get_width (sub_tex->full_texture);
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full_tex_height = cogl_texture_get_height (sub_tex->full_texture);
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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)
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rowstride = sub_tex->sub_width * bpp;
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/* Return byte size if only that requested */
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byte_size = sub_tex->sub_height * rowstride;
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if (data == NULL)
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return byte_size;
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full_rowstride = _cogl_get_format_bpp (format) * full_tex_width;
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full_data = g_malloc (full_rowstride * full_tex_height);
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full_size = cogl_texture_get_data (sub_tex->full_texture, format,
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full_rowstride, full_data);
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if (full_size)
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_cogl_sub_texture_copy_region (data, full_data,
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0, 0,
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sub_tex->sub_x,
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sub_tex->sub_y,
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sub_tex->sub_width,
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sub_tex->sub_height,
|
|
rowstride,
|
|
full_rowstride,
|
|
bpp);
|
|
else
|
|
byte_size = 0;
|
|
|
|
g_free (full_data);
|
|
|
|
return byte_size;
|
|
}
|
|
|
|
static CoglPixelFormat
|
|
_cogl_sub_texture_get_format (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return cogl_texture_get_format (sub_tex->full_texture);
|
|
}
|
|
|
|
static GLenum
|
|
_cogl_sub_texture_get_gl_format (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return _cogl_texture_get_gl_format (sub_tex->full_texture);
|
|
}
|
|
|
|
static int
|
|
_cogl_sub_texture_get_width (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return sub_tex->sub_width;
|
|
}
|
|
|
|
static int
|
|
_cogl_sub_texture_get_height (CoglTexture *tex)
|
|
{
|
|
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
|
|
|
|
return sub_tex->sub_height;
|
|
}
|
|
|
|
static const CoglTextureVtable
|
|
cogl_sub_texture_vtable =
|
|
{
|
|
_cogl_sub_texture_set_region,
|
|
_cogl_sub_texture_get_data,
|
|
_cogl_sub_texture_foreach_sub_texture_in_region,
|
|
_cogl_sub_texture_get_max_waste,
|
|
_cogl_sub_texture_is_sliced,
|
|
_cogl_sub_texture_can_hardware_repeat,
|
|
_cogl_sub_texture_transform_coords_to_gl,
|
|
_cogl_sub_texture_transform_quad_coords_to_gl,
|
|
_cogl_sub_texture_get_gl_texture,
|
|
_cogl_sub_texture_set_filters,
|
|
_cogl_sub_texture_pre_paint,
|
|
_cogl_sub_texture_ensure_non_quad_rendering,
|
|
_cogl_sub_texture_set_wrap_mode_parameters,
|
|
_cogl_sub_texture_get_format,
|
|
_cogl_sub_texture_get_gl_format,
|
|
_cogl_sub_texture_get_width,
|
|
_cogl_sub_texture_get_height,
|
|
NULL /* is_foreign */
|
|
};
|