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mutter/cogl/cogl-texture-rectangle.c
Neil Roberts 2c8bf00995 Don't define public cogl_is_* functions for internal types 
This adds a COGL_OBJECT_INTERNAL_DEFINE macro and friends that are the
same as COGL_OBJECT_DEFINE except that they prefix the cogl_is_*
function with an underscore so that it doesn't get exported in the
shared library.
2010-07-09 18:57:54 +01:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture-private.h"
#include "cogl-texture-rectangle-private.h"
#include "cogl-texture-driver.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-journal-private.h"
#include <string.h>
#include <math.h>
/* These aren't defined under GLES */
#ifndef GL_TEXTURE_RECTANGLE_ARB
#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
#endif
#ifndef GL_CLAMP
#define GL_CLAMP 0x2900
#endif
#ifndef GL_CLAMP_TO_BORDER
#define GL_CLAMP_TO_BORDER 0x812D
#endif
static void _cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect);
COGL_TEXTURE_INTERNAL_DEFINE (TextureRectangle, texture_rectangle);
static const CoglTextureVtable cogl_texture_rectangle_vtable;
typedef struct _CoglTextureRectangleManualRepeatData
{
CoglTextureRectangle *tex_rect;
CoglTextureSliceCallback callback;
void *user_data;
} CoglTextureRectangleManualRepeatData;
static void
_cogl_texture_rectangle_wrap_coords (float t_1, float t_2,
float *out_t_1, float *out_t_2)
{
float int_part;
/* Wrap t_1 and t_2 to the range [0,1] */
modff (t_1 < t_2 ? t_1 : t_2, &int_part);
t_1 -= int_part;
t_2 -= int_part;
if (cogl_util_float_signbit (int_part))
{
*out_t_1 = 1.0f + t_1;
*out_t_2 = 1.0f + t_2;
}
else
{
*out_t_1 = t_1;
*out_t_2 = t_2;
}
}
static void
_cogl_texture_rectangle_manual_repeat_cb (const float *coords,
void *user_data)
{
CoglTextureRectangleManualRepeatData *data = user_data;
float slice_coords[4];
_cogl_texture_rectangle_wrap_coords (coords[0], coords[2],
slice_coords + 0, slice_coords + 2);
_cogl_texture_rectangle_wrap_coords (coords[1], coords[3],
slice_coords + 1, slice_coords + 3);
slice_coords[0] *= data->tex_rect->width;
slice_coords[1] *= data->tex_rect->height;
slice_coords[2] *= data->tex_rect->width;
slice_coords[3] *= data->tex_rect->height;
data->callback (COGL_TEXTURE (data->tex_rect),
data->tex_rect->gl_texture,
GL_TEXTURE_RECTANGLE_ARB,
slice_coords,
coords,
data->user_data);
}
static void
_cogl_texture_rectangle_foreach_sub_texture_in_region (
CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglTextureSliceCallback callback,
void *user_data)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
CoglTextureRectangleManualRepeatData data;
data.tex_rect = tex_rect;
data.callback = callback;
data.user_data = user_data;
/* We need to implement manual repeating because if Cogl is calling
this function then it will set the wrap mode to GL_CLAMP_TO_EDGE
and hardware repeating can't be done */
_cogl_texture_iterate_manual_repeats
(_cogl_texture_rectangle_manual_repeat_cb,
virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2,
&data);
}
static gboolean
can_use_wrap_mode (GLenum wrap_mode)
{
return (wrap_mode == GL_CLAMP ||
wrap_mode == GL_CLAMP_TO_EDGE ||
wrap_mode == GL_CLAMP_TO_BORDER);
}
static void
_cogl_texture_rectangle_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_r)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
/* Only set the wrap mode if it's different from the current value
to avoid too many GL calls. Texture rectangle doesn't make use of
the r coordinate so we can ignore its wrap mode */
if (tex_rect->wrap_mode_s != wrap_mode_s ||
tex_rect->wrap_mode_t != wrap_mode_t)
{
g_assert (can_use_wrap_mode (wrap_mode_s));
g_assert (can_use_wrap_mode (wrap_mode_t));
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_S, wrap_mode_s) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_T, wrap_mode_t) );
tex_rect->wrap_mode_s = wrap_mode_s;
tex_rect->wrap_mode_t = wrap_mode_t;
}
}
static void
_cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect)
{
_cogl_delete_gl_texture (tex_rect->gl_texture);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_rect));
}
static gboolean
_cogl_texture_rectangle_can_create (unsigned int width,
unsigned int height,
CoglPixelFormat internal_format)
{
GLenum gl_intformat;
GLenum gl_type;
if (!cogl_features_available (COGL_FEATURE_TEXTURE_RECTANGLE))
return FALSE;
_cogl_pixel_format_to_gl (internal_format,
&gl_intformat,
NULL,
&gl_type);
/* Check that the driver can create a texture with that size */
if (!_cogl_texture_driver_size_supported (GL_TEXTURE_RECTANGLE_ARB,
gl_intformat,
gl_type,
width,
height))
return FALSE;
return TRUE;
}
static CoglTextureRectangle *
_cogl_texture_rectangle_create_base (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect = g_new (CoglTextureRectangle, 1);
CoglTexture *tex = COGL_TEXTURE (tex_rect);
tex->vtable = &cogl_texture_rectangle_vtable;
tex_rect->width = width;
tex_rect->height = height;
/* We default to GL_LINEAR for both filters */
tex_rect->min_filter = GL_LINEAR;
tex_rect->mag_filter = GL_LINEAR;
/* Wrap mode not yet set */
tex_rect->wrap_mode_s = GL_FALSE;
tex_rect->wrap_mode_t = GL_FALSE;
tex_rect->format = internal_format;
return tex_rect;
}
CoglHandle
_cogl_texture_rectangle_new_with_size (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
/* Since no data, we need some internal format */
if (internal_format == COGL_PIXEL_FORMAT_ANY)
internal_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
if (!_cogl_texture_rectangle_can_create (width, height, internal_format))
return COGL_INVALID_HANDLE;
internal_format = _cogl_pixel_format_to_gl (internal_format,
&gl_intformat,
&gl_format,
&gl_type);
tex_rect = _cogl_texture_rectangle_create_base (width, height, flags,
internal_format);
_cogl_texture_driver_gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
GE( glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL) );
return _cogl_texture_rectangle_handle_new (tex_rect);
}
CoglHandle
_cogl_texture_rectangle_new_from_bitmap (CoglHandle bmp_handle,
CoglTextureFlags flags,
CoglPixelFormat internal_format)
{
CoglTextureRectangle *tex_rect;
CoglBitmap *bmp = (CoglBitmap *)bmp_handle;
CoglBitmap dst_bmp;
gboolean dst_bmp_owner;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
g_return_val_if_fail (bmp_handle != COGL_INVALID_HANDLE, COGL_INVALID_HANDLE);
internal_format = _cogl_texture_determine_internal_format (bmp->format,
internal_format);
if (!_cogl_texture_rectangle_can_create (bmp->width, bmp->height,
internal_format))
return COGL_INVALID_HANDLE;
if (!_cogl_texture_prepare_for_upload (bmp,
internal_format,
&internal_format,
&dst_bmp,
&dst_bmp_owner,
&gl_intformat,
&gl_format,
&gl_type))
return COGL_INVALID_HANDLE;
tex_rect = _cogl_texture_rectangle_create_base (bmp->width,
bmp->height,
flags,
internal_format);
_cogl_texture_driver_gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
_cogl_texture_driver_upload_to_gl (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE,
&dst_bmp,
gl_intformat,
gl_format,
gl_type);
tex_rect->gl_format = gl_intformat;
if (dst_bmp_owner)
g_free (dst_bmp.data);
return _cogl_texture_rectangle_handle_new (tex_rect);
}
static int
_cogl_texture_rectangle_get_max_waste (CoglTexture *tex)
{
return -1;
}
static gboolean
_cogl_texture_rectangle_is_sliced (CoglTexture *tex)
{
return FALSE;
}
static gboolean
_cogl_texture_rectangle_can_hardware_repeat (CoglTexture *tex)
{
return FALSE;
}
static void
_cogl_texture_rectangle_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
*s *= tex_rect->width;
*t *= tex_rect->height;
}
static CoglTransformResult
_cogl_texture_rectangle_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
gboolean need_repeat = FALSE;
int i;
for (i = 0; i < 4; i++)
{
if (coords[i] < 0.0f || coords[i] > 1.0f)
need_repeat = TRUE;
coords[i] *= (i & 1) ? tex_rect->height : tex_rect->width;
}
return (need_repeat ? COGL_TRANSFORM_SOFTWARE_REPEAT
: COGL_TRANSFORM_NO_REPEAT);
}
static gboolean
_cogl_texture_rectangle_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
if (out_gl_handle)
*out_gl_handle = tex_rect->gl_texture;
if (out_gl_target)
*out_gl_target = GL_TEXTURE_RECTANGLE_ARB;
return TRUE;
}
static void
_cogl_texture_rectangle_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
if (min_filter == tex_rect->min_filter
&& mag_filter == tex_rect->mag_filter)
return;
/* Rectangle textures don't support mipmapping */
g_assert (min_filter == GL_LINEAR || min_filter == GL_NEAREST);
/* Store new values */
tex_rect->min_filter = min_filter;
tex_rect->mag_filter = mag_filter;
/* Apply new filters to the texture */
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
mag_filter) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
min_filter) );
}
static void
_cogl_texture_rectangle_pre_paint (CoglTexture *tex,
CoglTexturePrePaintFlags flags)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Rectangle textures don't support mipmaps */
g_assert ((flags & COGL_TEXTURE_NEEDS_MIPMAP) == 0);
}
static void
_cogl_texture_rectangle_ensure_non_quad_rendering (CoglTexture *tex)
{
/* Nothing needs to be done */
}
static gboolean
_cogl_texture_rectangle_set_region (CoglTexture *tex,
int src_x,
int src_y,
int dst_x,
int dst_y,
unsigned int dst_width,
unsigned int dst_height,
CoglBitmap *bmp)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
GLenum gl_format;
GLenum gl_type;
_cogl_pixel_format_to_gl (bmp->format,
NULL, /* internal format */
&gl_format,
&gl_type);
/* Send data to GL */
_cogl_texture_driver_upload_subregion_to_gl (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE,
src_x, src_y,
dst_x, dst_y,
dst_width, dst_height,
bmp,
gl_format,
gl_type);
return TRUE;
}
static gboolean
_cogl_texture_rectangle_get_data (CoglTexture *tex,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data)
{
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
int bpp;
GLenum gl_format;
GLenum gl_type;
bpp = _cogl_get_format_bpp (format);
_cogl_pixel_format_to_gl (format,
NULL, /* internal format */
&gl_format,
&gl_type);
_cogl_texture_driver_prep_gl_for_pixels_download (rowstride, bpp);
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
return _cogl_texture_driver_gl_get_tex_image (GL_TEXTURE_RECTANGLE_ARB,
gl_format,
gl_type,
data);
}
static CoglPixelFormat
_cogl_texture_rectangle_get_format (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->format;
}
static GLenum
_cogl_texture_rectangle_get_gl_format (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->gl_format;
}
static int
_cogl_texture_rectangle_get_width (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->width;
}
static int
_cogl_texture_rectangle_get_height (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->height;
}
static const CoglTextureVtable
cogl_texture_rectangle_vtable =
{
_cogl_texture_rectangle_set_region,
_cogl_texture_rectangle_get_data,
_cogl_texture_rectangle_foreach_sub_texture_in_region,
_cogl_texture_rectangle_get_max_waste,
_cogl_texture_rectangle_is_sliced,
_cogl_texture_rectangle_can_hardware_repeat,
_cogl_texture_rectangle_transform_coords_to_gl,
_cogl_texture_rectangle_transform_quad_coords_to_gl,
_cogl_texture_rectangle_get_gl_texture,
_cogl_texture_rectangle_set_filters,
_cogl_texture_rectangle_pre_paint,
_cogl_texture_rectangle_ensure_non_quad_rendering,
_cogl_texture_rectangle_set_wrap_mode_parameters,
_cogl_texture_rectangle_get_format,
_cogl_texture_rectangle_get_gl_format,
_cogl_texture_rectangle_get_width,
_cogl_texture_rectangle_get_height,
NULL /* is_foreign */
};
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