b72f255c0a
Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
594 lines
19 KiB
C
594 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) 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-texture-rectangle-private.h"
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#include "cogl-texture-driver.h"
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#include "cogl-context-private.h"
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#include "cogl-handle.h"
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#include "cogl-journal-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#include <string.h>
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#include <math.h>
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/* These aren't defined under GLES */
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#ifndef GL_TEXTURE_RECTANGLE_ARB
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#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
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#endif
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#ifndef GL_CLAMP
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#define GL_CLAMP 0x2900
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#endif
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#ifndef GL_CLAMP_TO_BORDER
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#define GL_CLAMP_TO_BORDER 0x812D
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#endif
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static void _cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect);
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COGL_TEXTURE_INTERNAL_DEFINE (TextureRectangle, texture_rectangle);
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static const CoglTextureVtable cogl_texture_rectangle_vtable;
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static gboolean
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can_use_wrap_mode (GLenum wrap_mode)
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{
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return (wrap_mode == GL_CLAMP ||
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wrap_mode == GL_CLAMP_TO_EDGE ||
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wrap_mode == GL_CLAMP_TO_BORDER);
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}
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static void
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_cogl_texture_rectangle_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_p)
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{
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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* Only set the wrap mode if it's different from the current value
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to avoid too many GL calls. Texture rectangle doesn't make use of
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the r coordinate so we can ignore its wrap mode */
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if (tex_rect->wrap_mode_s != wrap_mode_s ||
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tex_rect->wrap_mode_t != wrap_mode_t)
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{
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g_assert (can_use_wrap_mode (wrap_mode_s));
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g_assert (can_use_wrap_mode (wrap_mode_t));
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_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
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tex_rect->gl_texture,
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tex_rect->is_foreign);
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GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
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GL_TEXTURE_WRAP_S, wrap_mode_s) );
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GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
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GL_TEXTURE_WRAP_T, wrap_mode_t) );
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tex_rect->wrap_mode_s = wrap_mode_s;
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tex_rect->wrap_mode_t = wrap_mode_t;
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}
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}
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static void
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_cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect)
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{
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if (!tex_rect->is_foreign)
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_cogl_delete_gl_texture (tex_rect->gl_texture);
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/* Chain up */
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_cogl_texture_free (COGL_TEXTURE (tex_rect));
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}
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static gboolean
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_cogl_texture_rectangle_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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_COGL_GET_CONTEXT (ctx, FALSE);
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if (!cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_RECTANGLE))
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return FALSE;
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ctx->texture_driver->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 (!ctx->texture_driver->size_supported (GL_TEXTURE_RECTANGLE_ARB,
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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 CoglTextureRectangle *
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_cogl_texture_rectangle_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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CoglTextureRectangle *tex_rect = g_new (CoglTextureRectangle, 1);
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CoglTexture *tex = COGL_TEXTURE (tex_rect);
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_cogl_texture_init (tex, &cogl_texture_rectangle_vtable);
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tex_rect->width = width;
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tex_rect->height = height;
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/* We default to GL_LINEAR for both filters */
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tex_rect->min_filter = GL_LINEAR;
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tex_rect->mag_filter = GL_LINEAR;
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/* Wrap mode not yet set */
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tex_rect->wrap_mode_s = GL_FALSE;
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tex_rect->wrap_mode_t = GL_FALSE;
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tex_rect->format = internal_format;
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return tex_rect;
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}
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CoglHandle
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_cogl_texture_rectangle_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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CoglTextureRectangle *tex_rect;
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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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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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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_rectangle_can_create (width, height, internal_format))
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return COGL_INVALID_HANDLE;
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internal_format = ctx->texture_driver->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_rect = _cogl_texture_rectangle_create_base (width, height, flags,
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internal_format);
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ctx->texture_driver->gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
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_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
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tex_rect->gl_texture,
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tex_rect->is_foreign);
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GE( ctx, glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_intformat,
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width, height, 0, gl_format, gl_type, NULL) );
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return _cogl_texture_rectangle_handle_new (tex_rect);
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}
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CoglHandle
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_cogl_texture_rectangle_new_from_bitmap (CoglBitmap *bmp,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format)
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{
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CoglTextureRectangle *tex_rect;
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CoglBitmap *dst_bmp;
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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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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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_COGL_RETURN_VAL_IF_FAIL (cogl_is_bitmap (bmp), COGL_INVALID_HANDLE);
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internal_format =
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_cogl_texture_determine_internal_format (_cogl_bitmap_get_format (bmp),
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internal_format);
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if (!_cogl_texture_rectangle_can_create (_cogl_bitmap_get_width (bmp),
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_cogl_bitmap_get_height (bmp),
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internal_format))
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return COGL_INVALID_HANDLE;
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dst_bmp = _cogl_texture_prepare_for_upload (bmp,
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internal_format,
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&internal_format,
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&gl_intformat,
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&gl_format,
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&gl_type);
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if (dst_bmp == NULL)
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return COGL_INVALID_HANDLE;
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tex_rect = _cogl_texture_rectangle_create_base (_cogl_bitmap_get_width (bmp),
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_cogl_bitmap_get_height (bmp),
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flags,
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internal_format);
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ctx->texture_driver->gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
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ctx->texture_driver->upload_to_gl (GL_TEXTURE_RECTANGLE_ARB,
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tex_rect->gl_texture,
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FALSE,
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dst_bmp,
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gl_intformat,
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gl_format,
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gl_type);
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tex_rect->gl_format = gl_intformat;
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cogl_object_unref (dst_bmp);
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return _cogl_texture_rectangle_handle_new (tex_rect);
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}
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CoglHandle
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_cogl_texture_rectangle_new_from_foreign (GLuint gl_handle,
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GLuint width,
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GLuint height,
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CoglPixelFormat format)
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{
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/* NOTE: width, height and internal format are not queriable
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* in GLES, hence such a function prototype.
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*/
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GLenum gl_error = 0;
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GLint gl_compressed = GL_FALSE;
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GLenum gl_int_format = 0;
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CoglTextureRectangle *tex_rect;
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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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if (!ctx->texture_driver->allows_foreign_gl_target (GL_TEXTURE_RECTANGLE_ARB))
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return COGL_INVALID_HANDLE;
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/* Make sure it is a valid GL texture object */
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if (!ctx->glIsTexture (gl_handle))
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return COGL_INVALID_HANDLE;
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/* Make sure binding succeeds */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB, gl_handle, TRUE);
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if (ctx->glGetError () != GL_NO_ERROR)
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return COGL_INVALID_HANDLE;
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/* Obtain texture parameters */
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#if HAVE_COGL_GL
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if (ctx->driver == COGL_DRIVER_GL)
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{
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GLint val;
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GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
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GL_TEXTURE_COMPRESSED,
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&gl_compressed) );
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GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
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GL_TEXTURE_INTERNAL_FORMAT,
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&val) );
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gl_int_format = val;
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/* If we can query GL for the actual pixel format then we'll ignore
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the passed in format and use that. */
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if (!ctx->texture_driver->pixel_format_from_gl_internal (gl_int_format,
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&format))
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return COGL_INVALID_HANDLE;
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}
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else
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#endif
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{
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/* Otherwise we'll assume we can derive the GL format from the
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passed in format */
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ctx->texture_driver->pixel_format_to_gl (format,
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&gl_int_format,
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NULL,
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NULL);
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}
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/* Note: We always trust the given width and height without querying
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* the texture object because the user may be creating a Cogl
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* texture for a texture_from_pixmap object where glTexImage2D may
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* not have been called and the texture_from_pixmap spec doesn't
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* clarify that it is reliable to query back the size from OpenGL.
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*/
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/* Validate width and height */
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if (width <= 0 || height <= 0)
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return COGL_INVALID_HANDLE;
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/* Compressed texture images not supported */
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if (gl_compressed == GL_TRUE)
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return COGL_INVALID_HANDLE;
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/* Create new texture */
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tex_rect = _cogl_texture_rectangle_create_base (width, height,
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COGL_TEXTURE_NO_AUTO_MIPMAP,
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format);
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/* Setup bitmap info */
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tex_rect->is_foreign = TRUE;
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tex_rect->format = format;
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tex_rect->gl_texture = gl_handle;
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tex_rect->gl_format = gl_int_format;
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/* Unknown filter */
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tex_rect->min_filter = GL_FALSE;
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tex_rect->mag_filter = GL_FALSE;
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return _cogl_texture_rectangle_handle_new (tex_rect);
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}
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static int
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_cogl_texture_rectangle_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_rectangle_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_rectangle_can_hardware_repeat (CoglTexture *tex)
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{
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return FALSE;
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}
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static void
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_cogl_texture_rectangle_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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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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*s *= tex_rect->width;
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*t *= tex_rect->height;
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}
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static CoglTransformResult
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_cogl_texture_rectangle_transform_quad_coords_to_gl (CoglTexture *tex,
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float *coords)
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{
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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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gboolean need_repeat = FALSE;
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int i;
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for (i = 0; i < 4; i++)
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{
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if (coords[i] < 0.0f || coords[i] > 1.0f)
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need_repeat = TRUE;
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coords[i] *= (i & 1) ? tex_rect->height : tex_rect->width;
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}
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return (need_repeat ? COGL_TRANSFORM_SOFTWARE_REPEAT
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: COGL_TRANSFORM_NO_REPEAT);
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}
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static gboolean
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_cogl_texture_rectangle_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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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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if (out_gl_handle)
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*out_gl_handle = tex_rect->gl_texture;
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if (out_gl_target)
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*out_gl_target = GL_TEXTURE_RECTANGLE_ARB;
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return TRUE;
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}
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static void
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_cogl_texture_rectangle_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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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (min_filter == tex_rect->min_filter
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&& mag_filter == tex_rect->mag_filter)
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return;
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/* Rectangle textures don't support mipmapping */
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g_assert (min_filter == GL_LINEAR || min_filter == GL_NEAREST);
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/* Store new values */
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tex_rect->min_filter = min_filter;
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tex_rect->mag_filter = mag_filter;
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/* Apply new filters to the texture */
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_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
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tex_rect->gl_texture,
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tex_rect->is_foreign);
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GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
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mag_filter) );
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GE( ctx, glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
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min_filter) );
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}
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static void
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_cogl_texture_rectangle_pre_paint (CoglTexture *tex,
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CoglTexturePrePaintFlags flags)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* Rectangle textures don't support mipmaps */
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g_assert ((flags & COGL_TEXTURE_NEEDS_MIPMAP) == 0);
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}
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static void
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_cogl_texture_rectangle_ensure_non_quad_rendering (CoglTexture *tex)
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{
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/* Nothing needs to be done */
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}
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static gboolean
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_cogl_texture_rectangle_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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CoglBitmap *bmp)
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{
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CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
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GLenum gl_format;
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GLenum gl_type;
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_COGL_GET_CONTEXT (ctx, FALSE);
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bmp = _cogl_texture_prepare_for_upload (bmp,
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cogl_texture_get_format (tex),
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NULL,
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NULL,
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&gl_format,
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&gl_type);
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/* Send data to GL */
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ctx->texture_driver->upload_subregion_to_gl (GL_TEXTURE_RECTANGLE_ARB,
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tex_rect->gl_texture,
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FALSE,
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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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bmp,
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gl_format,
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gl_type);
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cogl_object_unref (bmp);
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return TRUE;
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}
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static gboolean
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_cogl_texture_rectangle_get_data (CoglTexture *tex,
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CoglPixelFormat format,
|
|
unsigned int rowstride,
|
|
guint8 *data)
|
|
{
|
|
CoglTextureRectangle *tex_rect = COGL_TEXTURE_RECTANGLE (tex);
|
|
int bpp;
|
|
GLenum gl_format;
|
|
GLenum gl_type;
|
|
|
|
_COGL_GET_CONTEXT (ctx, FALSE);
|
|
|
|
bpp = _cogl_get_format_bpp (format);
|
|
|
|
ctx->texture_driver->pixel_format_to_gl (format,
|
|
NULL, /* internal format */
|
|
&gl_format,
|
|
&gl_type);
|
|
|
|
ctx->texture_driver->prep_gl_for_pixels_download (rowstride, bpp);
|
|
|
|
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
|
|
tex_rect->gl_texture,
|
|
tex_rect->is_foreign);
|
|
return ctx->texture_driver->gl_get_tex_image (GL_TEXTURE_RECTANGLE_ARB,
|
|
gl_format,
|
|
gl_type,
|
|
data);
|
|
}
|
|
|
|
static CoglPixelFormat
|
|
_cogl_texture_rectangle_get_format (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_RECTANGLE (tex)->format;
|
|
}
|
|
|
|
static GLenum
|
|
_cogl_texture_rectangle_get_gl_format (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_RECTANGLE (tex)->gl_format;
|
|
}
|
|
|
|
static int
|
|
_cogl_texture_rectangle_get_width (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_RECTANGLE (tex)->width;
|
|
}
|
|
|
|
static int
|
|
_cogl_texture_rectangle_get_height (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_RECTANGLE (tex)->height;
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_texture_rectangle_is_foreign (CoglTexture *tex)
|
|
{
|
|
return COGL_TEXTURE_RECTANGLE (tex)->is_foreign;
|
|
}
|
|
|
|
static const CoglTextureVtable
|
|
cogl_texture_rectangle_vtable =
|
|
{
|
|
_cogl_texture_rectangle_set_region,
|
|
_cogl_texture_rectangle_get_data,
|
|
NULL, /* foreach_sub_texture_in_region */
|
|
_cogl_texture_rectangle_get_max_waste,
|
|
_cogl_texture_rectangle_is_sliced,
|
|
_cogl_texture_rectangle_can_hardware_repeat,
|
|
_cogl_texture_rectangle_transform_coords_to_gl,
|
|
_cogl_texture_rectangle_transform_quad_coords_to_gl,
|
|
_cogl_texture_rectangle_get_gl_texture,
|
|
_cogl_texture_rectangle_set_filters,
|
|
_cogl_texture_rectangle_pre_paint,
|
|
_cogl_texture_rectangle_ensure_non_quad_rendering,
|
|
_cogl_texture_rectangle_set_wrap_mode_parameters,
|
|
_cogl_texture_rectangle_get_format,
|
|
_cogl_texture_rectangle_get_gl_format,
|
|
_cogl_texture_rectangle_get_width,
|
|
_cogl_texture_rectangle_get_height,
|
|
_cogl_texture_rectangle_is_foreign
|
|
};
|