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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.
257 lines
9.5 KiB
C
257 lines
9.5 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) 2007,2008,2009 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, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_TEXTURE_PRIVATE_H
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#define __COGL_TEXTURE_PRIVATE_H
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#include "cogl-bitmap-private.h"
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#include "cogl-handle.h"
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#include "cogl-material-private.h"
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#define COGL_TEXTURE(tex) ((CoglTexture *)(tex))
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typedef struct _CoglTexture CoglTexture;
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typedef struct _CoglTextureVtable CoglTextureVtable;
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typedef void (*CoglTextureSliceCallback) (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 *virtual_coords,
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void *user_data);
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typedef void (* CoglTextureManualRepeatCallback) (const float *coords,
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void *user_data);
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/* Encodes three possibiloities result of transforming a quad */
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typedef enum {
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/* quad doesn't cross the boundaries of a texture */
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COGL_TRANSFORM_NO_REPEAT,
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/* quad crosses boundaries, hardware wrap mode can handle */
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COGL_TRANSFORM_HARDWARE_REPEAT,
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/* quad crosses boundaries, needs software fallback;
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* for a sliced texture, this might not actually involve
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* repeating, just a quad crossing multiple slices */
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COGL_TRANSFORM_SOFTWARE_REPEAT,
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} CoglTransformResult;
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/* Flags given to the pre_paint method */
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typedef enum {
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/* The texture is going to be used with filters that require
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mipmapping. This gives the texture the opportunity to
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automatically update the mipmap tree */
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COGL_TEXTURE_NEEDS_MIPMAP = 1
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} CoglTexturePrePaintFlags;
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struct _CoglTextureVtable
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{
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/* Virtual functions that must be implemented for a texture
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backend */
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gboolean (* 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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int (* 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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void (* foreach_sub_texture_in_region) (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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int (* get_max_waste) (CoglTexture *tex);
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gboolean (* is_sliced) (CoglTexture *tex);
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gboolean (* can_hardware_repeat) (CoglTexture *tex);
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void (* transform_coords_to_gl) (CoglTexture *tex,
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float *s,
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float *t);
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CoglTransformResult (* transform_quad_coords_to_gl) (CoglTexture *tex,
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float *coords);
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gboolean (* 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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void (* set_filters) (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter);
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void (* pre_paint) (CoglTexture *tex, CoglTexturePrePaintFlags flags);
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void (* ensure_non_quad_rendering) (CoglTexture *tex);
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void (* 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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CoglPixelFormat (* get_format) (CoglTexture *tex);
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GLenum (* get_gl_format) (CoglTexture *tex);
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int (* get_width) (CoglTexture *tex);
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int (* get_height) (CoglTexture *tex);
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gboolean (* is_foreign) (CoglTexture *tex);
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};
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struct _CoglTexture
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{
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CoglHandleObject _parent;
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const CoglTextureVtable *vtable;
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};
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typedef enum _CoglTextureChangeFlags
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{
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/* Whenever the internals of a texture are changed such that the
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* underlying GL textures that represent the CoglTexture change then
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* we notify cogl-material.c via
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* _cogl_material_texture_pre_change_notify
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*/
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COGL_TEXTURE_CHANGE_GL_TEXTURES
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} CoglTextureChangeFlags;
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void
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_cogl_texture_free (CoglTexture *texture);
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/* This is used to register a type to the list of handle types that
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will be considered a texture in cogl_is_texture() */
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void
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_cogl_texture_register_texture_type (GQuark type);
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#define COGL_TEXTURE_DEFINE(TypeName, type_name) \
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COGL_HANDLE_DEFINE_WITH_CODE \
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(TypeName, type_name, \
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_cogl_texture_register_texture_type (_cogl_handle_ \
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## type_name ## _get_type ()))
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void
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_cogl_texture_foreach_sub_texture_in_region (CoglHandle handle,
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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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gboolean
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_cogl_texture_can_hardware_repeat (CoglHandle handle);
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void
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_cogl_texture_transform_coords_to_gl (CoglHandle handle,
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float *s,
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float *t);
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CoglTransformResult
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_cogl_texture_transform_quad_coords_to_gl (CoglHandle handle,
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float *coords);
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GLenum
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_cogl_texture_get_gl_format (CoglHandle handle);
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void
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_cogl_texture_set_wrap_mode_parameters (CoglHandle handle,
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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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void
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_cogl_texture_set_filters (CoglHandle handle,
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GLenum min_filter,
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GLenum mag_filter);
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void
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_cogl_texture_pre_paint (CoglHandle handle, CoglTexturePrePaintFlags flags);
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void
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_cogl_texture_ensure_non_quad_rendering (CoglHandle handle);
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/* Utility function to determine which pixel format to use when
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dst_format is COGL_PIXEL_FORMAT_ANY. If dst_format is not ANY then
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it will just be returned directly */
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CoglPixelFormat
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_cogl_texture_determine_internal_format (CoglPixelFormat src_format,
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CoglPixelFormat dst_format);
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/* Utility function to help uploading a bitmap. If the bitmap needs
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premult conversion then it will be copied and *copied_bitmap will
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be set to TRUE. Otherwise dst_bmp will be set to a shallow copy of
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src_bmp. The GLenums needed for uploading are returned */
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gboolean
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_cogl_texture_prepare_for_upload (CoglBitmap *src_bmp,
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CoglPixelFormat dst_format,
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CoglPixelFormat *dst_format_out,
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CoglBitmap *dst_bmp,
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gboolean *copied_bitmap,
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GLenum *out_glintformat,
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GLenum *out_glformat,
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GLenum *out_gltype);
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void
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_cogl_texture_prep_gl_alignment_for_pixels_upload (int pixels_rowstride);
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void
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_cogl_texture_prep_gl_alignment_for_pixels_download (int pixels_rowstride);
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/* Utility function for implementing manual repeating. Even texture
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backends that always support hardware repeating need this because
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when foreach_sub_texture_in_region is invoked Cogl will set the
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wrap mode to GL_CLAMP_TO_EDGE so hardware repeating can't be
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done */
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void
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_cogl_texture_iterate_manual_repeats (CoglTextureManualRepeatCallback callback,
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float tx_1, float ty_1,
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float tx_2, float ty_2,
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void *user_data);
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/* Utility function to use as a fallback for getting the data of any
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texture via the framebuffer */
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gboolean
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_cogl_texture_draw_and_read (CoglHandle handle,
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CoglBitmap *target_bmp,
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GLuint target_gl_format,
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GLuint target_gl_type);
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gboolean
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_cogl_texture_is_foreign (CoglHandle handle);
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#endif /* __COGL_TEXTURE_PRIVATE_H */
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