65015a137e
cogl-texture-2d-sliced provides an implementation of CoglTexture and this
seperation lays the foundation for potentially supporting atlas textures,
pixmap textures (as in GLX_EXT_texture_from_pixmap) and fast-path
GL_TEXTURE_{1D,2D,3D,RECTANGLE} textures in a maintainable fashion.
281 lines
8.6 KiB
C
281 lines
8.6 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Matthew Allum <mallum@openedhand.com>
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* Neil Roberts <neil@linux.intel.com>
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* Robert Bragg <robert@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-bitmap.h"
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#include "cogl-bitmap-private.h"
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#include "cogl-texture-private.h"
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#include "cogl-material.h"
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#include "cogl-context.h"
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#include "cogl-handle.h"
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#include "cogl-primitives.h"
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "cogl-gles2-wrapper.h"
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void
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_cogl_texture_driver_bind (GLenum gl_target,
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GLuint gl_handle,
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GLenum gl_intformat)
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{
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GE (cogl_gles2_wrapper_bind_texture (gl_target, gl_handle, gl_intformat));
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}
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void
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_cogl_texture_driver_prep_gl_for_pixels_upload (int pixels_rowstride,
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int pixels_bpp)
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{
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_cogl_texture_prep_gl_alignment_for_pixels_upload (pixels_rowstride);
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}
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void
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_cogl_texture_driver_prep_gl_for_pixels_download (int pixels_rowstride,
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int pixels_bpp)
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{
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_cogl_texture_prep_gl_alignment_for_pixels_download (pixels_rowstride);
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}
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void
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_cogl_texture_driver_upload_subregion_to_gl (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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int width,
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int height,
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CoglBitmap *source_bmp,
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GLuint source_gl_format,
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GLuint source_gl_type,
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GLuint gl_handle)
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{
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int bpp = _cogl_get_format_bpp (source_bmp->format);
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CoglBitmap slice_bmp;
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/* NB: GLES doesn't support the GL_UNPACK_ROW_LENGTH, GL_UNPACK_SKIP_PIXELS
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* or GL_UNPACK_SKIP_ROWS pixel store options so we can't directly source a
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* sub-region from source_bmp, we need to use a transient bitmap instead. */
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/* FIXME: optimize by not copying to intermediate slice bitmap when source
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* rowstride = bpp * width and the texture image is not sliced */
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/* Setup temp bitmap for slice subregion */
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slice_bmp.format = tex->bitmap.format;
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slice_bmp.width = width;
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slice_bmp.height = height;
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slice_bmp.rowstride = bpp * slice_bmp.width;
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slice_bmp.data = (guchar*) g_malloc (slice_bmp.rowstride * slice_bmp.height);
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/* Setup gl alignment to match rowstride and top-left corner */
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_cogl_texture_driver_prep_gl_for_pixels_upload (slice_bmp.rowstride,
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bpp);
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/* Copy subregion data */
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_cogl_bitmap_copy_subregion (source_bmp,
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&slice_bmp,
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src_x,
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src_y,
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0, 0,
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slice_bmp.width,
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slice_bmp.height);
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/* Upload new image data */
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GE( _cogl_texture_driver_bind (tex->gl_target,
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gl_handle, tex->gl_intformat) );
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GE( glTexSubImage2D (tex->gl_target, 0,
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dst_x, dst_y,
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width, height,
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source_gl_format,
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source_gl_type,
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slice_bmp.data) );
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/* Free temp bitmap */
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g_free (slice_bmp.data);
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}
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/* NB: GLES doesn't support glGetTexImage2D, so cogl-texture will instead
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* fallback to a generic render + readpixels approach to downloading
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* texture data. (See _cogl_texture_draw_and_read() ) */
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gboolean
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_cogl_texture_driver_gl_get_tex_image (GLenum gl_target,
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GLenum dest_gl_format,
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GLenum dest_gl_type,
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guint8 *dest)
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{
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return FALSE;
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}
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gboolean
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_cogl_texture_driver_size_supported (GLenum gl_target,
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GLenum gl_format,
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GLenum gl_type,
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int width,
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int height)
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{
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return TRUE;
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}
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void
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_cogl_texture_driver_try_setting_gl_border_color (
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GLuint gl_target,
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const GLfloat *transparent_color)
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{
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/* FAIL! */
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}
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gboolean
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_cogl_pixel_format_from_gl_internal (GLenum gl_int_format,
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CoglPixelFormat *out_format)
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{
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return TRUE;
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}
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CoglPixelFormat
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_cogl_pixel_format_to_gl (CoglPixelFormat format,
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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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{
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CoglPixelFormat required_format;
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GLenum glintformat = 0;
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GLenum glformat = 0;
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GLenum gltype = 0;
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/* FIXME: check YUV support */
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required_format = format;
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/* Find GL equivalents */
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switch (format & COGL_UNPREMULT_MASK)
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{
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case COGL_PIXEL_FORMAT_A_8:
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glintformat = GL_ALPHA;
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glformat = GL_ALPHA;
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gltype = GL_UNSIGNED_BYTE;
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break;
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case COGL_PIXEL_FORMAT_G_8:
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glintformat = GL_LUMINANCE;
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glformat = GL_LUMINANCE;
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gltype = GL_UNSIGNED_BYTE;
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break;
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/* Just one 24-bit ordering supported */
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case COGL_PIXEL_FORMAT_RGB_888:
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case COGL_PIXEL_FORMAT_BGR_888:
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glintformat = GL_RGB;
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glformat = GL_RGB;
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gltype = GL_UNSIGNED_BYTE;
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required_format = COGL_PIXEL_FORMAT_RGB_888;
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break;
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/* Just one 32-bit ordering supported */
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case COGL_PIXEL_FORMAT_RGBA_8888:
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case COGL_PIXEL_FORMAT_BGRA_8888:
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case COGL_PIXEL_FORMAT_ARGB_8888:
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case COGL_PIXEL_FORMAT_ABGR_8888:
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glintformat = GL_RGBA;
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glformat = GL_RGBA;
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gltype = GL_UNSIGNED_BYTE;
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required_format = COGL_PIXEL_FORMAT_RGBA_8888;
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required_format |= (format & COGL_PREMULT_BIT);
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break;
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/* The following three types of channel ordering
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* are always defined using system word byte
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* ordering (even according to GLES spec) */
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case COGL_PIXEL_FORMAT_RGB_565:
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glintformat = GL_RGB;
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glformat = GL_RGB;
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gltype = GL_UNSIGNED_SHORT_5_6_5;
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break;
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case COGL_PIXEL_FORMAT_RGBA_4444:
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glintformat = GL_RGBA;
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glformat = GL_RGBA;
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gltype = GL_UNSIGNED_SHORT_4_4_4_4;
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break;
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case COGL_PIXEL_FORMAT_RGBA_5551:
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glintformat = GL_RGBA;
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glformat = GL_RGBA;
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gltype = GL_UNSIGNED_SHORT_5_5_5_1;
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break;
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/* FIXME: check extensions for YUV support */
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default:
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break;
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}
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if (out_glintformat != NULL)
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*out_glintformat = glintformat;
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if (out_glformat != NULL)
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*out_glformat = glformat;
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if (out_gltype != NULL)
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*out_gltype = gltype;
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return required_format;
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}
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gboolean
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_cogl_texture_driver_allows_foreign_gl_target (GLenum gl_target)
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{
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/* Allow 2-dimensional textures only */
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if (gl_target != GL_TEXTURE_2D)
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return FALSE;
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return TRUE;
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}
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void
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_cogl_texture_driver_gl_generate_mipmaps (GLenum gl_target)
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{
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GE( cogl_wrap_glGenerateMipmap (gl_target) );
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}
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CoglPixelFormat
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_cogl_texture_driver_find_best_gl_get_data_format (
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CoglPixelFormat format,
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GLenum *closest_gl_format,
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GLenum *closest_gl_type)
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{
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/* Find closest format that's supported by GL
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(Can't use _cogl_pixel_format_to_gl since available formats
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when reading pixels on GLES are severely limited) */
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*closest_gl_format = GL_RGBA;
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*closest_gl_type = GL_UNSIGNED_BYTE;
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return COGL_PIXEL_FORMAT_RGBA_8888;
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}
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