72f4ddf532
Since using addresses that might change is something that finally the FSF acknowledge as a plausible scenario (after changing address twice), the license blurb in the source files should use the URI for getting the license in case the library did not come with it. Not that URIs cannot possibly change, but at least it's easier to set up a redirection at the same place. As a side note: this commit closes the oldes bug in Clutter's bug report tool. http://bugzilla.openedhand.com/show_bug.cgi?id=521
341 lines
10 KiB
C
341 lines
10 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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* 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_gen (GLenum gl_target,
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GLsizei n,
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GLuint *textures)
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{
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unsigned int i;
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GE (glGenTextures (n, textures));
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for (i = 0; i < n; i++)
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{
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GE (glBindTexture (gl_target, textures[i]));
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switch (gl_target)
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{
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case GL_TEXTURE_2D:
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/* GL_TEXTURE_MAG_FILTER defaults to GL_LINEAR, no need to set it */
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GE( glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR) );
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break;
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default:
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g_assert_not_reached();
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}
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}
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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 (GLenum gl_target,
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GLuint gl_handle,
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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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{
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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 = source_bmp->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 = 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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GE( glBindTexture (gl_target, gl_handle) );
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GE( glTexSubImage2D (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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void
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_cogl_texture_driver_upload_to_gl (GLenum gl_target,
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GLuint gl_handle,
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CoglBitmap *source_bmp,
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GLint internal_gl_format,
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GLuint source_gl_format,
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GLuint source_gl_type)
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{
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int bpp = _cogl_get_format_bpp (source_bmp->format);
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CoglBitmap bmp = *source_bmp;
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gboolean bmp_owner = FALSE;
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/* If the rowstride can't be specified with just GL_ALIGNMENT alone
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then we need to copy the bitmap because there is no GL_ROW_LENGTH */
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if (source_bmp->rowstride / bpp != source_bmp->width)
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{
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bmp.rowstride = bpp * bmp.width;
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bmp.data = g_malloc (bmp.rowstride * bmp.height);
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bmp_owner = TRUE;
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_cogl_bitmap_copy_subregion (source_bmp,
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&bmp,
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0, 0, 0, 0,
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bmp.width,
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bmp.height);
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}
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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 (bmp.rowstride,
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bpp);
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GE( glBindTexture (gl_target, gl_handle) );
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GE( glTexImage2D (gl_target, 0,
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internal_gl_format,
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bmp.width, bmp.height,
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0,
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source_gl_format,
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source_gl_type,
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bmp.data) );
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if (bmp_owner)
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g_free (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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