f17767e4c1
This provides a way to upload the entire data for a texture without having to first call glTexImage and then glTexSubImage. This should be faster especially with indirect rendering where it would needlessy send the data for the texture twice.
328 lines
10 KiB
C
328 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, 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 (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 = (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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/* We don't need to use _cogl_texture_driver_bind here because we're
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not using the bound texture to render yet */
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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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/* We don't need to use _cogl_texture_driver_bind here because we're
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not using the bound texture to render yet */
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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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