mirror of
https://github.com/brl/mutter.git
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81bb87e037
Until now, we hardcoded the internal format to GL_RGBA and used the internal format returned by pixel_format_to_gl() as the format for checking the texture size and format we're asked to create. Let's use the proper internal format/format from now on. This is needed as a later patch introduces DEPTH and DEPTH_STENCIL textures. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ec45f60ee2545f88302da314bcdbe1439c4ba9c9)
415 lines
15 KiB
C
415 lines
15 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-private.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-pipeline.h"
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#include "cogl-context-private.h"
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#include "cogl-object-private.h"
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#include "cogl-primitives.h"
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#include "cogl-pipeline-opengl-private.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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static void
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_cogl_texture_driver_gen (CoglContext *ctx,
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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 (ctx, glGenTextures (n, textures));
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for (i = 0; i < n; i++)
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{
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_cogl_bind_gl_texture_transient (gl_target,
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textures[i],
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FALSE);
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switch (gl_target)
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{
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case GL_TEXTURE_2D:
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case GL_TEXTURE_3D:
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/* GL_TEXTURE_MAG_FILTER defaults to GL_LINEAR, no need to set it */
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GE( ctx, glTexParameteri (gl_target,
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GL_TEXTURE_MIN_FILTER,
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GL_LINEAR) );
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break;
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case GL_TEXTURE_RECTANGLE_ARB:
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/* Texture rectangles already default to GL_LINEAR so nothing
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needs to be done */
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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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/* OpenGL - unlike GLES - can upload a sub region of pixel data from a larger
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* source buffer */
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static void
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prep_gl_for_pixels_upload_full (CoglContext *ctx,
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int pixels_rowstride,
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int image_height,
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int pixels_src_x,
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int pixels_src_y,
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int pixels_bpp)
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{
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GE( ctx, glPixelStorei (GL_UNPACK_ROW_LENGTH,
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pixels_rowstride / pixels_bpp) );
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GE( ctx, glPixelStorei (GL_UNPACK_SKIP_PIXELS, pixels_src_x) );
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GE( ctx, glPixelStorei (GL_UNPACK_SKIP_ROWS, pixels_src_y) );
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if (cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_3D))
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GE( ctx, glPixelStorei (GL_UNPACK_IMAGE_HEIGHT, image_height) );
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_cogl_texture_prep_gl_alignment_for_pixels_upload (pixels_rowstride);
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}
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static void
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_cogl_texture_driver_prep_gl_for_pixels_upload (CoglContext *ctx,
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int pixels_rowstride,
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int pixels_bpp)
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{
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prep_gl_for_pixels_upload_full (ctx, pixels_rowstride, 0, 0, 0, pixels_bpp);
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}
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/* OpenGL - unlike GLES - can download pixel data into a sub region of
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* a larger destination buffer */
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static void
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prep_gl_for_pixels_download_full (CoglContext *ctx,
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int image_width,
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int pixels_rowstride,
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int image_height,
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int pixels_src_x,
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int pixels_src_y,
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int pixels_bpp)
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{
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GE( ctx, glPixelStorei (GL_PACK_ROW_LENGTH, pixels_rowstride / pixels_bpp) );
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GE( ctx, glPixelStorei (GL_PACK_SKIP_PIXELS, pixels_src_x) );
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GE( ctx, glPixelStorei (GL_PACK_SKIP_ROWS, pixels_src_y) );
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if (cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_3D))
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GE( ctx, glPixelStorei (GL_PACK_IMAGE_HEIGHT, image_height) );
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_cogl_texture_prep_gl_alignment_for_pixels_download (pixels_bpp,
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image_width,
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pixels_rowstride);
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}
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static void
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_cogl_texture_driver_prep_gl_for_pixels_download (CoglContext *ctx,
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int image_width,
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int pixels_rowstride,
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int pixels_bpp)
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{
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prep_gl_for_pixels_download_full (ctx,
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pixels_rowstride,
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image_width,
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0 /* image height */,
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0, 0, /* pixels_src_x/y */
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pixels_bpp);
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}
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static void
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_cogl_texture_driver_upload_subregion_to_gl (CoglContext *ctx,
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GLenum gl_target,
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GLuint gl_handle,
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CoglBool is_foreign,
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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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uint8_t *data;
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CoglPixelFormat source_format = cogl_bitmap_get_format (source_bmp);
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int bpp = _cogl_pixel_format_get_bytes_per_pixel (source_format);
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data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
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/* Setup gl alignment to match rowstride and top-left corner */
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prep_gl_for_pixels_upload_full (ctx,
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cogl_bitmap_get_rowstride (source_bmp),
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0,
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src_x,
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src_y,
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bpp);
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_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
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GE( ctx, 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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data) );
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_cogl_bitmap_unbind (source_bmp);
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}
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static void
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_cogl_texture_driver_upload_to_gl (CoglContext *ctx,
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GLenum gl_target,
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GLuint gl_handle,
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CoglBool is_foreign,
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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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uint8_t *data;
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CoglPixelFormat source_format = cogl_bitmap_get_format (source_bmp);
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int bpp = _cogl_pixel_format_get_bytes_per_pixel (source_format);
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data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
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/* Setup gl alignment to match rowstride and top-left corner */
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prep_gl_for_pixels_upload_full (ctx,
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cogl_bitmap_get_rowstride (source_bmp),
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0, 0, 0, bpp);
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_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
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GE( ctx, glTexImage2D (gl_target, 0,
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internal_gl_format,
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cogl_bitmap_get_width (source_bmp),
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cogl_bitmap_get_height (source_bmp),
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0,
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source_gl_format,
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source_gl_type,
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data) );
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_cogl_bitmap_unbind (source_bmp);
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}
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static void
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_cogl_texture_driver_upload_to_gl_3d (CoglContext *ctx,
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GLenum gl_target,
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GLuint gl_handle,
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CoglBool is_foreign,
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GLint height,
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GLint depth,
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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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uint8_t *data;
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CoglPixelFormat source_format = cogl_bitmap_get_format (source_bmp);
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int bpp = _cogl_pixel_format_get_bytes_per_pixel (source_format);
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data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
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/* Setup gl alignment to match rowstride and top-left corner */
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prep_gl_for_pixels_upload_full (ctx,
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cogl_bitmap_get_rowstride (source_bmp),
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(cogl_bitmap_get_height (source_bmp) /
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depth),
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0, 0, bpp);
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_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
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GE( ctx, glTexImage3D (gl_target,
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0, /* level */
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internal_gl_format,
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cogl_bitmap_get_width (source_bmp),
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height,
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depth,
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0,
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source_gl_format,
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source_gl_type,
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data) );
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_cogl_bitmap_unbind (source_bmp);
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}
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static CoglBool
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_cogl_texture_driver_gl_get_tex_image (CoglContext *ctx,
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GLenum gl_target,
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GLenum dest_gl_format,
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GLenum dest_gl_type,
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uint8_t *dest)
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{
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GE (ctx, glGetTexImage (gl_target,
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0, /* level */
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dest_gl_format,
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dest_gl_type,
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(GLvoid *)dest));
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return TRUE;
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}
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static CoglBool
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_cogl_texture_driver_size_supported_3d (CoglContext *ctx,
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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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int depth)
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{
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GLenum proxy_target;
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GLint new_width = 0;
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if (gl_target == GL_TEXTURE_3D)
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proxy_target = GL_PROXY_TEXTURE_3D;
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else
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/* Unknown target, assume it's not supported */
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return FALSE;
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/* Proxy texture allows for a quick check for supported size */
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GE( ctx, glTexImage3D (proxy_target, 0, GL_RGBA,
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width, height, depth, 0 /* border */,
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gl_format, gl_type, NULL) );
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GE( ctx, glGetTexLevelParameteriv (proxy_target, 0,
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GL_TEXTURE_WIDTH, &new_width) );
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return new_width != 0;
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}
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static CoglBool
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_cogl_texture_driver_size_supported (CoglContext *ctx,
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GLenum gl_target,
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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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int width,
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int height)
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{
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GLenum proxy_target;
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GLint new_width = 0;
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if (gl_target == GL_TEXTURE_2D)
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proxy_target = GL_PROXY_TEXTURE_2D;
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#if HAVE_COGL_GL
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else if (gl_target == GL_TEXTURE_RECTANGLE_ARB)
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proxy_target = GL_PROXY_TEXTURE_RECTANGLE_ARB;
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#endif
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else
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/* Unknown target, assume it's not supported */
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return FALSE;
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/* Proxy texture allows for a quick check for supported size */
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GE( ctx, glTexImage2D (proxy_target, 0, gl_intformat,
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width, height, 0 /* border */,
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gl_format, gl_type, NULL) );
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GE( ctx, glGetTexLevelParameteriv (proxy_target, 0,
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GL_TEXTURE_WIDTH, &new_width) );
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return new_width != 0;
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}
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static void
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_cogl_texture_driver_try_setting_gl_border_color
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(CoglContext *ctx,
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GLuint gl_target,
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const GLfloat *transparent_color)
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{
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/* Use a transparent border color so that we can leave the
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color buffer alone when using texture co-ordinates
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outside of the texture */
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GE( ctx, glTexParameterfv (gl_target, GL_TEXTURE_BORDER_COLOR,
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transparent_color) );
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}
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static CoglBool
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_cogl_texture_driver_allows_foreign_gl_target (CoglContext *ctx,
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GLenum gl_target)
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{
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/* GL_ARB_texture_rectangle textures are supported if they are
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created from foreign because some chipsets have trouble with
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GL_ARB_texture_non_power_of_two. There is no Cogl call to create
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them directly to emphasize the fact that they don't work fully
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(for example, no mipmapping and complicated shader support) */
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/* Allow 2-dimensional or rectangle textures only */
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if (gl_target != GL_TEXTURE_2D && gl_target != GL_TEXTURE_RECTANGLE_ARB)
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return FALSE;
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return TRUE;
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}
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static void
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_cogl_texture_driver_gl_generate_mipmaps (CoglContext *ctx,
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GLenum gl_target)
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{
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GE( ctx, glGenerateMipmap (gl_target) );
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}
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static CoglPixelFormat
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_cogl_texture_driver_find_best_gl_get_data_format
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(CoglContext *context,
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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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return context->driver_vtable->pixel_format_to_gl (context,
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format,
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NULL, /* don't need */
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closest_gl_format,
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closest_gl_type);
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}
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const CoglTextureDriver
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_cogl_texture_driver_gl =
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{
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_cogl_texture_driver_gen,
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_cogl_texture_driver_prep_gl_for_pixels_upload,
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_cogl_texture_driver_upload_subregion_to_gl,
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_cogl_texture_driver_upload_to_gl,
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_cogl_texture_driver_upload_to_gl_3d,
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_cogl_texture_driver_prep_gl_for_pixels_download,
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_cogl_texture_driver_gl_get_tex_image,
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_cogl_texture_driver_size_supported,
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_cogl_texture_driver_size_supported_3d,
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_cogl_texture_driver_try_setting_gl_border_color,
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_cogl_texture_driver_allows_foreign_gl_target,
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_cogl_texture_driver_gl_generate_mipmaps,
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_cogl_texture_driver_find_best_gl_get_data_format
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};
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