ec03357e88
This adds a buffer method to map a subregion of the buffer. This works using the GL_ARB_map_buffer_range extension. If the extension is not available then it will fallback to using glMapBuffer to map the entire buffer and then just add the offset to the returned pointer. cogl_buffer_map() is now just a wrapper which maps the entire range of the buffer. The driver backend functions have been renamed to map_range and they now all take the offset and size arguments. When the COGL_BUFFER_MAP_HINT_DISCARD hint is used and the map range extension is available instead of using glBufferData to invalidate the buffer it will instead pass the new GL_MAP_HINT_INVALIDATE_BUFFER flag. There is now additionally a COGL_BUFFER_MAP_HINT_DISCARD_REGION hint which can be used if the application only wants to discard the small region that is mapped. glMapBufferRange is always used if it is available even if the entire buffer is being mapped because it seems more robust to pass those flags then to call glBufferData. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 55ca02b5ca9cafc750251ec974e0d6a536cb80b8)
399 lines
13 KiB
C
399 lines
13 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl-internal.h"
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#include "cogl-context-private.h"
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#include "cogl-feature-private.h"
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#include "cogl-renderer-private.h"
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#include "cogl-private.h"
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#include "cogl-framebuffer-gl-private.h"
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#include "cogl-texture-2d-gl-private.h"
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#include "cogl-attribute-gl-private.h"
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#include "cogl-clip-stack-gl-private.h"
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#include "cogl-buffer-gl-private.h"
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#ifndef GL_UNSIGNED_INT_24_8
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#define GL_UNSIGNED_INT_24_8 0x84FA
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#endif
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#ifndef GL_DEPTH_STENCIL
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#define GL_DEPTH_STENCIL 0x84F9
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#endif
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static CoglBool
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_cogl_driver_pixel_format_from_gl_internal (CoglContext *context,
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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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static CoglPixelFormat
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_cogl_driver_pixel_format_to_gl (CoglContext *context,
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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;
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GLenum glformat = 0;
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GLenum gltype;
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required_format = format;
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/* Find GL equivalents */
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switch (format)
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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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case COGL_PIXEL_FORMAT_BGRA_8888:
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case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
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/* There is an extension to support this format */
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if ((context->private_feature_flags &
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COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888))
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{
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/* For some reason the extension says you have to specify
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BGRA for the internal format too */
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glintformat = GL_BGRA_EXT;
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glformat = GL_BGRA_EXT;
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gltype = GL_UNSIGNED_BYTE;
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required_format = format;
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break;
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}
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/* flow through */
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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_RGBA_8888_PRE:
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case COGL_PIXEL_FORMAT_ARGB_8888:
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case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
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case COGL_PIXEL_FORMAT_ABGR_8888:
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case COGL_PIXEL_FORMAT_ABGR_8888_PRE:
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case COGL_PIXEL_FORMAT_RGBA_1010102:
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case COGL_PIXEL_FORMAT_RGBA_1010102_PRE:
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case COGL_PIXEL_FORMAT_BGRA_1010102:
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case COGL_PIXEL_FORMAT_BGRA_1010102_PRE:
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case COGL_PIXEL_FORMAT_ABGR_2101010:
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case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
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case COGL_PIXEL_FORMAT_ARGB_2101010:
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case COGL_PIXEL_FORMAT_ARGB_2101010_PRE:
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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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case COGL_PIXEL_FORMAT_RGBA_4444_PRE:
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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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case COGL_PIXEL_FORMAT_RGBA_5551_PRE:
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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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case COGL_PIXEL_FORMAT_DEPTH_16:
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glintformat = GL_DEPTH_COMPONENT;
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glformat = GL_DEPTH_COMPONENT;
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gltype = GL_UNSIGNED_SHORT;
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break;
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case COGL_PIXEL_FORMAT_DEPTH_32:
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glintformat = GL_DEPTH_COMPONENT;
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glformat = GL_DEPTH_COMPONENT;
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gltype = GL_UNSIGNED_INT;
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break;
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case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
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glintformat = GL_DEPTH_STENCIL;
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glformat = GL_DEPTH_STENCIL;
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gltype = GL_UNSIGNED_INT_24_8;
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break;
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case COGL_PIXEL_FORMAT_ANY:
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case COGL_PIXEL_FORMAT_YUV:
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g_assert_not_reached ();
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break;
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}
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/* All of the pixel formats are handled above so if this hits then
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we've been given an invalid pixel format */
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g_assert (glformat != 0);
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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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static CoglBool
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_cogl_driver_update_features (CoglContext *context,
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CoglError **error)
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{
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CoglPrivateFeatureFlags private_flags = 0;
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CoglFeatureFlags flags = 0;
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char **gl_extensions;
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int num_stencil_bits = 0;
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/* We have to special case getting the pointer to the glGetString
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function because we need to use it to determine what functions we
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can expect */
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context->glGetString =
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(void *) _cogl_renderer_get_proc_address (context->display->renderer,
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"glGetString",
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TRUE);
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gl_extensions = _cogl_context_get_gl_extensions (context);
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_WINSYS)))
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{
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char *all_extensions = g_strjoinv (" ", gl_extensions);
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COGL_NOTE (WINSYS,
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"Checking features\n"
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" GL_VENDOR: %s\n"
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" GL_RENDERER: %s\n"
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" GL_VERSION: %s\n"
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" GL_EXTENSIONS: %s",
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context->glGetString (GL_VENDOR),
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context->glGetString (GL_RENDERER),
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_cogl_context_get_gl_version (context),
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all_extensions);
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g_free (all_extensions);
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}
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context->glsl_major = 1;
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context->glsl_minor = 0;
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_cogl_gpu_info_init (context, &context->gpu);
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_cogl_feature_check_ext_functions (context,
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-1 /* GL major version */,
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-1 /* GL minor version */,
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gl_extensions);
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GE( context, glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
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/* We need at least three stencil bits to combine clips */
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if (num_stencil_bits > 2)
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private_flags |= COGL_PRIVATE_FEATURE_STENCIL_BUFFER;
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#ifdef HAVE_COGL_GLES
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if (context->driver == COGL_DRIVER_GLES1)
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{
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int max_clip_planes;
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GE( context, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
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if (max_clip_planes >= 4)
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private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
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}
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#endif
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if (context->driver == COGL_DRIVER_GLES2)
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{
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flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
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/* Note GLES 2 core doesn't support mipmaps for npot textures or
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* repeat modes other than CLAMP_TO_EDGE. */
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flags |= COGL_FEATURE_TEXTURE_NPOT_BASIC;
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flags |= COGL_FEATURE_DEPTH_RANGE;
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_GLSL, TRUE);
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
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private_flags |= COGL_PRIVATE_FEATURE_BLEND_CONSTANT;
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}
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else if (context->driver == COGL_DRIVER_GLES1)
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private_flags |= (COGL_PRIVATE_FEATURE_FIXED_FUNCTION |
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COGL_PRIVATE_FEATURE_ALPHA_TEST |
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COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM);
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private_flags |= (COGL_PRIVATE_FEATURE_VBOS |
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COGL_PRIVATE_FEATURE_ANY_GL);
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/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
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flags |= COGL_FEATURE_POINT_SPRITE;
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
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if (context->glGenRenderbuffers)
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{
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flags |= COGL_FEATURE_OFFSCREEN;
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
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}
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if (context->glBlitFramebuffer)
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private_flags |= COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT;
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if (_cogl_check_extension ("GL_OES_element_index_uint", gl_extensions))
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{
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flags |= COGL_FEATURE_UNSIGNED_INT_INDICES;
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
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}
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if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
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{
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flags |= COGL_FEATURE_DEPTH_TEXTURE;
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
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}
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if (_cogl_check_extension ("GL_OES_texture_npot", gl_extensions))
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{
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flags |= (COGL_FEATURE_TEXTURE_NPOT |
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COGL_FEATURE_TEXTURE_NPOT_BASIC |
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COGL_FEATURE_TEXTURE_NPOT_MIPMAP |
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COGL_FEATURE_TEXTURE_NPOT_REPEAT);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
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}
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else if (_cogl_check_extension ("GL_IMG_texture_npot", gl_extensions))
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{
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flags |= (COGL_FEATURE_TEXTURE_NPOT_BASIC |
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COGL_FEATURE_TEXTURE_NPOT_MIPMAP);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
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}
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if (context->glTexImage3D)
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{
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flags |= COGL_FEATURE_TEXTURE_3D;
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COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_TEXTURE_3D, TRUE);
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}
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if (context->glMapBuffer)
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{
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/* The GL_OES_mapbuffer extension doesn't support mapping for
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read */
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flags |= COGL_FEATURE_MAP_BUFFER_FOR_WRITE;
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COGL_FLAGS_SET (context->features,
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COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE, TRUE);
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}
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if (context->glEGLImageTargetTexture2D)
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private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
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if (_cogl_check_extension ("GL_OES_packed_depth_stencil", gl_extensions))
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private_flags |= COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL;
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if (_cogl_check_extension ("GL_EXT_texture_format_BGRA8888", gl_extensions))
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private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888;
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if (_cogl_check_extension ("GL_EXT_unpack_subimage", gl_extensions))
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private_flags |= COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE;
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/* Cache features */
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context->private_feature_flags |= private_flags;
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context->feature_flags |= flags;
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g_strfreev (gl_extensions);
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return TRUE;
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}
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const CoglDriverVtable
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_cogl_driver_gles =
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{
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_cogl_driver_pixel_format_from_gl_internal,
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_cogl_driver_pixel_format_to_gl,
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_cogl_driver_update_features,
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_cogl_offscreen_gl_allocate,
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_cogl_offscreen_gl_free,
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_cogl_framebuffer_gl_flush_state,
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_cogl_framebuffer_gl_clear,
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_cogl_framebuffer_gl_query_bits,
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_cogl_framebuffer_gl_finish,
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_cogl_framebuffer_gl_discard_buffers,
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_cogl_framebuffer_gl_draw_attributes,
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_cogl_framebuffer_gl_draw_indexed_attributes,
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_cogl_texture_2d_gl_free,
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_cogl_texture_2d_gl_can_create,
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_cogl_texture_2d_gl_init,
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_cogl_texture_2d_gl_new_with_size,
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_cogl_texture_2d_gl_new_from_bitmap,
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#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
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_cogl_egl_texture_2d_gl_new_from_image,
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#endif
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_cogl_texture_2d_gl_copy_from_framebuffer,
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_cogl_texture_2d_gl_get_gl_handle,
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_cogl_texture_2d_gl_generate_mipmap,
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_cogl_texture_2d_gl_copy_from_bitmap,
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NULL, /* texture_2d_get_data */
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_cogl_gl_flush_attributes_state,
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_cogl_clip_stack_gl_flush,
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_cogl_buffer_gl_create,
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_cogl_buffer_gl_destroy,
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_cogl_buffer_gl_map_range,
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_cogl_buffer_gl_unmap,
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_cogl_buffer_gl_set_data,
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};
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