805b88d4c0
Bug 1289 - Draw multiple glyphs at once
The multiple-texture-rectangle branch adds a new Cogl texture function
called cogl_texture_multiple_rectangles which is used to draw multiple
rectangles out of a texture using a single GL call. This is
significantly faster than drawing the rectangles with individual calls
on some platforms. The Pango renderer now uses this to speed up
rendering.
The conflicts are just due to the whitespace fixes in cb569a5.
Conflicts:
clutter/cogl/gl/cogl-context.c
clutter/cogl/gl/cogl-context.h
clutter/cogl/gl/cogl-texture.c
169 lines
5 KiB
C
169 lines
5 KiB
C
/*
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* Clutter COGL
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*
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* A basic GL/GLES Abstraction/Utility Layer
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2007 OpenedHand
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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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#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-context.h"
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#include <string.h>
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static CoglContext *_context = NULL;
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gboolean
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cogl_create_context ()
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{
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if (_context != NULL)
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return FALSE;
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/* Allocate context memory */
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_context = (CoglContext*) g_malloc (sizeof (CoglContext));
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/* Init default values */
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_context->feature_flags = 0;
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_context->features_cached = FALSE;
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_context->enable_flags = 0;
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_context->color_alpha = 255;
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_context->path_nodes = g_array_new (FALSE, FALSE, sizeof (CoglPathNode));
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_context->last_path = 0;
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_context->texture_handles = NULL;
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_context->texture_vertices = g_array_new (FALSE, FALSE,
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sizeof (CoglTextureGLVertex));
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_context->texture_indices = g_array_new (FALSE, FALSE,
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sizeof (GLushort));
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_context->fbo_handles = NULL;
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_context->draw_buffer = COGL_WINDOW_BUFFER;
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_context->blend_src_factor = CGL_SRC_ALPHA;
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_context->blend_dst_factor = CGL_ONE_MINUS_SRC_ALPHA;
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_context->shader_handles = NULL;
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_context->program_handles = NULL;
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_context->mesh_handles = NULL;
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_context->pf_glGenRenderbuffersEXT = NULL;
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_context->pf_glBindRenderbufferEXT = NULL;
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_context->pf_glRenderbufferStorageEXT = NULL;
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_context->pf_glGenFramebuffersEXT = NULL;
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_context->pf_glBindFramebufferEXT = NULL;
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_context->pf_glFramebufferTexture2DEXT = NULL;
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_context->pf_glFramebufferRenderbufferEXT = NULL;
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_context->pf_glCheckFramebufferStatusEXT = NULL;
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_context->pf_glDeleteFramebuffersEXT = NULL;
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_context->pf_glBlitFramebufferEXT = NULL;
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_context->pf_glRenderbufferStorageMultisampleEXT = NULL;
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_context->pf_glCreateProgramObjectARB = NULL;
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_context->pf_glCreateShaderObjectARB = NULL;
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_context->pf_glShaderSourceARB = NULL;
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_context->pf_glCompileShaderARB = NULL;
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_context->pf_glAttachObjectARB = NULL;
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_context->pf_glLinkProgramARB = NULL;
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_context->pf_glUseProgramObjectARB = NULL;
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_context->pf_glGetUniformLocationARB = NULL;
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_context->pf_glDeleteObjectARB = NULL;
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_context->pf_glGetInfoLogARB = NULL;
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_context->pf_glGetObjectParameterivARB = NULL;
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_context->pf_glUniform1fARB = NULL;
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_context->pf_glUniform2fARB = NULL;
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_context->pf_glUniform3fARB = NULL;
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_context->pf_glUniform4fARB = NULL;
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_context->pf_glUniform1fvARB = NULL;
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_context->pf_glUniform2fvARB = NULL;
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_context->pf_glUniform3fvARB = NULL;
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_context->pf_glUniform4fvARB = NULL;
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_context->pf_glUniform1iARB = NULL;
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_context->pf_glUniform2iARB = NULL;
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_context->pf_glUniform3iARB = NULL;
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_context->pf_glUniform4iARB = NULL;
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_context->pf_glUniform1ivARB = NULL;
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_context->pf_glUniform2ivARB = NULL;
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_context->pf_glUniform3ivARB = NULL;
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_context->pf_glUniform4ivARB = NULL;
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_context->pf_glUniformMatrix2fvARB = NULL;
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_context->pf_glUniformMatrix3fvARB = NULL;
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_context->pf_glUniformMatrix4fvARB = NULL;
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_context->pf_glDrawRangeElements = NULL;
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/* Init OpenGL state */
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GE( glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE) );
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GE( glColorMask (TRUE, TRUE, TRUE, FALSE) );
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GE( glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) );
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cogl_enable (0);
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/* Initialise the clip stack */
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_cogl_clip_stack_state_init ();
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return TRUE;
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}
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void
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cogl_destroy_context ()
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{
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if (_context == NULL)
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return;
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_cogl_clip_stack_state_destroy ();
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if (_context->path_nodes)
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g_array_free (_context->path_nodes, TRUE);
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if (_context->texture_handles)
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g_array_free (_context->texture_handles, TRUE);
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if (_context->fbo_handles)
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g_array_free (_context->fbo_handles, TRUE);
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if (_context->shader_handles)
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g_array_free (_context->shader_handles, TRUE);
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if (_context->program_handles)
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g_array_free (_context->program_handles, TRUE);
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if (_context->texture_vertices)
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g_array_free (_context->texture_vertices, TRUE);
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if (_context->texture_indices)
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g_array_free (_context->texture_indices, TRUE);
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g_free (_context);
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}
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CoglContext *
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_cogl_context_get_default ()
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{
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/* Create if doesn't exist yet */
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if (_context == NULL)
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cogl_create_context ();
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return _context;
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}
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