b833d26b3f
Interleaving multiple snippets with different hooks (COGL_SNIPPET_HOOK_VERTEX and COGL_SNIPPET_HOOK_VERTEX_TRANSFORM, for instance) used to cause a bug during shader code generation. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 38ca76695d54bbbfe3b940a6d0b2ae879e6fd66b)
296 lines
9.2 KiB
C
296 lines
9.2 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) 2011, 2013 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
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* <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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* Neil Roberts <neil@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 <string.h>
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#include "cogl-types.h"
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#include "cogl-pipeline-snippet-private.h"
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#include "cogl-snippet-private.h"
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#include "cogl-util.h"
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/* Helper functions that are used by both GLSL pipeline backends */
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void
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_cogl_pipeline_snippet_generate_code (const CoglPipelineSnippetData *data)
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{
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CoglPipelineSnippet *first_snippet, *snippet;
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int snippet_num = 0;
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int n_snippets = 0;
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first_snippet = COGL_LIST_FIRST (data->snippets);
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/* First count the number of snippets so we can easily tell when
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we're at the last one */
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COGL_LIST_FOREACH (snippet, data->snippets, list_node)
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if (snippet->snippet->hook == data->hook)
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{
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/* Don't bother processing any previous snippets if we reach
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one that has a replacement */
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if (snippet->snippet->replace)
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{
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n_snippets = 1;
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first_snippet = snippet;
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}
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else
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n_snippets++;
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}
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/* If there weren't any snippets then generate a stub function with
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the final name */
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if (n_snippets == 0)
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{
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if (data->return_type)
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g_string_append_printf (data->source_buf,
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"\n"
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"%s\n"
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"%s (%s)\n"
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"{\n"
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" return %s (%s);\n"
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"}\n",
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data->return_type,
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data->final_name,
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data->argument_declarations ?
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data->argument_declarations : "",
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data->chain_function,
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data->arguments ? data->arguments : "");
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else
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g_string_append_printf (data->source_buf,
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"\n"
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"void\n"
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"%s (%s)\n"
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"{\n"
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" %s (%s);\n"
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"}\n",
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data->final_name,
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data->argument_declarations ?
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data->argument_declarations : "",
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data->chain_function,
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data->arguments ? data->arguments : "");
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return;
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}
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for (snippet = first_snippet, snippet_num = 0;
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snippet_num < n_snippets;
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snippet = COGL_LIST_NEXT (snippet, list_node))
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if (snippet->snippet->hook == data->hook)
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{
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const char *source;
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if ((source = cogl_snippet_get_declarations (snippet->snippet)))
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g_string_append (data->source_buf, source);
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g_string_append_printf (data->source_buf,
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"\n"
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"%s\n",
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data->return_type ?
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data->return_type :
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"void");
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if (snippet_num + 1 < n_snippets)
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g_string_append_printf (data->source_buf,
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"%s_%i",
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data->function_prefix,
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snippet_num);
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else
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g_string_append (data->source_buf, data->final_name);
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g_string_append (data->source_buf, " (");
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if (data->argument_declarations)
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g_string_append (data->source_buf, data->argument_declarations);
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g_string_append (data->source_buf,
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")\n"
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"{\n");
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if (data->return_type && !data->return_variable_is_argument)
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g_string_append_printf (data->source_buf,
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" %s %s;\n"
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"\n",
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data->return_type,
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data->return_variable);
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if ((source = cogl_snippet_get_pre (snippet->snippet)))
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g_string_append (data->source_buf, source);
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/* Chain on to the next function, or bypass it if there is
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a replace string */
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if ((source = cogl_snippet_get_replace (snippet->snippet)))
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g_string_append (data->source_buf, source);
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else
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{
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g_string_append (data->source_buf, " ");
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if (data->return_type)
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g_string_append_printf (data->source_buf,
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"%s = ",
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data->return_variable);
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if (snippet_num > 0)
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g_string_append_printf (data->source_buf,
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"%s_%i",
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data->function_prefix,
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snippet_num - 1);
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else
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g_string_append (data->source_buf, data->chain_function);
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g_string_append (data->source_buf, " (");
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if (data->arguments)
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g_string_append (data->source_buf, data->arguments);
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g_string_append (data->source_buf, ");\n");
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}
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if ((source = cogl_snippet_get_post (snippet->snippet)))
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g_string_append (data->source_buf, source);
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if (data->return_type)
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g_string_append_printf (data->source_buf,
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" return %s;\n",
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data->return_variable);
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g_string_append (data->source_buf, "}\n");
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snippet_num++;
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}
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}
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void
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_cogl_pipeline_snippet_generate_declarations (GString *declarations_buf,
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CoglSnippetHook hook,
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CoglPipelineSnippetList *snippets)
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{
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CoglPipelineSnippet *snippet;
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COGL_LIST_FOREACH (snippet, snippets, list_node)
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if (snippet->snippet->hook == hook)
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{
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const char *source;
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if ((source = cogl_snippet_get_declarations (snippet->snippet)))
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g_string_append (declarations_buf, source);
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}
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}
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static void
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_cogl_pipeline_snippet_free (CoglPipelineSnippet *pipeline_snippet)
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{
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cogl_object_unref (pipeline_snippet->snippet);
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g_slice_free (CoglPipelineSnippet, pipeline_snippet);
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}
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void
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_cogl_pipeline_snippet_list_free (CoglPipelineSnippetList *list)
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{
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CoglPipelineSnippet *pipeline_snippet, *tmp;
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COGL_LIST_FOREACH_SAFE (pipeline_snippet, list, list_node, tmp)
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_cogl_pipeline_snippet_free (pipeline_snippet);
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}
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void
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_cogl_pipeline_snippet_list_add (CoglPipelineSnippetList *list,
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CoglSnippet *snippet)
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{
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CoglPipelineSnippet *pipeline_snippet = g_slice_new (CoglPipelineSnippet);
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pipeline_snippet->snippet = cogl_object_ref (snippet);
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_cogl_snippet_make_immutable (pipeline_snippet->snippet);
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if (COGL_LIST_EMPTY (list))
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COGL_LIST_INSERT_HEAD (list, pipeline_snippet, list_node);
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else
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{
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CoglPipelineSnippet *tail;
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for (tail = COGL_LIST_FIRST (list);
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COGL_LIST_NEXT (tail, list_node);
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tail = COGL_LIST_NEXT (tail, list_node));
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COGL_LIST_INSERT_AFTER (tail, pipeline_snippet, list_node);
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}
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}
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void
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_cogl_pipeline_snippet_list_copy (CoglPipelineSnippetList *dst,
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const CoglPipelineSnippetList *src)
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{
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CoglPipelineSnippet *tail = NULL;
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const CoglPipelineSnippet *l;
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COGL_LIST_INIT (dst);
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COGL_LIST_FOREACH (l, src, list_node)
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{
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CoglPipelineSnippet *copy = g_slice_dup (CoglPipelineSnippet, l);
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cogl_object_ref (copy->snippet);
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if (tail)
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COGL_LIST_INSERT_AFTER (tail, copy, list_node);
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else
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COGL_LIST_INSERT_HEAD (dst, copy, list_node);
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tail = copy;
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}
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}
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void
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_cogl_pipeline_snippet_list_hash (CoglPipelineSnippetList *list,
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unsigned int *hash)
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{
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CoglPipelineSnippet *l;
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COGL_LIST_FOREACH (l, list, list_node)
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{
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*hash = _cogl_util_one_at_a_time_hash (*hash,
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&l->snippet,
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sizeof (CoglSnippet *));
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}
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}
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CoglBool
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_cogl_pipeline_snippet_list_equal (CoglPipelineSnippetList *list0,
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CoglPipelineSnippetList *list1)
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{
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CoglPipelineSnippet *l0, *l1;
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for (l0 = COGL_LIST_FIRST (list0), l1 = COGL_LIST_FIRST (list1);
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l0 && l1;
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l0 = COGL_LIST_NEXT (l0, list_node), l1 = COGL_LIST_NEXT (l1, list_node))
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if (l0->snippet != l1->snippet)
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return FALSE;
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return l0 == NULL && l1 == NULL;
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}
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