120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include "gl-subsystem.h"
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static inline bool init_ib(struct gs_index_buffer *ib)
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{
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GLenum usage = ib->dynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
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bool success;
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success = gl_create_buffer(GL_ELEMENT_ARRAY_BUFFER, &ib->buffer,
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ib->size, ib->data, usage);
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if (!ib->dynamic) {
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bfree(ib->data);
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ib->data = NULL;
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}
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return success;
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}
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gs_indexbuffer_t *device_indexbuffer_create(gs_device_t *device,
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enum gs_index_type type,
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void *indices, size_t num,
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uint32_t flags)
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{
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struct gs_index_buffer *ib = bzalloc(sizeof(struct gs_index_buffer));
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size_t width = type == GS_UNSIGNED_LONG ? 4 : 2;
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ib->device = device;
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ib->data = indices;
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ib->dynamic = flags & GS_DYNAMIC;
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ib->num = num;
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ib->width = width;
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ib->size = width * num;
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ib->type = type;
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ib->gl_type = type == GS_UNSIGNED_LONG ? GL_UNSIGNED_INT
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: GL_UNSIGNED_SHORT;
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if (!init_ib(ib)) {
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blog(LOG_ERROR, "device_indexbuffer_create (GL) failed");
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gs_indexbuffer_destroy(ib);
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return NULL;
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}
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return ib;
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}
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void gs_indexbuffer_destroy(gs_indexbuffer_t *ib)
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{
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if (ib) {
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if (ib->buffer)
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gl_delete_buffers(1, &ib->buffer);
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bfree(ib->data);
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bfree(ib);
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}
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}
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static inline void gs_indexbuffer_flush_internal(gs_indexbuffer_t *ib,
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const void *data)
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{
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if (!ib->dynamic) {
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blog(LOG_ERROR, "Index buffer is not dynamic");
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goto fail;
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}
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if (!update_buffer(GL_ELEMENT_ARRAY_BUFFER, ib->buffer, data, ib->size))
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goto fail;
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return;
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fail:
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blog(LOG_ERROR, "gs_indexbuffer_flush (GL) failed");
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}
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void gs_indexbuffer_flush(gs_indexbuffer_t *ib)
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{
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gs_indexbuffer_flush_internal(ib, ib->data);
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}
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void gs_indexbuffer_flush_direct(gs_indexbuffer_t *ib, const void *data)
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{
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gs_indexbuffer_flush_internal(ib, data);
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}
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void *gs_indexbuffer_get_data(const gs_indexbuffer_t *ib)
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{
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return ib->data;
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}
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size_t gs_indexbuffer_get_num_indices(const gs_indexbuffer_t *ib)
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{
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return ib->num;
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}
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enum gs_index_type gs_indexbuffer_get_type(const gs_indexbuffer_t *ib)
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{
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return ib->type;
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}
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void device_load_indexbuffer(gs_device_t *device, gs_indexbuffer_t *ib)
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{
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device->cur_index_buffer = ib;
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}
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