c9df41c1e2
Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
114 lines
2.8 KiB
C
114 lines
2.8 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_ARRAY_BUFFER, &ib->buffer, ib->size,
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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, 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 ? sizeof(long) : sizeof(short);
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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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void gs_indexbuffer_flush(gs_indexbuffer_t *ib)
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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_ARRAY_BUFFER, ib->buffer, ib->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_get_data(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(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(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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if (ib == device->cur_index_buffer)
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return;
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device->cur_index_buffer = ib;
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if (!gl_bind_buffer(GL_ELEMENT_ARRAY_BUFFER, ib->buffer))
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blog(LOG_ERROR, "device_load_indexbuffer (GL) failed");
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}
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