84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
#include <GL/oscontext.h>
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#include "zbuffer.h"
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#include "zgl.h"
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#include <GL/gl.h>
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#include <stdlib.h>
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static int buffercnt = 0;
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ostgl_context *
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ostgl_create_context(const int xsize,
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const int ysize,
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const int depth,
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void **framebuffers,
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const int numbuffers)
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{
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ostgl_context *context;
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int i;
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ZBuffer *zb;
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gl_assert(depth == 16); /* support for other depths must include bpp
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convertion */
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gl_assert(numbuffers >= 1);
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context = gl_malloc(sizeof(ostgl_context));
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gl_assert(context);
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context->zbs = gl_malloc(sizeof(void*)*numbuffers);
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context->framebuffers = gl_malloc(sizeof(void*)*numbuffers);
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gl_assert(context->zbs != NULL && context->framebuffers != NULL);
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for (i = 0; i < numbuffers; i++) {
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context->framebuffers[i] = framebuffers[i];
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zb = ZB_open(xsize, ysize, ZB_MODE_5R6G5B, 0, NULL, NULL, framebuffers[i]);
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if (zb == NULL) {
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fprintf(stderr, "Error while initializing Z buffer\n");
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exit(1);
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}
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context->zbs[i] = zb;
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}
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if (++buffercnt == 1) {
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glInit(context->zbs[0]);
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}
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context->xsize = xsize;
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context->ysize = ysize;
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context->numbuffers = numbuffers;
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return context;
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}
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void
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ostgl_delete_context(ostgl_context *context)
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{
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int i;
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for (i = 0; i < context->numbuffers; i++) {
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ZB_close(context->zbs[i]);
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}
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gl_free(context->zbs);
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gl_free(context->framebuffers);
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gl_free(context);
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if (--buffercnt == 0) {
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glClose();
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}
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}
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void
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ostgl_make_current(ostgl_context *oscontext, const int idx)
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{
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GLContext *context = gl_get_context();
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gl_assert(idx < oscontext->numbuffers);
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context->zb = oscontext->zbs[idx];
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}
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void
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ostgl_resize(ostgl_context *context,
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const int xsize,
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const int ysize,
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void **framebuffers)
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{
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int i;
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for (i = 0; i < context->numbuffers; i++) {
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ZB_resize(context->zbs[i], framebuffers[i], xsize, ysize);
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}
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}
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