75 lines
1.3 KiB
C
75 lines
1.3 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "gc.h"
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struct gfx_ctx {
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struct gfx_ctx_image *gc_image;
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int raw;
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};
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struct gfx_ctx *
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gc_init(int width, int height, void *fbaddr)
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{
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struct gfx_ctx *gc;
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struct gfx_ctx_image *gc_image;
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gc = calloc(1, sizeof(struct gfx_ctx));
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assert(gc != NULL);
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gc_image = calloc(1, sizeof(struct gfx_ctx_image));
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assert(gc_image != NULL);
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gc_image->width = width;
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gc_image->height = height;
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if (fbaddr) {
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gc_image->data = fbaddr;
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gc->raw = 1;
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} else {
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gc_image->data = calloc(width * height, sizeof(uint32_t));
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gc->raw = 0;
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}
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gc->gc_image = gc_image;
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return gc;
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}
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void
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gc_set_fbaddr(struct gfx_ctx *gc, void *fbaddr)
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{
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gc->raw = 1;
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if (gc->gc_image->data && gc->gc_image->data != fbaddr)
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free(gc->gc_image->data);
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gc->gc_image->data = fbaddr;
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}
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void
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gc_resize(struct gfx_ctx *gc, int width, int height)
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{
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struct gfx_ctx_image *gc_image;
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gc_image = gc->gc_image;
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gc_image->width = width;
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gc_image->height = height;
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if (!gc->raw) {
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gc_image->data = realloc(gc_image->data,
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width * height * sizeof(uint32_t));
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if (gc_image->data != NULL)
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memset(gc_image->data, 0, width * height *
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sizeof(uint32_t));
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}
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}
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struct gfx_ctx_image *
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gc_get_image(struct gfx_ctx *gc)
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{
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if (gc == NULL)
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return NULL;
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return gc->gc_image;
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}
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