diff options
Diffstat (limited to 'trunk/librosprite.c')
| -rw-r--r-- | trunk/librosprite.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/trunk/librosprite.c b/trunk/librosprite.c index 8b69254..50dacc8 100644 --- a/trunk/librosprite.c +++ b/trunk/librosprite.c @@ -40,6 +40,13 @@ struct rosprite_file_context { FILE* f; }; +struct rosprite_mem_context { + uint8_t* base; + unsigned long offset; + bool known_size; + unsigned long size; +}; + static const struct rosprite_mode oldmodes[] = { /*0*/{ .colorbpp = 1, .maskbpp = 1, .mask_width = 1, .xdpi = 90, .ydpi = 45, .color_model = rosprite_rgb }, /*1*/{ .colorbpp = 2, .maskbpp = 1, .mask_width = 2, .xdpi = 45, .ydpi = 45, .color_model = rosprite_rgb }, @@ -204,6 +211,29 @@ int rosprite_file_reader(uint8_t* buf, size_t count, void* ctx) return fread(buf, 1 /*size*/, count, ((struct rosprite_file_context*) ctx)->f); } +struct rosprite_mem_context* rosprite_create_mem_context(uint8_t* p, unsigned long total_size) +{ + struct rosprite_mem_context* ctx = malloc(sizeof(struct rosprite_mem_context)); + ctx->base = p; + ctx->offset = 0; + ctx->known_size = true; + ctx->size = total_size; + return ctx; +} + +void rosprite_destroy_mem_context(struct rosprite_mem_context* ctx) +{ + free(ctx); +} + +int rosprite_mem_reader(uint8_t* buf, size_t count, void* ctx) +{ + struct rosprite_mem_context* memctx = (struct rosprite_mem_context*) ctx; + buf = memctx->base + memctx->offset; + memctx->offset += count; + return count; // TODO: assert size bounds, return real count +} + /* TODO: get rid of this method */ uint32_t sprite_read_word(reader reader, void* ctx) { |