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#include <tinyff/image/bmp.h>
#include <tinyff/dbg.h>
#include <tinyff/result.h>
ff_result ff_bmp_isvalid(ff_ctx* ctx, ff_stream* stream)
{
ff_dprintf(ctx, "png: validating signature\n");
char raw_sig[2];
if (stream->read(raw_sig, 2, stream->user) != 2) {
ff_dprintf(ctx, "bmp: failed to read signature bytes\n");
return FF_RESULT_ERROR_INVALID_FILE;
}
ff_dprintf(ctx, // TODO: fix formatting
"bmp: signature read \n"
);
if (memcmp(raw_sig, BMP_SIGNATURE, 2) != 0) {
ff_dprintf(ctx, "bmp: signature mismatch\n");
return FF_RESULT_ERROR_INVALID_PNG_SIGNATURE;
}
ff_dprintf(ctx, "bmp: signature valid\n");
return FF_RESULT_OK;
}
ff_result ff_open_bmp(ff_ctx* ctx, ff_stream *stream, ff_bmp_ctx **out_ctx, ff_flag require_valid)
{
ff_bmp_ctx *bmp_ctx = ctx->allocator.ff_alloc(sizeof(ff_bmp_ctx));
if (!ctx) return FF_RESULT_ERROR_MEMORY_ALLOCATION;
// Init
memset(ctx, 0, sizeof(*ctx));
bmp_ctx->raw = stream;
bmp_ctx->last_error = FF_RESULT_OK;
if (bmp_ctx->raw->read == NULL) {
ff_dprintf(ctx, "bmp: stream failed to read\n");
ctx->allocator.ff_free(bmp_ctx);
return FF_RESULT_ERROR_READ_FILE_FAILURE;
}
ff_dprintf(ctx, "bmp: stream read successfully\n");
if (require_valid) {
ff_result res = ff_bmp_isvalid(ctx, bmp_ctx->raw);
if (res != FF_RESULT_OK) {
ff_dprintf(ctx, "bmp: validation failed\n"); // TODO: Formatting
ctx->allocator.ff_free(bmp_ctx);
return res;
}
}
ff_dprintf(ctx, "bmp: validation passed\n");
bmp_ctx->valid = true;
*out_ctx = bmp_ctx;
ff_dprintf(ctx, "bmp: open_bmp reached WIP end\n");
return FF_RESULT_WARN_NO_IMPL;
}
ff_result ff_bmp_header_handler(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx *bmp_ctx) {
(void) buf;
(void) bmp_ctx;
if (len != FF_BMP_HEADER_SIZE) {
ff_dprintf(ctx, "bmp: bitmap header is not correct size (expected 14, got [n length])\n"); // TODO: formatting
bmp_ctx->last_error = FF_RESULT_ERROR_INVALID_BMP_HEADER;
return FF_RESULT_ERROR_INVALID_BMP_HEADER;
}
// We've already read the signiture so we just jump straight to
// the fileSize part
bmp_ctx->file_size = buf[4];
return FF_RESULT_WARN_NO_IMPL;
}
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