1 #include <string.h>

     2 #include <arpa/inet.h>

     3 

     4 #include "render.h"

     5 

     6 int render_init (render_t *ctx, int mode) {

     7     memset(ctx, 0, sizeof(*ctx));

     8     

     9     return render_set_mode(ctx, mode);

    10 }

    11 

    12 int render_set_mode (render_t *ctx, int mode) {

    13     if (mode != RENDER_RAW && mode != RENDER_PNG)

    14         return RENDER_ERR;

    15 

    16     ctx->mode = mode;

    17 

    18     return RENDER_OK;

    19 }

    20 

    21 int render_set_size (render_t *ctx, u_int32_t img_w, u_int32_t img_h) {

    22     if (img_w == 0 || img_h == 0)

    23         return RENDER_ERR;

    24 

    25     ctx->img_w = img_w;

    26     ctx->img_h = img_h;

    27 

    28     return RENDER_OK;

    29 }

    30 

    31 int render_region_full (render_t *ctx) {

    32     return render_region_raw(ctx, REGION_X1, REGION_Y1, REGION_X2, REGION_Y2);

    33 }

    34 

    35 int render_region_raw (render_t *ctx, double x1, double y1, double x2, double y2) {

    36     if ((x1 >= x2) || (y1 >= y2))

    37         return RENDER_ERR;

    38 

    39     ctx->x1 = x1;

    40     ctx->y1 = y1;

    41     ctx->x2 = x2;

    42     ctx->y2 = y2;

    43 

    44     return RENDER_OK;

    45 }

    46 

    47 int render_io_custom (render_t *ctx, render_ctx_write_cb write_fn, render_ctx_flush_cb flush_fn, void *arg) {

    48     if (!write_fn)

    49         return RENDER_ERR;

    50 

    51     ctx->io_write_fn = write_fn;

    52     ctx->io_flush_fn = flush_fn;

    53     ctx->io_cb_arg = arg;

    54 

    55     return RENDER_OK;

    56 }

    57 

    58 int render_io_stream (render_t *ctx, FILE *fh) {

    59     if (!fh)

    60         return RENDER_ERR;

    61 

    62     ctx->io_stream = fh;

    63 

    64     return RENDER_OK;

    65 }

    66 

    67 int render_cmd_build (render_t *ctx, struct render_cmd *cmd) {

    68    cmd->img_w = htonl(ctx->img_w);

    69    cmd->img_h = htonl(ctx->img_h);

    70    cmd->x1 = ctx->x1;

    71    cmd->y1 = ctx->y1;

    72    cmd->x2 = ctx->x2;

    73    cmd->y2 = ctx->y2;

    74 

    75    return RENDER_OK;

    76 }

    77