terom@11: #include <stdlib.h>
terom@1: #include <string.h>
terom@1: 
terom@18: #include "render_struct.h"
terom@1: #include "render.h"
terom@1: 
terom@23: int render_init (struct render *ctx) {
terom@1:     memset(ctx, 0, sizeof(*ctx));
terom@23: 
terom@23:     return 0;
terom@1: }
terom@1: 
terom@11: struct render *render_alloc () {
terom@11:     struct render *ctx;
terom@11: 
terom@11:     if (!(ctx = calloc(1, sizeof(struct render))))
terom@11:         return NULL;
terom@11: 
terom@11:     return ctx;
terom@11: }
terom@11: 
terom@21: void render_free(struct render *ctx) {
terom@21:     free(ctx);
terom@21: }
terom@21: 
terom@11: int render_set_mode (struct render *ctx, int mode) {
terom@1:     if (mode != RENDER_RAW && mode != RENDER_PNG)
terom@11:         return -1;
terom@1: 
terom@1:     ctx->mode = mode;
terom@1: 
terom@11:     return 0;
terom@1: }
terom@1: 
terom@11: int render_set_size (struct render *ctx, u_int32_t img_w, u_int32_t img_h) {
terom@1:     if (img_w == 0 || img_h == 0)
terom@11:         return -1;
terom@1: 
terom@1:     ctx->img_w = img_w;
terom@1:     ctx->img_h = img_h;
terom@1: 
terom@22:     // default render region...
terom@22:     ctx->img_left = ctx->img_top = 0;
terom@22:     ctx->img_right = img_w;
terom@22:     ctx->img_bottom = img_h;
terom@22:     ctx->img_x_step = ctx->img_y_step = 1;
terom@22: 
terom@11:     return 0;
terom@1: }
terom@1: 
terom@11: int render_get_size (struct render *ctx, u_int32_t *img_w, u_int32_t *img_h) {
terom@11:     *img_w = ctx->img_w;
terom@11:     *img_h = ctx->img_h;
terom@11: 
terom@11:     return 0;
terom@11: }
terom@11: 
terom@11: int render_region_full (struct render *ctx) {
terom@1:     return render_region_raw(ctx, REGION_X1, REGION_Y1, REGION_X2, REGION_Y2);
terom@1: }
terom@1: 
terom@11: int render_region_raw (struct render *ctx, double x1, double y1, double x2, double y2) {
terom@1:     if ((x1 >= x2) || (y1 >= y2))
terom@11:         return -1;
terom@1: 
terom@1:     ctx->x1 = x1;
terom@1:     ctx->y1 = y1;
terom@1:     ctx->x2 = x2;
terom@1:     ctx->y2 = y2;
terom@1: 
terom@11:     return 0;
terom@1: }
terom@1: 
terom@11: int render_io_custom (struct render *ctx, render_ctx_write_cb write_fn, render_ctx_flush_cb flush_fn, void *arg) {
terom@1:     if (!write_fn)
terom@11:         return -1;
terom@1: 
terom@1:     ctx->io_write_fn = write_fn;
terom@1:     ctx->io_flush_fn = flush_fn;
terom@11:     ctx->cb_arg = arg;
terom@1: 
terom@11:     return 0;
terom@1: }
terom@1: 
terom@11: int render_io_stream (struct render *ctx, FILE *fh) {
terom@1:     if (!fh)
terom@11:         return -1;
terom@1: 
terom@1:     ctx->io_stream = fh;
terom@1: 
terom@11:     return 0;
terom@1: }
terom@1: 
terom@11: int render_local_mem (struct render *ctx, unsigned char **rowbuf_addr, render_ctx_row_cb row_fn, void *arg) {
terom@11:     ctx->local_rowbuf_addr = rowbuf_addr;
terom@11:     ctx->local_row_fn = row_fn;
terom@11:     ctx->cb_arg = arg;
terom@11: 
terom@11:     return 0;
terom@11: }
terom@11: