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#include <stdio.h>
#include <stdlib.h>
#include <cairo.h>
#include <unistd.h>
#include "caskbench.h"

static int max_dim;

static char rand_text_array[19][100];
void gen_random(char *s, const int len) {
    static const char alphanum[] =
        "ABCD EFG HIJKL MNOPQ RSTUVW XYZ";

    for (int i = 0; i < len; ++i) {
        s[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
    }

    s[len] = 0;
}
int
ca_setup_text(caskbench_context_t *ctx)
{
    max_dim = MIN (ctx->canvas_width, ctx->canvas_height)/2;
	for(int i = 0;i<19;i++)
	{
		gen_random (rand_text_array[i],i+18);
	}
    return 1;
}

void
ca_teardown_text(void)
{
}


int
ca_test_text(caskbench_context_t *ctx)
{

    cairo_t *cr = ctx->cairo_cr;

    for (int i = 0; i < ctx->size; i++)
    {
        double font_size = 18;
        int ypos = 0, xpos = 0;

        cairo_set_source_rgb (cr, 0, 0, 0);
        cairo_rectangle (cr, 0, 0, ctx->canvas_width ,ctx->canvas_height);
        cairo_fill (cr);


        for(font_size = 18; font_size <= 36; font_size++) 
		{
	    	cairo_set_font_size (cr, font_size);
	    	randomize_color (cr);

			cairo_status_t status;
			cairo_scaled_font_t *font;
			font = cairo_get_scaled_font (cr);
			cairo_glyph_t *glyphs = NULL;
			int num_glyphs;
			cairo_text_cluster_t *clusters = NULL;
			int num_clusters;
			cairo_text_cluster_flags_t cluster_flags;

			char text[(int)font_size];
			gen_random (text,font_size);
			
			status = cairo_scaled_font_text_to_glyphs (font,
                                           xpos, ypos,
                                           text, font_size,
                                           &glyphs, &num_glyphs,
                                           &clusters, &num_clusters, &cluster_flags);

			if (status == CAIRO_STATUS_SUCCESS) {
		    cairo_show_text_glyphs (cr,
		    	             rand_text_array[(int)font_size-18],font_size,
        	                 glyphs, num_glyphs,
                             clusters, num_clusters, cluster_flags);
			}
			 ypos += (font_size/2);
		}

	    for(font_size = 36; font_size >= 18; font_size--)
    	{

        	cairo_set_font_size (cr, font_size);

	        randomize_color (cr);

    	    cairo_status_t status;
    	    cairo_scaled_font_t *font;
	        font = cairo_get_scaled_font (cr);
	        cairo_glyph_t *glyphs = NULL;
        	int num_glyphs;
	        cairo_text_cluster_t *clusters = NULL;
	        int num_clusters;
	        cairo_text_cluster_flags_t cluster_flags;


			char text[(int)font_size];
			gen_random (text,font_size);

	        status = cairo_scaled_font_text_to_glyphs (font,
                                           xpos, ypos,
                                           text, font_size,
                                           &glyphs, &num_glyphs,
                                           &clusters, &num_clusters, &cluster_flags);

    	    if (status == CAIRO_STATUS_SUCCESS) {
        	cairo_show_text_glyphs (cr,
                             rand_text_array[(int)font_size-18],font_size,
                             glyphs, num_glyphs,
                             clusters, num_clusters, cluster_flags);
        	}
         	ypos += (font_size/2);
   		}

	}	

	return 1;
}