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/** \file
* \brief Cairo IMAGERGB Driver
*
* See Copyright Notice in cd.h
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "cd.h"
#include "cdcairo.h"
#include "cdcairoctx.h"
static char* get_stride_attrib(cdCtxCanvas* ctxcanvas)
{
static char data[100];
sprintf(data, "%d", cairo_image_surface_get_stride(cairo_get_target(ctxcanvas->cr)));
return data;
}
static cdAttribute stride_attrib =
{
"STRIDE",
NULL,
get_stride_attrib
};
static void set_write2png_attrib(cdCtxCanvas *ctxcanvas, char* data)
{
if (data)
cairo_surface_write_to_png(cairo_get_target(ctxcanvas->cr), data);
}
static cdAttribute write2png_attrib =
{
"WRITE2PNG",
set_write2png_attrib,
NULL
};
static char* get_data_attrib(cdCtxCanvas* ctxcanvas)
{
return (char*)ctxcanvas->rgb;
}
static cdAttribute data_attrib =
{
"RGBDATA",
NULL,
get_data_attrib
};
static void cdkillcanvas (cdCtxCanvas *ctxcanvas)
{
if (!ctxcanvas->user_image)
free(ctxcanvas->rgb);
cdcairoKillCanvas(ctxcanvas);
}
static void cdcreatecanvas(cdCanvas* canvas, void* data)
{
cdCtxCanvas* ctxcanvas;
cairo_surface_t *surface;
int w = 0, h = 0, use_alpha = 0;
float res = (float)3.78;
unsigned char *rgb = NULL;
char* str_data = (char*)data;
char* res_ptr = NULL;
cairo_format_t format = CAIRO_FORMAT_RGB24;
/* Starting parameters */
if (str_data == NULL)
return;
if (strstr(str_data, "-a"))
use_alpha = 1;
res_ptr = strstr(str_data, "-r");
if (res_ptr)
sscanf(res_ptr+2, "%g", &res);
/* size and rgb */
#ifdef SunOS_OLD
sscanf(str_data, "%dx%d %d", &w, &h, &rgb);
#else
sscanf(str_data, "%dx%d %p", &w, &h, &rgb);
#endif
if (w == 0 || h == 0)
return;
canvas->w = w;
canvas->h = h;
canvas->yres = res;
canvas->xres = res;
canvas->w_mm = ((double)w) / res;
canvas->h_mm = ((double)h) / res;
if (use_alpha)
{
canvas->bpp = 32;
format = CAIRO_FORMAT_ARGB32;
}
else
canvas->bpp = 24; /* fake value, image bpp is always 32 */
if (rgb)
surface = cairo_image_surface_create_for_data(rgb, format, w, h, w*32);
else
surface = cairo_image_surface_create(format, canvas->w, canvas->h);
/* Starting Cairo driver */
ctxcanvas = cdcairoCreateCanvas(canvas, cairo_create(surface));
cairo_surface_destroy(surface);
if (rgb)
{
ctxcanvas->user_image = 1;
ctxcanvas->rgb = rgb;
}
else
{
ctxcanvas->user_image = 0;
ctxcanvas->rgb = cairo_image_surface_get_data(cairo_get_target(ctxcanvas->cr));
/* fill with white */
/* transparent, this is the normal alpha coding */
cairo_set_source_rgba(ctxcanvas->cr, 1.0, 1.0, 1.0, 0.0);
cairo_rectangle(ctxcanvas->cr, 0, 0, canvas->w, canvas->h);
cairo_fill(ctxcanvas->cr);
}
cdRegisterAttribute(canvas, &stride_attrib);
cdRegisterAttribute(canvas, &write2png_attrib);
cdRegisterAttribute(canvas, &data_attrib);
}
static void cdinittable(cdCanvas* canvas)
{
cdcairoInitTable(canvas);
canvas->cxKillCanvas = cdkillcanvas;
}
static cdContext cdCairoImageRGBContext =
{
CD_CAP_ALL & ~(CD_CAP_PLAY | CD_CAP_YAXIS | CD_CAP_REGION | CD_CAP_WRITEMODE | CD_CAP_PALETTE),
CD_CTX_IMAGE, /* not a plus driver */
cdcreatecanvas,
cdinittable,
NULL,
NULL
};
cdContext* cdContextCairoImageRGB(void)
{
return &cdCairoImageRGBContext;
}
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