From b7d97c7ed82f0d0472cf0c2ae5d61e99a73b33a8 Mon Sep 17 00:00:00 2001
From: scuri <scuri>
Date: Wed, 12 May 2010 20:38:46 +0000
Subject: New Cairo driver

---
 src/cairo/cdcairoirgb.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 src/cairo/cdcairoirgb.c

(limited to 'src/cairo/cdcairoirgb.c')

diff --git a/src/cairo/cdcairoirgb.c b/src/cairo/cdcairoirgb.c
new file mode 100644
index 0000000..1bb9698
--- /dev/null
+++ b/src/cairo/cdcairoirgb.c
@@ -0,0 +1,159 @@
+/** \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_FPRIMTIVES),
+  0,
+  cdcreatecanvas,  
+  cdinittable,
+  NULL,                 
+  NULL
+};
+
+cdContext* cdContextCairoImageRGB(void)
+{
+  return &cdCairoImageRGBContext;
+}
-- 
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