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Diffstat (limited to 'src/cairo/cdcairo.c')
-rw-r--r--src/cairo/cdcairo.c105
1 files changed, 75 insertions, 30 deletions
diff --git a/src/cairo/cdcairo.c b/src/cairo/cdcairo.c
index b86c046..493ae1f 100644
--- a/src/cairo/cdcairo.c
+++ b/src/cairo/cdcairo.c
@@ -117,7 +117,8 @@ void cdcairoKillCanvas(cdCtxCanvas *ctxcanvas)
if (ctxcanvas->strLastConvertUTF8)
g_free(ctxcanvas->strLastConvertUTF8);
- cairo_destroy(ctxcanvas->cr);
+ if (ctxcanvas->cr)
+ cairo_destroy(ctxcanvas->cr);
memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
free(ctxcanvas);
@@ -213,7 +214,7 @@ static int cdclip(cdCtxCanvas *ctxcanvas, int mode)
#define CD_ALPHAPRE(_src, _alpha) (((_src)*(_alpha))/255)
-static unsigned long sEncodeRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+static unsigned int sEncodeRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
/* Pre-multiplied alpha */
if (a != 255)
@@ -223,23 +224,32 @@ static unsigned long sEncodeRGBA(unsigned char r, unsigned char g, unsigned char
b = CD_ALPHAPRE(b, a);
}
- return (((unsigned long)a) << 24) |
- (((unsigned long)r) << 16) |
- (((unsigned long)g) << 8) |
- (((unsigned long)b) << 0);
+ return (((unsigned int)a) << 24) |
+ (((unsigned int)r) << 16) |
+ (((unsigned int)g) << 8) |
+ (((unsigned int)b) << 0);
}
static void make_pattern(cdCtxCanvas *ctxcanvas, int n, int m, void* userdata, int (*data2rgb)(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* userdata, unsigned char*r, unsigned char*g, unsigned char*b, unsigned char*a))
{
- int i, j, offset, ret;
+ int i, j, offset, ret, stride;
unsigned char r, g, b, a;
cairo_surface_t* pattern_surface;
- unsigned long* data;
+ unsigned int* data;
+ /* CAIRO_FORMAT_ARGB32 each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue.
+ The 32-bit quantities are stored native-endian.
+ Pre-multiplied alpha is used. (That is, 50% transparent red is 0x80800000, not 0x80ff0000.) */
pattern_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, n, m);
+ if (cairo_surface_status(pattern_surface) != CAIRO_STATUS_SUCCESS)
+ {
+ cairo_surface_destroy(pattern_surface);
+ return;
+ }
- data = (unsigned long*)cairo_image_surface_get_data(pattern_surface);
- offset = cairo_image_surface_get_stride(pattern_surface)/4 - n;
+ data = (unsigned int*)cairo_image_surface_get_data(pattern_surface);
+ stride = cairo_image_surface_get_stride(pattern_surface);
+ offset = stride/4 - n;
for (j = 0; j < m; j++)
{
@@ -284,7 +294,7 @@ static int long2rgb(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* data, uns
return 1;
}
-static void cdpattern(cdCtxCanvas *ctxcanvas, int n, int m, const long int *pattern)
+static void cdpattern(cdCtxCanvas *ctxcanvas, int n, int m, const long *pattern)
{
make_pattern(ctxcanvas, n, m, (void*)pattern, long2rgb);
cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
@@ -572,7 +582,7 @@ static void cdgetfontdim(cdCtxCanvas *ctxcanvas, int *max_width, int *height, in
pango_font_metrics_unref(metrics);
}
-static long int cdforeground(cdCtxCanvas *ctxcanvas, long int color)
+static long cdforeground(cdCtxCanvas *ctxcanvas, long color)
{
if (ctxcanvas->solid)
cairo_pattern_destroy(ctxcanvas->solid);
@@ -1288,8 +1298,8 @@ static void cdfpoly(cdCtxCanvas *ctxcanvas, int mode, cdfPoint* poly, int n)
static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned char *g, unsigned char *b, int x, int y, int w, int h)
{
- int i, j, pos, offset;
- unsigned long* data;
+ int i, j, pos, offset, stride;
+ unsigned int* data;
cairo_surface_t* image_surface;
cairo_t* cr;
@@ -1304,7 +1314,15 @@ static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned cha
/* y is the bottom-left of the image in CD, must be at upper-left */
y -= h-1;
+ /* CAIRO_FORMAT_RGB24 each pixel is a 32-bit quantity, with the upper 8 bits unused.
+ Red, Green, and Blue are stored in the remaining 24 bits in that order. */
image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
+ if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+ {
+ cairo_surface_destroy(image_surface);
+ return;
+ }
+
cr = cairo_create(image_surface);
/* creates a pattern from the canvas and sets it as source in the image. */
@@ -1314,8 +1332,9 @@ static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned cha
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint(cr); /* paints the current source everywhere within the current clip region. */
- data = (unsigned long*)cairo_image_surface_get_data(image_surface);
- offset = cairo_image_surface_get_stride(image_surface)/4 - w;
+ data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+ stride = cairo_image_surface_get_stride(image_surface);
+ offset = stride/4 - w;
for (i=0; i<h; i++)
{
@@ -1351,8 +1370,8 @@ static void sFixImageY(cdCanvas* canvas, int *topdown, int *y, int h)
static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
{
- int i, j, rw, rh, pos, offset, topdown;
- unsigned long* data;
+ int i, j, rw, rh, pos, offset, topdown, stride;
+ unsigned int* data;
cairo_surface_t* image_surface;
if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1360,10 +1379,18 @@ static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
rw = xmax-xmin+1;
rh = ymax-ymin+1;
+ /* CAIRO_FORMAT_RGB24 each pixel is a 32-bit quantity, with the upper 8 bits unused.
+ Red, Green, and Blue are stored in the remaining 24 bits in that order. */
image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, rw, rh);
+ if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+ {
+ cairo_surface_destroy(image_surface);
+ return;
+ }
- data = (unsigned long*)cairo_image_surface_get_data(image_surface);
- offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+ data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+ stride = cairo_image_surface_get_stride(image_surface);
+ offset = stride/4 - rw;
sFixImageY(ctxcanvas->canvas, &topdown, &y, h);
@@ -1404,8 +1431,8 @@ static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
static void cdputimagerectrgba(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, const unsigned char *a, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
{
- int i, j, rw, rh, pos, offset, topdown;
- unsigned long* data;
+ int i, j, rw, rh, pos, offset, topdown, stride;
+ unsigned int* data;
cairo_surface_t* image_surface;
if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1413,10 +1440,19 @@ static void cdputimagerectrgba(cdCtxCanvas *ctxcanvas, int iw, int ih, const uns
rw = xmax-xmin+1;
rh = ymax-ymin+1;
+ /* CAIRO_FORMAT_ARGB32 each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue.
+ The 32-bit quantities are stored native-endian.
+ Pre-multiplied alpha is used. (That is, 50% transparent red is 0x80800000, not 0x80ff0000.) */
image_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, rw, rh);
+ if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+ {
+ cairo_surface_destroy(image_surface);
+ return;
+ }
- data = (unsigned long*)cairo_image_surface_get_data(image_surface);
- offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+ data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+ stride = cairo_image_surface_get_stride(image_surface);
+ offset = stride/4 - rw;
sFixImageY(ctxcanvas->canvas, &topdown, &y, h);
@@ -1469,10 +1505,11 @@ static int sCalcPalSize(int size, const unsigned char *index)
return pal_size;
}
-static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *index, const long int *colors, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
+static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *index, const long *colors, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
{
- int i, j, rw, rh, pos, offset, pal_size, topdown;
- unsigned long* data, cairo_colors[256], c;
+ int i, j, rw, rh, pos, offset, pal_size, topdown, stride;
+ unsigned int* data, cairo_colors[256];
+ long c;
cairo_surface_t* image_surface;
if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1480,10 +1517,18 @@ static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
rw = xmax-xmin+1;
rh = ymax-ymin+1;
+ /* CAIRO_FORMAT_RGB24 each pixel is a 32-bit quantity, with the upper 8 bits unused.
+ Red, Green, and Blue are stored in the remaining 24 bits in that order. */
image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, rw, rh);
+ if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+ {
+ cairo_surface_destroy(image_surface);
+ return;
+ }
- data = (unsigned long*)cairo_image_surface_get_data(image_surface);
- offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+ data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+ stride = cairo_image_surface_get_stride(image_surface);
+ offset = stride/4 - rw;
pal_size = sCalcPalSize(iw*ih, index);
for (i=0; i<pal_size; i++)
@@ -1529,7 +1574,7 @@ static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
cairo_restore (ctxcanvas->cr);
}
-static void cdpixel(cdCtxCanvas *ctxcanvas, int x, int y, long int color)
+static void cdpixel(cdCtxCanvas *ctxcanvas, int x, int y, long color)
{
cairo_pattern_t* old_source = cairo_get_source(ctxcanvas->cr);
cairo_set_source_rgba(ctxcanvas->cr, cdCairoGetRed(color), cdCairoGetGreen(color), cdCairoGetBlue(color), cdCairoGetAlpha(color));
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 12:38:48 +0000