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textrender: Add support for ARGB and alignment properties

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Fixes bug #581571.
This commit is contained in:
Kapil Agrawal 2009-05-07 16:48:08 +02:00 committed by Sebastian Dröge
parent ce95857718
commit 2ddf7c8e13
2 changed files with 353 additions and 15 deletions
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317
ext/pango/gsttextrender.c
View file

@ -57,18 +57,36 @@ GST_ELEMENT_DETAILS ("Text renderer",
"David Schleef <ds@schleef.org>, "
"Ronald S. Bultje <rbultje@ronald.bitfreak.net>");
#define DEFAULT_PROP_VALIGNMENT GST_TEXT_RENDER_VALIGN_BASELINE
#define DEFAULT_PROP_HALIGNMENT GST_TEXT_RENDER_HALIGN_CENTER
#define DEFAULT_PROP_LINE_ALIGNMENT GST_TEXT_RENDER_LINE_ALIGN_CENTER
#define DEFAULT_PROP_XPAD 25
#define DEFAULT_PROP_YPAD 25
#define DEFAULT_RENDER_WIDTH 720
#define DEFAULT_RENDER_HEIGHT 576
enum
{
ARG_0,
PROP_HALIGNMENT,
PROP_VALIGNMENT,
PROP_LINE_ALIGNMENT,
PROP_XPAD,
PROP_YPAD,
ARG_FONT_DESC
};
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV"))
GST_STATIC_CAPS ("video/x-raw-yuv, format = (fourcc) AYUV; "
"video/x-raw-rgb, "
"bpp = (int) 32, endianness = (int) 4321, red_mask = (int) 16711680, "
"green_mask = (int) 65280, blue_mask = (int) 255, "
" alpha_mask = (int) -16777216, depth = (int) 32")
);
static GstStaticPadTemplate sink_template_factory =
@ -78,11 +96,71 @@ static GstStaticPadTemplate sink_template_factory =
GST_STATIC_CAPS ("text/x-pango-markup; text/plain")
);
#define GST_TYPE_TEXT_RENDER_VALIGN (gst_text_render_valign_get_type())
static GType
gst_text_render_valign_get_type (void)
{
static GType text_render_valign_type = 0;
static const GEnumValue text_render_valign[] = {
{GST_TEXT_RENDER_VALIGN_BASELINE, "baseline", "baseline"},
{GST_TEXT_RENDER_VALIGN_BOTTOM, "bottom", "bottom"},
{GST_TEXT_RENDER_VALIGN_TOP, "top", "top"},
{0, NULL, NULL},
};
if (!text_render_valign_type) {
text_render_valign_type =
g_enum_register_static ("GstTextRenderVAlign", text_render_valign);
}
return text_render_valign_type;
}
#define GST_TYPE_TEXT_RENDER_HALIGN (gst_text_render_halign_get_type())
static GType
gst_text_render_halign_get_type (void)
{
static GType text_render_halign_type = 0;
static const GEnumValue text_render_halign[] = {
{GST_TEXT_RENDER_HALIGN_LEFT, "left", "left"},
{GST_TEXT_RENDER_HALIGN_CENTER, "center", "center"},
{GST_TEXT_RENDER_HALIGN_RIGHT, "right", "right"},
{0, NULL, NULL},
};
if (!text_render_halign_type) {
text_render_halign_type =
g_enum_register_static ("GstTextRenderHAlign", text_render_halign);
}
return text_render_halign_type;
}
#define GST_TYPE_TEXT_RENDER_LINE_ALIGN (gst_text_render_line_align_get_type())
static GType
gst_text_render_line_align_get_type (void)
{
static GType text_render_line_align_type = 0;
static const GEnumValue text_render_line_align[] = {
{GST_TEXT_RENDER_LINE_ALIGN_LEFT, "left", "left"},
{GST_TEXT_RENDER_LINE_ALIGN_CENTER, "center", "center"},
{GST_TEXT_RENDER_LINE_ALIGN_RIGHT, "right", "right"},
{0, NULL, NULL}
};
if (!text_render_line_align_type) {
text_render_line_align_type =
g_enum_register_static ("GstTextRenderLineAlign",
text_render_line_align);
}
return text_render_line_align_type;
}
GST_BOILERPLATE (GstTextRender, gst_text_render, GstElement, GST_TYPE_ELEMENT);
static void gst_text_render_finalize (GObject * object);
static void gst_text_render_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_text_render_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void
gst_text_render_base_init (gpointer g_class)
@ -110,6 +188,7 @@ gst_text_render_class_init (GstTextRenderClass * klass)
gobject_class->finalize = gst_text_render_finalize;
gobject_class->set_property = gst_text_render_set_property;
gobject_class->get_property = gst_text_render_get_property;
klass->pango_context = pango_ft2_get_context (72, 72);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FONT_DESC,
@ -119,6 +198,27 @@ gst_text_render_class_init (GstTextRenderClass * klass)
"See documentation of "
"pango_font_description_from_string"
" for syntax.", "", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VALIGNMENT,
g_param_spec_enum ("valignment", "vertical alignment",
"Vertical alignment of the text", GST_TYPE_TEXT_RENDER_VALIGN,
DEFAULT_PROP_VALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HALIGNMENT,
g_param_spec_enum ("halignment", "horizontal alignment",
"Horizontal alignment of the text", GST_TYPE_TEXT_RENDER_HALIGN,
DEFAULT_PROP_HALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_XPAD,
g_param_spec_int ("xpad", "horizontal paddding",
"Horizontal paddding when using left/right alignment", 0, G_MAXINT,
DEFAULT_PROP_XPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_YPAD,
g_param_spec_int ("ypad", "vertical padding",
"Vertical padding when using top/bottom alignment", 0, G_MAXINT,
DEFAULT_PROP_YPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LINE_ALIGNMENT,
g_param_spec_enum ("line-alignment", "line alignment",
"Alignment of text lines relative to each other.",
GST_TYPE_TEXT_RENDER_LINE_ALIGN, DEFAULT_PROP_LINE_ALIGNMENT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
@ -164,6 +264,31 @@ gst_text_render_render_text (GstTextRender * render)
render->baseline_y = ink_rect.y;
}
static void
gst_text_render_check_argb (GstTextRender * render)
{
GstCaps *peer_caps;
peer_caps = gst_pad_get_allowed_caps (render->srcpad);
if (G_LIKELY (peer_caps)) {
guint i = 0, n = 0;
n = gst_caps_get_size (peer_caps);
GST_DEBUG_OBJECT (render, "peer allowed caps (%u structure(s)) are %"
GST_PTR_FORMAT, n, peer_caps);
for (i = 0; i < n; i++) {
GstStructure *s = gst_caps_get_structure (peer_caps, i);
/* Check if the peer pad support ARGB format, if yes change caps */
if (gst_structure_has_name (s, "video/x-raw-rgb") &&
gst_structure_has_field (s, "alpha_mask")) {
render->use_ARGB = TRUE;
}
}
gst_caps_unref (peer_caps);
render->check_ARGB = TRUE;
}
}
static gboolean
gst_text_render_setcaps (GstPad * pad, GstCaps * caps)
{
@ -184,6 +309,8 @@ gst_text_render_setcaps (GstPad * pad, GstCaps * caps)
ret = TRUE;
}
gst_text_render_check_argb (render);
gst_object_unref (render);
return ret;
}
@ -195,8 +322,8 @@ gst_text_render_fixate_caps (GstPad * pad, GstCaps * caps)
GstStructure *s = gst_caps_get_structure (caps, 0);
GST_DEBUG ("Fixating caps %" GST_PTR_FORMAT, caps);
gst_structure_fixate_field_nearest_int (s, "width", render->bitmap.width);
gst_structure_fixate_field_nearest_int (s, "height", render->bitmap.rows);
gst_structure_fixate_field_nearest_int (s, "width", render->width);
gst_structure_fixate_field_nearest_int (s, "height", render->height);
GST_DEBUG ("Fixated to %" GST_PTR_FORMAT, caps);
gst_object_unref (render);
@ -204,23 +331,30 @@ gst_text_render_fixate_caps (GstPad * pad, GstCaps * caps)
static void
gst_text_renderer_bitmap_to_ayuv (GstTextRender * render, FT_Bitmap * bitmap,
guchar * pixbuf)
guchar * pixbuf, gint x0, gint x1, gint y0, gint y1)
{
int y; /* text bitmap coordinates */
int rowinc, bit_rowinc;
guchar *p, *bitp;
guchar v;
x0 = CLAMP (x0, 0, render->width);
x1 = CLAMP (x1, 0, render->width);
y0 = CLAMP (y0, 0, render->height);
y1 = CLAMP (y1, 0, render->height);
rowinc = render->width - bitmap->width;
bit_rowinc = bitmap->pitch - bitmap->width;
bitp = bitmap->buffer;
p = pixbuf;
p = pixbuf + ((x0 + (render->width * y0)) * 4);
for (y = 0; y < bitmap->rows; y++) {
for (y = y0; y < y1; y++) {
int n;
for (n = bitmap->width; n > 0; --n) {
for (n = x0; n < x1; n++) {
v = *bitp;
if (v) {
p[0] = v;
@ -236,6 +370,46 @@ gst_text_renderer_bitmap_to_ayuv (GstTextRender * render, FT_Bitmap * bitmap,
}
}
static void
gst_text_renderer_bitmap_to_argb (GstTextRender * render, FT_Bitmap * bitmap,
guchar * pixbuf, gint x0, gint x1, gint y0, gint y1)
{
int y; /* text bitmap coordinates */
int rowinc, bit_rowinc;
guchar *p, *bitp;
guchar v;
x0 = CLAMP (x0, 0, render->width);
x1 = CLAMP (x1, 0, render->width);
y0 = CLAMP (y0, 0, render->height);
y1 = CLAMP (y1, 0, render->height);
rowinc = render->width - bitmap->width;
bit_rowinc = bitmap->pitch - bitmap->width;
bitp = bitmap->buffer;
p = pixbuf + ((x0 + (render->width * y0)) * 4);
for (y = y0; y < y1; y++) {
int n;
for (n = x0; n < x1; n++) {
v = *bitp;
if (v) {
p[0] = v;
p[1] = 255;
p[2] = 255;
p[3] = 255;
}
p += 4;
bitp++;
}
p += rowinc * 4;
bitp += bit_rowinc;
}
}
static GstFlowReturn
gst_text_render_chain (GstPad * pad, GstBuffer * inbuf)
@ -247,6 +421,7 @@ gst_text_render_chain (GstPad * pad, GstBuffer * inbuf)
guint8 *data = GST_BUFFER_DATA (inbuf);
guint size = GST_BUFFER_SIZE (inbuf);
gint n;
gint xpos, ypos;
render = GST_TEXT_RENDER (gst_pad_get_parent (pad));
@ -262,10 +437,28 @@ gst_text_render_chain (GstPad * pad, GstBuffer * inbuf)
pango_layout_set_markup (render->layout, (gchar *) data, size);
gst_text_render_render_text (render);
caps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'), "width", G_TYPE_INT,
render->bitmap.width, "height", G_TYPE_INT, render->bitmap.rows,
"framerate", GST_TYPE_FRACTION, 1, 1, NULL);
if (G_UNLIKELY (!render->check_ARGB)) {
gst_text_render_check_argb (render);
}
if (!render->use_ARGB) {
caps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'), "width", G_TYPE_INT,
render->width, "height", G_TYPE_INT, render->height,
"framerate", GST_TYPE_FRACTION, 1, 1, NULL);
} else {
caps = gst_caps_new_simple ("video/x-raw-rgb",
"width", G_TYPE_INT, render->width,
"height", G_TYPE_INT, render->height,
"framerate", GST_TYPE_FRACTION, 0, 1,
"bpp", G_TYPE_INT, 32,
"depth", G_TYPE_INT, 32,
"red_mask", G_TYPE_INT, 16711680,
"green_mask", G_TYPE_INT, 65280,
"blue_mask", G_TYPE_INT, 255,
"alpha_mask", G_TYPE_INT, -16777216,
"endianness", G_TYPE_INT, G_BIG_ENDIAN, NULL);
}
if (!gst_pad_set_caps (render->srcpad, caps)) {
gst_caps_unref (caps);
@ -274,8 +467,7 @@ gst_text_render_chain (GstPad * pad, GstBuffer * inbuf)
goto done;
}
GST_DEBUG ("Allocating AYUV buffer WxH = %dx%d", render->width,
render->height);
GST_DEBUG ("Allocating buffer WxH = %dx%d", render->width, render->height);
ret =
gst_pad_alloc_buffer_and_set_caps (render->srcpad, GST_BUFFER_OFFSET_NONE,
render->width * render->height * 4, caps, &outbuf);
@ -292,8 +484,43 @@ gst_text_render_chain (GstPad * pad, GstBuffer * inbuf)
data[n * 4 + 2] = data[n * 4 + 3] = 128;
}
switch (render->halign) {
case GST_TEXT_RENDER_HALIGN_LEFT:
xpos = render->xpad;
break;
case GST_TEXT_RENDER_HALIGN_CENTER:
xpos = (render->width - render->bitmap.width) / 2;
break;
case GST_TEXT_RENDER_HALIGN_RIGHT:
xpos = render->width - render->bitmap.width - render->xpad;
break;
default:
xpos = 0;
}
switch (render->valign) {
case GST_TEXT_RENDER_VALIGN_BOTTOM:
ypos = render->height - render->bitmap.rows - render->ypad;
break;
case GST_TEXT_RENDER_VALIGN_BASELINE:
ypos = render->height - (render->bitmap.rows + render->ypad);
break;
case GST_TEXT_RENDER_VALIGN_TOP:
ypos = render->ypad;
break;
default:
ypos = render->ypad;
break;
}
if (render->bitmap.buffer) {
gst_text_renderer_bitmap_to_ayuv (render, &render->bitmap, data);
if (render->use_ARGB) {
gst_text_renderer_bitmap_to_argb (render, &render->bitmap, data, xpos,
xpos + render->bitmap.width, ypos, ypos + render->bitmap.rows);
} else {
gst_text_renderer_bitmap_to_ayuv (render, &render->bitmap, data, xpos,
xpos + render->bitmap.width, ypos, ypos + render->bitmap.rows);
}
}
ret = gst_pad_push (render->srcpad, outbuf);
@ -340,11 +567,26 @@ gst_text_render_init (GstTextRender * render, GstTextRenderClass * klass)
GST_DEBUG_FUNCPTR (gst_text_render_fixate_caps));
gst_pad_set_setcaps_function (render->srcpad,
GST_DEBUG_FUNCPTR (gst_text_render_setcaps));
gst_element_add_pad (GST_ELEMENT (render), render->srcpad);
render->line_align = DEFAULT_PROP_LINE_ALIGNMENT;
render->layout =
pango_layout_new (GST_TEXT_RENDER_GET_CLASS (render)->pango_context);
pango_layout_set_alignment (render->layout,
(PangoAlignment) render->line_align);
memset (&render->bitmap, 0, sizeof (render->bitmap));
render->halign = DEFAULT_PROP_HALIGNMENT;
render->valign = DEFAULT_PROP_VALIGNMENT;
render->xpad = DEFAULT_PROP_XPAD;
render->ypad = DEFAULT_PROP_YPAD;
render->width = DEFAULT_RENDER_WIDTH;
render->height = DEFAULT_RENDER_HEIGHT;
render->use_ARGB = FALSE;
render->check_ARGB = FALSE;
}
static void
@ -354,6 +596,23 @@ gst_text_render_set_property (GObject * object, guint prop_id,
GstTextRender *render = GST_TEXT_RENDER (object);
switch (prop_id) {
case PROP_VALIGNMENT:
render->valign = g_value_get_enum (value);
break;
case PROP_HALIGNMENT:
render->halign = g_value_get_enum (value);
break;
case PROP_LINE_ALIGNMENT:
render->line_align = g_value_get_enum (value);
pango_layout_set_alignment (render->layout,
(PangoAlignment) render->line_align);
break;
case PROP_XPAD:
render->xpad = g_value_get_int (value);
break;
case PROP_YPAD:
render->ypad = g_value_get_int (value);
break;
case ARG_FONT_DESC:
{
PangoFontDescription *desc;
@ -377,3 +636,31 @@ gst_text_render_set_property (GObject * object, guint prop_id,
break;
}
}
static void
gst_text_render_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTextRender *render = GST_TEXT_RENDER (object);
switch (prop_id) {
case PROP_VALIGNMENT:
g_value_set_enum (value, render->valign);
break;
case PROP_HALIGNMENT:
g_value_set_enum (value, render->halign);
break;
case PROP_LINE_ALIGNMENT:
g_value_set_enum (value, render->line_align);
break;
case PROP_XPAD:
g_value_set_int (value, render->xpad);
break;
case PROP_YPAD:
g_value_set_int (value, render->ypad);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

51
ext/pango/gsttextrender.h
View file

@ -21,6 +21,48 @@ G_BEGIN_DECLS
typedef struct _GstTextRender GstTextRender;
typedef struct _GstTextRenderClass GstTextRenderClass;
/**
* GstTextRenderVAlign:
* @GST_TEXT_RENDER_VALIGN_BASELINE: draw text on the baseline
* @GST_TEXT_RENDER_VALIGN_BOTTOM: draw text on the bottom
* @GST_TEXT_RENDER_VALIGN_TOP: draw test on top
*
* Vertical alignment of the text.
*/
typedef enum {
GST_TEXT_RENDER_VALIGN_BASELINE,
GST_TEXT_RENDER_VALIGN_BOTTOM,
GST_TEXT_RENDER_VALIGN_TOP
} GstTextRenderVAlign;
/**
* GstTextRenderHAlign:
* @GST_TEXT_RENDER_HALIGN_LEFT: align text left
* @GST_TEXT_RENDER_HALIGN_CENTER: align text center
* @GST_TEXT_RENDER_HALIGN_RIGHT: align text right
*
* Horizontal alignment of the text.
*/
typedef enum {
GST_TEXT_RENDER_HALIGN_LEFT,
GST_TEXT_RENDER_HALIGN_CENTER,
GST_TEXT_RENDER_HALIGN_RIGHT
} GstTextRenderHAlign;
/**
* GstTextRenderLineAlign:
* @GST_TEXT_RENDER_LINE_ALIGN_LEFT: lines are left-aligned
* @GST_TEXT_RENDER_LINE_ALIGN_CENTER: lines are center-aligned
* @GST_TEXT_RENDER_LINE_ALIGN_RIGHT: lines are right-aligned
*
* Alignment of text lines relative to each other
*/
typedef enum {
GST_TEXT_RENDER_LINE_ALIGN_LEFT = PANGO_ALIGN_LEFT,
GST_TEXT_RENDER_LINE_ALIGN_CENTER = PANGO_ALIGN_CENTER,
GST_TEXT_RENDER_LINE_ALIGN_RIGHT = PANGO_ALIGN_RIGHT
} GstTextRenderLineAlign;
/**
* GstTextRender:
*
@ -36,6 +78,15 @@ struct _GstTextRender {
FT_Bitmap bitmap;
gint bitmap_buffer_size;
gint baseline_y;
gboolean use_ARGB;
gboolean check_ARGB;
GstTextRenderVAlign valign;
GstTextRenderHAlign halign;
GstTextRenderLineAlign line_align;
gint xpad;
gint ypad;
};
struct _GstTextRenderClass {