forked from AuroraMiddleware/gtk
135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
#include "opbuffer.h"
|
|
|
|
#include <string.h>
|
|
|
|
static guint op_sizes[OP_LAST] = {
|
|
0,
|
|
sizeof (OpOpacity),
|
|
sizeof (OpColor),
|
|
sizeof (OpMatrix),
|
|
sizeof (OpMatrix),
|
|
sizeof (OpProgram),
|
|
sizeof (OpRenderTarget),
|
|
sizeof (OpClip),
|
|
sizeof (OpViewport),
|
|
sizeof (OpTexture),
|
|
sizeof (OpRepeat),
|
|
sizeof (OpLinearGradient),
|
|
sizeof (OpRadialGradient),
|
|
sizeof (OpColorMatrix),
|
|
sizeof (OpBlur),
|
|
sizeof (OpShadow),
|
|
sizeof (OpOutsetShadow),
|
|
sizeof (OpBorder),
|
|
sizeof (OpBorder),
|
|
sizeof (OpBorder),
|
|
sizeof (OpCrossFade),
|
|
sizeof (OpShadow),
|
|
0,
|
|
sizeof (OpDraw),
|
|
sizeof (OpDumpFrameBuffer),
|
|
sizeof (OpDebugGroup),
|
|
0,
|
|
sizeof (OpBlend),
|
|
};
|
|
|
|
void
|
|
op_buffer_init (OpBuffer *buffer)
|
|
{
|
|
static gsize initialized = FALSE;
|
|
|
|
if (g_once_init_enter (&initialized))
|
|
{
|
|
guint i;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (op_sizes); i++)
|
|
{
|
|
guint size = op_sizes[i];
|
|
|
|
if (size > 0)
|
|
{
|
|
/* Round all op entry sizes to the nearest 16 to ensure
|
|
* that we guarantee proper alignments for all op entries.
|
|
* This is only done once on first use.
|
|
*/
|
|
#define CHECK_SIZE(s) else if (size < (s)) { size = s; }
|
|
if (0) {}
|
|
CHECK_SIZE (16)
|
|
CHECK_SIZE (32)
|
|
CHECK_SIZE (48)
|
|
CHECK_SIZE (64)
|
|
CHECK_SIZE (80)
|
|
CHECK_SIZE (96)
|
|
CHECK_SIZE (112)
|
|
CHECK_SIZE (128)
|
|
CHECK_SIZE (144)
|
|
CHECK_SIZE (160)
|
|
CHECK_SIZE (176)
|
|
CHECK_SIZE (192)
|
|
else g_assert_not_reached ();
|
|
#undef CHECK_SIZE
|
|
|
|
op_sizes[i] = size;
|
|
}
|
|
}
|
|
|
|
g_once_init_leave (&initialized, TRUE);
|
|
}
|
|
|
|
memset (buffer, 0, sizeof *buffer);
|
|
|
|
buffer->buflen = 4096;
|
|
buffer->bufpos = 0;
|
|
buffer->buf = g_malloc (buffer->buflen);
|
|
buffer->index = g_array_new (FALSE, FALSE, sizeof (OpBufferEntry));
|
|
|
|
/* Add dummy entry to guarantee non-empty index */
|
|
op_buffer_add (buffer, OP_NONE);
|
|
}
|
|
|
|
void
|
|
op_buffer_destroy (OpBuffer *buffer)
|
|
{
|
|
g_free (buffer->buf);
|
|
g_array_unref (buffer->index);
|
|
}
|
|
|
|
void
|
|
op_buffer_clear (OpBuffer *buffer)
|
|
{
|
|
if (buffer->index->len > 1)
|
|
g_array_remove_range (buffer->index, 1, buffer->index->len - 1);
|
|
buffer->bufpos = 0;
|
|
}
|
|
|
|
static inline void
|
|
ensure_buffer_space_for (OpBuffer *buffer,
|
|
guint size)
|
|
{
|
|
if G_UNLIKELY (buffer->bufpos + size >= buffer->buflen)
|
|
{
|
|
buffer->buflen *= 2;
|
|
buffer->buf = g_realloc (buffer->buf, buffer->buflen);
|
|
}
|
|
}
|
|
|
|
gpointer
|
|
op_buffer_add (OpBuffer *buffer,
|
|
OpKind kind)
|
|
{
|
|
guint size = op_sizes[kind];
|
|
OpBufferEntry entry;
|
|
|
|
entry.pos = buffer->bufpos;
|
|
entry.kind = kind;
|
|
|
|
if (size > 0)
|
|
ensure_buffer_space_for (buffer, size);
|
|
|
|
g_array_append_val (buffer->index, entry);
|
|
|
|
buffer->bufpos += size;
|
|
|
|
return &buffer->buf[entry.pos];
|
|
}
|