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[pixel-buffer] Add fill buffer with buffer functions

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These draw the content of one buffer into another. This is cleaner than using
the raw data and passing the width and height of the data separately.
This commit is contained in:
Charlie Brej 2010-04-18 17:14:21 +01:00
parent 1cce2033ea
commit d93ae6cdc7
2 changed files with 124 additions and 0 deletions
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102
src/libply-splash-core/ply-pixel-buffer.c
View file

@ -603,6 +603,108 @@ ply_pixel_buffer_fill_with_argb32_data_with_clip (ply_pixel_buffer_t *buffer,
data, 1.0);
}
void
ply_pixel_buffer_fill_with_buffer_at_opacity_with_clip (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
ply_rectangle_t *clip_area,
float opacity)
{
unsigned long row, column;
uint8_t opacity_as_byte;
ply_rectangle_t cropped_area;
unsigned long x;
unsigned long y;
assert (canvas != NULL);
assert (source != NULL);
cropped_area.x = x_offset;
cropped_area.y = y_offset;
cropped_area.width = source->area.width;
cropped_area.height = source->area.height;
ply_pixel_buffer_crop_area_to_clip_area (canvas, &cropped_area, &cropped_area);
if (clip_area)
ply_rectangle_intersect (&cropped_area, clip_area, &cropped_area);
if (cropped_area.width == 0 || cropped_area.height == 0)
return;
x = cropped_area.x - x_offset;
y = cropped_area.y - y_offset;
opacity_as_byte = (uint8_t) (opacity * 255.0);
for (row = y; row < y + cropped_area.height; row++)
{
for (column = x; column < x + cropped_area.width; column++)
{
uint32_t pixel_value;
pixel_value = source->bytes[row * source->area.width + column];
pixel_value = make_pixel_value_translucent (pixel_value, opacity_as_byte);
if ((pixel_value >> 24) == 0x00)
continue;
ply_pixel_buffer_blend_value_at_pixel (canvas,
cropped_area.x + (column - x),
cropped_area.y + (row - y),
pixel_value);
}
}
ply_region_add_rectangle (canvas->updated_areas, &cropped_area);
}
void
ply_pixel_buffer_fill_with_buffer_at_opacity (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
float opacity)
{
ply_pixel_buffer_fill_with_buffer_at_opacity_with_clip (canvas,
source,
x_offset,
y_offset,
NULL,
opacity);
}
void
ply_pixel_buffer_fill_with_buffer_with_clip (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
ply_rectangle_t *clip_area)
{
ply_pixel_buffer_fill_with_buffer_at_opacity_with_clip (canvas,
source,
x_offset,
y_offset,
clip_area,
1.0);
}
void
ply_pixel_buffer_fill_with_buffer (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset)
{
ply_pixel_buffer_fill_with_buffer_at_opacity_with_clip (canvas,
source,
x_offset,
y_offset,
NULL,
1.0);
}
uint32_t *
ply_pixel_buffer_get_argb32_data (ply_pixel_buffer_t *buffer)
{

22
src/libply-splash-core/ply-pixel-buffer.h
View file

@ -87,6 +87,28 @@ void ply_pixel_buffer_fill_with_argb32_data_at_opacity_with_clip (ply_pixel_buff
uint32_t *data,
double opacity);
void ply_pixel_buffer_fill_with_buffer_at_opacity_with_clip (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
ply_rectangle_t *clip_area,
float opacity);
void ply_pixel_buffer_fill_with_buffer_at_opacity (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
float opacity);
void ply_pixel_buffer_fill_with_buffer_with_clip (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset,
ply_rectangle_t *clip_area);
void ply_pixel_buffer_fill_with_buffer (ply_pixel_buffer_t *canvas,
ply_pixel_buffer_t *source,
int x_offset,
int y_offset);
void ply_pixel_buffer_push_clip_area (ply_pixel_buffer_t *buffer,
ply_rectangle_t *clip_area);
void ply_pixel_buffer_pop_clip_area (ply_pixel_buffer_t *buffer);