diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/ply-video-buffer.c | 57 | ||||
| -rw-r--r-- | src/ply-video-buffer.h | 2 |
2 files changed, 46 insertions, 13 deletions
diff --git a/src/ply-video-buffer.c b/src/ply-video-buffer.c index ca23707..30cbeb9 100644 --- a/src/ply-video-buffer.c +++ b/src/ply-video-buffer.c @@ -70,6 +70,8 @@ struct _PlyVideoBuffer unsigned int bytes_per_pixel; PlyVideoBufferArea area; PlyVideoBufferArea area_to_flush; + + uint32_t is_paused : 1; }; static bool ply_video_buffer_open_device (PlyVideoBuffer *buffer); @@ -330,13 +332,16 @@ ply_video_buffer_blend_value_at_pixel (PlyVideoBuffer *buffer, new_alpha = (pixel_value >> 24) / 255.0; new_red = ((pixel_value >> 16) & 0xff) / 255.0; + new_red *= new_alpha; new_green = ((pixel_value >> 8) & 0xff) / 255.0; + new_green *= new_alpha; new_blue = (pixel_value & 0xff) / 255.0; + new_blue *= new_alpha; - new_red = new_red * new_alpha + old_red * old_alpha * (1.0 - new_alpha); - new_green = new_green * new_alpha + old_green * old_alpha * (1.0 - new_alpha); - new_blue = new_blue * new_alpha + old_blue * old_alpha * (1.0 - new_alpha); - new_alpha = new_alpha * (1.0 - old_alpha); + new_red = new_red + old_red * (1.0 - new_alpha); + new_green = new_green + old_green * (1.0 - new_alpha); + new_blue = new_blue + old_blue * (1.0 - new_alpha); + new_alpha = new_alpha + (1.0 - old_alpha); new_red = CLAMP (new_red * 255.0, 0, 255.0); new_green = CLAMP (new_green * 255.0, 0, 255.0); @@ -358,11 +363,12 @@ ply_video_buffer_set_area_to_pixel_value (PlyVideoBuffer *buffer, { long row, column; - for (row = 0; row < area->height; row++) + for (row = area->y; row < area->y + area->height; row++) { - for (column = 0; column < area->width; column++) + for (column = area->x; column < area->x + area->width; column++) { - ply_video_buffer_set_value_at_pixel (buffer, column, row, + ply_video_buffer_set_value_at_pixel (buffer, + column, row, pixel_value); } } @@ -375,11 +381,12 @@ ply_video_buffer_blend_area_with_pixel_value (PlyVideoBuffer *buffer, { long row, column; - for (row = 0; row < area->height; row++) + for (row = area->y; row < area->y + area->height; row++) { - for (column = 0; column < area->width; column++) + for (column = area->x; column < area->x + area->width; column++) { - ply_video_buffer_blend_value_at_pixel (buffer, column, row, + ply_video_buffer_blend_value_at_pixel (buffer, + column, row, pixel_value); } } @@ -412,7 +419,12 @@ ply_video_buffer_flush (PlyVideoBuffer *buffer) unsigned long start_offset; size_t size; - bytes_per_row = buffer->bytes_per_pixel * buffer->area.width; + assert (buffer != NULL); + + if (buffer->is_paused) + return true; + + bytes_per_row = buffer->bytes_per_pixel * buffer->area_to_flush.width; start_offset = (buffer->area_to_flush.y * bytes_per_row) + (buffer->area_to_flush.x * buffer->bytes_per_pixel); size = buffer->area_to_flush.width * buffer->area_to_flush.height @@ -447,6 +459,8 @@ ply_video_buffer_new (const char *device_name) buffer->layout.address = MAP_FAILED; buffer->shadow_layout.address = NULL; + buffer->is_paused = false; + return buffer; } @@ -509,6 +523,23 @@ out: return is_open; } +void +ply_video_buffer_pause_updates (PlyVideoBuffer *buffer) +{ + assert (buffer != NULL); + + buffer->is_paused = true; +} + +bool +ply_video_buffer_unpause_updates (PlyVideoBuffer *buffer) +{ + assert (buffer != NULL); + + buffer->is_paused = false; + return ply_video_buffer_flush (buffer); +} + bool ply_video_buffer_device_is_open (PlyVideoBuffer *buffer) { @@ -618,9 +649,9 @@ ply_video_buffer_fill_with_argb32_data (PlyVideoBuffer *buffer, if (area == NULL) area = &buffer->area; - for (row = y; row < height; row++) + for (row = y; row < y + height; row++) { - for (column = x; column < width; column++) + for (column = x; column < x + width; column++) { uint8_t alpha; diff --git a/src/ply-video-buffer.h b/src/ply-video-buffer.h index d84f30f..1e6265a 100644 --- a/src/ply-video-buffer.h +++ b/src/ply-video-buffer.h @@ -41,6 +41,8 @@ struct _PlyVideoBufferArea PlyVideoBuffer *ply_video_buffer_new (const char *device_name); void ply_video_buffer_free (PlyVideoBuffer *buffer); bool ply_video_buffer_open (PlyVideoBuffer *buffer); +void ply_video_buffer_pause_updates (PlyVideoBuffer *buffer); +bool ply_video_buffer_unpause_updates (PlyVideoBuffer *buffer); bool ply_video_buffer_device_is_open (PlyVideoBuffer *buffer); char *ply_video_buffer_get_device_name (PlyVideoBuffer *buffer); void ply_video_buffer_set_device_name (PlyVideoBuffer *buffer, |