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Improvement: Pregenerate alpha pictures

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Pregenerate alpha pictures to save time when painting. Add --alpha-step
to control the step of alpha picture generation (the opacity difference
between two consecutively generated alpha pictures).
This commit is contained in:
Richard Grenville
2012-10-13 18:46:59 +08:00
parent 72ea4b5f47
commit 07e4420ab4
4 changed files with 55 additions and 37 deletions
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11
src/compton.h
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@ -221,8 +221,6 @@ typedef struct _win {
opacity_t opacity;
/// Target window opacity.
opacity_t opacity_tgt;
/// Opacity of current alpha_pict.
opacity_t opacity_cur;
/// Cached value of opacity window attribute.
opacity_t opacity_prop;
/// Cached value of opacity window attribute on client window. For
@ -244,8 +242,6 @@ typedef struct _win {
// Frame-opacity-related members
/// Current window frame opacity. Affected by window opacity.
double frame_opacity;
/// Opacity of current frame_alpha_pict.
opacity_t frame_opacity_cur;
/// Alpha mask Picture to render window frame with opacity.
Picture frame_alpha_pict;
/// Frame widths. Determined by client window attributes.
@ -256,8 +252,6 @@ typedef struct _win {
Bool shadow;
/// Opacity of the shadow. Affected by window opacity and frame opacity.
double shadow_opacity;
/// Opacity of current shadow_pict.
double shadow_opacity_cur;
/// X offset of shadow. Affected by commandline argument.
int shadow_dx;
/// Y offset of shadow. Affected by commandline argument.
@ -359,6 +353,8 @@ typedef struct _options {
Bool detect_client_opacity;
/// How much to dim an inactive window. 0.0 - 1.0, 0 to disable.
double inactive_dim;
/// Step for pregenerating alpha pictures. 0.01 - 1.0.
double alpha_step;
// Calculated
/// Whether compton needs to track focus changes.
@ -1125,3 +1121,6 @@ vsync_opengl_wait(void);
static Bool
vsync_wait(Display *dpy, struct pollfd *fd, int timeout);
static void
init_alpha_picts(Display *dpy);