diff options
Diffstat (limited to 'src/widgets/sp-color-slider.cpp')
| -rw-r--r-- | src/widgets/sp-color-slider.cpp | 749 |
1 files changed, 0 insertions, 749 deletions
diff --git a/src/widgets/sp-color-slider.cpp b/src/widgets/sp-color-slider.cpp deleted file mode 100644 index ab7e2cd84..000000000 --- a/src/widgets/sp-color-slider.cpp +++ /dev/null @@ -1,749 +0,0 @@ -/* - * A slider with colored background - * - * Author: - * Lauris Kaplinski <lauris@kaplinski.com> - * bulia byak <buliabyak@users.sf.net> - * - * Copyright (C) 2001-2002 Lauris Kaplinski - * - * This code is in public domain - */ - -#include <gtk/gtk.h> -#include "sp-color-scales.h" -#include "sp-color-slider.h" -#include "preferences.h" - -#define SLIDER_WIDTH 96 -#define SLIDER_HEIGHT 8 -#define ARROW_SIZE 7 - -enum { - GRABBED, - DRAGGED, - RELEASED, - CHANGED, - LAST_SIGNAL -}; - -static void sp_color_slider_dispose(GObject *object); - -static void sp_color_slider_realize (GtkWidget *widget); -static void sp_color_slider_size_request (GtkWidget *widget, GtkRequisition *requisition); - -#if GTK_CHECK_VERSION(3,0,0) -static void sp_color_slider_get_preferred_width(GtkWidget *widget, - gint *minimal_width, - gint *natural_width); - -static void sp_color_slider_get_preferred_height(GtkWidget *widget, - gint *minimal_height, - gint *natural_height); -#else -static gboolean sp_color_slider_expose(GtkWidget *widget, GdkEventExpose *event); -#endif - -static void sp_color_slider_size_allocate (GtkWidget *widget, GtkAllocation *allocation); - -static gboolean sp_color_slider_draw(GtkWidget *widget, cairo_t *cr); - -static gint sp_color_slider_button_press (GtkWidget *widget, GdkEventButton *event); -static gint sp_color_slider_button_release (GtkWidget *widget, GdkEventButton *event); -static gint sp_color_slider_motion_notify (GtkWidget *widget, GdkEventMotion *event); - -static void sp_color_slider_adjustment_changed (GtkAdjustment *adjustment, SPColorSlider *slider); -static void sp_color_slider_adjustment_value_changed (GtkAdjustment *adjustment, SPColorSlider *slider); - -static const guchar *sp_color_slider_render_gradient (gint x0, gint y0, gint width, gint height, - gint c[], gint dc[], guint b0, guint b1, guint mask); -static const guchar *sp_color_slider_render_map (gint x0, gint y0, gint width, gint height, - guchar *map, gint start, gint step, guint b0, guint b1, guint mask); - -static guint slider_signals[LAST_SIGNAL] = {0}; - -G_DEFINE_TYPE(SPColorSlider, sp_color_slider, GTK_TYPE_WIDGET); - -static void sp_color_slider_class_init(SPColorSliderClass *klass) -{ - GObjectClass *object_class = G_OBJECT_CLASS(klass); - GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass); - - slider_signals[GRABBED] = g_signal_new ("grabbed", - G_TYPE_FROM_CLASS(object_class), - (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE), - G_STRUCT_OFFSET (SPColorSliderClass, grabbed), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); - slider_signals[DRAGGED] = g_signal_new ("dragged", - G_TYPE_FROM_CLASS(object_class), - (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE), - G_STRUCT_OFFSET (SPColorSliderClass, dragged), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); - slider_signals[RELEASED] = g_signal_new ("released", - G_TYPE_FROM_CLASS(object_class), - (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE), - G_STRUCT_OFFSET (SPColorSliderClass, released), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); - slider_signals[CHANGED] = g_signal_new ("changed", - G_TYPE_FROM_CLASS(object_class), - (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE), - G_STRUCT_OFFSET (SPColorSliderClass, changed), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); - - object_class->dispose = sp_color_slider_dispose; - - widget_class->realize = sp_color_slider_realize; -#if GTK_CHECK_VERSION(3,0,0) - widget_class->get_preferred_width = sp_color_slider_get_preferred_width; - widget_class->get_preferred_height = sp_color_slider_get_preferred_height; - widget_class->draw = sp_color_slider_draw; -#else - widget_class->size_request = sp_color_slider_size_request; - widget_class->expose_event = sp_color_slider_expose; -#endif - widget_class->size_allocate = sp_color_slider_size_allocate; -/* widget_class->draw_focus = sp_color_slider_draw_focus; */ -/* widget_class->draw_default = sp_color_slider_draw_default; */ - - widget_class->button_press_event = sp_color_slider_button_press; - widget_class->button_release_event = sp_color_slider_button_release; - widget_class->motion_notify_event = sp_color_slider_motion_notify; -} - -static void -sp_color_slider_init (SPColorSlider *slider) -{ - /* We are widget with window */ - gtk_widget_set_has_window (GTK_WIDGET(slider), TRUE); - - slider->dragging = FALSE; - - slider->adjustment = NULL; - slider->value = 0.0; - - slider->c0[0] = 0x00; - slider->c0[1] = 0x00; - slider->c0[2] = 0x00; - slider->c0[3] = 0xff; - - slider->cm[0] = 0xff; - slider->cm[1] = 0x00; - slider->cm[2] = 0x00; - slider->cm[3] = 0xff; - - slider->c1[0] = 0xff; - slider->c1[1] = 0xff; - slider->c1[2] = 0xff; - slider->c1[3] = 0xff; - - slider->b0 = 0x5f; - slider->b1 = 0xa0; - slider->bmask = 0x08; - - slider->map = NULL; -} - -static void sp_color_slider_dispose(GObject *object) -{ - SPColorSlider *slider = SP_COLOR_SLIDER (object); - - if (slider->adjustment) { - g_signal_handlers_disconnect_matched (G_OBJECT (slider->adjustment), G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, slider); - g_object_unref (slider->adjustment); - slider->adjustment = NULL; - } - - if (G_OBJECT_CLASS(sp_color_slider_parent_class)->dispose) - G_OBJECT_CLASS(sp_color_slider_parent_class)->dispose (object); -} - -static void -sp_color_slider_realize (GtkWidget *widget) -{ - GdkWindowAttr attributes; - gint attributes_mask; - GtkAllocation allocation; - - gtk_widget_get_allocation(widget, &allocation); - gtk_widget_set_realized (widget, TRUE); - - attributes.window_type = GDK_WINDOW_CHILD; - attributes.x = allocation.x; - attributes.y = allocation.y; - attributes.width = allocation.width; - attributes.height = allocation.height; - attributes.wclass = GDK_INPUT_OUTPUT; - attributes.visual = gdk_screen_get_system_visual(gdk_screen_get_default()); - -#if !GTK_CHECK_VERSION(3,0,0) - attributes.colormap = gdk_screen_get_system_colormap(gdk_screen_get_default()); -#endif - - attributes.event_mask = gtk_widget_get_events (widget); - attributes.event_mask |= (GDK_EXPOSURE_MASK | - GDK_BUTTON_PRESS_MASK | - GDK_BUTTON_RELEASE_MASK | - GDK_POINTER_MOTION_MASK | - GDK_ENTER_NOTIFY_MASK | - GDK_LEAVE_NOTIFY_MASK); -#if GTK_CHECK_VERSION(3,0,0) - attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL; -#else - attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; -#endif - - gtk_widget_set_window(widget, - gdk_window_new(gtk_widget_get_parent_window(widget), - &attributes, attributes_mask)); - - gdk_window_set_user_data(gtk_widget_get_window(widget), widget); - -#if !GTK_CHECK_VERSION(3,0,0) - // This doesn't do anything in GTK+ 3 - gtk_widget_set_style(widget, - gtk_style_attach(gtk_widget_get_style(widget), - gtk_widget_get_window(widget))); -#endif -} - -static void -sp_color_slider_size_request (GtkWidget *widget, GtkRequisition *requisition) -{ - GtkStyle *style = gtk_widget_get_style(widget); - requisition->width = SLIDER_WIDTH + style->xthickness * 2; - requisition->height = SLIDER_HEIGHT + style->ythickness * 2; -} - -#if GTK_CHECK_VERSION(3,0,0) -static void sp_color_slider_get_preferred_width(GtkWidget *widget, gint *minimal_width, gint *natural_width) -{ - GtkRequisition requisition; - sp_color_slider_size_request(widget, &requisition); - *minimal_width = *natural_width = requisition.width; -} - -static void sp_color_slider_get_preferred_height(GtkWidget *widget, gint *minimal_height, gint *natural_height) -{ - GtkRequisition requisition; - sp_color_slider_size_request(widget, &requisition); - *minimal_height = *natural_height = requisition.height; -} -#endif - -static void -sp_color_slider_size_allocate (GtkWidget *widget, GtkAllocation *allocation) -{ - gtk_widget_set_allocation(widget, allocation); - - if (gtk_widget_get_realized (widget)) { - /* Resize GdkWindow */ - gdk_window_move_resize(gtk_widget_get_window(widget), - allocation->x, allocation->y, - allocation->width, allocation->height); - } -} - -#if !GTK_CHECK_VERSION(3,0,0) -static gboolean sp_color_slider_expose(GtkWidget *widget, GdkEventExpose * /*event*/) -{ - gboolean result = FALSE; - - if (gtk_widget_is_drawable(widget)) { - GdkWindow *window = gtk_widget_get_window(widget); - cairo_t *cr = gdk_cairo_create(window); - result = sp_color_slider_draw(widget, cr); - cairo_destroy(cr); - } - - return result; -} -#endif - -static gint -sp_color_slider_button_press (GtkWidget *widget, GdkEventButton *event) -{ - SPColorSlider *slider; - - slider = SP_COLOR_SLIDER (widget); - - if (event->button == 1) { - GtkAllocation allocation; - gtk_widget_get_allocation(widget, &allocation); - gint cx, cw; - cx = gtk_widget_get_style(widget)->xthickness; - cw = allocation.width - 2 * cx; - g_signal_emit (G_OBJECT (slider), slider_signals[GRABBED], 0); - slider->dragging = TRUE; - slider->oldvalue = slider->value; - ColorScales::setScaled( slider->adjustment, CLAMP ((gfloat) (event->x - cx) / cw, 0.0, 1.0) ); - g_signal_emit (G_OBJECT (slider), slider_signals[DRAGGED], 0); - -#if GTK_CHECK_VERSION(3,0,0) - gdk_device_grab(gdk_event_get_device(reinterpret_cast<GdkEvent *>(event)), - gtk_widget_get_window(widget), - GDK_OWNERSHIP_NONE, - FALSE, - static_cast<GdkEventMask>(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK), - NULL, - event->time); -#else - gdk_pointer_grab(gtk_widget_get_window(widget), FALSE, - static_cast<GdkEventMask>(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK), - NULL, NULL, event->time); -#endif - } - - return FALSE; -} - -static gint -sp_color_slider_button_release (GtkWidget *widget, GdkEventButton *event) -{ - SPColorSlider *slider; - - slider = SP_COLOR_SLIDER (widget); - - if (event->button == 1) { - -#if GTK_CHECK_VERSION(3,0,0) - gdk_device_ungrab(gdk_event_get_device(reinterpret_cast<GdkEvent *>(event)), - gdk_event_get_time(reinterpret_cast<GdkEvent *>(event))); -#else - gdk_pointer_ungrab (event->time); -#endif - - slider->dragging = FALSE; - g_signal_emit (G_OBJECT (slider), slider_signals[RELEASED], 0); - if (slider->value != slider->oldvalue) g_signal_emit (G_OBJECT (slider), slider_signals[CHANGED], 0); - } - - return FALSE; -} - -static gint -sp_color_slider_motion_notify (GtkWidget *widget, GdkEventMotion *event) -{ - SPColorSlider *slider; - - slider = SP_COLOR_SLIDER (widget); - - if (slider->dragging) { - gint cx, cw; - GtkAllocation allocation; - gtk_widget_get_allocation(widget, &allocation); - cx = gtk_widget_get_style(widget)->xthickness; - cw = allocation.width - 2 * cx; - ColorScales::setScaled( slider->adjustment, CLAMP ((gfloat) (event->x - cx) / cw, 0.0, 1.0) ); - g_signal_emit (G_OBJECT (slider), slider_signals[DRAGGED], 0); - } - - return FALSE; -} - -GtkWidget *sp_color_slider_new(GtkAdjustment *adjustment) -{ - SPColorSlider *slider = SP_COLOR_SLIDER(g_object_new(SP_TYPE_COLOR_SLIDER, NULL)); - - sp_color_slider_set_adjustment (slider, adjustment); - - return GTK_WIDGET (slider); -} - -void sp_color_slider_set_adjustment(SPColorSlider *slider, GtkAdjustment *adjustment) -{ - g_return_if_fail (slider != NULL); - g_return_if_fail (SP_IS_COLOR_SLIDER (slider)); - - if (!adjustment) { - adjustment = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.01, 0.0, 0.0)); - } else { - gtk_adjustment_set_page_increment(adjustment, 0.0); - gtk_adjustment_set_page_size(adjustment, 0.0); - } - - if (slider->adjustment != adjustment) { - if (slider->adjustment) { - g_signal_handlers_disconnect_matched (G_OBJECT (slider->adjustment), G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, slider); - g_object_unref (slider->adjustment); - } - - slider->adjustment = adjustment; - g_object_ref (adjustment); - g_object_ref_sink (adjustment); - - g_signal_connect (G_OBJECT (adjustment), "changed", - G_CALLBACK (sp_color_slider_adjustment_changed), slider); - g_signal_connect (G_OBJECT (adjustment), "value_changed", - G_CALLBACK (sp_color_slider_adjustment_value_changed), slider); - - slider->value = ColorScales::getScaled( adjustment ); - - sp_color_slider_adjustment_changed (adjustment, slider); - } -} - -void -sp_color_slider_set_colors (SPColorSlider *slider, guint32 start, guint32 mid, guint32 end) -{ - g_return_if_fail (slider != NULL); - g_return_if_fail (SP_IS_COLOR_SLIDER (slider)); - - // Remove any map, if set - slider->map = 0; - - slider->c0[0] = start >> 24; - slider->c0[1] = (start >> 16) & 0xff; - slider->c0[2] = (start >> 8) & 0xff; - slider->c0[3] = start & 0xff; - - slider->cm[0] = mid >> 24; - slider->cm[1] = (mid >> 16) & 0xff; - slider->cm[2] = (mid >> 8) & 0xff; - slider->cm[3] = mid & 0xff; - - slider->c1[0] = end >> 24; - slider->c1[1] = (end >> 16) & 0xff; - slider->c1[2] = (end >> 8) & 0xff; - slider->c1[3] = end & 0xff; - - gtk_widget_queue_draw (GTK_WIDGET (slider)); -} - -void -sp_color_slider_set_map (SPColorSlider *slider, const guchar *map) -{ - g_return_if_fail (slider != NULL); - g_return_if_fail (SP_IS_COLOR_SLIDER (slider)); - - slider->map = const_cast<guchar *>(map); - - gtk_widget_queue_draw (GTK_WIDGET (slider)); -} - -void -sp_color_slider_set_background (SPColorSlider *slider, guint dark, guint light, guint size) -{ - g_return_if_fail (slider != NULL); - g_return_if_fail (SP_IS_COLOR_SLIDER (slider)); - - slider->b0 = dark; - slider->b1 = light; - slider->bmask = size; - - gtk_widget_queue_draw (GTK_WIDGET (slider)); -} - -static void -sp_color_slider_adjustment_changed (GtkAdjustment */*adjustment*/, SPColorSlider *slider) -{ - gtk_widget_queue_draw (GTK_WIDGET (slider)); -} - -static void -sp_color_slider_adjustment_value_changed (GtkAdjustment *adjustment, SPColorSlider *slider) -{ - GtkWidget *widget; - - widget = GTK_WIDGET (slider); - - if (slider->value != ColorScales::getScaled( adjustment )) { - gint cx, cy, cw, ch; - GtkStyle *style = gtk_widget_get_style(widget); - GtkAllocation allocation; - gtk_widget_get_allocation(widget, &allocation); - cx = style->xthickness; - cy = style->ythickness; - cw = allocation.width - 2 * cx; - ch = allocation.height - 2 * cy; - if ((gint) (ColorScales::getScaled( adjustment ) * cw) != (gint) (slider->value * cw)) { - gint ax, ay; - gfloat value; - value = slider->value; - slider->value = ColorScales::getScaled( adjustment ); - ax = (int)(cx + value * cw - ARROW_SIZE / 2 - 2); - ay = cy; - gtk_widget_queue_draw_area (widget, ax, ay, ARROW_SIZE + 4, ch); - ax = (int)(cx + slider->value * cw - ARROW_SIZE / 2 - 2); - ay = cy; - gtk_widget_queue_draw_area (widget, ax, ay, ARROW_SIZE + 4, ch); - } else { - slider->value = ColorScales::getScaled( adjustment ); - } - } -} - -static gboolean sp_color_slider_draw(GtkWidget *widget, cairo_t *cr) -{ - SPColorSlider *slider = SP_COLOR_SLIDER(widget); - - gboolean colorsOnTop = Inkscape::Preferences::get()->getBool("/options/workarounds/colorsontop", false); - - GtkAllocation allocation; - gtk_widget_get_allocation(widget, &allocation); - -#if GTK_CHECK_VERSION(3,0,0) - GtkStyleContext *context = gtk_widget_get_style_context(widget); -#else - GdkWindow *window = gtk_widget_get_window(widget); - GtkStyle *style = gtk_widget_get_style(widget); -#endif - - // Draw shadow - if (colorsOnTop) { -#if GTK_CHECK_VERSION(3,0,0) - gtk_render_frame(context, - cr, - 0, 0, - allocation.width, allocation.height); -#else - gtk_paint_shadow( style, window, - gtk_widget_get_state(widget), GTK_SHADOW_IN, - NULL, widget, "colorslider", - 0, 0, - allocation.width, allocation.height); -#endif - } - - /* Paintable part of color gradient area */ - GdkRectangle carea; - -#if GTK_CHECK_VERSION(3,0,0) - GtkBorder padding; - - gtk_style_context_get_padding(context, - gtk_widget_get_state_flags(widget), - &padding); - - carea.x = padding.left; - carea.y = padding.top; -#else - carea.x = style->xthickness; - carea.y = style->ythickness; -#endif - - carea.width = allocation.width - 2 * carea.x; - carea.height = allocation.height - 2 * carea.y; - - if (slider->map) { - /* Render map pixelstore */ - gint d = (1024 << 16) / carea.width; - gint s = 0; - - const guchar *b = sp_color_slider_render_map(0, 0, carea.width, carea.height, - slider->map, s, d, - slider->b0, slider->b1, slider->bmask); - - if (b != NULL && carea.width > 0) { - GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB, - 0, 8, carea.width, carea.height, carea.width * 3, NULL, NULL); - - gdk_cairo_set_source_pixbuf(cr, pb, carea.x, carea.y); - cairo_paint(cr); - g_object_unref(pb); - } - - } else { - gint c[4], dc[4]; - - /* Render gradient */ - - // part 1: from c0 to cm - if (carea.width > 0) { - for (gint i = 0; i < 4; i++) { - c[i] = slider->c0[i] << 16; - dc[i] = ((slider->cm[i] << 16) - c[i]) / (carea.width/2); - } - guint wi = carea.width/2; - const guchar *b = sp_color_slider_render_gradient(0, 0, wi, carea.height, - c, dc, slider->b0, slider->b1, slider->bmask); - - /* Draw pixelstore 1 */ - if (b != NULL && wi > 0) { - GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB, - 0, 8, wi, carea.height, wi * 3, NULL, NULL); - - gdk_cairo_set_source_pixbuf(cr, pb, carea.x, carea.y); - cairo_paint(cr); - g_object_unref(pb); - } - } - - // part 2: from cm to c1 - if (carea.width > 0) { - for (gint i = 0; i < 4; i++) { - c[i] = slider->cm[i] << 16; - dc[i] = ((slider->c1[i] << 16) - c[i]) / (carea.width/2); - } - guint wi = carea.width/2; - const guchar *b = sp_color_slider_render_gradient(carea.width/2, 0, wi, carea.height, - c, dc, - slider->b0, slider->b1, slider->bmask); - - /* Draw pixelstore 2 */ - if (b != NULL && wi > 0) { - GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB, - 0, 8, wi, carea.height, wi * 3, NULL, NULL); - - gdk_cairo_set_source_pixbuf(cr, pb, carea.width/2 + carea.x, carea.y); - cairo_paint(cr); - - g_object_unref(pb); - } - } - } - - /* Draw shadow */ - if (!colorsOnTop) { -#if GTK_CHECK_VERSION(3,0,0) - gtk_render_frame(context, - cr, - 0, 0, - allocation.width, allocation.height); -#else - gtk_paint_shadow( style, window, - gtk_widget_get_state(widget), GTK_SHADOW_IN, - NULL, widget, "colorslider", - 0, 0, - allocation.width, allocation.height); -#endif - } - - /* Draw arrow */ - gint x = (int)(slider->value * (carea.width - 1) - ARROW_SIZE / 2 + carea.x); - gint y1 = carea.y; - gint y2 = carea.y + carea.height - 1; - cairo_set_line_width(cr, 1.0); - - // Define top arrow - cairo_move_to(cr, x - 0.5, y1 + 0.5); - cairo_line_to(cr, x + ARROW_SIZE - 0.5, y1 + 0.5); - cairo_line_to(cr, x + (ARROW_SIZE-1)/2.0, y1 + ARROW_SIZE/2.0 + 0.5); - cairo_line_to(cr, x - 0.5, y1 + 0.5); - - // Define bottom arrow - cairo_move_to(cr, x - 0.5, y2 + 0.5); - cairo_line_to(cr, x + ARROW_SIZE - 0.5, y2 + 0.5); - cairo_line_to(cr, x + (ARROW_SIZE-1)/2.0, y2 - ARROW_SIZE/2.0 + 0.5); - cairo_line_to(cr, x - 0.5, y2 + 0.5); - - // Render both arrows - cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); - cairo_stroke_preserve(cr); - cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); - cairo_fill(cr); - - return FALSE; -} - -/* Colors are << 16 */ - -static const guchar * -sp_color_slider_render_gradient (gint x0, gint y0, gint width, gint height, - gint c[], gint dc[], guint b0, guint b1, guint mask) -{ - static guchar *buf = NULL; - static gint bs = 0; - guchar *dp; - gint x, y; - guint r, g, b, a; - - if (buf && (bs < width * height)) { - g_free (buf); - buf = NULL; - } - if (!buf) { - buf = g_new (guchar, width * height * 3); - bs = width * height; - } - - dp = buf; - r = c[0]; - g = c[1]; - b = c[2]; - a = c[3]; - for (x = x0; x < x0 + width; x++) { - gint cr, cg, cb, ca; - guchar *d; - cr = r >> 16; - cg = g >> 16; - cb = b >> 16; - ca = a >> 16; - d = dp; - for (y = y0; y < y0 + height; y++) { - guint bg, fc; - /* Background value */ - bg = ((x & mask) ^ (y & mask)) ? b0 : b1; - fc = (cr - bg) * ca; - d[0] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - fc = (cg - bg) * ca; - d[1] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - fc = (cb - bg) * ca; - d[2] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - d += 3 * width; - } - r += dc[0]; - g += dc[1]; - b += dc[2]; - a += dc[3]; - dp += 3; - } - - return buf; -} - -/* Positions are << 16 */ - -static const guchar * -sp_color_slider_render_map (gint x0, gint y0, gint width, gint height, - guchar *map, gint start, gint step, guint b0, guint b1, guint mask) -{ - static guchar *buf = NULL; - static gint bs = 0; - guchar *dp; - gint x, y; - - if (buf && (bs < width * height)) { - g_free (buf); - buf = NULL; - } - if (!buf) { - buf = g_new (guchar, width * height * 3); - bs = width * height; - } - - dp = buf; - for (x = x0; x < x0 + width; x++) { - gint cr, cg, cb, ca; - guchar *d = dp; - guchar *sp = map + 4 * (start >> 16); - cr = *sp++; - cg = *sp++; - cb = *sp++; - ca = *sp++; - for (y = y0; y < y0 + height; y++) { - guint bg, fc; - /* Background value */ - bg = ((x & mask) ^ (y & mask)) ? b0 : b1; - fc = (cr - bg) * ca; - d[0] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - fc = (cg - bg) * ca; - d[1] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - fc = (cb - bg) * ca; - d[2] = bg + ((fc + (fc >> 8) + 0x80) >> 8); - d += 3 * width; - } - dp += 3; - start += step; - } - - return buf; -} - |