154 lines
2.9 KiB
C
154 lines
2.9 KiB
C
#include "cltr-scratch.h"
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#include "cltr-private.h"
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struct CltrScratch
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{
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CltrWidget widget;
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Pixbuf *pixb;
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CltrTexture *tex;
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};
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static void
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cltr_scratch_show(CltrWidget *widget);
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static gboolean
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cltr_scratch_handle_xevent (CltrWidget *widget, XEvent *xev);
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static void
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cltr_scratch_paint(CltrWidget *widget);
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CltrWidget*
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cltr_scratch_new(int width, int height)
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{
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CltrScratch *scratch;
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ClutterFont *font;
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PixbufPixel pixel = { 255, 255, 255, 100 };
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scratch = g_malloc0(sizeof(CltrScratch));
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scratch->widget.width = width;
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scratch->widget.height = height;
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scratch->widget.show = cltr_scratch_show;
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scratch->widget.paint = cltr_scratch_paint;
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scratch->widget.xevent_handler = cltr_scratch_handle_xevent;
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scratch->pixb = pixbuf_new(width, height);
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pixel_set_vals(&pixel, 0, 0, 0, 255);
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pixbuf_fill_rect(scratch->pixb, 0, 0, width, height, &pixel);
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font = font_new ("Sans Bold 72");
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pixel_set_vals(&pixel, 255, 255, 255, 255);
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font_draw(font, scratch->pixb, "Hello", 0, 0, &pixel);
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scratch->tex = cltr_texture_new(scratch->pixb);
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return CLTR_WIDGET(scratch);
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}
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static void
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cltr_scratch_show(CltrWidget *widget)
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{
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cltr_widget_queue_paint(widget);
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}
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static gboolean
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cltr_scratch_handle_xevent (CltrWidget *widget, XEvent *xev)
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{
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return TRUE;
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}
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static void
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cltr_scratch_paint_old(CltrWidget *widget)
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{
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CltrScratch *scratch = CLTR_SCRATCH(widget);
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int times = 100, num = 0;
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int spost = 0;
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float alphainc = 0.9f / times;
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float alpha = 0.1f;
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glPushMatrix();
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glEnable(GL_TEXTURE_2D);
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_LIGHTING);
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glBlendFunc(GL_SRC_ALPHA,GL_ONE);
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glEnable(GL_BLEND);
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/*
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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*/
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for (num = 0;num < times;num++)
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{
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glColor4f(1.0f, 1.0f, 1.0f, alpha);
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cltr_texture_render_to_gl_quad(scratch->tex,
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widget->x - spost,
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widget->y - spost,
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widget->x + widget->width + spost,
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widget->y + widget->height + spost);
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spost += 2;
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alpha = alpha - alphainc;
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}
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glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
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cltr_texture_render_to_gl_quad(scratch->tex,
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widget->x,
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widget->y,
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widget->x + widget->width ,
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widget->y + widget->height);
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glDisable(GL_BLEND);
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glPopMatrix();
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}
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static void
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cltr_scratch_paint(CltrWidget *widget)
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{
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CltrScratch *scratch = CLTR_SCRATCH(widget);
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glPushMatrix();
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CLTR_MARK();
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glColor4ub(100, 200, 50, 100);
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glRecti(widget->x, widget->y,
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widget->x + widget->width,
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widget->y + widget->height);
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glEnable(GL_TEXTURE_2D);
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cltr_texture_render_to_gl_quad(scratch->tex,
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widget->x,
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widget->y,
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widget->x + widget->width ,
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widget->y + widget->height);
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_BLEND);
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glPopMatrix();
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}
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