When ever an output is repainted, a random tint color is generated. All
the repainted regions are tinted with this color.
---
src/compositor.c | 16 ++++++++++++++++
src/compositor.h | 2 ++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/src/compositor.c b/src/compositor.c
index ab90ded..2082c8f 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -737,6 +737,16 @@ texture_region(struct weston_surface *es,
pixman_region32_t *region)
return n;
}
+static void
+randomise_tint(GLfloat *c)
+{
+ GLfloat a = 0.5f;
+ c[0] = ((random() % 1000) / 2000.0f + 0.4f) * a;
+ c[1] = ((random() % 1000) / 2000.0f + 0.4f) * a;
+ c[2] = ((random() % 1000) / 2000.0f + 0.4f) * a;
+ c[3] = a;
+}
+
WL_EXPORT void
weston_surface_draw(struct weston_surface *es, struct weston_output *output)
{
@@ -782,6 +792,7 @@ weston_surface_draw(struct weston_surface *es, struct
weston_output *output)
glUniform1f(es->shader->alpha_uniform, es->alpha / 255.0);
glUniform1f(es->shader->texwidth_uniform,
(GLfloat)es->geometry.width / es->pitch);
+ glUniform4fv(es->shader->tint_uniform, 1, ec->tint_color);
if (es->transform.enabled)
filter = GL_LINEAR;
@@ -972,6 +983,8 @@ weston_output_repaint(struct weston_output *output, int
msecs)
output->border.top + output->border.bottom;
glViewport(0, 0, width, height);
+ randomise_tint(ec->tint_color);
+
pixman_region32_init(&new_damage);
pixman_region32_init(&opaque);
pixman_region32_init(&overlap);
@@ -1830,6 +1843,7 @@ static const char texture_fragment_shader[] =
"uniform sampler2D tex;\n"
"uniform float alpha;\n"
"uniform float texwidth;\n"
+ "uniform vec4 tint;\n"
"void main()\n"
"{\n"
" if (v_texcoord.x < 0.0 || v_texcoord.x > texwidth ||\n"
@@ -1837,6 +1851,7 @@ static const char texture_fragment_shader[] =
" discard;\n"
" gl_FragColor = texture2D(tex, v_texcoord)\n;"
" gl_FragColor = alpha * gl_FragColor;\n"
+ " gl_FragColor.rgb = gl_FragColor.rgb * (1.0 - tint.a) + tint.rgb;\n"
"}\n";
static const char solid_fragment_shader[] =
@@ -1899,6 +1914,7 @@ weston_shader_init(struct weston_shader *shader,
shader->color_uniform = glGetUniformLocation(shader->program, "color");
shader->texwidth_uniform = glGetUniformLocation(shader->program,
"texwidth");
+ shader->tint_uniform = glGetUniformLocation(shader->program, "tint");
return 0;
}
diff --git a/src/compositor.h b/src/compositor.h
index 966d3f4..975eb53 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -109,6 +109,7 @@ struct weston_shader {
GLint alpha_uniform;
GLint color_uniform;
GLint texwidth_uniform;
+ GLint tint_uniform;
};
struct weston_animation {
@@ -183,6 +184,7 @@ struct weston_compositor {
/* Repaint state. */
struct timespec previous_swap;
struct wl_array vertices, indices;
+ GLfloat tint_color[4];
struct weston_surface *overlay;
struct weston_switcher *switcher;
--
1.7.3.4
_______________________________________________
wayland-devel mailing list
wayland-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/wayland-devel
