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[192/906] complete differencematte filter.. I did it quickly, probably still needs some work

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This commit is contained in:
Filippo Argiolas 2008-08-18 21:40:26 +02:00 committed by Matthew Waters
parent 3faa943819
commit 8024aa7483
3 changed files with 168 additions and 34 deletions
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13
gst/gl/effects/gstgleffectssources.c
View file

@ -359,6 +359,19 @@ const gchar *interpolate_fragment_source =
"gl_FragColor = blendcolor + (1.0 - blendcolor.a) * basecolor;"
"}";
const gchar *texture_interp_fragment_source =
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect base;"
"uniform sampler2DRect blend;"
"uniform sampler2DRect alpha;"
"void main () {"
"vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st);"
"vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
"vec4 alphacolor = texture2DRect (alpha, gl_TexCoord[0].st);"
// "gl_FragColor = alphacolor;"
"gl_FragColor = (alphacolor * blendcolor) + (1.0 - alphacolor) * basecolor;"
"}";
const gchar *difference_fragment_source =
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect saved;"

1
gst/gl/effects/gstgleffectssources.h
View file

@ -37,6 +37,7 @@ const gchar *luma_to_curve_fragment_source;
const gchar *rgb_to_curve_fragment_source;
const gchar *sin_fragment_source;
const gchar *interpolate_fragment_source;
const gchar *texture_interp_fragment_source;
const gchar *difference_fragment_source;
#endif /* __GST_GL_EFFECTS_SOURCES_H__ */

188
gst/gl/gstgldifferencematte.c
View file

@ -46,6 +46,7 @@ struct _GstGLDifferenceMatte
GLuint savedbgtexture;
GLuint newbgtexture;
GLuint midtexture[4];
GLuint intexture;
};
struct _GstGLDifferenceMatteClass
@ -96,8 +97,17 @@ gst_gl_differencematte_init_gl_resources (GstGLFilter *filter)
GstGLDifferenceMatte *differencematte = GST_GL_DIFFERENCEMATTE (filter);
gint i;
for (i=0; i<3; i++)
for (i=0; i<4; i++) {
glGenTextures (1, &differencematte->midtexture[i]);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, differencematte->midtexture[i]);
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
filter->width, filter->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
differencematte->shader[i] = gst_gl_shader_new ();
}
g_return_if_fail (
gst_gl_shader_compile_and_check (differencematte->shader[0],
@ -109,12 +119,13 @@ gst_gl_differencematte_init_gl_resources (GstGLFilter *filter)
GST_GL_SHADER_FRAGMENT_SOURCE));
g_return_if_fail (
gst_gl_shader_compile_and_check (differencematte->shader[1],
gst_gl_shader_compile_and_check (differencematte->shader[2],
vconv9_fragment_source,
GST_GL_SHADER_FRAGMENT_SOURCE));
g_return_if_fail (
gst_gl_shader_compile_and_check (differencematte->shader[1],
interpolate_fragment_source,
gst_gl_shader_compile_and_check (differencematte->shader[3],
texture_interp_fragment_source,
GST_GL_SHADER_FRAGMENT_SOURCE));
}
@ -127,8 +138,10 @@ gst_gl_differencematte_reset_gl_resources (GstGLFilter *filter)
glDeleteTextures (1, &differencematte->savedbgtexture);
glDeleteTextures (1, &differencematte->newbgtexture);
for (i=0; i<3; i++)
for (i=0; i<4; i++) {
g_object_unref (differencematte->shader[i]);
glDeleteTextures (1, &differencematte->midtexture[i]);
}
}
static void
@ -258,33 +271,6 @@ gst_gl_differencematte_save_texture (gint width, gint height, guint texture, gpo
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static void
gst_gl_differencematte_callback (gint width, gint height, guint texture, gpointer stuff)
{
GstGLDifferenceMatte* differencematte = GST_GL_DIFFERENCEMATTE (stuff);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (differencematte->shader[0]);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable(GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[0], "current", 0);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, differencematte->savedbgtexture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[0], "saved", 2);
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static void init_pixbuf_texture (GstGLDisplay *display, gpointer data)
{
GstGLDifferenceMatte *differencematte = GST_GL_DIFFERENCEMATTE (data);
@ -310,6 +296,126 @@ static void init_pixbuf_texture (GstGLDisplay *display, gpointer data)
}
}
static void
gst_gl_differencematte_diff (gint width, gint height, guint texture, gpointer stuff)
{
GstGLDifferenceMatte* differencematte = GST_GL_DIFFERENCEMATTE (stuff);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (differencematte->shader[0]);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable(GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[0], "current", 0);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, differencematte->savedbgtexture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[0], "saved", 2);
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static void
gst_gl_differencematte_hblur (gint width, gint height, guint texture, gpointer stuff)
{
GstGLDifferenceMatte* differencematte = GST_GL_DIFFERENCEMATTE (stuff);
gfloat gauss_kernel[9] = {
0.026995, 0.064759, 0.120985,
0.176033, 0.199471, 0.176033,
0.120985, 0.064759, 0.026995
};
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (differencematte->shader[1]);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable(GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[1], "tex", 0);
gst_gl_shader_set_uniform_1fv (differencematte->shader[1], "kernel", 9, gauss_kernel);
gst_gl_shader_set_uniform_1f (differencematte->shader[1], "norm_const", 0.977016f);
gst_gl_shader_set_uniform_1f (differencematte->shader[1], "norm_offset", 0.0f);
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static void
gst_gl_differencematte_vblur (gint width, gint height, guint texture, gpointer stuff)
{
GstGLDifferenceMatte* differencematte = GST_GL_DIFFERENCEMATTE (stuff);
gfloat gauss_kernel[9] = {
0.026995, 0.064759, 0.120985,
0.176033, 0.199471, 0.176033,
0.120985, 0.064759, 0.026995
};
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (differencematte->shader[2]);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable(GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[2], "tex", 0);
gst_gl_shader_set_uniform_1fv (differencematte->shader[2], "kernel", 9, gauss_kernel);
gst_gl_shader_set_uniform_1f (differencematte->shader[2], "norm_const", 0.977016f);
gst_gl_shader_set_uniform_1f (differencematte->shader[2], "norm_offset", 0.0f);
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static void
gst_gl_differencematte_interp (gint width, gint height, guint texture, gpointer stuff)
{
GstGLDifferenceMatte* differencematte = GST_GL_DIFFERENCEMATTE (stuff);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (differencematte->shader[3]);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable(GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[3], "base", 0);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, differencematte->newbgtexture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[3], "blend", 1);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, differencematte->midtexture[2]);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (differencematte->shader[3], "alpha", 2);
gst_gl_differencematte_draw_texture (differencematte, texture);
}
static gboolean
gst_gl_differencematte_filter (GstGLFilter* filter, GstGLBuffer* inbuf,
GstGLBuffer* outbuf)
@ -318,6 +424,8 @@ gst_gl_differencematte_filter (GstGLFilter* filter, GstGLBuffer* inbuf,
GdkPixbuf *pixbuf;
GError *error = NULL;
differencematte->intexture = inbuf->texture;
if (differencematte->bg_has_changed && (differencematte->location != NULL)) {
pixbuf = gdk_pixbuf_new_from_file (differencematte->location, &error);
if (pixbuf) {
@ -343,8 +451,20 @@ gst_gl_differencematte_filter (GstGLFilter* filter, GstGLBuffer* inbuf,
differencematte->bg_has_changed = FALSE;
}
gst_gl_filter_render_to_target (filter, inbuf->texture, outbuf->texture,
gst_gl_differencematte_callback, differencematte);
gst_gl_filter_render_to_target (filter, inbuf->texture, differencematte->midtexture[0],
gst_gl_differencematte_diff, differencematte);
gst_gl_filter_render_to_target (filter,
differencematte->midtexture[0],
differencematte->midtexture[1],
gst_gl_differencematte_hblur, differencematte);
gst_gl_filter_render_to_target (filter,
differencematte->midtexture[1],
differencematte->midtexture[2],
gst_gl_differencematte_vblur, differencematte);
gst_gl_filter_render_to_target (filter,
inbuf->texture,
outbuf->texture,
gst_gl_differencematte_interp, differencematte);
return TRUE;
}