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[447/906] xray: port to the new separable sobel convolution

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Port xray effect to use the same sobel convolution just used in
glfiltersobel. Now xray too works on i915 (a bit slow).
This commit is contained in:
Filippo Argiolas 2010-04-29 12:59:42 +02:00 committed by Matthew Waters
parent 021a28657d
commit 87fda0d867
2 changed files with 120 additions and 27 deletions
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145
gst/gl/effects/gstgleffectxray.c
View file

@ -108,34 +108,23 @@ gst_gl_effects_xray_step_three (gint width, gint height, guint texture,
gst_gl_effects_draw_texture (effects, texture);
}
/* multipass separable sobel */
static void
gst_gl_effects_xray_step_four (gint width, gint height, guint texture,
gst_gl_effects_xray_desaturate (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
gfloat hkern[9] = {
1.0, 0.0, -1.0,
2.0, 0.0, -2.0,
1.0, 0.0, -1.0
};
gfloat vkern[9] = {
1.0, 2.0, 1.0,
0.0, 0.0, 0.0,
-1.0, -2.0, -1.0
};
shader = g_hash_table_lookup (effects->shaderstable, "xray3");
shader = g_hash_table_lookup (effects->shaderstable, "xray_desat");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray3", shader);
g_hash_table_insert (effects->shaderstable, "xray_desat", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
sobel_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
desaturate_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
@ -148,15 +137,105 @@ gst_gl_effects_xray_step_four (gint width, gint height, guint texture,
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "hkern", 9, hkern);
gst_gl_shader_set_uniform_1fv (shader, "vkern", 9, vkern);
gst_gl_shader_set_uniform_1i (shader, "invert", TRUE);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_hconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_hconv");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_hconv", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
sep_sobel_hconv3_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_vconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_vconv");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_vconv", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
sep_sobel_vconv3_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_length (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_len");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_len", shader);
}
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
sep_sobel_length_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1i (shader, "invert", TRUE);
gst_gl_effects_draw_texture (effects, texture);
}
/* end of sobel passes */
void
gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
gpointer stuff)
@ -191,7 +270,7 @@ gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.28f);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.4f);
gst_gl_shader_set_uniform_1i (shader, "blend", 1);
gst_gl_effects_draw_texture (effects, texture);
@ -212,9 +291,23 @@ gst_gl_effects_xray (GstGLEffects * effects)
gst_gl_filter_render_to_target (filter, effects->midtexture[1],
effects->midtexture[2], gst_gl_effects_xray_step_three, effects);
/* detect edges with Sobel */
gst_gl_filter_render_to_target (filter, effects->midtexture[2],
effects->midtexture[3], gst_gl_effects_xray_step_four, effects);
/* multiply edges with the blurred image */
/* the old version used edges from the blurred texture, this uses
* the ones from original texture, still not sure what I like
* more. This one gives better edges obviously but behaves badly
* with noise */
/* desaturate */
gst_gl_filter_render_to_target (filter, effects->intexture,
effects->midtexture[3], gst_gl_effects_xray_desaturate, effects);
/* horizonal convolution */
gst_gl_filter_render_to_target (filter, effects->midtexture[3],
effects->midtexture[4], gst_gl_effects_xray_sobel_hconv, effects);
/* vertical convolution */
gst_gl_filter_render_to_target (filter, effects->midtexture[4],
effects->midtexture[3], gst_gl_effects_xray_sobel_vconv, effects);
/* gradient length */
gst_gl_filter_render_to_target (filter, effects->midtexture[3],
effects->midtexture[4], gst_gl_effects_xray_sobel_length, effects);
/* multiply edges with the blurred image */
gst_gl_filter_render_to_target (filter, effects->midtexture[4],
effects->outtexture, gst_gl_effects_xray_step_five, effects);
}

2
gst/gl/gstgleffects.h
View file

@ -43,7 +43,7 @@ typedef struct _GstGLEffectsClass GstGLEffectsClass;
typedef void (* GstGLEffectProcessFunc) (GstGLEffects *effects);
#define NEEDED_TEXTURES 4
#define NEEDED_TEXTURES 5
enum {
GST_GL_EFFECTS_CURVE_HEAT,