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[408/906] gleffects: start to make it compatible with OpenGL ES 2.0

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For now only identity, mirror and squeeze effects are available.
Maybe some factorization is needed about compilation shader
before to put the other effects since only a copy/past is needed,
at least until effect number 9: heat.
The effects from 10:sepia to 15:glow require more work.
This commit is contained in:
Julien Isorce 2009-11-21 21:40:14 +01:00 committed by Matthew Waters
parent 9e22a5e0e6
commit e002f92e6d
9 changed files with 200 additions and 17 deletions
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14
gst/gl/Makefile.am
View file

@ -30,17 +30,10 @@ OPENGL_SOURCES = \
gltestsrc.h \
gstgltestsrc.c \
gstgltestsrc.h \
gstgleffects.c \
gstgleffects.h \
gstglmosaic.c \
gstglmosaic.h \
gstgloverlay.h \
effects/gstgleffectssources.c \
effects/gstgleffectssources.h \
effects/gstgleffectscurves.h \
effects/gstgleffectidentity.c \
effects/gstgleffectmirror.c \
effects/gstgleffectsqueeze.c \
effects/gstgleffectstretch.c \
effects/gstgleffecttunnel.c \
effects/gstgleffectfisheye.c \
@ -65,6 +58,13 @@ libgstopengl_la_SOURCES = \
gstgldownload.h \
gstglfiltercube.c \
gstglfiltercube.h \
gstgleffects.c \
gstgleffects.h \
effects/gstgleffectssources.c \
effects/gstgleffectssources.h \
effects/gstgleffectidentity.c \
effects/gstgleffectmirror.c \
effects/gstgleffectsqueeze.c \
$(OPENGL_SOURCES)
# check order of CFLAGS and LIBS, shouldn't the order be the other way around

37
gst/gl/effects/gstgleffectidentity.c
View file

@ -26,8 +26,45 @@ gst_gl_effects_identity_callback (gint width, gint height, guint texture,
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
#ifndef OPENGL_ES2
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#else
GstGLShader *shader = g_hash_table_lookup (effects->shaderstable, "identity0");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "identity0", shader);
if (shader) {
GError *error = NULL;
gst_gl_shader_set_vertex_source (shader, vertex_shader_source);
gst_gl_shader_set_fragment_source (shader, identity_fragment_source);
gst_gl_shader_compile (shader, &error);
if (error) {
GST_ERROR ("%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
} else {
effects->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (shader, "a_position");
effects->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (shader, "a_texCoord");
}
}
}
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#endif
gst_gl_effects_draw_texture (effects, texture);
}

25
gst/gl/effects/gstgleffectmirror.c
View file

@ -33,13 +33,36 @@ gst_gl_effects_mirror_callback (gint width, gint height, guint texture,
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "mirror0", shader);
#ifdef OPENGL_ES2
if (shader) {
GError *error = NULL;
gst_gl_shader_set_vertex_source (shader, vertex_shader_source);
gst_gl_shader_set_fragment_source (shader, mirror_fragment_source);
gst_gl_shader_compile (shader, &error);
if (error) {
GST_ERROR ("%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
} else {
effects->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (shader, "a_position");
effects->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (shader, "a_texCoord");
}
}
#endif
}
#ifndef OPENGL_ES2
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
mirror_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#endif
gst_gl_shader_use (shader);
@ -49,8 +72,10 @@ gst_gl_effects_mirror_callback (gint width, gint height, guint texture,
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#ifndef OPENGL_ES2
gst_gl_shader_set_uniform_1f (shader, "width", (gfloat) width / 2.0f);
gst_gl_shader_set_uniform_1f (shader, "height", (gfloat) height / 2.0f);
#endif
gst_gl_effects_draw_texture (effects, texture);
}

25
gst/gl/effects/gstgleffectsqueeze.c
View file

@ -33,13 +33,36 @@ gst_gl_effects_squeeze_callback (gint width, gint height, guint texture,
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "squeeze0", shader);
#ifdef OPENGL_ES2
if (shader) {
GError *error = NULL;
gst_gl_shader_set_vertex_source (shader, vertex_shader_source);
gst_gl_shader_set_fragment_source (shader, squeeze_fragment_source);
gst_gl_shader_compile (shader, &error);
if (error) {
GST_ERROR ("%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
} else {
effects->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (shader, "a_position");
effects->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (shader, "a_texCoord");
}
}
#endif
}
#ifndef OPENGL_ES2
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
squeeze_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#endif
gst_gl_shader_use (shader);
@ -49,8 +72,10 @@ gst_gl_effects_squeeze_callback (gint width, gint height, guint texture,
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#ifndef OPENGL_ES2
gst_gl_shader_set_uniform_1f (shader, "width", (gfloat) width / 2.0f);
gst_gl_shader_set_uniform_1f (shader, "height", (gfloat) height / 2.0f);
#endif
gst_gl_effects_draw_texture (effects, texture);
}

58
gst/gl/effects/gstgleffectssources.c
View file

@ -24,29 +24,71 @@
/* A common file for sources is needed since shader sources can be
* generic and reused by several effects */
/* Vertex shader */
const gchar *vertex_shader_source =
"attribute vec4 a_position;"
"attribute vec2 a_texCoord;"
"varying vec2 v_texCoord;"
"void main()"
"{"
" gl_Position = a_position;"
" v_texCoord = a_texCoord;"
"}";
/* Identity effect */
const gchar *identity_fragment_source =
"precision mediump float;"
"varying vec2 v_texCoord;"
"uniform sampler2D tex;"
"void main()"
"{"
" gl_FragColor = texture2D(tex, v_texCoord);"
"}";
/* Mirror effect */
const gchar *mirror_fragment_source =
#ifndef OPENGL_ES2
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect tex;"
"uniform float width, height;"
#else
"precision mediump float;"
"varying vec2 v_texCoord;"
"uniform sampler2D tex;"
#endif
"void main () {"
#ifndef OPENGL_ES2
" vec2 tex_size = vec2 (width, height);"
" vec2 texturecoord = gl_TexCoord[0].xy;"
" vec2 normcoord;"
" normcoord = texturecoord / tex_size - 1.0;"
" normcoord.x *= sign (normcoord.x);"
" texturecoord = (normcoord + 1.0) * tex_size;"
" vec4 color = texture2DRect (tex, texturecoord); "
" gl_FragColor = color * gl_Color;" "}";
" vec4 color = texture2DRect (tex, texturecoord);"
" gl_FragColor = color * gl_Color;"
#else
" vec2 texturecoord = v_texCoord.xy;"
" float normcoord = texturecoord.x - 0.5;"
" normcoord *= sign (normcoord);"
" texturecoord.x = (normcoord + 0.5);"
" gl_FragColor = texture2D (tex, texturecoord);"
#endif
"}";
/* Squeeze effect */
const gchar *squeeze_fragment_source =
#ifndef OPENGL_ES2
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect tex;"
"uniform float width, height;"
#else
"precision mediump float;"
"varying vec2 v_texCoord;"
"uniform sampler2D tex;"
#endif
"void main () {"
#ifndef OPENGL_ES2
" vec2 tex_size = vec2 (width, height);"
" vec2 texturecoord = gl_TexCoord[0].xy;"
" vec2 normcoord;"
@ -56,7 +98,17 @@ const gchar *squeeze_fragment_source =
" normcoord = normcoord / r;"
" texturecoord = (normcoord + 1.0) * tex_size;"
" vec4 color = texture2DRect (tex, texturecoord); "
" gl_FragColor = color * gl_Color;" "}";
" gl_FragColor = color * gl_Color;"
#else
" vec2 texturecoord = v_texCoord.xy;"
" vec2 normcoord = texturecoord - 0.5;"
" float r = length (normcoord);"
" r = pow(r, 0.40)*1.3;"
" normcoord = normcoord / r;"
" texturecoord = (normcoord + 0.5);"
" gl_FragColor = texture2D (tex, texturecoord);"
#endif
"}";
/* Stretch Effect */

2
gst/gl/effects/gstgleffectssources.h
View file

@ -21,6 +21,8 @@
#ifndef __GST_GL_EFFECTS_SOURCES_H__
#define __GST_GL_EFFECTS_SOURCES_H__
extern const gchar *vertex_shader_source;
extern const gchar *identity_fragment_source;
extern const gchar *mirror_fragment_source;
extern const gchar *squeeze_fragment_source;
extern const gchar *stretch_fragment_source;

37
gst/gl/gstgleffects.c
View file

@ -103,6 +103,7 @@ gst_gl_effects_effect_get_type (void)
{GST_GL_EFFECT_IDENTITY, "Do nothing Effect", "identity"},
{GST_GL_EFFECT_MIRROR, "Mirror Effect", "mirror"},
{GST_GL_EFFECT_SQUEEZE, "Squeeze Effect", "squeeze"},
#ifndef OPENGL_ES2
{GST_GL_EFFECT_STRETCH, "Stretch Effect", "stretch"},
{GST_GL_EFFECT_FISHEYE, "FishEye Effect", "fisheye"},
{GST_GL_EFFECT_TWIRL, "Twirl Effect", "twirl"},
@ -116,6 +117,7 @@ gst_gl_effects_effect_get_type (void)
{GST_GL_EFFECT_XRAY, "Glowing negative effect", "xray"},
{GST_GL_EFFECT_SIN, "All Grey but Red Effect", "sin"},
{GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow"},
#endif
{0, NULL, NULL}
};
@ -140,6 +142,7 @@ gst_gl_effects_set_effect (GstGLEffects * effects, gint effect_type)
case GST_GL_EFFECT_SQUEEZE:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_squeeze;
break;
#ifndef OPENGL_ES2
case GST_GL_EFFECT_STRETCH:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_stretch;
break;
@ -179,6 +182,7 @@ gst_gl_effects_set_effect (GstGLEffects * effects, gint effect_type)
case GST_GL_EFFECT_GLOW:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_glow;
break;
#endif
default:
g_assert_not_reached ();
}
@ -271,6 +275,7 @@ gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
#ifndef OPENGL_ES2
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
@ -287,6 +292,36 @@ gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex)
glVertex2f (-1.0, 1.0);
glEnd ();
#else
const GLfloat vVertices[] = { -1.0f, -1.0f, 0.0f,
0.0f, 0.0f,
1.0, -1.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
1.0f, 1.0f,
-1.0f, 1.0f, 0.0f,
0.0f, 1.0f
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
//glClear (GL_COLOR_BUFFER_BIT);
//Load the vertex position
glVertexAttribPointer (effects->draw_attr_position_loc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), vVertices);
//Load the texture coordinate
glVertexAttribPointer (effects->draw_attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]);
glEnableVertexAttribArray (effects->draw_attr_position_loc);
glEnableVertexAttribArray (effects->draw_attr_texture_loc);
glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
#endif
}
static void
@ -301,8 +336,10 @@ set_horizontal_swap (GstGLDisplay * display, gpointer data)
0.0, 0.0, 0.0, 1.0
};
#ifndef OPENGL_ES2
glMatrixMode (GL_MODELVIEW);
glLoadMatrixd (mirrormatrix);
#endif
}
static void

5
gst/gl/gstgleffects.h
View file

@ -70,6 +70,11 @@ struct _GstGLEffects
GHashTable *shaderstable;
gboolean horizontal_swap; /* switch left to right */
#ifdef OPENGL_ES2
GLint draw_attr_position_loc;
GLint draw_attr_texture_loc;
#endif
};
struct _GstGLEffectsClass

14
gst/gl/gstopengl.c
View file

@ -48,8 +48,10 @@
#include "gstglimagesink.h"
#include "gstglfiltercube.h"
#include "gstgleffects.h"
GType gst_gl_filter_cube_get_type (void);
GType gst_gl_effects_get_type (void);
#ifndef OPENGL_ES2
#include "gstgltestsrc.h"
@ -58,11 +60,9 @@ GType gst_gl_filter_cube_get_type (void);
#include "gstglfilterapp.h"
#include "gstglcolorscale.h"
#include "gstgldeinterlace.h"
#include "gstgleffects.h"
#include "gstglbumper.h"
#include "gstglmosaic.h"
GType gst_gl_effects_get_type (void);
GType gst_gl_deinterlace_get_type (void);
GType gst_gl_filter_app_get_type (void);
GType gst_gl_filterblur_get_type (void);
@ -104,6 +104,11 @@ plugin_init (GstPlugin * plugin)
return FALSE;
}
if (!gst_element_register (plugin, "gleffects",
GST_RANK_NONE, gst_gl_effects_get_type ())) {
return FALSE;
}
#ifndef OPENGL_ES2
if (!gst_element_register (plugin, "gltestsrc",
GST_RANK_NONE, GST_TYPE_GL_TEST_SRC)) {
@ -123,11 +128,6 @@ plugin_init (GstPlugin * plugin)
return FALSE;
}
if (!gst_element_register (plugin, "gleffects",
GST_RANK_NONE, gst_gl_effects_get_type ())) {
return FALSE;
}
if (!gst_element_register (plugin, "glfilterblur",
GST_RANK_NONE, gst_gl_filterblur_get_type ())) {
return FALSE;