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gstreamer/ext/gl/gltestsrc.c
Matthew Waters a2d82e329a gltestsrc: port to gles2/gl3 
This makes gltestsrc work everywhere \o/

- workaround RPi returning invalid values for positive coords in the
  checker shader
- reduce the number of iterations in the mandelbrot shader for gles2

https://bugzilla.gnome.org/show_bug.cgi?id=751540
2016-03-31 20:53:18 +11:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2016> Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gltestsrc.h"
#define MAX_ATTRIBUTES 4
struct vts_color_struct
{
gfloat R, G, B;
};
struct XYZWRGB
{
gfloat X, Y, Z, W, R, G, B;
};
enum
{
COLOR_WHITE = 0,
COLOR_YELLOW,
COLOR_CYAN,
COLOR_GREEN,
COLOR_MAGENTA,
COLOR_RED,
COLOR_BLUE,
COLOR_BLACK,
COLOR_NEG_I,
COLOR_POS_Q,
COLOR_SUPER_BLACK,
COLOR_DARK_GREY
};
static const struct vts_color_struct vts_colors[] = {
/* 100% white */
{1.0f, 1.0f, 1.0f},
/* yellow */
{1.0f, 1.0f, 0.0f},
/* cyan */
{0.0f, 1.0f, 1.0f},
/* green */
{0.0f, 1.0f, 0.0f},
/* magenta */
{1.0f, 0.0f, 1.0f},
/* red */
{1.0f, 0.0f, 0.0f},
/* blue */
{0.0f, 0.0f, 1.0f},
/* black */
{0.0f, 0.0f, 0.0f},
/* -I */
{0.0, 0.0f, 0.5f},
/* +Q */
{0.0f, 0.5, 1.0f},
/* superblack */
{0.0f, 0.0f, 0.0f},
/* 7.421875% grey */
{19. / 256.0f, 19. / 256.0f, 19. / 256.0},
};
/* *INDENT-OFF* */
static const GLfloat positions[] = {
-1.0, 1.0, 0.0, 1.0,
1.0, 1.0, 0.0, 1.0,
1.0, -1.0, 0.0, 1.0,
-1.0, -1.0, 0.0, 1.0,
};
static const GLushort indices_quad[] = { 0, 1, 2, 0, 2, 3 };
/* *INDENT-ON* */
struct attribute
{
const gchar *name;
gint location;
guint n_elements;
GLenum element_type;
guint offset; /* in bytes */
guint stride; /* in bytes */
};
struct SrcShader
{
struct BaseSrcImpl base;
GstGLShader *shader;
guint vao;
guint vbo;
guint vbo_indices;
guint n_attributes;
struct attribute attributes[MAX_ATTRIBUTES];
gconstpointer vertices;
gsize vertices_size;
const gushort *indices;
guint index_offset;
guint n_indices;
};
static void
_bind_buffer (struct SrcShader *src)
{
GstGLContext *context = src->base.context;
const GstGLFuncs *gl = context->gl_vtable;
gint i;
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, src->vbo_indices);
gl->BindBuffer (GL_ARRAY_BUFFER, src->vbo);
/* Load the vertex position */
for (i = 0; i < src->n_attributes; i++) {
struct attribute *attr = &src->attributes[i];
if (attr->location == -1)
attr->location =
gst_gl_shader_get_attribute_location (src->shader, attr->name);
gl->VertexAttribPointer (attr->location, attr->n_elements,
attr->element_type, GL_FALSE, attr->stride,
(void *) (gintptr) attr->offset);
gl->EnableVertexAttribArray (attr->location);
}
}
static void
_unbind_buffer (struct SrcShader *src)
{
GstGLContext *context = src->base.context;
const GstGLFuncs *gl = context->gl_vtable;
gint i;
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
for (i = 0; i < src->n_attributes; i++) {
struct attribute *attr = &src->attributes[i];
gl->DisableVertexAttribArray (attr->location);
}
}
static gboolean
_src_shader_init (gpointer impl, GstGLContext * context, GstVideoInfo * v_info)
{
struct SrcShader *src = impl;
const GstGLFuncs *gl = context->gl_vtable;
src->base.context = context;
if (!src->vbo) {
if (gl->GenVertexArrays) {
gl->GenVertexArrays (1, &src->vao);
gl->BindVertexArray (src->vao);
}
gl->GenBuffers (1, &src->vbo);
gl->BindBuffer (GL_ARRAY_BUFFER, src->vbo);
gl->BufferData (GL_ARRAY_BUFFER, src->vertices_size,
src->vertices, GL_STATIC_DRAW);
gl->GenBuffers (1, &src->vbo_indices);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, src->vbo_indices);
gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, src->n_indices * sizeof (gushort),
src->indices, GL_STATIC_DRAW);
if (gl->GenVertexArrays) {
_bind_buffer (src);
gl->BindVertexArray (0);
}
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
}
return TRUE;
}
static gboolean
_src_shader_fill_bound_fbo (gpointer impl)
{
struct SrcShader *src = impl;
const GstGLFuncs *gl;
g_return_val_if_fail (src->base.context, FALSE);
g_return_val_if_fail (src->shader, FALSE);
gl = src->base.context->gl_vtable;
gst_gl_shader_use (src->shader);
if (gl->GenVertexArrays)
gl->BindVertexArray (src->vao);
else
_bind_buffer (src);
gl->DrawElements (GL_TRIANGLES, src->n_indices, GL_UNSIGNED_SHORT,
(gpointer) (gintptr) src->index_offset);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (src);
gst_gl_context_clear_shader (src->base.context);
return TRUE;
}
static void
_src_shader_deinit (gpointer impl)
{
struct SrcShader *src = impl;
const GstGLFuncs *gl = src->base.context->gl_vtable;
if (src->shader)
gst_object_unref (src->shader);
src->shader = NULL;
if (src->vao)
gl->DeleteVertexArrays (1, &src->vao);
src->vao = 0;
if (src->vbo)
gl->DeleteBuffers (1, &src->vbo);
src->vbo = 0;
if (src->vbo_indices)
gl->DeleteBuffers (1, &src->vbo_indices);
src->vbo_indices = 0;
}
/* *INDENT-OFF* */
static const gchar *smpte_vertex_src =
"attribute vec4 position;\n"
"attribute vec4 a_color;\n"
"varying vec4 color;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
" color = a_color;\n"
"}";
static const gchar *smpte_fragment_src =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"varying vec4 color;\n"
"void main()\n"
"{\n"
" gl_FragColor = color;\n"
"}";
static const gchar *snow_vertex_src =
"attribute vec4 position;\n"
"varying vec2 out_uv;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
" out_uv = position.xy;\n"
"}";
static const gchar *snow_fragment_src =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform float time;\n"
"varying vec2 out_uv;\n"
"\n"
"float rand(vec2 co){\n"
" return fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453);\n"
"}\n"
"void main()\n"
"{\n"
" gl_FragColor = vec4(rand(time * out_uv));\n"
"}";
/* *INDENT-ON* */
#define N_QUADS 21
struct SrcSMPTE
{
struct SrcShader base;
GstGLShader *snow_shader;
GstGLShader *color_shader;
gint attr_snow_position;
};
static gpointer
_src_smpte_new (GstGLTestSrc * test)
{
struct SrcSMPTE *src = g_new0 (struct SrcSMPTE, 1);
src->base.base.src = test;
return src;
}
static gboolean
_src_smpte_init (gpointer impl, GstGLContext * context, GstVideoInfo * v_info)
{
struct SrcSMPTE *src = impl;
struct XYZWRGB *coord;
gushort *plane_indices;
GError *error = NULL;
int color_idx = 0;
int i;
src->base.base.context = context;
coord = g_new0 (struct XYZWRGB, N_QUADS * 4);
plane_indices = g_new0 (gushort, N_QUADS * 6);
/* top row */
for (int i = 0; i < 7; i++) {
coord[color_idx * 4 + 0].X = -1.0f + i * (2.0f / 7.0f);
coord[color_idx * 4 + 0].Y = 1.0f / 3.0f;
coord[color_idx * 4 + 1].X = -1.0f + (i + 1) * (2.0f / 7.0f);
coord[color_idx * 4 + 1].Y = 1.0f / 3.0f;
coord[color_idx * 4 + 2].X = -1.0f + (i + 1) * (2.0f / 7.0f);
coord[color_idx * 4 + 2].Y = -1.0f;
coord[color_idx * 4 + 3].X = -1.0f + i * (2.0f / 7.0f);
coord[color_idx * 4 + 3].Y = -1.0f;
color_idx++;
}
/* middle row */
for (int i = 0; i < 7; i++) {
coord[color_idx * 4 + 0].X = -1.0f + i * (2.0f / 7.0f);
coord[color_idx * 4 + 0].Y = 0.5f;
coord[color_idx * 4 + 1].X = -1.0f + (i + 1) * (2.0f / 7.0f);
coord[color_idx * 4 + 1].Y = 0.5f;
coord[color_idx * 4 + 2].X = -1.0f + (i + 1) * (2.0f / 7.0f);
coord[color_idx * 4 + 2].Y = 1.0f / 3.0f;
coord[color_idx * 4 + 3].X = -1.0f + i * (2.0f / 7.0f);
coord[color_idx * 4 + 3].Y = 1.0f / 3.0f;
color_idx++;
}
/* bottom row, left three */
for (int i = 0; i < 3; i++) {
coord[color_idx * 4 + 0].X = -1.0f + i / 3.0f;
coord[color_idx * 4 + 0].Y = 1.0f;
coord[color_idx * 4 + 1].X = -1.0f + (i + 1) / 3.0f;
coord[color_idx * 4 + 1].Y = 1.0f;
coord[color_idx * 4 + 2].X = -1.0f + (i + 1) / 3.0f;
coord[color_idx * 4 + 2].Y = 0.5f;
coord[color_idx * 4 + 3].X = -1.0f + i / 3.0f;
coord[color_idx * 4 + 3].Y = 0.5f;
color_idx++;
}
/* bottom row, middle three (the blacks) */
for (int i = 0; i < 3; i++) {
coord[color_idx * 4 + 0].X = i / 6.0f;
coord[color_idx * 4 + 0].Y = 1.0f;
coord[color_idx * 4 + 1].X = (i + 1) / 6.0f;
coord[color_idx * 4 + 1].Y = 1.0f;
coord[color_idx * 4 + 2].X = (i + 1) / 6.0f;
coord[color_idx * 4 + 2].Y = 0.5f;
coord[color_idx * 4 + 3].X = i / 6.0f;
coord[color_idx * 4 + 3].Y = 0.5f;
color_idx++;
}
g_assert (color_idx < N_QUADS);
for (i = 0; i < N_QUADS - 1; i++) {
int j, k;
if (i < 7) {
k = i;
} else if ((i - 7) & 1) {
k = COLOR_BLACK;
} else {
k = 13 - i;
}
if (i == 14) {
k = COLOR_NEG_I;
} else if (i == 15) {
k = COLOR_WHITE;
} else if (i == 16) {
k = COLOR_POS_Q;
} else if (i == 17) {
k = COLOR_SUPER_BLACK;
} else if (i == 18) {
k = COLOR_BLACK;
} else if (i == 19) {
k = COLOR_DARK_GREY;
}
for (j = 0; j < 4; j++) {
coord[i * 4 + j].Z = 0.0f;
coord[i * 4 + j].W = 1.0f;
coord[i * 4 + j].R = vts_colors[k].R;
coord[i * 4 + j].G = vts_colors[k].G;
coord[i * 4 + j].B = vts_colors[k].B;
}
for (j = 0; j < 6; j++)
plane_indices[i * 6 + j] = i * 4 + indices_quad[j];
}
/* snow */
coord[color_idx * 4 + 0].X = 0.5f;
coord[color_idx * 4 + 0].Y = 1.0f;
coord[color_idx * 4 + 0].Z = 0.0f;
coord[color_idx * 4 + 0].W = 1.0f;
coord[color_idx * 4 + 1].X = 1.0f;
coord[color_idx * 4 + 1].Y = 1.0f;
coord[color_idx * 4 + 1].Z = 0.0f;
coord[color_idx * 4 + 1].W = 1.0f;
coord[color_idx * 4 + 2].X = 1.0f;
coord[color_idx * 4 + 2].Y = 0.5f;
coord[color_idx * 4 + 2].Z = 0.0f;
coord[color_idx * 4 + 2].W = 1.0f;
coord[color_idx * 4 + 3].X = 0.5f;
coord[color_idx * 4 + 3].Y = 0.5f;
coord[color_idx * 4 + 3].Z = 0.0f;
coord[color_idx * 4 + 3].W = 1.0f;
for (i = 0; i < 6; i++)
plane_indices[color_idx * 6 + i] = color_idx * 4 + indices_quad[i];
color_idx++;
if (src->color_shader)
gst_object_unref (src->color_shader);
src->color_shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
smpte_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
smpte_fragment_src), NULL);
if (!src->color_shader) {
GST_ERROR_OBJECT (src->base.base.src, "%s", error->message);
return FALSE;
}
if (src->snow_shader)
gst_object_unref (src->snow_shader);
src->snow_shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
snow_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
snow_fragment_src), NULL);
if (!src->snow_shader) {
GST_ERROR_OBJECT (src->base.base.src, "%s", error->message);
return FALSE;
}
src->attr_snow_position = -1;
src->base.n_attributes = 2;
src->base.attributes[0].name = "position";
src->base.attributes[0].location = -1;
src->base.attributes[0].n_elements = 4;
src->base.attributes[0].element_type = GL_FLOAT;
src->base.attributes[0].offset = 0;
src->base.attributes[0].stride = sizeof (struct XYZWRGB);
src->base.attributes[1].name = "a_color";
src->base.attributes[1].location = -1;
src->base.attributes[1].n_elements = 3;
src->base.attributes[1].element_type = GL_FLOAT;
src->base.attributes[1].offset = 4 * sizeof (gfloat);
src->base.attributes[1].stride = sizeof (struct XYZWRGB);
src->base.shader = src->color_shader;
src->base.vertices = (gfloat *) coord;
src->base.vertices_size = sizeof (struct XYZWRGB) * N_QUADS * 4;
src->base.indices = plane_indices;
src->base.n_indices = N_QUADS * 6;
return _src_shader_init (impl, context, v_info);
}
static gboolean
_src_smpte_fill_bound_fbo (gpointer impl)
{
struct SrcSMPTE *src = impl;
gint attr_color_position = -1;
src->base.n_attributes = 2;
src->base.shader = src->color_shader;
src->base.n_indices = (N_QUADS - 1) * 6;
src->base.index_offset = 0;
if (!_src_shader_fill_bound_fbo (impl))
return FALSE;
attr_color_position = src->base.attributes[0].location;
src->base.attributes[0].location = src->attr_snow_position;
src->base.n_attributes = 1;
src->base.shader = src->snow_shader;
src->base.n_indices = 6;
src->base.index_offset = (N_QUADS - 1) * 6 * sizeof (gushort);
gst_gl_shader_use (src->snow_shader);
gst_gl_shader_set_uniform_1f (src->snow_shader, "time",
(gfloat) src->base.base.src->running_time / GST_SECOND);
if (!_src_shader_fill_bound_fbo (impl))
return FALSE;
src->attr_snow_position = src->base.attributes[0].location;
src->base.attributes[0].location = attr_color_position;
return TRUE;
}
static void
_src_smpte_free (gpointer impl)
{
struct SrcSMPTE *src = impl;
if (!impl)
return;
_src_shader_deinit (impl);
g_free ((gpointer) src->base.vertices);
g_free ((gpointer) src->base.indices);
g_free (impl);
}
static const struct SrcFuncs src_smpte = {
GST_GL_TEST_SRC_SMPTE,
_src_smpte_new,
_src_smpte_init,
_src_smpte_fill_bound_fbo,
_src_smpte_free,
};
#undef N_QUADS
struct SrcUniColor
{
struct BaseSrcImpl base;
struct vts_color_struct color;
};
static gpointer
_src_uni_color_new (GstGLTestSrc * test)
{
struct SrcUniColor *src = g_new0 (struct SrcUniColor, 1);
src->base.src = test;
return src;
}
static gboolean
_src_uni_color_init (gpointer impl, GstGLContext * context,
GstVideoInfo * v_info)
{
struct SrcUniColor *src = impl;
src->base.context = context;
src->base.v_info = *v_info;
return TRUE;
}
static gboolean
_src_uni_color_fill_bound_fbo (gpointer impl)
{
struct SrcUniColor *src = impl;
const GstGLFuncs *gl = src->base.context->gl_vtable;
gl->ClearColor (src->color.R, src->color.G, src->color.B, 1.0f);
gl->Clear (GL_COLOR_BUFFER_BIT);
return TRUE;
}
static void
_src_uni_color_free (gpointer impl)
{
g_free (impl);
}
#define SRC_UNICOLOR(name, cap_name) \
static gpointer \
G_PASTE(G_PASTE(_src_unicolor_,name),_new) (GstGLTestSrc * test) \
{ \
struct SrcUniColor *src = _src_uni_color_new (test); \
src->color = vts_colors[G_PASTE(COLOR_,cap_name)]; \
return src; \
} \
static const struct SrcFuncs G_PASTE (src_,name) = { \
G_PASTE(GST_GL_TEST_SRC_,cap_name), \
G_PASTE(G_PASTE(_src_unicolor_,name),_new), \
_src_uni_color_init, \
_src_uni_color_fill_bound_fbo, \
_src_uni_color_free, \
}
SRC_UNICOLOR (white, WHITE);
SRC_UNICOLOR (black, BLACK);
SRC_UNICOLOR (red, RED);
SRC_UNICOLOR (green, GREEN);
SRC_UNICOLOR (blue, BLUE);
static gpointer
_src_blink_new (GstGLTestSrc * test)
{
struct SrcUniColor *src = _src_uni_color_new (test);
src->color = vts_colors[COLOR_WHITE];
return src;
}
static gboolean
_src_blink_fill_bound_fbo (gpointer impl)
{
struct SrcUniColor *src = impl;
if (src->color.R > 0.5) {
src->color = vts_colors[COLOR_BLACK];
} else {
src->color = vts_colors[COLOR_WHITE];
}
return _src_uni_color_fill_bound_fbo (impl);
}
static const struct SrcFuncs src_blink = {
GST_GL_TEST_SRC_BLINK,
_src_blink_new,
_src_uni_color_init,
_src_blink_fill_bound_fbo,
_src_uni_color_free,
};
/* *INDENT-OFF* */
static const gchar *checkers_vertex_src = "attribute vec4 position;\n"
"varying vec2 uv;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
/* RPi gives incorrect results for positive uv (plus it makes us start on
* the right pixel color i.e. red) */
" uv = position.xy - 1.0;\n"
"}";
static const gchar *checkers_fragment_src =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform float checker_width;\n"
"uniform float width;\n"
"uniform float height;\n"
"varying vec2 uv;\n"
"void main()\n"
"{\n"
" vec2 xy_mod = floor (0.5 * uv * vec2(width, height) / (checker_width));\n"
" float result = mod (xy_mod.x + xy_mod.y, 2.0);\n"
" gl_FragColor.r = step (result, 0.5);\n"
" gl_FragColor.g = 1.0 - gl_FragColor.r;\n"
" gl_FragColor.ba = vec2(0.0, 1.0);\n"
"}";
/* *INDENT-ON* */
struct SrcCheckers
{
struct SrcShader base;
guint checker_width;
};
static gboolean
_src_checkers_init (gpointer impl, GstGLContext * context,
GstVideoInfo * v_info)
{
struct SrcCheckers *src = impl;
GError *error = NULL;
src->base.base.context = context;
if (src->base.shader)
gst_object_unref (src->base.shader);
src->base.shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
checkers_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
checkers_fragment_src), NULL);
if (!src->base.shader) {
GST_ERROR_OBJECT (src->base.base.src, "%s", error->message);
return FALSE;
}
src->base.n_attributes = 1;
src->base.attributes[0].name = "position";
src->base.attributes[0].location = -1;
src->base.attributes[0].n_elements = 4;
src->base.attributes[0].element_type = GL_FLOAT;
src->base.attributes[0].offset = 0;
src->base.attributes[0].stride = 4 * sizeof (gfloat);
src->base.vertices = positions;
src->base.vertices_size = sizeof (positions);
src->base.indices = indices_quad;
src->base.n_indices = 6;
gst_gl_shader_use (src->base.shader);
gst_gl_shader_set_uniform_1f (src->base.shader, "checker_width",
src->checker_width);
gst_gl_shader_set_uniform_1f (src->base.shader, "width",
(gfloat) GST_VIDEO_INFO_WIDTH (v_info));
gst_gl_shader_set_uniform_1f (src->base.shader, "height",
(gfloat) GST_VIDEO_INFO_HEIGHT (v_info));
gst_gl_context_clear_shader (src->base.base.context);
return _src_shader_init (impl, context, v_info);
}
static void
_src_checkers_free (gpointer impl)
{
struct SrcCheckers *src = impl;
if (!src)
return;
_src_shader_deinit (impl);
g_free (impl);
}
static gpointer
_src_checkers_new (GstGLTestSrc * test)
{
struct SrcCheckers *src = g_new0 (struct SrcCheckers, 1);
src->base.base.src = test;
return src;
}
#define SRC_CHECKERS(spacing) \
static gpointer \
G_PASTE(G_PASTE(_src_checkers,spacing),_new) (GstGLTestSrc * test) \
{ \
struct SrcCheckers *src = _src_checkers_new (test); \
src->checker_width = spacing; \
return src; \
} \
static const struct SrcFuncs G_PASTE(src_checkers,spacing) = { \
G_PASTE(GST_GL_TEST_SRC_CHECKERS,spacing), \
G_PASTE(G_PASTE(_src_checkers,spacing),_new), \
_src_checkers_init, \
_src_shader_fill_bound_fbo, \
_src_checkers_free, \
}
SRC_CHECKERS (1);
SRC_CHECKERS (2);
SRC_CHECKERS (4);
SRC_CHECKERS (8);
static gboolean
_src_snow_init (gpointer impl, GstGLContext * context, GstVideoInfo * v_info)
{
struct SrcShader *src = impl;
GError *error = NULL;
src->base.context = context;
if (src->shader)
gst_object_unref (src->shader);
src->shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
snow_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
snow_fragment_src), NULL);
if (!src->shader) {
GST_ERROR_OBJECT (src->base.src, "%s", error->message);
return FALSE;
}
src->n_attributes = 1;
src->attributes[0].name = "position";
src->attributes[0].location = -1;
src->attributes[0].n_elements = 4;
src->attributes[0].element_type = GL_FLOAT;
src->attributes[0].offset = 0;
src->attributes[0].stride = 4 * sizeof (gfloat);
src->vertices = positions;
src->vertices_size = sizeof (positions);
src->indices = indices_quad;
src->n_indices = 6;
return _src_shader_init (impl, context, v_info);
}
static gboolean
_src_snow_fill_bound_fbo (gpointer impl)
{
struct SrcShader *src = impl;
g_return_val_if_fail (src->base.context, FALSE);
g_return_val_if_fail (src->shader, FALSE);
gst_gl_shader_use (src->shader);
gst_gl_shader_set_uniform_1f (src->shader, "time",
(gfloat) src->base.src->running_time / GST_SECOND);
return _src_shader_fill_bound_fbo (impl);
}
static void
_src_snow_free (gpointer impl)
{
struct SrcShader *src = impl;
if (!src)
return;
_src_shader_deinit (impl);
g_free (impl);
}
static gpointer
_src_snow_new (GstGLTestSrc * test)
{
struct SrcShader *src = g_new0 (struct SrcShader, 1);
src->base.src = test;
return src;
}
static const struct SrcFuncs src_snow = {
GST_GL_TEST_SRC_SNOW,
_src_snow_new,
_src_snow_init,
_src_snow_fill_bound_fbo,
_src_snow_free,
};
/* *INDENT-OFF* */
static const gchar *mandelbrot_vertex_src = "attribute vec4 position;\n"
"uniform float aspect_ratio;\n"
"varying vec2 fractal_position;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
" fractal_position = vec2(position.y * 0.5 - 0.3, aspect_ratio * position.x * 0.5);\n"
" fractal_position *= 2.5;\n"
"}";
static const gchar *mandelbrot_fragment_src =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform float time;\n"
"varying vec2 fractal_position;\n"
"const vec4 K = vec4(1.0, 0.66, 0.33, 3.0);\n"
"vec4 hsv_to_rgb(float hue, float saturation, float value) {\n"
" vec4 p = abs(fract(vec4(hue) + K) * 6.0 - K.wwww);\n"
" return value * mix(K.xxxx, clamp(p - K.xxxx, 0.0, 1.0), saturation);\n"
"}\n"
"vec4 i_to_rgb(int i) {\n"
" float hue = float(i) / 100.0 + sin(time);\n"
" return hsv_to_rgb(hue, 0.5, 0.8);\n"
"}\n"
"vec2 pow_2_complex(vec2 c) {\n"
" return vec2(c.x*c.x - c.y*c.y, 2.0 * c.x * c.y);\n"
"}\n"
"vec2 mandelbrot(vec2 c, vec2 c0) {\n"
" return pow_2_complex(c) + c0;\n"
"}\n"
"vec4 iterate_pixel(vec2 position) {\n"
" vec2 c = vec2(0);\n"
" for (int i=0; i < 20; i++) {\n"
" if (c.x*c.x + c.y*c.y > 2.0*2.0)\n"
" return i_to_rgb(i);\n"
" c = mandelbrot(c, position);\n"
" }\n"
" return vec4(0, 0, 0, 1);\n"
"}\n"
"void main() {\n"
" gl_FragColor = iterate_pixel(fractal_position);\n"
"}";
/* *INDENT-ON* */
static gboolean
_src_mandelbrot_init (gpointer impl, GstGLContext * context,
GstVideoInfo * v_info)
{
struct SrcShader *src = impl;
GError *error = NULL;
src->base.context = context;
if (src->shader)
gst_object_unref (src->shader);
src->shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
mandelbrot_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
mandelbrot_fragment_src), NULL);
if (!src->shader) {
GST_ERROR_OBJECT (src->base.src, "%s", error->message);
return FALSE;
}
src->n_attributes = 1;
src->attributes[0].name = "position";
src->attributes[0].location = -1;
src->attributes[0].n_elements = 4;
src->attributes[0].element_type = GL_FLOAT;
src->attributes[0].offset = 0;
src->attributes[0].stride = 4 * sizeof (gfloat);
src->vertices = positions;
src->vertices_size = sizeof (positions);
src->indices = indices_quad;
src->n_indices = 6;
gst_gl_shader_use (src->shader);
gst_gl_shader_set_uniform_1f (src->shader, "aspect_ratio",
(gfloat) GST_VIDEO_INFO_WIDTH (v_info) /
(gfloat) GST_VIDEO_INFO_HEIGHT (v_info));
gst_gl_context_clear_shader (src->base.context);
return _src_shader_init (impl, context, v_info);
}
static gboolean
_src_mandelbrot_fill_bound_fbo (gpointer impl)
{
struct SrcShader *src = impl;
g_return_val_if_fail (src->base.context, FALSE);
g_return_val_if_fail (src->shader, FALSE);
gst_gl_shader_use (src->shader);
gst_gl_shader_set_uniform_1f (src->shader, "time",
(gfloat) src->base.src->running_time / GST_SECOND);
return _src_shader_fill_bound_fbo (impl);
}
static void
_src_mandelbrot_free (gpointer impl)
{
struct SrcShader *src = impl;
if (!src)
return;
_src_shader_deinit (impl);
g_free (impl);
}
static gpointer
_src_mandelbrot_new (GstGLTestSrc * test)
{
struct SrcShader *src = g_new0 (struct SrcShader, 1);
src->base.src = test;
return src;
}
static const struct SrcFuncs src_mandelbrot = {
GST_GL_TEST_SRC_MANDELBROT,
_src_mandelbrot_new,
_src_mandelbrot_init,
_src_mandelbrot_fill_bound_fbo,
_src_mandelbrot_free,
};
/* *INDENT-OFF* */
static const gchar *circular_vertex_src =
"attribute vec4 position;\n"
"varying vec2 uv;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
" uv = position.xy;\n"
"}";
static const gchar *circular_fragment_src =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform float aspect_ratio;\n"
"varying vec2 uv;\n"
"#define PI 3.14159265\n"
"void main() {\n"
" float dist = 0.5 * sqrt(uv.x * uv.x + uv.y / aspect_ratio * uv.y / aspect_ratio);\n"
" float seg = floor(dist * 16.0);\n"
" if (seg <= 0.0 || seg >= 8.0) {\n"
" gl_FragColor = vec4(vec3(0.0), 1.0);\n"
" } else {\n"
" float d = floor (256.0 * dist * 200.0 * pow (2.0, - (seg - 1.0) / 4.0) + 0.5) / 128.0;\n"
" gl_FragColor = vec4 (vec3(sin (d * PI) * 0.5 + 0.5), 1.0);\n"
" }\n"
"}";
/* *INDENT-ON* */
static gboolean
_src_circular_init (gpointer impl, GstGLContext * context,
GstVideoInfo * v_info)
{
struct SrcShader *src = impl;
GError *error = NULL;
src->base.context = context;
if (src->shader)
gst_object_unref (src->shader);
src->shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
circular_vertex_src),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
circular_fragment_src), NULL);
if (!src->shader) {
GST_ERROR_OBJECT (src->base.src, "%s", error->message);
return FALSE;
}
src->n_attributes = 1;
src->attributes[0].name = "position";
src->attributes[0].location = -1;
src->attributes[0].n_elements = 4;
src->attributes[0].element_type = GL_FLOAT;
src->attributes[0].offset = 0;
src->attributes[0].stride = 4 * sizeof (gfloat);
src->vertices = positions;
src->vertices_size = sizeof (positions);
src->indices = indices_quad;
src->n_indices = 6;
gst_gl_shader_use (src->shader);
gst_gl_shader_set_uniform_1f (src->shader, "aspect_ratio",
(gfloat) GST_VIDEO_INFO_WIDTH (v_info) /
(gfloat) GST_VIDEO_INFO_HEIGHT (v_info));
gst_gl_context_clear_shader (src->base.context);
return _src_shader_init (impl, context, v_info);
}
static void
_src_circular_free (gpointer impl)
{
struct SrcShader *src = impl;
if (!src)
return;
_src_shader_deinit (impl);
g_free (impl);
}
static gpointer
_src_circular_new (GstGLTestSrc * test)
{
struct SrcShader *src = g_new0 (struct SrcShader, 1);
src->base.src = test;
return src;
}
static const struct SrcFuncs src_circular = {
GST_GL_TEST_SRC_CIRCULAR,
_src_circular_new,
_src_circular_init,
_src_mandelbrot_fill_bound_fbo,
_src_circular_free,
};
static const struct SrcFuncs *src_impls[] = {
&src_smpte,
&src_snow,
&src_black,
&src_white,
&src_red,
&src_green,
&src_blue,
&src_checkers1,
&src_checkers2,
&src_checkers4,
&src_checkers8,
&src_circular,
&src_blink,
&src_mandelbrot,
};
const struct SrcFuncs *
gst_gl_test_src_get_src_funcs_for_pattern (GstGLTestSrcPattern pattern)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (src_impls); i++) {
if (src_impls[i]->pattern == pattern)
return src_impls[i];
}
return NULL;
}
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