527 lines
15 KiB
C
527 lines
15 KiB
C
|
#include <math.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <epoxy/gl.h>
|
||
|
|
|
||
|
|
#include "gtkshadertoy.h"
|
||
|
|
|
||
|
|
const char *default_image_shader =
|
||
|
|
"void mainImage(out vec4 fragColor, in vec2 fragCoord) {\n"
|
||
|
|
" // Normalized pixel coordinates (from 0 to 1)\n"
|
||
|
|
" vec2 uv = fragCoord/iResolution.xy;\n"
|
||
|
|
"\n"
|
||
|
|
" // Time varying pixel color\n"
|
||
|
|
" vec3 col = 0.5 + 0.5*cos(iTime+uv.xyx+vec3(0,2,4));\n"
|
||
|
|
"\n"
|
||
|
|
" if (distance(iMouse.xy, fragCoord.xy) <= 10.0) {\n"
|
||
|
|
" col = vec3(0.0);\n"
|
||
|
|
" }\n"
|
||
|
|
"\n"
|
||
|
|
" // Output to screen\n"
|
||
|
|
" fragColor = vec4(col,1.0);\n"
|
||
|
|
"}\n";
|
||
|
|
|
||
|
|
const char *shadertoy_vertex_shader =
|
||
|
|
"#version 150 core\n"
|
||
|
|
"\n"
|
||
|
|
"uniform vec3 iResolution;\n"
|
||
|
|
"\n"
|
||
|
|
"in vec2 position;\n"
|
||
|
|
"out vec2 fragCoord;\n"
|
||
|
|
"\n"
|
||
|
|
"void main() {\n"
|
||
|
|
" gl_Position = vec4(position, 0.0, 1.0);\n"
|
||
|
|
"\n"
|
||
|
|
" // Convert from OpenGL coordinate system (with origin in center\n"
|
||
|
|
" // of screen) to Shadertoy/texture coordinate system (with origin\n"
|
||
|
|
" // in lower left corner)\n"
|
||
|
|
" fragCoord = (gl_Position.xy + vec2(1.0)) / vec2(2.0) * iResolution.xy;\n"
|
||
|
|
"}\n";
|
||
|
|
|
||
|
|
const char *fragment_prefix =
|
||
|
|
"#version 150 core\n"
|
||
|
|
"\n"
|
||
|
|
"uniform vec3 iResolution; // viewport resolution (in pixels)\n"
|
||
|
|
"uniform float iTime; // shader playback time (in seconds)\n"
|
||
|
|
"uniform float iTimeDelta; // render time (in seconds)\n"
|
||
|
|
"uniform int iFrame; // shader playback frame\n"
|
||
|
|
"uniform float iChannelTime[4]; // channel playback time (in seconds)\n"
|
||
|
|
"uniform vec3 iChannelResolution[4]; // channel resolution (in pixels)\n"
|
||
|
|
"uniform vec4 iMouse; // mouse pixel coords. xy: current (if MLB down), zw: click\n"
|
||
|
|
"uniform sampler2D iChannel0;\n"
|
||
|
|
"uniform sampler2D iChannel1;\n"
|
||
|
|
"uniform sampler2D iChannel2;\n"
|
||
|
|
"uniform sampler2D iChannel3;\n"
|
||
|
|
"uniform vec4 iDate; // (year, month, day, time in seconds)\n"
|
||
|
|
"uniform float iSampleRate; // sound sample rate (i.e., 44100)\n"
|
||
|
|
"\n"
|
||
|
|
"in vec2 fragCoord;\n"
|
||
|
|
"out vec4 vFragColor;\n";
|
||
|
|
|
||
|
|
|
||
|
|
// Fragment shader suffix
|
||
|
|
const char *fragment_suffix =
|
||
|
|
" void main() {\n"
|
||
|
|
" vec4 c;\n"
|
||
|
|
" mainImage(c, fragCoord);\n"
|
||
|
|
" vFragColor = c;\n"
|
||
|
|
" }\n";
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
char *image_shader;
|
||
|
|
gboolean image_shader_dirty;
|
||
|
|
|
||
|
|
gboolean error_set;
|
||
|
|
|
||
|
|
/* Vertex buffers */
|
||
|
|
GLuint vao;
|
||
|
|
GLuint buffer;
|
||
|
|
|
||
|
|
/* Active program */
|
||
|
|
GLuint program;
|
||
|
|
|
||
|
|
/* Location of uniforms for program */
|
||
|
|
GLuint resolution_location;
|
||
|
|
GLuint time_location;
|
||
|
|
GLuint timedelta_location;
|
||
|
|
GLuint frame_location;
|
||
|
|
GLuint mouse_location;
|
||
|
|
|
||
|
|
/* Current uniform values */
|
||
|
|
float resolution[3];
|
||
|
|
float time;
|
||
|
|
float timedelta;
|
||
|
|
float mouse[4];
|
||
|
|
int frame;
|
||
|
|
|
||
|
|
/* Animation data */
|
||
|
|
gint64 first_frame_time;
|
||
|
|
gint64 first_frame;
|
||
|
|
guint tick;
|
||
|
|
} GtkShadertoyPrivate;
|
||
|
|
|
||
|
|
G_DEFINE_TYPE_WITH_PRIVATE (GtkShadertoy, gtk_shadertoy, GTK_TYPE_GL_AREA)
|
||
|
|
|
||
|
|
static gboolean gtk_shadertoy_render (GtkGLArea *area,
|
||
|
|
GdkGLContext *context);
|
||
|
|
static void gtk_shadertoy_reshape (GtkGLArea *area,
|
||
|
|
int width,
|
||
|
|
int height);
|
||
|
|
static void gtk_shadertoy_realize (GtkWidget *widget);
|
||
|
|
static void gtk_shadertoy_unrealize (GtkWidget *widget);
|
||
|
|
static gboolean gtk_shadertoy_tick (GtkWidget *widget,
|
||
|
|
GdkFrameClock *frame_clock,
|
||
|
|
gpointer user_data);
|
||
|
|
|
||
|
|
GtkWidget *
|
||
|
|
gtk_shadertoy_new (void)
|
||
|
|
{
|
||
|
|
return g_object_new (gtk_shadertoy_get_type (), NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
drag_begin_cb (GtkGestureDrag *drag,
|
||
|
|
double x,
|
||
|
|
double y,
|
||
|
|
gpointer user_data)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (user_data);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
int height = gtk_widget_get_height (GTK_WIDGET (shadertoy));
|
||
|
|
int scale = gtk_widget_get_scale_factor (GTK_WIDGET (shadertoy));
|
||
|
|
|
||
|
|
priv->mouse[0] = x * scale;
|
||
|
|
priv->mouse[1] = (height - y) * scale;
|
||
|
|
priv->mouse[2] = priv->mouse[0];
|
||
|
|
priv->mouse[3] = priv->mouse[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
drag_update_cb (GtkGestureDrag *drag,
|
||
|
|
double dx,
|
||
|
|
double dy,
|
||
|
|
gpointer user_data)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (user_data);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
int width = gtk_widget_get_width (GTK_WIDGET (shadertoy));
|
||
|
|
int height = gtk_widget_get_height (GTK_WIDGET (shadertoy));
|
||
|
|
int scale = gtk_widget_get_scale_factor (GTK_WIDGET (shadertoy));
|
||
|
|
double x, y;
|
||
|
|
|
||
|
|
gtk_gesture_drag_get_start_point (drag, &x, &y);
|
||
|
|
x += dx;
|
||
|
|
y += dy;
|
||
|
|
|
||
|
|
if (x >= 0 && x < width &&
|
||
|
|
y >= 0 && y < height)
|
||
|
|
{
|
||
|
|
priv->mouse[0] = x * scale;
|
||
|
|
priv->mouse[1] = (height - y) * scale;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
drag_end_cb (GtkGestureDrag *drag,
|
||
|
|
double dx,
|
||
|
|
double dy,
|
||
|
|
gpointer user_data)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (user_data);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
priv->mouse[2] = -priv->mouse[2];
|
||
|
|
priv->mouse[3] = -priv->mouse[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_init (GtkShadertoy *shadertoy)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
GtkGesture *drag;
|
||
|
|
|
||
|
|
priv->image_shader = g_strdup (default_image_shader);
|
||
|
|
priv->tick = gtk_widget_add_tick_callback (GTK_WIDGET (shadertoy), gtk_shadertoy_tick, shadertoy, NULL);
|
||
|
|
|
||
|
|
drag = gtk_gesture_drag_new ();
|
||
|
|
gtk_widget_add_controller (GTK_WIDGET (shadertoy), GTK_EVENT_CONTROLLER (drag));
|
||
|
|
g_signal_connect (drag, "drag-begin", (GCallback)drag_begin_cb, shadertoy);
|
||
|
|
g_signal_connect (drag, "drag-update", (GCallback)drag_update_cb, shadertoy);
|
||
|
|
g_signal_connect (drag, "drag-end", (GCallback)drag_end_cb, shadertoy);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_finalize (GObject *obj)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (obj);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
gtk_widget_remove_tick_callback (GTK_WIDGET (shadertoy), priv->tick);
|
||
|
|
g_free (priv->image_shader);
|
||
|
|
|
||
|
|
G_OBJECT_CLASS (gtk_shadertoy_parent_class)->finalize (obj);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_class_init (GtkShadertoyClass *klass)
|
||
|
|
{
|
||
|
|
GTK_GL_AREA_CLASS (klass)->render = gtk_shadertoy_render;
|
||
|
|
GTK_GL_AREA_CLASS (klass)->resize = gtk_shadertoy_reshape;
|
||
|
|
|
||
|
|
GTK_WIDGET_CLASS (klass)->realize = gtk_shadertoy_realize;
|
||
|
|
GTK_WIDGET_CLASS (klass)->unrealize = gtk_shadertoy_unrealize;
|
||
|
|
|
||
|
|
G_OBJECT_CLASS (klass)->finalize = gtk_shadertoy_finalize;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* new window size or exposure */
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_reshape (GtkGLArea *area, int width, int height)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private ((GtkShadertoy *) area);
|
||
|
|
|
||
|
|
priv->resolution[0] = width;
|
||
|
|
priv->resolution[1] = height;
|
||
|
|
priv->resolution[2] = 1.0; /* screen aspect ratio */
|
||
|
|
|
||
|
|
/* Set the viewport */
|
||
|
|
glViewport (0, 0, (GLint) width, (GLint) height);
|
||
|
|
}
|
||
|
|
|
||
|
|
static GLuint
|
||
|
|
create_shader (int type,
|
||
|
|
const char *src,
|
||
|
|
GError **error)
|
||
|
|
{
|
||
|
|
GLuint shader;
|
||
|
|
int status;
|
||
|
|
|
||
|
|
shader = glCreateShader (type);
|
||
|
|
glShaderSource (shader, 1, &src, NULL);
|
||
|
|
glCompileShader (shader);
|
||
|
|
|
||
|
|
glGetShaderiv (shader, GL_COMPILE_STATUS, &status);
|
||
|
|
if (status == GL_FALSE)
|
||
|
|
{
|
||
|
|
int log_len;
|
||
|
|
char *buffer;
|
||
|
|
|
||
|
|
glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &log_len);
|
||
|
|
|
||
|
|
buffer = g_malloc (log_len + 1);
|
||
|
|
glGetShaderInfoLog (shader, log_len, NULL, buffer);
|
||
|
|
|
||
|
|
g_set_error (error, GDK_GL_ERROR, GDK_GL_ERROR_COMPILATION_FAILED,
|
||
|
|
"Compile failure in %s shader:\n%s",
|
||
|
|
type == GL_VERTEX_SHADER ? "vertex" : "fragment",
|
||
|
|
buffer);
|
||
|
|
|
||
|
|
g_free (buffer);
|
||
|
|
|
||
|
|
glDeleteShader (shader);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return shader;
|
||
|
|
}
|
||
|
|
|
||
|
|
static gboolean
|
||
|
|
init_shaders (GtkShadertoy *shadertoy,
|
||
|
|
const char *vertex_source,
|
||
|
|
const char *fragment_source,
|
||
|
|
GError **error)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
GLuint vertex, fragment;
|
||
|
|
GLuint program = 0;
|
||
|
|
int status;
|
||
|
|
gboolean res = TRUE;
|
||
|
|
|
||
|
|
vertex = create_shader (GL_VERTEX_SHADER, vertex_source, error);
|
||
|
|
if (vertex == 0)
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
fragment = create_shader (GL_FRAGMENT_SHADER, fragment_source, error);
|
||
|
|
if (fragment == 0)
|
||
|
|
{
|
||
|
|
glDeleteShader (vertex);
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
program = glCreateProgram ();
|
||
|
|
glAttachShader (program, vertex);
|
||
|
|
glAttachShader (program, fragment);
|
||
|
|
|
||
|
|
glLinkProgram (program);
|
||
|
|
|
||
|
|
glGetProgramiv (program, GL_LINK_STATUS, &status);
|
||
|
|
if (status == GL_FALSE)
|
||
|
|
{
|
||
|
|
int log_len;
|
||
|
|
char *buffer;
|
||
|
|
|
||
|
|
glGetProgramiv (program, GL_INFO_LOG_LENGTH, &log_len);
|
||
|
|
|
||
|
|
buffer = g_malloc (log_len + 1);
|
||
|
|
glGetProgramInfoLog (program, log_len, NULL, buffer);
|
||
|
|
|
||
|
|
g_set_error (error, GDK_GL_ERROR, GDK_GL_ERROR_LINK_FAILED,
|
||
|
|
"Linking failure:\n%s", buffer);
|
||
|
|
res = FALSE;
|
||
|
|
|
||
|
|
g_free (buffer);
|
||
|
|
|
||
|
|
glDeleteProgram (program);
|
||
|
|
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (priv->program != 0)
|
||
|
|
glDeleteProgram (priv->program);
|
||
|
|
|
||
|
|
priv->program = program;
|
||
|
|
priv->resolution_location = glGetUniformLocation (program, "iResolution");
|
||
|
|
priv->time_location = glGetUniformLocation (program, "iTime");
|
||
|
|
priv->timedelta_location = glGetUniformLocation (program, "iTimeDelta");
|
||
|
|
priv->frame_location = glGetUniformLocation (program, "iFrame");
|
||
|
|
priv->mouse_location = glGetUniformLocation (program, "iMouse");
|
||
|
|
|
||
|
|
glDetachShader (program, vertex);
|
||
|
|
glDetachShader (program, fragment);
|
||
|
|
|
||
|
|
out:
|
||
|
|
/* These are now owned by the program and can be deleted */
|
||
|
|
glDeleteShader (vertex);
|
||
|
|
glDeleteShader (fragment);
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_realize_shader (GtkShadertoy *shadertoy)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
char *fragment_shader;
|
||
|
|
GError *error = NULL;
|
||
|
|
|
||
|
|
fragment_shader = g_strconcat (fragment_prefix, priv->image_shader, fragment_suffix, NULL);
|
||
|
|
if (!init_shaders (shadertoy, shadertoy_vertex_shader, fragment_shader, &error))
|
||
|
|
{
|
||
|
|
priv->error_set = TRUE;
|
||
|
|
gtk_gl_area_set_error (GTK_GL_AREA (shadertoy), error);
|
||
|
|
g_error_free (error);
|
||
|
|
}
|
||
|
|
g_free (fragment_shader);
|
||
|
|
|
||
|
|
/* Start new shader at time zero */
|
||
|
|
priv->first_frame_time = 0;
|
||
|
|
priv->first_frame = 0;
|
||
|
|
|
||
|
|
priv->image_shader_dirty = FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static gboolean
|
||
|
|
gtk_shadertoy_render (GtkGLArea *area,
|
||
|
|
GdkGLContext *context)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (area);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
if (gtk_gl_area_get_error (area) != NULL)
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
if (priv->image_shader_dirty)
|
||
|
|
gtk_shadertoy_realize_shader (shadertoy);
|
||
|
|
|
||
|
|
/* Clear the viewport */
|
||
|
|
glClearColor (0.0, 0.0, 0.0, 1.0);
|
||
|
|
glClear (GL_COLOR_BUFFER_BIT);
|
||
|
|
|
||
|
|
glUseProgram (priv->program);
|
||
|
|
|
||
|
|
/* Update uniforms */
|
||
|
|
if (priv->resolution_location != -1)
|
||
|
|
glUniform3fv (priv->resolution_location, 1, priv->resolution);
|
||
|
|
if (priv->time_location != -1)
|
||
|
|
glUniform1f (priv->time_location, priv->time);
|
||
|
|
if (priv->timedelta_location != -1)
|
||
|
|
glUniform1f (priv->timedelta_location, priv->timedelta);
|
||
|
|
if (priv->frame_location != -1)
|
||
|
|
glUniform1i (priv->frame_location, priv->frame);
|
||
|
|
if (priv->mouse_location != -1)
|
||
|
|
glUniform4fv (priv->mouse_location, 1, priv->mouse);
|
||
|
|
|
||
|
|
/* Use the vertices in our buffer */
|
||
|
|
glBindBuffer (GL_ARRAY_BUFFER, priv->buffer);
|
||
|
|
glEnableVertexAttribArray (0);
|
||
|
|
glVertexAttribPointer (0, 4, GL_FLOAT, GL_FALSE, 0, 0);
|
||
|
|
|
||
|
|
glDrawArrays (GL_TRIANGLES, 0, 6);
|
||
|
|
|
||
|
|
/* We finished using the buffers and program */
|
||
|
|
glDisableVertexAttribArray (0);
|
||
|
|
glBindBuffer (GL_ARRAY_BUFFER, 0);
|
||
|
|
glUseProgram (0);
|
||
|
|
|
||
|
|
/* Flush the contents of the pipeline */
|
||
|
|
glFlush ();
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *
|
||
|
|
gtk_shadertoy_get_image_shader (GtkShadertoy *shadertoy)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
return priv->image_shader;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
gtk_shadertoy_set_image_shader (GtkShadertoy *shadertoy,
|
||
|
|
const char *shader)
|
||
|
|
{
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
g_free (priv->image_shader);
|
||
|
|
priv->image_shader = g_strdup (shader);
|
||
|
|
|
||
|
|
/* Don't override error we didn't set it ourselves */
|
||
|
|
if (priv->error_set)
|
||
|
|
{
|
||
|
|
gtk_gl_area_set_error (GTK_GL_AREA (shadertoy), NULL);
|
||
|
|
priv->error_set = FALSE;
|
||
|
|
}
|
||
|
|
priv->image_shader_dirty = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_realize (GtkWidget *widget)
|
||
|
|
{
|
||
|
|
GtkGLArea *glarea = GTK_GL_AREA (widget);
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (widget);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
|
||
|
|
/* Draw two triangles across whole screen */
|
||
|
|
const GLfloat vertex_data[] = {
|
||
|
|
-1.0f, -1.0f, 0.f, 1.f,
|
||
|
|
-1.0f, 1.0f, 0.f, 1.f,
|
||
|
|
1.0f, 1.0f, 0.f, 1.f,
|
||
|
|
|
||
|
|
-1.0f, -1.0f, 0.f, 1.f,
|
||
|
|
1.0f, 1.0f, 0.f, 1.f,
|
||
|
|
1.0f, -1.0f, 0.f, 1.f,
|
||
|
|
};
|
||
|
|
|
||
|
|
GTK_WIDGET_CLASS (gtk_shadertoy_parent_class)->realize (widget);
|
||
|
|
|
||
|
|
gtk_gl_area_make_current (glarea);
|
||
|
|
if (gtk_gl_area_get_error (glarea) != NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
glGenVertexArrays (1, &priv->vao);
|
||
|
|
glBindVertexArray (priv->vao);
|
||
|
|
|
||
|
|
glGenBuffers (1, &priv->buffer);
|
||
|
|
glBindBuffer (GL_ARRAY_BUFFER, priv->buffer);
|
||
|
|
glBufferData (GL_ARRAY_BUFFER, sizeof (vertex_data), vertex_data, GL_STATIC_DRAW);
|
||
|
|
glBindBuffer (GL_ARRAY_BUFFER, 0);
|
||
|
|
|
||
|
|
gtk_shadertoy_realize_shader (shadertoy);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_shadertoy_unrealize (GtkWidget *widget)
|
||
|
|
{
|
||
|
|
GtkGLArea *glarea = GTK_GL_AREA (widget);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private ((GtkShadertoy *) widget);
|
||
|
|
|
||
|
|
gtk_gl_area_make_current (glarea);
|
||
|
|
if (gtk_gl_area_get_error (glarea) == NULL)
|
||
|
|
{
|
||
|
|
if (priv->buffer != 0)
|
||
|
|
glDeleteBuffers (1, &priv->buffer);
|
||
|
|
|
||
|
|
if (priv->vao != 0)
|
||
|
|
glDeleteVertexArrays (1, &priv->vao);
|
||
|
|
|
||
|
|
if (priv->program != 0)
|
||
|
|
glDeleteProgram (priv->program);
|
||
|
|
}
|
||
|
|
|
||
|
|
GTK_WIDGET_CLASS (gtk_shadertoy_parent_class)->unrealize (widget);
|
||
|
|
}
|
||
|
|
|
||
|
|
static gboolean
|
||
|
|
gtk_shadertoy_tick (GtkWidget *widget,
|
||
|
|
GdkFrameClock *frame_clock,
|
||
|
|
gpointer user_data)
|
||
|
|
{
|
||
|
|
GtkShadertoy *shadertoy = GTK_SHADERTOY (widget);
|
||
|
|
GtkShadertoyPrivate *priv = gtk_shadertoy_get_instance_private (shadertoy);
|
||
|
|
gint64 frame_time;
|
||
|
|
gint64 frame;
|
||
|
|
float previous_time;
|
||
|
|
|
||
|
|
frame = gdk_frame_clock_get_frame_counter (frame_clock);
|
||
|
|
frame_time = gdk_frame_clock_get_frame_time (frame_clock);
|
||
|
|
|
||
|
|
if (priv->first_frame_time == 0)
|
||
|
|
{
|
||
|
|
priv->first_frame_time = frame_time;
|
||
|
|
priv->first_frame = frame;
|
||
|
|
previous_time = 0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
previous_time = priv->time;
|
||
|
|
|
||
|
|
priv->time = (frame_time - priv->first_frame_time) / 1000000.0f;
|
||
|
|
priv->frame = frame - priv->first_frame;
|
||
|
|
priv->timedelta = priv->time - previous_time;
|
||
|
|
|
||
|
|
gtk_widget_queue_draw (widget);
|
||
|
|
|
||
|
|
return G_SOURCE_CONTINUE;
|
||
|
|
}
|