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#include "config.h"
#include "gskglshadercacheprivate.h"
#include "gskdebugprivate.h"
#include <epoxy/gl.h>
struct _GskGLShaderCache
{
GObject parent_instance;
GHashTable *shader_cache;
GHashTable *program_cache;
};
G_DEFINE_TYPE (GskGLShaderCache, gsk_gl_shader_cache, G_TYPE_OBJECT)
static void
gsk_gl_shader_cache_finalize (GObject *gobject)
{
GskGLShaderCache *self = GSK_GL_SHADER_CACHE (gobject);
g_clear_pointer (&self->shader_cache, g_hash_table_unref);
g_clear_pointer (&self->program_cache, g_hash_table_unref);
G_OBJECT_CLASS (gsk_gl_shader_cache_parent_class)->finalize (gobject);
}
static void
gsk_gl_shader_cache_class_init (GskGLShaderCacheClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = gsk_gl_shader_cache_finalize;
}
static void
gsk_gl_shader_cache_init (GskGLShaderCache *self)
{
}
GskGLShaderCache *
gsk_gl_shader_cache_new (void)
{
return g_object_new (GSK_TYPE_GL_SHADER_CACHE, NULL);
}
static void
delete_shader (gpointer data)
{
int shader_id = GPOINTER_TO_INT (data);
if (shader_id > 0)
glDeleteShader (shader_id);
}
static void
delete_program (gpointer data)
{
int program_id = GPOINTER_TO_INT (data);
if (program_id > 0)
glDeleteProgram (program_id);
}
int
gsk_gl_shader_cache_compile_shader (GskGLShaderCache *cache,
int shader_type,
const char *source,
GError **error)
{
if (cache->shader_cache == NULL)
cache->shader_cache = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free,
delete_shader);
char *shasum = g_compute_checksum_for_string (G_CHECKSUM_SHA256, source, -1);
int shader_id = GPOINTER_TO_INT (g_hash_table_lookup (cache->shader_cache, shasum));
if (shader_id != 0)
{
GSK_NOTE (SHADERS,
g_debug ("*** Cache hit for %s shader (checksum: %s) ***\n"
"%*s%s\n",
shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
shasum,
64, source,
strlen (source) < 64 ? "" : "..."));
g_free (shasum);
return shader_id;
}
shader_id = glCreateShader (shader_type);
glShaderSource (shader_id, 1, (const GLchar **) &source, NULL);
glCompileShader (shader_id);
GSK_NOTE (SHADERS,
g_debug ("*** Compiling %s shader ***\n"
"%*s%s\n",
shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
64, source,
strlen (source) < 64 ? "" : "..."));
int status = GL_FALSE;
glGetShaderiv (shader_id, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE)
{
int log_len = 0;
glGetShaderiv (shader_id, GL_INFO_LOG_LENGTH, &log_len);
char *buffer = g_malloc0 (log_len + 1);
glGetShaderInfoLog (shader_id, log_len, NULL, buffer);
g_set_error (error, GDK_GL_ERROR, GDK_GL_ERROR_COMPILATION_FAILED,
"Compilation failure in %s shader:\n%s",
shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
buffer);
g_free (buffer);
glDeleteShader (shader_id);
shader_id = -1;
}
else
{
g_hash_table_insert (cache->shader_cache,
shasum,
GINT_TO_POINTER (shader_id));
}
return shader_id;
}
int
gsk_gl_shader_cache_link_program (GskGLShaderCache *cache,
int vertex_shader,
int fragment_shader,
GError **error)
{
g_return_val_if_fail (vertex_shader > 0 && fragment_shader > 0, -1);
if (cache->program_cache == NULL)
cache->program_cache = g_hash_table_new_full (g_int64_hash, g_int64_equal,
g_free,
delete_program);
gint64 *key = g_new (gint64, 1);
*key = (gint64) vertex_shader << 31 | fragment_shader;
int program_id = GPOINTER_TO_INT (g_hash_table_lookup (cache->program_cache, key));
if (program_id > 0)
{
GSK_NOTE (SHADERS,
g_debug ("*** Cache hit for program (vertex: %d, fragment: %d) ***",
vertex_shader,
fragment_shader));
g_free (key);
return program_id;
}
program_id = glCreateProgram ();
GSK_NOTE (SHADERS,
g_debug ("*** Linking %d, %d shaders ***\n",
vertex_shader,
fragment_shader));
glAttachShader (program_id, vertex_shader);
glAttachShader (program_id, fragment_shader);
glLinkProgram (program_id);
int status = GL_FALSE;
glGetProgramiv (program_id, GL_LINK_STATUS, &status);
if (status == GL_FALSE)
{
int log_len = 0;
glGetProgramiv (program_id, GL_INFO_LOG_LENGTH, &log_len);
char *buffer = g_malloc0 (log_len + 1);
glGetProgramInfoLog (program_id, log_len, NULL, buffer);
g_set_error (error, GDK_GL_ERROR, GDK_GL_ERROR_LINK_FAILED,
"Linking failure in shader:\n%s", buffer);
g_free (buffer);
glDeleteProgram (program_id);
program_id = -1;
}
else
{
glDetachShader (program_id, vertex_shader);
glDetachShader (program_id, fragment_shader);
g_hash_table_insert (cache->program_cache,
key,
GINT_TO_POINTER (program_id));
}
return program_id;
}
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