mirror of
https://github.com/brl/mutter.git
synced 2024-09-20 06:25:51 -04:00
cogl-pipeline-progend-glsl: Generalize updating GLES2 uniforms
The uniforms for the alpha test reference value and point size on GLES2 are updating using similar code. This generalizes the code so that there is a static array of predefined builtin uniforms which contains the uniform name, a pointer to a function to get the value from the pipeline, a pointer to a function to update the uniform and a flag representing which CoglPipelineState change affects the uniform. The uniforms are then updated in a loop. This should simplify adding more builtin uniforms.
This commit is contained in:
Neil Roberts
parent
b2285058a4
commit
242d9a5002
@ -56,6 +56,37 @@
|
||||
#define glUniform1f ctx->drv.pf_glUniform1f
|
||||
#define glUniform4fv ctx->drv.pf_glUniform4fv
|
||||
|
||||
#else
|
||||
|
||||
/* These are used to generalise updating some uniforms that are
|
||||
required when building for GLES2 */
|
||||
|
||||
typedef void (* UpdateUniformFunc) (CoglPipeline *pipeline,
|
||||
int uniform_location,
|
||||
void *getter_func);
|
||||
|
||||
static void update_float_uniform (CoglPipeline *pipeline,
|
||||
int uniform_location,
|
||||
void *getter_func);
|
||||
|
||||
typedef struct
|
||||
{
|
||||
const char *uniform_name;
|
||||
void *getter_func;
|
||||
UpdateUniformFunc update_func;
|
||||
CoglPipelineState change;
|
||||
} BuiltinUniformData;
|
||||
|
||||
static BuiltinUniformData builtin_uniforms[] =
|
||||
{
|
||||
{ "cogl_point_size_in",
|
||||
cogl_pipeline_get_point_size, update_float_uniform,
|
||||
COGL_PIPELINE_STATE_POINT_SIZE },
|
||||
{ "_cogl_alpha_test_ref",
|
||||
cogl_pipeline_get_alpha_test_reference, update_float_uniform,
|
||||
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE }
|
||||
};
|
||||
|
||||
#endif /* HAVE_COGL_GLES2 */
|
||||
|
||||
const CoglPipelineProgend _cogl_pipeline_glsl_progend;
|
||||
@ -90,13 +121,8 @@ typedef struct
|
||||
int n_tex_coord_attribs;
|
||||
|
||||
#ifdef HAVE_COGL_GLES2
|
||||
/* Under GLES2 the alpha test is implemented in the shader. We need
|
||||
a uniform for the reference value */
|
||||
gboolean dirty_alpha_test_reference;
|
||||
GLint alpha_test_reference_uniform;
|
||||
|
||||
gboolean dirty_point_size;
|
||||
GLint point_size_uniform;
|
||||
unsigned long dirty_builtin_uniforms;
|
||||
GLint builtin_uniform_locations[G_N_ELEMENTS (builtin_uniforms)];
|
||||
|
||||
/* Under GLES2 we can't use the builtin functions to set attribute
|
||||
pointers such as the vertex position. Instead the vertex
|
||||
@ -454,37 +480,23 @@ update_constants_cb (CoglPipeline *pipeline,
|
||||
#ifdef HAVE_COGL_GLES2
|
||||
|
||||
static void
|
||||
update_alpha_test_reference (CoglPipeline *pipeline,
|
||||
GLuint gl_program,
|
||||
CoglPipelineProgendPrivate *priv)
|
||||
update_builtin_uniforms (CoglPipeline *pipeline,
|
||||
GLuint gl_program,
|
||||
CoglPipelineProgendPrivate *priv)
|
||||
{
|
||||
float alpha_reference;
|
||||
int i;
|
||||
|
||||
if (priv->dirty_alpha_test_reference &&
|
||||
priv->alpha_test_reference_uniform != -1)
|
||||
{
|
||||
alpha_reference = cogl_pipeline_get_alpha_test_reference (pipeline);
|
||||
if (priv->dirty_builtin_uniforms == 0)
|
||||
return;
|
||||
|
||||
GE( glUniform1f (priv->alpha_test_reference_uniform,
|
||||
alpha_reference) );
|
||||
for (i = 0; i < G_N_ELEMENTS (builtin_uniforms); i++)
|
||||
if ((priv->dirty_builtin_uniforms & (1 << i)) &&
|
||||
priv->builtin_uniform_locations[i] != -1)
|
||||
builtin_uniforms[i].update_func (pipeline,
|
||||
priv->builtin_uniform_locations[i],
|
||||
builtin_uniforms[i].getter_func);
|
||||
|
||||
priv->dirty_alpha_test_reference = FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
update_point_size (CoglPipeline *pipeline,
|
||||
GLuint gl_program,
|
||||
CoglPipelineProgendPrivate *priv)
|
||||
{
|
||||
if (priv->dirty_point_size && priv->point_size_uniform != -1)
|
||||
{
|
||||
float point_size = cogl_pipeline_get_point_size (pipeline);
|
||||
|
||||
GE( glUniform1f (priv->point_size_uniform, point_size) );
|
||||
|
||||
priv->dirty_point_size = FALSE;
|
||||
}
|
||||
priv->dirty_builtin_uniforms = 0;
|
||||
}
|
||||
|
||||
#endif /* HAVE_COGL_GLES2 */
|
||||
@ -650,12 +662,15 @@ _cogl_pipeline_progend_glsl_end (CoglPipeline *pipeline,
|
||||
#ifdef HAVE_COGL_GLES2
|
||||
if (program_changed)
|
||||
{
|
||||
int i;
|
||||
|
||||
clear_attribute_cache (priv);
|
||||
clear_flushed_matrix_stacks (priv);
|
||||
|
||||
GE_RET( priv->alpha_test_reference_uniform,
|
||||
glGetUniformLocation (gl_program,
|
||||
"_cogl_alpha_test_ref") );
|
||||
for (i = 0; i < G_N_ELEMENTS (builtin_uniforms); i++)
|
||||
GE_RET( priv->builtin_uniform_locations[i],
|
||||
glGetUniformLocation (gl_program,
|
||||
builtin_uniforms[i].uniform_name) );
|
||||
|
||||
GE_RET( priv->modelview_uniform,
|
||||
glGetUniformLocation (gl_program,
|
||||
@ -668,20 +683,12 @@ _cogl_pipeline_progend_glsl_end (CoglPipeline *pipeline,
|
||||
GE_RET( priv->mvp_uniform,
|
||||
glGetUniformLocation (gl_program,
|
||||
"cogl_modelview_projection_matrix") );
|
||||
|
||||
GE_RET( priv->point_size_uniform,
|
||||
glGetUniformLocation (gl_program,
|
||||
"cogl_point_size_in") );
|
||||
}
|
||||
if (program_changed ||
|
||||
priv->last_used_for_pipeline != pipeline)
|
||||
{
|
||||
priv->dirty_alpha_test_reference = TRUE;
|
||||
priv->dirty_point_size = TRUE;
|
||||
}
|
||||
priv->dirty_builtin_uniforms = ~(unsigned long) 0;
|
||||
|
||||
update_alpha_test_reference (pipeline, gl_program, priv);
|
||||
update_point_size (pipeline, gl_program, priv);
|
||||
update_builtin_uniforms (pipeline, gl_program, priv);
|
||||
#endif
|
||||
|
||||
if (user_program)
|
||||
@ -702,17 +709,18 @@ _cogl_pipeline_progend_glsl_pre_change_notify (CoglPipeline *pipeline,
|
||||
if ((change & COGL_PIPELINE_STATE_AFFECTS_FRAGMENT_CODEGEN))
|
||||
dirty_glsl_program_state (pipeline);
|
||||
#ifdef HAVE_COGL_GLES2
|
||||
else if ((change & COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE))
|
||||
else
|
||||
{
|
||||
CoglPipelineProgendPrivate *priv = get_glsl_priv (pipeline);
|
||||
if (priv)
|
||||
priv->dirty_alpha_test_reference = TRUE;
|
||||
}
|
||||
else if ((change & COGL_PIPELINE_STATE_POINT_SIZE))
|
||||
{
|
||||
CoglPipelineProgendPrivate *priv = get_glsl_priv (pipeline);
|
||||
if (priv)
|
||||
priv->dirty_point_size = TRUE;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < G_N_ELEMENTS (builtin_uniforms); i++)
|
||||
if ((change & builtin_uniforms[i].change))
|
||||
{
|
||||
CoglPipelineProgendPrivate *priv = get_glsl_priv (pipeline);
|
||||
if (priv)
|
||||
priv->dirty_builtin_uniforms |= 1 << i;
|
||||
return;
|
||||
}
|
||||
}
|
||||
#endif /* HAVE_COGL_GLES2 */
|
||||
}
|
||||
@ -911,6 +919,18 @@ _cogl_pipeline_progend_glsl_pre_paint (CoglPipeline *pipeline)
|
||||
priv);
|
||||
}
|
||||
|
||||
static void
|
||||
update_float_uniform (CoglPipeline *pipeline,
|
||||
int uniform_location,
|
||||
void *getter_func)
|
||||
{
|
||||
float (* float_getter_func) (CoglPipeline *) = getter_func;
|
||||
float value;
|
||||
|
||||
value = float_getter_func (pipeline);
|
||||
GE( glUniform1f (uniform_location, value) );
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
const CoglPipelineProgend _cogl_pipeline_glsl_progend =
|
||||
|
||||
Loading…
Reference in New Issue
Block a user