static CoglBool
_cogl_pipeline_fragend_fixed_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
int highest_unit_index = -1;
int i;
_COGL_GET_CONTEXT (ctx, FALSE);
_cogl_pipeline_foreach_layer_internal (pipeline,
get_highest_unit_index_cb,
&highest_unit_index);
/* Disable additional texture units that may have previously been in use.. */
for (i = highest_unit_index + 1; i < ctx->texture_units->len; i++)
_cogl_disable_texture_unit (i);
return TRUE;
}
static CoglBool
_cogl_pipeline_fragend_fixed_add_layer (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference)
{
CoglTextureUnit *unit =
_cogl_get_texture_unit (_cogl_pipeline_layer_get_unit_index (layer));
int unit_index = unit->index;
int n_rgb_func_args;
int n_alpha_func_args;
_COGL_GET_CONTEXT (ctx, FALSE);
/* XXX: Beware that since we are changing the active texture unit we
* must make sure we don't call into other Cogl components that may
* temporarily bind texture objects to query/modify parameters since
* they will end up binding texture unit 1. See
* _cogl_bind_gl_texture_transient for more details.
*/
_cogl_set_active_texture_unit (unit_index);
if (G_UNLIKELY (unit_index >= get_max_texture_units ()))
{
_cogl_disable_texture_unit (unit_index);
/* TODO: although this isn't considered an error that
* warrants falling back to a different backend we
* should print a warning here. */
return TRUE;
}
/* Handle enabling or disabling the right texture type */
if (layers_difference & COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE)
{
CoglTextureType texture_type =
_cogl_pipeline_layer_get_texture_type (layer);
GLenum gl_target;
switch (texture_type)
{
case COGL_TEXTURE_TYPE_2D:
gl_target = GL_TEXTURE_2D;
break;
case COGL_TEXTURE_TYPE_3D:
gl_target = GL_TEXTURE_3D;
break;
case COGL_TEXTURE_TYPE_RECTANGLE:
gl_target = GL_TEXTURE_RECTANGLE_ARB;
break;
}
_cogl_set_active_texture_unit (unit_index);
/* The common GL code handles binding the right texture so we
just need to handle enabling and disabling it */
if (unit->enabled_gl_target != gl_target)
{
/* Disable the previous target if it's still enabled */
if (unit->enabled_gl_target)
GE (ctx, glDisable (unit->enabled_gl_target));
/* Enable the new target */
if (!G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_TEXTURING)))
{
GE (ctx, glEnable (gl_target));
unit->enabled_gl_target = gl_target;
}
}
}
else
{
/* Even though there may be no difference between the last flushed
* texture state and the current layers texture state it may be that the
* texture unit has been disabled for some time so we need to assert that
* it's enabled now.
*/
if (!G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_TEXTURING)) &&
unit->enabled_gl_target == 0)
{
_cogl_set_active_texture_unit (unit_index);
GE (ctx, glEnable (unit->gl_target));
unit->enabled_gl_target = unit->gl_target;
}
}
if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE)
{
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer,
COGL_PIPELINE_LAYER_STATE_COMBINE);
CoglPipelineLayerBigState *big_state = authority->big_state;
GLenum sources[3];
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE));
/* Set the combiner functions... */
GE (ctx, glTexEnvi (GL_TEXTURE_ENV,
GL_COMBINE_RGB,
big_state->texture_combine_rgb_func));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV,
GL_COMBINE_ALPHA,
big_state->texture_combine_alpha_func));
/*
* Setup the function arguments...
*/
/* For the RGB components... */
n_rgb_func_args =
_cogl_get_n_args_for_combine_func (big_state->texture_combine_rgb_func);
translate_sources (pipeline,
n_rgb_func_args,
big_state->texture_combine_rgb_src,
sources);
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_RGB,
sources[0]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_RGB,
big_state->texture_combine_rgb_op[0]));
if (n_rgb_func_args > 1)
{
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_RGB,
sources[1]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_RGB,
big_state->texture_combine_rgb_op[1]));
}
if (n_rgb_func_args > 2)
{
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_RGB,
sources[2]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_RGB,
big_state->texture_combine_rgb_op[2]));
}
/* For the Alpha component */
n_alpha_func_args =
_cogl_get_n_args_for_combine_func (big_state->texture_combine_alpha_func);
translate_sources (pipeline,
n_alpha_func_args,
big_state->texture_combine_alpha_src,
sources);
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_ALPHA,
sources[0]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
big_state->texture_combine_alpha_op[0]));
if (n_alpha_func_args > 1)
{
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_ALPHA,
sources[1]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
big_state->texture_combine_alpha_op[1]));
}
if (n_alpha_func_args > 2)
{
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_ALPHA,
sources[2]));
GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
big_state->texture_combine_alpha_op[2]));
}
}
if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT)
{
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority
(layer, COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT);
CoglPipelineLayerBigState *big_state = authority->big_state;
GE (ctx, glTexEnvfv (GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,
big_state->texture_combine_constant));
}
return TRUE;
}
static gboolean
_cogl_pipeline_fragend_fixed_end (CoglPipeline *pipeline,
unsigned long pipelines_difference)
{
int highest_unit_index = -1;
int i;
_COGL_GET_CONTEXT (ctx, FALSE);
_cogl_pipeline_foreach_layer_internal (pipeline,
get_highest_unit_index_cb,
&highest_unit_index);
/* Disable additional texture units that may have previously been in use.. */
for (i = highest_unit_index + 1; i < ctx->texture_units->len; i++)
_cogl_disable_texture_unit (i);
if (pipelines_difference & COGL_PIPELINE_STATE_FOG)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_FOG);
CoglPipelineFogState *fog_state = &authority->big_state->fog_state;
if (fog_state->enabled)
{
GLfloat fogColor[4];
GLenum gl_mode = GL_LINEAR;
fogColor[0] = cogl_color_get_red_float (&fog_state->color);
fogColor[1] = cogl_color_get_green_float (&fog_state->color);
fogColor[2] = cogl_color_get_blue_float (&fog_state->color);
fogColor[3] = cogl_color_get_alpha_float (&fog_state->color);
GE (ctx, glEnable (GL_FOG));
GE (ctx, glFogfv (GL_FOG_COLOR, fogColor));
if (ctx->driver == COGL_DRIVER_GLES1)
switch (fog_state->mode)
{
case COGL_FOG_MODE_LINEAR:
gl_mode = GL_LINEAR;
break;
case COGL_FOG_MODE_EXPONENTIAL:
gl_mode = GL_EXP;
break;
case COGL_FOG_MODE_EXPONENTIAL_SQUARED:
gl_mode = GL_EXP2;
break;
}
/* TODO: support other modes for GLES2 */
/* NB: GLES doesn't have glFogi */
GE (ctx, glFogf (GL_FOG_MODE, gl_mode));
GE (ctx, glHint (GL_FOG_HINT, GL_NICEST));
GE (ctx, glFogf (GL_FOG_DENSITY, fog_state->density));
GE (ctx, glFogf (GL_FOG_START, fog_state->z_near));
GE (ctx, glFogf (GL_FOG_END, fog_state->z_far));
}
else
GE (ctx, glDisable (GL_FOG));
}
return TRUE;
}
