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_multitexture_quad_single_primitive: avoid wrap overrides

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This avoids using the wrap mode overrides mechanism to implement
_cogl_multitexture_quad_single_primitive which requires memsetting a
fairly large array. This updates it to use cogl_pipeline_foreach_layer()
and we now derive an override_material to handle changes to the wrap
modes instead of using the CoglPipelineWrapModeOverrides.
This commit is contained in:
Robert Bragg 2010-11-01 18:33:17 +00:00
parent a25aad954e
commit 636310a81e
1 changed files with 151 additions and 114 deletions
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265
cogl/cogl-primitives.c
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@ -331,6 +331,138 @@ _cogl_texture_quad_multiple_primitives (CoglHandle tex_handle,
&state);
}
typedef struct _ValidateTexCoordsState
{
int i;
int n_layers;
const float *user_tex_coords;
int user_tex_coords_len;
float *final_tex_coords;
CoglPipeline *override_pipeline;
gboolean needs_multiple_primitives;
} ValidateTexCoordsState;
/*
* Validate the texture coordinates for this rectangle.
*/
static gboolean
validate_tex_coords_cb (CoglPipeline *pipeline,
int layer_index,
void *user_data)
{
ValidateTexCoordsState *state = user_data;
CoglHandle texture;
const float *in_tex_coords;
float *out_tex_coords;
float default_tex_coords[4] = {0.0, 0.0, 1.0, 1.0};
CoglTransformResult transform_result;
state->i++;
texture = _cogl_pipeline_get_layer_texture (pipeline, layer_index);
/* NB: NULL textures are handled by _cogl_pipeline_flush_gl_state */
if (!texture)
return TRUE;
/* FIXME: we should be able to avoid this copying when no
* transform is required by the texture backend and the user
* has supplied enough coordinates for all the layers.
*/
/* If the user didn't supply texture coordinates for this layer
then use the default coords */
if (state->i >= state->user_tex_coords_len / 4)
in_tex_coords = default_tex_coords;
else
in_tex_coords = &state->user_tex_coords[state->i * 4];
out_tex_coords = &state->final_tex_coords[state->i * 4];
memcpy (out_tex_coords, in_tex_coords, sizeof (float) * 4);
/* Convert the texture coordinates to GL.
*/
transform_result =
_cogl_texture_transform_quad_coords_to_gl (texture,
out_tex_coords);
/* If the texture has waste or we are using GL_TEXTURE_RECT we
* can't handle texture repeating so we can't use the layer if
* repeating is required.
*
* NB: We already know that no texture matrix is being used if the
* texture doesn't support hardware repeat.
*/
if (transform_result == COGL_TRANSFORM_SOFTWARE_REPEAT)
{
if (state->i == 0)
{
if (state->n_layers > 1)
{
static gboolean warning_seen = FALSE;
if (!warning_seen)
g_warning ("Skipping layers 1..n of your material since "
"the first layer doesn't support hardware "
"repeat (e.g. because of waste or use of "
"GL_TEXTURE_RECTANGLE_ARB) and you supplied "
"texture coordinates outside the range [0,1]."
"Falling back to software repeat assuming "
"layer 0 is the most important one keep");
warning_seen = TRUE;
}
if (state->override_pipeline)
cogl_object_unref (state->override_pipeline);
state->needs_multiple_primitives = TRUE;
return FALSE;
}
else
{
static gboolean warning_seen = FALSE;
if (!warning_seen)
g_warning ("Skipping layer %d of your material "
"since you have supplied texture coords "
"outside the range [0,1] but the texture "
"doesn't support hardware repeat (e.g. "
"because of waste or use of "
"GL_TEXTURE_RECTANGLE_ARB). This isn't "
"supported with multi-texturing.", state->i);
warning_seen = TRUE;
cogl_pipeline_set_layer_texture (texture, layer_index, NULL);
}
}
/* By default WRAP_MODE_AUTOMATIC becomes to CLAMP_TO_EDGE. If
the texture coordinates need repeating then we'll override
this to GL_REPEAT. Otherwise we'll leave it at CLAMP_TO_EDGE
so that it won't blend in pixels from the opposite side when
the full texture is drawn with GL_LINEAR filter mode */
if (transform_result == COGL_TRANSFORM_HARDWARE_REPEAT)
{
if (cogl_pipeline_get_layer_wrap_mode_s (pipeline, layer_index) ==
COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
{
if (!state->override_pipeline)
state->override_pipeline = cogl_pipeline_copy (pipeline);
cogl_pipeline_set_layer_wrap_mode_s (state->override_pipeline,
layer_index,
COGL_PIPELINE_WRAP_MODE_REPEAT);
}
if (cogl_pipeline_get_layer_wrap_mode_t (pipeline, layer_index) ==
COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
{
if (!state->override_pipeline)
state->override_pipeline = cogl_pipeline_copy (pipeline);
cogl_pipeline_set_layer_wrap_mode_t (state->override_pipeline,
layer_index,
COGL_PIPELINE_WRAP_MODE_REPEAT);
}
}
return TRUE;
}
/* This path supports multitexturing but only when each of the layers is
* handled with a single GL texture. Also if repeating is necessary then
* _cogl_texture_can_hardware_repeat() must return TRUE.
@ -354,131 +486,36 @@ _cogl_multitexture_quad_single_primitive (const float *position,
const float *user_tex_coords,
int user_tex_coords_len)
{
int n_layers = cogl_pipeline_get_n_layers (pipeline);
float *final_tex_coords = alloca (sizeof (float) * 4 * n_layers);
const GList *layers;
GList *tmp;
int i;
CoglPipelineWrapModeOverrides wrap_mode_overrides;
/* This will be set to point to wrap_mode_overrides when an override
is needed */
CoglPipelineWrapModeOverrides *wrap_mode_overrides_p = NULL;
int n_layers = cogl_pipeline_get_n_layers (pipeline);
ValidateTexCoordsState state;
float *final_tex_coords = alloca (sizeof (float) * 4 * n_layers);
_COGL_GET_CONTEXT (ctx, FALSE);
memset (&wrap_mode_overrides, 0, sizeof (wrap_mode_overrides));
state.i = -1;
state.n_layers = n_layers;
state.user_tex_coords = user_tex_coords;
state.user_tex_coords_len = user_tex_coords_len;
state.final_tex_coords = final_tex_coords;
state.override_pipeline = NULL;
state.needs_multiple_primitives = FALSE;
/*
* Validate the texture coordinates for this rectangle.
*/
layers = _cogl_pipeline_get_layers (pipeline);
for (tmp = (GList *)layers, i = 0; tmp != NULL; tmp = tmp->next, i++)
{
CoglHandle layer = (CoglHandle)tmp->data;
CoglHandle tex_handle;
const float *in_tex_coords;
float *out_tex_coords;
float default_tex_coords[4] = {0.0, 0.0, 1.0, 1.0};
CoglTransformResult transform_result;
cogl_pipeline_foreach_layer (pipeline,
validate_tex_coords_cb,
&state);
tex_handle = _cogl_pipeline_layer_get_texture (layer);
if (state.needs_multiple_primitives)
return FALSE;
/* COGL_INVALID_HANDLE textures are handled by
* _cogl_pipeline_flush_gl_state */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
/* If the user didn't supply texture coordinates for this layer
then use the default coords */
if (i >= user_tex_coords_len / 4)
in_tex_coords = default_tex_coords;
else
in_tex_coords = &user_tex_coords[i * 4];
out_tex_coords = &final_tex_coords[i * 4];
memcpy (out_tex_coords, in_tex_coords, sizeof (GLfloat) * 4);
/* Convert the texture coordinates to GL.
*/
transform_result =
_cogl_texture_transform_quad_coords_to_gl (tex_handle,
out_tex_coords);
/* If the texture has waste or we are using GL_TEXTURE_RECT we
* can't handle texture repeating so we can't use the layer if
* repeating is required.
*
* NB: We already know that no texture matrix is being used if the
* texture doesn't support hardware repeat.
*/
if (transform_result == COGL_TRANSFORM_SOFTWARE_REPEAT)
{
if (i == 0)
{
if (n_layers > 1)
{
static gboolean warning_seen = FALSE;
if (!warning_seen)
g_warning ("Skipping layers 1..n of your material since "
"the first layer doesn't support hardware "
"repeat (e.g. because of waste or use of "
"GL_TEXTURE_RECTANGLE_ARB) and you supplied "
"texture coordinates outside the range [0,1]."
"Falling back to software repeat assuming "
"layer 0 is the most important one keep");
warning_seen = TRUE;
}
return FALSE;
}
else
{
static gboolean warning_seen = FALSE;
if (!warning_seen)
g_warning ("Skipping layer %d of your material "
"since you have supplied texture coords "
"outside the range [0,1] but the texture "
"doesn't support hardware repeat (e.g. "
"because of waste or use of "
"GL_TEXTURE_RECTANGLE_ARB). This isn't "
"supported with multi-texturing.", i);
warning_seen = TRUE;
/* NB: marking for fallback will replace the layer with
* a default transparent texture */
fallback_layers |= (1 << i);
}
}
/* By default WRAP_MODE_AUTOMATIC becomes to CLAMP_TO_EDGE. If
the texture coordinates need repeating then we'll override
this to GL_REPEAT. Otherwise we'll leave it at CLAMP_TO_EDGE
so that it won't blend in pixels from the opposite side when
the full texture is drawn with GL_LINEAR filter mode */
if (transform_result == COGL_TRANSFORM_HARDWARE_REPEAT)
{
if (_cogl_pipeline_layer_get_wrap_mode_s (layer) ==
COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
{
wrap_mode_overrides.values[i].s
= COGL_PIPELINE_WRAP_MODE_OVERRIDE_REPEAT;
wrap_mode_overrides_p = &wrap_mode_overrides;
}
if (_cogl_pipeline_layer_get_wrap_mode_t (layer) ==
COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
{
wrap_mode_overrides.values[i].t
= COGL_PIPELINE_WRAP_MODE_OVERRIDE_REPEAT;
wrap_mode_overrides_p = &wrap_mode_overrides;
}
}
}
if (state.override_pipeline)
pipeline = state.override_pipeline;
_cogl_journal_log_quad (position,
pipeline,
n_layers,
fallback_layers,
0, /* we don't need fallback layers */
0, /* don't replace the layer0 texture */
wrap_mode_overrides_p,
NULL, /* we never use wrap mode overrides */
final_tex_coords,
n_layers * 4);