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