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cogl/matrix-stack: Use graphene APIs
This one is a bit tricky. The tl;dr; is that switching from right-hand multiplication to left-hand multiplication required applying the stack from left to root. This actually allowed simplifying the code a bit, since CoglMatrixEntry only stores a pointer to its parent, and that's all we need to know for left-hand multiplication. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1439
This commit is contained in:
Georges Basile Stavracas Neto
parent
d03ffe1e97
commit
9e1004da0c
@ -238,9 +238,9 @@ cogl_matrix_stack_frustum (CoglMatrixStack *stack,
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_cogl_matrix_stack_push_replacement_entry (stack,
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COGL_MATRIX_OP_LOAD);
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cogl_matrix_init_identity (&entry->matrix);
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cogl_matrix_frustum (&entry->matrix,
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left, right, bottom, top,
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graphene_matrix_init_frustum (&entry->matrix,
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left, right,
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bottom, top,
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z_near, z_far);
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}
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@ -256,9 +256,9 @@ cogl_matrix_stack_perspective (CoglMatrixStack *stack,
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entry =
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_cogl_matrix_stack_push_replacement_entry (stack,
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COGL_MATRIX_OP_LOAD);
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cogl_matrix_init_identity (&entry->matrix);
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cogl_matrix_perspective (&entry->matrix,
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fov_y, aspect, z_near, z_far);
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graphene_matrix_init_perspective (&entry->matrix,
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fov_y, aspect,
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z_near, z_far);
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}
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void
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@ -275,9 +275,10 @@ cogl_matrix_stack_orthographic (CoglMatrixStack *stack,
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entry =
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_cogl_matrix_stack_push_replacement_entry (stack,
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COGL_MATRIX_OP_LOAD);
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cogl_matrix_init_identity (&entry->matrix);
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cogl_matrix_orthographic (&entry->matrix,
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x_1, y_1, x_2, y_2, near, far);
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graphene_matrix_init_ortho (&entry->matrix,
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x_1, x_2,
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y_2, y_1,
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near, far);
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}
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void
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@ -372,26 +373,61 @@ graphene_matrix_t *
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cogl_matrix_entry_get (CoglMatrixEntry *entry,
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graphene_matrix_t *matrix)
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{
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int depth;
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CoglMatrixEntry *current;
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CoglMatrixEntry **children;
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int i;
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int depth;
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for (depth = 0, current = entry;
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graphene_matrix_init_identity (matrix);
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for (current = entry, depth = 0;
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current;
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current = current->parent, depth++)
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{
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switch (current->op)
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{
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case COGL_MATRIX_OP_TRANSLATE:
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{
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CoglMatrixEntryTranslate *translate =
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(CoglMatrixEntryTranslate *) current;
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graphene_matrix_translate (matrix, &translate->translate);
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break;
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}
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case COGL_MATRIX_OP_ROTATE:
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{
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CoglMatrixEntryRotate *rotate =
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(CoglMatrixEntryRotate *) current;
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graphene_matrix_rotate (matrix, rotate->angle, &rotate->axis);
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break;
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}
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case COGL_MATRIX_OP_ROTATE_EULER:
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{
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CoglMatrixEntryRotateEuler *rotate =
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(CoglMatrixEntryRotateEuler *) current;
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graphene_matrix_rotate_euler (matrix, &rotate->euler);
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break;
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}
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case COGL_MATRIX_OP_SCALE:
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{
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CoglMatrixEntryScale *scale =
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(CoglMatrixEntryScale *) current;
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graphene_matrix_scale (matrix, scale->x, scale->y, scale->z);
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break;
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}
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case COGL_MATRIX_OP_MULTIPLY:
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{
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CoglMatrixEntryMultiply *multiply =
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(CoglMatrixEntryMultiply *) current;
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graphene_matrix_multiply (matrix, &multiply->matrix, matrix);
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break;
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}
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case COGL_MATRIX_OP_LOAD_IDENTITY:
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cogl_matrix_init_identity (matrix);
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goto initialized;
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goto applied;
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case COGL_MATRIX_OP_LOAD:
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{
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CoglMatrixEntryLoad *load = (CoglMatrixEntryLoad *) current;
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_cogl_matrix_init_from_matrix_without_inverse (matrix,
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&load->matrix);
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goto initialized;
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graphene_matrix_multiply (matrix, &load->matrix, matrix);
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goto applied;
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}
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case COGL_MATRIX_OP_SAVE:
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{
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@ -401,15 +437,30 @@ cogl_matrix_entry_get (CoglMatrixEntry *entry,
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cogl_matrix_entry_get (current->parent, &save->cache);
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save->cache_valid = TRUE;
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}
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_cogl_matrix_init_from_matrix_without_inverse (matrix, &save->cache);
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goto initialized;
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graphene_matrix_multiply (matrix, &save->cache, matrix);
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goto applied;
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}
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default:
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continue;
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}
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}
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initialized:
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applied:
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#ifdef COGL_ENABLE_DEBUG
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if (!current)
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{
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g_warning ("Inconsistent matrix stack");
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return NULL;
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}
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entry->composite_gets++;
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if (COGL_DEBUG_ENABLED (COGL_DEBUG_PERFORMANCE) &&
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entry->composite_gets >= 2)
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{
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COGL_NOTE (PERFORMANCE,
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"Re-composing a matrix stack entry multiple times");
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}
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#endif
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if (depth == 0)
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{
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@ -438,97 +489,6 @@ initialized:
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return NULL;
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}
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#ifdef COGL_ENABLE_DEBUG
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if (!current)
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{
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g_warning ("Inconsistent matrix stack");
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return NULL;
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}
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entry->composite_gets++;
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#endif
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children = g_alloca (sizeof (CoglMatrixEntry) * depth);
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/* We need walk the list of entries from the init/load/save entry
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* back towards the leaf node but the nodes don't link to their
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* children so we need to re-walk them here to add to a separate
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* array. */
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for (i = depth - 1, current = entry;
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i >= 0 && current;
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i--, current = current->parent)
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{
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children[i] = current;
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}
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#ifdef COGL_ENABLE_DEBUG
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if (COGL_DEBUG_ENABLED (COGL_DEBUG_PERFORMANCE) &&
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entry->composite_gets >= 2)
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{
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COGL_NOTE (PERFORMANCE,
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"Re-composing a matrix stack entry multiple times");
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}
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#endif
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for (i = 0; i < depth; i++)
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{
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switch (children[i]->op)
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{
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case COGL_MATRIX_OP_TRANSLATE:
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{
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CoglMatrixEntryTranslate *translate =
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(CoglMatrixEntryTranslate *)children[i];
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cogl_matrix_translate (matrix,
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translate->translate.x,
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translate->translate.y,
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translate->translate.z);
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continue;
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}
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case COGL_MATRIX_OP_ROTATE:
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{
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CoglMatrixEntryRotate *rotate=
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(CoglMatrixEntryRotate *)children[i];
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cogl_matrix_rotate (matrix,
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rotate->angle,
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graphene_vec3_get_x (&rotate->axis),
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graphene_vec3_get_y (&rotate->axis),
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graphene_vec3_get_z (&rotate->axis));
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continue;
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}
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case COGL_MATRIX_OP_ROTATE_EULER:
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{
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CoglMatrixEntryRotateEuler *rotate =
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(CoglMatrixEntryRotateEuler *)children[i];
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cogl_matrix_rotate_euler (matrix,
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&rotate->euler);
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continue;
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}
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case COGL_MATRIX_OP_SCALE:
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{
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CoglMatrixEntryScale *scale =
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(CoglMatrixEntryScale *)children[i];
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cogl_matrix_scale (matrix,
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scale->x,
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scale->y,
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scale->z);
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continue;
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}
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case COGL_MATRIX_OP_MULTIPLY:
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{
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CoglMatrixEntryMultiply *multiply =
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(CoglMatrixEntryMultiply *)children[i];
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cogl_matrix_multiply (matrix, matrix, &multiply->matrix);
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continue;
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}
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case COGL_MATRIX_OP_LOAD_IDENTITY:
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case COGL_MATRIX_OP_LOAD:
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case COGL_MATRIX_OP_SAVE:
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g_warn_if_reached ();
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continue;
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}
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}
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return NULL;
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}
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@ -793,7 +753,7 @@ cogl_matrix_entry_equal (CoglMatrixEntry *entry0,
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{
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CoglMatrixEntryMultiply *mult0 = (CoglMatrixEntryMultiply *)entry0;
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CoglMatrixEntryMultiply *mult1 = (CoglMatrixEntryMultiply *)entry1;
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if (!cogl_matrix_equal (&mult0->matrix, &mult1->matrix))
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if (!graphene_matrix_equal (&mult0->matrix, &mult1->matrix))
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return FALSE;
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}
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break;
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@ -804,7 +764,7 @@ cogl_matrix_entry_equal (CoglMatrixEntry *entry0,
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/* There's no need to check any further since an
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* _OP_LOAD makes all the ancestors redundant as far as
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* the final matrix value is concerned. */
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return cogl_matrix_equal (&load0->matrix, &load1->matrix);
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return graphene_matrix_equal (&load0->matrix, &load1->matrix);
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}
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case COGL_MATRIX_OP_SAVE:
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/* We skip over saves above so we shouldn't see save entries */
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@ -890,14 +850,14 @@ cogl_debug_matrix_entry_print (CoglMatrixEntry *entry)
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{
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CoglMatrixEntryMultiply *mult = (CoglMatrixEntryMultiply *)entry;
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g_print (" MULT:\n");
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_cogl_matrix_prefix_print (" ", &mult->matrix);
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graphene_matrix_print (&mult->matrix);
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continue;
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}
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case COGL_MATRIX_OP_LOAD:
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{
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CoglMatrixEntryLoad *load = (CoglMatrixEntryLoad *)entry;
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g_print (" LOAD:\n");
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_cogl_matrix_prefix_print (" ", &load->matrix);
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graphene_matrix_print (&load->matrix);
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continue;
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}
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case COGL_MATRIX_OP_SAVE:
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